10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

þANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2015

OR

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the Transition Period from             to       

Commission File No. 1-11778

CHUBB LIMITED

(Exact name of registrant as specified in its charter)

Switzerland	98-0091805
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

Baerengasse 32

Zurich, Switzerland CH-8001

(Address of principal executive offices) (Zip Code)

+41 (0)43 456 76 00

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:
Title of each class	Name of each exchange on which registered
Common Shares, par value CHF 24.15 per share	New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.

YES þ NO ¨

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.

YES ¨ NO þ

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15 (d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. YES þ NO ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). YES þ NO ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§229.405 of this chapter) is not contained herein, and will not be contained, to the best of the registrant's knowledge, in definitive proxy or information statements incorporated by reference into Part III of this Form 10-K or any amendment to this Form 10-K. ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer  þ		Accelerated filer ¨
Non-accelerated filer  ¨	(Do not check if a smaller reporting company)	Smaller reporting company ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). YES ¨ NO þ

The aggregate market value of voting stock held by non-affiliates as of June 30, 2015 (the last business day of the registrant's most recently completed second fiscal quarter), was approximately $33 billion. For the purposes of this computation, shares held by directors and officers of the registrant have been excluded. Such exclusion is not intended, nor shall it be deemed, to be an admission that such persons are affiliates of the registrant.

As of February 12, 2016 there were 461,670,290 Common Shares par value CHF 24.15 of the registrant outstanding.

Documents Incorporated by Reference

Certain portions of the registrant's definitive proxy statement relating to its 2016 Annual General Meeting of Shareholders are incorporated by reference into Part III of this report.

CHUBB LIMITED INDEX TO 10-K

PART I		Page
ITEM 1.	Business	2
ITEM 1A.	Risk Factors	19
ITEM 1B.	Unresolved Staff Comments	31
ITEM 2.	Properties	31
ITEM 3.	Legal Proceedings	31
ITEM 4.	Mine Safety Disclosures	31
PART II
ITEM 5.	Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	32
ITEM 6.	Selected Financial Data	34
ITEM 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	35
ITEM 7A.	Quantitative and Qualitative Disclosures About Market Risk	87
ITEM 8.	Financial Statements and Supplementary Data	92
ITEM 9.	Changes in and Disagreements With Accountants on Accounting and Financial Disclosure	92
ITEM 9A.	Controls and Procedures	92
ITEM 9B.	Other Information	92
PART III
ITEM 10.	Directors, Executive Officers and Corporate Governance	93
ITEM 11.	Executive Compensation	93
ITEM 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	93
ITEM 13.	Certain Relationships and Related Transactions, and Director Independence	93
ITEM 14.	Principal Accounting Fees and Services	93
PART IV
ITEM 15.	Exhibits, Financial Statements Schedules	94

PART I

ITEM 1. Business

General

On January 14, 2016, we completed the acquisition of The Chubb Corporation, creating a global leader in property and casualty insurance. We have changed our name from ACE Limited to Chubb Limited and plan to adopt the Chubb name globally, although some subsidiaries may continue to use ACE as part of their names. All references to Chubb Limited throughout this Form 10-K refer to legacy ACE Limited, unless otherwise indicated. The financial condition and results of operations presented herein are those of legacy ACE Limited and its subsidiaries and do not include the financial conditions and results of operations of legacy Chubb Corporation and its subsidiaries.

Chubb Limited is the Swiss-incorporated holding company of the Chubb Group of Companies. Chubb Limited, which is headquartered in Zurich, Switzerland, and its direct and indirect subsidiaries (collectively, the Chubb Group of Companies, Chubb, we, us, or our) are a global insurance and reinsurance organization, serving the needs of a diverse group of clients worldwide. At December 31, 2015, we had total assets of $102 billion and shareholders’ equity of $29 billion. Chubb was incorporated in 1985 at which time it opened its first business office in Bermuda and continues to maintain operations in Bermuda.

We offer commercial insurance products and service offerings such as risk management programs, loss control and engineering and complex claims management. We provide specialized insurance products ranging from Directors & Officers (D&O) and professional liability to various specialty-casualty and umbrella and excess casualty lines to niche areas such as aviation and energy. We also offer personal lines insurance coverage including homeowners, automobile, valuables, umbrella liability, and recreational marine products. In addition, we supply personal accident, supplemental health, and life insurance to individuals in select countries. We have grown our business through increased premium volume, expansion of product offerings and geographic reach, and the acquisition of other companies. During 2015, we acquired the Fireman's Fund Insurance Company high net worth personal lines business in the U.S., which included the renewal rights for new and existing business and reinsurance of all existing reserves. This business operates under our Insurance – North American P&C segment and the consolidated financial statements include the results of this business from the acquisition date.

With the acquisition of The Chubb Corporation we have become a global P&C leader, with highly complementary business lines, distribution channels, customer segments and underwriting skills. In the U.S., where The Chubb Corporation has a substantial presence, the acquisition makes us a leading insurer of business, from the large corporate segment to the middle market, with a broad variety of coverages. Together we have become one of the largest commercial insurers in the U.S.  Internationally, where legacy ACE is a truly global insurer with extensive presence in 54 countries, The Chubb Corporation’s operations in 25 markets are expected to add to our presence and capabilities and position us to better pursue important market opportunities globally.  We expect the combined company to be a top-tier leader in a number of global specialty and traditional products such as professional lines, risk management, workers compensation, accident and health (A&H) and other property and general casualty lines.

Refer to Note 2 to the Consolidated Financial Statements for additional information on our acquisitions.

At December 31, 2015, we employed approximately 22,000 people. We believe that employee relations are satisfactory.

We make available free of charge through our website (investors.chubb.com, under Financials) our annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports, if any, filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act as soon as reasonably practicable after they have been electronically filed with or furnished to the U.S. Securities and Exchange Commission (SEC). Also available through our website (under Investor Information / Corporate Governance) are our Corporate Governance Guidelines, Code of Conduct, and Charters for the Committees of our Board of Directors (the Board). Printed documents are available by contacting our Investor Relations Department (Telephone: +1 (441) 299-9283, E-mail: investorrelations@chubb.com).

We also use our website as a means of disclosing material, non-public information and for complying with our disclosure obligations under SEC Regulation FD (Fair Disclosure). Accordingly, investors should monitor the Investor Information portion of our website, in addition to following our press releases, SEC filings, and public conference calls and webcasts. The information contained on, or that may be accessed through, our website is not incorporated by reference into, and is not a part of, this

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report. The public may also read and copy any materials Chubb files with the SEC at the SEC's Public Reference Room at 100 F Street, NE, Washington, DC 20549 or by calling the SEC at 1-800-SEC-0330. The SEC maintains an Internet site (www.sec.gov) that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC.

Customers

For most commercial lines of business we offer, insureds typically use the services of an insurance broker or agent. An insurance broker acts as an agent for the insureds, offering advice on the types and amount of insurance to purchase and also assisting in the negotiation of price and terms and conditions. We obtain business from the local and major international insurance brokers and typically pay a commission to brokers for any business accepted and bound. Loss of all or a substantial portion of the business provided by one or more of these brokers could have a material adverse effect on our business. In our opinion, no material part of our business is dependent upon a single insured or group of insureds. We do not believe that the loss of any one insured would have a material adverse effect on our financial condition or results of operations, and no one insured or group of affiliated insureds account for as much as 10 percent of our total revenues.

Competition

Competition in the insurance and reinsurance marketplace is substantial. Competitors include other stock companies, mutual companies, alternative risk sharing groups (such as group captives and catastrophe pools), and other underwriting organizations. Competitors sell through various distribution channels and business models, across a broad array of product lines, and with a high level of variation regarding geographic, marketing, and customer segmentation. We compete for business not only on the basis of price but also on the basis of availability of coverage desired by customers and quality of service. Our ability to compete is dependent on a number of factors, particularly our ability to maintain the appropriate financial strength ratings as assigned by independent rating agencies. Our broad market capabilities in personal, commercial, specialty, and A&H lines made available by our underwriting expertise, business infrastructure, and global presence, define our competitive advantage. Our strong balance sheet is attractive to businesses, and our strong capital position and global platform affords us opportunities for growth not available to smaller, less diversified insurance companies. Refer to “Segment Information” for competitive environment by segment.

Trademarks and Trade Names

Various trademarks and trade names we use protect names of certain products and services we offer and are important to the extent they provide goodwill and name recognition in the insurance industry. We use commercially reasonable efforts to protect these proprietary rights, including various trade secret and trademark laws. We intend to retain material trademark rights in perpetuity, so long as it satisfies the use and registration requirements of applicable countries. One or more of the trademarks and trade names could be material to our ability to sell our products and services. We have taken appropriate steps to protect our ownership of key names, and we believe it is unlikely that anyone would be able to prevent us from using names in places or circumstances material to our operations.

Segment Information

Through December 31, 2015, we operated through five business segments. The following table presents net premiums earned (NPE) by segment:

Years Ended December 31 (in millions of U.S. dollars, except for percentages)	2015 Net Premiums Earned		% of Total		2014 Net Premiums Earned		% of Total		2013 Net Premiums Earned		% of Total
Insurance – North American P&C	$	6,582	38	%	$	6,107	35	%	$	5,721	34	%
Insurance – North American Agriculture	1,364		8	%	1,526		9	%	1,678		10	%
Insurance – Overseas General	6,471		38	%	6,805		39	%	6,333		38	%
Global Reinsurance	849		5	%	1,026		6	%	976		6	%
Life	1,947		11	%	1,962		11	%	1,905		12	%
Total	$	17,213	100	%	$	17,426	100	%	$	16,613	100	%

Additional financial information about our segments, including net premiums earned by geographic region, is included in

Note 16 to the Consolidated Financial Statements.

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Insurance – North American P&C (38 percent of 2015 Consolidated NPE)

Overview

The Insurance – North American P&C segment comprises operations in the U.S., Canada, and Bermuda. This segment includes:

• Our retail divisions: ACE USA (including ACE Canada), ACE Commercial Risk Services, and ACE Private Risk Services, which includes the Fireman’s Fund high net worth personal lines business acquired effective April 1, 2015

• Our wholesale and specialty divisions: ACE Westchester and ACE Bermuda

• Various run-off operations, including Brandywine Holdings Corporation (Brandywine)

Products and Distribution

ACE USA, the segment's largest operation, represented 62percent of Insurance – North American P&C's net premiums earned in 2015. ACE USA provides a broad array of traditional and specialty P&C, A&H, and risk management products and services to a diverse group of North American commercial and non-commercial enterprises and consumers. ACE USA distributes its insurance products primarily through a limited number of retail brokers. In addition to using brokers, certain products are also distributed through general agents, independent agents, managing general agents (MGA), managing general underwriters, alliances, affinity groups, and direct marketing operations. Products and services offered include property, general liability, umbrella and excess liability, workers' compensation, commercial marine, automobile liability, professional lines D&O and errors and omissions (E&O), surety, medical liability, environmental, inland marine, aerospace, A&H coverages, as well as claims and risk management products and services.

ACE USA's on-going operations are organized into the following distinct business units each offering specialized products and services targeted at specific niche markets:

• ACE Risk Management offers a range of customized risk management primary casualty products designed to help mid-size to large insureds, including national accounts, address the significant costs of financing and managing risk for workers’ compensation, general liability and automobile liability coverages. Within ACE Risk Management, ACE Financial Solutions (AFS) underwrites contractual indemnification policies in which AFS provides prospective coverage for loss events within the insured’s policy retention levels, and underwrites assumed loss portfolio transfer (LPT) contracts in which insured loss events have occurred prior to the inception of the contract. LPT contracts can cause significant variances to premiums, losses and loss expenses, and expense ratios in the periods in which they are written.

• ACE Foreign Casualty provides products which insure specific global operating risks of U.S.-based multinational companies and include deductible programs, captive programs, and paid or incurred loss retrospective plans for U.S.-based insured's foreign operations.

• ACE North America Property & Specialty Lines provide products and services including primary, quota share and excess all-risk insurance, risk management programs and services, commercial and inland marine products, and aerospace products.

• ACE Casualty Risk key coverages include umbrella and excess liability, environmental risk, and casualty programs for commercial construction related projects.

• ACE Professional Risk provides management liability and professional liability (D&O and E&O) products.

• ACE Surety offers a wide variety of surety products and specializes in underwriting both commercial and contract bonds and has the capacity for bond issuance on an international basis.

• ACE Canada (ACE USA's Canadian operations) offers a broad range of P&C products as well as life and A&H coverages.

• ACE Accident & Health products include employee benefit plans, occupational accident, student accident, and worldwide travel accident and global medical programs. With respect to products that include supplemental medical and hospital indemnity coverages, we typically pay fixed amounts for claims and are therefore insulated from rising health care costs. ACE Accident & Health also provides specialty personal lines products, including credit card enhancement programs (identity theft, rental car collision damage waiver, trip travel, and purchase protection benefits) distributed through affinity groups.

• ACE Medical Risk offers a wide range of specialty liability products for the health care industry through licensed excess and surplus lines brokers. Products include primary coverages for professional liability and general liability for selected types of medical facilities, excess/umbrella liability for medical facilities, primary and excess coverages for products liability for biotechnology and specialty pharmaceutical companies, and liability insurance for human clinical trials.

• ESIS Inc. (ESIS), ACE USA's in-house third-party claims administrator, performs claims management and risk control services for domestic and international organizations as well as for the Insurance – North American P&C segment. ESIS services include comprehensive medical managed care; integrated disability services; pre-loss control and risk

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management; and health, safety and environmental consulting; salvage and subrogation; and health care recovery services. The net results for ESIS are included in Insurance – North American P&C's administrative expenses.

ACE Commercial Risk Services provides comprehensive specialty product solutions and packaged plans to small and micro-sized companies in targeted industries that lend themselves to technology-assisted underwriting. Core products and services for small businesses include casualty insurance (including international casualty), environmental, inland marine, professional risk, disaster protection, vacant land and building, and claims and risk management services. Products are offered through wholesale, retail, program agent and alternative distribution channels. In addition, ACE Commercial Risk Services offers coverage for specialty programs through program agents.

ACE Private Risk Services provides high-value personal lines coverages for high net worth individuals and families in North America including homeowners, automobile, valuables (including fine art), umbrella liability, and recreational marine insurance offered through independent regional agents and brokers. During 2015, ACE Private Risk Services expanded its operations through the acquisition of the Fireman's Fund Insurance Company high net worth personal lines insurance business in the U.S.

ACE Westchester serves the market for business risks that tend to be hard to place due to unique or complex exposures. Products offered include wholesale excess and surplus lines property, casualty, environmental, professional liability, inland marine, and product recall coverages in North America.

ACE Bermuda, our original insurance company, provides commercial insurance products on an excess basis including excess liability, D&O, professional liability, property insurance, and political risk, the latter being written by Sovereign Risk Insurance Ltd., a wholly-owned managing agent. ACE Bermuda focuses on Fortune 1000 companies and targets risks that are generally low in frequency and high in severity. ACE Bermuda offers its products primarily through the Bermuda offices of major, internationally recognized insurance brokers.

The run-off operations do not actively sell insurance products, but are responsible for the management of certain existing policies and settlement of related claims.

Competitive Environment

ACE USA and ACE Westchester compete against a number of large, national carriers as well as regional competitors and other entities offering risk alternatives such as self-insured retentions and captive programs. The markets in which we compete are subject to significant cycles of fluctuating capacity and wide disparities in price adequacy. We strive to offer superior service, which we believe has differentiated us from our competitors. The ACE USA and ACE Westchester operations pursue a specialist strategy and focus on market opportunities where we can compete effectively based on service levels and product design, while still achieving an adequate level of profitability. A competitive advantage is also achieved through ACE USA's innovative product offerings and our ability to provide multiple products to a single client due to our nationwide local presence. An additional competitive strength of all our domestic commercial units is the ability to deliver global products and coverage to customers in concert with our Insurance – Overseas General segment. ACE USA has grown, in part, from the leveraging of cross-marketing opportunities with our other operations to take advantage of our organization's global presence. ACE Bermuda competes against international commercial carriers writing business on an excess of loss basis. ACE Commercial Risk Services competes against numerous insurance companies ranging from large national carriers to small and mid-size insurers who provide specialty coverages and standard P&C products. ACE Private Risk Services competes against insurance companies of varying sizes that sell products through various distribution channels, including through the Internet.

Insurance – North American Agriculture (8 percent of 2015 Consolidated NPE)

Overview

The Insurance – North American Agriculture segment comprises our North American based businesses that provide a variety of coverages in the U.S. and Canada including crop insurance, primarily Multiple Peril Crop Insurance (MPCI) and crop-hail through Rain and Hail Insurance Service, Inc. (Rain and Hail) as well as farm and ranch and specialty P&C commercial insurance products and services through our ACE Agribusiness unit.

Products and Distribution

The Rain and Hail business provides comprehensive MPCI and crop-hail insurance, and the ACE Agribusiness offers farm and ranch coverages as well as specialty P&C coverages for companies that manufacture, process and distribute agriculture products. The MPCI program is offered in conjunction with the U.S. Department of Agriculture (USDA). The USDA's Risk Management Agency (RMA) sets the policy terms and conditions, rates and forms, and is also responsible for setting

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compliance standards. As a participating company, we report all details of policies underwritten to the RMA and are party to a Standard Reinsurance Agreement (SRA). The SRA sets out the relationship between private insurance companies and the Federal Crop Insurance Corporation (FCIC) concerning the terms and conditions regarding the risks each will bear including the pro-rata and state stop-loss provisions which allow companies to limit the exposure of any one state or group of states on their underwriting results. In addition to the pro-rata and excess of loss reinsurance protections inherent in the SRA, we also purchase third-party proportional and stop-loss reinsurance for our MPCI business to reduce our exposure. We may also enter into crop derivative contracts to further manage our risk exposure. For additional information, refer to “Crop Insurance”, under Item 7.

Competitive Environment

Rain and Hail primarily operates in a federally regulated program where all approved providers offer the same product forms and rates through independent and/or captive agents. ACE Agribusiness competes against both national and regional competitors offering specialty P&C insurance coverages to companies that manufacture, process, and distribute agricultural products.

Insurance – Overseas General (38 percent of 2015 Consolidated NPE)

Overview

The Insurance – Overseas General segment comprises ACE International, ACE Global Markets (AGM) and the international supplemental A&H business of Combined Insurance. ACE International comprises our retail commercial P&C, A&H, and personal lines businesses serving territories outside the U.S., Bermuda, and Canada. AGM, our London-based international specialty and excess and surplus lines business, includes Lloyd's of London (Lloyd's) Syndicate 2488 (Syndicate 2488), a wholly-owned Chubb syndicate. Chubb provides funds at Lloyd's to support underwriting by Syndicate 2488, which is managed by ACE Underwriting Agencies Limited and has an underwriting capacity of £350 million for 2016. The reinsurance operation of AGM is included in the Global Reinsurance segment.

Products and Distribution

ACE International maintains a presence in every major insurance market in the world and is organized geographically along product lines as follows: ACE Europe, ACE Asia Pacific, ACE Eurasia and Africa, ACE Far East, and ACE Latin America. Products offered include P&C, A&H, specialty coverages, and personal lines insurance products and services. ACE International's P&C business is generally written, on both a direct and assumed basis, through major international, regional, and local brokers and agents. Certain ACE Europe branded products are also offered via an e-commerce platform, ACE Online, that allows brokers to quote, bind, and issue specialty policies online. Property insurance products include traditional commercial fire coverage as well as energy industry-related, marine, construction, and other technical coverages. Principal casualty products are commercial primary and excess casualty, environmental, and general liability. A&H and other consumer lines products are distributed through brokers, agents, direct marketing programs, and sponsor relationships. ACE International specialty coverages include D&O, professional indemnity, energy, aviation, political risk, and specialty personal lines products. The A&H operations primarily offer personal accident and supplemental medical coverages including accidental death, business/holiday travel, specified disease, disability, medical and hospital indemnity, and income protection. We are not in the primary health care business. With respect to our supplemental medical and hospital indemnity products, we typically pay fixed amounts for claims and are therefore largely insulated from the direct impact of rising health care costs. ACE International's personal lines operations provide specialty products and services designed to meet the needs of specific target markets and include property damage, automobile, homeowners, and personal liability.

AGM offers products through its parallel distribution network via ACE European Group Limited (AEGL) and Syndicate 2488. AGM uses Syndicate 2488 to underwrite P&C business on a global basis through Lloyd's worldwide licenses. AGM uses AEGL to underwrite similar classes of business through its network of U.K. and European licenses, and in the U.S. where it is eligible to write excess and surplus lines business. Factors influencing the decision to place business with Syndicate 2488 or AEGL include licensing eligibilities, capitalization requirements, and client/broker preference. All business underwritten by AGM is accessed through registered brokers. The main lines of business include aviation, property, energy, professional lines, marine, financial lines, political risk, and A&H.

Combined Insurance uses an international sales force to distribute a wide range of supplemental A&H products including personal accident, short term disability, critical conditions and cancer aid, and hospital confinement/recovery. Most of the products are supplemental A&H products, primarily fixed-indemnity obligations, and are not subject directly to escalating medical cost inflation.

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Competitive Environment

ACE International's primary competitors include U.S.-based companies with global operations, as well as non-U.S. global carriers and indigenous companies in regional and local markets. For the A&H lines of business, including those offered by Combined Insurance, locally based competitors include financial institutions and bank owned insurance subsidiaries. Our international operations have the distinct advantage of being part of one of the few international insurance groups with a global network of licensed companies able to write policies on a locally admitted basis. The principal competitive factors that affect the international operations are underwriting expertise and pricing, relative operating efficiency, product differentiation, producer relations, and the quality of policyholder services. A competitive strength of our international operations is our global network and breadth of insurance programs, which assist individuals and business organizations to meet their risk management objectives, while also giving us the advantage of accessing local technical expertise, accomplishing a spread of risk, and offering a global network to service multinational accounts.

AGM is one of the preeminent international specialty insurers in London and is an established lead underwriter on a significant portion of the risks it underwrites for all lines of business. This leadership position allows AGM to set the policy terms and conditions of many of the policies written. All lines of business face competition, depending on the business class, from Lloyd's syndicates, the London market, and other major international insurers and reinsurers. Competition for international risks is also seen from domestic insurers in the country of origin of the insured. AGM differentiates itself from competitors through long standing experience in its product lines, its multiple insurance entities (Syndicate 2488 and AEGL), and the quality of its underwriting and claims service.

Global Reinsurance (5 percent of 2015 Consolidated NPE)

Overview

The Global Reinsurance segment represents Chubb's reinsurance operations comprising ACE Tempest Re Bermuda, ACE Tempest Re USA, ACE Tempest Re International, and ACE Tempest Re Canada. The Global Reinsurance segment also includes AGM's reinsurance operations. Global Reinsurance markets reinsurance products worldwide under the ACE Tempest Re brand name and provides solutions for small to mid-sized clients and multinational ceding companies including licensed reinsurance capabilities, property and workers' compensation catastrophe, loss-warranty, stop-loss cover, marine and aviation programs.

Products and Distribution

Global Reinsurance services clients globally through its major units. Major international brokers submit business to one or more of these units' underwriting teams who have built strong relationships with both key brokers and clients by providing a responsive, client-focused approach to risk assessment and pricing.

ACE Tempest Re Bermuda principally provides property catastrophe reinsurance on an excess of loss basis globally to insurers of commercial and personal property. Property catastrophe reinsurance is on an occurrence basis and protects a ceding company against an accumulation of losses covered by its issued insurance policies, arising from a common event or occurrence. ACE Tempest Re Bermuda underwrites reinsurance principally on an excess of loss basis, meaning that its exposure only arises after the ceding company's accumulated losses have exceeded the attachment point of the reinsurance policy. ACE Tempest Re Bermuda also writes other types of reinsurance on a limited basis for selected clients. Examples include proportional property where the reinsurer shares a proportional part of the premiums and losses of the ceding company and per risk excess of loss treaty reinsurance where coverage applies on a per risk basis rather than per event or aggregate basis, together with casualty (catastrophe workers' compensation) and specialty lines (crop and terrorism). ACE Tempest Re Bermuda's business is produced through reinsurance intermediaries.

ACE Tempest Re USA writes all lines of traditional and specialty P&C reinsurance, and surety and fidelity reinsurance for the North American market, principally on a treaty basis, with a focus on writing property per risk and casualty reinsurance. ACE Tempest Re USA underwrites reinsurance on both a proportional and excess of loss basis. This unit's diversified portfolio is produced through reinsurance intermediaries.

ACE Tempest Re International provides traditional and specialty P&C reinsurance to insurance companies worldwide, with emphasis on non-U.S. and Canadian risks. ACE Tempest Re International writes all lines of traditional and specialty reinsurance including property risk and property catastrophe, casualty, marine, aviation, and specialty through our London- and Zurich-based divisions. The London-based divisions of ACE Tempest Re International focus on the development of business sourced through London market brokers and, accordingly, write a diverse book of international business using Syndicate 2488 and AEGL. The Zurich-based division focuses on providing reinsurance to continental European insurers via continental European brokers while also serving Asian and Latin American markets. ACE Tempest Re International also includes our Shanghai, China

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office which provides reinsurance coverage for Chinese-based risks. ACE Tempest Re International underwrites reinsurance on both a proportional and excess of loss basis.

ACE Tempest Re Canada offers a full array of traditional and specialty P&C, and Surety reinsurance to the Canadian market, including casualty, property risk and property catastrophe. ACE Tempest Re Canada provides coverage through its Canadian company platform and also offers clients access to Syndicate 2488. ACE Tempest Re Canada underwrites reinsurance on both a proportional and excess of loss basis.

Competitive Environment

The Global Reinsurance segment competes worldwide with major U.S. and non-U.S. reinsurers as well as reinsurance departments of numerous multi-line insurance organizations. In addition, over the last several years, capital markets participants have developed financial products intended to compete with traditional reinsurance. Additionally, government sponsored or backed catastrophe funds can affect demand for reinsurance. Global Reinsurance is considered a lead reinsurer and is typically involved in the negotiation and quotation of the terms and conditions of the majority of the contracts in which it participates. Global Reinsurance competes effectively in P&C markets worldwide because of its strong capital position, analytical capabilities and quality customer service, the leading role it plays in setting the terms, pricing, and conditions in negotiating contracts, and its customized approach to risk selection. The key competitors in our markets vary by geographic region and product line. An advantage of our international platform is that we are able to change our mix of business in response to changes in competitive conditions in the territories in which we operate. Our geographic reach is also sought by multinational ceding companies since all of our offices, with the exception of Bermuda, provide local reinsurance license capabilities which benefit our clients in dealing with country regulators.

Life (11 percent of 2015 Consolidated NPE)

Overview

The Life segment comprises ACE's international life operations (ACE Life), ACE Tempest Life Re (ACE Life Re), and the North American supplemental A&H and life business of Combined Insurance.

Products and Distribution

ACE Life provides individual life and group benefit insurance primarily in emerging markets, including Egypt, Hong Kong, Indonesia, South Korea, Taiwan, Thailand, and Vietnam; also throughout Latin America; selectively in Europe; and in China through a non-consolidated joint venture insurance company. ACE Life offers a broad portfolio of protection and savings products including whole life, endowment plans, individual term life, group term life, group medical, personal accident, credit life, universal life, and unit linked contracts. The policies written by ACE Life generally provide funds to beneficiaries of insureds after death and/or protection and/or savings benefits while the contract owner is living. ACE Life sells to consumers through a variety of distribution channels including agency, bancassurance, worksite marketing, retailers, brokers, and direct to consumer marketing. We continue to expand ACE Life with a focus on opportunities in emerging markets that we believe will result in strong and sustainable operating profits as well as a favorable return on capital commitments over time. Our dedicated agency distribution channel, whereby agents sell ACE Life products exclusively, enables us to maintain direct contact with the individual consumer, promote quality sales practices, and exercise greater control over the future of the business. We have developed a substantial sales force of agents principally located in our Asia-Pacific countries. Chubb also maintains approximately 35.9 percent direct and indirect ownership interest in Huatai Life Insurance Co., Ltd. (Huatai Life), which commenced operations in 2005 and has since grown to become one of the largest life insurance foreign joint ventures in China. Huatai Life offers a broad portfolio of insurance products through a variety of distribution channels including approximately 296 licensed sales locations in 15 Chinese provinces.

ACE Life Re's core business is a Bermuda-based operation which provides reinsurance to primary life insurers, focusing on guarantees included in certain fixed and variable annuity products and also on more traditional mortality reinsurance protection. ACE Life Re's U.S.-based traditional life reinsurance operation was discontinued for new business in January 2010. Since 2007, ACE Life Re has not quoted on new opportunities in the variable annuity reinsurance marketplace and our focus has been on managing the current portfolio of risk, both in the aggregate and on a contract basis. This business is managed with a long-term perspective and short-term earnings volatility is expected.

Combined Insurance distributes specialty supplemental A&H and life insurance products targeted to middle income consumers and businesses in the U.S. and Canada. Combined Insurance's substantial North American sales force distributes a wide range of supplemental accident and sickness insurance products, including personal accident, short-term disability, critical illness,

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Medicare supplement products, and hospital confinement/recovery. Most of these products are primarily fixed-indemnity benefit obligations and are not directly subject to escalating medical cost inflation.

Competitive Environment

ACE Life's competition differs by location but generally includes multinational insurers, and in some locations, local insurers, joint ventures, or state-owned insurers. Chubb's financial strength and reputation as an entrepreneurial organization with a global presence gives ACE Life a strong base from which to compete. While ACE Life Re is not currently quoting on new opportunities in the variable annuity reinsurance marketplace, we continue to monitor developments in this market. Combined Insurance competes for A&H business in the U.S. against numerous A&H and life insurance companies across various industry segments.

Underwriting

Chubb is an underwriting company and we strive to emphasize quality of underwriting rather than volume of business or market share. Our underwriting strategy is to manage risk by employing consistent, disciplined pricing and risk selection. This, coupled with writing a number of less cyclical product lines, has helped us develop flexibility and stability of our business, and has allowed us to maintain a profitable book of business throughout market cycles. Clearly defined underwriting authorities, standards, and guidelines coupled with a strong underwriting audit function are in place in each of our local operations and global profit centers. Global product boards ensure consistency of approach and the establishment of best practices throughout the world. Our priority is to help ensure adherence to criteria for risk selection by maintaining high levels of experience and expertise in our underwriting staff. In addition, we employ a business review structure that helps ensure control of risk quality and conservative use of policy limits and terms and conditions. Underwriting discipline is at the heart of our operating philosophy.

Qualified actuaries in each region work closely with the underwriting teams to provide additional expertise in the underwriting process. We use internal and external data together with sophisticated analytical, catastrophe loss and risk modeling techniques to ensure an appropriate understanding of risk, including diversification and correlation effects, across different product lines and territories. This helps to ensure that losses are contained within our risk tolerance and appetite for individual product lines, businesses, and Chubb as a whole. Our use of such tools and data also reflects an understanding of their inherent limitations and uncertainties. We also purchase protection from third parties, including, but not limited to, reinsurance as a tool to diversify risk and limit the net loss potential of catastrophes and large or unusually hazardous risks. For additional information refer to "Risk Factors" under Item 1A, “Reinsurance Protection”, below, “Catastrophe Management” and “Natural Catastrophe Property Reinsurance Program”, under Item 7, and Note 5 to the Consolidated Financial Statements, under Item 8.

Reinsurance Protection

As part of our risk management strategy, we purchase reinsurance protection to mitigate our exposure to losses, including certain catastrophes, to a level consistent with our risk appetite. Although reinsurance agreements contractually obligate our reinsurers to reimburse us for an agreed-upon portion of our gross paid losses, reinsurance does not discharge our primary liability to our insureds and, thus, we ultimately remain liable for the gross direct losses. In certain countries, reinsurer selection is limited by local laws or regulations. In most countries there is more freedom of choice, and the counterparty is selected based upon its financial strength, claims settlement record, management, line of business expertise, and its price for assuming the risk transferred. In support of this process, we maintain a Chubb authorized reinsurer list that stratifies these authorized reinsurers by classes of business and acceptable limits. This list is maintained by our Reinsurance Security Committee (RSC), a committee comprising senior management personnel and a dedicated reinsurer security team. Changes to the list are authorized by the RSC and recommended to the Chair of the Risk and Underwriting Committee. The reinsurers on the authorized list and potential new markets are regularly reviewed and the list may be modified following these reviews. In addition to the authorized list, there is a formal exception process that allows authorized reinsurance buyers to use reinsurers already on the authorized list for higher limits or different lines of business, for example, or other reinsurers not on the authorized list if their use is supported by compelling business reasons for a particular reinsurance program.

A separate policy and process exists for captive reinsurance companies. Generally, these reinsurance companies are established by our clients or our clients have an interest in them. It is generally our policy to obtain collateral equal to the expected losses that may be ceded to the captive. Where appropriate, exceptions to the collateral requirement are granted but only after senior management review. Specific collateral guidelines and an exception process are in place for the Insurance – North American P&C and Insurance – Overseas General segments, both of which have credit management units evaluating the captive's credit quality and that of their parent company. The credit management units, working with actuaries, determine reasonable exposure estimates (collateral calculations), ensure receipt of collateral in an acceptable form, and coordinate collateral adjustments as and when needed. Financial reviews and expected loss evaluations are performed annually for active captive accounts and as

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needed for run-off exposures. In addition to collateral, parental guarantees are often used to enhance the credit quality of the captive.

In general, we seek to place our reinsurance with highly rated companies with which we have a strong trading relationship. For additional information refer to “Catastrophe Management” and “Natural Catastrophe Property Reinsurance Program” under Item 7, and Note 5 to the Consolidated Financial Statements.

Unpaid Losses and Loss Expenses

We establish reserves for unpaid losses and loss expenses, which are estimates of future payments on reported and unreported claims for losses and related expenses, with respect to insured events that have occurred. These reserves are recorded in Unpaid losses and loss expenses in the consolidated balance sheets. The process of establishing loss and loss expense reserves for P&C claims can be complex and is subject to considerable uncertainty as it requires the use of informed estimates and judgments based on circumstances known at the date of accrual. These estimates and judgments are based on numerous factors, and may be revised as additional experience and other data become available and are reviewed, as new or improved methodologies are developed, or as laws change. Internal actuaries regularly analyze the levels of loss and loss expense reserves, taking into consideration factors that may impact the ultimate settlement value of the unpaid losses and loss expenses. These analyses could result in future changes in the estimates of loss and loss expense reserves or reinsurance recoverables and any such changes would be reflected in our results of operations in the period in which the estimates are changed. Losses and loss expenses are charged to income as incurred. The reserve for unpaid losses and loss expenses represents the estimated ultimate losses and loss expenses less paid losses and loss expenses, and comprises case reserves and incurred but not reported (IBNR) loss reserves. With the exception of certain structured settlements, for which the timing and amount of future claim payments are reliably determinable, and certain reserves for unsettled claims that are discounted in statutory filings, our loss reserves are not discounted for the time value of money. In connection with such structured settlements and certain reserves for unsettled claims, we carried net discounted reserves of $92 million at December 31, 2015.

During the loss settlement period, which can be many years in duration, additional facts regarding individual claims and trends often will become known. As these become apparent, case reserves may be adjusted by allocation from IBNR with or without any change in the overall reserve. In addition, the circumstances of individual claims or the application of statistical and actuarial methods to loss experience data may lead to the adjustment of the overall reserves upward or downward from time to time. Accordingly, the ultimate settlement of losses may be significantly greater than or less than reported loss and loss expense reserves.

We have considered asbestos and environmental (A&E) claims and claims expenses in establishing the liability for unpaid losses and loss expenses and have developed reserving methods which consider historical experience as well as incorporate new sources of data to estimate the ultimate losses arising from A&E exposures. The reserves for A&E claims and claims expenses represent management's best estimate of future loss and loss expense payments and recoveries that are expected to develop over the next several decades. We continuously monitor evolving case law and its effect on environmental and latent injury claims, we monitor A&E claims activity quarterly, and we perform a full reserve review annually.

For each product line, management, in conjunction with internal actuaries, develops a “best estimate” of the ultimate settlement value of the unpaid losses and loss expenses that it believes provides a reasonable estimate of the required reserve. We evaluate our estimates of reserves quarterly in light of developing information. While we are unable at this time to determine whether additional reserves may be necessary in the future, we believe that our reserves for unpaid losses and loss expenses are adequate at December 31, 2015. Future additions to reserves, if needed, could have a material adverse effect on our financial condition, results of operations, and cash flows. For additional information refer to “Critical Accounting Estimates – Unpaid losses and loss expenses”, under Item 7, and Note 7 to the Consolidated Financial Statements, under Item 8.

The “Analysis of Losses and Loss Expenses Development” table shown below presents, for each balance sheet date over the period 2005-2015, the gross and net loss and loss expense reserves recorded at the balance sheet date and subsequent net payments on the associated liabilities. The reserves represent the amount required for the estimated future settlement value of liabilities incurred at or prior to the balance sheet date and those estimates may change subsequent to the balance sheet date as new information emerges regarding the ultimate settlement value of the liability. Accordingly, the table also presents through December 31, 2015, for each balance sheet date, the cumulative impact of subsequent valuations of the liabilities incurred at the original balance sheet date. The table is presented in accordance with SEC reporting requirements. This table should be interpreted with care by those not familiar with its format or those who are familiar with other triangulations arranged by origin year of loss such as accident or underwriting year rather than balance sheet date, as shown below. To clarify the interpretation of the table, we use the reserves established at December 31, 2005, in the following example.

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The top two lines of the table show, for successive balance sheet dates, the gross and net unpaid losses and loss expenses recorded as provision for liabilities incurred at or prior to each balance sheet date. It can be seen that at December 31, 2005, a reserve of $20.5 billion, net of reinsurance, had been established.

The upper (paid) triangulation shows the net amounts paid as of periods subsequent to the balance sheet date. Hence in the 2006 financial year, $3.7 billion of payments were made on liabilities contemplated in the December 31, 2005 reserve balance. At the end of the 2015 financial year, there were cumulative net payments of $13.7 billion on this block of liabilities.

The lower triangulation within the table shows the revised estimate of the net liability originally recorded at each balance sheet date as of the end of subsequent financial years. With the benefit of actual loss emergence and hindsight over the intervening period, the net liabilities incurred as of December 31, 2005, are now estimated to be $19.5 billion, rather than the original estimate of $20.5 billion. This change includes the impact of adverse development on latent claims that we categorize as A&E covered under the National Indemnity Company (NICO) reinsurance treaties. Of the cumulative redundancy of $1.0 billion recognized in the ten years since December 31, 2005 redundancy of $2.2 billion relates to non-latent claims and deficiency of $1.2 billion relates to latent claims. The redundancy of $957 million was identified and recorded as follows: $12 million redundant in 2006, $80 million redundant in 2007, $440 million redundant in 2008, $337 million redundant in 2009, $331 million redundant in 2010, $122 million redundant in 2011, $44 million deficient in 2012, $149 million deficient in 2013, $27 million deficient in 2014, and $145 million deficient in 2015. This development subsequent to the balance sheet date of valuation is referred to as prior period development.

Importantly, the cumulative deficiency or redundancy for different balance sheet dates are not independent and, therefore, should not be added together. In the last financial year, we revised our estimate of the December 31, 2005 liabilities from $19,356 million to $19,501 million. This adverse development of $145 million is also included in each column to the right of the December 31, 2005 column to recognize that this additional amount was also required in the reserves established for each annual balance sheet date from December 31, 2006 to December 31, 2015.

The loss development table shows that our original estimate of the net unpaid loss and loss expense requirement at December 31, 2014, of $27.0 billion has, with the benefit of actual loss emergence and hindsight, been revised to $26.5 billion at December 31, 2015. This favorable movement of $546 million reflects prior period development and is the net result of a number of underlying movements both favorable and adverse. The key underlying movements are discussed in more detail in Note 7 to the Consolidated Financial Statements under Item 8.

The bottom lines of the table show the re-estimated amount of previously recorded gross liabilities at December 31, 2015, together with the change in reinsurance recoverable. Similar to the net liabilities, the cumulative redundancy or deficiency on the gross liability is the difference between the gross liability originally recorded and the re-estimated gross liability at December 31, 2015. For example, with respect to the gross unpaid loss and loss expenses of $35.1 billion for December 31, 2005, this gross liability was re-estimated to be $33.9 billion at December 31, 2015, resulting in the cumulative redundancy on the gross liability originally recorded for the 2005 balance sheet year of $1.2 billion.

We do not consider it appropriate to extrapolate future deficiencies or redundancies based upon the table, as conditions and trends that have affected development of the liability in the past may not necessarily recur in the future. We believe that our current estimates of net liabilities appropriately reflect our current knowledge of the business profile and the prevailing market, social, legal, and economic conditions while giving due consideration to historical trends and volatility evidenced in our markets over the longer term. The key issues and considerations involved in establishing our estimate of the net liabilities are discussed in more detail within the “Critical Accounting Estimates – Unpaid losses and loss expenses” section of Item 7.

The Unpaid losses and loss expense information for acquired businesses has been included in the table from the acquisition date forward:

• Combined Insurance (April 1, 2008);

• Jerneh Insurance Berhad (December 1, 2010);

• Rain and Hail (we acquired all of the outstanding common stock not previously owned by us on December 28, 2010);

• Penn Millers Holding Corporation (November 30, 2011);

• Rio Guayas Compania de Seguros y Reaseguros (December 28, 2011);

• PT Asuransi Jaya Proteksi (we acquired 80 percent on September 18, 2012 and our local partner acquired the remaining 20 percent on January 3, 2013);

• Fianzas Monterrey (April 1, 2013);

• ABA Seguros (May 2, 2013);

• The Siam Commercial Samaggi Insurance PCL (we and our local partner acquired 93.03 percent during the second quarter of 2014);

• The large corporate account P&C insurance business of Itaú Seguros, S.A. (October 31, 2014); and

• Fireman's Fund Insurance Company high net worth personal lines insurance business in the U.S. (April 1, 2015).

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Analysis of Losses and Loss Expenses Development
	Years Ended December 31
(in millions of U.S. dollars)	2005			2006			2007			2008			2009			2010			2011			2012			2013			2014			2015
Gross unpaid losses	$	35,055		$	35,517		$	37,112		$	37,176		$	37,783		$	37,391		$	37,477		$	37,946		$	37,443		$	38,315		$	37,303
Net unpaid losses	20,458			22,008			23,592			24,241			25,038			25,242			25,875			26,547			26,831			27,008			26,562
Net paid losses (cumulative) as of:
1 year later	3,711			4,038			3,628			4,455			4,724			4,657			4,894			5,035			5,260			5,612
2 years later	6,487			6,356			6,092			7,526			7,510			7,281			7,714			7,969			8,245
3 years later	7,998			8,062			8,393			9,690			9,404			9,424			9,973			10,308
4 years later	9,269			9,748			9,949			11,114			11,097			11,102			11,757
5 years later	10,597			10,826			10,951			12,502			12,428			12,544
6 years later	11,428			11,496			11,985			13,556			13,493
7 years later	11,957			12,312			12,766			14,433
8 years later	12,664			12,970			13,491
9 years later	13,209			13,587
10 years later	13,745
Net liability re-estimated as of:
End of year	20,458			22,008			23,592			24,241			25,038			25,242			25,875			26,547			26,831			27,008			26,562
1 year later	20,446			21,791			22,778			23,653			24,481			24,686			25,396			26,017			26,304			26,462
2 years later	20,366			21,188			22,158			23,127			23,801			24,167			24,887			25,411			25,686
3 years later	19,926			20,650			21,596			22,576			23,363			23,690			24,299			24,940
4 years later	19,589			20,080			21,037			22,184			22,955			23,091			23,889
5 years later	19,258			19,618			20,773			21,913			22,476			22,805
6 years later	19,136			19,584			20,760			21,810			22,420
7 years later	19,180			19,684			20,667			21,834
8 years later	19,329			19,647			20,718
9 years later	19,356			19,705
10 years later	19,501
Cumulative redundancy/ (deficiency) on net unpaid losses	957			2,303			2,874			2,407			2,618			2,437			1,986			1,607			1,145			546
Cumulative deficiency related to A&E	(1,239		)	(1,187		)	(1,158		)	(1,107		)	(1,024		)	(920		)	(821		)	(651		)	(457		)	(200		)
Cumulative redundancy/ (deficiency) excluding A&E	2,196			3,490			4,032			3,514			3,642			3,357			2,807			2,258			1,602			746
Gross unpaid losses	35,055			35,517			37,112			37,176			37,783			37,391			37,477			37,946			37,443			38,315			37,303
Reinsurance recoverable on unpaid losses	14,597			13,509			13,520			12,935			12,745			12,149			11,602			11,399			10,612			11,307			10,741
Net unpaid losses	20,458			22,008			23,592			24,241			25,038			25,242			25,875			26,547			26,831			27,008			26,562
Gross liability re-estimated	33,906			33,082			33,563			34,320			34,347			33,909			34,681			35,614			35,848			37,349
Reinsurance recoverable on unpaid losses	14,405			13,377			12,845			12,486			11,927			11,104			10,792			10,674			10,162			10,887
Net liability re-estimated	19,501			19,705			20,718			21,834			22,420			22,805			23,889			24,940			25,686			26,462
Cumulative redundancy/ (deficiency) on gross unpaid losses	$	1,149		$	2,435		$	3,549		$	2,856		$	3,436		$	3,482		$	2,796		$	2,332		$	1,595		$	966

The reference to “losses” in the table above refers to losses and loss expenses.

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Reconciliation of Unpaid Losses and Loss Expenses

Net losses and loss expenses incurred for 2015 were $9.5 billion, compared with $9.6 billion in 2014, and $9.3 billion in 2013 which includes $546 million, $527 million, and $530 million of net favorable prior period development (PPD), respectively. Refer to Note 7 to the Consolidated Financial Statements for a reconciliation of Unpaid losses and loss expenses and for additional information on PPD.

Investments

Our objective is to maximize investment income and total return while ensuring an appropriate level of liquidity and investment quality and diversification. As such, Chubb's investment portfolio is invested primarily in investment-grade fixed-income securities as measured by the major rating agencies. We do not allow leverage or complex credit structures in our investment portfolio.

The critical aspects of the investment process are controlled by ACE Asset Management, an indirect wholly-owned subsidiary of Chubb. These aspects include asset allocation, portfolio and guideline design, risk management and oversight of external asset managers. In this regard, ACE Asset Management:

• conducts formal asset allocation modeling for each of the Chubb subsidiaries, providing formal recommendations for the portfolio's structure;

• establishes recommended investment guidelines that are appropriate to the prescribed asset allocation targets;

• provides the analysis, evaluation, and selection of our external investment advisors;

• establishes and develops investment-related analytics to enhance portfolio engineering and risk control;

• monitors and aggregates the correlated risk of the overall investment portfolio; and

• provides governance over the investment process for each of our operating companies to ensure consistency of approach and adherence to investment guidelines.

Under our guidance and direction, external asset managers conduct security and sector selection and transaction execution. Use of multiple managers benefits Chubb in several ways – it provides us with operational and cost efficiencies, diversity of styles and approaches, innovations in investment research and credit and risk management, all of which enhance the risk adjusted returns of our portfolios.

ACE Asset Management determines the investment portfolio's allowable, targeted asset allocation and ranges for each of the segments. These asset allocation targets are derived from sophisticated asset and liability modeling that measures correlated histories of returns and volatility of returns. Allowable investment classes are further refined through analysis of our operating environment, including expected volatility of cash flows, potential impact on our capital position, as well as regulatory and rating agency considerations.

The Board has established a Risk & Finance Committee which helps execute the Board's supervisory responsibilities pertaining to enterprise risk management including investment risk. Under the overall supervision of the Risk & Finance Committee, Chubb's governance over investment management is rigorous and ongoing. Among its responsibilities, the Risk & Finance Committee of the Board:

• reviews and approves asset allocation targets and investment policy to ensure that it is consistent with our overall goals, strategies, and objectives;

• reviews and approves investment guidelines to ensure that appropriate levels of portfolio liquidity, credit quality, diversification, and volatility are maintained; and

• systematically reviews the portfolio's exposures including any potential violations of investment guidelines.

We have long-standing global credit limits for our entire portfolio across the organization and for individual obligors. Exposures are aggregated, monitored, and actively managed by our Global Credit Committee, comprising senior executives, including our Chief Financial Officer, our Chief Risk Officer, our Chief Investment Officer, and our Treasurer.

Within the guidelines and asset allocation parameters established by the Risk & Finance Committee, individual investment committees of the segments determine tactical asset allocation. Additionally, these committees review all investment-related activity that affects their operating company, including the selection of outside investment advisors, proposed asset allocation changes, and the systematic review of investment guidelines.

For additional information regarding the investment portfolio, including breakdowns of the sector and maturity distributions, refer to Note 3 to the Consolidated Financial Statements, under Item 8.

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Regulation

Our insurance and reinsurance subsidiaries conduct business globally, including in all 50 states of the United States and the District of Columbia. Our businesses in each of these jurisdictions are subject to varying degrees of regulation and supervision. The laws and regulations of the jurisdictions in which our insurance and reinsurance subsidiaries are domiciled require among other things that these subsidiaries maintain minimum levels of statutory capital, surplus, and liquidity, meet solvency standards, and submit to periodic examinations of their financial condition. The complex regulatory environments in which Chubb operates are subject to change and are regularly monitored.

Group Supervision

In September 2012, pursuant to legislation passed in the state of Pennsylvania, U.S., based on the Model Insurance Holding Company System Regulatory Act (model law) adopted by the National Association of Insurance Commissioners (NAIC), the Pennsylvania Insurance Department (Department), in consultation with other insurance regulatory bodies that oversee Chubb's insurance activities, convened the first Chubb Group Supervisory College (College). Regulators from approximately 15 jurisdictions worldwide were invited to participate in the College, the purpose of which was to initiate establishment of, and to clarify the membership, participation, functionality, and ongoing activities in, the College with respect to group-wide supervision of Chubb. Representatives from approximately ten jurisdictions attended the College in Philadelphia, Pennsylvania, during which the supervisors reviewed, without adverse comment, information on our group governance, risk assessment and management, capital adequacy, and material intercompany transactions. On October 19, 2012, the Department, in cooperation with the other supervisory college regulators, published a notice of its determination that it is the appropriate group-wide supervisor for Chubb.

In September 2014, the Department, in consultation with other insurance regulatory bodies that oversee Chubb's insurance activities, convened the second College. Representatives from approximately ten jurisdictions attended the College in Philadelphia, Pennsylvania, during which the supervisors reviewed, without adverse comment, information on our group governance, compliance, risk assessment and management, and capital adequacy.

The Department has circulated an invitation to various regulators to participate in the third College to be held in Lafayette Hill, Pennsylvania in September 2016.

The following is an overview of regulations for our operations in Switzerland, the U.S., Bermuda, and other international locations.

Swiss Operations

The Swiss Financial Market Supervisory Authority (FINMA) has the discretion to supervise Chubb on a group-wide basis. However, FINMA acknowledges the Department's assumption of group supervision over us.

In 2008, we formed ACE Insurance (Switzerland) Limited which offers property and casualty insurance to Swiss companies, A&H insurance for individuals of Swiss Corporations as well as reinsurance predominantly in Continental Europe. We have also formed a reinsurance subsidiary named ACE Reinsurance (Switzerland) Limited, which we operate as primarily a provider of reinsurance to Chubb entities. Both companies are licensed and governed by FINMA.

U.S. Operations

Our U.S. insurance subsidiaries are subject to extensive regulation and supervision by the states in which they do business. The laws of the various states establish departments of insurance with broad authority to regulate, among other things: the standards of solvency that must be met and maintained, the licensing of insurers and their producers, approval of policy forms and rates, the nature of and limitations on investments, restrictions on the size of the risks which may be insured under a single policy, deposits of securities for the benefit of policyholders, requirements for the acceptability of reinsurers, periodic examinations of the affairs of insurance companies, the form and content of reports of financial condition required to be filed, and the adequacy of reserves for unearned premiums, losses, and other purposes.

Our U.S. insurance subsidiaries are required to file detailed annual and quarterly reports with state insurance regulators. In addition, our U.S. insurance subsidiaries' operations and financial records are subject to examination at regular intervals by state regulators.

All states have enacted legislation that regulates insurance holding companies. This legislation provides that each insurance company in the insurance holding company system (system) is required to register with the insurance department of its state of domicile and furnish information concerning the operations of companies within the system that may materially affect the

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operations, management, or financial condition of the insurers within the system. We are required to file an annual enterprise risk report with the Department, identifying the material risks within our system that could pose enterprise risk to the insurance subsidiaries in the system. All transactions within a system must be fair and equitable. Notice to the insurance departments is required prior to the consummation of transactions affecting the ownership or control of an insurer and of certain material transactions between an insurer and an entity in its system. In addition, certain transactions may not be consummated without the department's prior approval.

We are also required to file an annual summary report with the Department, reflecting our internal assessment of material risks associated with our current business plan and the sufficiency of our capital resources to support those risks.

Statutory surplus is an important measure used by the regulators and rating agencies to assess our U.S. insurance subsidiaries' ability to support business operations and provide dividend capacity. Our U.S. insurance subsidiaries are subject to various state statutory and regulatory restrictions that limit the amount of dividends that may be paid without prior approval from regulatory authorities. These restrictions differ by state, but are generally based on calculations incorporating statutory surplus, statutory net income, and/or investment income.

The NAIC has a risk-based capital requirement for P&C insurance companies. This risk-based capital formula is used by many state regulatory authorities to identify insurance companies that may be undercapitalized and which merit further regulatory attention. These requirements are designed to monitor capital adequacy using a formula that prescribes a series of risk measurements to determine a minimum capital amount for an insurance company, based on the profile of the individual company. The ratio of a company's actual policyholder surplus to its minimum capital requirement will determine whether any state regulatory action is required. There are progressive risk-based capital failure levels that trigger more stringent regulatory action. If an insurer's policyholders' surplus falls below the Mandatory Control Level (70 percent of the Authorized Control Level, as defined by the NAIC), the relevant insurance commissioner is required to place the insurer under regulatory control.

However, an insurance commissioner may allow a P&C company operating below the Mandatory Control Level that is writing no business and is running off its existing business to continue its run-off. Brandywine is running off its liabilities consistent with the terms of an order issued by the Insurance Commissioner of Pennsylvania. This includes periodic reporting obligations to the Department.

Government intervention has also occurred in the insurance and reinsurance markets in relation to terrorism coverage in the U.S. (and through industry initiatives in other countries). The U.S. Terrorism Risk Insurance Act (TRIA), which was enacted in 2002 to ensure the availability of insurance coverage for certain types of terrorist acts in the U.S., was extended in 2015 for six years, through December 31, 2020, and applies to certain of our operations.

From time to time, Chubb and its subsidiaries and affiliates receive inquiries from state agencies and attorneys general, with which we generally comply, seeking information concerning business practices, such as underwriting and non-traditional or loss mitigation insurance products. Moreover, many recent factors, such as consequences of and reactions to industry and economic conditions and focus on domestic issues, have contributed to the potential for change in the legal and regulatory framework applicable to Chubb's U.S. operations and businesses. We cannot assure that changes in laws or investigative or enforcement activities in the various states in the U.S. will not have a material adverse impact on our financial condition, results of operations, or business practices.

Bermuda Operations

The Insurance Act 1978 of Bermuda and related regulations, as amended (the Insurance Act), regulates the insurance business of our Bermuda insurance subsidiaries and provides that no person may carry on any insurance business in or from within Bermuda unless registered as an insurer by the Bermuda Monetary Authority (BMA). The Insurance Act imposes solvency and liquidity standards and auditing and reporting requirements on Bermuda insurance companies and grants the BMA powers to supervise, investigate, and intervene in the affairs of insurance companies. Our Bermuda domiciled insurance subsidiaries must prepare annual statutory financial statements and file them with the BMA, and certain subsidiaries must file audited annual financial statements prepared in accordance with accounting principles generally accepted in the U.S. (GAAP), International Financial Reporting Standards (IFRS), or any such other generally accepted accounting principles as the BMA may recognize. These audited financials are made public by the BMA. The Insurance Act prescribes rules for the preparation and content of the statutory financial statements that require Chubb subsidiaries to give detailed information and analyses regarding premiums, claims, reinsurance, and investments.

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The BMA established risk-based regulatory capital adequacy and solvency margin requirements for Bermuda insurers that mandate that a Class E (long-term business), Class 3A (general business), and Class 4 insurer's Enhanced Capital Requirement (ECR) be calculated by either (a) the BMA model, or (b) an internal capital model which the BMA has approved for use for this purpose. ACE's Bermuda insurance subsidiaries use the BMA model in calculating their solvency requirements.

The risk-based regulatory capital adequacy and solvency margin regime provides a risk-based capital model, termed the Bermuda Solvency Capital Requirement (BSCR), as a tool to assist the BMA both in measuring risk and in determining appropriate levels of capitalization. The BSCR employs a standard mathematical model that correlates the risk underwritten by Bermuda insurers to their capital. The BSCR framework applies a standard measurement format to the risk associated with an insurer's assets, liabilities, and premiums, including a formula to take account of catastrophe risk exposure. In order to minimize the risk of a shortfall in capital arising from an unexpected adverse deviation and in moving towards the implementation of a risk based capital approach, the BMA has established a threshold capital level, (termed the Target Capital Level (TCL)), set at 120 percent of ECR, that serves as an early warning tool for the BMA and failure to maintain statutory capital at least equal to the TCL will likely result in increased BMA regulatory oversight.

Under the Insurance Act, Class 4 insurers are prohibited from declaring or paying any dividends of more than 25 percent of total statutory capital and surplus, as shown in its previous financial year statutory balance sheet, unless at least seven days before payment of the dividends, it files with the BMA an affidavit that it will continue to meet its required solvency margins. In addition, Class 4, 3A, and E insurers must obtain the BMA's prior approval before reducing total statutory capital, as shown in its previous financial year statutory balance sheet, by 15 percent or more. Furthermore, Bermuda insurance subsidiaries may only declare and pay a dividend from retained earnings and a dividend or distribution from contributed surplus if it has no reasonable grounds for believing that it is, or would after the payment be, unable to pay its liabilities as they become due, or if the realizable value of its assets would not be less than the aggregate of its liabilities and its issued share capital and share premium accounts.

During 2015, the European Insurance and Occupational Pensions Authority (EIOPA) completed its review of the BMA’s proposed supervisory regime with respect to Bermuda’s commercial insurers (i.e., those registered as Class 3A, 3B or 4, C, D or E).  EIOPA concluded that the BMA’s proposed supervisory regime was broadly equivalent to the European Union (EU) directive which provides new rules with respect to capital requirements, governance, risk management and disclosure for (re)insurers.  The EU directive is more commonly known as “Solvency II”.  EIOPA’s views on Bermuda’s Solvency II equivalence were formally adopted by the European Commission via a delegated act on November 26, 2015 (subject to a three-month review period by the European Parliament and European Council).  Once the delegated act comes into effect, the BMA’s revised supervisory regime will be effective retroactively to January 1, 2016.  Our Bermuda commercial (re)insurance subsidiaries would submit their first annual filings under the new requirements in 2017.  We do not believe the new regulations will have a material effect on our capital management strategies, results of operations or financial condition.

Other International Operations

The extent of insurance regulation varies significantly among the countries in which non-U.S. Chubb operations conduct business. While each country imposes licensing, solvency, auditing, and financial reporting requirements, the type and extent of the requirements differ substantially. For example:

• in some countries, insurers are required to prepare and file monthly and/or quarterly financial reports, and in others, only annual reports;

• some regulators require intermediaries to be involved in the sale of insurance products, whereas other regulators permit direct sales contact between the insurer and the customer;

• the extent of restrictions imposed upon an insurer's use of local and offshore reinsurance vary;

• policy form filing and rate regulation vary by country;

• the frequency of contact and periodic on-site examinations by insurance authorities differ by country; and

• regulatory requirements relating to insurer dividend policies vary by country.

Significant variations can also be found in the size, structure, and resources of the local regulatory departments that oversee insurance activities. Certain regulators prefer close relationships with all subject insurers and others operate a risk-based approach.

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Chubb operates in some countries through subsidiaries and in some countries through branches of subsidiaries. Local capital requirements applicable to a subsidiary generally include its branches. Certain Chubb companies are jointly owned with local companies to comply with legal requirements for local ownership. Other legal requirements include discretionary licensing procedures, compulsory cessions of reinsurance, local retention of funds and records, data privacy and protection program requirements, and foreign exchange controls. Chubb's international companies are also subject to multinational application of certain U.S. laws.

There are various regulatory bodies and initiatives that impact Chubb in multiple international jurisdictions and the potential for significant impact on Chubb could be heightened as a result of recent industry and economic developments. In particular, the European Union's (EU) executive body, the European Commission, implemented a new capital adequacy and risk management regulations for the European insurance industry, known as Solvency II, which aims to establish a revised set of EU-wide capital requirements and risk management standards that replaced the Solvency I requirements. The Solvency II requirements were effective January 1, 2016 for our European operations.

Under Solvency II, it is possible that a U.S. domiciled parent company of a subsidiary domiciled in the EU could be subject to certain requirements if determined by the regulator that its subsidiary's capital position is dependent on the U.S. parent company that is not subject to requirements deemed to be ''equivalent'' to Solvency II. We do not currently expect that our capital management strategies, results of operations, and financial condition will be materially affected by the Solvency II requirements.

Enterprise Risk Management

As an insurer, Chubb is in the business of profitably managing risk for its customers. Since risk management must permeate an organization conducting a global insurance business, we have an established Enterprise Risk Management (ERM) framework that is integrated into management of our businesses and is led by Chubb's senior management. As a result, ERM is a part of the day-to-day management of Chubb and its operations.

Our global ERM framework is broadly multi-disciplinary and its objectives include:

• External Risks: identify, analyze, quantify, and where possible, mitigate significant external risks that could materially hamper the financial condition of Chubb and/or the achievement of corporate business objectives over the next 36 months;

• Exposure Accumulations: identify and quantify the accumulation of exposure to individual counterparties, products or industry sectors, particularly those that materially extend across or correlate between business units or divisions and/or the balance sheet;

• Risk Modeling: develop and use various data-sets, analytical tools, metrics and processes (including economic capital models and advanced analytics) that help division and corporate leaders make informed underwriting, portfolio management and risk management decisions within a consistent risk/reward framework;

• Governance: establish and coordinate risk guidelines that reflect the corporate appetite for risk, monitor exposure accumulations relative to established guidelines, and ensure effective internal risk management communication up to management and the Board, down to the various business units and legal entities, and across the firm; and

• Disclosure: develop protocols and processes for risk-related disclosure internally as well as externally to rating agencies, regulators, shareholders and analysts.

Chubb Group's Risk and Underwriting Committee (RUC) reports to and assists the Chief Executive Officer in the oversight and review of the ERM framework which covers the processes and guidelines used to manage insurance risk, financial risk, strategic risk, and operational risk. The RUC is chaired by Chubb Group’s 's Chief Risk Officer and Chief Actuary. The RUC meets at least monthly, and is comprised of Chubb Group 's most senior executives, in addition to the Chair, including the Chief Executive Officer, Chief Operating Officer, Chief Financial Officer, Chief Investment Officer, Chief Claims Officer, General Counsel, President – North America Commercial and Personal Insurance, President – North America Major Accounts and Specialty Insurance, and Chief Underwriting Officer.

The RUC is assisted in its activities by Chubb's Enterprise Risk Unit (ERU) and Product Boards. The ERU is responsible for the collation and analysis of risk insight in two key areas. First, external information that provides insight to the RUC on existing or emerging risks that might significantly impact Chubb's key objectives and second, internal risk aggregations arising from Chubb's business writings and other activities such as investments and operations. The ERU is independent of the operating units and reports to our Chief Risk Officer and Chief Actuary. The Product Boards exist to provide oversight for products that we offer globally. A Product Board currently exists for each of Chubb's major product areas. Each Product Board is responsible for

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ensuring consistency in underwriting and pricing standards, identification of emerging issues, and guidelines for relevant accumulations.

Chubb's Chief Risk Officer and Chief Actuary also reports to the Board's Risk & Finance Committee, which helps execute the Board's supervisory responsibilities pertaining to ERM. The role of the Risk & Finance Committee includes evaluation of the integrity and effectiveness of our ERM procedures, systems, and information; governance on major policy decisions pertaining to risk aggregation and minimization; and assessment of our major decisions and preparedness levels pertaining to perceived material risks. The Audit Committee meets annually and on an as needed basis with the Risk & Finance Committee in order to exercise its duties under New York Stock Exchange Rules.

Others within the ERM structure contribute toward accomplishing Chubb's ERM objectives, including regional management, Corporate Underwriting, Internal Audit, Compliance, external consultants, and managers of our internal control processes and procedures.

Tax Matters

Refer to “Risk Factors”, under Item 1A and Note 1 n) and Note 8 to the Consolidated Financial Statements.

EXECUTIVE OFFICERS OF THE REGISTRANT

Name	Age	Position
Evan G. Greenberg	61	Chairman, President, Chief Executive Officer, and Director
John W. Keogh	51	Executive Vice Chairman and Chief Operating Officer; Chairman, Overseas General Insurance
Philip V. Bancroft	56	Executive Vice President and Chief Financial Officer
John J. Lupica	50	Vice Chairman; President, North America Major Accounts & Specialty Insurance
Joseph F. Wayland	58	Executive Vice President and General Counsel
Sean Ringsted	52	Chief Risk Officer and Chief Actuary
Timothy A. Boroughs	66	Chief Investment Officer
Paul J. Krump	56	Executive Vice President; President, North America Commercial and Personal Insurance
Juan C. Andrade	51	Executive Vice President; President, Overseas General Insurance

Evan G. Greenberg has been a director of Chubb Limited since August 2002. Mr. Greenberg was elected Chairman of the Board of Directors in May 2007. Mr. Greenberg became a director of The Coca-Cola Company in February 2011. Mr. Greenberg was appointed to the position of President and Chief Executive Officer of Chubb Limited in May 2004, and in June 2003, was appointed President and Chief Operating Officer of Chubb Limited. Mr. Greenberg was appointed to the position of Chief Executive Officer of ACE Overseas General in April 2002. He joined Chubb as Vice Chairman, Chubb Limited, and Chief Executive Officer of ACE Tempest Re in November 2001. Prior to joining Chubb, Mr. Greenberg was most recently President and Chief Operating Officer of American International Group (AIG), a position he held from 1997 until 2000.

John W. Keogh was appointed Executive Vice Chairman of Chubb Limited in November 2015. Mr. Keogh has served as Chief Operating Officer of Chubb Limited since July 2011 and Vice Chairman of Chubb Limited and ACE Group Holdings since August 2010. Mr. Keogh joined Chubb as Chief Executive Officer of Overseas General Insurance in April 2006 and became Chairman of Overseas General Insurance in August 2010. Prior to joining Chubb, Mr. Keogh served as Senior Vice President, Domestic General Insurance of AIG, and President and Chief Executive Officer of National Union Fire Insurance Company, AIG's member company that specializes in D&O and fiduciary liability coverages. Mr. Keogh joined AIG in 1986. He served in a number of other senior positions there including as Executive Vice President of AIG's Domestic Brokerage Group and as President and Chief Operating Officer of AIG's Lexington Insurance Company unit.  

Philip V. Bancroft was appointed Chief Financial Officer of Chubb Limited in January 2002. For nearly 20 years, Mr. Bancroft worked for PricewaterhouseCoopers LLP. Prior to joining Chubb, he served as partner-in-charge of the New York Regional Insurance Practice. Mr. Bancroft had been a partner with PricewaterhouseCoopers LLP for ten years.

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John J. Lupica was appointed President, North America Major Accounts & Specialty Insurance in January 2016, Vice Chairman of Chubb Limited and ACE Group Holdings in November 2013 and Chairman, Insurance - North America, in July 2011. Mr. Lupica had been Chief Operating Officer, Insurance - North America, since 2010 and President of ACE USA since 2006. He also previously served as Division President of ACE Professional Risk and ACE USA Regional Operations. Mr. Lupica joined ACE USA as Executive Vice President of Professional Risk in 2000. Prior to joining Chubb, he served as Senior Vice President for Munich-American Risk Partners, Inc. He also held various management positions at AIG.

Joseph F. Wayland was appointed Executive Vice President of Chubb Limited in January 2016, General Counsel and Secretary of Chubb Limited in July 2013.  Mr. Wayland joined Chubb from the law firm of Simpson Thacher & Bartlett LLP, where he was a partner since 1994. From 2010 to 2012, he served in the United States Department of Justice, first as Deputy Assistant Attorney General of the Antitrust Division, and was later appointed as the Acting Assistant Attorney General in charge of that division.

Sean Ringsted was appointed Chief Risk Officer and Chief Actuary of Chubb Limited in November 2008. Mr. Ringsted’s previous roles at Chubb include Chief Actuary for Chubb Group from 2004 to 2008, Executive Vice President and Chief Risk Officer for ACE Tempest Re from 2002 to 2004, and Senior Vice President and Chief Actuary for ACE Tempest Re from 1998 to 2002. Prior to joining Chubb, Mr. Ringsted was a consultant at Tillinghast-Towers Perrin.

Timothy A. Boroughs was appointed Chief Investment Officer of Chubb Group in June 2000. Prior to joining Chubb, Mr. Boroughs was Director of Fixed Income at Tudor Investment Corporation from 1997 to 2000, and Managing Partner and Director of Global Leveraged Investment Activity at Fischer Francis Trees & Watts from 1976 to 1997.

Paul J. Krump was appointed Executive Vice President, Chubb Group and President North America Commercial and Personal Insurance in January 2016. Prior to ACE Limited’s January 2016 acquisition of The Chubb Corporation, Mr. Krump was Chief Operating Officer of The Chubb Corporation, responsible for the company’s Commercial, Specialty, Personal and Accident & Health insurance lines; Claims; Global Field Operations; Information Technology; Human Resources; Communications; and External Affairs. Mr. Krump joined The Chubb Corporation in 1982 as a commercial underwriting trainee in the Minneapolis office. He held numerous headquarters and field positions in the United States and Europe, including President of Personal Lines and Claims and President of Commercial and Specialty Lines.

Juan C. Andrade was appointed Executive Vice President, Chubb Group and President, Overseas General Insurance in January 2016. Mr. Andrade joined Chubb in December 2010 to lead the global personal lines and small commercial property & casualty insurance businesses. In January 2013, he became the Chief Operating Officer for Overseas General Insurance. Prior to joining Chubb, Mr. Andrade was President and Chief Operating Officer of property & casualty operations for The Hartford Financial Services Group. He joined The Hartford in 2006 as head of the property & casualty claims organization.

ITEM 1A. Risk Factors

Factors that could have a material impact on our results of operations or financial condition are outlined below. Additional risks not presently known to us or that we currently deem insignificant may also impair our business or results of operations as they become known or as facts and circumstances change. Any of the risks described below could result in a significant or adverse effect on our results of operations or financial condition.

Insurance

Our results of operations or financial condition could be adversely affected by the occurrence of natural and man-made disasters.

We have substantial exposure to losses resulting from natural disasters, man-made catastrophes such as terrorism or cyber-attack, and other catastrophic events, including pandemics. This could impact a variety of our businesses, including our commercial and personal lines, and life and A&H products. Catastrophes can be caused by various events, including hurricanes, typhoons, earthquakes, hailstorms, drought, explosions, severe winter weather, fires, war, acts of terrorism, nuclear accidents, political instability, and other natural or man-made disasters, including a global or other wide-impact pandemic or a significant cyber-attack. The incidence and severity of catastrophes are inherently unpredictable and our losses from catastrophes could be substantial. In addition, climate conditions may be changing, primarily through changes in global temperatures, which may increase the frequency and severity of natural catastrophes and the resulting losses in the future. We cannot predict the impact that changing climate conditions, if any, may have on our results of operations or our financial condition. Additionally, we

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cannot predict how legal, regulatory and/or social responses to concerns around global climate change may impact our business. The occurrence of claims from catastrophic events could result in substantial volatility in our results of operations or financial condition for any fiscal quarter or year. The historical incidence for events such as earthquakes, pandemics and cyber-attacks is infrequent and may not be representative of contemporary exposures and risks. As an example, increases in the values and concentrations of insured property may increase the severity of these occurrences in the future. Although we attempt to manage our exposure to such events through the use of underwriting controls, risk models, and the purchase of third-party reinsurance, catastrophic events are inherently unpredictable and the actual nature of such events when they occur could be more frequent or severe than contemplated in our pricing and risk management expectations. As a result, the occurrence of one or more catastrophic events could have an adverse effect on our results of operations and financial condition.

If actual claims exceed our loss reserves, our financial results could be adversely affected.

Our results of operations and financial condition depend upon our ability to accurately assess the potential losses associated with the risks that we insure and reinsure. We establish reserves for unpaid losses and loss expenses, which are estimates of future payments of reported and unreported claims for losses and related expenses, with respect to insured events that have occurred at or prior to the balance sheet date. The process of establishing reserves can be highly complex and is subject to considerable variability as it requires the use of informed estimates and judgments.

Actuarial staff in each of our segments analyze insurance reserves and regularly evaluate the levels of loss reserves. Any such evaluations could result in future changes in estimates of losses or reinsurance recoverables and would be reflected in our results of operations in the period in which the estimates are changed. Losses and loss expenses are charged to income as incurred. During the loss settlement period, which can be many years in duration for some of our lines of business, additional facts regarding individual claims and trends often will become known which may result in a change in overall reserves. In addition, application of statistical and actuarial methods may require the adjustment of overall reserves upward or downward from time to time.

Included in our loss reserves are liabilities for latent claims such as A&E, which are principally related to claims arising from remediation costs associated with hazardous waste sites and bodily-injury claims related to exposure to asbestos products and environmental hazards. At December 31, 2015, gross A&E liabilities represented approximately 4.2 percent of our loss reserves. The estimation of these liabilities is subject to many complex variables including: the current legal environment; specific settlements that may be used as precedents to settle future claims; assumptions regarding trends with respect to claim severity and the frequency of higher severity claims; assumptions regarding the ability to allocate liability among defendants (including bankruptcy trusts) and other insurers; the ability of a claimant to bring a claim in a state in which they have no residency or exposure; the ability of a policyholder to claim the right to non-products coverage; whether high-level excess policies have the potential to be accessed given the policyholder's claim trends and liability situation; payments to unimpaired claimants; and the potential liability of peripheral defendants. Accordingly, the ultimate settlement of losses, arising from either latent or non-latent causes, may be significantly greater or less than the loss and loss expense reserves held at the balance sheet date. In particular the amount and timing of the settlement of our P&C liabilities are not determinate and our actual payments could be higher than contemplated in our loss reserves owing to the impact of insurance, judicial decisions, and/or social inflation. If our loss reserves are inadequate, we may be required to increase loss reserves at the time of the determination and our net income and capital may be reduced.

The effects of emerging claim and coverage issues on our business are uncertain.

As industry practices and legislative, regulatory, judicial, social, financial, technology and other environmental conditions change, unexpected and unintended issues related to claims and coverage may emerge. These issues may adversely affect our business by either extending coverage beyond our underwriting intent or by increasing the frequency and severity of claims. In some instances, these changes may not become apparent until after we have issued insurance or reinsurance contracts that are affected by the changes. As a result, the full extent of liability under our insurance or reinsurance contracts may not be known for many years after issuance.

The failure of any of the loss limitation methods we use could have an adverse effect on our results of operations and financial condition.

We seek to manage our loss exposure by maintaining a disciplined underwriting process throughout our insurance operations. We also look to limit our loss exposure by writing a number of our insurance and reinsurance contracts on an excess of loss basis. Excess of loss insurance and reinsurance indemnifies the insured against losses in excess of a specified amount. In addition, we limit program size for each client and purchase third-party reinsurance for our own account. In the case of our assumed proportional reinsurance treaties, we seek per occurrence limitations or loss and loss expense ratio caps to limit the impact of losses ceded by the client. In proportional reinsurance, the reinsurer shares a proportional part of the premiums and

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losses of the reinsured. We also seek to limit our loss exposure by geographic diversification. Geographic zone limitations involve significant underwriting judgments, including the determination of the area of the zones and the inclusion of a particular policy within a particular zone's limits.

However, there are inherent limitations in all of these tactics and no assurance can be given that an event or series of events will not result in loss levels that could have an adverse effect on our financial condition or results of operations. It is also possible that losses could manifest themselves in ways that we do not anticipate and that our risk mitigation strategies are not designed to address. Additionally, various provisions of our policies, such as limitations or exclusions from coverage or choice of forum negotiated to limit our risks, may not be enforceable in the manner we intend. As a result, one or more catastrophic or other events could result in claims that substantially exceed our expectations, which could have an adverse effect on our results of operations and financial condition.

We may be unable to purchase reinsurance, and if we successfully purchase reinsurance, we are subject to the possibility of non-payment.

We purchase protection from third parties including, but not limited to, reinsurance to protect against catastrophes and other sources of volatility, to increase the amount of protection we can provide our clients, and as part of our overall risk management strategy. Our reinsurance business also purchases retrocessional protection which allows a reinsurer to cede to another company all or part of the reinsurance originally assumed by the reinsurer. A reinsurer's or retrocessionaire's insolvency or inability or unwillingness to make timely payments under the terms of its reinsurance agreement with us could have an adverse effect on us because we remain liable to the insured. From time to time, market conditions have limited, and in some cases have prevented, insurers and reinsurers from obtaining the types and amounts of reinsurance or retrocessional reinsurance that they consider adequate for their business needs.

There is no guarantee our desired amounts of reinsurance or retrocessional reinsurance will be available in the marketplace in the future. In addition to capacity risk, the remaining capacity may not be on terms we deem appropriate or acceptable or with companies with whom we want to do business. Finally, we face some degree of counterparty risk whenever we purchase reinsurance or retrocessional reinsurance. Consequently, the insolvency, inability, or unwillingness of any of our present or future reinsurers to make timely payments to us under the terms of our reinsurance or retrocessional agreements could have an adverse effect on us. At December 31, 2015, we had $11.4 billion of reinsurance recoverables, net of reserves for uncollectible recoverables.

Certain active Chubb companies are primarily liable for A&E and other exposures they have reinsured to our inactive run-off company Century Indemnity Company (Century). At December 31, 2015, the aggregate reinsurance balances ceded by our active subsidiaries to Century were approximately $1.2 billion. Should Century's loss reserves experience adverse development in the future and should Century be placed into rehabilitation or liquidation, the reinsurance recoverables due from Century to its affiliates would be payable only after the payment in full of third party expenses and liabilities, including administrative expenses and direct policy liabilities. Thus, the intercompany reinsurance recoverables would be at risk to the extent of the shortage of assets remaining to pay these recoverables. While we believe the intercompany reinsurance recoverables from Century are not impaired at this time, we cannot assure that adverse development with respect to Century's loss reserves, if manifested, will not result in Century's insolvency, which could result in our recognizing a loss to the extent of any uncollectible reinsurance from Century. This could have an adverse effect on our results of operations and financial condition.

Our net income may be volatile because certain products sold by our Life business expose us to reserve and fair value liability changes that are directly affected by market and other factors and assumptions.

Our pricing, establishment of reserves for future policy benefits and valuation of life insurance and annuity products, including reinsurance programs, are based upon various assumptions, including but not limited to market changes, interest rates, mortality rates, morbidity rates, and policyholder behavior. The process of establishing reserves for future policy benefits relies on our ability to accurately estimate insured events that have not yet occurred but that are expected to occur in future periods.  Significant deviations in actual experience from assumptions used for pricing and for reserves for future policy benefits could have an adverse effect on the profitability of our products and our business.

Under reinsurance programs covering variable annuity guarantees, we assumed the risk of guaranteed minimum death benefits (GMDB) and guaranteed living benefits (GLB) associated with variable annuity contracts. Our GLB liability includes guaranteed minimum income benefits (GMIB) and guaranteed minimum accumulation benefits (GMAB). We ceased writing this business in 2007. Our net income is directly impacted by changes in the reserves calculated in connection with the reinsurance of GMDB and GLB liabilities. In addition, our net income is directly impacted by the change in the fair value of the GLB liability. Reported liabilities for both GMDB and GLB reinsurance are determined using internal valuation models which require considerable

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judgment and are subject to significant uncertainty. Refer to the “Critical Accounting Estimates – Guaranteed living benefits (GLB) derivatives” under Item 7 and “Quantitative and Qualitative Disclosures about Market Risk – Reinsurance of GMDB and GLB guarantees” under Item 7A for additional information on the assumptions used in this program. We view our variable annuity reinsurance business as having a similar risk profile to that of catastrophe reinsurance, with the probability of long-term economic loss relatively small at the time of pricing. Adverse changes in market factors and policyholder behavior will have an impact on both life underwriting income and net income.

Payment of obligations under surety bonds could have an adverse effect on our results of operations.

The surety business tends to be characterized by infrequent but potentially high severity losses. The majority of our surety obligations are intended to be performance-based guarantees. When losses occur, they may be mitigated, at times, by recovery rights to the customer’s assets, contract payments, collateral and bankruptcy recoveries. We have substantial commercial and construction surety exposure for current and prior customers. In that regard, we have exposures related to surety bonds issued on behalf of companies that have experienced or may experience deterioration in creditworthiness. If the financial condition of these companies were adversely affected by the economy or otherwise, we may experience an increase in filed claims and may incur high severity losses, which could have an adverse effect on our results of operations.

Our exposure to counterparties in various industries, our reliance on brokers, and certain of our policies may subject us to credit risk.

We have exposure to counterparties through reinsurance and in various industries, including banks, hedge funds and other investment vehicles, and derivative transactions that expose us to credit risk in the event our counterparty fails to perform its obligations. We also have exposure to financial institutions in the form of secured and unsecured debt instruments and equity securities.

In accordance with industry practice, we generally pay amounts owed on claims to brokers who, in turn, remit these amounts to the insured or ceding insurer. Although the law is unsettled and depends upon the facts and circumstances of the particular case, in some jurisdictions, if a broker fails to make such a payment, we might remain liable to the insured or ceding insurer for the deficiency. Conversely, in certain jurisdictions, if the brokers do not remit premiums paid for these policies over to us, these premiums might be considered to have been paid and the insured or ceding insurer will no longer be liable to us for those amounts, whether or not we have actually received the premiums from the broker. Consequently, we assume a degree of credit risk associated with brokers with whom we transact business. However, due to the unsettled and fact-specific nature of the law, we are unable to quantify our exposure to this risk. To date, we have not experienced any material losses related to these credit risks.

Under the terms of certain high-deductible policies which we offer, such as workers’ compensation and general liability, our customers are responsible to reimburse us for an agreed-upon dollar amount per claim. In nearly all cases we are required under such policies to pay covered claims first, and then seek reimbursement for amounts within the applicable deductible from our customers. This obligation subjects us to credit risk from these customers. While we generally seek to mitigate this risk through collateral agreements and maintain a provision for uncollectible accounts associated with this credit exposure, an increased inability of customers to reimburse us in this context could have an adverse effect on our financial condition and results of operations. In addition, a lack of credit available to our customers could impact our ability to collateralize this risk to our satisfaction, which in turn, could reduce the amount of high-deductible policies we could offer.

Since we depend on a few brokers for a large portion of our revenues, loss of business provided by any one of them could adversely affect us.

We market our insurance and reinsurance worldwide primarily through independent insurance agents and insurance and reinsurance brokers. Accordingly, our business is dependent on the willingness of these agents and brokers to recommend our products to their customers, who may also promote and distribute the products of our competitors. Deterioration in relationships with our agent and broker distribution network or their increased promotion and distribution of our competitors' products could adversely affect our ability to sell our products. Loss of all or a substantial portion of the business provided by one or more of these brokers could have an adverse effect on our business.

Financial

Our investment performance may affect our financial results and ability to conduct business.

Our investment assets are invested by professional investment management firms under the direction of our management team in accordance with investment guidelines approved by the Risk & Finance Committee of the Board of Directors. Although our investment guidelines stress diversification of risks and conservation of principal and liquidity, our investments are subject to market risks and risks inherent in individual securities. Interest rates are highly sensitive to many factors, including inflation,

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monetary and fiscal policies, and domestic and international political conditions. The volatility of our losses may force us to liquidate securities, which may cause us to incur capital losses. Realized and unrealized losses in our investment portfolio would reduce our book value, and if significant, can affect our ability to conduct business.

Volatility in interest rates could impact the performance of our investment portfolio which could have an adverse effect on our investment income and operating results. Although we take measures to manage the risks of investing in a changing interest rate environment, we may not be able to effectively mitigate interest rate sensitivity. Our mitigation efforts include maintaining a high quality portfolio of primarily fixed income investments with a relatively short duration to reduce the effect of interest rate changes on book value. A significant increase in interest rates would generally have an adverse effect on our book value. Our life insurance investments typically focus on longer duration bonds to better match the obligations of this business. For the life business, policyholder behavior may be influenced by changing interest rate conditions and require a rebalancing of duration to effectively manage our asset/liability position.

Our fixed income portfolio is primarily invested in high quality, investment-grade securities. A smaller portion of the portfolio, approximately 11 percentat December 31, 2015, is invested in below investment-grade securities. These securities, which pay a higher rate of interest, also have a higher degree of credit or default risk and may also be less liquid in times of economic weakness or market disruptions. While we have put in place procedures to monitor the credit risk and liquidity of our invested assets, it is possible that, in periods of economic weakness (such as recession), we may experience credit or default losses in our portfolio, which could adversely affect our results of operations and financial condition.

As a part of our ongoing analysis of our investment portfolio, we are required to assess whether the debt and equity securities we hold for which we have recorded an unrealized loss have been “other-than-temporarily impaired” under GAAP, which implies an inability to recover the full economic benefits of these securities. Refer to Note 3 to the Consolidated Financial Statements for additional information. This analysis requires a high degree of judgment and requires us to make certain assessments about the potential for recovery of the assets we hold. Declines in relevant stock and other financial markets, and other factors impacting the value of our investments, could result in impairments and could adversely affect our net income and other financial results.

We may require additional capital or financing sources in the future, which may not be available or may be available only on unfavorable terms.

Our future capital and financing requirements depend on many factors, including our ability to write new business successfully and to establish premium rates and reserves at levels sufficient to cover losses, as well as our investment performance and capital expenditure obligations, including with respect to acquisitions. We may need to raise additional funds through financings or access funds through existing or new credit facilities or through short-term repurchase agreements. We also from time to time seek to refinance debt or credit as amounts become due or commitments expire. Any equity or debt financing or refinancing, if available at all, may be on terms that are not favorable to us. In the case of equity financings, dilution to our shareholders could result, and in any case, such securities may have rights, preferences, and privileges that are senior to those of our Common Shares. Our access to funds under existing credit facilities is dependent on the ability of the banks that are parties to the facilities to meet their funding commitments. If we cannot obtain adequate capital or sources of credit on favorable terms, or at all, we could be forced to use assets otherwise available for our business operations, and our business, results of operations, and financial condition could be adversely affected.

We may be required to post additional collateral because of changes in our reinsurance liabilities to regulated insurance companies, or because of regulatory changes that affect our companies.

If our reinsurance liabilities increase, including in our property & casualty and variable annuity reinsurance businesses, we may be required to post additional collateral for insurance company clients. In addition, regulatory changes sometimes affect our obligations to post collateral. The need to post this additional collateral, if significant enough, may require us to sell investments at a loss in order to provide securities of suitable credit quality or otherwise secure adequate capital at an unattractive cost. This could adversely impact our net income and liquidity and capital resources.

U.S. and global economic and financial industry events and their consequences could harm our business, our liquidity and financial condition, and our stock price.

The consequences of adverse global or regional market and economic conditions may affect (among other aspects of our business) the demand for and claims made under our products, the ability of customers, counterparties, and others to establish or maintain their relationships with us, our ability to access and efficiently use internal and external capital resources, the availability of reinsurance protection, the risks we assume under reinsurance programs covering variable annuity guarantees, and our investment performance. Volatility in the U.S. and other securities markets may adversely affect our stock price.

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A decline in our financial strength ratings could affect our standing among brokers and customers and cause our premiums and earnings to decrease. A decline in our debt ratings could increase our borrowing costs and impact our ability to access capital markets.

Ratings are an important factor in establishing the competitive position of insurance and reinsurance companies. The objective of these rating systems is to provide an opinion of an insurer's financial strength and ability to meet ongoing obligations to its policyholders. A ratings downgrade could result in a substantial loss of business as insureds, ceding companies, and brokers move to other insurers and reinsurers with higher ratings. If one or more of our debt ratings were downgraded, we could also incur higher borrowing costs, and our ability to access the capital markets could be impacted. Additionally, we could be required to post collateral or be faced with the cancellation of policies and resulting premium in certain circumstances. We cannot give any assurance regarding whether or to what extent any of the rating agencies may downgrade our ratings in the future.

Our ability to pay dividends and to make payments on indebtedness may be constrained by our holding company structure.

Chubb Limited is a holding company and does not have any significant operations or assets other than its ownership of the shares of its operating insurance and reinsurance subsidiaries. Dividends and other permitted distributions from our insurance subsidiaries are our primary source of funds to meet ongoing cash requirements, including any future debt service payments and other expenses, and to pay dividends to our shareholders. Some of our insurance subsidiaries are subject to significant regulatory restrictions limiting their ability to declare and pay dividends. The inability of our insurance subsidiaries to pay dividends in an amount sufficient to enable us to meet our cash requirements at the holding company level could have an adverse effect on our operations and our ability to pay dividends to our shareholders and/or meet our debt service obligations.

Our operating results and shareholders' equity may be adversely affected by currency fluctuations.

Our reporting currency is the U.S. dollar. In general, we match assets and liabilities in local currencies. Where possible, capital levels in local currencies are limited to satisfy minimum regulatory requirements and to support local insurance operations. The principal currencies creating foreign exchange risk are the British pound sterling, the euro, the Mexican peso, the Brazilian real, the Korean won, the Canadian dollar, the yen, the Thailand baht, and the Australian dollar. At December 31, 2015, approximately 23.6 percent of our net assets were denominated in foreign currencies. We may experience losses resulting from fluctuations in the values of non-U.S. currencies, which could adversely impact our results of operations and financial condition.

Operational

The regulatory and political regimes under which we operate, and their volatility, could have an adverse effect on our business.

Our insurance and reinsurance subsidiaries conduct business globally. Our businesses in each jurisdiction are subject to varying degrees of regulation and supervision. The laws and regulations of the jurisdictions in which our insurance and reinsurance subsidiaries are domiciled require, among other things, maintenance of minimum levels of statutory capital, surplus, and liquidity; various solvency standards; and periodic examinations of subsidiaries' financial condition. In some jurisdictions, laws and regulations also restrict payments of dividends and reductions of capital. Applicable statutes, regulations, and policies may also restrict the ability of these subsidiaries to write insurance and reinsurance policies, to make certain investments, and to distribute funds. The purpose of insurance laws and regulations generally is to protect policyholders and ceding insurance companies, not our shareholders. For example, some jurisdictions have enacted various consumer protection laws that make it more burdensome for insurance companies to sell policies and interact with customers in personal lines businesses. Failure to comply with such regulations can lead to significant penalties and reputational injury. Fines and penalties in the U.S. in particular have been trending upwards.

The foreign and U.S. federal and state laws and regulations that are applicable to our operations are complex and may increase the costs of regulatory compliance or subject our business to the possibility of regulatory actions or proceedings. Laws and regulations not specifically related to the insurance industry include trade sanctions that relate to certain countries, anti-money laundering laws, and anti-corruption laws such as the U.S. Foreign Corrupt Practices Act, the U.K. Bribery Act 2010, the anti-bribery provisions of the Swiss Penal Code and similar local laws prohibiting corrupt payments to governmental officials. The insurance industry is also affected by political, judicial, and legal developments that may create new and expanded regulations and theories of liability. The current economic climate and the recent financial crisis present additional uncertainties and risks relating to increased regulation and the potential for increased involvement of the U.S. and other governments in the financial services industry.

In addition, various legislative initiatives may impact the conduct of our business.

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Regulators in countries where we have operations are working with the International Association of Insurance Supervisors (IAIS) to consider changes to insurance company supervision, including with respect to group supervision and solvency requirements. The IAIS is developing a common framework to supervise internationally active insurance groups, such as Chubb, known as Com Frame. As part of Com Frame, the IAIS has announced plans to develop an international capital standard for insurance groups. The details of Com Frame including this global capital standard and its applicability to Chubb are uncertain at this time. In addition, the European Union (EU) has implemented a new capital and risk management regime known as Solvency II that applies to our businesses across the EU, which became effective January 1, 2016. Chubb businesses are also subject to the requirements of the Swiss Financial Market Supervisory Authority (FINMA) whose regulations include Swiss Solvency Tests. There are also Risk Based Capital Requirements in the U.S. which are also subject to revision in response to global developments. While it is not certain how or if these actions will impact Chubb, we do not currently expect that our capital management strategies, results of operations and financial condition will be materially affected by these regulatory changes.

In the event or absence of changes in applicable laws and regulations in particular jurisdictions, we may from time to time face challenges, or changes in approach to oversight of our business from insurance or other regulators, including challenges resulting from requiring the use of information technology that cannot be quickly adjusted to address new regulatory requirements.

We may not be able to comply fully with, or obtain appropriate exemptions from, applicable statutes and regulations and any changes thereto, which could have an adverse effect on our business. Failure to comply with or to obtain appropriate authorizations and/or exemptions under any applicable laws and regulations could result in restrictions on our ability to do business or undertake activities that are regulated in one or more of the jurisdictions in which we conduct business and could subject us to fines and other sanctions.

Our worldwide operations, particularly in developing nations expose us to global geopolitical developments that could have an adverse effect on our business, liquidity, results of operations, and financial condition.

With operations in 54 countries, we provide insurance and reinsurance products and services to a diverse group of clients worldwide, including operations in various developing nations. Both current and future foreign operations could be adversely affected by unfavorable geopolitical developments including law changes, tax changes, regulatory restrictions, government leadership changes, political events and upheaval, sociopolitical instability, and nationalization of our operations without compensation. Adverse activity in any one country could negatively impact operations, increase our loss exposure under certain of our insurance products, and could, otherwise, have an adverse effect on our business, liquidity, results of operations, and financial condition depending on the magnitude of the events and our net financial exposure at that time in that country.

A failure in our operational systems or infrastructure or those of third parties, including due to security breaches or cyber-attacks, could disrupt business, damage our reputation, and cause losses.

Our operations rely on the secure processing, storage, and transmission of confidential and other information and assets, including in our computer systems and networks and those of third-party service providers. Our business depends on effective information security and systems and the integrity and timeliness of the data our information systems use to run our business. Our ability to adequately price products and services, to establish reserves, to provide effective, efficient and secure service to our customers, to value our investments and to timely and accurately report our financial results also depends significantly on the integrity and availability of the data we maintain, including that within our information systems, as well as data in and assets held through third-party service providers and systems. In an effort to ensure the integrity of such data, we implement new security measures and systems, including the use of confidential intellectual property, and improve or upgrade our existing security measures and systems on a continuing basis. Although we have implemented administrative and technical controls and take protective actions to reduce the risk of cyber incidents and to protect our information technology and assets, and we endeavor to modify such procedures as circumstances warrant and negotiate agreements with third-party providers to protect our assets, such measures may be insufficient to prevent unauthorized access, computer viruses, malware or other malicious code or cyber-attack, catastrophic events, system failures and disruptions (including in relation to new security measures and systems), employee errors or malfeasance, third party (including outsourced service providers) errors or malfeasance, loss of assets and other events that could have security consequences (each, a Security Event). In some cases, such events may not be immediately detected. As the breadth and complexity of our security infrastructure continues to grow, the potential risk of a Security Event increases. Like other global companies, we have from time to time experienced Security Events, none of which had, individually or in the aggregate, an adverse impact on our business, results of operations, or financial condition. If additional Security Events occur, these events may jeopardize Chubb's or its clients' or counterparties' confidential and other information processed and stored within Chubb, and transmitted through its computer systems and networks, or otherwise cause interruptions, delays, or malfunctions in Chubb's, its clients', its counterparties', or third parties' operations, or result in data loss or loss of assets which could result in significant losses, reputational damage or an adverse effect on our operations and critical business functions. Chubb may be required to expend significant additional resources to modify our protective

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measures or to investigate and remediate vulnerabilities or other exposures and to pursue recovery of lost data or assets and we may be subject to litigation and financial losses that are either not insured against or not fully covered by insurance maintained.

The regulatory environment surrounding information security and privacy is increasingly demanding. We are subject to numerous U.S. federal and state laws and regulations in jurisdictions outside the U.S. governing the protection of personal and confidential information of our clients or employees, including in relation to medical records, credit card data and financial information. These laws and regulations are increasing in complexity and number, change frequently and sometimes conflict. If any person, including any of our employees or those with whom we share such information, negligently disregards or intentionally breaches our established controls with respect to our client data, or otherwise mismanages or misappropriates that data, we could be subject to significant monetary damages, regulatory enforcement actions, fines and/or criminal prosecution in one or more jurisdictions.

Despite the contingency plans and facilities we have in place and our efforts to observe the regulatory requirements surrounding information security, our ability to conduct business may be adversely affected by a disruption of the infrastructure that supports our business in the communities in which we are located, or of outsourced services or functions. This may include a disruption involving electrical, communications, transportation, or other services used by Chubb. If a disruption occurs in one location and Chubb employees in that location are unable to occupy our offices and conduct business or communicate with or travel to other locations, our ability to service and interact with clients may suffer and we may not be able to successfully implement contingency plans that depend on communication or travel.

We use analytical models to assist our decision making in key areas such as underwriting, claims, reserving, and catastrophe risks but actual results could differ materially from the model outputs and related analyses.

We use various modeling techniques (e.g., scenarios, predictive, stochastic and/or forecasting) and data analytics to analyze and estimate exposures, loss trends and other risks associated with our assets and liabilities. We use the modeled outputs and related analyses to assist us in decision-making (e.g., underwriting, pricing, claims, reserving, reinsurance, and catastrophe risk) and to maintain competitive advantage. The modeled outputs and related analyses are subject to various assumptions, uncertainties, model errors and the inherent limitations of any statistical analysis, including the use of historical internal and industry data. In addition, the modeled outputs and related analyses may from time to time contain inaccuracies, perhaps in material respects, including as a result of inaccurate inputs or applications thereof. Consequently, actual results may differ materially from our modeled results. If, based upon these models or other factors, we misprice our products or underestimate the frequency and/or severity of loss events, or overestimate the risks we are exposed to, new business growth and retention of our existing business may be adversely affected which could have an adverse effect on our results of operations and financial condition.

We could be adversely affected by the loss of one or more key executives or by an inability to attract and retain qualified personnel.

Our success depends on our ability to retain the services of our existing key executives and to attract and retain additional qualified personnel in the future. The loss of the services of any of our key executives or the inability to hire and retain other highly qualified personnel in the future could adversely affect our ability to conduct or grow our business. This risk may be particularly acute for us relative to some of our competitors because some of our senior executives work in countries where they are not citizens and work permit and immigration issues could adversely affect the ability to retain or hire key persons. We do not maintain key person life insurance policies with respect to our employees.

Employee error and misconduct may be difficult to detect and prevent and could adversely affect our business, results of operations, and financial condition.

Losses may result from, among other things, fraud, errors, failure to document transactions properly, failure to obtain proper internal authorization, failure to comply with underwriting or other internal guidelines, or failure to comply with regulatory requirements. It is not always possible to deter or prevent employee misconduct and the precautions that we take to prevent and detect this activity may not be effective in all cases. Resultant losses could adversely affect our business, results of operations, and financial condition.

Strategic

Competition in the insurance and reinsurance markets could reduce our margins.

Insurance and reinsurance markets are highly competitive. We compete on an international and regional basiswith major U.S., Bermuda, European, and other international insurers and reinsurers and with underwriting syndicates, some of which have greater financial, marketing, and management resources than we do. We also compete with new companies that continue to be formed to enter the insurance and reinsurance markets. In addition, capital market participants have created alternative

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products that are intended to compete with reinsurance products. Increased competition could result in fewer submissions, lower premium rates, and less favorable policy terms and conditions, which could reduce our profit margins and adversely impact our net income and book value.

Insurance and reinsurance markets are historically cyclical, and we expect to experience periods with excess underwriting capacity and unfavorable premium rates.

The insurance and reinsurance markets have historically been cyclical, characterized by periods of intense price competition due to excessive underwriting capacity as well as periods when shortages of capacity permitted favorable premium levels. An increase in premium levels is often offset by an increasing supply of insurance and reinsurance capacity, either by capital provided by new entrants or by the commitment of additional capital by existing insurers or reinsurers, which may cause prices to decrease. Any of these factors could lead to a significant reduction in premium rates, less favorable policy terms, and fewer submissions for our underwriting services. In addition to these considerations, changes in the frequency and severity of losses suffered by insureds and insurers may affect the cycles of the insurance and reinsurance markets significantly, as could periods of economic weakness (such as recession).

The integration of acquired companies may not be as successful as we anticipate.

Acquisitions, such as our acquisition of The Chubb Corporation (Chubb Corporation) through a merger (the Chubb acquisition), involve numerous operational, strategic, financial, accounting, legal, tax, and other risks; potential liabilities associated with the acquired businesses; and uncertainties related to design, operation and integration of acquired businesses’ internal controls over financial reporting. Difficulties in integrating an acquired company, along with its personnel, may result in the acquired company performing differently than we expected, in operational challenges or in our failure to realize anticipated expense-related efficiencies. Our existing businesses could also be negatively impacted by acquisitions. In addition, goodwill and intangible assets recorded in connection with insurance company acquisitions may be impaired if premium growth, underwriting profitability, agency retention and policy persistency, among other factors, differ from expectations.

There is also the potential that proposed acquisitions that have been publicly announced will not be consummated, even if a definitive agreement has been signed by the parties. If an agreement is terminated before closing, the result would be that our proposed acquisition would not occur, which could, among other things, expose us to damages or liability and adversely impact our stock price and future operations.

We may be subject to U.S. tax and Bermuda tax which may have an adverse effect on our results of operations and shareholder investment.

Chubb Limited and our non-U.S. subsidiaries operate in a manner so that none of these companies should be subject to U.S. tax (other than U.S. excise tax on insurance and reinsurance premium income attributable to insuring or reinsuring U.S. risks and U.S. withholding tax on some types of U.S. source investment income), because none of these companies should be treated as engaged in a trade or business within the U.S. However, because there is considerable uncertainty as to the activities that constitute being engaged in a trade or business within the U.S., we cannot be certain that the Internal Revenue Service (IRS) will not contend successfully that Chubb Limited or its non-U.S. subsidiaries are engaged in a trade or business in the U.S. If Chubb Limited or any of its non-U.S. subsidiaries were considered to be engaged in a trade or business in the U.S., such entity could be subject to U.S. corporate income and branch profits taxes on the portion of its earnings effectively connected to such U.S. business, in which case our results of operations and our shareholders' investments could be adversely affected.

The Bermuda Minister of Finance, under the Exempted Undertakings Tax Protection Act 1966 of Bermuda, as amended, has given Chubb Limited and its Bermuda insurance subsidiaries a written assurance that if any legislation is enacted in Bermuda that would impose tax computed on profits or income, or computed on any capital asset, gain, or appreciation, or any tax in the nature of estate duty or inheritance tax, then the imposition of any such tax would not be applicable to those companies or any of their respective operations, shares, debentures, or other obligations until March 31, 2035, except insofar as such tax would apply to persons ordinarily resident in Bermuda or is payable by us in respect of real property owned or leased by us in Bermuda. We cannot be certain that we will not be subject to any Bermuda tax after March 31, 2035.

The Organization for Economic Cooperation and Development (OECD) and the European Union (EU) are considering measures that might encourage countries to increase our taxes.

The OECD has published an action plan to address base erosion and profit shifting (BEPS) impacting its member countries and other jurisdictions. It is possible that jurisdictions in which we do business could react to the BEPS initiative or their own concerns by enacting tax legislation that could adversely affect us or our shareholders.

A number of multilateral organizations, including the EU and the OECD have, in recent years, expressed concern about some countries not participating in adequate tax information exchange arrangements and have threatened those that do not agree to

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cooperate with punitive sanctions by member countries. It is as yet unclear what all of these sanctions might be, which countries might adopt them, and when or if they might be imposed. We cannot assure, however, that the Tax Information Exchange Agreements (TIEAs) that have been or will be entered into by Switzerland and Bermuda will be sufficient to preclude all of the sanctions described above, which, if ultimately adopted, could adversely affect us or our shareholders.

Shareholders

There are provisions in our charter documents that may reduce the voting rights and diminish the value of our Common Shares.

Our Articles of Association generally provide that shareholders have one vote for each Common Share held by them and are entitled to vote at all meetings of shareholders. However, the voting rights exercisable by a shareholder may be limited so that certain persons or groups are not deemed to hold 10 percent or more of the voting power conferred by our Common Shares. Moreover, these provisions could have the effect of reducing the voting power of some shareholders who would not otherwise be subject to the limitation by virtue of their direct share ownership. Our Board of Directors may refuse to register holders of shares as shareholders with voting rights based on certain grounds, including if the holder would, directly or indirectly, formally, constructively or beneficially own (as described in Articles 8 and 14 of our Articles of Association) or otherwise control voting rights with respect to 10 percent or more of the registered share capital recorded in the commercial register. In addition, the Board of Directors shall reject entry of holders of registered shares as shareholders with voting rights in the share register or shall decide on their deregistration when the acquirer or shareholder upon request does not expressly state that she/he has acquired or holds the shares in her/his own name and for her/his account.

Applicable laws may make it difficult to effect a change of control of our company.

Before a person can acquire control of a U.S. insurance company, prior written approval must be obtained from the insurance commissioner of the state where the domestic insurer is domiciled. Prior to granting approval of an application to acquire control of a domestic insurer, the state insurance commissioner will consider such factors as the financial strength of the applicant, the integrity and management of the applicant's Board of Directors and executive officers, the acquirer's plans for the future operations of the domestic insurer, and any anti-competitive results that may arise from the consummation of the acquisition of control. Generally, state statutes provide that control over a domestic insurer is presumed to exist if any person, directly or indirectly, owns, controls, holds with the power to vote, or holds proxies representing 10 percent or more of the voting securities of the domestic insurer. Because a person acquiring 10 percent or more of our Common Shares would indirectly control the same percentage of the stock of our U.S. insurance subsidiaries, the insurance change of control laws of various U.S. jurisdictions would likely apply to such a transaction. Laws of other jurisdictions in which one or more of our existing subsidiaries are, or a future subsidiary may be, organized or domiciled may contain similar restrictions on the acquisition of control of Chubb.

While our Articles of Association limit the voting power of any shareholder to less than 10 percent, we cannot assure that the applicable regulatory body would agree that a shareholder who owned 10 percent or more of our Common Shares did not, because of the limitation on the voting power of such shares, control the applicable insurance subsidiary.

These laws may discourage potential acquisition proposals and may delay, deter, or prevent a change of control of Chubb, including transactions that some or all of our shareholders might consider to be desirable.

Shareholder voting requirements under Swiss law may limit our flexibility with respect to certain aspects of capital management.

Swiss law allows our shareholders to authorize share capital which can be issued by the Board of Directors without shareholder approval but this authorization must be renewed by the shareholders every two years. Swiss law also does not provide as much flexibility in the various terms that can attach to different classes of stock as permitted in other jurisdictions. Swiss law also reserves for approval by shareholders many corporate actions over which the Board of Directors had authority prior to our redomestication to Switzerland. For example, dividends must be approved by shareholders. While we do not believe that Swiss law requirements relating to our capital management will have an adverse effect on Chubb, we cannot assure that situations will not arise where such flexibility would have provided substantial benefits to our shareholders.

Chubb Limited is a Swiss company; it may be difficult to enforce judgments against it or its directors and executive officers.

Chubb Limited is incorporated pursuant to the laws of Switzerland. In addition, certain of our directors and officers reside outside the U.S. and all or a substantial portion of our assets and the assets of such persons are located in jurisdictions outside the U.S. As such, it may be difficult or impossible to effect service of process within the U.S. upon those persons or to recover against us or them on judgments of U.S. courts, including judgments predicated upon civil liability provisions of the U.S. federal securities laws.

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Chubb has been advised by its Swiss counsel that there is doubt as to whether the courts in Switzerland would enforce:

• judgments of U.S. courts based upon the civil liability provisions of the U.S. federal securities laws obtained in actions against it or its directors and officers, who reside outside the U.S.; or

• original actions brought in Switzerland against these persons or Chubb predicated solely upon U.S. federal securities laws.

Chubb has also been advised by its Swiss counsel that there is no treaty in effect between the U.S. and Switzerland providing for this enforcement and there are grounds upon which Swiss courts may not enforce judgments of U.S. courts. Some remedies available under the laws of U.S. jurisdictions, including some remedies available under the U.S. federal securities laws, would not be allowed in Swiss courts as contrary to that nation's public policy.

Under Swiss law, if we need to raise equity capital at a time when our share price is below the par value of our shares, the equity issuance could be delayed by the need to obtain shareholder approval, which cannot be assured.

As of December 31, 2015, the par value of our Common Shares is CHF 24.15 per share. Under Swiss law, we generally may not issue registered shares below their par value. In the event there is a need to raise common equity capital at a time when the trading price of our registered shares is below our par value, we will need to obtain approval of our shareholders to decrease the par value of our registered shares. We cannot assure that we would be able to obtain such shareholder approval. Furthermore, obtaining shareholder approval would require filing a preliminary proxy statement with the SEC and convening a meeting of shareholders which would delay any capital raising plans. Furthermore, any reduction in par value would decrease our ability to pay dividends as a repayment of share capital which is not subject to Swiss withholding tax. See “Shareholders may be subject to Swiss withholding taxes on the payment of dividends” for additional information.

Shareholders may be subject to Swiss withholding taxes on the payment of dividends.

Our dividends are generally subject to a Swiss withholding tax at a rate of 35 percent; however, payment of a dividend in the form of a par value reduction or qualifying capital contribution reserves reduction is not subject to Swiss withholding tax. We have previously obtained shareholder approval for dividends to be paid in such form. We currently intend to recommend to shareholders that they annually approve the payment of dividends in such form but we cannot assure that our shareholders will continue to approve a reduction in such form each year or that we will be able to meet the other legal requirements for a reduction in par value, or that Swiss withholding tax rules will not be changed in the future. We estimate we would be able to pay dividends in such form, and thus exempt from Swiss withholding tax until 2028–2033. This range may vary depending upon changes in annual dividends, special dividends, fluctuations in U.S. dollar/Swiss franc exchange rates, changes in par value or qualifying capital contribution reserves or changes or new interpretations to Swiss corporate or tax law or regulations.

Under certain circumstances, U. S. shareholders may be subject to adverse U.S. federal income tax consequences.

Under certain circumstances, a U.S. person who owns 10 percent or more of the voting power of a foreign corporation that is a “controlled foreign corporation” (CFC) (a foreign corporation in which 10 percent U.S. shareholders own more than 50 percent of the voting power or value of the stock of a foreign corporation or more than 25 percent of certain foreign insurance corporations) for an uninterrupted period of 30 days or more during a taxable year must include in gross income for U.S. federal income tax purposes such "10 percent U.S. Shareholder's" pro rata share of the CFC's "subpart F income". We believe that because of the dispersion of our share ownership, provisions in our organizational documents that limit voting power, and other factors, no U.S. person who acquires shares of Chubb Limited directly or indirectly through one or more foreign entities should be required to include any subpart F income in income under the CFC rules of U.S. tax law. It is possible, however, that the IRS could challenge the effectiveness of these provisions and that a court could sustain such a challenge, in which case a U.S. person's investment in 10 percent or more of Chubb Limited's stock could be adversely affected.

Separately, any U.S. persons who hold shares may be subject to U.S. federal income taxation at ordinary income tax rates on their proportionate share of our Related Person Insurance Income (RPII). If the RPII of any of our non-U.S. insurance subsidiaries (each a "Non-U.S. Insurance Subsidiary") were to equal or exceed 20 percent of that company's gross insurance income in any taxable year and direct or indirect insureds (and persons related to those insureds) own directly or indirectly through foreign entities 20 percent or more of the voting power or value of Chubb Limited, then a U.S. person who owns any shares of Chubb Limited (directly or indirectly through foreign entities) on the last day of the taxable year would be required to include in his or her income for U.S. federal income tax purposes such person's pro rata share of such company's RPII for the entire taxable year. In addition, any RPII that is includible in the income of a U.S. tax-exempt organization may be treated as unrelated business taxable income. We believe that the gross RPII of each Non-U.S. Insurance Subsidiary did not in prior years of operation and is not expected in the foreseeable future to equal or exceed 20 percent of each such company's gross insurance income. Likewise, we do not expect the direct or indirect insureds of each Non-U.S. Insurance Subsidiary (and persons related to such insureds) to directly or indirectly own 20 percent or more of either the voting power or value of our shares. However, we

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cannot be certain that this will be the case because some of the factors which determine the extent of RPII may be beyond our control. If these thresholds are met or exceeded, any U.S. person’s investment in Chubb Limited could be adversely affected.

A U.S. tax-exempt organization may recognize unrelated business taxable income if a portion of our insurance income is allocated to the organization. This generally would be the case if either we are a CFC and the tax-exempt shareholder is a 10 percent U.S. shareholder or there is RPII, certain exceptions do not apply, and the tax-exempt organization, directly or indirectly through foreign entities, owns any shares of Chubb Limited. Although we do not believe that any U.S. tax-exempt organization should be allocated such insurance income, we cannot be certain that this will be the case. Potential U.S. tax-exempt investors are advised to consult their tax advisors.

U.S. persons who hold shares will be subject to adverse tax consequences if we are considered to be a Passive Foreign Investment Company (PFIC) for U.S. federal income tax purposes.

If Chubb Limited is considered a PFIC for U.S. federal income tax purposes, a U.S. person who holds Chubb Limited shares will be subject to adverse U.S. federal income tax consequences in which case their investment could be adversely affected. In addition, if Chubb Limited were considered a PFIC, upon the death of any U.S. individual owning shares, such individual's heirs or estate would not be entitled to a "step-up" in the basis of the shares which might otherwise be available under U.S. federal income tax laws. We believe that we are not, have not been, and currently do not expect to become, a PFIC for U.S. federal income tax purposes. We cannot assure, however, that we will not be deemed a PFIC by the IRS. The IRS issued proposed regulations regarding the application of the PFIC provisions to an insurance company, and final regulations or pronouncements interpreting or clarifying these rules may be forthcoming. We cannot predict what impact, if any, such guidance would have on an investor that is subject to U.S. federal income taxation.

Changes in tax law could adversely affect an investment in our shares.

Legislation is periodically introduced in the U.S. Congress intended to eliminate some perceived tax advantages of companies (including insurance companies) that have legal domiciles outside the U.S. but have certain U.S. connections. It is possible that such legislation or other legislation could be enacted in the future that could have an adverse impact on us or our shareholders.

Similarly, jurisdictions outside the U.S. in which we do business could enact tax legislation in the future that could have an adverse impact on us or our shareholders. For example, Switzerland is currently considering corporate tax reform measures that could adversely affect us or our shareholders.

Risks Relating to the Chubb Acquisition

We have incurred, and will continue to incur, significant integration-related costs in connection with the Chubb Acquisition.

We have incurred and will continue to incur substantial expenses in connection with the Chubb acquisition.

We expect to continue to incur a number of non-recurring costs associated with combining the operations of the two companies and achieving desired synergies. These fees and costs have been, and will continue to be, substantial. These non-recurring expenses will include, among others, severance and benefit costs, employee retention costs, filing fees, and legal and professional fees.

We also will incur fees and costs related to formulating and implementing integration plans, including facilities and systems consolidation costs and employment-related costs. We continue to assess the magnitude of these costs, and additional unanticipated costs may be incurred as of a result of the Chubb acquisition and the integration of the two companies’ businesses. Although we expect that the elimination of duplicative costs, as well as the realization of other efficiencies related to the integration of the businesses, should allow us company to offset integration-related costs over time, this net benefit may not be achieved in the near term, or at all.

These costs described above, as well as other unanticipated costs and expenses, could have an adverse effect on our financial condition and results of operations.

We may fail to realize all of the anticipated benefits of the Chubb Acquisition.

The success of the Chubb acquisition will depend, in part, on our ability to realize the anticipated benefits and cost savings from combining our businesses. The anticipated benefits and cost savings of the Chubb acquisition may not be realized fully or at all, or may take longer to realize than expected or could have other adverse effects that we do not currently foresee. Some of the assumptions that we have made, such as the achievement of operating synergies, may not be realized. The integration process may result in the loss of key employees from both legacy ACE and Chubb Corporation, the disruption of ongoing businesses or inconsistencies in standards, controls, procedures and policies. There could be potential unknown liabilities and unforeseen expenses associated with the Chubb acquisition that were not discovered in the course of performing due diligence.

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Chubb’s results will suffer if it does not effectively manage its expanded operations following the Chubb Acquisition.

Our success will depend, in part, on our ability to manage the expanded business following the merger, which poses numerous risks and uncertainties, including the need to integrate the operations and business of Chubb Corporation into our existing business in an efficient and timely manner, to combine systems and management controls, and to integrate relationships with customers, vendors, and business partners.

The effective tax rate that will apply to Chubb is uncertain and may vary from expectations.

There can be no assurance that the Chubb acquisition will allow us to maintain any particular worldwide effective corporate tax rate. No assurances can be given as to what our company's effective tax rate will be because of, among other things, uncertainty regarding the tax policies of the jurisdictions where it operates. Our company’s actual effective tax rate may vary from its expectations and that variance may be material.

If Section 7874 of the Internal Revenue Code were to apply as a result of the Chubb Acquisition, then we may be required to pay substantial additional U.S. federal income taxes going forward.

Section 7874 of the Internal Revenue Code of 1986, as amended (the Code) would apply if, (i) the percentage (by vote and value) of Chubb common shares considered to be held by former Chubb Corporation shareholders immediately after the Chubb acquisition by reason of holding Chubb Corporation common stock as calculated for Section 7874 purposes (the Section 7874 Percentage) is at least 60 percent, and (ii) the expanded affiliated group that includes Chubb does not have substantial business activities in Switzerland. Determining the Section 7874 Percentage is complex and, with respect to the Chubb acquisition, subject to factual and legal uncertainties, including the uncertain scope and application of possible regulatory action under Section 7874 announced by the IRS and the U.S. Treasury Department in Notices 2014-52 and 2015-79.

If the Section 7874 Percentage were determined to be at least 60 percent, several limitations could apply to us. For example, we would be prohibited from using certain net operating losses, foreign tax credits or other tax attributes, if any, to offset the income or gain recognized by reason of the transfer of property to a foreign related person during the 10-year period following the Chubb acquisition or any income received or accrued during such period by reason of a license of any property by the U.S. corporation to a foreign related person. In addition, the IRS has announced that it intends to promulgate new rules, which may limit the ability to engage in certain restructuring transactions relating to the non-U.S. members of the Chubb Group after the Chubb acquisition. Additionally, recent legislative, regulatory and treaty proposals in the United States would impose certain earnings stripping limitations and reduce potential tax treaty benefits with respect to Chubb and its affiliates if the Section 7874 Percentage is calculated to be at least 60 percent.

Section 7874 is not expected to apply as a result of the Chubb acquisition because the former Chubb Corporation shareholders received less than 60 percent of the legacy ACE common shares (by vote or value) by reason of holding Chubb Corporation common stock. However, it is possible that there could be a change in law under Section 7874 or otherwise (including the promulgation of regulations announced by the IRS and the U.S. Treasury Department in Notices 2014-52 and 2015-79) that could, prospectively or retroactively, adversely affect Chubb and its affiliates.

ITEM 1B. Unresolved Staff Comments

There are currently no unresolved SEC staff comments regarding our periodic or current reports.

ITEM 2. Properties

We maintain office facilities around the world including in North America, Europe (including our principal executive offices in Switzerland), Bermuda, Latin America, Asia Pacific, and the Far East. Most of our office facilities are leased, although we own major facilities in Hamilton, Bermuda, and in the U.S., including in Philadelphia, Pennsylvania and Wilmington, Delaware. Management considers its office facilities suitable and adequate for the current level of operations.

ITEM 3. Legal Proceedings

The information required with respect to Item 3 is included in Note 10 h) to the Consolidated Financial Statements, which is hereby incorporated herein by reference.

ITEM 4. Mine SafetyDisclosures

Item not applicable.

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PART II

ITEM 5. Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Repurchases of Equity Securities

Our Common Shares have been listed on the New York Stock Exchange since March 25, 1993, with a current par value of CHF 24.15 per share. The trading symbol for our Common Shares is "CB."

Quarterly Stock Information

The following table sets forth the high and low closing sales prices of our Common Shares per fiscal quarter, as reported on the New York Stock Exchange Composite Tape, and cash dividends on Common Shares:

	2015							2014
					Dividends							Dividends
Quarter Ending	High		Low		USD		CHF	High		Low		USD			CHF
March 31	$	115.00	$	107.96	$	0.65	0.62	$	101.70	$	92.19	$	0.75	(1)	0.65
June 30	$	112.37	$	101.60	$	0.67	0.62	$	105.32	$	97.61	$	0.65		0.58
September 30	$	111.13	$	99.72	$	0.67	0.65	$	107.39	$	99.95	$	0.65		0.61
December 31	$	119.47	$	102.29	$	0.67	0.67	$	117.58	$	102.92	$	0.65		0.63

⁽¹⁾  On January 10, 2014, our shareholders approved an increase to our dividend from $0.51 per share to $0.63 per share for the final two quarterly installments that had been earlier approved at our 2013 annual general meeting. Due to the timing of the approval, the $0.12 per share increase related to the quarter ended December 31, 2013 installment is included in the quarter ended March 31, 2014 dividend amount. Refer to Note 11 to the Consolidated Financial Statements for additional information.

We have paid dividends each quarter since we became a public company in 1993. Following Chubb's redomestication to Switzerland, our dividends have been distributed primarily by way of a par value reduction. However, at our May 2015 annual general meeting, our shareholders approved an annual dividend to be paid by way of a distribution from capital contribution reserves (Additional paid-in capital) through the transfer of dividends from Additional paid-in capital to Retained earnings (free reserves). This methodology was also used for the dividend increase approved by our shareholders on January 10, 2014.

Chubb Limited is a holding company whose principal sources of income are investment income and dividends from its operating subsidiaries. The ability of the operating subsidiaries to pay dividends to us and our ability to pay dividends to our shareholders are each subject to legal and regulatory restrictions. The recommendation and payment of future dividends will be based on the determination of the Board of Directors (Board) and will be dependent upon shareholder approval, profits and financial requirements of Chubb and other factors, including legal restrictions on the payment of dividends and such other factors as the Board deems relevant. Refer to Part I, Item 1A and Part II, Item 7 for additional information.

The last reported sale price of the Common Shares on the New York Stock Exchange Composite Tape on February 12, 2016 was $114.31.

The number of record holders of Common Shares as of February 12, 2016 was 7,893. This is not the actual number of beneficial owners of Chubb's Common Shares since most of our shareholders hold their shares through a stockbroker, bank or other nominee rather than directly in their own name. This number of record holders includes the beneficial owners of the shares issued in connection with The Chubb Corporation acquisition.

Refer to Part III, Item 12 for information relating to compensation plans under which equity securities are authorized for issuance.

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Issuer's Repurchases of Equity Securities

Period	Total Number of Shares Purchased(1)	Average Price Paid per Share		Approximate Dollar Value of Shares that May Yet be Purchased Under Publicly Announced Plan(2)
October 1 through October 31	1,923	$	106.07	$	766	million
November 1 through November 30	782	$	113.63	$	766	million
December 1 through December 31	2,225	$	116.27	—			(2)
Total	4,930

⁽¹⁾  This column includes activity related to the surrender to Chubb of common shares to satisfy tax withholding obligations in connection with the vesting of restricted stock issued to employees and the exercising of options by employees.

⁽²⁾  There are no outstanding share repurchase authorizations at December 31, 2015.

Performance Graph

Set forth below is a line graph comparing the dollar change in the cumulative total shareholder return on Chubb's Common Shares from December 31, 2010, through December 31, 2015, as compared to the cumulative total return of the Standard & Poor's 500 Stock Index and the cumulative total return of the Standard & Poor's Property-Casualty Insurance Index. The cumulative total shareholder return is a concept used to compare the performance of a company's stock over time and is the ratio of the stock price change plus the cumulative amount of dividends over the specified time period (assuming dividend reinvestment), to the stock price at the beginning of the time period. The chart depicts the value on December 31, 2011, 2012, 2013, 2014, and 2015, of a $100 investment made on December 31, 2010, with all dividends reinvested.

	12/31/2010	12/31/2011	12/31/2012	12/31/2013	12/31/2014	12/31/2015
Chubb Limited	$100	$114	$134	$177	$203	$212
S&P 500 Index	$100	$102	$118	$157	$178	$181
S&P 500 P&C Index	$100	$100	$120	$166	$192	$210

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ITEM 6. Selected Financial Data

(in millions, except per share data and percentages)	2015			2014			2013			2012			2011
Operations data:
Net premiums earned – excluding Life segment	$	15,266		$	15,464		$	14,708		$	13,761		$	13,528
Net premiums earned – Life segment	1,947			1,962			1,905			1,916			1,859
Total net premiums earned	17,213			17,426			16,613			15,677			15,387
Net investment income	2,194			2,252			2,144			2,181			2,242
Losses and loss expenses	9,484			9,649			9,348			9,653			9,520
Policy benefits	543			517			515			521			401
Policy acquisition costs and administrative expenses	5,211			5,320			4,870			4,542			4,540
Net income	2,834			2,853			3,758			2,706			1,540
Weighted-average shares outstanding – diluted	329			339			344			343			341
Diluted earnings per share	$	8.62		$	8.42		$	10.92		$	7.89		$	4.52
Balance sheet data (at end of period):
Total investments	$	66,251		$	62,904		$	60,928		$	60,264		$	55,676
Total assets	102,366			98,248			94,510			92,545			87,321
Net unpaid losses and loss expenses	26,562			27,008			26,831			26,547			25,875
Net future policy benefits	4,620			4,537			4,397			4,229			4,025
Long-term debt	9,447			3,357			3,807			3,360			3,360
Trust preferred securities	309			309			309			309			309
Total liabilities	73,231			68,661			65,685			65,014			62,989
Shareholders' equity	29,135			29,587			28,825			27,531			24,332
Book value per share	$	89.77		$	90.02		$	84.83		$	80.90		$	72.22
Selected data:
Loss and loss expense ratio (1)	58.1		%	58.7		%	59.6		%	65.7		%	66.0		%
Underwriting and administrative expense ratio (2)	29.2		%	29.4		%	28.4		%	28.2		%	28.7		%
Combined ratio (3)	87.3		%	88.1		%	88.0		%	93.9		%	94.7		%
Net loss reserves to capital and surplus ratio (4)	107.0		%	106.6		%	108.3		%	111.8		%	122.9		%
Cash dividends per share (5)	$	2.66		$	2.70		$	2.02		$	2.06		$	1.38

⁽¹⁾  The loss and loss expense ratio is calculated by dividing Losses and loss expenses, excluding the Life segment, by Net premiums earned – excluding Life segment. Losses and loss expenses for the Life segment were $601 million, $589 million, $582 million, $611 million, and $593 million for the years ended December 31, 2015, 2014, 2013, 2012, and 2011, respectively.

⁽²⁾  The underwriting and administrative expense ratio is calculated by dividing the Policy acquisition costs and administrative expenses, excluding the Life segment, by Net premiums earned – excluding Life segment. Policy acquisition costs and administrative expenses for the Life segment were $767 million, $763 million, $701 million, $662 million, and $656 million for the years ended December 31, 2015, 2014, 2013, 2012, and 2011, respectively.

⁽³⁾  The combined ratio is the sum of loss and loss expense ratio and the underwriting and administrative expense ratio.

⁽⁴⁾  The net loss reserves to capital and surplus ratio is calculated by dividing the sum of the Net unpaid losses and loss expenses and Net future policy benefits by Shareholders' equity.

⁽⁵⁾  Cash dividends per share in 2014 and 2012 include a $0.12 per share increase related to the fourth quarter 2013 and 2011 dividend installments, approved by our shareholders on January 10, 2014 and January 9, 2012, respectively.

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ITEM 7. Management's Discussion and Analysis of Financial Condition and Results of Operations

The following is a discussion of our results of operations, financial condition, and liquidity and capital resources as of and for the year ended December 31, 2015. This discussion should be read in conjunction with the consolidated financial statements and related Notes, under Item 8 of this Form 10-K.

All comparisons in this discussion are to the corresponding prior year unless otherwise indicated.

MD&A Index	Page
Forward-Looking Statements	36
Overview	38
Financial Highlights	39
Critical Accounting Estimates	40
Consolidated Operating Results	56
Prior Period Development	60
Segment Operating Results	61
Net Investment Income	71
Net Realized and Unrealized Gains (Losses)	72
Other Income and Expense Items	72
Amortization of Intangible Assets	73
Investments	73
Reinsurance Recoverable on Ceded Reinsurance	77
Asbestos and Environmental (A&E)	77
Catastrophe Management	78
Natural Catastrophe Property Reinsurance Program	78
Political Risk, Trade Credit, and Structured Trade Credit	79
Crop Insurance	80
Liquidity	81
Capital Resources	83
Contractual Obligations and Commitments	85
Credit Facilities	86
Ratings	87

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Forward-Looking Statements

The Private Securities Litigation Reform Act of 1995 provides a “safe harbor” for forward-looking statements. Any written or oral statements made by us or on our behalf may include forward-looking statements that reflect our current views with respect to future events and financial performance. These forward-looking statements are subject to certain risks, uncertainties, and other factors that could, should potential events occur, cause actual results to differ materially from such statements. These risks, uncertainties, and other factors, which are described in more detail under Part I, Item 1A, under Risk Factors, starting on page 19 and elsewhere herein and in other documents we file with the U.S. Securities and Exchange Commission (SEC), include but are not limited to:

• losses arising out of natural or man-made catastrophes such as hurricanes, typhoons, earthquakes, floods, climate change (including effects on weather patterns; greenhouse gases; sea; land and air temperatures; sea levels; and rain and snow), nuclear accidents, or terrorism which could be affected by:

• the number of insureds and ceding companies affected;

• the amount and timing of losses actually incurred and reported by insureds;

• the impact of these losses on our reinsurers and the amount and timing of reinsurance recoverable actually received;

• the cost of building materials and labor to reconstruct properties or to perform environmental remediation following a catastrophic event; and

• complex coverage and regulatory issues such as whether losses occurred from storm surge or flooding and related lawsuits;

• actions that rating agencies may take from time to time, such as financial strength or credit ratings downgrades or placing these ratings on credit watch negative or the equivalent;

• the ability to collect reinsurance recoverable, credit developments of reinsurers, and any delays with respect thereto and changes in the cost, quality, or availability of reinsurance;

• actual loss experience from insured or reinsured events and the timing of claim payments;

• the uncertainties of the loss-reserving and claims-settlement processes, including the difficulties associated with assessing environmental damage and asbestos-related latent injuries, the impact of aggregate-policy-coverage limits, the impact of bankruptcy protection sought by various asbestos producers and other related businesses, and the timing of loss payments;

• changes to our assessment as to whether it is more likely than not that we will be required to sell, or have the intent to sell, available for sale fixed maturity investments before their anticipated recovery;

• infection rates and severity of pandemics and their effects on our business operations and claims activity;

• developments in global financial markets, including changes in interest rates, stock markets, and other financial markets, increased government involvement or intervention in the financial services industry, the cost and availability of financing, and foreign currency exchange rate fluctuations (which we refer to in this report as foreign exchange and foreign currency exchange), which could affect our statement of operations, investment portfolio, financial condition, and financing plans;

• general economic and business conditions resulting from volatility in the stock and credit markets and the depth and duration of potential recession;

• global political conditions, the occurrence of any terrorist attacks, including any nuclear, radiological, biological, or chemical events, or the outbreak and effects of war, and possible business disruption or economic contraction that may result from such events;

• judicial decisions and rulings, new theories of liability, legal tactics, and settlement terms;

• the effects of public company bankruptcies and/or accounting restatements, as well as disclosures by and investigations of public companies relating to possible accounting irregularities, and other corporate governance issues, including the effects of such events on:

• the capital markets;

• the markets for directors and officers (D&O) and errors and omissions (E&O) insurance; and

• claims and litigation arising out of such disclosures or practices by other companies;

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• uncertainties relating to governmental, legislative and regulatory policies, developments, actions, investigations, and treaties, which, among other things, could subject us to insurance regulation or taxation in additional jurisdictions or affect our current operations;

• the actual amount of new and renewal business, market acceptance of our products, and risks associated with the introduction of new products and services and entering new markets, including regulatory constraints on exit strategies;

• the competitive environment in which we operate, including trends in pricing or in policy terms and conditions, which may differ from our projections and changes in market conditions that could render our business strategies ineffective or obsolete;

• acquisitions made by us performing differently than expected, our failure to realize anticipated expense-related efficiencies or growth from acquisitions, the impact of acquisitions on our pre-existing organization, or announced acquisitions not closing;

• risks and uncertainties relating to our the acquisition of The Chubb Corporation including our ability to successfully integrate the acquired company;

• risks associated with being a Swiss corporation, including reduced flexibility with respect to certain aspects of capital management and the potential for additional regulatory burdens;

• the potential impact from government-mandated insurance coverage for acts of terrorism;

• the availability of borrowings and letters of credit under our credit facilities;

• the adequacy of collateral supporting funded high deductible programs;

• changes in the distribution or placement of risks due to increased consolidation of insurance and reinsurance brokers;

• material differences between actual and expected assessments for guaranty funds and mandatory pooling arrangements;

• the effects of investigations into market practices in the property and casualty (P&C) industry;

• changing rates of inflation and other economic conditions, for example, recession;

• the amount of dividends received from subsidiaries;

• loss of the services of any of our executive officers without suitable replacements being recruited in a reasonable time frame;

• the ability of our technology resources, including information systems and security, to perform as anticipated such as with respect to preventing material information technology failures or third-party infiltrations or hacking resulting in consequences adverse to Chubb or its customers or partners; and

• management’s response to these factors and actual events (including, but not limited to, those described above).

The words “believe,” “anticipate,” “estimate,” “project,” “should,” “plan,” “expect,” “intend,” “hope,” “feel,” “foresee,” “will likely result,” or “will continue,” and variations thereof and similar expressions, identify forward-looking statements. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of their dates. We undertake no obligation to publicly update or review any forward-looking statements, whether as a result of new information, future events or otherwise.

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Overview

Through December 31, 2015, we operated through five business segments: Insurance – North American P&C, Insurance – North American Agriculture, Insurance – Overseas General, Global Reinsurance, and Life. For more information on our segments refer to “Segment Information” under Item 1.

We have grown our business through increased premium volume, expansion of product offerings and geographic reach, and acquisitions of other companies. Acquisitions in 2015, 2014, and 2013 are as follows:

• Insurance – North American P&C: the Fireman's Fund Insurance Company high net worth personal lines insurance business in the U.S. (April 1, 2015).

• Insurance – Overseas General:

• The large corporate account property and casualty (P&C) insurance business of Itaú Seguros (Itaú Seguros) (October 31, 2014);

• The Siam Commercial Samaggi Insurance PCL (Samaggi) (we and our local partner acquired 60.86 percent ownership on April 28, 2014, and subsequently acquired an additional 32.17 percent ownership through a mandatory tender offer, which expired on June 17, 2014);

• ABA Seguros (May 2, 2013);

• Fianzas Monterrey (April 1, 2013); and

• PT Asuransi Jaya Proteksi (JaPro) (we acquired 80 percent on September 18, 2012, and our local partner acquired the remaining 20 percent on January 3, 2013).

The consolidated financial statements include results of acquired businesses from the acquisition dates.

On January 14, 2016, we completed the acquisition of The Chubb Corporation (Chubb acquisition), a leading provider of middle-market commercial, specialty, surety, and personal insurance. Together, we expect the combined company, which operates under the Chubb brand, to be a global leader in commercial, specialty, and personal P&C insurance. The financial condition of the combined company, results of operations, liquidity, and capital resources are expected to materially change in 2016 and subsequent years.

Refer to Note 2 to the Consolidated Financial Statements for additional information on our acquisitions.

Our product and geographic diversification differentiates us from the vast majority of our competitors and has been a source of stability during periods of industry volatility. Our long-term business strategy focuses on sustained growth in book value achieved through a combination of underwriting and investment income. By doing so, we provide value to our clients and shareholders through use of our substantial capital base in the insurance and reinsurance markets.

We are organized along a profit center structure by line of business and territory that does not necessarily correspond to corporate legal entities. Profit centers can access various legal entities, subject to licensing and other regulatory rules. Profit centers are expected to generate underwriting income and appropriate risk-adjusted returns. Our corporate structure has facilitated the development of management talent by giving each profit center's senior management team the necessary autonomy within underwriting authorities to make operating decisions and create products and coverages needed by its target customer base. We are focused on delivering underwriting profit by only writing policies which we believe adequately compensate us for the risk we accept.

Our insurance and reinsurance operations generate gross revenues from two principal sources: premiums and investment income. Cash flow is generated from premiums collected and investment income received less paid losses and loss expenses, policy acquisition costs, and administrative expenses. Invested assets are substantially held in liquid, investment grade fixed income securities of relatively short duration. Claims payments in any short-term period are highly unpredictable due to the random nature of loss events and the timing of claims awards or settlements. The value of investments held to pay future claims is subject to market forces such as the level of interest rates, stock market volatility, and credit events such as corporate defaults. The actual cost of claims is also volatile based on loss trends, inflation rates, court awards, and catastrophes. We believe that our cash balance, our highly liquid investments, credit facilities, and reinsurance protection provide sufficient liquidity to meet unforeseen claim demands that might occur in the year ahead. Refer to “Liquidity” and “Capital Resources” for additional information.

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Financial Highlights for the Year Ended December 31, 2015

• Net income was $2,834 million compared with $2,853 million last year.

• Total company net premiums written decreased 0.5 percent (increased 5.1 percent in constant dollars). Net premiums written included $252 million from the transfer of the Fireman's Fund in-force business at the time of the transaction and will be non-recurring in 2016.

• P&C combined ratio was 87.4 percent compared with 87.7 percent in 2014. The GAAP combined ratio was 87.3 percent compared with 88.1 percent in 2014.

• The current accident year P&C combined ratio excluding catastrophe losses was 88.8 percent compared with 89.3 percent in 2014.

• The P&C expense ratio was 29.2 percent compared with 29.4 percent in 2014.

• Total pre-tax and after-tax catastrophe losses including reinstatement premiums were $322 million (2.1 percentage points of the combined ratio) and $272 million, respectively, compared with $288 million (1.8 percentage points of the combined ratio) and $249 million, respectively, in 2014.

• Favorable prior period development pre-tax and after-tax were $546 million (3.5 percentage points of the combined ratio) and $474 million, respectively, compared with $527 million (3.4 percentage points of the combined ratio) and $459 million, respectively, in 2014.

• Operating cash flow was $3.9 billion compared with $4.5 billion in 2014. Refer to “Liquidity” for additional information on our cash flows.

• Net investment income was $2.2 billion compared with $2.3 billion in 2014, down 2.6 percent, primarily reflecting the negative impact of foreign exchange of $49 million.

• Shareholders' equity declined during the year, as net income was more than offset by the negative impact of unrealized losses in our investment portfolio and unfavorable foreign currency movement, together totaling $2 billion, after-tax, dividends on common shares, and share repurchases during the year.

• The acquisition of The Chubb Corporation (Chubb acquisition) for $29.5 billion was completed on January 14, 2016, and included $14.3 billion in cash (including proceeds from the issuance of $5.3 billion of senior notes in November 2015) and $15.2 billion in newly issued stock. In addition, we assumed outstanding equity awards to employees and directors with an attributed value of approximately $340 million.

• Integration expenses related to the Chubb acquisition were $33 million, pre-tax, or $23 million, after-tax, in 2015 and include legal and professional fees and all costs directly related to the integration activities of the Chubb acquisition.

All divisions contributed positively to net income in 2015, driven by excellent underwriting results resulting in a record low combined ratio and strong investment income, despite the adverse impact of foreign exchange. On a constant-dollar basis, net premiums written grew over 5 percent, primarily in North America, Latin America, and Asia, and Net investment income declined less than one percent, despite historic low interest rates.

We completed the acquisition of the Fireman’s Fund high net worth personal lines business in the U.S. and launched ABR Reinsurance Ltd. (ABR Re), an independent reinsurance company. We own approximately 11.3 percent of the common equity of ABR Re's holding company. Through long-term arrangements, Chubb will be the sole source of reinsurance risks ceded to ABR Re. We also closed on our acquisition of The Chubb Corporation in January 2016 creating what we expect to be a global leader, operating under the Chubb brand, in commercial P&C for customers of many sizes, a premier provider of personal lines to high net worth individuals and families in the U.S., and a global leader in professional lines, commercial, specialty, and A&H. Our growth plans include new product capabilities into the middle market and agency channels. With respect to 2016 earnings of the combined entities, we estimate an investment income run rate for a full quarter of approximately $810 million to $825 million. We are now executing a detailed integration road map globally with integration plans on track including expense and growth-related initiatives. Our expected expense synergy target at this time for the Chubb acquisition is a $650 million annual run rate by the end of 2018. Our current estimate of integration costs is $535

39

million with an additional $100 million in branding-related expenses. We plan to update these estimates at the end of the first quarter of 2016.

Critical Accounting Estimates

Our consolidated financial statements include amounts that, either by their nature or due to requirements of generally accepted accounting principles in the U.S. (GAAP), are determined using best estimates and assumptions. While we believe that the amounts included in our consolidated financial statements reflect our best judgment, actual amounts could ultimately materially differ from those currently presented. We believe the items that require the most subjective and complex estimates are:

• unpaid loss and loss expense reserves, including long-tail asbestos and environmental (A&E) reserves;

• future policy benefits reserves;

• the valuation of value of business acquired (VOBA) and amortization of deferred policy acquisition costs and VOBA;

• the assessment of risk transfer for certain structured insurance and reinsurance contracts;

• reinsurance recoverable, including a provision for uncollectible reinsurance;

• the valuation of our investment portfolio and assessment of other-than-temporary impairments (OTTI);

• the valuation of deferred tax assets;

• the valuation of derivative instruments related to guaranteed living benefits (GLB); and

• the assessment of goodwill for impairment.

We believe our accounting policies for these items are of critical importance to our consolidated financial statements. The following discussion provides more information regarding the estimates and assumptions required to arrive at these amounts and should be read in conjunction with the sections entitled: Prior Period Development, Asbestos and Environmental (A&E), Reinsurance Recoverable on Ceded Reinsurance, Investments, Net Realized and Unrealized Gains (Losses), and Other Income and Expense Items.

Unpaid losses and loss expenses

As an insurance and reinsurance company, we are required by applicable laws and regulations and GAAP to establish loss and loss expense reserves for the estimated unpaid portion of the ultimate liability for losses and loss expenses under the terms of our policies and agreements with our insured and reinsured customers. At December 31, 2015, our gross unpaid loss and loss expense reserves were $37.3 billion and our net unpaid loss and loss expense reserves were $26.6 billion. With the exception of certain structured settlements, for which the timing and amount of future claim payments are reliably determinable, and certain reserves for unsettled claims that are discounted in statutory filings, our loss reserves are not discounted for the time value of money. In connection with such structured settlements and certain reserves for unsettled claims, we carried net discounted reserves of $92 million and $111 million at December 31, 2015 and 2014, respectively.

The following table presents a roll-forward of our unpaid losses and loss expenses:

	December 31, 2015									December 31, 2014
(in millions of U.S. dollars)	Gross Losses			Reinsurance Recoverable(1)			Net Losses			Gross Losses			Reinsurance Recoverable(1)			Net Losses
Balance, beginning of year	$	38,315		$	11,307		$	27,008		$	37,443		$	10,612		$	26,831
Losses and loss expenses incurred	12,541			3,057			9,484			12,748			3,099			9,649
Losses and loss expenses paid	(12,914		)	(3,249		)	(9,665		)	(12,409		)	(3,174		)	(9,235		)
Other (including foreign exchange translation)	(1,056		)	(374		)	(682		)	(835		)	(278		)	(557		)
Losses and loss expenses acquired	417			—			417			1,368			1,048			320
Balance, end of year	$	37,303		$	10,741		$	26,562		$	38,315		$	11,307		$	27,008

⁽¹⁾  Net of provision for uncollectible reinsurance.

The estimate of the liabilities includes provisions for claims that have been reported but are unpaid at the balance sheet date (case reserves) and for obligations on claims that have been incurred but not reported (IBNR) at the balance sheet date. IBNR

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may also include provisions to account for the possibility that reported claims may settle for amounts that differ from the established case reserves. Loss reserves also include an estimate of expenses associated with processing and settling unpaid claims (loss expenses). Our loss reserves comprise approximately 85 percent casualty-related business, which typically encompasses long-tail risks and other risks where a high degree of judgment is required (see discussion below on reserving for long-tail business).

The following table segregates loss reserves by three broad line of business groupings: property and all other, casualty, and A&H (or personal accident). In the table, loss expenses are defined to include unallocated and allocated loss adjustment expenses.

		December 31, 2015						December 31, 2014
(in millions of U.S. dollars)		Gross		Ceded		Net		Gross		Ceded		Net
Property and all other
	Case reserves	$	3,354	$	1,707	$	1,647	$	4,110	$	1,959	$	2,151
	Loss expenses	269		66		203		216		58		158
	IBNR reserves	2,367		858		1,509		2,095		792		1,303
	Subtotal	5,990		2,631		3,359		6,421		2,809		3,612
Casualty
	Case reserves	8,845		2,240		6,605		9,071		2,210		6,861
	Loss expenses	3,790		1,230		2,560		3,881		1,348		2,533
	IBNR reserves	17,762		4,470		13,292		17,914		4,672		13,242
	Subtotal	30,397		7,940		22,457		30,866		8,230		22,636
A&H
	Case reserves	361		42		319		417		85		332
	Loss expenses	28		6		22		28		7		21
	IBNR reserves	527		122		405		583		176		407
	Subtotal	916		170		746		1,028		268		760
Total
	Case reserves	12,560		3,989		8,571		13,598		4,254		9,344
	Loss expenses	4,087		1,302		2,785		4,125		1,413		2,712
	IBNR reserves	20,656		5,450		15,206		20,592		5,640		14,952
	Total	$	37,303	$	10,741	$	26,562	$	38,315	$	11,307	$	27,008

The process of establishing loss reserves for property and casualty claims can be complex and is subject to considerable uncertainty as it requires the use of informed estimates and judgments based on circumstances underlying the insured loss known at the date of accrual. For example, the reserves established for high excess casualty claims, asbestos and environmental claims, claims from major catastrophic events or for our various product lines each require different assumptions and judgments to be made. Necessary judgments are based on numerous factors and may be revised as additional experience and other data become available and are reviewed, as new or improved methods are developed, or as laws change. Hence, ultimate loss payments may differ from the estimate of the ultimate liabilities made at the balance sheet date. Changes to our previous estimates of prior period loss reserves impact the reported calendar year underwriting results, adversely if our estimates increase and favorably if our estimates decrease. The potential for variation in loss reserve estimates is impacted by numerous factors, which we discuss below (see also the section on reserving for long-tail business). Reserve estimates for casualty lines are particularly uncertain given the lengthy reporting patterns and corresponding need for IBNR.

Case reserves for those claims reported by insureds or ceding companies to us prior to the balance sheet date, and where we have sufficient information, are determined by our claims personnel as appropriate based on the circumstances of the claim(s), standard claim handling practices, and professional judgment. Furthermore, for our Brandywine run-off operations and our

assumed reinsurance operation, Global Reinsurance, we may adjust the case reserves as notified by the ceding company via use of an additional case reserve if the judgment of our respective claims department differs from that of the cedant (see also the Assumed reinsurance section below).

With respect to IBNR reserves, and those claims that have been incurred but not reported prior to the balance sheet date, there is, by definition, limited actual information to form the case reserve estimate and reliance is placed upon historical loss

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experience and actuarial methods to estimate the ultimate loss obligations and the corresponding amount of IBNR. IBNR reserve estimates are generally calculated by first projecting the ultimate amount of losses for a product line and subtracting paid losses and case reserves for reported claims. The judgments involved in projecting the ultimate losses may pertain to the use and interpretation of various standard actuarial reserving methods that place reliance on the extrapolation of actual historical data, loss development patterns, industry data, and other benchmarks as appropriate. The estimate of the required IBNR reserve also requires judgment by actuaries and management to reflect the impact of more contemporary and subjective factors, both qualitative and quantitative. Among some of these factors that might be considered are changes in business mix or volume, changes in ceded reinsurance structures, changes in claims handling practices, reported and projected loss trends, inflation, the legal environment, and the terms and conditions of the contracts sold to our insured parties.

Determining management's best estimate

Our recorded reserves represent management's best estimate of the provision for unpaid claims as of the balance sheet date. Management's best estimate is developed after collaboration with actuarial, underwriting, claims, legal, and finance departments and culminates with the input of reserve committees. Each business unit reserve committee includes the participation of the relevant parties from actuarial, finance, claims, and unit senior management and has the responsibility for finalizing, recommending and approving the estimate to be used as management's best estimate. Reserves are further reviewed by Chubb's Chief Actuary and senior management. The objective of such a process is to determine a single estimate that we believe represents a better estimate than any other and which is viewed by management to be the best estimate of ultimate loss settlements.

This estimate is generally based on a combination of exposure and experience based actuarial methods (described below) and other considerations such as claims reviews, reinsurance recovery assumptions and/or input from other subject matter experts such as underwriting. Exposure-based methods are most commonly used on relatively immature origin years while experience-based methods provide a view based on the projection of loss experience that has emerged as of the valuation date. Greater reliance is placed upon experience-based methods as the pool of emerging loss experience grows and where it is deemed sufficiently credible and reliable as the basis for the estimate. In comparing the held reserve for any given origin year to the actuarial projections, judgment is required as to the credibility, uncertainty and inherent limitations of applying actuarial techniques to historical data to project future loss experience. Examples of factors that impact such judgments include, but are not limited to, the following:

• nature and complexity of underlying coverage provided and net limits of exposure provided;

• segmentation of data to provide sufficient homogeneity and credibility for loss projection methods;

• extent of credible internal historical loss data and reliance upon industry information as required;

• historical variability of actual loss emergence compared with expected loss emergence;

• extent of emerged loss experience relative to the remaining expected period of loss emergence;

• rate monitor information for new and renewal business;

• facts and circumstances of large claims;

• impact of applicable reinsurance recoveries; and

• nature and extent of underlying assumptions.

Management does not build in any specific provision for uncertainty.

We do not calculate ranges of loss reserve estimates for our individual loss reserve studies, given the lack of robust statistical approaches and the limited usefulness for such information in decision making. Determining such ranges is a complex and uncertain process, and such ranges generally do not capture the potential changes in external and internal circumstances between the balance sheet date and the final settlement date that may impact the ultimate value of loss. While we believe that our recorded reserves are reasonable and represent management's best estimate for each product line as of the current valuation date, future changes to our view of the ultimate liabilities are possible. A five percent change in our net loss reserves equates to $1.3 billion and represents five percent of shareholders' equity at December 31, 2015. Historically our reserves, at times, have developed in excess of 10 percent of recorded amounts. Refer to “Analysis of Losses and Loss Expenses Development”, under Item 1, for a summary of historical volatility between estimated loss reserves and ultimate loss settlements.

We have actuarial staff within each of our business units who analyze loss reserves and regularly project estimates of ultimate losses and the corresponding indications of the required IBNR reserve. Note that losses include loss expenses for the purposes

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of this discussion. We perform an actuarial reserve review for each product line at least once a year. At the conclusion of each review, we establish an actuarial central estimate. The process to select the actuarial central estimate, when more than one estimate is available, may differ across product lines. For example, an actuary may base the central estimate on loss projections developed using an incurred loss development approach instead of a paid loss development approach when reported losses are viewed to be a more credible indication of the ultimate loss compared with paid losses. The availability of estimates for different projection techniques will depend upon the product line, the underwriting circumstances, and the maturity of the loss emergence. For a well-established product line with sufficient volume and history and low volatility, the actuarial central estimate may be drawn from a weighting of paid and reported loss development and/or Bornhuetter-Ferguson methods (described below). However, for a new long-tail product line for which we have limited data and experience, a rapidly growing line, or an established line with volatile experience, the emerging loss experience may not have sufficient credibility to allow selection of loss development or Bornhuetter-Ferguson methods and reliance may be placed upon the expected loss ratio method (described below) until the experience matures and becomes credible.

Typically, for each product line, one or more standard actuarial reserving methods may be used to estimate ultimate losses and loss expenses, and from these estimates, a single actuarial central estimate is selected. Exceptions to the use of standard actuarial projection methods occur for individual claims of significance that require complex legal, claims, and actuarial analysis and judgment (for example, A&E account projections or high excess casualty/professional lines accounts in litigation) or for product lines where the nature of the claims experience and/or availability of the data prevent application of such standard methods. In addition, claims arising from certain catastrophic events require evaluations that do not utilize standard actuarial loss projection methods but are based upon our exposure at the time of the event and the circumstances of the catastrophe and its post-event impact.

In addition to the annual loss reserve studies performed for each product line, we review the emergence of actual losses relative to expectations for most product lines each quarter. If warranted from findings in loss emergence tests, we may alter the timing of our product line reserve studies. Finally, loss reserve studies are performed annually by external third-parties and the findings are used to provide management an independent assessment of our internal findings.

Standard actuarial reserving methods

Standard actuarial reserving methods include, but are not limited to, expected loss ratio, paid and reported loss development, and Bornhuetter-Ferguson methods. A general description of these methods is provided below. In the subsequent discussion on short-tail and long-tail business, reference is also made, where appropriate, to how consideration in method selection impacted 2015 results. In addition to these standard methods, depending upon the product line characteristics and available data we may use other recognized actuarial methods and approaches. To ensure that the projections of future loss emergence based on historical loss development patterns are representative of the underlying business, historical loss and premium data is required to be of sufficient homogeneity and credibility. For example, to improve data homogeneity, we may subdivide product line data further by similar risk attribute (e.g., geography, coverage such as property versus liability exposure, or elements of program structure such as attachments or limits), project ultimate losses for these homogeneous groups and then combine the results to provide the overall product line estimate. The premium and loss data are aggregated by origin year (e.g., the year in which the losses were incurred - “accident year” or “report year”) and annual or quarterly development periods, and data at all valuations is converted at the same foreign exchange rates in order to avoid distortions from exchange rate movements over time. Implicit in the standard actuarial methods that we generally utilize is the need for two fundamental assumptions: first, the pattern by which losses are expected to emerge over time for each origin year, and second the expected loss ratio for each origin year.

The expected loss ratio for any particular origin year is selected after consideration of a number of factors, including historical loss ratios adjusted for rate changes, premium and loss trends, industry benchmarks, the results of policy level loss modeling at the time of underwriting, and/or other more subjective considerations for the product line (e.g., terms and conditions) and external environment as noted above. The expected loss ratio for a given origin year is initially established at the start of the origin year as part of the planning process. This analysis is performed in conjunction with underwriters and management. The expected loss ratio method arrives at an ultimate loss estimate by multiplying the expected ultimate loss ratio by the corresponding premium base. This method is most commonly used as the basis for the actuarial central estimate for immature origin periods on product lines where the actual paid or reported loss experience is not yet deemed sufficiently credible to serve as the principal basis for the selection of ultimate losses. The expected loss ratio for a given origin year may be modified over time if the underlying assumptions differ from the original assumptions (for example, the assessment of prior year loss ratios, loss trend, rate changes, actual claims, or other information).

Our selected paid and reported development patterns provide a benchmark against which the actual emerging loss experience can be monitored. Where possible, development patterns are selected based on historical loss emergence by origin year with

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appropriate allowance for changes in business mix, claims handling process, and/or ceded reinsurance that are likely to lead to a discernible difference between the rate of historical and future loss emergence. For product lines where the historical data is viewed to have low statistical credibility, the selected development patterns also reflect relevant industry benchmarks and/or experience from similar product lines written elsewhere within Chubb. This most commonly occurs for relatively new product lines that have limited historical data or for high severity/low frequency portfolios where our historical experience exhibits considerable volatility and/or lacks credibility. The paid and reported loss development methods convert the selected loss emergence pattern to a set of multiplicative factors which are then applied to actual paid or reported losses to arrive at an estimate of ultimate losses for each period. Due to their multiplicative nature, the paid and reported loss development methods will leverage differences between actual and expected loss emergence. These methods tend to be utilized for more mature origin periods and for those portfolios where the loss emergence has been relatively consistent over time.

The Bornhuetter-Ferguson method is essentially a combination of the expected loss ratio method and the loss development method, where the loss development method is given more weight as the origin year matures. This approach allows a logical transition between the expected loss ratio method which is generally utilized at earlier maturities and the loss development methods which are typically utilized at later maturities. We usually apply this method using reported loss data although paid data may also be used.

The applicability of actuarial methods will also be impacted by the attachment point of the policy or contract with the insured or ceding company. In the case of low attachment points typical of primary insurance or working layer reinsurance, the experience tends to be more frequency driven. For these product types, standard actuarial methods are generally applicable in determining loss reserve levels given sufficient history and credible loss experience (although still subject to the same limitations and uncertainties described elsewhere in this section, for example, changing inflationary or legal environments). In the case of high attachment points typical of excess insurance or excess of loss reinsurance, the experience tends to be severity driven, as only a loss of significant size will enter the layer. For these product lines, it typically takes longer for loss experience to gain credibility, which adds uncertainty to the estimates derived from standard actuarial methods. For products such as our assumed reinsurance business, we typically supplement the standard actuarial methods with an analysis of each contract's terms, original pricing information, subsequent internal and external analyses of the ongoing contracts, market exposures and history, and qualitative input from claims managers. This approach is also used for structured or unique contracts.

Short-tail and long-tail business

The time period between the date of loss occurrence and the final payment date of the ensuing claim(s) is referred to as the "claim-tail." The following is a discussion of specific reserving considerations for both short-tail and long-tail product lines. In this section, we reference the nature of recent prior period development to give a high-level understanding of how these considerations translate through the reserving process into financial decisions. Refer to Note 7 to the Consolidated Financial Statements for additional information on prior period development.

Short-tail business

Short-tail business generally describes product lines for which losses are typically known and paid shortly after the loss actually occurs. This would include, for example, most property, personal accident, aviation hull, and automobile physical damage policies that we write. There are some exceptions on certain product lines or events (e.g., major hurricanes or aviation crashes) where the event has occurred, but the final settlement amount is highly uncertain (e.g., coverage disputes or liability-related claims) and not known with certainty for a potentially lengthy period. Due to the short reporting and development pattern for these product lines, the uncertainty associated with our estimate of ultimate losses for any particular accident period diminishes relatively quickly as actual loss experience emerges. We typically assign credibility to methods that incorporate actual loss emergence, such as the paid and reported loss development and Bornhuetter-Ferguson methods, sooner than would be the case for long-tail lines at a similar stage of development for a given origin year. The reserving process for short-tail losses arising from catastrophic events typically involves an assessment by the claims department, in conjunction with underwriters and actuaries, of our exposure and estimated losses immediately following an event and then subsequent revisions of the estimated losses as our insureds provide updated actual loss information.

For origin year 2015, loss reserves for short-tail lines were typically established for the non-catastrophe exposures using a combination of the initial expected loss ratio method (see above) and loss development methods that incorporate actual loss emergence. As the year progressed, we also adjusted these reserves for non-catastrophe large loss activity that we considered to be greater or less than the assumptions used to establish the initial expected loss ratio. Catastrophe activity was relatively low in 2015 and accordingly the judgments and uncertainties used to establish reserves for incurred catastrophe events were correspondingly less complex. For our short-tail businesses taken as a whole, overall loss trend assumptions did not differ significantly relative to prior years.

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In terms of prior accident years, the bulk of the changes made in the 2015 calendar year arose from origin years 2010 through 2013. Specifically, the Insurance – North American P&C, Insurance – Overseas General, and Global Reinsurance segments experienced $70 million, $177 million, and $13 million of favorable prior period development, respectively, primarily due to lower than anticipated loss emergence rather than any significant changes to underlying actuarial assumptions such as loss development patterns. This favorable prior period development was primarily the result of changes to the ultimate loss estimates for origin years 2012 and 2013 for Insurance – North American P&C, origin years 2010 through 2013 for Insurance – Overseas General, and origin year 2001 for Global Reinsurance. Insurance – North American Agriculture experienced $45 million of favorable prior period development primarily due to better than expected claim development for the 2014 crop year in our Multiple Peril Crop Insurance business.

Long-tail business

Long-tail business describes lines of business for which specific losses may not be known/reported for some period and for which claims can take significant time to settle/close. This includes most casualty lines such as general liability, D&O, and workers' compensation. There are various factors contributing to the uncertainty and volatility of long-tail business. Among these are:

• The nature and complexity of underlying coverage provided and net limits of exposure provided;

• Our historical loss data and experience is sometimes too immature and lacking in credibility to rely upon for reserving purposes. Where this is the case, in our reserve analysis we may utilize industry loss ratios or industry benchmark development patterns that we believe reflect the nature and coverage of the underwritten business and its future development, where available. For such product lines, actual loss experience may differ from industry loss statistics as well as loss experience for previous underwriting years;

• The considerable inherent uncertainty around loss trends, claims inflation (e.g., medical and judicial) and underlying economic conditions;

• The inherent uncertainty of the estimated duration of the paid and reported loss development patterns beyond the historical record requires that professional judgment be used in the determination of the length of the patterns based on the historical data and other information;

• The inherent uncertainty of assuming that historical paid and reported loss development patterns for older origin years will be representative of subsequent loss emergence on recent origin years. For example, changes over time in the processes and procedures for establishing case reserves can distort reported loss development patterns or changes in ceded reinsurance structures by origin year can alter the development of paid and reported losses;

• Loss reserve analyses typically require loss or other data be grouped by common characteristics in some manner. If data from two combined lines of business exhibit different characteristics, such as loss payment patterns, the credibility of the reserve estimate could be affected. Additionally, since casualty lines of business can have significant intricacies in the terms and conditions afforded to the insured, there is an inherent risk as to the homogeneity of the underlying data used in performing reserve analyses; and

• The applicability of the price change data used to estimate ultimate loss ratios for most recent origin years.

As can be seen from the above, various factors are considered when determining appropriate data, assumptions, and methods used to establish the loss reserve estimates for long-tail product lines. These factors may also vary by origin year for given product lines. The derivation of loss development patterns from data and the selection of a tail factor to project ultimate losses from actual loss emergence require considerable judgment, particularly with respect to the extent to which historical loss experience is relied upon to support changes in key reserving assumptions. Examples of the relationship between changes in historical loss experience and key reserving assumptions are provided below.

For those long-tail product lines that are less claim frequency and more claim severity oriented, such as high excess professional and casualty lines, we placed more reliance upon expert legal and claims review of the specific circumstances underlying reported cases rather than loss development patterns. Where appropriate, we then supplemented this with loss development and Bornhuetter-Ferguson approaches to provide for claims that have been reported but are too immature to develop individual claims estimates and also to provide for claims that have occurred but have not been reported. The assumptions used for these lines of business are updated over time to reflect new claim and legal advice judged to be of significance.

Our assumptions on loss trend and development patterns reflect reliance on our historical loss data provided the length and volume of history and homogeneity afford credibility. For those lines where our internal historical experience lacks credibility, we may place reliance upon the latest benchmark patterns (where available) from external industry bodies such as Insurance

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Services Office (ISO) or the National Council on Compensation Insurance, Inc. (NCCI). In such cases, the assumptions used to project ultimate loss estimates will not fully reflect our own actual loss experience until our data is deemed sufficiently credible. We note that industry patterns are not always available to match the nature of the business being written; this issue is particularly problematic for non-U.S. exposed lines. Given the underlying volatility of the long-tail product lines and the lengthy period required for full paid and reported loss emergence, we typically assign little to no credibility to actual loss emergence that is lower than expected in the early development periods. Accordingly, we generally used the expected loss ratio method for the 2015 and immediately preceding origin years to establish reserves by product line. We monitor actual paid and reported loss emergence relative to expected loss emergence for most individual product lines.

As described earlier, the process to develop origin year 2015 reserves for our long-tail casualty business relies on estimates of ultimate and historical loss ratios for prior origin years adjusted to current levels through the use of key assumptions such as expected rate change and loss trend. When estimating the ultimate loss levels for these prior origin years for the major long-tail lines in Insurance – North American P&C, Insurance – Overseas General, and Global Reinsurance no changes of significance were made to the loss development patterns. While we generally use trends observed in internal and/or industry data to adjust prior year losses to current levels, we have made no material changes to the prospective loss trends used to develop ultimate loss ratios for origin year 2015.

For long-tail portfolios where actual loss emergence in calendar year 2015 was lower than expected for the more recent origin years, the deviation was not typically seen as sufficiently credible, particularly given the volatility and lengthy period for full loss emergence, to fully reflect in our booked ultimate loss selections or the actuarial assumptions underlying the reserve reviews. However, for certain product lines with early loss emergence on more recent origin years that was greater than expected, we did respond where we believed that such adverse emergence was generally significant relative to the loss emergence assumptions (e.g., origin years 2012 and 2014 for casualty and financial lines in Insurance – Overseas General). Such judgments were made with due consideration to the factors impacting reserve uncertainty as discussed above. The reserve actions that we took in 2015 are discussed further below and in Note 7 to the Consolidated Financial Statements.

For more mature origin years, typically 2011 and prior, we gave meaningful weight to indicated ultimates derived from methods that rely on the paid and reported loss development patterns based on our own historical experience where sufficient credibility was deemed to exist. As noted previously, this is consistent with our practice of allowing favorable loss emergence sufficient time to be reliably established before assigning partial or full credibility.

The prior period development in 2015 for long-tail lines of business comprised several main components. First, we experienced favorable prior period development on a number of product lines where actual loss emergence was lower than expected and/or increased weighting was given to experience-based methods as relevant origin years mature (typically 2011 and prior). In particular, this included management and professional liability portfolios, and auto liability excess and general liability portfolios, in Insurance – North American P&C ($166 million favorable) principally in origin years 2009 through 2011, casualty and financial lines in Insurance – Overseas General for origin years 2011 and prior ($175 million favorable), and origin years 2010 and prior for long-tail product lines in Global Reinsurance ($64 million favorable). Second, we recorded reserve actions in response to development on specific large claims. Third, we experienced adverse development from Insurance – North American P&C run-off operations including Westchester and Brandywine run-off operations ($200 million). The causes for the Westchester and Brandywine operations are described further below.

Sensitivity to underlying assumptions

While we believe that our reserve for unpaid losses and loss expenses at December 31, 2015, is adequate, new information or emerging trends that differ from our assumptions may lead to future development of losses and loss expenses that is significantly greater or less than the recorded reserve, which could have a material effect on future operating results. As noted previously, our best estimate of required loss reserves for most portfolios is judgmentally selected for each origin year after considering the results from a number of reserving methods and is not a purely mechanical process. Therefore, it is difficult to convey, in a simple and quantitative manner, the impact that a change to a single assumption will have on our best estimate. In the examples below, we attempt to give an indication of the potential impact by isolating a single change for a specific reserving method that would be pertinent in establishing the best estimate for the product line described. We consider each of the following sensitivity analyses to represent a reasonably likely deviation in the underlying assumption.

Insurance – North American P&C

Given the long reporting and paid development patterns for workers' compensation business, the development factors used to project actual current losses to ultimate losses for our current exposure requires considerable judgment that could be material to consolidated loss and loss expense reserves. Specifically, adjusting ground up ultimate losses by a one percent change in the

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tail factor (i.e., 1.04 changed to either 1.05 or 1.03) would cause a change of approximately $470 million, either positive or negative, for the projected net loss and loss expense reserves. This represents an impact of 10 percent relative to recorded net loss and loss expense reserves of approximately $4.6 billion.

The reserve portfolio for our ACE Bermuda operations contains exposure to predominantly high excess liability coverage on an occurrence-first-reported basis (typically with attachment points in excess of $325 million and gross limits of up to $150 million) and D&O and other professional liability coverage on a claims-made basis (typically with attachment points in excess of $125 million and gross limits of up to $75 million). Due to the layer of exposure covered, the expected frequency for this book is very low. As a result of the low frequency/high severity nature of the book, a small difference in the actual vs. expected claim frequency, either positive or negative, could result in a material change to the projected ultimate loss if such change in claim frequency was related to a policy where close to maximum limits were deployed.

Insurance – North American Agriculture

Approximately 69 percent of the reserves for this segment are from the crop related lines, which all have short payout patterns, with the majority of the liabilities expected to be resolved in the ensuing twelve months. Reserves for our Multiple Peril Crop Insurance (MPCI) product are set on a case-by-case basis and our aggregate exposure is subject to state level risk sharing formulae as well as third-party reinsurance. The majority of the development risk arises out of the accuracy of case reserve estimates. We do not view our Agriculture reserves as substantially influenced by the general assumptions and risks underlying more typical P&C reserve estimates.

Insurance – Overseas General

Certain long-tail lines, such as casualty and professional lines, are particularly susceptible to changes in loss trend and claim inflation.  Heightened perceptions of tort and settlement awards around the world are increasing the demand for these products as well as contributing to the uncertainty in the reserving estimates.  Our reserving methods rely on loss development patterns estimated from historical data and while we attempt to adjust such factors for known changes in the current tort environment, it is possible that such factors may not entirely reflect all recent trends in tort environments.  For example, when applying the reported loss development method, the lengthening of our selected loss development patterns by six months would increase reserve estimates on long-tail casualty and professional lines for accident years 2013 and prior by approximately $262 million. This represents an impact of 12.4 percent relative to recorded net loss and loss expense reserves of approximately $2.1 billion.

Global Reinsurance

Typically, there is inherent uncertainty around the length of paid and reported development patterns, especially for certain casualty lines such as excess workers' compensation or general liability, which may take up to 30 years to fully develop.  This uncertainty is accentuated by the need to supplement client development patterns with industry development patterns due to the sometimes low credibility of the data. The underlying source and selection of the final development patterns can thus have a significant impact on the selected ultimate net losses and loss expenses. For example, a 20 percent shortening or lengthening of the development patterns used for U.S. long-tail lines would cause the loss reserve estimate derived by the reported Bornhuetter-Ferguson method for these lines to change by approximately $446 million. This represents an impact of 45 percent relative to recorded net loss and loss expense reserves of approximately $1.0 billion.

Assumed reinsurance

At December 31, 2015, net unpaid losses and loss expenses for the Global Reinsurance segment aggregated to $1.7 billion, consisting of $740 million of case reserves and $975 million of IBNR. In comparison, at December 31, 2014, net unpaid losses and loss expenses for the Global Reinsurance segment aggregated to $2.0 billion, consisting of $872 million of case reserves and $1.1 billion of IBNR.

For catastrophe business, we principally estimate unpaid losses and loss expenses on an event basis by considering various sources of information, including specific loss estimates reported by our cedants, ceding company and overall industry loss estimates reported by our brokers, and our internal data regarding reinsured exposures related to the geographical location of the event. Our internal data analysis enables us to establish catastrophe reserves for known events with more certainty at an earlier date than would be the case if we solely relied on reports from third parties to determine carried reserves.

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For our casualty reinsurance business, we generally rely on ceding companies to report claims and then use that data as a key input to estimate unpaid losses and loss expenses. Due to the reliance on claims information reported by ceding companies, as well as other factors, the estimation of unpaid losses and loss expenses for assumed reinsurance includes certain risks and uncertainties that are unique relative to our direct insurance business. These include, but are not necessarily limited to, the following:

• The reported claims information could be inaccurate;

• Typically, a lag exists between the reporting of a loss event to a ceding company and its reporting to us as a reinsurance claim. The use of a broker to transmit financial information from a ceding company to us increases the reporting lag. Because most of our reinsurance business is produced by brokers, ceding companies generally first submit claim and other financial information to brokers, who then report the proportionate share of such information to each reinsurer of a particular treaty. The reporting lag generally results in a longer period of time between the date a claim is incurred and the date a claim is reported compared with direct insurance operations. Therefore, the risk of delayed recognition of loss reserve development is higher for assumed reinsurance than for direct insurance lines; and

• The historical claims data for a particular reinsurance contract can be limited relative to our insurance business in that there may be less historical information available. Further, for certain coverages or products, such as excess of loss contracts, there may be relatively few expected claims in a particular year so the actual number of claims may be susceptible to significant variability. In such cases, the actuary often relies on industry data from several recognized sources.

We mitigate the above risks in several ways. In addition to routine analytical reviews of ceding company reports to ensure reported claims information appears reasonable, we perform regular underwriting and claims audits of certain ceding companies to ensure reported claims information is accurate, complete, and timely. As appropriate, audit findings are used to adjust claims in the reserving process. We also use our knowledge of the historical development of losses from individual ceding companies to adjust the level of adequacy we believe exists in the reported ceded losses.

On occasion, there will be differences between our carried loss reserves and unearned premium reserves and the amount of loss reserves and unearned premium reserves reported by the ceding companies.  This is due to the fact that we receive consistent and timely information from ceding companies only with respect to case reserves.  For IBNR, we use historical experience and other statistical information, depending on the type of business, to estimate the ultimate loss.  We estimate our unearned premium reserve by applying estimated earning patterns to net premiums written for each treaty based upon that treaty's coverage basis (i.e., risks attaching or losses occurring).  At December 31, 2015, the case reserves reported to us by our ceding companies were $723 million, compared with the $740 million we recorded.  Our policy is to post additional case reserves in addition to the amounts reported by our cedants when our evaluation of the ultimate value of a reported claim is different than the evaluation of that claim by our cedant.

Within the Insurance – North American P&C segment, we also have exposure to certain liability reinsurance lines that have been in run-off since 1994. Unpaid losses and loss expenses relating to this run-off reinsurance business resides within the Brandywine Division of our Insurance – North American P&C segment. Most of the remaining unpaid loss and loss expense reserves for the run-off reinsurance business relate to A&E claims. Refer to the “Asbestos and Environmental (A&E)” section for additional information.

Asbestos and environmental reserves

Included in our liabilities for losses and loss expenses are amounts for A&E (A&E liabilities). The A&E liabilities principally relate to claims arising from bodily-injury claims related to asbestos products and remediation costs associated with hazardous waste sites. The estimation of our A&E liabilities is particularly sensitive to future changes in the legal, social, and economic environment. We have not assumed any such future changes in setting the value of our A&E liabilities, which include provisions for both reported and IBNR claims.

There are many complex variables that we consider when estimating the reserves for our inventory of asbestos accounts and these variables may directly impact the predicted outcome. We believe the most significant variables relating to our A&E liabilities include the current legal environment; specific settlements that may be used as precedents to settle future claims; assumptions regarding trends with respect to claim severity and the frequency of higher severity claims; assumptions regarding the ability to allocate liability among defendants (including bankruptcy trusts) and other insurers; the ability of a claimant to bring a claim in a state in which they have no residency or exposure; the ability of a policyholder to claim the right to unaggregated coverage; whether high-level excess policies have the potential to be accessed given the policyholder's claim trends and liability situation; payments to unimpaired claimants; and, the potential liability of peripheral defendants. Based on

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the policies, the facts, the law, and a careful analysis of the impact that these factors will likely have on any given account, we estimate the potential liability for indemnity, policyholder defense costs, and coverage litigation expense.

The results in asbestos cases announced by other carriers or defendants may well have little or no relevance to us because coverage exposures are highly dependent upon the specific facts of individual coverage and resolution status of disputes among carriers, policyholders, and claimants.

For additional information refer to the “Asbestos and Environmental (A&E)” section and to Note 7 to the Consolidated Financial Statements.

Future policy benefits reserves

We issue contracts in our Insurance – Overseas General and Life segments that are classified as long-duration.  These contracts generally include accident and supplemental health products, term and whole life products, endowment products, and annuities.  In accordance with GAAP, we establish reserves for contracts determined to be long-duration based on approved actuarial methods that include assumptions related to expenses, mortality, morbidity, persistency, and investment yields with a factor for adverse deviation.  These assumptions are “locked in” at the inception of the contract, meaning we use our original assumptions throughout the life of the policy and do not subsequently modify them unless we deem the reserves to be inadequate.  The future policy benefits reserves balance is regularly evaluated for a premium deficiency.  If experience is less favorable than assumptions, additional liabilities may be required, resulting in a charge to policyholder benefits and claims.

Valuation of value of business acquired (VOBA) and amortization of deferred policy acquisition costs and VOBA

As part of the acquisition of businesses that sell long-duration contracts, such as life products, we established an intangible asset related to VOBA, which represented the fair value of the future profits of the in-force contracts.  The valuation of VOBA at the time of acquisition is derived from similar assumptions to those used to establish the associated future policy benefits reserves.  The most significant input in this calculation is the discount rate used to arrive at the present value of the net cash flows.  We amortize deferred policy acquisition costs associated with long-duration contracts and VOBA (collectively policy acquisition costs) over the estimated life of the contracts, generally in proportion to premium revenue recognized based upon the same assumptions used in estimating the liability for future policy benefits. For non-traditional long-duration contracts, we amortize policy acquisition costs over the expected life of the contracts in proportion to estimates of expected gross profits. The estimated life is established at the inception of the contracts or upon acquisition and is based on current persistency assumptions.  Policy acquisition costs, which consist of commissions, premium taxes, and certain underwriting costs related directly to the successful acquisition of a new or renewal insurance contract, are reviewed to determine if they are recoverable from future income, including investment income. Unrecoverable costs are expensed in the period identified.

Risk transfer

In the ordinary course of business, we both purchase (or cede) and sell (or assume) reinsurance protection. We discontinued the purchase of all finite risk reinsurance contracts, as a matter of policy, in 2002. For both ceded and assumed reinsurance, risk transfer requirements must be met in order to use reinsurance accounting, principally resulting in the recognition of cash flows under the contract as premiums and losses. If risk transfer requirements are not met, a contract is to be accounted for as a deposit, typically resulting in the recognition of cash flows under the contract through a deposit asset or liability and not as revenue or expense. To meet risk transfer requirements, a reinsurance contract must include both insurance risk, consisting of underwriting and timing risk, and a reasonable possibility of a significant loss for the assuming entity. We also apply similar risk transfer requirements to determine whether certain commercial insurance contracts should be accounted for as insurance or a deposit. Contracts that include fixed premium (i.e., premium not subject to adjustment based on loss experience under the contract) for fixed coverage generally transfer risk and do not require judgment.

Reinsurance and insurance contracts that include both significant risk sharing provisions, such as adjustments to premiums or loss coverage based on loss experience, and relatively low policy limits, as evidenced by a high proportion of maximum premium assessments to loss limits, can require considerable judgment to determine whether or not risk transfer requirements are met. For such contracts, often referred to as finite or structured products, we require that risk transfer be specifically assessed for each contract by developing expected cash flow analyses at contract inception. To support risk transfer, the cash flow analyses must demonstrate that a significant loss is reasonably possible, such as a scenario in which the ratio of the net present value of losses divided by the net present value of premiums equals or exceeds 110 percent. For purposes of cash flow analyses, we generally use a risk-free rate of return consistent with the expected average duration of loss payments. In addition, to support insurance risk, we must prove the reinsurer's risk of loss varies with that of the reinsured and/or support various scenarios under which the assuming entity can recognize a significant loss.

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To ensure risk transfer requirements are routinely assessed, qualitative and quantitative risk transfer analyses and memoranda supporting risk transfer are developed by underwriters for all structured products. We have established protocols for structured products that include criteria triggering an accounting review of the contract prior to quoting. If any criterion is triggered, a contract must be reviewed by a committee established by each of our segments with reporting oversight, including peer review, from our global Structured Transaction Review Committee.

With respect to ceded reinsurance, we entered into a few multi-year excess of loss retrospectively-rated contracts, principally in 2002. These contracts primarily provided severity protection for specific product divisions. Because traditional one-year reinsurance coverage had become relatively costly, these contracts were generally entered in order to secure a more cost-effective reinsurance program. All of these contracts transferred risk and were accounted for as reinsurance. In addition, we maintain a few aggregate excess of loss reinsurance contracts that were principally entered into prior to 2003, such as the National Indemnity Company (NICO) contracts referred to in the section entitled, “Asbestos and Environmental (A&E)”. We have not purchased any other retroactive ceded reinsurance contracts since 1999.

With respect to assumed reinsurance and insurance contracts, products giving rise to judgments regarding risk transfer were primarily sold by our financial solutions business. Although we have significantly curtailed writing financial solutions business, several contracts remain in-force and principally include multi-year retrospectively-rated contracts and loss portfolio transfers. Because transfer of insurance risk is generally a primary client motivation for purchasing these products, relatively few insurance and reinsurance contracts have historically been written for which we concluded that risk transfer criteria had not been met. For certain insurance contracts that have been reported as deposits, the insured desired to self-insure a risk but was required, legally or otherwise, to purchase insurance so that claimants would be protected by a licensed insurance company in the event of non-payment from the insured.

Reinsurance recoverable

Reinsurance recoverable includes balances due to us from reinsurance companies for paid and unpaid losses and loss expenses and is presented net of a provision for uncollectible reinsurance. The provision for uncollectible reinsurance is determined based upon a review of the financial condition of the reinsurers and other factors. Ceded reinsurance contracts do not relieve our primary obligation to our policyholders. Consequently, an exposure exists with respect to reinsurance recoverable to the extent that any reinsurer is unable or unwilling to meet its obligations or disputes the liabilities assumed under the reinsurance contracts. We determine the reinsurance recoverable on unpaid losses and loss expenses using actuarial estimates as well as a determination of our ability to cede unpaid losses and loss expenses under existing reinsurance contracts.

The recognition of a reinsurance recoverable asset requires two key judgments. The first judgment involves our estimation based on the amount of gross reserves and the percentage of that amount which may be ceded to reinsurers. Ceded IBNR, which is a major component of the reinsurance recoverable on unpaid losses and loss expenses, is generally developed as part of our loss reserving process and, consequently, its estimation is subject to similar risks and uncertainties as the estimation of gross IBNR (refer to “Critical Accounting Estimates – Unpaid losses and loss expenses”). The second judgment involves our estimate of the amount of the reinsurance recoverable balance that we may ultimately be unable to recover from reinsurers due to insolvency, contractual dispute, or for other reasons. Estimated uncollectible amounts are reflected in a provision that reduces the reinsurance recoverable asset and, in turn, shareholders' equity. Changes in the provision for uncollectible reinsurance are reflected in net income.

Although the obligation of individual reinsurers to pay their reinsurance obligations is based on specific contract provisions, the collectability of such amounts requires estimation by management. The majority of the recoverable balance will not be due for collection until sometime in the future, and the duration of our recoverables may be longer than the duration of our direct exposures. Over this period of time, economic conditions and operational performance of a particular reinsurer may impact their ability to meet these obligations and while they may continue to acknowledge their contractual obligation to do so, they may not have the financial resources or willingness to fully meet their obligation to us.

To estimate the provision for uncollectible reinsurance, the reinsurance recoverable must first be determined for each reinsurer. This determination is based on a process rather than an estimate, although an element of judgment must be applied. As part of the process, ceded IBNR is allocated to reinsurance contracts because ceded IBNR is not generally calculated on a contract by contract basis. The allocations are generally based on premiums ceded under reinsurance contracts, adjusted for actual loss experience and historical relationships between gross and ceded losses. If actual premium and loss experience vary materially from historical experience, the allocation of reinsurance recoverable by reinsurer will be reviewed and may change. While such change is unlikely to result in a large percentage change in the provision for uncollectible reinsurance, it could, nevertheless, have a material effect on our net income in the period recorded.

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Generally, we use a default analysis to estimate uncollectible reinsurance. The primary components of the default analysis are reinsurance recoverable balances by reinsurer, net of collateral, and default factors used to estimate the probability that the reinsurer may be unable to meet its future obligations in full. The definition of collateral for this purpose requires some judgment and is generally limited to assets held in a Chubb-only beneficiary trust, letters of credit, and liabilities held by us with the same legal entity for which we believe there is a right of offset. We do not currently include multi-beneficiary trusts. However, we have several reinsurers that have established multi-beneficiary trusts for which certain of our companies are beneficiaries. The determination of the default factor is principally based on the financial strength rating of the reinsurer and a corresponding default factor applicable to the financial strength rating. Default factors require considerable judgment and are determined using the current financial strength rating, or rating equivalent, of each reinsurer as well as other key considerations and assumptions. Significant considerations and assumptions include, but are not necessarily limited to, the following:

• For reinsurers that maintain a financial strength rating from a major rating agency, and for which recoverable balances are considered representative of the larger population (i.e., default probabilities are consistent with similarly rated reinsurers and payment durations conform to averages), the judgment exercised by management to determine the provision for uncollectible reinsurance of each reinsurer is typically limited because the financial rating is based on a published source and the default factor we apply is based on a historical default factor of a major rating agency applicable to the particular rating class. Default factors applied for financial ratings of AAA, AA, A, BBB, BB, B, and CCC, are 0.8 percent, 1.2 percent, 1.7 percent, 4.9 percent, 19.6 percent, 34.0 percent, and 62.2 percent, respectively. Because our model is predicated on the historical default factors of a major rating agency, we do not generally consider alternative factors. However, when a recoverable is expected to be paid in a brief period of time by a highly-rated reinsurer, such as certain property catastrophe claims, a default factor may not be applied;

• For balances recoverable from reinsurers that are both unrated by a major rating agency and for which management is unable to determine a credible rating equivalent based on a parent or affiliated company, we may determine a rating equivalent based on our analysis of the reinsurer that considers an assessment of the creditworthiness of the particular entity, industry benchmarks, or other factors as considered appropriate. We then apply the applicable default factor for that rating class. For balances recoverable from unrated reinsurers for which our ceded reserve is below a certain threshold, we generally apply a default factor of 34.0 percent;

• For balances recoverable from reinsurers that are either insolvent or under regulatory supervision, we establish a default factor and resulting provision for uncollectible reinsurance based on specific facts and circumstances surrounding each company. Upon initial notification of an insolvency, we generally recognize expense for a substantial portion of all balances outstanding, net of collateral, through a combination of write-offs of recoverable balances and increases to the provision for uncollectible reinsurance. When regulatory action is taken on a reinsurer, we generally recognize a default factor by estimating an expected recovery on all balances outstanding, net of collateral. When sufficient credible information becomes available, we adjust the provision for uncollectible reinsurance by establishing a default factor pursuant to information received; and

• For captives and other recoverables, management determines the provision for uncollectible reinsurance based on the specific facts and circumstances.

The following table summarizes reinsurance recoverables and the provision for uncollectible reinsurance for each type of recoverable balance at December 31, 2015:

	Gross Reinsurance Recoverables on Losses and Loss Expenses		Recoverables (net of Usable Collateral)
					Provision for Uncollectible Reinsurance
(in millions of U.S. dollars)
Type
Reinsurers with credit ratings	$	8,399	$	7,601	$	169
Reinsurers not rated	185		131		46
Reinsurers under supervision and insolvent reinsurers	101		97		53
Captives	2,102		393		23
Other - structured settlements and pools	927		922		37
Total	$	11,714	$	9,144	$	328

At December 31, 2015, the use of different assumptions within our approach could have a material effect on the provision for uncollectible reinsurance. To the extent the creditworthiness of our reinsurers were to deteriorate due to an adverse event

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affecting the reinsurance industry, such as a large number of major catastrophes, actual uncollectible amounts could be significantly greater than our provision for uncollectible reinsurance. Such an event could have a material adverse effect on our financial condition, results of operations, and our liquidity. Given the various considerations used to estimate our uncollectible provision, we cannot precisely quantify the effect a specific industry event may have on the provision for uncollectible reinsurance. However, based on the composition (particularly the average credit quality) of the reinsurance recoverable balance at December 31, 2015, we estimate that a ratings downgrade of one notch for all rated reinsurers (i.e., from A to A- or A- to BBB+) could increase our provision for uncollectible reinsurance by approximately $69 million or approximately 0.6 percent of the gross reinsurance recoverable balance, assuming no other changes relevant to the calculation. While a ratings downgrade would result in an increase in our provision for uncollectible reinsurance and a charge to earnings in that period, a downgrade in and of itself does not imply that we will be unable to collect all of the ceded reinsurance recoverable from the reinsurers in question. Refer to Note 5 to the Consolidated Financial Statements for additional information.

Other-than-temporary impairments (OTTI)

Each quarter, we review securities in an unrealized loss position (impaired securities), including fixed maturities, securities lending collateral, equity securities, and other investments, to identify impaired securities to be specifically evaluated for a potential OTTI. Because our investment portfolio is the largest component of consolidated assets and a multiple of shareholders' equity, OTTI could be material to our financial condition and results of operations. Refer to Note 3 d) to the Consolidated Financial Statements for a description of the OTTI process.

Deferred tax assets

Many of our insurance businesses operate in income tax-paying jurisdictions. Our deferred tax assets and liabilities primarily result from temporary differences between the amounts recorded in our consolidated financial statements and the tax basis of our assets and liabilities.  We determine deferred tax assets and liabilities separately for each tax-paying component (an individual entity or group of entities that is consolidated for tax purposes) in each tax jurisdiction. The realization of deferred tax assets depends upon the existence of sufficient taxable income within the carryback or carryforward periods under the tax law in the applicable tax jurisdiction.

At December 31, 2015, our net deferred tax asset was $318 million. Refer to Note 8 to the Consolidated Financial Statements for additional information. At each balance sheet date, management assesses the need to establish a valuation allowance that reduces deferred tax assets when it is more likely than not that all, or some portion, of the deferred tax assets will not be realized.  The valuation allowance is based on all available information including projections of future taxable income from each tax-paying component in each tax jurisdiction, principally derived from business plans and available tax planning strategies.  Projections of future taxable income incorporate several assumptions of future business and operations that are apt to differ from actual experience. The valuation allowance is also based on maintaining our ability and intent to hold our U.S. available for sale fixed maturities to recovery. If our assumptions and estimates that resulted in our forecast of future taxable income for each tax-paying component prove to be incorrect, or future market events occur that prevent our ability to hold our U.S. fixed maturities to recovery, an additional valuation allowance could become necessary, which could have a material adverse effect on our financial condition, results of operations, and liquidity.  At December 31, 2015, the valuation allowance of $38 million reflects management's assessment that it is more likely than not that a portion of the deferred tax asset will not be realized due to the inability of certain foreign subsidiaries to generate sufficient taxable income.

Fair value measurements

Refer to Note 4 to the Consolidated Financial Statements for information on our fair value measurements.

Assumed reinsurance programs involving minimum benefit guarantees under variable annuity contracts

Chubb reinsures various death and living benefit guarantees associated with variable annuities issued primarily in the United States and Japan. We ceased writing this business in 2007. Guarantees which are payable on death are referred to as guaranteed minimum death benefits (GMDB). Guarantees on living benefits (GLB) includes guaranteed minimum income benefits (GMIB) and guaranteed minimum accumulation benefits (GMAB). For further description of this product and related accounting treatment, refer to Note 1 j) to the Consolidated Financial Statements.

Guaranteed living benefits (GLB) derivatives

Our GLB reinsurance is classified as a derivative for accounting purposes and therefore carried at fair value. We believe that the most meaningful presentation of these GLB derivatives is as follows:

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• Estimates of the average modeled value of future cash outflows is recorded as incurred losses (i.e., benefit reserves). Cash inflows or revenue are reported as net premiums earned and changes in the benefit reserves are reflected as Policy benefits expense in the consolidated statements of operations, which is included in underwriting income.

• The incremental difference between the fair value of GLB reinsurance contracts and benefit reserves is reflected in Accounts payable, accrued expenses, and other liabilities in the consolidated balance sheets and related changes in fair value are reflected in Net realized gains (losses) in the consolidated statements of operations.

Determination of GLB fair value

The fair value of GLB reinsurance is estimated using an internal valuation model, which includes current market information and estimates of policyholder behavior from the perspective of a theoretical market participant that would assume these liabilities. All of our treaties contain claim limits, which are factored into the valuation model. The fair value depends on a number of factors, including interest rates, equity markets, credit risk, current account value, market volatility, expected annuitization rates and other policyholder behavior, and changes in policyholder mortality. The model and related assumptions are regularly re-evaluated by management and enhanced, as appropriate, based upon additional experience obtained related to policyholder behavior and availability of more timely market information. Due to the inherent uncertainties of the assumptions used in the valuation models to determine the fair value of these derivative products, actual experience may differ materially from the estimates reflected in our consolidated financial statements.

We intend to hold these derivative contracts to maturity (i.e., the expiration of the underlying liabilities through lapse, annuitization, death, or expiration of the reinsurance contract). To partially offset the risk of changes in the fair value of GLB reinsurance contracts, we invest in derivative hedge instruments. At maturity, the cumulative realized gains and losses (excluding cumulative hedge gains or losses) from fair value changes of GLB reinsurance contracts will net to zero because, over time, the insurance liability will be increased or decreased to equal our obligation.

Determination of GLB and Guaranteed minimum death benefits (GMDB) benefit reserves

Management established benefit reserves based on a long-term benefit ratio (or loss ratio) calculated using assumptions reflecting management’s best estimate of the future short-term and long-term performance of the variable annuity line of business. Despite the long-term nature of the risk, the benefit ratio calculation is impacted by short-term market movements that may be judged by management to be transient. Management regularly examines both qualitative and quantitative analysis, including a review of the differential between the benefit ratio used at the most recent valuation date and the benefit ratio calculated on subsequent dates. Management regularly evaluates its estimates and uses judgment to determine the extent to which assumptions underlying the benefit ratio calculation should be adjusted. For the year ended December 31, 2015, management determined that no change to the benefit ratio was warranted.

For further information on the estimates and assumptions used in determining the fair value of GLB reinsurance, refer to Note 4 to the Consolidated Financial Statements. For a sensitivity discussion of the effect of changes in interest rates, equity indices, and other assumptions on the fair value of GLBs, and the resulting impact on our net income, refer to Item 7A.

Risk Management

We employ a strategy to manage the financial market and policyholder behavior risks embedded in the reinsurance of variable annuity (VA) guarantees. Risk management begins with underwriting a prospective client and guarantee design, with particular focus on protecting our position from policyholder options that, because of anti-selective behavior, could adversely impact our obligation.

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A second layer of risk management is the structure of the reinsurance contracts. All VA guarantee reinsurance contracts include some form of annual or aggregate claim limit(s). For example, for 60 percent of the GMDB portfolio (based on guaranteed value), there is an annual claim limit of 2 percent of account value. The different categories of claim limits are as follows:

Reinsurance program covering	% of total guaranteed value (GV)	% of GV that has additional reinsurance coverage	Additional terms
GMDB with an annual claim limit of 2% of account value (AV)	60% of total GMDB	2% for GLB	N/A
GMDB with claim limit(s) that are a function of underlying GV (varies from 0.4% to 2.0% of GV)	30% of total GMDB	80% for GLB	• 60% of GV subject to annual claim    deductibles(1) of 0.1% to 0.2% of GV • 40% of GV subject to an aggregate claim limit    of approximately $385 million
GMDB and GMAB	10% of total GLB 10% of total GMDB	N/A	• Programs are quota-share (QS) agreements    with QS % decreasing as ratio of AV to GV    decreases:     — QS 100% for ratios between 100% - 75%     — QS 60% for ratios between 75% - 45%     — QS 30% for ratios less than 45% • 35% of GV subject to a per policy claim    deductible of 8.8% of GV for GMAB only(1)
GMIB with an annual claim limit of 10% of GV on over 95% of GV	60% of total GLB	45% for GMDB	• Annual annuitization limit range 17.5% -   30%:     — 55% subject to limit of 30%     — 45% subject to limit of 20% or under • 42% of GV subject to minimum annuity    conversion factors that limits exposure to low    interest rates
GMIB with an aggregate claim limit of $2.0 billion	30% of total GLB	40% for GMDB	•Annual annuitization limit of 20% •60% of GV subject to minimum annuity   conversion factors that limit exposure to low   interest rates •40% of GV subject to an aggregate claim   deductible of 2% of underlying annuity   deposits

⁽¹⁾ Chubb would only pay total annual claims in excess of deductibles.

A third layer of risk management is the hedging strategy which looks to mitigate both long-term economic loss over time as well as dampen income statement volatility. We owned financial market instruments as part of the hedging strategy with a fair value liability of $4 million and $19 million at December 31, 2015 and 2014, respectively. The instruments are substantially collateralized by our counterparties, on a daily basis.

We also limit the aggregate amount of variable annuity reinsurance guarantee risk we are willing to assume. The last substantive transactions were quoted in late 2007. The aggregate number of policyholders is currently decreasing through policyholder withdrawals, annuitizations, and deaths at a rate of 5 percent to 15 percent per annum.

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Note that GLB claims cannot occur for any reinsured policy until it has reached the end of its “waiting period.” As shown in the table below, 55 percent of the policies we reinsure reached the end of their “waiting periods” in 2015 and prior.

Year of first payment eligibility	Percent of living benefit account values
2015 and prior	55	%
2016	7	%
2017	19	%
2018	10	%
2019	2	%
2020 and after	7	%
Total	100	%

The following table presents the historical cash flows under these policies for the periods indicated. The amounts represent accrued past premium received and claims paid, split by benefit type.

(in millions of U.S. dollars)	2015						2014						2013
	GMDB		GLB		Total		GMDB		GLB		Total		GMDB		GLB		Total
Premium received	$	61	$	121	$	182	$	71	$	138	$	209	$	77	$	149	$	226
Less paid claims	28		16		44		39		13		52		63		23		86
Net cash received (paid)	$	33	$	105	$	138	$	32	$	125	$	157	$	14	$	126	$	140

Collateral

Chubb holds collateral on behalf of most of its clients in the form of qualified assets in trust or letters of credit, typically in an amount sufficient for the client to obtain statutory reserve credit for the reinsurance.  The timing of the calculation and amount of the collateral varies by client according to the particulars of the reinsurance treaty and the statutory reserve guidelines of the client's domicile.

Goodwill impairment

Goodwill, which represents the excess of acquisition cost over the estimated fair value of net assets acquired, was $4.8 billion and $4.9 billion at December 31, 2015 and 2014, respectively. During 2015, our goodwill balance decreased 2 percent, primarily due to the negative impact of foreign exchange, partially offset by an acquisition. Goodwill is not amortized but is subject to a periodic evaluation for impairment at least annually, or earlier if there are any indications of possible impairment. Impairment is tested at the reporting unit level. Goodwill is assigned to applicable reporting units of acquired entities at acquisition. The most significant reporting units are:

• New York Life's Korea operations and Hong Kong operations acquired in 2011;

• Rain and Hail Insurance Service, Inc. (Rain and Hail) acquired in 2010;

• North American division of Combined Insurance acquired in 2008;

• Domestic and International divisions of ACE INA acquired in 1999, including subsequent domestic and international acquisitions; and

• ACE Tempest Re's businesses acquired in 1996 and 1998.

The impairment evaluation first uses a qualitative assessment to determine whether it is more likely than not (i.e., more than a 50 percent probability) that the fair value of a reporting unit is greater than its carrying amount. If a reporting unit fails this qualitative assessment, a quantitative analysis is then used. The quantitative analysis is a two-step process in which an initial assessment for potential impairment is performed and, if a potential impairment is present, the amount of impairment is measured and recorded.

Other reporting units from smaller acquisitions are also assessed annually. Based on our impairment testing for 2015, we determined no impairment was required and none of our reporting units were at risk for impairment.

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In assessing the fair value of a reporting unit, we make assumptions and estimates about the profitability attributable to our reporting units, including:

• short-term and long-term growth rates; and

• estimated cost of equity and changes in long-term risk-free interest rates.

If our assumptions and estimates made in assessing the fair value of acquired entities change, we could be required to write-down the carrying value of goodwill which could be material to our results of operations in the period the charge is taken.

Consolidated Operating Results – Years Ended December 31, 2015, 2014, and 2013

										% Change
(in millions of U.S. dollars, except for percentages)	2015			2014			2013			2015 vs. 2014		2014 vs. 2013
Net premiums written(1)	$	17,713		$	17,799		$	17,025		(0.5	)%	4.6	%
Net premiums earned(2)	17,213			17,426			16,613			(1.2	)%	4.9	%
Net investment income	2,194			2,252			2,144			(2.6	)%	5.1	%
Net realized gains (losses)	(420		)	(507		)	504			(17.2	)%	NM
Total revenues	18,987			19,171			19,261			(1.0	)%	(0.5	)%
Losses and loss expenses	9,484			9,649			9,348			(1.7	)%	3.2	%
Policy benefits(3)	543			517			515			5.0	%	0.4	%
Policy acquisition costs	2,941			3,075			2,659			(4.4	)%	15.6	%
Administrative expenses	2,270			2,245			2,211			1.1	%	1.5	%
Interest expense	300			280			275			7.1	%	1.8	%
Other (income) expense(3)	(51		)	(190		)	(80		)	(73.2	)%	NM
Amortization of intangible assets	171			108			95			58.3	%	13.7	%
Chubb integration expenses	33			—			—			NM		—	%
Total expenses	15,691			15,684			15,023			—	%	4.4	%
Income before income tax	3,296			3,487			4,238			(5.5	)%	(17.7	)%
Income tax expense	462			634			480			(27.1	)%	32.1	%
Net income	$	2,834		$	2,853		$	3,758		(0.7	)%	(24.1	)%
NM – not meaningful

⁽¹⁾  In 2015 and 2014 net premiums written increased $860 million or 5.1%, and $952 million or 5.7%, respectively, in constant dollars. Amounts are calculated by translating prior period results using the same local currency rates as the current period.

⁽²⁾  In 2015 and 2014 net premiums earned increased $714 million or 4.3%, and $991 million or 6.0%, respectively, in constant dollars. Amounts are calculated by translating prior period results using the same local currency rates as the current period.

⁽³⁾  Other (income) expense includes (gains) losses from fair value changes in separate account assets that do not qualify for separate account reporting under GAAP. In 2015, 2014, and 2013 these (gains) losses were $19 million, $(2) million, and $(16) million, respectively. The offsetting movement in the separate account liabilities is included in Policy benefits.

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The following tables present a breakdown of consolidated net premiums written:

										% Change
(in millions of U.S. dollars, except for percentages)	2015			2014			2013			2015 vs. 2014		2014 vs. 2013
Commercial P&C (retail and wholesale)	$	8,017		$	8,235		$	7,887		(2.7	)%	4.4	%
Personal and small commercial lines	2,995			2,292			1,909			30.7	%	20.0	%
Reinsurance	828			935			991			(11.4	)%	(5.7	)%
Property, casualty, and all other	11,840			11,462			10,787			3.3	%	6.3	%
Agriculture	1,346			1,590			1,627			(15.3	)%	(2.3	)%
Personal accident (A&H)	3,548			3,735			3,655			(5.0	)%	2.2	%
Life	979			1,012			956			(3.2	)%	5.9	%
Total consolidated	$	17,713		$	17,799		$	17,025		(0.5	)%	4.6	%
Total consolidated - constant dollars (C$) (1)				$	16,853		$	16,847		5.1	%	5.7%
	2015 % of Total			2014 % of Total			2013 % of Total
Commercial P&C (retail and wholesale)	45		%	46		%	46		%
Personal and small commercial lines	17		%	13		%	11		%
Reinsurance	5		%	5		%	6		%
Property, casualty, and all other	67		%	64		%	63		%
Agriculture	8		%	9		%	10		%
Personal accident (A&H)	19		%	21		%	21		%
Life	6		%	6		%	6		%
Total consolidated	100		%	100		%	100		%

⁽¹⁾  In constant dollars. Amounts are calculated by translating prior period results using the same local currency rates as the comparable current period.

Net premiums written reflect the premiums we retain after purchasing reinsurance protection. Consolidated net premiums written decreased less than one percent in 2015. On a constant-dollar basis, net premiums written increased 5.1 percent ($860 million).

• Net premiums written in our Insurance – North American P&C segment increased $677 million in constant dollars reflecting solid renewal retention and new business in our risk management, A&H, surety, retail and wholesale casualty, Commercial Risk Services (CRS), and personal lines divisions. These increases were partially offset by declines in our retail and wholesale property divisions, as well as in our retail casualty business, reflecting a more competitive market and rate decreases, and lower excess of loss premiums for the 2014 property catastrophe program of $32 million. Net premiums written also increased due to the acquisition of Fireman’s Fund high net worth personal lines business in April 2015 which added $561 million of growth. Included in premiums from Fireman’s Fund is $252 million of non-recurring unearned premium reserves recognized as written premiums at the date of purchase. Excluding the Fireman's Fund acquisition, net premiums written increased 1.3 percent, or 1.9 percent in constant dollars.

• Net premiums written in our Insurance – Overseas General segment increased $441 million in constant dollars reflecting organic growth across most operations. Growth in our retail operations in personal and P&C product lines was from new business writings. Included in the increase in net premiums written were contributions from the acquisition of Itaú Seguros in October 2014 and Samaggi in April 2014 which added $273 million of growth to premiums in constant dollars.

• Net premiums written in our Life segment increased $71 million in constant dollars due to new business growth in our supplemental A&H businesses and our international life business, primarily in Asia, tempered by a decline in our variable annuity reinsurance business, as there is currently no new business being written.

• Net premiums written in our Global Reinsurance segment decreased $85 million in constant dollars primarily due to lower production from competitive market conditions. The decline was partially offset by new business written, primarily in our U.S. automobile business.

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• Net premiums written in our Insurance – North American Agriculture segment decreased $244 million in 2015 due to lower commodity base prices and lower premium retention as a result of the premium-sharing formulas with the U.S. government.

Consolidated net premiums written increased 4.6 percent in 2014. In constant dollars, net premiums written increased 5.7 percent ($952 million).

• Net premiums written in our Insurance – North American P&C segment increased $368 million in constant dollars from growth across a broad range of our product portfolio throughout our ACE USA retail and our wholesale divisions, as well as in our Commercial Risk Services and ACE Private Risk Services divisions, primarily reflecting strong renewal retention and new business.

• Net premiums written in our Insurance – Overseas General segment increased $600 million in constant dollars reflecting new business writings in our retail operations in all product lines - personal lines, A&H, and P&C and growth of $310 million from the acquisitions of Fianzas Monterrey in April 2013, ABA Seguros in May 2013, Samaggi in April 2014, and Itaú Seguros in October 2014.

• Net premiums written in our Life segment increased $78 million in constant dollars due to new business growth in our Asian markets.

• Net premiums written in our Global Reinsurance segment decreased $57 million in constant dollars due to the non-renewal of a large workers' compensation treaty, partially offset by new business written.

• Net premiums written in our Insurance – North American Agriculture segment decreased $37 million primarily due to lower Multiple Peril Crop Insurance (MPCI) revenues reflecting lower commodity prices, partially offset by higher premium retention as a result of the non-renewal of a third-party proportional reinsurance agreement.

Net premiums earned for short-duration contracts, typically P&C contracts, generally reflect the portion of net premiums written that were recorded as revenues for the period as the exposure periods expire. Net premiums earned for long-duration contracts, typically traditional life contracts, generally are recognized as earned when due from policyholders. Net premiums earned decreased 1.2 percent in 2015 primarily reflecting the adverse impact of foreign exchange. On a constant-dollar basis, net premiums earned increased 4.3 percent due to the same factors driving the increase in net premiums written as described above. Net premiums earned increased 4.9 percent in 2014, or 6.0 percent in constant dollars, primarily in our Insurance – Overseas General, Insurance – North American P&C, and Life segments as described above. Our Global Reinsurance segment also reported an increase in net premiums earned primarily from the shorter earning period on certain of the new business written including two non-recurring short-term treaties. Net premiums earned decreased in our Insurance – North American Agriculture segment from lower net premiums written as described above.

In evaluating our segments excluding Life, we use the combined ratio, the loss and loss expense ratio, the policy acquisition cost ratio, and the administrative expense ratio. We calculate these ratios by dividing the respective expense amounts by net premiums earned. We do not calculate these ratios for the Life segment as we do not use these measures to monitor or manage that segment. The combined ratio is determined by adding the loss and loss expense ratio, the policy acquisition cost ratio, and the administrative expense ratio. A combined ratio under 100 percent indicates underwriting income and a combined ratio exceeding 100 percent indicates underwriting loss.

The following table presents the components of GAAP combined ratio as well as a reconciliation of GAAP combined ratio to P&C combined ratio. The P&C combined ratio is a non-GAAP financial measure and includes the impact of gains and losses on crop derivatives. These derivatives were purchased to provide economic benefit, in a manner similar to reinsurance protection, in the event that a significant decline in commodity pricing impacts underwriting results. We view gains and losses on these derivatives as part of the results of our underwriting operations.

	2015		2014		2013
Loss and loss expense ratio	58.1	%	58.7	%	59.6	%
Policy acquisition cost ratio	16.1	%	16.8	%	15.7	%
Administrative expense ratio	13.1	%	12.6	%	12.7	%
GAAP combined ratio	87.3	%	88.1	%	88.0	%
(Gains) losses on crop derivatives	0.1	%	(0.4	)%	—
P&C combined ratio	87.4	%	87.7	%	88.0	%

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The following table presents the impact of catastrophe losses and related reinstatement premiums and prior period reserve development on our consolidated loss and loss expense ratio, including gains and losses on crop derivatives: 

	2015		2014		2013
Loss and loss expense ratio, including gains and losses on crop derivatives	58.2	%	58.3	%	59.6	%
Catastrophe losses and related reinstatement premiums	(2.1	)%	(1.9	)%	(1.5	)%
Prior period development	3.6	%	3.4	%	3.7	%
Loss and loss expense ratio, adjusted	59.7	%	59.8	%	61.8	%

Total net pre-tax catastrophe losses, excluding reinstatement premiums, were $321 million in 2015, compared with $291 million in 2014 and $230 million in 2013. Catastrophe losses in 2015 were primarily related to severe weather-related events in the U.S. and Asia, a chemical storage facility explosion in Tianjin, China, a hailstorm in Australia, and flooding and an earthquake in Chile. Catastrophe losses in 2014 were primarily related to severe weather-related events in the U.S., Japan, and Australia; flooding and hailstorms in Europe; and a hurricane in Mexico. Catastrophe losses in 2013 were primarily from flooding in Canada and Australia and severe weather-related events in the U.S. The adjusted loss and loss expense ratio remained relatively flat in 2015. In 2014, the adjusted loss and loss expense ratio decreased due to underwriting actions improving loss ratios on several portfolios and higher losses in 2013 in our MPCI program.

Prior period development arises from changes to loss estimates recognized in the current year that relate to loss events that occurred in previous calendar years and excludes the effect of losses from the development of earned premium from previous accident years. We experienced net favorable prior period development of $546 million in 2015, $527 million in 2014, and $530 million in 2013, which includes an asbestos and environmental (A&E) and other run-off charge of $170 million, $215 million, and $166 million, respectively. Refer to “Prior Period Development” for additional information.

Policy acquisition costs consist of commissions, premium taxes, and certain underwriting costs related directly to the successful acquisition of a new or renewal insurance contract. Administrative expenses include all other operating costs. Our policy acquisition ratio decreased in 2015 due to the impact of normal initial purchase accounting adjustments related to our acquisition of Fireman’s Fund in our Insurance – North American P&C segment. The non-recurring unearned premium reserves (UPR) transfer, discussed in our Insurance – North American P&C segment, benefited the policy acquisition cost ratio by 0.7 percentage points. Our policy acquisition cost ratio increased in 2014 primarily due to the normal impact of initial year purchase accounting adjustments related to our Mexican acquisitions which favorably impacted the 2013 ratio. As a result of purchase accounting requirements, the unearned premiums at the date of purchase related to the businesses acquired are recognized over the remaining coverage period with no expense for the associated historical acquisition costs that were incurred to underwrite those policies.

Our administrative expense ratio increased in 2015 primarily due to increased spending to support growth and the integration costs associated with the Fireman’s Fund acquisition. Our administrative expense ratio decreased slightly in 2014 as growth in net premiums earned outpaced growth in administrative expenses, partially offset by the favorable impact of a $29 million prior year legal settlement.

Chubb integration expenses were $33 million for 2015 and include legal and professional fees and all other external costs directly related to the integration activities of the Chubb acquisition.

Our effective income tax rate, which we calculate as income tax expense divided by income before income tax, is dependent upon the mix of earnings from different jurisdictions with various tax rates. A change in the geographic mix of earnings would change the effective income tax rate. Our effective income tax rate was 14.0 percent in 2015, compared with 18.2 percent and 11.3 percent in 2014 and 2013, respectively. The effective income tax rate in 2015 is lower compared to 2014 primarily due to a $115 million change to deferred tax assets in 2014 that resulted from the decline in the book value of certain foreign subsidiaries, related to unrealized foreign exchange losses. The effective income tax rate in 2014 is higher compared to 2013 primarily due to both net realized losses and a lower percentage of operating earnings being generated in lower tax paying jurisdictions as well as the change to deferred tax assets noted above. The lower tax rates attributed to our foreign operations primarily reflects lower corporate tax rates that prevail outside of the U.S. During 2015, approximately 69 percent of our total pre-tax income was tax effected based on these lower rates compared with 66 percent and 73 percent in 2014 and 2013, respectively. The significant jurisdictions outside of the U.S. include the U.K., Switzerland, and Bermuda with effective federal income tax rates in those countries of 20.25 percent, 7.83 percent, and 0.0 percent, respectively.

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Prior Period Development

The following table summarizes (favorable) and adverse prior period development (PPD) by segments. Long-tail lines include lines such as workers' compensation, general liability, and professional liability; while short-tail lines include lines such as most property lines, energy, personal accident, aviation, marine (including associated liability-related exposures) and agriculture.

Years Ended December 31 (in millions of U.S. dollars, except for percentages)	Long-tail			Short-tail			Total			% of net unpaid reserves (1)
2015
Insurance – North American P&C – active	$	(169	)	$	(70	)	$	(239	)	1.5	%
Insurance – North American P&C – run-off(2)	200			—			200			1.2	%
Insurance – North American Agriculture	—			(45		)	(45		)	7.8	%
Insurance – Overseas General	(166		)	(177		)	(343		)	4.2	%
Global Reinsurance	(106		)	(13		)	(119		)	6.4	%
Total	$	(241	)	$	(305	)	$	(546	)	2.0	%
2014
Insurance – North American P&C – active	$	(298	)	$	(56	)	$	(354	)	2.2	%
Insurance – North American P&C – run-off(2)	247			—			247			1.6	%
Insurance – North American Agriculture	—			34			34			6.8	%
Insurance – Overseas General	(181		)	(210		)	(391		)	4.8	%
Global Reinsurance	(52		)	(11		)	(63		)	2.9	%
Total	$	(284	)	$	(243	)	$	(527	)	2.0	%
2013
Insurance – North American P&C – active	$	(221	)	$	(106	)	$	(327	)	2.1	%
Insurance – North American P&C – run-off(2)	193			—			193			1.2	%
Insurance – North American Agriculture	—			(13		)	(13		)	4.0	%
Insurance – Overseas General	(127		)	(172		)	(299		)	3.8	%
Global Reinsurance	(53		)	(31		)	(84		)	3.6	%
Total	$	(208	)	$	(322	)	$	(530	)	2.0	%

⁽¹⁾  Calculated based on the segment's total beginning of period net unpaid loss and loss expenses reserves.

⁽²⁾  Brandywine Holdings and Westchester Specialty operations in respect of 1996 and prior years.

For a discussion of significant prior period movements by segment, refer to Note 7 to the Consolidated Financial Statements.

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Segment Operating Results – Years Ended December 31, 2015, 2014, and 2013

We operate through five business segments: Insurance – North American P&C, Insurance – North American Agriculture, Insurance – Overseas General, Global Reinsurance, and Life. For additional information refer to “Segment Information” under Item 1. The discussions that follow include tables that show our segment operating results for the years ended December 31, 2015, 2014, and 2013.

Insurance – North American

Insurance – North American P&C

The Insurance – North American P&C segment comprises our operations in the U.S., Canada, and Bermuda. This segment includes our retail divisions: ACE USA (including ACE Canada), ACE Commercial Risk Services, and ACE Private Risk Services, which includes the Fireman's Fund high net worth personal lines business acquired effective April 1, 2015; our wholesale and specialty divisions: ACE Westchester and ACE Bermuda; and various run-off operations, including Brandywine Holdings Corporation (Brandywine).

										% Change
(in millions of U.S. dollars, except for percentages)	2015			2014			2013			2015 vs. 2014		2014 vs. 2013
Net premiums written	$	6,907		$	6,263		$	5,915		10.3	%	5.9	%
Net premiums earned	6,582			6,107			5,721			7.8	%	6.8	%
Losses and loss expenses	4,450			4,086			3,776			8.9	%	8.2	%
Policy acquisition costs	600			634			597			(5.4	)%	6.2	%
Administrative expenses	748			678			601			10.3	%	12.8	%
Underwriting income	784			709			747			10.6	%	(5.1	)%
Net investment income	1,056			1,085			1,021			(2.7	)%	6.3	%
Net realized gains (losses)	(108		)	(67		)	72			61.2	%	NM
Interest expense	2			9			5			(77.8	)%	80.0	%
Other (income) expense	(29		)	(101		)	(58		)	(71.3)%		74.1%
Amortization of intangible assets	78			—			—			NM		—	%
Income tax expense	316			306			347			3.3	%	(11.8	)%
Net income	$	1,365		$	1,513		$	1,546		(9.8	)%	(2.1	)%
Loss and loss expense ratio	67.6		%	66.9		%	66.0		%
Policy acquisition cost ratio	9.1		%	10.4		%	10.4		%
Administrative expense ratio	11.4		%	11.1		%	10.5		%
Combined ratio	88.1		%	88.4		%	86.9		%

Net premiums written increased in 2015 due to growth in our risk management, A&H, surety, and professional lines of business in our retail division reflecting solid renewal retention and new business. There was also growth in our wholesale casualty and professional lines businesses. Our small specialty division (Commercial Risk Services, or CRS) grew due to higher new business reflecting increased submission activity and the introduction of new products, as well as strong premium renewal retention. Our personal lines division, specifically products offered through ACE Private Risk Services, also generated higher premiums primarily due to the Fireman's Fund acquisition. Net premiums were favorably impacted by lower excess of loss premiums ceded under our 2014 catastrophe reinsurance program of $32 million. These increases were partially offset by declines in our retail and wholesale property divisions and in our retail casualty business reflecting a more competitive market and rate decreases. The acquisition of Fireman's Fund high net worth personal lines business in April 2015 added $561 million of growth to premiums. Excluding the Fireman's Fund acquisition, net premiums written increased 1.3 percent. Foreign exchange adversely impacted growth by $34 million (0.6 percentage points). Net premiums written in 2015 included $252 million of non-recurring unearned premium reserves (UPR) recognized as written premiums at the date of the Fireman's Fund acquisition. Underwriting income for the year included a benefit of $100 million related to the initial UPR transfer as unearned premiums at the date of the transfer are recognized over the remaining coverage period with no associated expense for the historical acquisition costs. These costs are eliminated in purchase accounting. This underwriting benefit was partially offset by the amortization of the intangible asset related to this UPR of $71 million for a pre-tax net income impact of $30 million ($22 million after-tax).

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Net premiums written increased in 2014 in our ACE USA retail division from growth across a broad range of our product portfolio, including our risk management, general and specialty casualty, A&H, professional risk, and surety lines of business reflecting strong renewal retention and new business. This growth was partially offset by reductions in our retail property division reflecting a more competitive market and rate decreases. Net premiums written grew in our wholesale division from higher production in our casualty, property, and professional lines of business, and in our Commercial Risk Services division, primarily due to growth in our specialty and program business. Our personal lines division contributed to the increase in net premiums written due to higher production in the homeowners, automobile and umbrella business offered through ACE Private Risk Services. Net premiums written in 2014 were favorably impacted by lower excess of loss premiums ceded under our 2014 catastrophe reinsurance program of $32 million.

Net premiums earned increased in 2015 and 2014 primarily due to the increase in net premiums written as described above.

The following tables present a line of business breakdown of Insurance – North American P&C net premiums earned:

										% Change
(in millions of U.S. dollars, except for percentages)	2015			2014			2013			2015 vs. 2014		2014 vs. 2013
Commercial P&C (retail and wholesale)	$	4,789		$	4,785		$	4,524		0.1	%	5.8	%
Personal and small commercial lines	1,373			909			812			51.1	%	11.9	%
Personal accident (A&H)	420			413			385			1.6	%	7.3	%
Net premiums earned	$	6,582		$	6,107		$	5,721		7.8	%	6.8	%
	2015 % of Total			2014 % of Total			2013 % of Total
Commercial P&C (retail and wholesale)	73		%	78		%	79		%
Personal and small commercial lines	21		%	15		%	14		%
Personal accident (A&H)	6		%	7		%	7		%
Net premiums earned	100		%	100		%	100		%

The following table presents the impact of catastrophe losses and related reinstatement premiums and prior period reserve development on our loss and loss expense ratio:

	2015		2014		2013
Loss and loss expense ratio, as reported	67.6	%	66.9	%	66.0	%
Catastrophe losses and related reinstatement premiums	(2.3	)%	(2.2	)%	(1.7	)%
Prior period development	0.7	%	1.9	%	2.5	%
Loss and loss expense ratio, adjusted	66.0	%	66.6	%	66.8	%

Net pre-tax catastrophe losses, excluding reinstatement premiums, were $148 million in 2015, compared with $132 million in 2014 and $94 million in 2013. Catastrophe losses in 2015 were primarily from severe-weather related events in the U.S., including the California wildfires, Mexican hurricane, and civil unrest in Baltimore, Maryland. Catastrophe losses in 2014 were primarily from severe weather-related events in the U.S., Bermuda and Australia, as well as a hurricane in Mexico. Catastrophe losses in 2013 were primarily from flooding in Canada and severe weather-related events in the U.S. Net favorable prior period development was $39 million in 2015, compared with $107 million in 2014 and $134 million in 2013. Refer to the “Prior Period Development” section for additional information. The adjusted loss and loss expense ratio decreased 0.6 percentage points in 2015 reflecting the favorable impact of the acquisition of Fireman's Fund personal lines business which carries a lower loss ratio. Excluding the impact of the acquisition, the adjusted loss and loss expense ratio increased 0.3 percentage points due to lower excess of loss premiums ceded in the prior year from the 2014 catastrophe reinsurance program. The adjusted loss and loss expense ratio decreased 0.2 percentage points in 2014 due to lower loss ratios in several of our lines where a combination of the execution of detailed portfolio management plans, product mix and earned rate changes resulted in improved current accident year loss ratio performance. The improvement was partially offset by higher non-catastrophe large losses during the year.

The policy acquisition cost ratio decreased 1.3 percentage points in 2015 primarily due to the impact of normal initial year purchase accounting adjustments related to our Fireman's Fund acquisition. As a result of purchase accounting requirements, the unearned premiums at the date of the purchase related to the business acquired are recognized over the remaining coverage

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period with no expense for the associated historical acquisition costs that were incurred to write those policies, thereby favorably impacting the policy acquisition ratio by 1.4 percentage points. Excluding the Fireman's Fund acquisition, the policy acquisition cost ratio increased slightly due to a change in the mix of business. The policy acquisition cost ratio remained flat in 2014 compared to 2013.

The administrative expense ratio increased 0.3 percentage points in 2015 due to the integration costs associated with the Fireman's Fund acquisition as well as increased spending to support growth. The administrative expense ratio was higher in 2014 compared to the prior year ratio which included a 0.5 point favorable impact related to a $29 million legal settlement. Excluding the impact of the legal settlement, the administrative expense ratio remained relatively flat compared with the prior year.

Insurance – North American Agriculture

The Insurance – North American Agriculture segment comprises our North American based businesses that provide a variety of coverages in the U.S. and Canada including crop insurance, primarily MPCI and crop-hail through Rain and Hail as well as farm and ranch and specialty P&C commercial insurance products and services through our ACE Agribusiness unit.

										% Change
(in millions of U.S. dollars, except for percentages)	2015			2014			2013			2015 vs. 2014		2014 vs. 2013
Net premiums written	$	1,346		$	1,590		$	1,627		(15.3	)%	(2.3	)%
Net premiums earned	1,364			1,526			1,678			(10.6	)%	(9.1	)%
Losses and loss expenses (1)	1,097			1,300			1,525			(15.6	)%	(14.8	)%
Policy acquisition costs	69			81			53			(14.8	)%	52.8	%
Administrative expenses	1			9			11			(88.9	)%	(18.2	)%
Underwriting income	197			136			89			44.9%		52.8%
Net investment income	23			26			26			(11.5	)%	—
Net realized gains (losses) (1)	1			3			2			(66.7	)%	50.0	%
Interest expense	—			—			1			—		NM
Other (income) expense	1			2			—			(50.0	)%	NM
Amortization of intangible assets	30			31			32			(3.2	)%	(3.1	)%
Income tax expense	40			33			20			21.2	%	65.0%
Net income	$	150		$	99		$	64		51.5%		54.7%
Loss and loss expense ratio	80.4		%	85.2		%	90.9		%
Policy acquisition cost ratio	5.1		%	5.3		%	3.2		%
Administrative expense ratio	—		%	0.6		%	0.6		%
Combined ratio	85.5		%	91.1		%	94.7		%

⁽¹⁾ Gains (losses) on crop derivatives were $(9) million and $51 million in 2015 and 2014, respectively. These gains (losses) are reclassified from Net realized gains (losses) to Losses and loss expenses for purposes of presenting Insurance – North American Agriculture underwriting income. Refer to Note 10 and Note 16 to the Consolidated Financial Statements for more information on these derivatives.

Net premiums written decreased in 2015 primarily due to lower commodity base prices used to price the 2015 MPCI policies and lower premium retention as a result of the premium-sharing formulas with the U.S. government. Under the government's crop insurance profit and loss calculation formulas, we retained more premiums in 2014 as losses were higher compared to 2015.

Net premiums written decreased in 2014 principally due to lower commodity base prices and lower premium retention for the MPCI business as a result of the premium-sharing formulas with the U.S. government in 2014 for the MPCI business. Under the government's crop insurance profit and loss calculation formula, we retained more premiums in 2013 as losses were higher. The decrease in net premiums written was partially offset by higher premium retention as a result of the non-renewal of a third-party proportional reinsurance agreement.

Net premiums earned decreased in 2015 and 2014 primarily due to the factors described above.

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The following table presents the impact of catastrophe losses and related reinstatement premiums and prior period reserve development on our loss and loss expense ratio:

	2015		2014		2013
Loss and loss expense ratio, as reported	80.4	%	85.2	%	90.9	%
Catastrophe losses and related reinstatement premiums	(0.7	)%	(0.8	)%	(0.4	)%
Prior period development	3.1	%	(2.6	)%	0.8	%
Loss and loss expense ratio, adjusted	82.8	%	81.8	%	91.3	%

Net pre-tax catastrophe losses, excluding reinstatement premiums, were $9 million in 2015, compared with $13 million in 2014 and $7 million in 2013. Net prior period development was $45 million favorable in 2015, compared with $34 million unfavorable in 2014 and $13 million favorable in 2013. For 2015 the prior period development amount included a decrease in incurred losses of $42 million for lower than expected MPCI losses for the 2014 crop year, partially offset by a $6 million decrease in net premiums earned related to the government's crop insurance profit and loss calculation formula. For 2014, the prior period development amount includes an increase in incurred losses of $64 million for higher than expected MPCI losses for the 2013 crop year, as well as $26 million of favorable increase in net premiums earned related to the government's crop insurance profit and loss calculation formula. Refer to the “Prior Period Development” section for additional information. The adjusted loss and loss expense ratio increased 1.0 percentage point in 2015 principally due to relatively flat unallocated loss adjustment expenses with lower earned premiums. The adjusted loss and loss expense ratio declined 9.5 percentage points in 2014 due to lower commodity prices in the prior year that resulted in higher losses in our MPCI program in 2013. The lower ratio in 2014 also reflected the benefit of our crop derivatives entered into in 2014.

The policy acquisition cost ratio decreased 0.2 percentage points in 2015 primarily due to higher cede commission on third-party reinsurance and lower agent profit sharing commission. The policy acquisition cost ratio increased 2.1 percentage points in 2014, primarily due to less net premiums earned in our MPCI business as a result of lower commodity prices, a reduction in ceded commission benefits on third-party reinsurance primarily due to the non-renewal of a third-party proportional reinsurance agreement, and lower agent commission accruals in 2013.

The administrative expense ratio decreased 0.6 percentage points in 2015 primarily due to higher A&O reimbursements on the MPCI business. The administrative expense ratio remained flat in 2014 compared with 2013.

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Insurance – Overseas General

The Insurance – Overseas General segment comprises ACE International, ACE Global Markets (AGM), and the international supplemental A&H business of Combined Insurance. ACE International comprises our retail commercial P&C, A&H, and personal lines businesses serving territories outside the U.S., Bermuda, and Canada.  AGM comprises the segment’s London-based wholesale insurance business for excess and surplus lines; this includes Lloyd's of London Syndicate 2488. The reinsurance operations of AGM are included in the Global Reinsurance segment.

										% Change
(in millions of U.S. dollars, except for percentages)	2015			2014			2013			2015 vs. 2014		2014 vs. 2013
Net premiums written(1)	$	6,634		$	6,999		$	6,520		(5.2	)%	7.4	%
Net premiums earned	6,471			6,805			6,333			(4.9	)%	7.5	%
Losses and loss expenses	3,052			3,189			3,062			(4.3	)%	4.1	%
Policy acquisition costs	1,581			1,625			1,453			(2.7	)%	11.8	%
Administrative expenses	997			1,026			1,008			(2.8	)%	1.8	%
Underwriting income(2)	841			965			810			(12.8	)%	19.1	%
Net investment income	534			545			539			(2.0	)%	1.1	%
Net realized gains (losses)	(38		)	(78		)	18			(51.3	)%	NM
Interest expense	8			6			5			33.3	%	20.0	%
Other (income) expense	(16		)	(63		)	(21		)	(74.6	)%	200.0	%
Amortization of intangible assets	61			74			60			(17.6	)%	23.3	%
Income tax expense	232			378			222			(38.6	)%	70.3	%
Net income	$	1,052		$	1,037		$	1,101		1.4	%	(5.8	)%
Loss and loss expense ratio	47.2		%	46.9		%	48.4		%
Policy acquisition cost ratio	24.4		%	23.9		%	22.9		%
Administrative expense ratio	15.4		%	15.0		%	15.9		%
Combined ratio	87.0		%	85.8		%	87.2		%

⁽¹⁾ For the year ended December 31, 2015 and 2014, net premiums written increased $441 million or 7.1% and $601 million or 9.4% in constant dollars, respectively. Amounts are calculated by translating prior period results using the same local currency rates as the comparable current period. 

⁽²⁾ For the year ended December 31, 2015 and 2014, underwriting income decreased $22 million or (2.5)% and increased $166 million or 20.7%, in constant dollars, respectively. Amounts are calculated by translating prior period results using the same local currency rates as the comparable current period.

Net premiums written decreased 5.2 percent in 2015 primarily reflecting the adverse impact of foreign exchange which reduced growth by $807 million or 11.5 percent. On a constant-dollar basis, net premiums written increased 7.1 percent in 2015, reflecting organic growth across most operations. Growth in our retail operations for personal and P&C product lines was from new business writings. Included in the increase in net premiums written were contributions from the acquisitions of Itaú Seguros in October 2014 and Samaggi in April 2014 which added $273 million of premiums.

Net premiums written increased 7.4 percent in 2014, or 9.4 percent in constant dollars, from new business writings in our retail operations in all product lines – personal lines, A&H, and P&C. The increase in personal lines reflected growth in all regions, and A&H growth was driven by strong results in all regions except Europe. P&C growth was driven primarily by new business writings in Asia and Latin America. In addition, the acquisitions of Fianzas Monterrey in April 2013, ABA Seguros in May 2013, Samaggi, and Itaú Seguros added $310 million of growth to premiums. Foreign exchange adversely impacted growth by $122 million on a constant-dollar basis.

Net premiums earned decreased in 2015 primarily reflecting the adverse impact of foreign exchange. Net premiums earned increased in 2015 and 2014 in constant dollars, due to the same factors driving the increase in net premiums written as described above.

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Insurance – Overseas General conducts business internationally and in most major foreign currencies. The following tables present a line of business and regional breakdown of Insurance – Overseas General net premiums earned:

														% Change
(in millions of U.S. dollars, except for percentages)	2015			2014			2013			C$(1) 2014		C$(1) 2013		2015 vs. 2014		2014 vs. 2013		C$(1) 2015 vs. 2014		C$(1) 2014 vs. 2013
Line of Business
Commercial P&C (retail and wholesale)	$	3,107		$	3,226		$	3,113		$	2,914	$	3,093	(3.7	)%	3.6%		6.6	%	4.3	%
Personal and small commercial lines	1,298			1,295			1,038			1,106		987		0.2	%	24.8%		17.4	%	31.2%
Personal accident (A&H)	2,066			2,284			2,182			1,999		2,129		(9.5	)%	4.7%		3.3	%	7.3	%
Net premiums earned	$	6,471		$	6,805		$	6,333		$	6,019	$	6,209	(4.9	)%	7.5%		7.5	%	9.6	%
Region
Europe/U.K.(2)	$	2,821		$	3,115		$	3,058		$	2,797	$	3,203	(9.4	)%	1.9	%	0.9	%	(2.7)%
Asia Pacific	1,588			1,571			1,383			1,424		1,235		1.1	%	13.6	%	11.5	%	27.2%
Far East	377			433			458			375		423		(12.9	)%	(5.5	)%	0.5	%	2.4%
Latin America	1,685			1,686			1,434			1,423		1,348		(0.1	)%	17.6	%	18.4	%	25.1%
Net premiums earned	$	6,471		$	6,805		$	6,333		$	6,019	$	6,209	(4.9	)%	7.5	%	7.5	%	9.6%
	2015 % of Total			2014 % of Total			2013 % of Total
Line of Business
Commercial P&C (retail and wholesale)	48		%	47		%	49		%
Personal and small commercial lines	20		%	19		%	16		%
Personal accident (A&H)	32		%	34		%	35		%
Net premiums earned	100		%	100		%	100		%
Region
Europe / U.K.(2)	43		%	46		%	48		%
Asia Pacific	25		%	23		%	22		%
Far East	6		%	6		%	7		%
Latin America	26		%	25		%	23		%
Net premiums earned	100		%	100		%	100		%

⁽¹⁾ In constant dollars. Amounts are calculated by translating prior period results using the same local currency rates as the comparable current period.

⁽²⁾ Europe/U.K. includes Eurasia and Africa region.

The following table presents the impact of catastrophe losses and related reinstatement premiums and prior period reserve development on our loss and loss expense ratio:

	2015		2014		2013
Loss and loss expense ratio, as reported	47.2	%	46.9	%	48.4	%
Catastrophe losses and related reinstatement premiums	(2.2	)%	(1.6	)%	(1.4	)%
Prior period development	5.3	%	5.7	%	4.7	%
Loss and loss expense ratio, adjusted	50.3	%	51.0	%	51.7	%

Net pre-tax catastrophe losses, excluding reinstatement premiums, were $142 million in 2015, compared with $112 million in 2014 and $88 million in 2013. Catastrophe losses in 2015 were primarily related to a chemical storage facility explosion in Tianjin, China, a hailstorm in Australia, flooding and an earthquake in Chile, and severe storms in the U.K. and Asia. Catastrophe losses in 2014 were primarily related to flooding in Europe, severe storms in Japan, a hurricane in Mexico, and a hailstorm in Australia. Catastrophe losses in 2013 were primarily related to flooding in Australia, Europe, and Canada, as well

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as hurricanes in Latin America, and an earthquake in New Zealand. Net favorable prior period development was $343 million in 2015, compared with $391 million in 2014 and $299 million in 2013. Refer to the “Prior Period Development” section for additional information. The adjusted loss and loss expense ratio improved by 0.7 percentage points in 2015 due to lower non-catastrophe large losses. The adjusted loss and loss expense ratio decreased 0.7 percentage points in 2014 due primarily to both mix of business and underwriting actions which improved loss ratios on several portfolios.

The policy acquisition ratio increased 0.5 percentage points in 2015, primarily due to lower ceded commission benefits as a result of the non-renewal of an A&H external quota share treaty, (0.3 percentage points), as well as less favorable normal initial year purchase accounting adjustments than in 2014 (0.3 percentage points). As a result of purchase accounting requirements, the unearned premiums at the date of purchase related to the businesses acquired are recognized over the remaining coverage period with no expense for the associated historical acquisition costs that were incurred to underwrite those policies. The policy acquisition ratio increased 1.0 percentage point in 2014 due primarily to less favorable normal initial year purchase accounting adjustments than in 2013 (0.6 percentage points). In addition, the policy acquisition cost ratio increased due to a change in the overall mix of business towards A&H and personal lines products in regions that have higher acquisition cost ratios.

The administrative expense ratio increased 0.4 percentage points in 2015 primarily due to a higher proportion of expenses incurred in U.S. dollars compared to premiums earned in foreign currencies as well as integration expenses related to our Itaú Seguros acquisition. The administrative expense ratio decreased 0.9 percentage points in 2014 due primarily to growth in net premiums earned that outpaced the growth in administrative expenses. In addition, the administrative expense ratio decreased due to increased spending in 2013 to support growth.

Global Reinsurance

The Global Reinsurance segment represents our reinsurance operations comprising ACE Tempest Re Bermuda, ACE Tempest Re USA, ACE Tempest Re International, and ACE Tempest Re Canada. Global Reinsurance markets its reinsurance products worldwide under the ACE Tempest Re brand name and provides a broad range of coverage to a diverse array of primary P&C companies.

										% Change
(in millions of U.S. dollars, except for percentages)	2015			2014			2013			2015 vs. 2014		2014 vs. 2013
Net premiums written	$	828		$	935		$	991		(11.4	)%	(5.7	)%
Net premiums earned	849			1,026			976			(17.2	)%	5.1	%
Losses and loss expenses	290			431			396			(32.7	)%	8.8	%
Policy acquisition costs	214			257			197			(16.7	)%	30.5	%
Administrative expenses	49			54			50			(9.3	)%	8.0	%
Underwriting income	296			284			333			4.2	%	(14.7	)%
Net investment income	300			316			280			(5.1	)%	12.9	%
Net realized gains (losses)	(32		)	(29		)	53			10.3%		NM
Interest expense	5			4			5			25.0	%	(20.0	)%
Other (income) expense	(6		)	(54		)	(19		)	(88.9	)%	184.2	%
Income tax expense	26			38			36			(31.6	)%	5.6	%
Net income	$	539		$	583		$	644		(7.5	)%	(9.5	)%
Loss and loss expense ratio	34.2		%	42.0		%	40.5		%
Policy acquisition cost ratio	25.2		%	25.0		%	20.3		%
Administrative expense ratio	5.8		%	5.3		%	5.1		%
Combined ratio	65.2		%	72.3		%	65.9		%

Net premiums written decreased in 2015 as we maintained underwriting discipline in an environment of flat to declining rates and increasing competition. The decline was partially offset by new business written, primarily in our U.S. automobile business. Net premiums written decreased in 2014 primarily due to the non-renewal of a $79 million workers' compensation treaty, partially offset by new business written.

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Net premiums earned decreased in 2015 primarily due to the same factors driving the decrease in net premiums written as described above and from the adverse impact of the non-renewal of a workers' compensation treaty in the third quarter of 2014, which resulted in a$39 million decrease in premiums. Net premiums earned increased in 2014 primarily from the shorter earning period on certain of the new business written including two non-recurring short-term treaties.

The following tables present a line of business breakdown of Global Reinsurance net premiums earned:

										% Change
(in millions of U.S. dollars, except for percentages)	2015			2014			2013			2015 vs. 2014		2014 vs. 2013
Property and all other	$	204		$	298		$	253		(31.5	)%	17.8	%
Casualty	426			475			433			(10.1	)%	9.7	%
Property catastrophe	219			253			290			(13.4	)%	(12.8	)%
Net premiums earned	$	849		$	1,026		$	976		(17.2	)%	5.1	%
	2015 % of Total			2014 % of Total			2013 % of Total
Property and all other	24		%	29		%	26		%
Casualty	50		%	46		%	44		%
Property catastrophe	26		%	25		%	30		%
Net premiums earned	100		%	100		%	100		%

The following table presents the impact of catastrophe losses and related reinstatement premiums and prior period reserve development on our loss and loss expense ratio:

	2015		2014		2013
Loss and loss expense ratio, as reported	34.2	%	42.0	%	40.5	%
Catastrophe losses and related reinstatement premiums	(2.6	)%	(3.2	)%	(4.0	)%
Prior period development	14.3	%	6.7	%	9.1	%
Loss and loss expense ratio, adjusted	45.9	%	45.5	%	45.6	%

Net pre-tax catastrophe losses, excluding reinstatement premiums, were $22 million in 2015, compared with $34 million in 2014 and $41 million in 2013. Catastrophe losses in 2015 were primarily related to severe weather-related events in the U.S. Catastrophe losses in 2014 were related to severe storms in Japan, European hailstorms, and severe weather-related events in the U.S. Catastrophe losses in 2013 were primarily from flooding in Canada and Europe. Net favorable prior period development was $119 million in 2015, compared with $63 million in 2014 and $84 million in 2013 (2015, 2014 and 2013 are net of $4 million, $10 million, and $8 million, respectively, of unfavorable premium adjustments to loss sensitive treaties). Refer to the “Prior Period Development” section for additional information. The adjusted loss and loss expense ratio increased 0.4 percentage points in 2015 primarily due to a change in the mix of business in the current year towards higher loss ratio products in the U.S., offset by the non-renewal of a workers' compensation treaty in 2014, which had a higher loss ratio. The adjusted loss and loss expense ratio decreased slightly in 2014 compared to 2013.

The policy acquisition cost ratio increased 0.2 percentage points in 2015 due to the non-renewal of the workers' compensation treaty in 2014, noted above, which incurred no acquisition costs. The policy acquisition cost ratio increased in 2014 primarily due to a change in the mix of business towards products written in the U.S. that have a higher acquisition cost ratio than in other regions and the impact of the non-renewal of the workers' compensation treaty noted above, which incurred no acquisition costs.

The administrative expense ratio increased 0.5 percentage points in 2015 primarily from lower net premiums earned including the non-renewal of the workers' compensation treaty noted above, which did not generate any administrative expenses, partially offset by lower administrative expenses incurred in the current year. The administrative expense ratio increased 0.2 percentage points in 2014 as the prior year included the favorable impact of a $2 million expense adjustment that reduced the administrative expense ratio in 2013. Excluding this adjustment, the administrative expense ratio remained flat.

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Life

The Life segment includes our international life operations (ACE Life), ACE Tempest Life Re (ACE Life Re), and the North American supplemental A&H and life business of Combined Insurance (A&H). We assess the performance of our life business based on Life underwriting income, which includes Net investment income and (Gains) losses from fair value changes in separate account assets that do not qualify for separate account reporting under GAAP.

										% Change
(in millions of U.S. dollars, except for percentages)	2015			2014			2013			2015 vs. 2014		2014 vs. 2013
Net premiums written	$	1,998		$	2,012		$	1,972		(0.7	)%	2.0	%
Net premiums earned	1,947			1,962			1,905			(0.8	)%	3.0	%
Losses and loss expenses	601			589			582			2.0	%	1.2	%
Policy benefits	543			517			515			5.0	%	0.4	%
(Gains) losses from fair value changes in separate account assets(1)	19			(2		)	(16		)	NM		(87.5)%
Policy acquisition costs	476			478			358			(0.4	)%	33.5	%
Administrative expenses	291			285			343			2.1	%	(16.9	)%
Net investment income	265			268			251			(1.1	)%	6.8	%
Life underwriting income	282			363			374			(22.3	)%	(2.9	)%
Net realized gains (losses)	(229		)	(383		)	360			(40.2	)%	NM
Interest expense	5			11			15			(54.5	)%	(26.7)%
Other (income) expense(1)	(39		)	(1		)	10			NM		NM
Amortization of intangible assets	2			3			3			(33.3	)%	—	%
Income tax expense	30			46			34			(34.8	)%	35.3	%
Net income (loss)	$	55		$	(79	)	$	672		NM		NM

⁽¹⁾ (Gains) losses from fair value changes in separate account assets that do not qualify for separate account reporting under GAAP are reclassified for Life segment underwriting income presentation from Other (income) expense. For example, 2015 included losses on these assets of $19 million; the offsetting movement in the separate account liabilities is included in and reduces Policy benefits.

The following table presents a line of business breakdown of Life net premiums written and deposits collected on universal life and investment contracts:

											% Change
(in millions of U.S. dollars, except for percentages)	2015		2014		2013		C$(1) 2014		C$(1) 2013		2015 vs. 2014		2014 vs. 2013		C$(1)2015 vs. 2014		C$(1)2014 vs. 2013
A&H(1)	$	1,019	$	1,000	$	1,016	$	972	$	1,000	1.9	%	(1.6	)%	4.8	%	—
Life insurance	744		750		672		693		650		(0.7	)%	11.6	%	7.3	%	15.3	%
Life reinsurance	235		262		284		262		284		(10.2	)%	(7.6	)%	(10.2	)%	(7.6	)%
Net premiums written (excludes deposits below)	$	1,998	$	2,012	$	1,972	$	1,927	$	1,934	(0.7	)%	2.0	%	3.7	%	4.0	%
Deposits collected on universal life and investment contracts	$	1,015	$	997	$	821	$	953	$	811	1.8	%	21.4	%	6.5	%	22.9	%

⁽¹⁾ Includes the North American supplemental A&H and life business of Combined Insurance

Life net premiums written decreased slightly in 2015 reflecting the adverse impact of foreign exchange of $84 million. Life net premiums written increased 3.7 percent in 2015 in constant dollars, reflecting growth in our A&H and Life insurance businesses. A&H net premiums written increased due to growth in our core distribution channels, primarily Combined Insurance's supplemental A&H individual and group sales. Our Life insurance business grew primarily in Asia. Our life reinsurance business continues to decline as there is no new life reinsurance business currently being written. Life net premiums written increased 2.0 percent, or 4.0 percent in constant dollars in 2014. A&H net premiums written remained flat in 2014 after adjusting for the $16 million unfavorable impact of foreign exchange. Life insurance net premiums written increased in

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2014 primarily due to growth in our Asian markets. Our life reinsurance business continues to decline as there is no new life reinsurance business currently being written.

In 2014, we determined that certain A&H marketing-related costs were more appropriately classified as acquisition costs. This resulted in a $59 million increase to acquisition expenses and an offsetting decrease to administrative expenses in 2014.

Life underwriting income decreased in 2015 primarily due to unfavorable loss reserve development related to our A&H business in the current year, compared to favorable reserve development last year. The prior year was also favorable impacted by a one-time adjustment to certain life products in Asia. Foreign exchange adversely impacted underwriting income on an as reported basis. Life underwriting income decreased slightly in 2014 compared to 2013.

Deposits collected on universal life and investment contracts (life deposits) are not reflected as revenues in our consolidated statements of operations in accordance with GAAP. New life deposits are an important component of production, and although they do not significantly affect current period income from operations they are key to our efforts to grow our business. The increase in life deposits collected in both 2015 and 2014 is primarily due to growth in our Asian markets.

Other (income) expense consists primarily of our share of net (income) loss related to partially-owned insurance companies. Other income of $39 million for 2015 primarily resulted from gains on sales of investments by our partially-owned insurance company in China.

Net realized gains (losses), which are excluded from Life underwriting income, relate primarily to the change in the net fair value of reported guaranteed living benefits (GLB) reinsurance liabilities and changes in the fair value of derivatives used to partially offset the risk in the variable annuity guarantee portfolio. During 2015, realized losses of $203 million were associated with a net increase in the fair value of the GLB liabilities. These increases were primarily due to the falling equity market levels and the unfavorable impact of discounting future claims for one less year, partially offset by higher interest rates.

In the fourth quarter of 2015, we completed a review of policyholder behavior related to partial withdrawals and updated our review of policyholder lapse and annuitization behavior by treaty for our variable annuity reinsurance business.  Reinsured policies allow for policyholders to make periodic withdrawals from their account values without lapsing the policy. The partial withdrawal results in a reduction to the associated guaranteed value that is either equal or proportional to the amount of the reduction in account value. Based on our review of emerging behavior, we refined our assumptions around the types of partial withdrawals according to their impact on guaranteed value. This resulted in an increase to the fair value of GLB liabilities generating a realized loss of approximately $110 million. As lapse experience continued to emerge, we were able to expand our analysis and further refine our assumptions which resulted in a net increase to the fair value of GLB liabilities generating a realized loss of approximately $10 million. Because of a greater degree of reported experience related to behavior in years subsequent to the first year of annuitization eligibility, we also made several changes to our annuitization assumptions, which generally lowered the annuitization rate for most clients, while raising it for one client. The change in annuitization assumptions decreased the fair value of GLB liabilities and generated a realized gain of approximately $80 million. We will continue to monitor actual policyholder behavior (lapse, partial withdrawal, and annuitization) against our assumptions and make adjustments as appropriate in the period we receive and analyze this data. Also, during the fourth quarter of 2015, we refined certain assumptions around policyholder annuity type selection based on claim experience. This refinement decreased the fair value of GLB liabilities and generated a realized gain of approximately $45 million.

During 2014, realized losses of $213 million were associated with a net increase in the value of GLB liabilities; this increase was primarily due to lower interest rates and the unfavorable impact of discounting future claims for one less year, partially offset by a weakening yen and rising U.S. equity levels.

During 2013, realized gains of $929 million were associated with a net decrease in the value of GLB liabilities; this decrease was primarily due to rising equity levels, higher interest rates, and a weakening yen, partially offset by a net unfavorable impact of changes in lapse and annuitization assumptions and the unfavorable impact of discounting future claims for one less year.

We maintain positions in derivative instruments that increase in fair value when the S&P 500 index decreases. During the years ended December 31, 2015, 2014, and 2013, we experienced realized losses of $10 million, $168 million, and $579 million, respectively, related to these derivative instruments.

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Net Investment Income

	Years Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Fixed maturities	$	2,157		$	2,199		$	2,093
Short-term investments	49			45			29
Equity securities	16			33			37
Other	86			94			105
Gross investment income	2,308			2,371			2,264
Investment expenses	(114		)	(119		)	(120		)
Net investment income	$	2,194		$	2,252		$	2,144

Net investment income is influenced by a number of factors including the amounts and timing of inward and outward cash flows, the level of interest rates, and changes in overall asset allocation. Net investment income decreased 2.6 percent in 2015 compared with 2014 primarily due to the negative impact of foreign exchange of $49 million and lower call activity in our corporate bond portfolio, partially offset by a higher overall invested asset base. Net investment income increased 5.1 percent in 2014 compared with 2013 primarily due to a higher overall invested asset base and call activity in our corporate bond portfolio, partially offset by the negative impact of foreign exchange.

The yield on our fixed maturities was 4.0 percent for the years ended December 31, 2015, 2014, and 3.9 percent in 2013. This compares to the average market yield, which represents the weighted average yield to maturity of our fixed income portfolio based on market prices of the holdings at that date, of 2.8 percent in both December 31, 2015 and 2014 and 3.0 percent at December 31, 2013.

The 1.3 percent, 1.9 percent, and 1.3 percent yield on short-term investments for the years ended December 31, 2015, 2014, and 2013, respectively, reflects the global nature of our insurance operations. For example, yields on short-term investments in Brazil, Mexico, Indonesia, and Malaysia range from 3.3 percent to 14.3 percent in 2015. The yield in 2015 is lower compared to 2014 despite a higher average balance in short-term investments, due to investments held in the U.S. in anticipation of the Chubb acquisition, which earned a lower yield.

For the year ended December 31, 2015, the yield on our equity securities portfolio was 3.1 percent compared with 4.9 percent for 2014 and 4.6 percent for 2013, and reflects the yield on a global high dividend equity portfolio. The prior years also included dividends from an emerging debt portfolio, which was a mutual fund classified as equity. During the third quarter of 2014, however, we elected to exchange our interest in the strategic emerging debt portfolio for direct ownership of certain of the underlying fixed maturities, and the remainder in cash. In 2013 and 2014, the strategic emerging debt portfolio, prior to the election to exchange our interest, and the preferred equity securities represented 76 percent and 64 percent, respectively, of the gross equity securities investment income.

The following table shows the return on average invested assets:

	Year Ended December 31
(in millions of U.S. dollars, except for percentages)	2015			2014			2013
Average invested assets	$	63,252		$	60,382		$	58,574
Net investment income	$	2,194		$	2,252		$	2,144
Return on average invested assets	3.5		%	3.7		%	3.7		%

Return on average invested assets is lower in 2015 compared to 2014 and 2013 primarily due to increased holdings in U.S. short-term investments in anticipation of the Chubb acquisition, which earned a low yield.

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Net Realized and Unrealized Gains (Losses)

We take a long-term view with our investment strategy, and our investment managers manage our investment portfolio to maximize total return within certain specific guidelines designed to minimize risk. The majority of our investment portfolio is available for sale and reported at fair value. Our held to maturity investment portfolio is reported at amortized cost.

The effect of market movements on our available for sale investment portfolio impacts Net income (through Net realized gains (losses)) when securities are sold or when we record an Other-than-temporary impairment (OTTI) charge in Net income. For a discussion related to how we assess OTTI for all of our investments, including credit-related OTTI, and the related impact on Net income, refer to Note 3 e) to the Consolidated Financial Statements. Additionally, Net income is impacted through the reporting of changes in the fair value of derivatives, including financial futures, options, swaps, and GLB reinsurance. Changes in unrealized appreciation and depreciation on available for sale securities, which result from the revaluation of securities held, are reported as a separate component of Accumulated other comprehensive income in Shareholders’ equity in the consolidated balance sheets.

The following table presents our net realized and unrealized gains (losses) on investments:

	Year Ended December 31, 2015									Year Ended December 31, 2014
(in millions of U.S. dollars)	Net Realized Gains (Losses) (1)			Net Unrealized Gains (Losses)			Net Impact			Net Realized Gains (Losses) (1)			Net Unrealized Gains (Losses)			Net Impact
Fixed maturities	$	(180	)	$	(1,076	)	$	(1,256	)	$	23		$	732		$	755
Fixed income derivatives	32			—			32			(107		)	—			(107		)
Public equity	29			(17		)	12			(47		)	77			30
Private equity	13			(46		)	(33		)	(3		)	42			39
Total investment portfolio	(106		)	(1,139		)	(1,245		)	(134		)	851			717
Variable annuity reinsurance derivative transactions, net of applicable hedges	(213		)	—			(213		)	(385		)	—			(385		)
Other derivatives	(12		)	—			(12		)	50			—			50
Foreign exchange	(80		)	(958		)	(1,038		)	(40		)	(632		)	(672		)
Other	(9		)	25			16			2			(5		)	(3		)
Net gains (losses) before tax	(420		)	(2,072		)	(2,492		)	(507		)	214			(293		)
Income tax (benefit) expense	(10		)	(146		)	(156		)	100			175			275
Net gains (losses)	$	(410	)	$	(1,926	)	$	(2,336	)	$	(607	)	$	39		$	(568	)

⁽¹⁾ For the year ended December 31, 2015, other-than-temporary impairments include $103 million for fixed maturities, $7 million for public equity, and $2 million for private equity. For the year ended December 31, 2014, other-than-temporary impairments include $57 million for fixed maturities, $3 million for private equity, and $8 million for public equity.

At December 31, 2015, our investment portfolios held by U.S. legal entities included approximately $97 million of gross unrealized losses on fixed income investments. Our tax planning strategy related to these losses is based on our view that we will hold these fixed income investments until they recover their cost. As such, we have recognized a deferred tax asset of approximately $34 million related to these fixed income investments. This strategy allows us to recognize the associated deferred tax asset related to these fixed income investments as we do not believe these losses will ever be realized.

Other Income and Expense Items

Effective 2015, amortization of intangible assets are excluded from Other (income) expense and disclosed separately in the consolidated statements of operations. Prior year amounts have been reclassified to conform to the current year presentation.

Other (income) expense was $(51) million in 2015 compared with $(190) million and $(80) million in 2014 and 2013, respectively. Refer to Note 14 to the Consolidated Financial Statements for the components of Other (income) expense.

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Amortization of Intangible Assets

Amortization of intangible assets was $171 million in 2015 compared with $108 million and $95 million in 2014 and 2013, respectively.  Refer to Note 6 to the Consolidated Financial Statements for the Amortization of intangible assets as well as the expected amortization expense for the next five years.

The pre-tax amortization expense related to purchased intangibles resulting from the Chubb acquisition, which will be included in Amortization of intangible assets is currently expected to reduce amortization expense in 2016. This impact reflects the fact that the unfavorable amortization expense from these purchased intangible assets will be more than offset by the favorable impact of amortization of the loss reserve fair value adjustment. The intangibles that are subject to amortization, consist principally of distributor relationships and technology.

For 2016, the amortization of acquired UPR intangible of the Chubb acquisition (currently estimated at $1.5 billion) is expected to be recognized through Policy acquisition costs (within segment underwriting income) in line with the earnings pattern of the acquired UPR, with approximately 40 percent in the first quarter, 30 percent in the second quarter, 20 percent in the third quarter, and 10 percent in the fourth quarter.  This amortization will reduce the positive impact of the elimination of the historical deferred acquisition costs (approximately $1.3 billion) given that these costs are eliminated in purchase accounting.

In addition, net income in 2016 will also include the net impact of the amortization associated with the fair value adjustments of acquired invested assets and long-term debt related to purchase accounting.  These items will amortize through net investment income and interest expense, respectively, on the consolidated statement of operations.

We will provide updated information regarding the expected impact of the amortization of the intangibles related to the Chubb acquisition in a future filing with the SEC.

Investments

Our investment portfolio is invested primarily in publicly traded, investment grade, fixed income securities with an average credit quality of A/Aa as rated by the independent investment rating services Standard and Poor’s (S&P)/ Moody’s Investors Service (Moody’s). The portfolio is externally managed by independent, professional investment managers and is broadly diversified across geographies, sectors, and issuers. Other investments principally comprise direct investments, investment funds, and limited partnerships. We hold no collateralized debt obligations or collateralized loan obligations in our investment portfolio, and we provide no credit default protection. We have long-standing global credit limits for our entire portfolio across the organization. Exposures are aggregated, monitored, and actively managed by our Global Credit Committee, comprising senior executives, including our Chief Financial Officer, our Chief Risk Officer, our Chief Investment Officer, and our Treasurer. We also have well-established, strict contractual investment rules requiring managers to maintain highly diversified exposures to individual issuers and closely monitor investment manager compliance with portfolio guidelines.

The average duration of our fixed income securities, including the effect of options and swaps, was 3.5 and 4.0 years at December 31, 2015 and 2014, respectively. The decrease in duration in 2015 was primarily due to investment portfolio asset allocation changes toward higher short-term holdings in anticipation of the Chubb acquisition in early 2016. We estimate that a 100 basis point (bps) increase in interest rates would reduce the valuation of our fixed income portfolio by approximately $2.2 billion at December 31, 2015.

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The following table shows the fair value and cost/amortized cost of our invested assets: 

	December 31, 2015				December 31, 2014
(in millions of U.S. dollars)	Fair Value		Cost/ Amortized Cost		Fair Value		Cost/ Amortized Cost
Fixed maturities available for sale	$	43,587	$	43,149	$	49,395	$	47,826
Fixed maturities held to maturity	8,552		8,430		7,589		7,331
Short-term investments	10,446		10,446		2,322		2,322
	62,585		62,025		59,306		57,479
Equity securities	497		441		510		440
Other investments	3,291		2,993		3,346		2,999
Total investments	$	66,373	$	65,459	$	63,162	$	60,918

The fair value of our total investments increased $3.2 billion during the year ended December 31, 2015, primarily due to the proceeds from debt issuances (net of repayments) and the investing of operating cash flows, partially offset by unrealized depreciation, the unfavorable impact of foreign exchange, dividends paid on our Common Shares, and share repurchases.

The following tables present the market value of our fixed maturities and short-term investments at December 31, 2015 and 2014. The first table lists investments according to type and the second according to S&P credit rating:

	December 31, 2015				December 31, 2014
(in millions of U.S. dollars, except for percentages)	Market Value		% of Total		Market Value		% of Total
Treasury	$	2,395	4	%	$	2,448	4	%
Agency	878		1	%	1,222		2	%
Corporate and asset-backed securities	17,985		28	%	19,854		34	%
Mortgage-backed securities	11,701		19	%	12,325		21	%
Municipal	4,950		8	%	4,930		8	%
Non-U.S.	14,230		23	%	16,205		27	%
Short-term investments	10,446		17	%	2,322		4	%
Total	$	62,585	100	%	$	59,306	100	%
AAA	$	14,369	23	%	$	8,943	15	%
AA	22,141		36	%	21,589		36	%
A	10,163		16	%	11,625		20	%
BBB	8,941		14	%	8,690		15	%
BB	3,775		6	%	4,372		7	%
B	3,018		5	%	3,916		7	%
Other	178		—	%	171		—	%
Total	$	62,585	100	%	$	59,306	100	%

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Corporate and asset-backed securities

The following table presents our 10 largest global exposures to corporate bonds by market value at December 31, 2015:

(in millions of U.S. dollars)	Market Value
JP Morgan Chase & Co	$	441
General Electric Co	392
Goldman Sachs Group Inc	318
AT&T INC	269
Wells Fargo & Co	257
Bank of America Corp	237
Verizon Communications Inc	232
Morgan Stanley	216
Citigroup Inc	200
Ford Motor Co	197

Mortgage-backed securities

	S&P Credit Rating										Market Value		Amortized Cost
December 31, 2015 (in millions of U.S. dollars)	AAA		AA		A		BBB		BB and below		Total		Total
Agency residential mortgage-backed (RMBS)	$	—	$	9,502	$	—	$	—	$	—	$	9,502	$	9,325
Non-agency RMBS	15		5		12		6		12		50		48
Commercial mortgage-backed	2,126		10		13		—		—		2,149		2,161
Total mortgage-backed securities	$	2,141	$	9,517	$	25	$	6	$	12	$	11,701	$	11,534

Municipal

As part of our overall investment strategy, we may invest in states, municipalities, and other political subdivisions fixed maturity securities (Municipal). We apply the same investment selection process described previously to our Municipal investments. The portfolio is highly diversified primarily in state general obligation bonds and essential service revenue bonds including education and utilities (water, power, and sewers).

Non-U.S.

Our exposure to the Euro results primarily from Chubb European Group which is headquartered in London and offers a broad range of coverages throughout the European Union, Central, and Eastern Europe. Chubb primarily invests in Euro denominated investments to support its local currency insurance obligations and required capital levels. Chubb’s local currency investment portfolios have strict contractual investment guidelines requiring managers to maintain a high quality and diversified portfolio to both sector and individual issuers. Investment portfolios are monitored daily to ensure investment manager compliance with portfolio guidelines.

Our non-U.S. investment grade fixed income portfolios are currency-matched with the insurance liabilities of our non-U.S. operations. The average credit quality of our non-U.S. fixed income securities is A and 53 percent of our holdings are rated AAA or guaranteed by governments or quasi-government agencies. Within the context of these investment portfolios, our government and corporate bond holdings are highly diversified across industries and geographies. Issuer limits are based on credit rating (AA—two percent, A—one percent, BBB—0.5 percent of the total portfolio) and are monitored daily via an internal compliance system. Because of this investment approach, we do not have a direct exposure to troubled sovereign borrowers in Europe. We manage our indirect exposure using the same credit rating based investment approach. Accordingly, we do not believe our indirect exposure is material.

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The following table summarizes the market value and amortized cost of our non-U.S. fixed income portfolio by country/sovereign for non-U.S. government securities at December 31, 2015: 

(in millions of U.S. dollars)	Market Value		Amortized Cost
United Kingdom	$	959	$	948
Republic of Korea	900		788
Federative Republic of Brazil	568		575
United Mexican States	498		499
Canada	396		383
Kingdom of Thailand	375		350
Province of Ontario	300		287
Province of Quebec	210		201
Japan	192		192
Socialist Republic of Vietnam	168		158
Other Non-U.S. Government Securities (1)	2,391		2,328
Total	$	6,957	$	6,709

⁽¹⁾  There are no investments in Portugal, Ireland, Italy, Greece or Spain.

The following table summarizes the market value and amortized cost of our non-U.S. fixed income portfolio by country/sovereign for non-U.S. corporate securities at December 31, 2015:

(in millions of U.S. dollars)	Market Value		Amortized Cost
United Kingdom	$	1,442	$	1,414
Canada	783		790
United States (1)	568		570
France	507		498
Netherlands	499		490
Australia	483		476
Germany	347		336
Switzerland	248		246
China	231		226
Hong Kong	164		162
Other Non-U.S. Corporate Securities	2,001		2,035
Total	$	7,273	$	7,243

⁽¹⁾ The countries that are listed in the non-U.S. corporate fixed income portfolio above represent the ultimate parent company's country of risk. Non-U.S. corporate securities could be issued by foreign subsidiaries of U.S. corporations.

Below-investment grade corporate fixed income portfolio

Below-investment grade securities have different characteristics than investment grade corporate debt securities. Risk of loss from default by the borrower is greater with below-investment grade securities. Below-investment grade securities are generally unsecured and are often subordinated to other creditors of the issuer. Also, issuers of below-investment grade securities usually have higher levels of debt and are more sensitive to adverse economic conditions, such as recession or increasing interest rates, than investment grade issuers. At December 31, 2015, our corporate fixed income investment portfolio included below-investment grade and non-rated securities which, in total, comprised approximately 10 percent of our fixed income portfolio. Our below-investment grade and non-rated portfolio includes over 1,000 issuers, with the greatest single exposure being $113 million.

We manage high-yield bonds as a distinct and separate asset class from investment grade bonds. The allocation to high-yield bonds is explicitly set by internal management and is targeted to securities in the upper tier of credit quality (BB/B). Our minimum rating for initial purchase is BB/B. Six external investment managers are responsible for high-yield security selection

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and portfolio construction. Our high-yield managers have a conservative approach to credit selection and very low historical default experience. Holdings are highly diversified across industries and generally subject to a 1.5 percent issuer limit as a percentage of high-yield allocation. We monitor position limits daily through an internal compliance system. Derivative and structured securities (e.g., credit default swaps and collateralized loan obligations) are not permitted in the high-yield portfolio.

Reinsurance Recoverable on Ceded Reinsurance

(in millions of U.S. dollars)	December 31 2015		December 31 2014
Reinsurance recoverable on unpaid losses and loss expenses (1)	$	10,741	$	11,307
Reinsurance recoverable on paid losses and loss expenses (1)	645		685
Net reinsurance recoverable on losses and loss expenses	$	11,386	$	11,992
Reinsurance recoverable on policy benefits	$	187	$	217

⁽¹⁾  Net of a provision for uncollectible reinsurance.

We evaluate the financial condition of our reinsurers and potential reinsurers on a regular basis and also monitor concentrations of credit risk with reinsurers. The provision for uncollectible reinsurance is required principally due to the potential failure of reinsurers to indemnify us, primarily because of disputes under reinsurance contracts and insolvencies. The provision for uncollectible reinsurance is based on a default analysis applied to gross reinsurance recoverables, net of approximately $2.6 billion and $2.4 billion of collateral at December 31, 2015 and 2014, respectively. The decrease in net reinsurance recoverable on loss and loss expenses was primarily due to the impact of unfavorable foreign exchange, favorable PPD, and collections relating to run-off operations, partially offset by higher non-catastrophe large losses.

Asbestos and Environmental (A&E)

Asbestos and environmental (A&E) reserving considerations

For asbestos, Chubb faces claims relating to policies issued to manufacturers, distributors, installers, and other parties in the chain of commerce for asbestos and products containing asbestos. Claimants will generally allege damages across an extended time period which may coincide with multiple policies covering a wide range of time periods for a single insured.

Environmental claims present exposure for remediation and defense costs associated with the contamination of property as a result of pollution. It is common, especially for larger defendants, to be named as a potentially responsible party at multiple sites.

The following table presents count information for asbestos claims by causative agent and environmental claims by site, for direct policies only:

	Asbestos (by causative agent)		Environmental (by site)
	2015	2014	2015	2014
Open at beginning of year	1,127	1,107	3,118	3,339
Newly reported	64	64	463	201
Closed or otherwise disposed	46	44	471	422
Open at end of year	1,145	1,127	3,110	3,118

The increase in newly reported environmental sites in 2015 were primarily for administrative purposes to process settlement payments.

Survival ratios are calculated by dividing the asbestos or environmental loss and allocated loss adjustment expense (ALAE) reserves by the average asbestos or environmental loss and ALAE payments for the three most recent calendar years (3 year survival ratio). The 3 year survival ratios for gross and net Asbestos loss and ALAE reserves were 4.2 years and 5.4 years, respectively. The 3 year survival ratios for gross and net Environmental loss and ALAE reserves were both 1.7 years. The survival ratios provide only a very rough depiction of reserves and are significantly impacted by a number of factors such as

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aggressive settlement practices, variations in gross to ceded relationships within the asbestos or environmental claims, and levels of coverage provided. We, therefore, urge caution in using these very simplistic ratios to gauge reserve adequacy.

Catastrophe Management

We actively monitor our catastrophe risk accumulation around the world. The table below presents our modeled annual aggregate pre-tax probable maximum loss (PML), net of reinsurance, for 100-year and 250-year return periods for U.S. hurricane and California earthquake at December 31, 2015 and 2014. The table also presents Chubb’s corresponding share of pre-tax industry losses for each of the return periods for U.S. hurricane and California earthquake. For example, according to the model, for the 1-in-100 return period scenario, there is a one percent chance that our losses incurred in any year from U.S. hurricane events could be in excess of $1,700 million (or 5.8 percent of our total shareholders’ equity at December 31, 2015). We estimate that at such hypothetical loss levels, Chubb’s share of aggregate industry losses would be approximately 1.1 percent.

	Modeled Annual Aggregate Net PML
	U.S. Hurricane								California Earthquake
	December 31						December 31		December 31						December 31
	2015						2014		2015						2014
(in millions of U.S. dollars, except for percentages)	Chubb		% of Total Shareholders’ Equity		% of Industry		Chubb		Chubb		% of Total Shareholders’ Equity		% of Industry		Chubb
1-in-100	$	1,700	5.8	%	1.1	%	$	1,757	$	718	2.5	%	1.9	%	$	797
1-in-250	$	2,346	8.1	%	1.1	%	$	2,383	$	988	3.4	%	1.7	%	$	1,046

The above modeled loss information at December 31, 2015 reflects our in-force portfolio at October 1, 2015 and reinsurance program at January 1, 2016.

The modeling estimates of both Chubb and industry loss levels are inherently uncertain owing to key assumptions. First, while the use of third-party catastrophe modeling packages to simulate potential hurricane and earthquake losses is prevalent within the insurance industry, the models are reliant upon significant meteorology, seismology, and engineering assumptions to estimate hurricane and earthquake losses. In particular, modeled hurricane and earthquake events are not always a representation of actual events and ensuing additional loss potential. Second, there is no universal standard in the preparation of insured data for use in the models and the running of the modeling software. Third, we are reliant upon third-party estimates of industry insured exposures and there is significant variation possible around the relationship between our loss and that of the industry following an event. Fourth, we assume that our reinsurance recoveries following an event are fully collectible. These loss estimates do not represent our potential maximum exposures and it is highly likely that our actual incurred losses would vary materially from the modeled estimates.

Natural Catastrophe Property Reinsurance Program

Chubb’s core property catastrophe reinsurance program provides protection against natural catastrophes impacting its primary property operations (i.e., excluding our Global Reinsurance and Life segments).

We regularly review our reinsurance protection and corresponding property catastrophe exposures. This may or may not lead to the purchase of additional reinsurance prior to a program’s renewal date. In addition, prior to each renewal date, we consider how much, if any, coverage we intend to buy and we may make material changes to the current structure in light of various factors, including modeled PML assessment at various return periods, reinsurance pricing, our risk tolerance and exposures, and various other structuring considerations.

Chubb purchases a Global Property Catastrophe Reinsurance Program for our North American and International operations. The program is effective July 1, 2015 through June 30, 2016, and consists of three layers in excess of losses retained by Chubb. In addition, we also purchased terrorism coverage (excluding nuclear, biological, chemical and radiation coverage) for the United States from July 1, 2015 to June 30, 2016 with the same limits and retention and percentage placed except that the majority

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of terrorism coverage is on an aggregate basis above our retentions without a reinstatement. A majority of the program, excess of a $1 billion attachment point, also includes biological and chemical terrorism coverage for the personal lines exposures in those states that mandate such coverage.

Loss Location	Layer of Loss	Comments	Notes
United States (excluding Alaska and Hawaii)	$0 million – $500 million	Losses retained by Chubb	(a)
United States (excluding Alaska and Hawaii)	$500 million – $1.0 billion	All natural perils, and terrorism (excluding nuclear, biological, chemical and radiation)	(b)
United States (excluding Alaska and Hawaii)	$1.0 billion – $1.275 billion	All natural perils, and terrorism (excluding nuclear, biological, chemical and radiation - with biological and chemical covered for the personal lines exposures)	(c)
United States (excluding Alaska and Hawaii)	$1.275 billion – $1.475 billion	All natural perils, and terrorism (excluding nuclear, biological, chemical and radiation)	(d)
International (including Alaska and Hawaii)	$0 million – $125 million	Losses retained by Chubb	(a)
International (including Alaska and Hawaii)	$125 million – $625 million	All natural perils, and terrorism (excluding nuclear, biological, chemical and radiation)	(b)
Alaska, Hawaii, and Canada	$625 million – $900 million	All natural perils, and terrorism (excluding nuclear, biological, chemical and radiation)	(c)
Alaska, Hawaii, and Canada	$925 million – $1.1 billion	All natural perils, and terrorism (excluding nuclear, biological, chemical and radiation)	(d)
(a) Ultimate retention will depend upon the nature of the loss and the interplay between the underlying per risk programs and certain other catastrophe programs purchased by individual business units. These other catastrophe programs have the potential to reduce our effective retention below the stated levels.
(b) These coverages are both part of the same Core layer within the Global Catastrophe Program and are approximately 97% placed with Reinsurers. As such, it may be exhausted in one region and not available in the other.
(c) These coverages are both part of the same Second layer within the Global Catastrophe Program and are approximately 100% placed with Reinsurers. As such, it may be exhausted in one region and not available in the other.
(d) These coverages are both part of the same Third layer within the Global Catastrophe Program and are 100% placed with Reinsurers. As such, it may be exhausted in one region and not available in the other.

Political Risk, Trade Credit, and Structured Trade Credit

Political risk insurance is a specialized coverage that provides clients with protection against unexpected, catastrophic political or macroeconomic events, primarily in developing markets. We participate in this market through our wholly-owned subsidiary Sovereign Risk Insurance Ltd. (Sovereign), and through a unit of our London-based AGM operation. Sovereign is one of the world's leading underwriters of political risk insurance and has a global portfolio spread across more than 100 countries. Its clients include financial institutions, national export credit agencies, leading multilateral agencies, and multinational corporations. AGM writes political risk, trade credit, and structured trade credit business out of underwriting offices in London, England; Hamburg, Germany; Sao Paulo, Brazil; Singapore; Tokyo, Japan; and in the U.S. in the following locations: New York, New York; Los Angeles, California; and Washington, D.C.

Our political risk insurance provides protection to commercial lenders against defaults on cross border loans, insulates investors against equity losses, and protects exporters against defaults on contracts. Commercial lenders, our largest client segment, are covered for missed scheduled loan repayments due to acts of confiscation, expropriation or nationalization by the host government, currency inconvertibility or exchange transfer restrictions, or war or other acts of political violence. In addition, in the case of loans to government-owned entities or loans that have a government guarantee, political risk policies cover scheduled payments against risks of non-payment or non-honoring of government guarantees. Equity investors and corporations receive similar coverage to that of lenders, except they are protected against financial losses, inability to repatriate dividends, and physical damage to their operations caused by covered events. Our export contracts protection provides coverage for both

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exporters and their financing banks against the risk of contract frustration due to government actions, including non-payment by government entities.

AGM's trade credit and structured trade credit businesses cover losses due to insolvency, protracted default, and political risk perils including export and license cancellation. Our core trade credit product provides coverage to larger companies that have sophisticated credit risk management systems, with exposure to multiple customers and that have the ability to self-insure losses up to a certain level through excess of loss coverage. Its structured trade credit business provides coverage to trade finance banks, exporters, and trading companies, with exposure to trade-related financing instruments.

We have implemented structural features in our policies in order to control potential losses within the political risk, trade credit, and structured credit businesses. These include basic loss sharing features that include co-insurance and deductibles, and in the case of trade credit, the use of non-qualifying losses that drop smaller exposures deemed too difficult to assess. Ultimate loss severity is also limited by using waiting periods to enable the insurer and insured to agree on recovery strategies, and the subrogation of the rights of the lender/exporter to the insurer following a claim. We have the option to pay claims over the original loan payment schedule, rather than in a lump sum in order to provide insureds and the insurer additional time to remedy problems and work towards full recoveries. It is important to note that political risk, trade credit, and structured trade credit policies are named peril conditional contracts, not financial guarantees, and claims are only paid after conditions and warranties are fulfilled. Political risk, trade credit, and structured trade credit insurance do not cover currency devaluations, bond defaults, any form of derivatives, movements in overseas equity markets, transactions deemed illegal, or situations where corruption or misrepresentation has occurred, or debt that is not legally enforceable. In addition to assessing and mitigating potential exposure on a policy-by-policy basis, we also have specific risk management measures in place to manage overall exposure and risk. These measures include placing country and individual transaction limits based on country risk and credit ratings, combined single loss limits on multi-country policies, the use of reinsurance protection, and regular modeling and stress-testing of the portfolio.

Crop Insurance

We are, and have been since the 1980s, one of the leading writers of crop insurance in the U.S. and have conducted that business through a managing general agent subsidiary of Rain and Hail. We provide protection throughout the U.S. on a variety of crops and are therefore geographically diversified, which reduces the risk of exposure to a single event or a heavy accumulation of losses in any one region. Our crop insurance business comprises two components – Multiple Peril Crop Insurance (MPCI) and crop-hail insurance.

The MPCI program is offered in conjunction with the U.S. Department of Agriculture (USDA). The policies cover revenue shortfalls or production losses due to natural causes such as drought, excessive moisture, hail, wind, frost, insects, and disease. Generally, policies have deductibles ranging from 10 percent to 50 percent of the insured's risk. The USDA's Risk Management Agency (RMA) sets the policy terms and conditions, rates and forms, and is also responsible for setting compliance standards. As a participating company, we report all details of policies underwritten to the RMA and are party to a Standard Reinsurance Agreement (SRA). The SRA sets out the relationship between private insurance companies and the Federal Crop Insurance Corporation (FCIC) concerning the terms and conditions regarding the risks each will bear including the pro-rata and state stop-loss provisions which allows companies to limit the exposure of any one state or group of states on their underwriting results. In addition to the pro-rata and excess of loss reinsurance protections inherent in the SRA, we also purchase third-party proportional and stop-loss reinsurance for our MPCI business to reduce our exposure. We may also enter into crop derivative contracts to further manage our risk exposure.

Each year the RMA issues a final SRA for the subsequent reinsurance year. In June 2015, the RMA released the 2016 SRA which establishes the terms and conditions for the 2016 reinsurance year (i.e., July 1, 2015 through June 30, 2016) that replaced the 2015 SRA. There were no significant changes in the terms and conditions, and therefore the new SRA does not materially impact Chubb's outlook on the crop program relative to 2016.

On the MPCI business, we recognize net premiums written as soon as estimable, which is generally when we receive acreage reports from the policyholders on the various crops throughout the U.S. This allows us to best determine the premium associated with the liability that is being planted. The MPCI program has specific timeframes as to when producers must report acreage to us and in certain cases, the reporting occurs after the close of the respective reinsurance year. Once the net premium written has been recorded, the premium is then earned over the growing season for the crops. A majority of the crops that are

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covered in the program are typically subject to the SRA in effect at the beginning of the year. Given the major crops covered in the program, we typically see a substantial written and earned premium impact in the second and third quarters.

The pricing of MPCI premium is determined using a number of factors including commodity prices and related volatility. For instance, in most states the pricing for the MPCI Revenue Product for corn includes a factor that is based on the average price in February of the Chicago Board of Trade December corn futures. To the extent that the corn commodity prices are higher in February than they were in the previous February, and all other factors are the same, the increase in corn prices will increase the corn premium year over year.

Our crop-hail program is a private offering. Premium is earned on the crop-hail program over the coverage period of the policy. Given the very short nature of the growing season, most crop-hail business is typically written in the second and third quarters with the earned premium also more heavily occurring during this time frame. We use industry data to develop our own rates and forms for the coverage offered. The policy primarily protects farmers against yield reduction caused by hail and/or fire, and related costs such as transit to storage. We offer various deductibles to allow the grower to partially self-insure for a reduced premium cost. We limit our crop-hail exposures through the use of township liability limits and third-party proportional and stop-loss reinsurance on our net retained hail business.

Liquidity

Liquidity is a measure of a company's ability to generate cash flows sufficient to meet short-term and long-term cash requirements. As a holding company, Chubb Limited possesses assets that consist primarily of the stock of its subsidiaries and other investments. In addition to net investment income, Chubb Limited's cash flows depend primarily on dividends or other statutorily permissible payments. Historically, these dividends and other payments have come from Chubb's Bermuda-based operating subsidiaries, which we refer to as our Bermuda subsidiaries. Our consolidated sources of funds consist primarily of net premiums written, fees, net investment income, and proceeds from sales and maturities of investments. Funds are used at our various companies primarily to pay claims, operating expenses, and dividends, to service debt, to purchase investments, and to fund acquisitions.

We anticipate that positive cash flows from operations (underwriting activities and investment income) should be sufficient to cover cash outflows under most loss scenarios for the near term. Should the need arise, we generally have access to capital markets and available credit facilities. In December 2015, we increased our existing $1.0 billion unsecured operational letters of credit (LOC) facility from $1.0 billion to $1.5 billion with the consent of the issuers.Refer to “Credit Facilities” below for additional information. Our access to funds under an existing credit facility is dependent on the ability of the bank that is a party to the facility to meet its funding commitments. Our existing credit facility has a remaining term expiring in November 2017 and requires that we maintain certain financial covenants, all of which we met at December 31, 2015. Should our existing credit provider experience financial difficulty, we may be required to replace credit sources, possibly in a difficult market. If we cannot obtain adequate capital or sources of credit on favorable terms, on a timely basis, or at all, our business, operating results, and financial condition could be adversely affected. To date, we have not experienced difficulty accessing our credit facility.

To further ensure the sufficiency of funds to settle unforeseen claims, we hold certain invested assets in cash and short-term investments. In addition, for certain insurance, reinsurance, or deposit contracts that tend to have relatively large and reasonably predictable cash outflows, we attempt to establish dedicated portfolios of assets that are duration-matched with the related liabilities. With respect to the duration of our overall investment portfolio, we manage asset durations to both maximize return given current market conditions and provide sufficient liquidity to cover future loss payments. All things being equal, in a low interest rate environment, the overall duration of our fixed maturities tends to be shorter and in a high interest rate environment, such duration tends to be longer. At December 31, 2015, the average duration of our fixed maturities (3.5 years) is less than the average expected duration of our insurance liabilities (4.8 years).

Despite our safeguards, if paid losses accelerate beyond our ability to fund such paid losses from current operating cash flows, we might need to either liquidate a portion of our investment portfolio or arrange for financing. Potential events causing such a liquidity strain could include several significant catastrophes occurring in a relatively short period of time, large uncollectible reinsurance recoverables on paid losses (as a result of coverage disputes, reinsurers' credit problems, or decreases in the value of collateral supporting reinsurance recoverables) or increases in collateral postings under our variable annuity reinsurance business. Because each subsidiary focuses on a more limited number of specific product lines than is collectively available from the Chubb Group of Companies, the mix of business tends to be less diverse at the subsidiary level. As a result, the probability of a liquidity strain, as described above, may be greater for individual subsidiaries than when liquidity is assessed on a

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consolidated basis. If such a liquidity strain were to occur in a subsidiary, we could be required to liquidate a portion of our investments, potentially at distressed prices, as well as be required to contribute capital to the particular subsidiary and/or curtail dividends from the subsidiary to support holding company operations.

The payment of dividends or other statutorily permissible distributions from our operating companies are subject to the laws and regulations applicable to each jurisdiction, as well as the need to maintain capital levels adequate to support the insurance and reinsurance operations, including financial strength ratings issued by independent rating agencies. During 2015, we were able to meet all of our obligations, including the payments of dividends on our Common Shares, with our net cash flows.

We assess which subsidiaries to draw dividends from based on a number of factors. Considerations such as regulatory and legal restrictions as well as the subsidiary's financial condition are paramount to the dividend decision. Chubb Limited received dividends of $5.0 billion and $300 million from its Bermuda subsidiaries in 2015 and 2014, respectively. $2.7 billion of the 2015 dividends were paid in 2015, while the remainder were paid in 2016. The dividends received in 2015 included $5.0 billion used to finance a portion of the Chubb acquisition in 2016. Chubb Limited received dividends of $261 million and nil from its Switzerland subsidiaries in 2015 and 2014, respectively.

The payment of any dividends from AGM or its subsidiaries is subject to applicable U.K. insurance laws and regulations.  In addition, the release of funds by Syndicate 2488 to subsidiaries of AGM is subject to regulations promulgated by the Society of Lloyd's. Chubb Limited received no dividends from AGM in 2015 and 2014.

The U.S. insurance subsidiaries of ACE INA Holdings Inc. (ACE INA) may pay dividends, without prior regulatory approval, subject to restrictions set out in state law of the subsidiary's domicile (or, if applicable, commercial domicile). ACE INA's international subsidiaries are also subject to insurance laws and regulations particular to the countries in which the subsidiaries operate. These laws and regulations sometimes include restrictions that limit the amount of dividends payable without prior approval of regulatory insurance authorities. Chubb Limited received no dividends from ACE INA in 2015 and 2014. Debt issued by ACE INA is serviced by statutorily permissible distributions by ACE INA's insurance subsidiaries to ACE INA as well as other group resources. ACE INA received $833 million of dividends from its subsidiaries in 2015 and $401 million of dividends from its subsidiaries in 2014, of which $374 million was paid in cash. At December 31, 2015, the amount of dividends available to be paid to ACE INA in 2016 from its subsidiaries without prior approval of insurance regulatory authorities totals $1.0 billion.

ACE INA also received $5.1 billion in capital contributions in 2015, of which $2.8 billion were paid in 2015, while the remainder were paid in 2016. $5.0 billion of these capital contributions were sourced from the dividends from the Bermuda subsidiaries to fund the Chubb acquisition as noted above.

Cash Flows

Our insurance and reinsurance operations provide liquidity in that premiums are received in advance, sometimes substantially in advance, of the time claims are paid. Generally, cash flows are affected by claim payments that, due to the nature of our operations, may comprise large loss payments on a limited number of claims and which can fluctuate significantly from period to period. The irregular timing of these loss payments can create significant variations in cash flows from operations between periods. Refer to “Contractual Obligations and Commitments” for our estimate of future claim payments by period. Sources of liquidity include cash from operations, routine sales of investments, and financing arrangements. The following is a discussion of our cash flows for 2015, 2014, and 2013.

Operating cash flows reflect Net income for each period, adjusted for non-cash items and changes in working capital.

Operating cash flows were $3.9 billion in 2015, compared to $4.5 billion and $4.0 billion in 2014 and 2013, respectively. The decrease in operating cash flows of $632 million in 2015 compared to 2014 was primarily due to higher net losses paid of $478 million and higher income taxes paid of $120 million. The increase in operating cash flows of $474 million in 2014 compared to 2013 was primarily due to higher net premiums collected of $1.0 billion, partially offset by higher net losses paid of $406 million.

Cash used for investing was $6.3 billion in 2015, compared with $2.5 billion and $4.4 billion in 2014 and 2013, respectively. The increase in cash used for investing of $3.8 billion in 2015 compared to 2014 was primarily due to changes in our investment portfolios, principally an increase in short-term investments, to fund the Chubb acquisition. This decrease was offset by a net cash inflow of $264 million related to the purchase of Fireman's Fund (cash paid of $365 million, netted with

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cash acquired of $629 million). This compares to cash used for acquisitions of $766 million in 2014. The decrease in cash used for investing of $1.9 billion in 2014 compared to 2013 was primarily due to lower net purchases of fixed maturities.

Cash from (used for) financing was $3.7 billion in 2015, compared with $(1.8) billion in 2014, and $391 million in 2013. Cash from financing in 2015 included $4.9 billion of net proceeds from the issuance of long-term debt (net of repayments) partially offset by $862 million of dividends paid on Common Shares and $758 million of share repurchases. Cash used for financing in 2014 included $1.4 billion of share repurchases and $862 million of dividends paid on Common Shares. Cash flows from financing in 2013 included $947 million of proceeds from the issuance of long-term debt, partially offset by dividends paid on Common Shares of $517 million. Dividends paid on Common Shares in 2015 were flat compared to 2014 as the three percent increase in our quarterly dividend beginning with the payment made in July 2015 was offset by fewer shares outstanding as a result of share repurchases in 2015. Dividends paid on Common Shares were higher in 2014 compared to 2013, primarily due to a $0.12 per share increase in our quarterly dividend beginning with the payment made in January 2014 and an additional three percent increase beginning with the payment made in August 2014. 

Both internal and external forces influence our financial condition, results of operations, and cash flows. Claim settlements, premium levels, and investment returns may be impacted by changing rates of inflation and other economic conditions. In many cases, significant periods of time, ranging up to several years or more, may lapse between the occurrence of an insured loss, the reporting of the loss to us, and the settlement of the liability for that loss.

In the current low interest rate environment, we use repurchase agreements as a low-cost alternative for short-term funding needs and to address short-term cash timing differences without disrupting our investment portfolio holdings. At December 31, 2015, there were $1.4 billion in repurchase agreements outstanding.

In addition to cash from operations, routine sales of investments, and financing arrangements, we have agreements with a third-party bank provider which implemented two international multi-currency notional cash pooling programs to enhance cash management efficiency during periods of short-term timing mismatches between expected inflows and outflows of cash by currency. The programs allow us to optimize investment income by avoiding portfolio disruption. In each program, participating Chubb entities establish deposit accounts in different currencies with the bank provider. Each day the credit or debit balances in every account are notionally translated into a single currency (U.S. dollars) and then notionally pooled. The bank extends overdraft credit to all participating Chubb entities as needed, provided that the overall notionally pooled balance of all accounts in each pool at the end of each day is at least zero. Actual cash balances are not physically converted and are not commingled between legal entities. Chubb entities may incur overdraft balances as a means to address short-term liquidity needs. Any overdraft balances incurred under this program by a Chubb entity would be guaranteed by Chubb Limited (up to $300 million in the aggregate). Our syndicated letter of credit facility allows for same day drawings to fund a net pool overdraft should participating Chubb entities withdraw contributed funds from the pool.

Capital Resources

Capital resources consist of funds deployed or available to be deployed to support our business operations.

	December 31			December 31
(in millions of U.S. dollars, except for percentages)	2015			2014
Short-term debt	$	—		$	1,150
Long-term debt	9,447			3,357
Total financial debt	9,447			4,507
Trust preferred securities	309			309
Total shareholders’ equity	29,135			29,587
Total capitalization	$	38,891		$	34,403
Ratio of financial debt to total capitalization	24.3		%	13.1		%
Ratio of financial debt plus trust preferred securities to total capitalization	25.1		%	14.0		%

In 2015, repurchase agreements are excluded from short-term debt and disclosed separately in the consolidated balance sheets. Prior year amounts have been reclassified to conform to the current year presentation. The repurchase agreements are

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collateralized borrowings where we maintain the right and ability to redeem the collateral on short notice, unlike short-term debt which comprises the current maturities of our long-term debt instruments.

In March 2015, we issued $800 million of 3.15 percent senior notes due March 2025. The proceeds from the debt issuance are expected to be used to repay at maturity $500 million of 5.7 percent senior notes due February 2017 and $300 million of 5.8 percent senior notes due March 2018. In May 2015, ACE INA's $450 million of 5.6 percent senior notes matured and were fully paid. In November 2015, we issued $5.3 billion of senior notes, the proceeds of which were used to finance a portion of the Chubb acquisition as discussed below. In November 2015, ACE INA's $700 million of 2.6 percent senior notes matured and were fully paid. For a discussion of our debt outstanding, refer to Note 9 to the Consolidated Financial Statements.

On January 14, 2016, we acquired The Chubb Corporation for approximately $29.5 billion, comprising $14.3 billion in cash and $15.2 billion in newly-issued stock, based on the Chubb Limited (formerly ACE Limited) closing price on the acquisition date. In addition, we assumed outstanding equity awards to employees, directors, and consultants with an attributed value of approximately $340 million. We financed the cash portion of the transaction through a combination of $9 billion sourced from various Chubb Limited and Chubb Corporation companies plus $5.3 billion of senior notes as discussed above. Refer to Note 2 to the Consolidated Financial Statements for additional information.

As part of the acquisition of The Chubb Corporation, we assumed all of its senior and subordinated debt obligations, totaling $3.3 billion par value, which is guaranteed by Chubb Limited. Junior subordinated capital securities of $1 billion bear interest at a fixed rate of 6.375 percent through April 14, 2017 and at a rate equal to the three-month Libor rate plus 2.25 percent thereafter. If the current three-month Libor rate is not substantially higher in early 2017, and the near-term expectations are similar, it is our expectation that these securities would not be redeemed at the reset date. However, our expectations are subject to change depending on market conditions and other factors.

We believe our financial strength provides us with the flexibility and capacity to obtain available funds externally through debt or equity financing on both a short-term and long-term basis. Our ability to access the capital markets is dependent on, among other things, market conditions and our perceived financial strength. We have accessed both the debt and equity markets from time to time. We generally maintain the ability to issue certain classes of debt and equity securities via an unlimited SEC shelf registration which is renewed every three years. This allows us capital market access for refinancing as well as for unforeseen or opportunistic capital needs. In October 2015, we filed a new unlimited shelf registration which allows us to issue certain classes of debt and equity. This shelf registration expires in October 2018.

As part of our capital management program, in November 2014, our Board of Directors (Board) authorized the repurchase of up to $1.5 billion of Chubb’s Common Shares through December 31, 2015 to replace the prior repurchase authorization of $2.0 billion of Chubb's shares when it expired on December 31, 2014. We repurchased $734 million, $1,449 million, and $290 million of Common Shares in a series of open market transactions in 2015, 2014, and 2013, respectively. At this time, management has elected to discontinue share repurchases. There are no outstanding share repurchase authorizations at December 31, 2015. As of December 31, 2015, there were 18,268,971 Common Shares in treasury with a weighted average cost of $105.22 per share.

Common Shares

Our Common Shares had a par value of CHF 24.15 each at December 31, 2015.

Under Swiss law, dividends must be stated in Swiss francs though dividend payments are made by Chubb in U.S. dollars.

At our May 2014 annual general meeting, our shareholders approved an annual dividend for the following year of $2.60 per share, payable in four quarterly installments of $0.65 per share after the annual general meeting in the form of a distribution by way of a par value reduction.

At our May 2015 annual general meeting, our shareholders approved an annual dividend for the following year of up to $2.68 per share, expected to be paid in four quarterly installments of $0.67 per share after the annual general meeting by way of a distribution from capital contribution reserves (Additional paid-in-capital), transferred to free reserves for payment (Retained earnings). The Board will determine the record and payment dates at which the annual dividend may be paid, and is authorized to abstain from distributing a dividend at its discretion, until the date of the 2016 annual general meeting. The first three quarterly installments, each of $0.67 per share, have been distributed by the Board as expected. Refer to Note 11 to the Consolidated Financial Statements for additional information on our dividends.

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Dividend distributions on Common Shares amounted to CHF 2.56 ($2.66) per share for the year ended December 31, 2015 (including par value reductions of CHF 0.62 per share).

Contractual Obligations and Commitments

The following table presents our future payments due by period under contractual obligations at December 31, 2015:

	Payments Due By Period
					2017		2019
(in millions of U.S. dollars)	Total		2016		and 2018		and 2020		Thereafter
Payment amounts determinable from the respective contracts
Deposit liabilities(1)	$	1,259	$	23	$	45	$	35	$	1,156
Purchase obligations(2)	375		144		163		68		—
Limited partnerships – funding commitments(3)	824		415		322		87		—
Operating leases	459		111		165		97		86
Repurchase agreements	1,404		1,404		—		—		—
Long-term debt	9,461		—		802		1,800		6,859
Trust preferred securities	309		—		—		—		309
Interest on debt obligations	5,075		390		728		644		3,313
Total obligations in which payment amounts are determinable from the respective contracts	19,166		2,487		2,225		2,731		11,723
Payment amounts not determinable from the respective contracts
Estimated gross loss payments under insurance and reinsurance contracts	37,348		9,257		9,811		5,283		12,997
Estimated payments for future policy benefits	20,090		814		1,786		1,498		15,992
Total contractual obligations and commitments	$	76,604	$	12,558	$	13,822	$	9,512	$	40,712

⁽¹⁾  Refer to Note 1 k) to the Consolidated Financial Statements.

⁽²⁾  Primarily comprises audit fees and agreements with vendors to purchase system software administration and maintenance services.

⁽³⁾  The timing of the payments of these commitments is uncertain and will differ from the estimated timing in the table.

The above table excludes the following items:

• Pension obligations: Minimum funding requirements for our pension obligations are immaterial. Subsequent funding commitments are apt to vary due to many factors and are difficult to estimate at this time. Refer to Note 13 to the Consolidated Financial Statements for additional information.

• Liabilities for unrecognized tax benefits: The liability for unrecognized tax benefits, excluding interest, was $16 million at December 31, 2015. We recognize accruals for interest and penalties, if any, related to unrecognized tax benefits in Income tax expense in the consolidated statements of operations. At December 31, 2015, we had $4 million in liabilities for income tax-related interest and penalties in our consolidated balance sheets. We are unable to make a reasonably reliable estimate for the timing of cash settlement with respect to these liabilities. Refer to Note 8 to the Consolidated Financial Statements for additional information.

We have no other significant contractual obligations or commitments not reflected in the table above. We do not have any off-balance sheet arrangements that are reasonably likely to have a material effect on our financial condition, changes in financial condition, revenues or expenses, results of operations, liquidity, capital expenditures, or capital resources.

Estimated gross loss payments under insurance and reinsurance contracts

We are obligated to pay claims under insurance and reinsurance contracts for specified loss events covered under those contracts. Such loss payments represent our most significant future payment obligation as a P&C insurance and reinsurance company. In contrast to other contractual obligations, cash payments are not determinable from the terms specified within the contract. For example, we do not ultimately make a payment to our counterparty for many insurance and reinsurance contracts

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(i.e., when a loss event has not occurred) and if a payment is to be made, the amount and timing cannot be determined from the contract. In the table above, we estimate payments by period relating to our gross liability for unpaid losses and loss expenses included in the consolidated balance sheet at December 31, 2015, and do not take into account reinsurance recoverable. These estimated loss payments are inherently uncertain and the amount and timing of actual loss payments are likely to differ from these estimates and the differences could be material. Given the numerous factors and assumptions involved in both estimates of loss and loss expense reserves and related estimates as to the timing of future loss and loss expense payments in the table above, differences between actual and estimated loss payments will not necessarily indicate a commensurate change in ultimate loss estimates. The liability for unpaid losses and loss expenses presented in our balance sheet is discounted for certain structured settlements for which the timing and amount of future claim payments are reliably determinable and certain reserves for unsettled claims that are discounted in statutory filings. Accordingly, the estimated amounts in the table exceed the liability for Unpaid losses and loss expenses presented in our balance sheet. Refer to Note 1 h) to the Consolidated Financial Statements for additional information.

Estimated payments for future policy benefits

We establish reserves for future policy benefits for life, long-term health, and annuity contracts.  The amounts in the table are gross of fees or premiums due from the underlying contracts.  The liability for future policy benefits for life, long-term health, and annuity contracts presented in our balance sheet is discounted and reflected net of fees or premiums due from the underlying contracts.  Accordingly, the estimated amounts in the table exceed the liability for future policy benefits presented in our balance sheet.  Payment amounts related to these reserves must be estimated and are not determinable from the contract.  Due to the uncertainty with respect to the timing and amount of these payments, actual results could materially differ from the estimates in the table.

Credit Facilities

As our Bermuda subsidiaries are non-admitted insurers and reinsurers in the U.S., the terms of certain U.S. insurance and reinsurance contracts require them to provide collateral, which can be in the form of letters of credit (LOCs). LOCs may also be used for general corporate purposes.

In December 2015, we increased our existing $1.0 billion unsecured operational LOC facility guaranteed by Chubb Limited expiring in November 2017 to $1.5 billion with the consent of the issuers. We are allowed to use up to $300 million of this LOC facility as an unsecured revolving credit facility. At December 31, 2015, outstanding LOCs issued under this facility were $797 million.

It is anticipated that our $1.5 billion unsecured operational LOC facility will be renewed on expiry but such renewal is subject to the availability of credit from banks utilized by Chubb. In the event that such credit support is insufficient, we could be required to provide alternative security to clients. This could take the form of additional insurance trusts supported by our investment portfolio or funds withheld using our cash resources. The value of LOCs required is driven by, among other things, statutory liabilities reported by variable annuity guarantee reinsurance clients, loss development of existing reserves, the payment pattern of such reserves, the expansion of business, and loss experience of such business.

The facility noted above requires that we maintain certain covenants, all of which have been met at December 31, 2015. These covenants include:

(i) Maintenance of a minimum consolidated net worth in an amount not less than the “Minimum Amount”. For the purpose of this calculation, the Minimum Amount is an amount equal to the sum of the base amount (currently $20.7 billion) plus 25 percent of consolidated net income for each fiscal quarter, ending after the date on which the current base amount became effective, plus 50 percent of any increase in consolidated net worth during the same period, attributable to the issuance of Common and Preferred Shares. The Minimum Amount is subject to an annual reset provision.

(ii) Maintenance of a maximum debt to total capitalization ratio of not greater than 0.35 to 1. Under this covenant, debt does not include repurchase agreements, trust preferred securities or mezzanine equity, except where the ratio of the sum of trust preferred securities and mezzanine equity to total capitalization is greater than 15 percent. In this circumstance, the amount greater than 15 percent would be included in the financial debt to total capitalization ratio.

At December 31, 2015, (a) the minimum consolidated net worth requirement under the covenant described in (i) above was $21.4 billion and our actual consolidated net worth as calculated under that covenant was $28.3 billion and (b) our ratio of

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financial debt to total capitalization was .243 to 1, which is below the maximum debt to total capitalization ratio of 0.35 to 1 as described in (ii) above.

Our failure to comply with the covenants under any credit facility would, subject to grace periods in the case of certain covenants, result in an event of default. This could require us to repay any outstanding borrowings or to cash collateralize LOCs under such facility. Our failure to repay material financial obligations, as well as our failure with respect to certain other events expressly identified, would result in an event of default under the facility.

Ratings

Chubb Limited and its subsidiaries are assigned credit and financial strength (insurance) ratings from internationally recognized rating agencies, including S&P, A.M. Best, Moody's, and Fitch. The ratings issued on our companies by these agencies are announced publicly and are available directly from the agencies. Our Internet site (investors.chubb.com, under Resources) also contains some information about our ratings, but such information on our website is not incorporated by reference into this report.

Financial strength ratings reflect the rating agencies' opinions of a company's claims paying ability. Independent ratings are one of the important factors that establish our competitive position in the insurance markets. The rating agencies consider many factors in determining the financial strength rating of an insurance company, including the relative level of statutory surplus necessary to support the business operations of the company. These ratings are based upon factors relevant to policyholders, agents, and intermediaries and are not directed toward the protection of investors. Such ratings are not recommendations to buy, sell, or hold securities.

Credit ratings assess a company's ability to make timely payments of principal and interest on its debt.

It is possible that, in the future, one or more of the rating agencies may reduce our existing ratings. If one or more of our ratings were downgraded, we could incur higher borrowing costs, and our ability to access the capital markets could be impacted. In addition, our insurance and reinsurance operations could be adversely impacted by a downgrade in our financial strength ratings, including a possible reduction in demand for our products in certain markets. Also, we have insurance and reinsurance contracts which contain rating triggers. In the event the S&P or A.M. Best financial strength ratings of Chubb fall, we may be faced with the cancellation of premium or be required to post collateral on our underlying obligation associated with this premium. We estimate that at December 31, 2015, a one-notch downgrade of our S&P or A.M. Best financial strength ratings would result in an immaterial loss of premium or requirement for collateral to be posted.

ITEM 7A. Quantitative and Qualitative Disclosures about Market Risk

Market Sensitive Instruments and Risk Management

Market risk represents the potential for loss due to adverse changes in the fair value of financial instruments. We are exposed to potential losses from various market risks including changes in interest rates, equity prices, and foreign currency exchange rates. Further, through writing the GLB and GMDB products, we are exposed to volatility in the equity and credit markets, as well as interest rates. Our investment portfolio consists primarily of fixed income securities, denominated in both U.S. dollars and foreign currencies, which are sensitive to changes in interest rates and foreign currency exchange rates. The majority of our fixed income portfolio is classified as available for sale. The effect of market movements on our available for sale investment portfolio impacts Net income (through Net realized gains (losses)) when securities are sold or when we record an OTTI charge in Net income. Changes in interest rates and foreign currency exchange rates will have an immediate effect on Shareholders' equity and Comprehensive income and in certain instances, Net income. From time to time, we also use derivative instruments such as futures, options, swaps, and foreign currency forward contracts to manage the duration of our investment portfolio and foreign currency exposures and also to obtain exposure to a particular financial market. At December 31, 2015 and 2014, our notional exposure to derivative instruments was $3.1 billion and $7.4 billion, respectively. These instruments are recognized as assets or liabilities in our consolidated financial statements and are sensitive to changes in interest rates, foreign currency exchange rates, and equity security prices. As part of our investing activities, we from time to time purchase to be announced mortgage backed securities (TBAs). Changes in the fair value of TBAs are included in Net realized gains (losses) and therefore, have an immediate effect on both our Net income and Shareholders' equity.

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We seek to mitigate market risk using a number of techniques, including maintaining and managing the assets and liabilities of our international operations consistent with the foreign currencies of the underlying insurance and reinsurance businesses, thereby limiting exchange rate risk to net assets denominated in foreign currencies.

The following is a discussion of our primary market risk exposures at December 31, 2015. Our policies to address these risks in 2015 were not materially different from 2014. We do not currently anticipate significant changes in our primary market risk exposures or in how those exposures are managed in future reporting periods based upon what is known or expected to be in effect in future reporting periods.

Interest rate risk – fixed income portfolio and debt obligations

Our fixed income portfolio and debt obligations have exposure to interest rate risk. Changes in investment values attributable to interest rate changes are mitigated by corresponding and partially offsetting changes in the economic value of our insurance reserves and debt obligations. We monitor this exposure through periodic reviews of our asset and liability positions.

The following table presents the impact at December 31, 2015 and 2014, on the fair value of our fixed income portfolio of a hypothetical increase in interest rates of 100 bps applied instantly across the U.S. yield curve (an immediate time horizon was used as this presents the worst case scenario):

(in billions of U.S. dollars, except for percentages)		2015			2014
Fair value of fixed income portfolio		$	62.6		$	59.3
Pre-tax impact of 100 bps increase in interest rates:
	In dollars	$	2.2		$	2.4
	As a percentage of total fixed income portfolio at fair value	3.5		%	4.0		%

Changes in interest rates will have an immediate effect on Comprehensive income and Shareholders' equity but will not ordinarily have an immediate effect on Net income. Variations in market interest rates could produce significant changes in the timing of prepayments due to available prepayment options. For these reasons, actual results could differ from those reflected in the tables.

Although our debt and trust preferred securities (collectively referred to as debt obligations) are reported at amortized cost and not adjusted for fair value changes, changes in interest rates could have a material impact on their fair value, albeit there would be no impact on our consolidated financial statements.

The following table presents the impact at December 31, 2015 and 2014, on the fair value of our debt obligations of a hypothetical decrease in interest rates of 100 bps applied instantly across the U.S. yield curve (an immediate time horizon was used as this presents the worst case scenario):

(in millions of U.S. dollars, except for percentages)		2015			2014
Fair value of debt obligations, including repurchase agreements		$	11,528		$	6,723
Impact of 100 bps decrease in interest rates:
	In dollars	$	921		$	362
	As a percentage of total debt obligations at fair value	8.0		%	5.4		%

Foreign currency management

As a global company, Chubb entities transact business in multiple currencies. Our policy is to generally match assets, liabilities and required capital for each individual jurisdiction in local currency, which would include the use of derivatives. We do not hedge our net asset non-U.S. dollar capital positions; however, we do consider hedging for planned cross border transactions.

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The following table summarizes the net assets in non-U.S. currencies at December 31, 2015 and 2014:

				2015				2014	2015 vs. 2014 % change in exchange rate per USD
	Value of			Exchange rate	Value of			Exchange rate
(in millions of U.S. dollars, except for percentages)	Net Assets			per USD	Net Assets			per USD
British pound sterling (GBP)	$	1,200		1.4736	$	1,274		1.5577	(5.4	)%
Euro (EUR)	749			1.0862	704			1.2098	(10.2	)%
Mexican peso (MXN)	683			0.0581	822			0.0678	(14.3	)%
Brazilian real (BRL)	682			0.2525	918			0.3763	(32.9	)%
Korean Won (KRW) (x100)	613			0.0851	559			0.0917	(7.2	)%
Canadian dollar (CAD)	507			0.7226	580			0.8605	(16.0	)%
Japanese yen (JPY)	493			0.0083	476			0.0084	(1.2	)%
Thailand Baht (THB)	377			0.0278	381			0.0304	(8.6	)%
Australian dollar (AUD)	373			0.7286	509			0.8175	(10.9	)%
Other foreign currencies	1,189			various	1,254			various	NM
Value of net assets denominated in foreign currencies	$	6,866			$	7,477
As a percentage of total net assets	23.6		%		25.3		%
Pre-tax impact on Shareholders' equity of a hypothetical 10 percent strengthening of the U.S. dollar	$	624			$	677

Reinsurance of GMDB and GLB guarantees

Chubb views its variable annuity reinsurance business as having a similar risk profile to that of catastrophe reinsurance with the probability of long-term economic loss relatively small, at the time of pricing. Adverse changes in market factors and policyholder behavior will have an impact on both life underwriting income and net income. When evaluating these risks, we expect to be compensated for taking both the risk of a cumulative long-term economic net loss, as well as the short-term accounting variations caused by these market movements. Therefore, we evaluate this business in terms of its long-term economic risk and reward.

Net income is directly impacted by changes in benefit reserves calculated in connection with reinsurance of variable annuity guarantees, primarily GMDB and GLB. In addition, net income is directly impacted by changes in the fair value of the GLB liability (FVL), which is classified as a derivative for accounting purposes. The FVL established for a GLB reinsurance contract represents the difference between the fair value of the contract and the benefit reserves. Benefit reserves and FVL calculations are directly affected by market factors, including equity levels, interest rate levels, credit risk, and implied volatilities, as well as policyholder behaviors, such as annuitization and lapse rates.

89

The tables below are estimates of the sensitivities to instantaneous changes in economic inputs (e.g., equity shock, interest rate shock etc.) or actuarial assumptions at December 31, 2015 of the FVL and of the fair value of specific derivative instruments held (hedge value) to partially offset the risk in the variable annuity guarantee reinsurance portfolio. The following assumptions should be considered when using the below tables:

• No changes to the benefit ratio used to establish benefit reserves at December 31, 2015.

• Equity shocks impact all global equity markets equally

• Our liabilities are sensitive to global equity markets in the following proportions: 70 percent—80 percent U.S. equity, 10 percent—20 percent international equity ex-Japan, up to 10 percent Japan equity.

• Our current hedge portfolio is sensitive to global equity markets in the following proportions: 100 percent U.S. equity.

• We would suggest using the S&P 500 index as a proxy for U.S. equity, the MSCI EAFE index as a proxy for international equity, and the TOPIX as a proxy for Japan equity.

• Interest rate shocks assume a parallel shift in the U.S. yield curve

• Our liabilities are also sensitive to global interest rates at various points on the yield curve, mainly the U.S. Treasury curve in the following proportions: up to 10 percent short-term rates (maturing in less than 5 years), 20 percent—30 percent medium-term rates (maturing between 5 years and 10 years, inclusive), and 70 percent—80 percent long-term rates (maturing beyond 10 years).

• A change in AA-rated credit spreads (AA-rated credit spreads are a proxy for both our own credit spreads and the credit spreads of the ceding insurers) impacts the rate used to discount cash flows in the fair value model.

• The hedge sensitivity is from December 31, 2015 market levels.

• The sensitivities are not directly additive because changes in one factor will affect the sensitivity to changes in other factors. The sensitivities do not scale linearly and may be proportionally greater for larger movements in the market factors. The sensitivities may also vary due to foreign exchange rate fluctuations. The calculation of the FVL is based on internal models that include assumptions regarding future policyholder behavior, including lapse, annuitization, and asset allocation. These assumptions impact both the absolute level of the FVL as well as the sensitivities to changes in market factors shown below. Actual sensitivity of our net income may differ from those disclosed in the tables below due to differences between short-term market movements and management judgment regarding the long-term assumptions implicit in our benefit ratios. Furthermore, the sensitivities below could vary by multiples of the sensitivities in the tables below.

• In addition, the tables below do not reflect the expected quarterly run rate of net income generated by the variable annuity guarantee reinsurance portfolio if markets remain unchanged during the period. All else equal, if markets remain unchanged during the period, the Gross FVL will increase, resulting in a realized loss. The realized loss occurs primarily because, during the period, we will collect premium on the full population while only 55 percent of that population has become eligible to annuitize and generate a claim (since approximately 45 percent of policies are not eligible to annuitize until after December 31, 2015). This increases the Gross FVL because future premiums are lower by the amount collected in the quarter, and also because future claims are discounted for a shorter period. We refer to this increase in Gross FVL as “timing effect”. The unfavorable impact of timing effect on our Gross FVL in a quarter is not reflected in the sensitivity tables below. For this reason, when using the tables below to estimate the sensitivity of Gross FVL in the first quarter 2016 to various changes, it is necessary to assume an additional $5 million to $45 million increase in Gross FVL and realized losses. However, the impact to Net income is substantially mitigated because the majority of this realized loss is offset by the positive quarterly run rate of Life underwriting income generated by the variable annuity guarantee reinsurance portfolio if markets remain unchanged during the period. Note that both the timing effect and the quarterly run rate of Life underwriting income change over time as the book ages.

90

Interest Rate Shock		Worldwide Equity Shock
(in millions of U.S. dollars)		+10		%	Flat			-10		%	-20		%	-30		%	-40		%
+100 bps	(Increase)/decrease in Gross FVL	$	457		$	314		$	60		$	(258	)	$	(634	)	$	(1,064	)
	Increase/(decrease) in hedge value	(120		)	—			120			239			359			479
	Increase/(decrease) in net income	$	337		$	314		$	180		$	(19	)	$	(275	)	$	(585	)
Flat	(Increase)/decrease in Gross FVL	$	233		$	—		$	(304	)	$	(667	)	$	(1,088	)	$	(1,555	)
	Increase/(decrease) in hedge value	(120		)	—			120			239			359			479
	Increase/(decrease) in net income	$	113		$	—		$	(184	)	$	(428	)	$	(729	)	$	(1,076	)
-100 bps	(Increase)/decrease in Gross FVL	$	(108	)	$	(389	)	$	(738	)	$	(1,143	)	$	(1,601	)	$	(2,090	)
	Increase/(decrease) in hedge value	(120		)	—			120			239			359			479
	Increase/(decrease) in net income	$	(228	)	$	(389	)	$	(618	)	$	(904	)	$	(1,242	)	$	(1,611	)
Sensitivities to Other Economic Variables		AA-rated Credit Spreads						Interest Rate Volatility						Equity Volatility
(in millions of U.S. dollars)		+100 bps			-100 bps			+2		%	-2		%	+2		%	-2		%
(Increase)/decrease in Gross FVL		$	68		$	(76	)	$	7		$	—		$	(15	)	$	13
Increase/(decrease) in hedge value		—			—			—			—			—			—
Increase/(decrease) in net income		$	68		$	(76	)	$	7		$	—		$	(15	)	$	13
Sensitivities to Actuarial Assumptions								Mortality
(in millions of U.S. dollars)								+20		%	+10		%	-10		%	-20		%
(Increase)/decrease in Gross FVL								$	26		$	13		$	(13	)	$	(27	)
Increase/(decrease) in hedge value								—			—			—			—
Increase/(decrease) in net income								$	26		$	13		$	(13	)	$	(27	)
								Lapses
(in millions of U.S. dollars)								+50		%	+25		%	-25		%	-50		%
(Increase)/decrease in Gross FVL								$	252		$	140		$	(172	)	$	(367	)
Increase/(decrease) in hedge value								—			—			—			—
Increase/(decrease) in net income								$	252		$	140		$	(172	)	$	(367	)
								Annuitization
(in millions of U.S. dollars)								+50		%	+25		%	-25		%	-50		%
(Increase)/decrease in Gross FVL								$	(345	)	$	(191	)	$	238		$	443
Increase/(decrease) in hedge value								—			—			—			—
Increase/(decrease) in net income								$	(345	)	$	(191	)	$	238		$	443

Variable Annuity Net Amount at Risk

All our VA reinsurance treaties include annual or aggregate claim limits and many include an aggregate deductible which limit the net amount at risk under these programs. The tables below present the net amount at risk at December 31, 2015 following an immediate change in equity market levels, assuming all global equity markets are impacted equally. For further information on the net amount at risk, refer to Note 5 c) to the Consolidated Financial Statements.

a) Reinsurance covering the GMDB risk only

	Equity Shock
(in millions of U.S. dollars)	+20		%	Flat		-20		%	-40		%	-60		%	-80		%
GMDB net amount at risk	$	359		$	364	$	854		$	1,246		$	1,211		$	1,031
Claims at 100% immediate mortality	207			229		253			254			237			219

91

The treaty claim limits function as a ceiling on the net amount at risk as equity markets fall. In addition, if all of the policyholders were to die immediately the claims payable declines as equity markets fall due to the specific nature of these claim limits, many of which are annual claim limits calculated as a percentage of the reinsured account value. There is also some impact due to a small portion of the GMDB reinsurance under which claims are positively correlated to equity markets (claims decrease as equity markets fall).

b) Reinsurance covering the GLB risk only

	Equity Shock
(in millions of U.S. dollars)	+20		%	Flat		-20		%	-40		%	-60		%	-80		%
GLB net amount at risk	$	385		$	733	$	1,403		$	2,286		$	2,778		$	3,016

The treaty claim limits cause the net amount at risk to increase at a declining rate as equity markets fall.

c) Reinsurance covering both the GMDB and GLB risks on the same underlying policyholders

	Equity Shock
(in millions of U.S. dollars)	+20		%	Flat		-20		%	-40		%	-60		%	-80		%
GMDB net amount at risk	$	66		$	89	$	115		$	136		$	152		$	163
GLB net amount at risk	243			422		749			1,230			1,663			2,009
Claims at 100% immediate mortality	19			56		231			359			459			555

The treaty limits control the increase in the GMDB net amount at risk as equity markets fall. The GMDB net amount at risk continues to grow as equity markets fall because most of these reinsurance treaties do not have annual claim limits calculated as a percentage of the underlying account value.

The treaty limits cause the GLB net amount at risk to increase at a declining rate as equity markets fall.

ITEM 8. Financial Statements and Supplementary Data

The financial statements and supplementary data are included in this Form 10-K commencing on page F-1.

ITEM 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

None.

ITEM 9A. Controls and Procedures

Chubb’s management, with the participation of Chubb’s Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of Chubb’s disclosure controls and procedures as defined in Rule 13a-15(e) and Rule 15d-15(e) under the Securities Exchange Act of 1934 as of December 31, 2015. Based upon that evaluation, Chubb’s Chief Executive Officer and Chief Financial Officer concluded that Chubb’s disclosure controls and procedures are effective in allowing information required to be disclosed in reports filed under the Securities and Exchange Act of 1934 to be recorded, processed, summarized, and reported within time periods specified in the rules and forms of the SEC, and that such information is accumulated and communicated to Chubb’s management, including its Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure.

There has been no change in Chubb’s internal controls over financial reporting during the three months ended December 31, 2015 that has materially affected, or is reasonably likely to materially affect, Chubb’s internal controls over financial reporting. Chubb's management report on internal control over financial reporting is included on page F-3 and PricewaterhouseCoopers LLP's audit report is included on page F-4.

ITEM 9B. Other Information

None.

92

PART III

ITEM 10. Directors, Executive Officers and Corporate Governance

Information pertaining to this item is incorporated by reference to the sections entitled “Agenda Item 5 - Election of the Board of Directors”, “Corporate Governance - Director Nomination Process and Annual Board Skills Review”, “Corporate Governance - The Committees of the Board - Audit Committee”,and “Corporate Governance - Did Our Officers and Directors Comply with Section 16(a) Beneficial Ownership Reporting in 2015?” of the definitive proxy statement for the 2016 Annual General Meeting of Shareholders which will be filed with the SEC not later than 120 days after the close of the fiscal year pursuant to regulation 14A. Also incorporated herein by reference is the text under the caption “Executive Officers of the Registrant” appearing at the end of Part I Item 1 of the Annual Report on Form 10-K.

Code of Ethics

Chubb has adopted a Code of Conduct, which sets forth standards by which all Chubb employees, officers, and directors must abide as they work for Chubb. Chubb has posted this Code of Conduct on its Internet site (investors.chubb.com, under Corporate Governance/ Integrity First: The Chubb Code of Conduct). Chubb intends to disclose on its Internet site any amendments to, or waivers from, its Code of Conduct that are required to be publicly disclosed pursuant to the rules of the SEC or the New York Stock Exchange.

ITEM 11. Executive Compensation

This item is incorporated by reference to the sections entitled “Executive Compensation”, “Compensation Committee Report” and “Director Compensation” of the definitive proxy statement for the 2016 Annual General Meeting of Shareholders which will be filed with the SEC not later than 120 days after the close of the fiscal year pursuant to Regulation 14A.

ITEM 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

This item is incorporated by reference to the sections entitled “Information About our Share Ownership” and “Agenda Item 10 - Approval of the Chubb Limited 2016 Long-Term Incentive Plan - Authorized Securities under Equity Compensation Plans” of the definitive proxy statement for the 2016 Annual General Meeting of Shareholders which will be filed with the SEC not later than 120 days after the close of the fiscal year pursuant to Regulation 14A.

ITEM 13. Certain Relationships and Related Transactions and Director Independence

This item is incorporated by reference to the sections entitled “Corporate Governance - What Is Our Related Party Transactions Approval Policy and What Procedures Do We Use to Implement It?”, “Corporate Governance - What Related Person Transactions Do We Have?”, and “Corporate Governance - The Board of Directors - Director Independence and Other Information” of the definitive proxy statement for the 2016 Annual General Meeting of Shareholders which will be filed with the SEC not later than 120 days after the close of the fiscal year pursuant to Regulation 14A.

ITEM 14. Principal Accounting Fees and Services

This item is incorporated by reference to the section entitled “Agenda Item 4 – 4.2 - Election of Auditors - Ratification of appointment of PricewaterhouseCoopers LLP (United States) as independent registered public accounting firm for purposes of U.S. securities law reporting” of the definitive proxy statement for the 2016 Annual General Meeting of Shareholders which will be filed with the SEC not later than 120 days after the close of the fiscal year pursuant to Regulation 14A.

93

PART IV

ITEM 15. Exhibits, Financial Statement Schedules

(a)Financial Statements, Schedules, and Exhibits

		Page
1.	Consolidated Financial Statements
–	Management's Responsibility for Financial Statements and Internal Control over Financial Reporting	F-3
–	Report of Independent Registered Public Accounting Firm	F-4
–	Consolidated Balance Sheets at December 31, 2015 and 2014	F-5
–	Consolidated Statements of Operations and Comprehensive Income for the years ended December 31, 2015, 2014, and 2013	F-6
–	Consolidated Statements of Shareholders' Equity for the years ended December 31, 2015, 2014, and 2013	F-7
–	Consolidated Statements of Cash Flows for the years ended December 31, 2015, 2014, and 2013	F-8
–	Notes to Consolidated Financial Statements	F-9
2.	Financial Statement Schedules
–	Schedule I - Summary of Investments - Other Than Investments in Related Parties	F-80
–	Schedule II - Condensed Financial Information of Registrant (Parent Company Only)	F-81
–	Schedule IV - Supplemental Information Concerning Reinsurance	F-84
–	Schedule VI - Supplementary Information Concerning Property and Casualty Operations	F-85

Other schedules have been omitted as they are not applicable to Chubb, or the required information has been included in the Consolidated Financial Statements and related notes.
3.	Exhibits

			Incorporated by Reference
Exhibit Number	Exhibit Description	Form	Original Number	Date Filed	Filed Herewith
2.1	Agreement and Plan of Merger, by and among ACE Limited, William Investment Holdings Corporation and The Chubb Corporation, dated as of June 30, 2015	8-K	2.1	July 7, 2015
3.1	Articles of Association of the Company, as amended and restated	8-K	3.1	January 15, 2016
3.2	Organizational Regulations of the Company as amended	8-K	3.2	May 22, 2015
4.1	Articles of Association of the Company, as amended and restated	S-3	4.1(b)	October 23, 2015
4.2	Organizational Regulations of the Company as amended	8-K	4.2	May 22, 2015
4.3	Specimen share certificate representing Common Shares	8-K	4.3	July 18, 2008
4.4	Form of 2.6 percent Senior Notes due 2015	8-K	4.1	November 23, 2010
4.5	Indenture, dated March 15, 2002, between ACE Limited and Bank One Trust Company, N.A.	8-K	4.1	March 22, 2002
4.6	Senior Indenture, dated August 1, 1999, among ACE INA Holdings, Inc., ACE Limited and Bank of New York Mellon Trust Company, N.A. (as successor), as trustee	S-3 ASR	4.4	December 10, 2014

94

			Incorporated by Reference
Exhibit Number	Exhibit Description	Form	Original Number	Date Filed	Filed Herewith
4.7	Indenture, dated November 30, 1999, among ACE INA Holdings, Inc. and Bank One Trust Company, N.A., as trustee	10-K	10.38	March 29, 2000
4.8	Indenture, dated December 1, 1999, among ACE INA Holdings, Inc., ACE Limited and Bank One Trust Company, National Association, as trustee	10-K	10.41	March 29, 2000
4.9	Amended and Restated Trust Agreement, dated March 31, 2000, among ACE INA Holdings, Inc., Bank One Trust Company, National Association, as property trustee, Bank One Delaware Inc., as Delaware trustee and the administrative trustees named therein	10-K	4.17	March 16, 2006
4.10	Common Securities Guarantee Agreement, dated March 31, 2000	10-K	4.18	March 16, 2006
4.11	Capital Securities Guarantee Agreement, dated March 31, 2000	10-K	4.19	March 16, 2006
4.12	Form of 2.70 percent Senior Notes due 2023	8-K	4.1	March 13, 2013
4.13	Form of 4.15 percent Senior Notes due 2043	8-K	4.2	March 13, 2013
4.14	First Supplemental Indenture dated as of March 13, 2013 to the Indenture dated as of August 1, 1999 among ACE INA Holdings, Inc., as Issuer, ACE Limited, as Guarantor, and The Bank of New York Mellon Trust Company, N.A., as Successor Trustee	8-K	4.3	March 13, 2013
4.15	Form of 3.35 percent Senior Notes due 2024	8-K	4.1	May 27, 2014
4.16	Form of 3.150 percent Senior Notes due 2025	8-K	4.1	March 16, 2015
4.17	Form of 2.30 percent Senior Notes due 2020	8-K	4.1	November 3, 2015
4.18	Form of 2.875 percent Senior Notes due 2022	8-K	4.2	November 3, 2015
4.19	Form of 3.35 percent Senior Notes due 2026	8-K	4.3	November 3, 2015
4.20	Form of 4.35 percent Senior Notes due 2045	8-K	4.4	November 3, 2015
4.21	First Supplemental Indenture to the Chubb Corp Senior Indenture dated as of January 15, 2016 to the Indenture dated as of October 25, 1989 among ACE INA Holdings, Inc., as Successor Issuer, ACE Limited, as Guarantor, and The Bank of New York Mellon Trust Company, N.A., as Trustee	8-K	4.1	January 15, 2016
4.22	Second Supplemental Indenture to the Chubb Corp Junior Subordinated Indenture dated as of January 15, 2016 to the Indenture dated as of March 29, 2007 among ACE INA Holdings, Inc., as Successor Issuer, ACE Limited, as Guarantor, and The Bank of New York Mellon Trust Company, N.A., as Trustee	8-K	4.2	January 15, 2016
4.23	Chubb Corp Senior Indenture (incorporated by reference to Exhibit 4(a) to Chubb Corp's Registration Statement on Form S-3 filed on October 27, 1989) (File No. 33-31796)	S-3	4(a)	October 27, 1989
4.24	Chubb Corp Junior Subordinated Indenture (incorporated by reference to Exhibit 4.1 to Chubb Corp's Current Report on Form 8-K filed on March 30, 2007) (File No. 001-08661)	8-K	4.1	March 30, 2007

95

			Incorporated by Reference
Exhibit Number	Exhibit Description	Form	Original Number	Date Filed	Filed Herewith
4.25	First Supplemental Indenture to the Chubb Corp Junior Subordinated Indenture dated as of March 29, 2007 between the Chubb Corporation and The Bank of New York Trust Company, N.A., as Trustee (incorporated by reference to Exhibit 4.2 to Chubb Corp's Current Report on Form 8-K filed on March 30, 2007) (File No. 001-08661)	8-K	4.2	March 30, 2007
4.26	Form of 5.75 percent Chubb Corp Senior Notes due 2018 (incorporated by reference to Exhibit 4.1 to Chubb Corp's Current Report on Form 8-K filed on May 6, 2008) (File No. 001-08661)	8-K	4.1	May 6, 2008
4.27	Form of 6.60 percent Chubb Corp Debentures due 2018 (incorporated by reference to Exhibit 4(a) to Chubb Corp's Registration Statement on Form S-3 filed on October 27, 1989) (File No. 33-31796)	S-3	4(a)	October 27, 1989
4.28	Form of 6.80 percent Chubb Corp Debentures due 2031 (incorporated by reference to Exhibit 4(a) to Chubb Corp's Registration Statement on Form S-3 filed on October 27, 1989) (File No. 33-31796)	S-3	4(a)	October 27, 1989
4.29	Form of 6.00 percent Chubb Corp Senior Notes due 2037 (incorporated by reference to Exhibit 4.1 to Chubb Corp's Current Report on Form 8-K filed on May 11, 2007) (File No. 001-08661)	8-K	4.1	May 11, 2007
4.30	Form of 6.50 percent Chubb Corp Senior Notes due 2038 (incorporated by reference to Exhibit 4.2 to Chubb Corp's Current Report on Form 8-K filed on May 6, 2008) (File No. 001-08661)	8-K	4.2	May 6, 2008
4.31	Form of debenture for the 6.375 percent Chubb Corp DISCs (incorporated by reference to Exhibit 4.3 to Chubb Corp's Current Report on Form 8-K filed on March 30, 2007) (File No. 001-08661)	8-K	4.3	March 30, 2007
10.1*	Form of Indemnification Agreement between the Company and the directors of the Company, dated August 13, 2015				X
10.2	Credit Agreement for $1,000,000,000 Senior Unsecured Letter of Credit Facility, dated as of November 6, 2012, among ACE Limited, and certain subsidiaries and Wells Fargo Bank, National Association as Administrative Agent, the Swingline Bank and an Issuing Bank	10-K	10.13	February 28, 2013
10.3*	Employment Terms dated October 29, 2001, between ACE Limited and Evan Greenberg	10-K	10.64	March 27, 2003
10.4*	Employment Terms dated November 2, 2001, between ACE Limited and Philip V. Bancroft	10-K	10.65	March 27, 2003
10.5*	Executive Severance Agreement between ACE Limited and Philip Bancroft, effective January 2, 2002	10-Q	10.1	May 10, 2004
10.6*	Letter Regarding Executive Severance between ACE Limited and Philip V. Bancroft	10-K	10.17	February 25, 2011
10.7*	Employment Terms dated April 10, 2006, between ACE and John Keogh	10-K	10.29	February 29, 2008
10.8*	Executive Severance Agreement between ACE and John Keogh	10-K	10.30	February 29, 2008

96

			Incorporated by Reference
Exhibit Number	Exhibit Description	Form	Original Number	Date Filed	Filed Herewith
10.9*	ACE Limited Executive Severance Plan as amended effective May 18, 2011	10-K	10.21	February 24, 2012
10.10*	Form of employment agreement between the Company (or subsidiaries of the Company) and executive officers of the Company to allocate a percentage of aggregate salary to the Company (or subsidiaries of the Company)	8-K	10.1	July 16, 2008
10.11*	Description of Executive Officer Cash Compensation for 2011	10-Q	10.1	November 3, 2011
10.12*	Description of Directors Compensation	10-Q	10.1	May 2, 2014
10.13*	ACE Limited Annual Performance Incentive Plan	S-1	10.13	January 21, 1993
10.14*	ACE Limited Elective Deferred Compensation Plan (as amended and restated effective January 1, 2005)	10-K	10.24	March 16, 2006
10.15*	ACE USA Officer Deferred Compensation Plan (as amended through January 1, 2001)	10-K	10.25	March 16, 2006
10.16*	ACE USA Officer Deferred Compensation Plan (as amended and restated effective January 1, 2011)	10-Q	10.7	October 30, 2013
10.17*	ACE USA Officer Deferred Compensation Plan (as amended and restated effective January 1, 2009)	10-K	10.36	February 27, 2009
10.18*	First Amendment to the Amended and Restated ACE USA Officers Deferred Compensation Plan	10-K	10.28	February 25, 2010
10.19*	Form of Swiss Mandatory Retirement Benefit Agreement (for Swiss-employed named executive officers)	10-Q	10.2	May 7, 2010
10.20*	ACE Limited Supplemental Retirement Plan (as amended and restated effective July 1, 2001)	10-Q	10.1	November 14, 2001
10.21*	ACE Limited Supplemental Retirement Plan (as amended and restated effective January 1, 2011)	10-Q	10.6	October 30, 2013
10.22*	Amendments to the ACE Limited Supplemental Retirement Plan and the ACE Limited Elective Deferred Compensation Plan	10-K	10.38	February 29, 2008
10.23*	ACE Limited Elective Deferred Compensation Plan (as amended and restated effective January 1, 2009)	10-K	10.39	February 27, 2009
10.24*	ACE Limited Elective Deferred Compensation Plan (as amended and restated effective January 1, 2011)	10-Q	10.5	October 30, 2013
10.25*	Deferred Compensation Plan amendments, effective January 1, 2009	10-K	10.40	February 27, 2009
10.26*	Amendment to the ACE Limited Supplemental Retirement Plan	10-K	10.39	February 29, 2008
10.27*	Amendment and restated ACE Limited Supplemental Retirement Plan, effective January 1, 2009	10-K	10.42	February 27, 2009
10.28*	ACE USA Supplemental Employee Retirement Savings Plan	10-Q	10.6	May 15, 2000
10.29*	ACE USA Supplemental Employee Retirement Savings Plan (as amended through the Second Amendment)	10-K	10.30	March 1, 2007

97

			Incorporated by Reference
Exhibit Number	Exhibit Description	Form	Original Number	Date Filed	Filed Herewith
10.30*	ACE USA Supplemental Employee Retirement Savings Plan (as amended through the Third Amendment)	10-K	10.31	March 1, 2007
10.31*	ACE USA Supplemental Employee Retirement Savings Plan (as amended and restated)	10-K	10.46	February 27, 2009
10.32*	First Amendment to the Amended and Restated ACE USA Supplemental Employee Retirement Savings Plan	10-K	10.39	February 25, 2010
10.33*	The ACE Limited 1995 Outside Directors Plan (as amended through the Seventh Amendment)	10-Q	10.1	August 14, 2003
10.34*	ACE Limited 1998 Long-Term Incentive Plan (as amended through the Fourth Amendment)	10-K	10.34	March 1, 2007
10.35*	ACE Limited 2004 Long-Term Incentive Plan (as amended through the Fifth Amendment)	8-K	10	May 21, 2010
10.36*	ACE Limited 2004 Long-Term Incentive Plan (as amended through the Sixth Amendment)	8-K	10.1	May 20, 2013
10.37*	ACE Limited Rules of the Approved U.K. Stock Option Program	10-Q	10.2	February 13, 1998
10.38*	Form of Restricted Stock Award Terms under the ACE Limited 2004 Long-Term Incentive Plan	10-K	10.54	February 27, 2009
10.39*	Form of Restricted Stock Award Terms under the ACE Limited 2004 Long-Term Incentive Plan	10-K	10.55	February 27, 2009
10.40*	Director Restricted Stock Award Terms under the ACE Limited 2004 Long-Term Incentive Plan	10-Q	10.1	November 9, 2009
10.41*	Form of Restricted Stock Unit Award Terms under the ACE Limited 2004 Long-Term Incentive Plan	10-Q	10.1	May 8, 2008
10.42*	Form of Restricted Stock Unit Award Terms under the ACE Limited 2004 Long-Term Incentive Plan	10-Q	10.2	May 8, 2008
10.43*	Form of Restricted Stock Unit Award Terms under the ACE Limited 2004 Long-Term Incentive Plan	10-K	10.60	February 27, 2009
10.44*	Form of Restricted Stock Unit Award Terms under the ACE Limited 2004 Long-Term Incentive Plan	10-Q	10.2	October 30, 2013
10.45*	Form of Restricted Stock Unit Award Terms under the ACE Limited 2004 Long-Term Incentive Plan for Chief Executive Officer, Chief Financial Officer and the General Counsel	10-K	10.56	February 28, 2014
10.46*	Form of Incentive Stock Option Terms under the ACE Limited 2004 Long-Term Incentive Plan	8-K	10.4	September 13, 2004
10.47*	Form of Incentive Stock Option Terms under the ACE Limited 2004 Long-Term Incentive Plan	10-Q	10.4	May 8, 2008
10.48*	Form of Incentive Stock Option Terms under the ACE Limited 2004 Long-Term Incentive Plan	10-K	10.63	February 27, 2009
10.49*	Form of Incentive Stock Option Terms under the ACE Limited 2004 Long-Term Incentive Plan	10-Q	10.3	October 30, 2013

98

			Incorporated by Reference
Exhibit Number	Exhibit Description	Form	Original Number	Date Filed	Filed Herewith
10.50*	Form of Non-Qualified Stock Option Terms under the ACE Limited 2004 Long-Term Incentive Plan	8-K	10.5	September 13, 2004
10.51*	Form of Non-Qualified Stock Option Terms under the ACE Limited 2004 Long-Term Incentive Plan	10-Q	10.3	May 8, 2008
10.52*	Form of Non-Qualified Stock Option Terms under the ACE Limited 2004 Long-Term Incentive Plan	10-Q	10.4	October 30, 2013
10.53*	Form of Performance Based Restricted Stock Award Terms under the ACE Limited 2004 Long-Term Incentive Plan, as updated through May 4, 2006	10-Q	10.3	May 5, 2006
10.54*	Revised Form of Performance Based Restricted Stock Award Terms under the ACE Limited 2004 Long-Term Incentive Plan	10-Q	10.2	November 8, 2006
10.55*	Revised Form of Performance Based Restricted Stock Award Terms under The ACE Limited 2004 Long-Term Incentive Plan	10-K	10.65	February 25, 2011
10.56*	Form of Performance Based Restricted Stock Award Terms under the ACE Limited 2004 Long-Term Incentive Plan	10-K	10.67	February 28, 2014
10.57*	Form of Performance Based Restricted Stock Award Terms under the ACE Limited 2004 Long-Term Incentive Plan for Chief Executive Officer, Chief Financial Officer and the General Counsel	10-K	10.68	February 28, 2014
10.58*	Form of Restricted Stock Unit Award Terms (for outside directors) under the ACE Limited 2004 Long-Term Incentive Plan	10-Q	10.2	November 7, 2007
10.59*	Form of Restricted Stock Unit Award Terms (for outside directors) under the ACE Limited 2004 Long-Term Incentive Plan	10-Q	10.2	August 7, 2009
10.60*	Form of Incentive Stock Option Terms under the ACE Limited 2004 Long-Term Incentive Plan for Messrs. Greenberg and Cusumano	10-Q	10.1	August 4, 2011
10.61*	Form of Non-Qualified Stock Option Terms under the ACE Limited 2004 Long-Term Incentive Plan for Messrs. Greenberg and Cusumano	10-Q	10.2	August 4, 2011
10.62*	Form of Restricted Stock Award Terms under the ACE Limited 2004 Long-Term Incentive Plan for Messrs. Greenberg and Cusumano	10-Q	10.3	August 4, 2011
10.63*	ACE Limited Employee Stock Purchase Plan, as amended	8-K	10.1	May 22, 2012
10.64*	Form of Performance Based Restricted Stock Award Terms under the ACE Limited 2004 Long-Term Incentive Plan for Messrs. Greenberg and Cusumano	10-K	10.72	February 24, 2012
10.65*	Separation and Release Agreement between the Company and Robert Cusumano, dated July 24, 2013	10-Q	10.8	October 30, 2013
10.66*	Form of Restricted Stock Award Terms under the ACE Limited 2004 Long-Term Incentive Plan for Swiss Executive Management	10-K	10.68	February 27, 2015
10.67*	Form of Performance Based Restricted Stock Award Terms under the ACE Limited 2004 Long-Term Incentive Plan for Swiss Executive Management	10-K	10.69	February 27, 2015

99

			Incorporated by Reference
Exhibit Number	Exhibit Description	Form	Original Number	Date Filed	Filed Herewith
10.68*	Form of Restricted Stock Unit Award Terms under the ACE Limited 2004 Long-Term Incentive Plan for Swiss Executive Management	10-K	10.70	February 27, 2015
10.69*	Form of Incentive Stock Option Terms under the ACE Limited 2004 Long-Term Incentive Plan for Swiss Executive Management	10-K	10.71	February 27, 2015
10.70*	Form of Non-Qualified Stock Option Terms under the ACE Limited 2004 Long-Term Incentive Plan for Swiss Executive Management	10-K	10.72	February 27, 2015
10.71*	Form of Executive Management Non-Competition Agreement	8-K	10.1	May 22, 2015
10.72	Commitment Increase Agreement to increase the credit capacity under the Credit Agreement originally entered into on November 6, 2012 to $1,500,000,000 under the Senior Unsecured Letter of Credit Facility, dated as of December 11, 2015, among ACE Limited, and certain subsidiaries, and Wells Fargo Bank, National Association as Administrative Agent, the Swingline Bank and an Issuing Bank				X
10.73*	Form of Performance Based Restricted Stock Award Terms under the ACE Limited 2004 Long-Term Incentive Plan				X
10.74*	Form of Performance Based Restricted Stock Award Terms under the ACE Limited 2004 Long-Term Incentive Plan for Special Award for Messrs. Greenberg and Keogh				X
12.1	Ratio of earnings to fixed charges				X
18.1	Preferability Letter of Independent Registered Public Accounting Firm	10-Q	18.1	October 29, 2014
21.1	Subsidiaries of the Company				X
23.1	Consent of Independent Registered Public Accounting Firm				X
31.1	Certification Pursuant to Section 302 of The Sarbanes-Oxley Act of 2002				X
31.2	Certification Pursuant to Section 302 of The Sarbanes-Oxley Act of 2002				X
32.1	Certification Pursuant to 18 U.S.C. Section 1350, As Adopted Pursuant to Section 906 of The Sarbanes-Oxley Act of 2002				X
32.2	Certification Pursuant to 18 U.S.C. Section 1350, As Adopted Pursuant to Section 906 of The Sarbanes-Oxley Act of 2002				X
101	The following financial information from Chubb Limited's Annual Report on Form 10-K for the year ended December 31, 2015, formatted in XBRL: (i)  Consolidated Balance Sheets at December 31, 2015 and 2014; (ii) Consolidated Statements of Operations and Comprehensive Income for the years ended December 31, 2015, 2014, and 2013; (iii) Consolidated Statements of Shareholders' Equity for the years ended December 31, 2015, 2014, and 2013; (iv) Consolidated Statements of Cash Flows for the years ended December 31, 2015, 2014, and 2013; and (v) Notes to the Consolidated Financial Statements				X
* Management Contract or Compensation Plan

100

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

CHUBB LIMITED

By:	/s/ Philip V. Bancroft
	Philip V. Bancroft Executive Vice President and Chief Financial Officer

February 26, 2016

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

Signature	Title	Date
/s/ Evan G. Greenberg	Chairman, President, Chief Executive Officer, and Director	February 26, 2016
Evan G. Greenberg
/s/ Philip V. Bancroft	Executive Vice President and Chief Financial Officer	February 26, 2016
Philip V. Bancroft	(Principal Financial Officer)
/s/ Paul B. Medini	Chief Accounting Officer	February 26, 2016
Paul B. Medini	(Principal Accounting Officer)
/s/ Michael G. Atieh	Director	February 26, 2016
Michael G. Atieh
/s/ Sheila P. Burke	Director	February 26, 2016
Sheila P. Burke
/s/ James I. Cash, Jr.	Director	February 26, 2016
James I. Cash, Jr.
/s/ Mary A. Cirillo	Director	February 26, 2016
Mary A. Cirillo
/s/ Michael P. Connors	Director	February 26, 2016
Michael P. Connors

101

Signature	Title	Date
/s/ John A. Edwardson	Director	February 26, 2016
John A. Edwardson
/s/ Robert M. Hernandez	Director	February 26, 2016
Robert M. Hernandez
/s/ Lawrence W. Kellner	Director	February 26, 2016
Lawrence W. Kellner
/s/ Peter Menikoff	Director	February 26, 2016
Peter Menikoff
/s/ Leo F. Mullin	Director	February 26, 2016
Leo F. Mullin
/s/ Kimberly A. Ross	Director	February 26, 2016
Kimberly A. Ross
/s/ Robert W. Scully	Director	February 26, 2016
Robert W. Scully
/s/ Eugene B. Shanks, Jr.	Director	February 26, 2016
Eugene B. Shanks, Jr.
/s/ Theodore E. Shasta	Director	February 26, 2016
Theodore E. Shasta
/s/ David H. Sidwell	Director	February 26, 2016
David H. Sidwell
/s/ Olivier Steimer	Director	February 26, 2016
Olivier Steimer
/s/ James M. Zimmerman	Director	February 26, 2016
James M. Zimmerman

102

CHUBB LIMITED AND SUBSIDIARIES

CONSOLIDATED FINANCIAL STATEMENTS

DECEMBER 31, 2015

F-1

Chubb Limited

INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

		Page
Management's Responsibility for Financial Statements and Internal Control over Financial Reporting		F-3
Report of Independent Registered Public Accounting Firm		F-4
Consolidated Financial Statements
Consolidated Balance Sheets		F-5
Consolidated Statements of Operations and Comprehensive Income		F-6
Consolidated Statements of Shareholders’ Equity		F-7
Consolidated Statements of Cash Flows		F-8
Notes to Consolidated Financial Statements
Note 1.	Summary of significant accounting policies	F-9
Note 2.	Acquisitions	F-18
Note 3.	Investments	F-19
Note 4.	Fair value measurements	F-28
Note 5.	Reinsurance	F-37
Note 6.	Intangible assets	F-41
Note 7.	Unpaid losses and loss expenses	F-42
Note 8.	Taxation	F-48
Note 9.	Debt	F-51
Note 10.	Commitments, contingencies, and guarantees	F-52
Note 11.	Shareholders' equity	F-58
Note 12.	Share-based compensation	F-60
Note 13.	Pension plans	F-64
Note 14.	Other (income) expense	F-65
Note 15.	Chubb integration expenses	F-65
Note 16.	Segment information	F-65
Note 17.	Earnings per share	F-70
Note 18.	Related party transactions	F-70
Note 19.	Statutory financial information	F-71
Note 20.	Information provided in connection with outstanding debt of subsidiaries	F-72
Note 21.	Condensed unaudited quarterly financial data	F-79
Financial Statement Schedules
Schedule I	Summary of Investments - Other Than Investments in Related Parties	F-80
Schedule II	Condensed Financial Information of Registrant	F-81
Schedule IV	Supplemental Information Concerning Reinsurance	F-84
Schedule VI	Supplementary Information Concerning Property and Casualty Operations	F-85

F-2

MANAGEMENT'S RESPONSIBILITY FOR FINANCIAL STATEMENTS AND

INTERNAL CONTROL OVER FINANCIAL REPORTING

Financial Statements

The consolidated financial statements of Chubb Limited (Chubb) were prepared by management, which is responsible for their reliability and objectivity. The statements have been prepared in conformity with accounting principles generally accepted in the United States of America and, as such, include amounts based on informed estimates and judgments of management. Financial information elsewhere in this annual report is consistent with that in the consolidated financial statements.

The Board of Directors (Board), operating through its Audit Committee, which is composed entirely of directors who are not officers or employees of Chubb, provides oversight of the financial reporting process and safeguarding of assets against unauthorized acquisition, use or disposition. The Audit Committee annually recommends the appointment of an independent registered public accounting firm and submits its recommendation to the Board for approval.

The Audit Committee meets with management, the independent registered public accountants and the internal auditor; approves the overall scope of audit work and related fee arrangements; and reviews audit reports and findings. In addition, the independent registered public accountants and the internal auditor meet separately with the Audit Committee, without management representatives present, to discuss the results of their audits; the adequacy of Chubb's internal control; the quality of its financial reporting; and the safeguarding of assets against unauthorized acquisition, use or disposition.

The consolidated financial statements have been audited by an independent registered public accounting firm, PricewaterhouseCoopers LLP, which has been given unrestricted access to all financial records and related data, including minutes of all meetings of the Board and committees of the Board. Chubb believes that all representations made to our independent registered public accountants during their audits were valid and appropriate.

Internal Control over Financial Reporting

The management of Chubb is responsible for establishing and maintaining adequate internal control over financial reporting. Pursuant to the rules and regulations of the Securities and Exchange Commission, internal control over financial reporting is a process designed by, or under the supervision of our Chief Executive Officer and Chief Financial Officer to provide reasonable assurance regarding the reliability of financial reporting and the preparation of our consolidated financial statements for external purposes in accordance with accounting principles generally accepted in the United States of America.

As of December 31, 2015, management has evaluated the effectiveness of Chubb's internal control over financial reporting based on the criteria for effective internal control over financial reporting established in “Internal Control - Integrated Framework,” issued by the Committee of Sponsoring Organizations of the Treadway Commission in 2013. Based on this evaluation, we have concluded that Chubb's internal control over financial reporting was effective as of December 31, 2015.

PricewaterhouseCoopers LLP, the independent registered public accounting firm that audited the consolidated financial statements of Chubb included in this Annual Report, has issued a report on the effectiveness of Chubb's internal controls over financial reporting as of December 31, 2015. The report, which expresses an unqualified opinion on the effectiveness of Chubb's internal control over financial reporting as of December 31, 2015, is included in this Item under “Report of Independent Registered Public Accounting Firm” and follows this statement.

/s/ Evan G. Greenberg	/s/ Philip V. Bancroft
Evan G. Greenberg	Philip V. Bancroft
Chairman, President and Chief Executive Officer	Executive Vice President and Chief Financial Officer

F-3

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Shareholders of Chubb Limited:

In our opinion, the accompanying consolidated balance sheets and the related consolidated statements of operations and comprehensive income, shareholders' equity, and cash flows present fairly, in all material respects, the financial position of Chubb Limited and its subsidiaries (the "Company") at December 31, 2015 and December 31, 2014, and the results of their operations and their cash flows for each of the three years in the period ended December 31, 2015 in conformity with accounting principles generally accepted in the United States of America. In addition, in our opinion, the financial statement schedules listed in the index appearing under Item 15 (2) present fairly, in all material respects, the information set forth therein when read in conjunction with the related consolidated financial statements. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2015, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). The Company's management is responsible for these financial statements and financial statement schedules, for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting included in Internal Control Over Financial Reporting, appearing in Management's Responsibility for Financial Statements and Internal Control Over Financial Reporting. Our responsibility is to express opinions on these financial statements, on the financial statement schedules, and on the Company's internal control over financial reporting based on our integrated audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement and whether effective internal control over financial reporting was maintained in all material respects. Our audits of the financial statements included examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP

Philadelphia, Pennsylvania

February 26, 2016

F-4

CONSOLIDATED BALANCE SHEETS

Chubb Limited and Subsidiaries

			December 31			December 31
(in millions of U.S. dollars, except share and per share data)			2015			2014
Assets
Investments
	Fixed maturities available for sale, at fair value (amortized cost – $43,149 and $47,826)		$	43,587		$	49,395
	(includes hybrid financial instruments of $31 and $274)
	Fixed maturities held to maturity, at amortized cost (fair value – $8,552 and $7,589)		8,430			7,331
	Equity securities, at fair value (cost – $441 and $440)		497			510
	Short-term investments, at fair value and amortized cost		10,446			2,322
	Other investments (cost – $2,993 and $2,999)		3,291			3,346
		Total investments	66,251			62,904
Cash			1,775			655
Securities lending collateral			1,046			1,330
Accrued investment income			513			552
Insurance and reinsurance balances receivable			5,323			5,426
Reinsurance recoverable on losses and loss expenses			11,386			11,992
Reinsurance recoverable on policy benefits			187			217
Deferred policy acquisition costs			2,873			2,601
Value of business acquired			395			466
Goodwill and other intangible assets			5,683			5,724
Prepaid reinsurance premiums			2,082			2,026
Deferred tax assets			318			295
Investments in partially-owned insurance companies			653			504
Other assets			3,881			3,556
Total assets			$	102,366		$	98,248
Liabilities
Unpaid losses and loss expenses			$	37,303		$	38,315
Unearned premiums			8,439			8,222
Future policy benefits			4,807			4,754
Insurance and reinsurance balances payable			4,270			4,095
Securities lending payable			1,047			1,331
Accounts payable, accrued expenses, and other liabilities			6,205			5,726
Repurchase agreements			1,404			1,402
Short-term debt			—			1,150
Long-term debt			9,447			3,357
Trust preferred securities			309			309
Total liabilities			73,231			68,661
Commitments and contingencies
Shareholders’ equity
Common Shares (CHF 24.15 and CHF 24.77 par value; 342,832,412 shares issued; 324,563,441 and 328,659,686 shares outstanding)			7,833			8,055
Common Shares in treasury (18,268,971 and 14,172,726 shares)			(1,922		)	(1,448		)
Additional paid-in capital			4,481			5,145
Retained earnings			19,478			16,644
Accumulated other comprehensive income (AOCI)			(735		)	1,191
Total shareholders’ equity			29,135			29,587
Total liabilities and shareholders’ equity			$	102,366		$	98,248

See accompanying notes to the consolidated financial statements

F-5

CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME

Chubb Limited and Subsidiaries

For the years ended December 31, 2015, 2014 and 2013
(in millions of U.S. dollars, except per share data)	2015			2014			2013
Revenues
Net premiums written	$	17,713		$	17,799		$	17,025
Increase in unearned premiums	(500		)	(373		)	(412		)
Net premiums earned	17,213			17,426			16,613
Net investment income	2,194			2,252			2,144
Net realized gains (losses):
Other-than-temporary impairment (OTTI) losses gross	(151		)	(75		)	(22		)
Portion of OTTI losses recognized in other comprehensive income (OCI)	39			7			—
Net OTTI losses recognized in income	(112		)	(68		)	(22		)
Net realized gains (losses) excluding OTTI losses	(308		)	(439		)	526
Total net realized gains (losses) (includes $(151), $(24), and $105 reclassified from AOCI)	(420		)	(507		)	504
Total revenues	18,987			19,171			19,261
Expenses
Losses and loss expenses	9,484			9,649			9,348
Policy benefits	543			517			515
Policy acquisition costs	2,941			3,075			2,659
Administrative expenses	2,270			2,245			2,211
Interest expense	300			280			275
Other (income) expense	(51		)	(190		)	(80		)
Amortization of intangible assets	171			108			95
Chubb integration expenses	33			—			—
Total expenses	15,691			15,684			15,023
Income before income tax	3,296			3,487			4,238
Income tax expense (includes $(2), $9, and $17 on reclassified unrealized gains and losses)	462			634			480
Net income	$	2,834		$	2,853		$	3,758
Other comprehensive income (loss)
Unrealized appreciation (depreciation)	$	(1,280	)	$	820		$	(1,762	)
Reclassification adjustment for net realized (gains) losses included in net income	151			24			(105		)
	(1,129		)	844			(1,867		)
Change in:
Cumulative translation adjustment	(958		)	(632		)	(339		)
Pension liability	15			2			—
Other comprehensive income (loss), before income tax	(2,072		)	214			(2,206		)
Income tax benefit (expense) related to OCI items	146			(175		)	471
Other comprehensive income (loss)	(1,926		)	39			(1,735		)
Comprehensive income	$	908		$	2,892		$	2,023
Earnings per share
Basic earnings per share	$	8.71		$	8.50		$	11.02
Diluted earnings per share	$	8.62		$	8.42		$	10.92

See accompanying notes to the consolidated financial statements

F-6

CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY

Chubb Limited and Subsidiaries

For the years ended December 31, 2015, 2014 and 2013
(in millions of U.S. dollars)	2015			2014			2013
Common Shares
Balance – beginning of year	$	8,055		$	8,899		$	9,591
Dividends declared on Common Shares – par value reduction	(222		)	(844		)	(692		)
Balance – end of year	7,833			8,055			8,899
Common Shares in treasury
Balance – beginning of year	(1,448		)	(255		)	(159		)
Common Shares repurchased	(734		)	(1,449		)	(290		)
Net shares redeemed under employee share-based compensation plans	260			256			194
Balance – end of year	(1,922		)	(1,448		)	(255		)
Additional paid-in capital
Balance – beginning of year	5,145			5,238			5,179
Net shares redeemed under employee share-based compensation plans	(160		)	(167		)	(126		)
Exercise of stock options	(61		)	(58		)	(42		)
Share-based compensation expense and other	184			185			191
Funding of dividends declared to Retained earnings	(653		)	(81		)	—
Tax benefit on share-based compensation expense	26			28			36
Balance – end of year	4,481			5,145			5,238
Retained earnings
Balance – beginning of year	16,644			13,791			10,033
Net income	2,834			2,853			3,758
Funding of dividends declared from Additional paid-in capital	653			81			—
Dividends declared on Common Shares	(653		)	(81		)	—
Balance – end of year	19,478			16,644			13,791
Accumulated other comprehensive income (loss)
Net unrealized appreciation on investments
Balance – beginning of year	1,851			1,174			2,633
Change in year, before reclassification from AOCI, net of income tax benefit (expense) of $154, $(176) and $391	(1,126		)	644			(1,371		)
Amounts reclassified from AOCI, net of income tax benefit (expense) of $(2), $9 and $17	149			33			(88		)
Change in year, net of income tax benefit (expense) of $152, $(167), and $408	(977		)	677			(1,459		)
Balance – end of year	874			1,851			1,174
Cumulative translation adjustment
Balance – beginning of year	(581		)	63			339
Change in year, net of income tax benefit (expense) of nil, $(12), and $63	(958		)	(644		)	(276		)
Balance – end of year	(1,539		)	(581		)	63
Pension liability adjustment
Balance – beginning of year	(79		)	(85		)	(85		)
Change in year, net of income tax benefit (expense) of $(6), $4, and nil	9			6			—
Balance – end of year	(70		)	(79		)	(85		)
Accumulated other comprehensive income (loss)	(735		)	1,191			1,152
Total shareholders’ equity	$	29,135		$	29,587		$	28,825

See accompanying notes to the consolidated financial statements

F-7

CONSOLIDATED STATEMENTS OF CASH FLOWS

Chubb Limited and Subsidiaries

For the years ended December 31, 2015, 2014, and 2013
(in millions of U.S. dollars)	2015			2014			2013
Cash flows from operating activities
Net income	$	2,834		$	2,853		$	3,758
Adjustments to reconcile net income to net cash flows from operating activities
Net realized (gains) losses	420			507			(504		)
Amortization of premiums/discounts on fixed maturities	158			188			268
Deferred income taxes	113			145			240
Unpaid losses and loss expenses	(375		)	317			(365		)
Unearned premiums	335			441			402
Future policy benefits	216			236			191
Insurance and reinsurance balances payable	268			376			176
Accounts payable, accrued expenses, and other liabilities	179			13			37
Income taxes payable	(148		)	103			(45		)
Insurance and reinsurance balances receivable	(53		)	(469		)	(624		)
Reinsurance recoverable on losses and loss expenses	218			119			787
Reinsurance recoverable on policy benefits	33			4			23
Deferred policy acquisition costs	(435		)	(397		)	(503		)
Prepaid reinsurance premiums	(212		)	(89		)	(31		)
Other	313			149			212
Net cash flows from operating activities	3,864			4,496			4,022
Cash flows from investing activities
Purchases of fixed maturities available for sale	(16,040		)	(15,553		)	(21,340		)
Purchases of to be announced mortgage-backed securities	(31		)	—			(58		)
Purchases of fixed maturities held to maturity	(62		)	(267		)	(447		)
Purchases of equity securities	(158		)	(251		)	(264		)
Sales of fixed maturities available for sale	10,783			7,482			10,355
Sales of to be announced mortgage-backed securities	31			—			58
Sales of equity securities	183			670			142
Maturities and redemptions of fixed maturities available for sale	6,567			6,413			6,941
Maturities and redemptions of fixed maturities held to maturity	669			875			1,488
Net change in short-term investments	(8,216		)	(603		)	524
Net derivative instruments settlements	(21		)	(230		)	(471		)
Acquisition of subsidiaries (net of cash acquired of $629, $20, and $38)	264			(766		)	(977		)
Other	(263		)	(274		)	(393		)
Net cash flows used for investing activities	(6,294		)	(2,504		)	(4,442		)
Cash flows from financing activities
Dividends paid on Common Shares	(862		)	(862		)	(517		)
Common Shares repurchased	(758		)	(1,429		)	(287		)
Proceeds from issuance of long-term debt	6,090			699			947
Proceeds from issuance of repurchase agreements	2,029			1,978			2,572
Repayment of long-term debt	(1,150		)	(501		)	—
Repayment of repurchase agreements	(2,027		)	(1,977		)	(2,572		)
Proceeds from share-based compensation plans, including windfall tax benefits	131			127			135
Policyholder contract deposits	503			366			233
Policyholder contract withdrawals	(221		)	(172		)	(120		)
Other	(40		)	(6		)	—
Net cash flows (used for) from financing activities	3,695			(1,777		)	391
Effect of foreign currency rate changes on cash and cash equivalents	(145		)	(139		)	(7		)
Net increase (decrease) in cash	1,120			76			(36		)
Cash – beginning of year	655			579			615
Cash – end of year	$	1,775		$	655		$	579
Supplemental cash flow information
Taxes paid	$	469		$	349		$	218
Interest paid	$	259		$	264		$	253

See accompanying notes to the consolidated financial statements

F-8

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Chubb Limited and Subsidiaries

1. Summary of significant accounting policies

a) Basis of presentation

On January 14, 2016, we completed the acquisition of The Chubb Corporation, creating a global leader in property and casualty insurance. We have changed our name from ACE Limited to Chubb Limited and plan to adopt the Chubb name globally. All references to Chubb Limited throughout this Form 10-K refer to legacy ACE Limited, unless otherwise indicated. The financial condition and results presented herein are those of legacy ACE Limited and its subsidiaries and do not include the results of legacy Chubb Corporation and its subsidiaries.

Chubb Limited is a holding company incorporated in Zurich, Switzerland. Chubb Limited, through its subsidiaries, provides a broad range of insurance and reinsurance products to insureds worldwide. Through December 31, 2015 Chubb operated through five business segments: Insurance – North American P&C, Insurance – North American Agriculture, Insurance – Overseas General, Global Reinsurance, and Life. Refer to Note 16 for additional information.

The accompanying consolidated financial statements, which include the accounts of Chubb Limited and its subsidiaries (collectively, Chubb, we, us, or our), have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) and, in the opinion of management, reflect all adjustments (consisting of normally recurring accruals) necessary for a fair statement of the results and financial position for such periods. All significant intercompany accounts and transactions, including internal reinsurance transactions, have been eliminated.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Amounts included in the consolidated financial statements reflect our best estimates and assumptions; actual amounts could differ materially from these estimates. Chubb's principal estimates include:

• unpaid loss and loss expense reserves, including long-tail asbestos and environmental (A&E) reserves;

• future policy benefits reserves;

• the valuation of value of business acquired (VOBA) and amortization of deferred policy acquisition costs and VOBA;

• reinsurance recoverable, including a provision for uncollectible reinsurance;

• the assessment of risk transfer for certain structured insurance and reinsurance contracts;

• the valuation of the investment portfolio and assessment of OTTI;

• the valuation of deferred tax assets;

• the valuation of derivative instruments related to guaranteed living benefits (GLB); and

• the assessment of goodwill for impairment.

Effective 2015, amortization of intangible assets are excluded from Other (income) expense and disclosed separately in the consolidated statements of operations. In addition, repurchase agreements, previously included within short-term debt, are now separately disclosed in the consolidated balance sheets. Prior year amounts have been reclassified to conform to the current year presentation.

We also added a new expense caption (Chubb integration expenses) on the consolidated statements of operations which includes legal and professional fees and all other external costs directly related to the integration activities of the Chubb acquisition.

b) Premiums

Premiums are generally recorded as written upon inception of the policy. For multi-year policies for which premiums written are payable in annual installments, only the current annual premium is included as written at policy inception due to the ability of the insured/reinsured to commute or cancel coverage within the policy term. The remaining annual premiums are recorded as written at each successive anniversary date within the multi-year term.

F-9

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

For property and casualty (P&C) insurance and reinsurance products, premiums written are primarily earned on a pro-rata basis over the policy terms to which they relate. Unearned premiums represent the portion of premiums written applicable to the unexpired portion of the policies in force. For retrospectively-rated policies, written premiums are adjusted to reflect expected ultimate premiums consistent with changes to incurred losses, or other measures of exposure as stated in the policy, and earned over the policy coverage period. For retrospectively-rated multi-year policies, premiums recognized in the current period are computed, using a with-and-without method, as the difference between the ceding enterprise's total contract costs before and after the experience under the contract at the reporting date. Accordingly, for retrospectively-rated multi-year policies, additional premiums are generally written and earned when losses are incurred.

Mandatory reinstatement premiums assessed on reinsurance policies are earned in the period of the loss event that gave rise to the reinstatement premiums.  All remaining unearned premiums are recognized over the remaining coverage period. 

Premiums from long-duration contracts such as certain traditional term life, whole life, endowment, and long-duration personal accident and health (A&H) policies are generally recognized as revenue when due from policyholders. Traditional life policies include those contracts with fixed and guaranteed premiums and benefits. Benefits and expenses are matched with income to result in the recognition of profit over the life of the contracts.

Retroactive loss portfolio transfer (LPT) contracts in which the insured loss events occurred prior to contract inception are evaluated to determine whether they meet criteria for reinsurance accounting. If reinsurance accounting is appropriate, written premiums are fully earned and corresponding losses and loss expenses recognized at contract inception. These contracts can cause significant variances in gross premiums written, net premiums written, net premiums earned, and net incurred losses in the years in which they are written. Reinsurance contracts sold not meeting criteria for reinsurance accounting are recorded using the deposit method as described below in Note 1 k).

Reinsurance premiums assumed are based on information provided by ceding companies supplemented by our own estimates of premium when we have not received ceding company reports. Estimates are reviewed and adjustments are recorded in the period in which they are determined. Premiums are earned over the coverage terms of the related reinsurance contracts and range from one to three years.

c) Deferred policy acquisition costs and value of business acquired

Policy acquisition costs consist of commissions (direct and ceded), premium taxes, and certain underwriting costs related directly to the successful acquisition of new or renewal insurance contracts. A VOBA intangible asset is established upon the acquisition of blocks of long-duration contracts in a business combination and represents the present value of estimated net cash flows for the contracts in force at the acquisition date. Acquisition costs and VOBA, collectively policy acquisition costs, are deferred and amortized. Amortization is recorded in Policy acquisition costs in the consolidated statements of operations. Policy acquisition costs on P&C contracts are generally amortized ratably over the period in which premiums are earned. Policy acquisition costs on traditional long-duration contracts are amortized over the estimated life of the contracts, generally in proportion to premium revenue recognized based upon the same assumptions used in estimating the liability for future policy benefits. For non-traditional long-duration contracts, we amortize policy acquisition costs over the expected life of the contracts in proportion to expected gross profits.  The effect of changes in estimates of expected gross profits is reflected in the period the estimates are revised. Policy acquisition costs are reviewed to determine if they are recoverable from future income, including investment income. Unrecoverable policy acquisition costs are expensed in the period identified.

Advertising costs are expensed as incurred except for direct-response campaigns that qualify for cost deferral, principally related to long-duration A&H business produced by the Insurance – Overseas General segment, which are deferred and recognized as a component of Policy acquisition costs. For individual direct-response marketing campaigns that we can demonstrate have specifically resulted in incremental sales to customers and such sales have probable future economic benefits, incremental costs directly related to the marketing campaigns are capitalized as Deferred policy acquisition costs. Deferred policy acquisition costs, including deferred marketing costs, are reviewed regularly for recoverability from future income, including investment income, and amortized in proportion to premium revenue recognized, primarily over a ten-year period, the expected economic future benefit period based upon the same assumptions used in estimating the liability for future policy benefits. The expected future benefit period is evaluated periodically based on historical results and adjusted prospectively. The amount of deferred marketing costs reported in Deferred policy acquisition costs in the consolidated balance sheets was $250 million and $288 million at December 31, 2015 and 2014, respectively. Amortization expense for deferred marketing costs was $78 million, $99 million, and $128 million for the years ended December 31, 2015, 2014, and 2013, respectively.

F-10

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

d) Reinsurance

Chubb assumes and cedes reinsurance with other insurance companies to provide greater diversification of business and minimize the net loss potential arising from large risks. Ceded reinsurance contracts do not relieve Chubb of its primary obligation to policyholders.

For both ceded and assumed reinsurance, risk transfer requirements must be met in order to account for a contract as reinsurance, principally resulting in the recognition of cash flows under the contract as premiums and losses. To meet risk transfer requirements, a reinsurance contract must include insurance risk, consisting of both underwriting and timing risk, and a reasonable possibility of a significant loss for the assuming entity. To assess risk transfer for certain contracts, Chubb generally develops expected discounted cash flow analyses at contract inception. Deposit accounting is used for contracts that do not meet risk transfer requirements. Deposit accounting requires that consideration received or paid be recorded in the balance sheet as opposed to recording premiums written or losses incurred in the statement of operations. Non-refundable fees on deposit contracts are earned based on the terms of the contract described below in Note 1 k).

Reinsurance recoverable includes balances due from reinsurance companies for paid and unpaid losses and loss expenses and policy benefits that will be recovered from reinsurers, based on contracts in force. The method for determining the reinsurance recoverable on unpaid losses and loss expenses incurred but not reported (IBNR) involves actuarial estimates consistent with those used to establish the associated liability for unpaid losses and loss expenses as well as a determination of Chubb's ability to cede unpaid losses and loss expenses under the terms of the reinsurance agreement.

Reinsurance recoverable is presented net of a provision for uncollectible reinsurance determined based upon a review of the financial condition of reinsurers and other factors. The provision for uncollectible reinsurance is based on an estimate of the reinsurance recoverable balance that will ultimately be unrecoverable due to reinsurer insolvency, a contractual dispute, or any other reason. The valuation of this provision includes several judgments including certain aspects of the allocation of reinsurance recoverable on IBNR claims by reinsurer and a default analysis to estimate uncollectible reinsurance. The primary components of the default analysis are reinsurance recoverable balances by reinsurer, net of collateral, and default factors used to determine the portion of a reinsurer's balance deemed uncollectible. The definition of collateral for this purpose requires some judgment and is generally limited to assets held in a Chubb-only beneficiary trust, letters of credit, and liabilities held with the same legal entity for which Chubb believes there is a contractual right of offset. The determination of the default factor is principally based on the financial strength rating of the reinsurer. Default factors require considerable judgment and are determined using the current financial strength rating, or rating equivalent, of each reinsurer as well as other key considerations and assumptions. The more significant considerations include, but are not necessarily limited to, the following:

• For reinsurers that maintain a financial strength rating from a major rating agency, and for which recoverable balances are considered representative of the larger population (i.e., default probabilities are consistent with similarly rated reinsurers and payment durations conform to averages), the financial rating is based on a published source and the default factor is based on published default statistics of a major rating agency applicable to the reinsurer's particular rating class. When a recoverable is expected to be paid in a brief period of time by a highly rated reinsurer, such as certain property catastrophe claims, a default factor may not be applied;

• For balances recoverable from reinsurers that are both unrated by a major rating agency and for which management is unable to determine a credible rating equivalent based on a parent, affiliate, or peer company, we determine a rating equivalent based on an analysis of the reinsurer that considers an assessment of the creditworthiness of the particular entity, industry benchmarks, or other factors as considered appropriate. We then apply the applicable default factor for that rating class. For balances recoverable from unrated reinsurers for which the ceded reserve is below a certain threshold, we generally apply a default factor of 34 percent, consistent with published statistics of a major rating agency;

• For balances recoverable from reinsurers that are either insolvent or under regulatory supervision, we establish a default factor and resulting provision for uncollectible reinsurance based on reinsurer-specific facts and circumstances. Upon initial notification of an insolvency, we generally recognize an expense for a substantial portion of all balances outstanding, net of collateral, through a combination of write-offs of recoverable balances and increases to the provision for uncollectible reinsurance. When regulatory action is taken on a reinsurer, we generally recognize a default factor by estimating an expected recovery on all balances outstanding, net of collateral. When sufficient credible information becomes available, we adjust the provision for uncollectible reinsurance by establishing a default factor pursuant to information received; and

• For other recoverables, management determines the provision for uncollectible reinsurance based on the specific facts and circumstances.

F-11

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

The methods used to determine the reinsurance recoverable balance and related provision for uncollectible reinsurance are regularly reviewed and updated, and any resulting adjustments are reflected in earnings in the period identified.

Prepaid reinsurance premiums represent the portion of premiums ceded to reinsurers applicable to the unexpired coverage terms of the reinsurance contracts in force.

The value of reinsurance business assumed of $21 million and $26 million at December 31, 2015 and 2014, respectively, included in Other assets in the accompanying consolidated balance sheets, represents the excess of estimated ultimate value of the liabilities assumed under retroactive reinsurance contracts over consideration received. The value of reinsurance business assumed is amortized and recorded to losses and loss expenses based on the payment pattern of the losses assumed and ranges between 9 and 40 years. The unamortized value is reviewed regularly to determine if it is recoverable based upon the terms of the contract, estimated losses and loss expenses, and anticipated investment income. Unrecoverable amounts are expensed in the period identified.

e) Investments

Fixed maturities are classified as either available for sale or held to maturity. The available for sale portfolio is reported at fair value. The held to maturity portfolio includes securities for which we have the ability and intent to hold to maturity or redemption and is reported at amortized cost. Equity securities are classified as available for sale and are recorded at fair value. Short-term investments comprise securities due to mature within one year of the date of purchase and are recorded at fair value which typically approximates cost. Short-term investments include certain cash and cash equivalents, which are part of investment portfolios under the management of external investment managers.

Other investments principally comprise life insurance policies, policy loans, trading securities, other direct equity investments, investment funds, and limited partnerships.

• Life insurance policies are carried at policy cash surrender value and income is recorded in other income (expense).

• Policy loans are carried at outstanding balance and interest income is recorded to net investment income.

• Trading securities are recorded on a trade date basis and carried at fair value. Unrealized gains and losses on trading securities are reflected in Other (income) expense.

• Other investments over which Chubb can exercise significant influence are accounted for using the equity method and income is recorded in Other (income) expense.

• All other investments over which Chubb cannot exercise significant influence are carried at fair value with changes in fair value recognized through OCI. For these investments, investment income is recognized in net investment income and realized gains are recognized as related distributions are received.

• Partially-owned investment companies comprise entities in which we hold an ownership interest in excess of three percent. These investments as well as Chubb's investments in investment funds where our ownership interest is in excess of three percent are accounted for under the equity method because Chubb exerts significant influence. These investments apply investment company accounting to determine operating results, and Chubb retains the investment company accounting in applying the equity method. This means that investment income, realized gains or losses, and unrealized gains or losses are included in the portion of equity earnings reflected in Other (income) expense.

Investments in partially-owned insurance companies primarily represent direct investments in which Chubb has significant influence and, as such, meet the requirements for equity accounting. We report our share of the net income or loss of the partially-owned insurance companies in Other (income) expense.

Realized gains or losses on sales of investments are determined on a first-in, first-out basis. Unrealized appreciation (depreciation) on investments is included as a separate component of AOCI in Shareholders' equity. We regularly review our investments for OTTI. Refer to Note 3 for additional information.

With respect to securities where the decline in value is determined to be temporary and the security's value is not written down, a subsequent decision may be made to sell that security and realize a loss. Subsequent decisions on security sales are the result of changing or unforeseen facts and circumstances (i.e., arising from a large insured loss such as a catastrophe), deterioration of the creditworthiness of the issuer or its industry, or changes in regulatory requirements. We believe that subsequent decisions to sell such securities are consistent with the classification of the majority of the portfolio as available for sale.

F-12

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

We use derivative instruments including futures, options, swaps, and foreign currency forward contracts for the purpose of managing certain investment portfolio risks and exposures. Refer to Note 10 for additional information. Derivatives are reported at fair value and are recorded in the accompanying consolidated balance sheets in either Accounts payable, accrued expenses, and other liabilities or Other assets with changes in fair value included in Net realized gains (losses) in the consolidated statements of operations. Collateral held by brokers equal to a percentage of the total value of open futures contracts is included in the investment portfolio.

Net investment income includes interest and dividend income and amortization of fixed maturity market premiums and discounts and is net of investment management and custody fees. For mortgage-backed securities, and any other holdings for which there is a prepayment risk, prepayment assumptions are evaluated and revised as necessary. Any adjustments required due to the resultant change in effective yields and maturities are recognized prospectively. Prepayment fees or call premiums that are only payable when a security is called prior to its maturity are earned when received and reflected in Net investment income. 

Chubb participates in a securities lending program operated by a third-party banking institution whereby certain assets are loaned to qualified borrowers and from which we earn an incremental return. Borrowers provide collateral, in the form of either cash or approved securities, of 102 percent of the fair value of the loaned securities.  Each security loan is deemed to be an overnight transaction.  Cash collateral is invested in a collateral pool which is managed by the banking institution.  The collateral pool is subject to written investment guidelines with key objectives which include the safeguard of principal and adequate liquidity to meet anticipated redemptions. The fair value of the loaned securities is monitored on a daily basis, with additional collateral obtained or refunded as the fair value of the loaned securities changes. The collateral is held by the third-party banking institution, and the collateral can only be accessed in the event that the institution borrowing the securities is in default under the lending agreement. As a result of these restrictions, we consider our securities lending activities to be non-cash investing and financing activities. An indemnification agreement with the lending agent protects us in the event a borrower becomes insolvent or fails to return any of the securities on loan. The fair value of the securities on loan is included in fixed maturities and equity securities. The securities lending collateral is reported as a separate line in total assets with a related liability reflecting our obligation to return the collateral plus interest.

Similar to securities lending arrangements, securities sold under repurchase agreements, whereby Chubb sells securities and repurchases them at a future date for a predetermined price, are accounted for as collateralized investments and borrowings and are recorded at the contractual repurchase amounts plus accrued interest. Assets to be repurchased are the same, or substantially the same, as the assets transferred and the transferor, through right of substitution, maintains the right and ability to redeem the collateral on short notice. The fair value of the underlying securities is included in fixed maturities and equity securities. In contrast to securities lending programs, the use of cash received is not restricted. We report the obligation to return the cash as Repurchase agreements in the consolidated balance sheets.

Refer to Note 4 for a discussion on the determination of fair value for Chubb's various investment securities.

f) Cash

Cash includes cash on hand and deposits with an original maturity of three months or less at time of purchase. Cash held by external money managers is included in Short-term investments.

We have agreements with a third-party bank provider which implemented two international multi-currency notional cash pooling programs. In each program, participating Chubb entities establish deposit accounts in different currencies with the bank provider and each day the credit or debit balances in every account are notionally translated into a single currency (U.S. dollars) and then notionally pooled. The bank extends overdraft credit to any participating Chubb entity as needed, provided that the overall notionally-pooled balance of all accounts in each pool at the end of each day is at least zero. Actual cash balances are not physically converted and are not commingled between legal entities. Any overdraft balances incurred under this program by a Chubb entity would be guaranteed by Chubb Limited (up to $300 million in the aggregate). Our syndicated letter of credit facility allows for same day drawings to fund a net pool overdraft should participating Chubb entities overdraw contributed funds from the pool.

g) Goodwill and other intangible assets

Goodwill represents the excess of the cost of acquisitions over the fair value of net assets acquired and is not amortized. Goodwill is assigned at acquisition to the applicable reporting unit of the acquired entities giving rise to the goodwill. Goodwill impairment tests are performed annually or more frequently if circumstances indicate a possible impairment.  For goodwill

F-13

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

impairment testing, we use a qualitative assessment to determine whether it is more likely than not (i.e., more than a 50 percent probability) that the fair value of a reporting unit is greater than its carrying amount. If our assessment indicates less than a 50 percent probability that fair value exceeds carrying value, we quantitatively estimate a reporting unit's fair value. Goodwill recorded in connection with investments in partially-owned insurance companies is recorded in Investments in partially-owned insurance companies and is also measured for impairment annually.

Indefinite lived intangible assets are not subject to amortization. Finite lived intangible assets are amortized over their useful lives, generally ranging from 1 to 30 years. Intangible assets are regularly reviewed for indicators of impairment. Impairment is recognized if the carrying amount is not recoverable from its undiscounted cash flows and is measured as the difference between the carrying amount and fair value.

h) Unpaid losses and loss expenses

A liability is established for the estimated unpaid losses and loss expenses under the terms of, and with respect to, Chubb's policies and agreements. Similar to premiums that are recognized as revenues over the coverage period of the policy, a liability for unpaid losses and loss expenses is recognized as expense when insured events occur over the coverage period of the policy. This liability includes a provision for both reported claims (case reserves) and incurred but not reported claims (IBNR reserves). IBNR reserve estimates are generally calculated by first projecting the ultimate cost of all losses that have occurred (expected losses), and then subtracting paid losses, case reserves, and loss expenses. The methods of determining such estimates and establishing the resulting liability are reviewed regularly and any adjustments are reflected in operations in the period in which they become known. Future developments may result in losses and loss expenses materially greater or less than recorded amounts.

Except for net loss and loss expense reserves of $42 million net of discount, held at December 31, 2015, representing certain structured settlements for which the timing and amount of future claim payments are reliably determinable and $50 million, net of discount, of certain reserves for unsettled claims that are discounted in statutory filings, Chubb does not discount its P&C loss reserves. This compares with reserves of $49 million for certain structured settlements and $62 million of certain reserves for unsettled claims at December 31, 2014. Structured settlements represent contracts purchased from life insurance companies primarily to settle workers' compensation claims, where payments to the claimant by the life insurance company are expected to be made in the form of an annuity. Chubb retains the liability to the claimant in the event that the life insurance company fails to pay. At December 31, 2015, the gross liability due to claimants was $588 million, net of discount, and reinsurance recoverables due from the life insurance companies was $546 million, net of discount. For structured settlement contracts where payments are guaranteed regardless of claimant life expectancy, the amounts recoverable from the life insurance companies at December 31, 2015 are included in Other assets in the consolidated balance sheets, as they do not meet the requirements for reinsurance accounting.

Included in Unpaid losses and loss expenses are liabilities for asbestos and environmental (A&E) claims and expenses. These unpaid losses and loss expenses are principally related to claims arising from remediation costs associated with hazardous waste sites and bodily-injury claims related to asbestos products and environmental hazards. The estimation of these liabilities is particularly sensitive to changes in the legal environment including specific settlements that may be used as precedents to settle future claims. However, Chubb does not anticipate future changes in laws and regulations in setting its A&E reserve levels.

Prior period development arises from changes to loss estimates recognized in the current year that relate to loss reserves first reported in previous calendar years and excludes the effect of losses from the development of earned premiums from previous accident years.

For purposes of analysis and disclosure, management views prior period development to be changes in the nominal value of loss estimates from period to period, net of premium and profit commission adjustments on loss sensitive contracts. Prior period development generally excludes changes in loss estimates that do not arise from the emergence of claims, such as those related to uncollectible reinsurance, interest, unallocated loss adjustment expenses, or foreign currency. Accordingly, specific items excluded from prior period development include the following: gains/losses related to foreign currency remeasurement; losses recognized from the early termination or commutation of reinsurance agreements that principally relate to the time value of money; changes in the value of reinsurance business assumed reflected in losses incurred but principally related to the time value of money; and losses that arise from changes in estimates of earned premiums from prior accident years. Except for foreign currency remeasurement, which is included in Net realized gains (losses), these items are included in current year losses.

F-14

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

i) Future policy benefits

The valuation of long-duration contract reserves requires management to make estimates and assumptions regarding expenses, mortality, persistency, and investment yields. Estimates are primarily based on historical experience and information provided by ceding companies and include a margin for adverse deviation. Interest rates used in calculating reserves range from less than 1.0 percent to 7.2 percent and less than 1.0 percent to 6.5 percent at December 31, 2015 and 2014, respectively. Actual results could differ materially from these estimates. Management monitors actual experience and where circumstances warrant, will revise assumptions and the related reserve estimates. Revisions are recorded in the period they are determined.

Certain of our long-duration contracts are supported by assets that do not qualify for separate account reporting under GAAP. These assets are classified as trading securities and reported in Other investments and the offsetting liabilities are reported in Future policy benefits in the consolidated balance sheets. Changes in the fair value of separate account assets that do not qualify for separate account reporting under GAAP are reported in Other income (expense) and the offsetting movements in the liabilities are included in Policy benefits in the consolidated statements of operations.

j) Assumed reinsurance programs involving minimum benefit guarantees under variable annuity contracts

Chubb reinsures various death and living benefit guarantees associated with variable annuities issued primarily in the United States and Japan. We generally receive a monthly premium during the accumulation phase of the covered annuities (in-force) based on a percentage of either the underlying accumulated account values or the underlying accumulated guaranteed values. Depending on an annuitant's age, the accumulation phase can last many years. To limit our exposure under these programs, all reinsurance treaties include annual or aggregate claim limits and many include an aggregate deductible.

The guarantees which are payable on death, referred to as guaranteed minimum death benefits (GMDB), principally cover shortfalls between accumulated account value at the time of an annuitant's death and either i) an annuitant's total deposits; ii) an annuitant's total deposits plus a minimum annual return; or iii) the highest accumulated account value attained at any policy anniversary date. In addition, a death benefit may be based on a formula specified in the variable annuity contract that uses a percentage of the growth of the underlying contract value. Liabilities for GMDBs are based on cumulative assessments or premiums to date multiplied by a benefit ratio that is determined by estimating the present value of benefit payments and related adjustment expenses divided by the present value of cumulative assessment or expected premiums during the contract period.  

Under reinsurance programs covering GLBs, we assume the risk of guaranteed minimum income benefits (GMIB) and guaranteed minimum accumulation benefits (GMAB) associated with variable annuity contracts. The GMIB risk is triggered if, at the time the contract holder elects to convert the accumulated account value to a periodic payment stream (annuitize), the accumulated account value is not sufficient to provide a guaranteed minimum level of monthly income. The GMAB risk is triggered if, at contract maturity, the contract holder's account value is less than a guaranteed minimum value. Our GLB reinsurance products meet the definition of a derivative for accounting purposes and is carried at fair value with changes in fair value recognized in income. Refer to Notes 5c) and 10 a) for additional information.

k) Deposit assets and liabilities

Deposit assets arise from ceded reinsurance contracts purchased that do not transfer significant underwriting or timing risk. Deposit liabilities include reinsurance deposit liabilities and contract holder deposit funds. The reinsurance deposit liabilities arise from contracts sold for which there is not a significant transfer of risk. Contract holder deposit funds represent a liability for investment contracts sold that do not meet the definition of an insurance contract, and certain of these contracts are sold with a guaranteed rate of return. Under deposit accounting, consideration received or paid is recorded as a deposit asset or liability in the balance sheet as opposed to recording premiums and losses in the statement of operations.

Interest income on deposit assets, representing the consideration received or to be received in excess of cash payments related to the deposit contract, is earned based on an effective yield calculation. The calculation of the effective yield is based on the amount and timing of actual cash flows at the balance sheet date and the estimated amount and timing of future cash flows. The effective yield is recalculated periodically to reflect revised estimates of cash flows. When a change in the actual or estimated cash flows occurs, the resulting change to the carrying amount of the deposit asset is reported as income or expense. Deposit assets of $86 million and $89 million at December 31, 2015 and 2014, respectively, are reflected in Other assets in the consolidated balance sheets and the accretion of deposit assets related to interest pursuant to the effective yield calculation is reflected in Net investment income in the consolidated statements of operations.

Deposit liabilities include reinsurance deposit liabilities of $110 million and $120 million and contract holder deposit funds of $1.1 billion and $908 million at December 31, 2015 and 2014, respectively. Deposit liabilities are reflected in Accounts

F-15

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

payable, accrued expenses, and other liabilities in the consolidated balance sheets. At contract inception, the deposit liability equals net cash received. An accretion rate is established based on actuarial estimates whereby the deposit liability is increased to the estimated amount payable over the contract term. The deposit accretion rate is the rate of return required to fund expected future payment obligations. We periodically reassess the estimated ultimate liability and related expected rate of return. Changes to the deposit liability are generally reflected through Interest expense to reflect the cumulative effect of the period the contract has been in force, and by an adjustment to the future accretion rate of the liability over the remaining estimated contract term.

The liability for contract holder deposit funds equals accumulated policy account values, which consist of the deposit payments plus credited interest less withdrawals and amounts assessed through the end of the period.

l) Foreign currency remeasurement and translation

The functional currency for each of our foreign operations is generally the currency of the local operating environment. Transactions in currencies other than a foreign operation's functional currency are remeasured into the functional currency and the resulting foreign exchange gains and losses are reflected in Net realized gains (losses) in the consolidated statements of operations. Functional currency assets and liabilities are translated into the reporting currency, U.S. dollars, using period end exchange rates and the related translation adjustments are recorded as a separate component of AOCI. Functional statement of operations amounts expressed in functional currencies are translated using average exchange rates.

m) Administrative expenses

Administrative expenses generally include all operating costs other than policy acquisition costs. The Insurance – North American P&C segment manages and uses an in-house third-party claims administrator, ESIS Inc. (ESIS).  ESIS performs claims management and risk control services for domestic and international organizations that self-insure P&C exposures as well as internal P&C exposures.  The net operating results of ESIS are included within Administrative expenses in the consolidated statements of operations and were $30 million, $27 million, and $25 million for the years ended December 31, 2015, 2014, and 2013, respectively.

n) Income taxes

Income taxes have been recorded related to those operations subject to income taxes. Deferred tax assets and liabilities result from temporary differences between the amounts recorded in the consolidated financial statements and the tax basis of our assets and liabilities. Refer to Note 8 for additional information. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. A valuation allowance against deferred tax assets is recorded if it is more likely than not that all, or some portion, of the benefits related to deferred tax assets will not be realized. The valuation allowance assessment considers tax planning strategies, where applicable.

We recognize uncertain tax positions deemed more likely than not of being sustained upon examination.  Recognized income tax positions are measured at the largest amount that is greater than 50 percent likely of being realized. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs.

o) Earnings per share

Basic earnings per share is calculated using the weighted-average shares outstanding including participating securities with non-forfeitable rights to dividends such as unvested restricted stock. All potentially dilutive securities including stock options are excluded from the basic earnings per share calculation. In calculating diluted earnings per share, the weighted-average shares outstanding is increased to include all potentially dilutive securities. Basic and diluted earnings per share are calculated by dividing net income by the applicable weighted-average number of shares outstanding during the year.

p) Cash flow information

Premiums received and losses paid associated with the GLB reinsurance products, which as discussed previously meet the definition of a derivative instrument for accounting purposes, are included within Cash flows from operating activities.  Cash flows, such as settlements and collateral requirements, associated with GLB and all other derivative instruments are included on a net basis within Cash flows from investing activities. Purchases, sales, and maturities of short-term investments are recorded on a net basis within Cash flows from investing activities.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

q) Derivatives

Chubb recognizes all derivatives at fair value in the consolidated balance sheets and participates in derivative instruments in two principal ways:

(i)To sell protection to customers as an insurance or reinsurance contract that meets the definition of a derivative for accounting purposes. For 2015 and 2014, the reinsurance of GLBs was our primary product falling into this category; and

(ii)To mitigate financial risks, principally arising from investment holdings, products sold, or assets and liabilities held in foreign currencies. For these instruments, changes in assets or liabilities measured at fair value are recorded as realized gains or losses in the consolidated statement of operations.

We did not designate any derivatives as accounting hedges during 2015, 2014, or 2013.

r) Share-based compensation

Chubb measures and records compensation cost for all share-based payment awards at grant-date fair value. Compensation costs are recognized for share-based payment awards with only service conditions that have graded vesting schedules on a straight-line basis over the requisite service period for each separately vesting portion of the award as if the award was, in substance, multiple awards. Refer to Note 12 for additional information.

s) New accounting pronouncements

Adopted in 2015

Business Combinations – Simplifying the Accounting for Measurement-Period Adjustments

In September 2015, the Financial Accounting Standards Board (FASB) issued guidance to simplify the accounting for adjustments made to provisional valuation amounts recognized in a business combination. The guidance requires that the acquirer must recognize adjustments to provisional valuation amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined.  The guidance eliminates the requirement to retrospectively account for such adjustments. Previously, the accounting for measurement-period adjustments required the acquirer to retrospectively adjust the provisional amounts recognized at the acquisition date with a corresponding adjustment to goodwill.  We early adopted this guidance effective July 1, 2015.  The adoption of this guidance did not have an impact on our financial condition or results of operations.

Disclosures for investments in certain entities that calculate net asset value (NAV)

In May 2015, the FASB issued guidance that eliminated the requirement for investments measured at fair value using NAV as a practical expedient to be categorized within the fair value hierarchy. We adopted this guidance early, effective July 1, 2015 and have retrospectively revised prior year fair value hierarchy disclosures contained in this report to conform to the current period presentation. Refer to Note 4 Fair Value Measurement for further information. This guidance requires a change in disclosure only and adoption of this guidance did not have an impact on our financial condition or results of operations.

Adopted in 2016

Presentation of Debt Issuance Costs

In April 2015, the FASB issued new guidance related to the accounting for debt issuance costs.  The new guidance requires presentation of debt issuance costs in the balance sheet as a deduction from the carrying amount of the related debt liability instead of a deferred charge.  The new guidance requires retrospective adoption and is effective for interim and annual reporting periods beginning after December 15, 2015, with early adoption permitted. Adoption of this guidance will require us to present debt issuance costs, currently recorded in Other assets on the consolidated balance sheets, within Long-term debt.This guidance, which became effective on January 1, 2016, did not have any effect on our results of operations and financial condition.

Accounting guidance not yet adopted

Revenue from Contracts with Customers

In May 2014, the FASB issued an accounting standard that supersedes most existing revenue recognition guidance. The standard excludes from its scope the accounting for insurance contracts, leases, financial instruments, and certain other agreements that are governed under other GAAP guidance, but could affect the revenue recognition for certain of our claims management and risk control services. The updated guidance requires an entity to recognize revenue as performance obligations are met, in order to reflect the transfer of promised goods or services to customers in an amount that reflects the consideration the entity is entitled to receive for those goods or services. The standard is effective for interim and annual reporting periods beginning after December 15, 2017 and may be applied retrospectively or through a cumulative effect

F-17

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

adjustment to retained earnings at the date of adoption. Early adoption is permitted only as of annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. The adoption of this guidance is not expected to have a material impact on our financial condition or results of operations.

Short-Duration Contracts

In May 2015, the FASB issued guidance that requires additional disclosures for short-duration insurance contracts. New disclosure will be required to provide more information about initial claim estimates and subsequent adjustments to those estimates, the methodologies and judgments used to estimate claims, and the timing frequency, and severity of claims. The guidance is effective for public business entities for annual periods beginning after December 15, 2015 and interim periods within annual periods after December 15, 2016. The guidance requires a change in disclosure only and adoption of this guidance will have no impact on our financial condition or results of operations.

2. Acquisitions

Fireman's Fund Insurance Company High Net Worth Personal Lines Insurance Business in the U.S. (Fireman's Fund)

On April 1, 2015, we acquired the Fireman's Fund Insurance Company high net worth personal lines insurance business in the U.S., which included the renewal rights for new and existing business and reinsurance of all existing reserves for $365 million in cash. We acquired assets with a fair value of $753 million, consisting primarily of cash of $629 million and insurance and reinsurance balances receivable of $124 million. We assumed liabilities with a fair value of $863 million, consisting primarily of unpaid losses and loss expenses of $417 million and unearned premiums of $428 million. This acquisition generated $196 million of goodwill, attributable to expected growth and profitability, all of which is expected to be deductible for income tax purposes, and other intangible assets of $278 million, primarily related to renewal rights, based on Chubb’s preliminary purchase price allocation. During the third quarter of 2015, we applied the new measurement-period adjustment guidance and recorded an adjustment to the valuation of our other intangible assets. The acquisition expands our position in the high net worth personal lines insurers in the U.S. The Fireman’s Fund business integrates into our existing high net worth personal lines business, ACE Private Risk Services, which offers a broad range of coverage including homeowners, automobile, umbrella and excess liability, collectibles and yachts. Goodwill and other intangible assets arising from this acquisition are included in our Insurance – North American P&C segment.

Prior year acquisitions

Large Corporate Account P&C Insurance Business of Itaú Seguros, S.A. (Itaú Seguros)

On October 31, 2014, we expanded our presence in Brazil with the acquisition of the large corporate account property and casualty (P&C) insurance business of Itaú Seguros, Brazil's leading carrier for that business, for $606 million in cash. This acquisition generated $445 million of goodwill, attributable to expected growth and profitability, and other intangible assets of $60 million, primarily related to renewal rights based on Chubb's purchase price allocation. During the fourth quarter of 2015, goodwill became deductible for income tax purposes under Brazilian tax law when we merged Itaú Seguros with a Chubb subsidiary.

The Siam Commercial Samaggi Insurance PCL (Samaggi)

We and our local partner acquired 60.86 percent of Samaggi, a general insurance company in Thailand, from Siam Commercial Bank on April 28, 2014, and subsequently acquired an additional 32.17 percent ownership, through a mandatory tender offer, which expired on June 17, 2014. The purchase price for 93.03 percent of the company was $176 million in cash. This acquisition expands our presence in Thailand and Southeast Asia.

The acquisition generated $46 million of goodwill, attributable to expected growth and profitability, none of which is expected to be deductible for income tax purposes, and other intangible assets of $80 million based on Chubb’s purchase price allocation. The other intangible assets primarily relate to a bancassurance agreement.

ABA Seguros

On May 2, 2013, we acquired ABA Seguros, a property and casualty insurer in Mexico that provides automobile, homeowners, and small business coverages, for approximately $690 million in cash.

The acquisition generated $285 million of goodwill, attributable to expected growth and profitability, none of which is expected to be deductible for income tax purposes, and other intangible assets of $140 million based on Chubb’s purchase price allocation. The other intangible assets primarily relate to distribution channels.

F-18

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

Fianzas Monterrey

On April 1, 2013, we acquired Fianzas Monterrey, a leading surety lines company in Mexico offering administrative performance bonds primarily to clients in the construction and industrial sectors, for approximately $293 million in cash. This acquisition expands our global franchise in the surety business and enhances our existing commercial lines and personal accident insurance business in Mexico.

The acquisition generated $137 million of goodwill, attributable to expected growth and profitability, none of which is expected to be deductible for income tax purposes, and other intangible assets of $73 million, based on Chubb's purchase price allocation. The other intangible assets primarily relate to customer lists.

PT Asuransi Jaya Proteksi

We acquired 80 percent of PT Asuransi Jaya Proteksi (JaPro) on September 18, 2012 and our local partner acquired the remaining 20 percent on January 3, 2013. JaPro is one of Indonesia's leading general insurers offering personal lines and commercial coverages. This acquisition diversifies our existing business in Indonesia. The total purchase price for 100 percent of the company was approximately $107 million in cash.

Goodwill and other intangible assets arising from the prior year acquisitions described above are included in our Insurance – Overseas General segment.

The consolidated financial statements include results of acquired businesses from the acquisition dates.

Acquired in 2016

The Chubb Corporation

On January 14, 2016, we completed the acquisition of The Chubb Corporation (Chubb acquisition), a leading provider of middle-market commercial, specialty, surety, and personal insurance for $29.5 billion, comprising $14.3 billion in cash and $15.2 billion in newly-issued stock, based on the Chubb Limited (formerly ACE Limited) closing price on the acquisition date. In addition, we assumed outstanding equity awards to employees, directors, and consultants with an attributed value of approximately $340 million. We financed the cash portion of the transaction through a combination of $9 billion sourced from various Chubb Limited and Chubb Corporation companies plus $5.3 billion of senior notes which were issued in November 2015. Refer to Note 9 for additional information on the senior notes. Under the terms of the merger agreement, The Chubb Corporation merged with a newly-formed subsidiary of Chubb Limited and the combined company is operating under the Chubb name globally.

3. Investments

a) Transfers of securities

During April 2015, we transferred securities, considered essential holdings in a diversified portfolio, with a total fair value of $1.9 billion from Fixed maturities available for sale to Fixed maturities held to maturity.  These securities, which we have the intent and ability to hold to maturity, were transferred given the growth in our investment portfolio over the last several years, as well as continued efforts to manage the diversification of our global portfolio. The net unrealized appreciation at the date of the transfer continues to be reported in the carrying value of the transferred investments and is amortized through OCI over the remaining life of the securities using the effective interest method in a manner consistent with the amortization of any premium or discount. This transfer represents a non-cash transaction and does not impact the Consolidated Statements of Cash Flows.

F-19

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

b) Fixed maturities

December 31, 2015	Amortized Cost		Gross Unrealized Appreciation		Gross Unrealized Depreciation			Fair Value		OTTI Recognized in AOCI
(in millions of U.S. dollars)
Available for sale
U.S. Treasury and agency	$	2,481	$	52	$	(5	)	$	2,528	$	—
Foreign	13,190		468		(213		)	13,445		(13		)
Corporate securities	15,028		355		(454		)	14,929		(28		)
Mortgage-backed securities	9,827		183		(52		)	9,958		(1		)
States, municipalities, and political subdivisions	2,623		110		(6		)	2,727		—
	$	43,149	$	1,168	$	(730	)	$	43,587	$	(42	)
Held to maturity
U.S. Treasury and agency	$	733	$	13	$	(1	)	$	745	$	—
Foreign	763		30		(8		)	785		—
Corporate securities	3,054		57		(55		)	3,056		—
Mortgage-backed securities	1,707		38		(2		)	1,743		—
States, municipalities, and political subdivisions	2,173		52		(2		)	2,223		—
	$	8,430	$	190	$	(68	)	$	8,552	$	—

December 31, 2014	Amortized Cost		Gross Unrealized Appreciation		Gross Unrealized Depreciation			Fair Value		OTTI Recognized in AOCI
(in millions of U.S. dollars)
Available for sale
U.S. Treasury and agency	$	2,741	$	87	$	(8	)	$	2,820	$	—
Foreign	14,703		629		(90		)	15,242		—
Corporate securities	16,897		704		(170		)	17,431		(7		)
Mortgage-backed securities	10,011		304		(29		)	10,286		(1		)
States, municipalities, and political subdivisions	3,474		147		(5		)	3,616		—
	$	47,826	$	1,871	$	(302	)	$	49,395	$	(8	)
Held to maturity
U.S. Treasury and agency	$	832	$	20	$	(2	)	$	850	$	—
Foreign	916		47		—			963		—
Corporate securities	2,323		102		(2		)	2,423		—
Mortgage-backed securities	1,983		57		(1		)	2,039		—
States, municipalities, and political subdivisions	1,277		40		(3		)	1,314		—
	$	7,331	$	266	$	(8	)	$	7,589	$	—

As discussed in Note 3 d), if a credit loss is incurred on an impaired fixed maturity, an OTTI is considered to have occurred and the portion of the impairment not related to credit losses (non-credit OTTI) is recognized in OCI. Included in the “OTTI Recognized in AOCI” columns above are the cumulative amounts of non-credit OTTI recognized in OCI adjusted for subsequent sales, maturities, and redemptions. OTTI recognized in AOCI does not include the impact of subsequent changes in fair value of the related securities. In periods subsequent to a recognition of OTTI in OCI, changes in the fair value of the related fixed maturities are reflected in Unrealized appreciation (depreciation) in the consolidated statement of shareholders' equity. For the years ended December 31, 2015 and 2014, $15 million of net unrealized depreciation and $4 million of net unrealized appreciation, respectively, related to such securities is included in OCI. At December 31, 2015 and 2014, AOCI included cumulative net unrealized depreciation of $35 million and $3 million, respectively, related to securities remaining in the investment portfolio for which a non-credit OTTI was recognized.

F-20

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

Mortgage-backed securities (MBS) issued by U.S. government agencies are combined with all other to be announced mortgage derivatives held (refer to Note 10 c) (iv)) and are included in the category, “Mortgage-backed securities”. Approximately 81 percent and 83 percent of the total mortgage-backed securities at December 31, 2015 and 2014, respectively, are represented by investments in U.S. government agency bonds. The remainder of the mortgage exposure consists of collateralized mortgage obligations and non-government mortgage-backed securities, the majority of which provide a planned structure for principal and interest payments and carry a rating of AAA by the major credit rating agencies.

The following table presents fixed maturities by contractual maturity:

	December 31				December 31
			2015				2014
(in millions of U.S. dollars)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Available for sale
Due in 1 year or less	$	1,856	$	1,865	$	2,187	$	2,206
Due after 1 year through 5 years	14,936		15,104		15,444		15,857
Due after 5 years through 10 years	12,258		12,173		15,663		16,089
Due after 10 years	4,272		4,487		4,521		4,957
	33,322		33,629		37,815		39,109
Mortgage-backed securities	9,827		9,958		10,011		10,286
	$	43,149	$	43,587	$	47,826	$	49,395
Held to maturity
Due in 1 year or less	$	492	$	495	$	353	$	355
Due after 1 year through 5 years	2,443		2,517		2,603		2,693
Due after 5 years through 10 years	2,292		2,313		1,439		1,489
Due after 10 years	1,496		1,484		953		1,013
	6,723		6,809		5,348		5,550
Mortgage-backed securities	1,707		1,743		1,983		2,039
	$	8,430	$	8,552	$	7,331	$	7,589

Expected maturities could differ from contractual maturities because borrowers may have the right to call or prepay obligations, with or without call or prepayment penalties. 

c) Equity securities

	December 31			December 31
(in millions of U.S. dollars)	2015			2014
Cost	$	441		$	440
Gross unrealized appreciation	74			83
Gross unrealized depreciation	(18		)	(13		)
Fair value	$	497		$	510

d) Net realized gains (losses)

In accordance with guidance related to the recognition and presentation of OTTI, when an impairment related to a fixed maturity has occurred, OTTI is required to be recorded in Net income if management has the intent to sell the security or it is more likely than not that we will be required to sell the security before the recovery of its amortized cost. Further, in cases where we do not intend to sell the security and it is more likely than not that we will not be required to sell the security, we must evaluate the security to determine the portion of the impairment, if any, related to credit losses. If a credit loss is incurred, an OTTI is considered to have occurred and any portion of the OTTI related to credit losses must be reflected in Net income while the portion of OTTI related to all other factors is recognized in OCI. For fixed maturities held to maturity, OTTI recognized in OCI is accreted from AOCI to the amortized cost of the fixed maturity prospectively over the remaining term of the securities.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

Each quarter, securities in an unrealized loss position (impaired securities), including fixed maturities, securities lending collateral, equity securities, and other investments, are reviewed to identify impaired securities to be specifically evaluated for a potential OTTI.

For all non-fixed maturities, OTTI is evaluated based on the following:

• the amount of time a security has been in a loss position and the magnitude of the loss position;

• the period in which cost is expected to be recovered, if at all, based on various criteria including economic conditions and other issuer-specific developments; and

• Our ability and intent to hold the security to the expected recovery period.

As a general rule, we also consider that equity securities in an unrealized loss position for twelve consecutive months are other than temporarily impaired. For mutual funds included in equity securities in our consolidated balance sheet, we employ analysis similar to fixed maturities, when applicable.

Evaluation of potential credit losses related to fixed maturities

We review each fixed maturity in an unrealized loss position to assess whether the security is a candidate for credit loss. Specifically, we consider credit rating, market price, and issuer-specific financial information, among other factors, to assess the likelihood of collection of all principal and interest as contractually due. Securities for which we determine that credit loss is likely are subjected to further analysis to estimate the credit loss recognized in Net income, if any. In general, credit loss recognized in Net income equals the difference between the security’s amortized cost and the net present value of its projected future cash flows discounted at the effective interest rate implicit in the debt security. All significant assumptions used in determining credit losses are subject to change as market conditions evolve.

U.S. Treasury and agency obligations (including agency mortgage-backed securities); foreign government obligations; and states, municipalities, and political subdivisions obligations

U.S. Treasury and agency obligations (including agency mortgage-backed securities); foreign government obligations; and states, municipalities, and political subdivisions obligations represent $100 million of gross unrealized loss at December 31, 2015. These securities were evaluated for credit loss primarily using qualitative assessments of the likelihood of credit loss considering credit rating of the issuers and level of credit enhancement, if any. We concluded that the high level of creditworthiness of the issuers coupled with credit enhancement, where applicable, supports recognizing no credit loss in net income.

Corporate securities

Projected cash flows for corporate securities (principally senior unsecured bonds) are driven primarily by assumptions regarding probability of default and also the timing and amount of recoveries associated with defaults. Chubb developed projected cash flows for corporate securities using market observable data, issuer-specific information, and credit ratings. We use historical default data by Moody’s Investors Service (Moody’s) rating category to calculate a 1-in-100 year probability of default, which results in a default assumption in excess of the historical mean default rate. Consistent with management's approach, Chubb assumed a 32 percent recovery rate (the par value of a defaulted security that will be recovered) across all rating categories rather than using Moody's historical mean recovery rate of 42 percent. We believe that use of a default assumption in excess of the historical mean is conservative in light of current market conditions.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

The following table presents default assumptions by Moody's rating category (historical mean default rate provided for comparison):

Moody's Rating Category	1-in-100 Year Default Rate		Historical Mean Default Rate
Investment Grade:
Aaa-Baa	0.0-1.3%		0.0-0.3%
Below Investment Grade:
Ba	4.9	%	1.1	%
B	12.7	%	3.4	%
Caa-C	50.2	%	13.1	%

Application of the methodology and assumptions described above resulted in credit losses recognized in Net income for corporate securities of $50 million, $27 million, and $11 million for the years ended December 31, 2015, 2014, and 2013, respectively.

Mortgage-backed securities

For mortgage-backed securities, credit impairment is assessed using a cash flow model that estimates the cash flows on the underlying mortgages, using the security-specific collateral and transaction structure. The model estimates cash flows from the underlying mortgage loans and distributes those cash flows to various tranches of securities, considering the transaction structure and any subordination and credit enhancements that exist in that structure. The cash flow model incorporates actual cash flows on the mortgage-backed securities through the current period and then projects the remaining cash flows using a number of assumptions, including default rates, prepayment rates, and loss severity rates (the par value of a defaulted security that will not be recovered) on foreclosed properties.

We develop specific assumptions using market data, where available, and includes internal estimates as well as estimates published by rating agencies and other third-party sources. We project default rates by mortgage sector considering current underlying mortgage loan performance, generally assuming lower loss severity for Prime sector bonds versus ALT-A and Sub-prime bonds.

These estimates are extrapolated along a default timing curve to estimate the total lifetime pool default rate. Other assumptions used contemplate the actual collateral attributes, including geographic concentrations, rating agency loss projections, rating actions, and current market prices. If cash flow projections indicate that losses will exceed the credit enhancement for a given tranche, then we do not expect to recover our amortized cost basis, and we recognize an estimated credit loss in Net income.

For the years ended December 31, 2015 and 2014, there were no credit losses recognized in Net income for mortgage-backed securities and $1 million for 2013.

F-23

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

The following table presents the Net realized gains (losses) and the losses included in Net realized gains (losses) and OCI as a result of conditions which caused us to conclude the decline in fair value of certain investments was “other-than-temporary” and the change in net unrealized appreciation (depreciation) of investments: 

	Year Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Fixed maturities:
OTTI on fixed maturities, gross	$	(142	)	$	(64	)	$	(18	)
OTTI on fixed maturities recognized in OCI (pre-tax)	39			7			—
OTTI on fixed maturities, net	(103		)	(57		)	(18		)
Gross realized gains excluding OTTI	158			213			237
Gross realized losses excluding OTTI	(235		)	(133		)	(129		)
Total fixed maturities	(180		)	23			90
Equity securities:
OTTI on equity securities	(7		)	(8		)	(2		)
Gross realized gains excluding OTTI	47			22			21
Gross realized losses excluding OTTI	(11		)	(61		)	(4		)
Total equity securities	29			(47		)	15
OTTI on other investments	(2		)	(3		)	(2		)
Foreign exchange gains (losses)	(80		)	(40		)	29
Investment and embedded derivative instruments	32			(107		)	78
Fair value adjustments on insurance derivative	(203		)	(217		)	878
S&P put options and futures	(10		)	(168		)	(579		)
Other derivative instruments	(12		)	50			(2		)
Other	6			2			(3		)
Net realized gains (losses)	(420		)	(507		)	504
Change in net unrealized appreciation (depreciation) on investments:
Fixed maturities available for sale	(1,119		)	734			(1,798		)
Fixed maturities held to maturity	43			(2		)	(82		)
Equity securities	(17		)	77			(41		)
Other	(36		)	35			54
Income tax (expense) benefit	152			(167		)	408
Change in net unrealized appreciation (depreciation) on investments	(977		)	677			(1,459		)
Total net realized gains (losses) and change in net unrealized appreciation (depreciation) on investments	$	(1,397	)	$	170		$	(955	)

F-24

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

The following table presents a roll-forward of pre-tax credit losses related to fixed maturities for which a portion of OTTI was recognized in OCI: 

	Year Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Balance of credit losses related to securities still held – beginning of year	$	28		$	37		$	43
Additions where no OTTI was previously recorded	41			22			9
Additions where an OTTI was previously recorded	9			5			3
Reductions for securities sold during the period	(25		)	(36		)	(18		)
Balance of credit losses related to securities still held – end of year	$	53		$	28		$	37

e) Other investments

			December 31				December 31
			2015				2014
(in millions of U.S. dollars)	Fair Value		Cost		Fair Value		Cost
Investment funds	$	269	$	138	$	378	$	228
Limited partnerships	709		542		691		497
Partially-owned investment companies	1,498		1,498		1,492		1,492
Life insurance policies	222		222		205		205
Policy loans	184		184		187		187
Trading securities	284		284		290		287
Other	125		125		103		103
Total	$	3,291	$	2,993	$	3,346	$	2,999

Investment funds include one highly diversified fund investment as well as several direct funds that employ a variety of investment styles such as long/short equity and arbitrage/distressed. Included in limited partnerships and partially-owned investment companies are 67 individual limited partnerships covering a broad range of investment strategies including large cap buyouts, specialist buyouts, growth capital, distressed, mezzanine, real estate, and co-investments. The underlying portfolio consists of various public and private debt and equity securities of publicly traded and privately held companies and real estate assets.  The underlying investments across various partnerships, geographies, industries, asset types, and investment strategies provide risk diversification within the limited partnership portfolio and the overall investment portfolio.  Trading securities comprise $257 million of mutual funds supported by assets that do not qualify for separate account reporting under GAAP at December 31, 2015 compared with $261 million at December 31, 2014. Trading securities also includes assets held in rabbi trusts of $20 million of equity securities and $7 million of fixed maturities at December 31, 2015, compared with $22 million of equity securities and $7 million of fixed maturities at December 31, 2014.

f) Investments in partially-owned insurance companies

In 2015, we paid $90 million to acquire 11.3 percent of the common equity of ABR Reinsurance Capital Holdings Ltd. and warrants to acquire 0.5 percent of additional equity.  ABR Reinsurance Capital Holdings Ltd., is the parent company of ABR Reinsurance Ltd. (ABR Re), an independent reinsurance company. Through long-term arrangements, Chubb will be the sole source of reinsurance risks ceded to ABR Re, and BlackRock, Inc. will be ABR Re’s exclusive investment management service provider. As an investor, Chubb is expected to benefit from underwriting profit generated by ABR Re’s reinsuring a wide range of Chubb’s primary insurance business and the income and capital appreciation BlackRock, Inc. seeks to deliver through its investment management services. In addition, Chubb has entered into an arrangement with BlackRock, Inc. under which both Chubb and BlackRock, Inc. will be entitled to an equal share of the aggregate amount of certain fees, including underwriting and investment management performance related fees, in connection with their respective reinsurance and investment management arrangements with ABR Re.

ABR Re is a variable interest entity; however, Chubb is not the primary beneficiary and does not consolidate ABR Re because Chubb does not have the power to control and direct ABR Re’s most significant activities, including investing and underwriting. Our minority ownership interest is accounted for under the equity method of accounting. Chubb cedes premiums to ABR Re and recognizes the associated commissions. At December 31, 2015, Chubb ceded reinsurance premiums of $115 million and

F-25

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

recognized ceded commissions of $30 million. At December 31, 2015, the amount of Reinsurance recoverable on losses and loss expenses was $82 million and the amount of ceded reinsurance premium payable included in Insurance and reinsurance balances payable in the consolidated balance sheet was $6 million.

The following table presents Investments in partially-owned insurance companies:

	December 31						December 31
	2015						2014
(in millions of U.S. dollars, except for percentages)	Carrying Value		Issued  Share Capital		Ownership Percentage		Carrying Value		Issued Share Capital		Ownership Percentage		Domicile
Huatai Group	$	430	$	624	20.0	%	$	397	$	638	20.0	%	China
Huatai Life Insurance Company	107		428		20.0	%	86		438		20.0	%	China
Freisenbruch-Meyer	9		5		40.0	%	9		5		40.0	%	Bermuda
ACE Cooperative Insurance Co. – Saudi Arabia	11		27		30.0	%	10		27		30.0	%	Saudi Arabia
Russian Reinsurance Company	2		4		23.3	%	2		4		23.3	%	Russia
ABR Reinsurance Ltd.	94		800		11.3	%	—		—		—		Bermuda
Total	$	653	$	1,888			$	504	$	1,112

Huatai Group and Huatai Life Insurance Company provide a range of P&C, life, and investment products.

g) Gross unrealized loss

At December 31, 2015, there were 8,542 fixed maturities out of a total of 25,500 fixed maturities in an unrealized loss position. The largest single unrealized loss in the fixed maturities was $5 million. There were 90 equity securities out of a total of 250 equity securities in an unrealized loss position. The largest single unrealized loss in the equity securities was $2 million. Fixed maturities in an unrealized loss position at December 31, 2015, comprised both investment grade and below investment grade securities for which fair value declined primarily due to widening credit spreads since the date of purchase.

The following tables present, for all securities in an unrealized loss position (including securities on loan), the aggregate fair value and gross unrealized loss by length of time the security has continuously been in an unrealized loss position:

	0 – 12 Months					Over 12 Months					Total
December 31, 2015	Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss
(in millions of U.S. dollars)
U.S. Treasury and agency	$	996	$	(5	)	$	153	$	(1	)	$	1,149	$	(6	)
Foreign	3,953		(148		)	436		(73		)	4,389		(221		)
Corporate securities	7,518		(371		)	738		(138		)	8,256		(509		)
Mortgage-backed securities	3,399		(42		)	516		(12		)	3,915		(54		)
States, municipalities, and political subdivisions	556		(6		)	42		(2		)	598		(8		)
Total fixed maturities	16,422		(572		)	1,885		(226		)	18,307		(798		)
Equity securities	131		(18		)	—		—			131		(18		)
Other investments	210		(11		)	—		—			210		(11		)
Total	$	16,763	$	(601	)	$	1,885	$	(226	)	$	18,648	$	(827	)

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

	0 – 12 Months					Over 12 Months					Total
December 31, 2014	Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss
(in millions of U.S. dollars)
U.S. Treasury and agency	$	350	$	(1	)	$	666	$	(9	)	$	1,016	$	(10	)
Foreign	2,262		(75		)	375		(15		)	2,637		(90		)
Corporate securities	4,684		(150		)	738		(22		)	5,422		(172		)
Mortgage-backed securities	704		(2		)	1,663		(28		)	2,367		(30		)
States, municipalities, and political subdivisions	458		(3		)	490		(5		)	948		(8		)
Total fixed maturities	8,458		(231		)	3,932		(79		)	12,390		(310		)
Equity securities	101		(13		)	—		—			101		(13		)
Total	$	8,559	$	(244	)	$	3,932	$	(79	)	$	12,491	$	(323	)

h) Net investment income

	Year Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Fixed maturities	$	2,157		$	2,199		$	2,093
Short-term investments	49			45			29
Equity securities	16			33			37
Other	86			94			105
Gross investment income	2,308			2,371			2,264
Investment expenses	(114		)	(119		)	(120		)
Net investment income	$	2,194		$	2,252		$	2,144

i) Restricted assets

Chubb is required to maintain assets on deposit with various regulatory authorities to support its insurance and reinsurance operations. These requirements are generally promulgated in the statutory regulations of the individual jurisdictions. The assets on deposit are available to settle insurance and reinsurance liabilities. Chubb is also required to restrict assets pledged under repurchase agreements. We also use trust funds in certain large reinsurance transactions where the trust funds are set up for the benefit of the ceding companies and generally take the place of letter of credit (LOC) requirements. We also have investments in segregated portfolios primarily to provide collateral or guarantees for LOC and derivative transactions. Included in restricted assets at December 31, 2015 and 2014, are investments, primarily fixed maturities, totaling $16.9 billion and $16.3 billion, and cash of $110 million and $117 million, respectively.

The following table presents the components of restricted assets: 

	December 31		December 31
(in millions of U.S. dollars)	2015		2014
Trust funds	$	11,862	$	10,838
Deposits with non-U.S. regulatory authorities	2,075		2,305
Assets pledged under repurchase agreements	1,459		1,431
Deposits with U.S. regulatory authorities	1,242		1,345
Other pledged assets	392		457
	$	17,030	$	16,376

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

4. Fair value measurements

In 2015, we retrospectively adopted new accounting guidance that no longer requires investments measured at fair value using NAV to be categorized within the fair value hierarchy. Therefore, we no longer include our investments in partially-owned investment companies, investment funds, and limited partnerships within the fair value hierarchy and the Level 3 rollforward tables disclosed below. Prior year amounts within the fair value hierarchy disclosures contained in this section have been revised to conform to the current year presentation.

a) Fair value hierarchy

Fair value of financial assets and financial liabilities is estimated based on the framework established in the fair value accounting guidance. The guidance defines fair value as the price to sell an asset or transfer a liability (an exit price) in an orderly transaction between market participants and establishes a three-level valuation hierarchy based on the reliability of the inputs. The fair value hierarchy gives the highest priority to quoted prices in active markets and the lowest priority to unobservable data.

The three levels of the hierarchy are as follows:

• Level 1 – Unadjusted quoted prices for identical assets or liabilities in active markets;

• Level 2 – Includes, among other items, inputs other than quoted prices that are observable for the asset or liability such as

interest rates and yield curves, quoted prices for similar assets and liabilities in active markets, and quoted prices for identical or similar assets and liabilities in markets that are not active; and

• Level 3 – Inputs that are unobservable and reflect management’s judgments about assumptions that market participants

would use in pricing an asset or liability.

We categorize financial instruments within the valuation hierarchy at the balance sheet date based upon the lowest level of inputs that are significant to the fair value measurement. Accordingly, transfers between levels within the valuation hierarchy occur when there are significant changes to the inputs, such as increases or decreases in market activity, changes to the availability of current prices, changes to the transparency to underlying inputs, and whether there are significant variances in quoted prices. Transfers in and/or out of any level are assumed to occur at the end of the period.

We use pricing services to obtain fair value measurements for the majority of our investment securities. Based on management’s understanding of the methodologies used, these pricing services only produce an estimate of fair value if there is observable market information that would allow them to make a fair value estimate. Based on our understanding of the market inputs used by the pricing services, all applicable investments have been valued in accordance with GAAP. We do not adjust prices obtained from pricing services. The following is a description of the valuation techniques and inputs used to determine fair values for financial instruments carried at fair value, as well as the general classification of such financial instruments pursuant to the valuation hierarchy.

Fixed maturities

We use pricing services to estimate fair value measurements for the majority of our fixed maturities. The pricing services use market quotations for fixed maturities that have quoted prices in active markets; such securities are classified within Level 1. For fixed maturities other than U.S. Treasury securities that generally do not trade on a daily basis, the pricing services prepare estimates of fair value measurements using their pricing applications, which include available relevant market information, benchmark curves, benchmarking of like securities, sector groupings, and matrix pricing. Additional valuation factors that can be taken into account are nominal spreads, dollar basis, and liquidity adjustments. The pricing services evaluate each asset class based on relevant market and credit information, perceived market movements, and sector news. The market inputs used in the pricing evaluation, listed in the approximate order of priority include: benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, reference data, and industry and economic events. The extent of the use of each input is dependent on the asset class and the market conditions. Given the asset class, the priority of the use of inputs may change, or some market inputs may not be relevant. Additionally, fixed maturities valuation is more subjective when markets are less liquid due to the lack of market based inputs (i.e., stale pricing), which may increase the potential that an investment's estimated fair value is not reflective of the price at which an actual transaction would occur. The overwhelming majority of fixed maturities are classified within Level 2 because the most significant inputs used in the pricing techniques are observable. For a small number of fixed maturities, we obtain a single broker quote (typically from a market maker). Due to the disclaimers on the quotes that indicate that the price is indicative only, we include these fair value estimates in Level 3. 

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

Equity securities

Equity securities with active markets are classified within Level 1 as fair values are based on quoted market prices. For equity securities in markets which are less active, fair values are based on market valuations and are classified within Level 2. Equity securities for which pricing is unobservable are classified within Level 3.

Short-term investments

Short-term investments, which comprise securities due to mature within one year of the date of purchase that are traded in active markets, are classified within Level 1 as fair values are based on quoted market prices. Securities such as commercial paper and discount notes are classified within Level 2 because these securities are typically not actively traded due to their approaching maturity and, as such, their cost approximates fair value. Short-term investments for which pricing is unobservable are classified within Level 3.

Other investments

Fair values for the majority of Other investments including investments in partially-owned investment companies, investment funds, and limited partnerships are based on their respective net asset values or equivalent (NAV) and are excluded from the fair value hierarchy table below. Certain of our long-duration contracts are supported by assets that do not qualify for separate account reporting under GAAP. These assets comprise mutual funds classified within Level 1 in the valuation hierarchy on the same basis as other equity securities traded in active markets. Other investments also include equity securities classified within Level 1, and fixed maturities, classified within Level 2, held in rabbi trusts maintained by Chubb for deferred compensation plans, and are classified within the valuation hierarchy on the same basis as other equity securities and fixed maturities. Other investments for which pricing is unobservable are classified within Level 3.

Securities lending collateral

The underlying assets included in Securities lending collateral in the consolidated balance sheets are fixed maturities which are classified in the valuation hierarchy on the same basis as other fixed maturities. Excluded from the valuation hierarchy is the corresponding liability related to Chubb’s obligation to return the collateral plus interest as it is reported at contract value and not fair value in the consolidated balance sheets.

Investment derivative instruments

Actively traded investment derivative instruments, including futures, options, and forward contracts are classified within Level 1 as fair values are based on quoted market prices. The fair value of cross-currency swaps are based on market valuations and are classified within Level 2. Investment derivative instruments are recorded in either Other assets or Accounts payable, accrued expenses, and other liabilities in the consolidated balance sheets.

Other derivative instruments

We generally maintain positions in other derivative instruments including exchange-traded equity futures contracts and option contracts designed to limit exposure to a severe equity market decline, which would cause an increase in expected claims and, therefore, an increase in reserves for our guaranteed minimum death benefits (GMDB) and guaranteed living benefits (GLB) reinsurance business. Our position in exchange-traded equity futures contracts is classified within Level 1. At December 31, 2015 we held no positions in option contracts on equity market indices. The fair value of the majority of the remaining positions in other derivative instruments is based on significant observable inputs including equity security and interest rate indices. Accordingly, these are classified within Level 2. Other derivative instruments based on unobservable inputs are classified within Level 3. Other derivative instruments are recorded in either Other assets or Accounts payable, accrued expenses, and other liabilities in the consolidated balance sheets.

Separate account assets

Separate account assets represent segregated funds where investment risks are borne by the customers, except to the extent of certain guarantees made by Chubb. Separate account assets comprise mutual funds classified within Level 1 in the valuation hierarchy on the same basis as other equity securities traded in active markets. Separate account assets also include fixed maturities classified within Level 2 because the most significant inputs used in the pricing techniques are observable. Excluded from the valuation hierarchy are the corresponding liabilities as they are reported at contract value and not fair value in the consolidated balance sheets. Separate account assets are recorded in Other assets in the consolidated balance sheets.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

Guaranteed living benefits

The GLB arises from life reinsurance programs covering living benefit guarantees whereby we assume the risk of guaranteed minimum income benefits (GMIB) and guaranteed minimum accumulation benefits (GMAB) associated with variable annuity contracts. GLB’s are recorded in Accounts payable, accrued expenses, and other liabilities and Future policy benefits in the consolidated balance sheets. For GLB reinsurance, Chubb estimates fair value using an internal valuation model which includes current market information and estimates of policyholder behavior. All of the treaties contain claim limits, which are factored into the valuation model. The fair value depends on a number of factors, including interest rates, equity markets, credit risk, current account value, market volatility, expected annuitization rates and other policyholder behavior, and changes in policyholder mortality.

The most significant policyholder behavior assumptions include lapse rates and the GMIB annuitization rates. Assumptions regarding lapse rates and GMIB annuitization rates differ by treaty, but the underlying methodologies to determine rates applied to each treaty are comparable.

A lapse rate is the percentage of in-force policies surrendered in a given calendar year. All else equal, as lapse rates increase, ultimate claim payments will decrease. In general, the base lapse function assumes low lapse rates (ranging from about 1 percent to 6 percent per annum) during the surrender charge period of the GMIB contract, followed by a “spike” lapse rate (ranging from about 10 percent to 30 percent per annum) in the year immediately following the surrender charge period, and then reverting to an ultimate lapse rate (generally around 10 percent per annum), typically over a 2-year period. This base rate is adjusted downward for policies with more valuable guarantees (policies with guaranteed values far in excess of their account values) by multiplying the base lapse rate by a factor ranging from 10 percent to 75 percent. Partial withdrawals and the impact of older policyholders with tax-qualified contracts (due to required minimum distributions) are also reflected in our modeling.

GMIB annuitization rate is the percentage of policies for which the policyholder will elect to annuitize using the guaranteed benefit provided under the GMIB. All else equal, as GMIB annuitization rates increase, ultimate claim payments will increase, subject to treaty claim limits. All GMIB reinsurance treaties include claim limits to protect Chubb in the event that actual annuitization behavior is significantly higher than expected. In general, Chubb assumes that GMIB annuitization rates will be higher for policies with more valuable guarantees (policies with guaranteed values far in excess of their account values). In addition, we also assume that GMIB annuitization rates are higher in the first year immediately following the waiting period (the first year the policies are eligible to annuitize using the GMIB) in comparison to all subsequent years. We do not yet have fully credible annuitization experience for all clients.

The level of annuitization assumptions at December 31, 2015 are as follows:

% of total GMIB guaranteed value	Year of GMIB eligibility	Maximum annuitization rate(s) (per year)	Maximum annuitization rates based on
68%	First year	7% - 55%	Actual Experience
	Subsequent years	5% - 27%
4%	First year	18%	Actual Experience
	Subsequent years	5%, 10%, 27%	Weighted average(1)
28%	First year	7%, 15%, 55%	Weighted average(1)
	Subsequent years	5%, 10%, 27%

⁽¹⁾ Weighted average of three different annuitization rates (with heavier weighting on credible experience from other clients when own experience is less credible)

The effect of changes in key market factors on assumed lapse and annuitization rates reflect emerging trends using data available from cedants. For treaties with limited experience, rates are established in line with data received from other ceding companies adjusted, as appropriate, with industry estimates. The model and related assumptions are regularly re-evaluated by management and enhanced, as appropriate, based upon additional experience obtained related to policyholder behavior and availability of updated information such as market conditions, market participant assumptions, and demographics of in-force annuities. Because of the significant use of unobservable inputs including policyholder behavior, GLB reinsurance is classified within Level 3.

F-30

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

In the fourth quarter of 2015, we completed a review of policyholder behavior related to partial withdrawals and updated our review of policyholder lapse and annuitization behavior by treaty for our variable annuity reinsurance business. Reinsured policies allow for policyholders to make periodic withdrawals from their account values without lapsing the policy. The partial withdrawal results in a reduction to the associated guaranteed value that is either equal or proportional to the amount of the reduction in account value. Based on our review of emerging behavior, we refined our assumptions around the types of partial withdrawals according to their impact on guaranteed value. This resulted in an increase to the fair value of GLB liabilities generating a realized loss of approximately $110 million. As lapse experience continued to emerge, we were able to expand our analysis and further refine our assumptions which resulted in a net increase to the fair value of GLB liabilities generating a realized loss of approximately $10 million. Because of a greater degree of reported experience related to behavior in years subsequent to the first year of annuitization eligibility, we also made several changes to our annuitization assumptions, which generally lowered the annuitization rate for most clients, while raising it for one client. The change in annuitization assumptions decreased the fair value of GLB liabilities and generated a realized gain of approximately $80 million. We will continue to monitor actual policyholder behavior (lapse, partial withdrawal, and annuitization) against our assumptions and make adjustments as appropriate in the period we receive and analyze this data. Also, during the fourth quarter of 2015, we refined certain assumptions around policyholder annuity type selection based on claim experience. This refinement decreased the fair value of GLB liabilities and generated a realized gain of approximately $45 million.

During each of the years ended December 31, 2015, 2014, and 2013, we made minor technical refinements to the internal valuation model which resulted in no material impact on the financial statements.

Financial instruments measured at fair value on a recurring basis, by valuation hierarchy 

December 31, 2015	Level 1		Level 2		Level 3		Total
(in millions of U.S. dollars)
Assets:
Fixed maturities available for sale
U.S. Treasury and agency	$	1,712	$	816	$	—	$	2,528
Foreign	—		13,388		57		13,445
Corporate securities	—		14,755		174		14,929
Mortgage-backed securities	—		9,905		53		9,958
States, municipalities, and political subdivisions	—		2,727		—		2,727
	1,712		41,591		284		43,587
Equity securities	481		—		16		497
Short-term investments	7,171		3,275		—		10,446
Other investments(1)	347		230		212		789
Securities lending collateral	—		1,046		—		1,046
Investment derivative instruments	12		—		—		12
Separate account assets	1,464		88		—		1,552
Total assets measured at fair value(1)	$	11,187	$	46,230	$	512	$	57,929
Liabilities:
Investment derivative instruments	$	13	$	—	$	—	$	13
Other derivative instruments	4		—		6		10
GLB(2)	—		—		609		609
Total liabilities measured at fair value	$	17	$	—	$	615	$	632

⁽¹⁾  Excluded from the table above are partially-owned investments, investment funds, and limited partnerships of $2,477 million and other investments of $25 million at December 31, 2015 measured using NAV. Based on new accounting guidance adopted in 2015, these investments are excluded from the hierarchy table.

⁽²⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the consolidated balance sheets. Refer to Note 5c) for additional information.

F-31

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

December 31, 2014	Level 1		Level 2		Level 3		Total
(in millions of U.S. dollars)
Assets:
Fixed maturities available for sale
U.S. Treasury and agency	$	1,680	$	1,140	$	—	$	2,820
Foreign	—		15,220		22		15,242
Corporate securities	—		17,244		187		17,431
Mortgage-backed securities	—		10,271		15		10,286
States, municipalities, and political subdivisions	—		3,616		—		3,616
	1,680		47,491		224		49,395
Equity securities	492		16		2		510
Short-term investments	1,183		1,139		—		2,322
Other investments(1)	370		211		204		785
Securities lending collateral	—		1,330		—		1,330
Investment derivative instruments	18		—		—		18
Other derivative instruments	—		2		—		2
Separate account assets	1,400		90		—		1,490
Total assets measured at fair value(1)	$	5,143	$	50,279	$	430	$	55,852
Liabilities:
Investment derivative instruments	$	36	$	—	$	—	$	36
Other derivative instruments	21		—		4		25
GLB(2)	—		—		406		406
Total liabilities measured at fair value	$	57	$	—	$	410	$	467

⁽¹⁾  Excluded from the table above are partially-owned investments, investment funds, and limited partnerships of$2,561 million at December 31, 2014 measured using NAV. Based on new accounting guidance adopted in 2015, these investments are excluded from the hierarchy table.

⁽²⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the consolidated balance sheets. Refer to Note 5c) for additional information.

The following table presents transfers of financial instruments between Level 1 and Level 2:

			Year Ended December 31
(in millions of U.S. dollars)	2015		2014		2013
Transfers from Level 1 to Level 2	$	—	$	189	$	19
Transfers from Level 2 to Level 1	$	—	$	—	$	—

F-32

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

Fair value of alternative investments

Alternative investments include investment funds, limited partnerships, and partially-owned investment companies measured at fair value using NAV as a practical expedient.

The following table presents, by investment category, the expected liquidation period, fair value, and maximum future funding commitments of alternative investments: 

		December 31				December 31
		2015				2014
(in millions of U.S. dollars)	Expected Liquidation Period of Underlying Assets	Fair Value		Maximum Future Funding Commitments		Fair Value		Maximum Future Funding Commitments
Financial	5 to 9 Years	$	300	$	105	$	282	$	145
Real Assets	3 to 7 Years	474		140		451		210
Distressed	5 to 9 Years	261		218		232		175
Private Credit	3 to 7 Years	265		209		299		190
Traditional	3 to 9 Years	895		152		895		285
Vintage	1 to 2 Years	13		—		24		5
Investment funds	Not Applicable	269		—		378		—
		$	2,477	$	824	$	2,561	$	1,010

In 2015, we redefined and regrouped certain alternative investment categories to better align with our management approach. The prior year amounts have been reclassified to conform to the current year presentation. Included in all categories in the above table except for Investment funds are investments for which Chubb will never have the contractual option to redeem but receives distributions based on the liquidation of the underlying assets. Further, for all categories except for Investment funds, Chubb does not have the ability to sell or transfer the investments without the consent from the general partner of individual funds.

Investment Category	Consists of investments in private equity funds:
Financial	targeting financial services companies such as financial institutions and insurance services worldwide
Real Assets	targeting investments related to hard physical assets such as real estate, infrastructure and natural resources
Distressed	targeting distressed corporate debt/credit and equity opportunities in the U.S.
Private Credit	targeting privately originated corporate debt investments including senior secured loans and subordinated bonds
Traditional	employing traditional private equity investment strategies such as buyout and growth equity globally
Vintage	made before 2002 and where the funds’ commitment periods had already expired

Investment funds

Chubb’s investment funds employ various investment strategies such as long/short equity and arbitrage/distressed. Included in this category are investments for which Chubb has the option to redeem at agreed upon value as described in each investment fund’s subscription agreement. Depending on the terms of the various subscription agreements, investment fund investments may be redeemed monthly, quarterly, semi-annually, or annually. If Chubb wishes to redeem an investment fund investment, it must first determine if the investment fund is still in a lock-up period (a time when Chubb cannot redeem its investment so that the investment fund manager has time to build the portfolio). If the investment fund is no longer in its lock-up period, Chubb must then notify the investment fund manager of its intention to redeem by the notification date prescribed by the subscription agreement. Subsequent to notification, the investment fund can redeem Chubb’s investment within several months of the notification. Notice periods for redemption of the investment funds range between 5 and 120 days. Chubb can redeem its investment funds without consent from the investment fund managers.

F-33

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

Level 3 financial instruments

The fair values of assets and liabilities measured at fair value using significant unobservable inputs (Level 3) consist of various inputs and assumptions that management makes when determining fair value. Management analyzes changes in fair value measurements classified within Level 3 by comparing pricing and returns of our investments to benchmarks, including month-over-month movements, investment credit spreads, interest rate movements, and credit quality of securities.

The following table presents the significant unobservable inputs used in the Level 3 liability valuations. Excluded from the table below are inputs used to determine the fair value of Level 3 assets which are based on single broker quotes and contain no quantitative unobservable inputs developed by management.

(in millions of U.S. dollars, except for percentages)	Fair Value at December 31, 2015		Valuation Technique	Significant Unobservable Inputs	Ranges
GLB(1)	$	609	Actuarial model	Lapse rate	1% – 30%
				Annuitization rate	0% – 55%

⁽¹⁾  Discussion of the most significant inputs used in the fair value measurement of GLB and the sensitivity of those assumptions is included within Note 4 a) Guaranteed living benefits.

The following tables present a reconciliation of the beginning and ending balances of financial instruments measured at fair value using significant unobservable inputs (Level 3): 

														Assets					Liabilities
	Available-for-Sale Debt Securities										Equity securities			Other investments			Other derivative instruments		GLB(1)
Year Ended December 31, 2015		Foreign			Corporate securities			MBS
(in millions of U.S. dollars)
Balance, beginning of year		$	22		$	187		$	15		$	2		$	204		$	4	$	406
Transfers into Level 3		34			16			—			—			—			—		—
Change in Net Unrealized Gains (Losses) included in OCI		(2		)	(1		)	—			3			(6		)	—		—
Net Realized Gains/Losses		(1		)	(4		)	—			(2		)	—			2		203
Purchases		15			52			41			13			33			—		—
Sales		(3		)	(28		)	(2		)	—			—			—		—
Settlements		(8		)	(48		)	(1		)	—			(19		)	—		—
Balance, end of year		$	57		$	174		$	53		$	16		$	212		$	6	$	609
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date		$	(1	)	$	(2	)	$	—		$	(2	)	$	—		$	2	$	203

⁽¹⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the consolidated balance sheets. Refer to Note 5c) for additional information.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

	Assets																					Liabilities
	Available-for-Sale Debt Securities										Equity securities			Short-term investments			Other investments			Other derivative instruments		GLB(1)
Year ended December 31, 2014		Foreign			Corporate securities			MBS
(in millions of U.S. dollars)
Balance, beginning of year		$	44		$	166		$	8		$	4		$	7		$	196		$	—	$	193
Transfers into Level 3		10			37			—			—			—			—			2		—
Transfers out of Level 3		(34		)	(23		)	—			(2		)	(7		)	—			—		—
Change in Net Unrealized Gains (Losses) included in OCI		(1		)	(1		)	—			—			—			(1		)	—		—
Net Realized Gains/Losses		(3		)	(5		)	—			—			—			—			2		213
Purchases		15			73			8			2			—			20			—		—
Sales		(4		)	(38		)	—			(2		)	—			—			—		—
Settlements		(5		)	(22		)	(1		)	—			—			(11		)	—		—
Balance, end of year		$	22		$	187		$	15		$	2		$	—		$	204		$	4	$	406
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date		$	(4	)	$	(5	)	$	—		$	—		$	—		$	—		$	2	$	213

⁽¹⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the consolidated balance sheets. The liability for GLB reinsurance was $663 million at December 31, 2014 and $427 million at December 31, 2013, which includes a fair value derivative adjustment of $406 million and $193 million, respectively. 

	Assets																		Liabilities
	Available-for-Sale Debt Securities																		GLB(1)
Year ended December 31, 2013	Foreign			Corporate securities			MBS			Equity securities			Short term investments			Other investments
(in millions of U.S. dollars)
Balance, beginning of year	$	60		$	102		$	13		$	3		$	—		$	180		$	1,119
Transfers into Level 3	36			47			—			8			8			—			—
Transfers out of Level 3	(54		)	(31		)	—			(1		)	(2		)	—			—
Change in Net Unrealized Gains (Losses) included in OCI	—			—			—			(6		)	—			(2		)	—
Net Realized Gains/Losses	1			(2		)	—			4			—			—			(926		)
Purchases	24			75			—			2			3			29			—
Sales	(21		)	(7		)	(3		)	(6		)	(1		)	—			—
Settlements	(2		)	(18		)	(2		)	—			(1		)	(11		)	—
Balance, end of year	$	44		$	166		$	8		$	4		$	7		$	196		$	193
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date	$	—		$	(2	)	$	—		$	—		$	—		$	—		$	(926	)

⁽¹⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the consolidated balance sheets. The liability for GLB reinsurance was $427 million at December 31, 2013 and $1.4 billion at December 31, 2012, which includes a fair value derivative adjustment of $193 million and $1.1 billion, respectively. 

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

b) Financial instruments disclosed, but not measured, at fair value

Chubb uses various financial instruments in the normal course of its business. Our insurance contracts are excluded from fair value of financial instruments accounting guidance, and therefore, are not included in the amounts discussed below.

The carrying values of cash, other assets, other liabilities, and other financial instruments not included below approximated their fair values.

Investments in partially-owned insurance companies

Fair values for investments in partially-owned insurance companies are based on Chubb’s share of the net assets based on the financial statements provided by those companies and are excluded from the valuation hierarchy tables below.

Short- and long-term debt, repurchase agreements and trust preferred securities

Where practical, fair values for short-term debt, long-term debt, repurchase agreements and trust preferred securities are estimated using discounted cash flow calculations based principally on observable inputs including incremental borrowing rates, which reflect Chubb’s credit rating, for similar types of borrowings with maturities consistent with those remaining for the debt being valued.

The following tables present fair value, by valuation hierarchy, and carrying value of the financial instruments not measured at fair value:

December 31, 2015	Fair Value								Carrying Value
(in millions of U.S. dollars)	Level 1		Level 2		Level 3		Total
Assets:
Fixed maturities held to maturity
U.S. Treasury and agency	$	583	$	162	$	—	$	745	$	733
Foreign	—		785		—		785		763
Corporate securities	—		3,042		14		3,056		3,054
Mortgage-backed securities	—		1,743		—		1,743		1,707
States, municipalities, and political subdivisions	—		2,223		—		2,223		2,173
Total assets	$	583	$	7,955	$	14	$	8,552	$	8,430
Liabilities:
Repurchase agreements	$	—	$	1,404	$	—	$	1,404	$	1,404
Long-term debt	—		9,678		—		9,678		9,447
Trust preferred securities	—		446		—		446		309
Total liabilities	$	—	$	11,528	$	—	$	11,528	$	11,160

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

December 31, 2014	Fair Value								Carrying Value
(in millions of U.S. dollars)	Level 1		Level 2		Level 3		Total
Assets:
Fixed maturities held to maturity
U.S. Treasury and agency	$	659	$	191	$	—	$	850	$	832
Foreign	—		963		—		963		916
Corporate securities	—		2,408		15		2,423		2,323
Mortgage-backed securities	—		2,039		—		2,039		1,983
States, municipalities, and political subdivisions	—		1,314		—		1,314		1,277
Total assets	$	659	$	6,915	$	15	$	7,589	$	7,331
Liabilities:
Repurchase Agreements	$	—	$	1,402	$	—	$	1,402	$	1,402
Short-term debt	—		1,169		—		1,169		1,150
Long-term debt	—		3,690		—		3,690		3,357
Trust preferred securities	—		462		—		462		309
Total liabilities	$	—	$	6,723	$	—	$	6,723	$	6,218

5. Reinsurance

a) Consolidated reinsurance

Chubb purchases reinsurance to manage various exposures including catastrophe risks. Although reinsurance agreements contractually obligate Chubb's reinsurers to reimburse it for the agreed-upon portion of its gross paid losses, they do not discharge Chubb's primary liability. The amounts for net premiums written and net premiums earned in the consolidated statements of operations are net of reinsurance. The following table presents direct, assumed, and ceded premiums:

	Year Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Premiums written
Direct	$	19,879		$	20,069		$	19,212
Assumed		3,932			3,321			3,616
Ceded		(6,098	)		(5,591	)		(5,803	)
Net	$	17,713		$	17,799		$	17,025
Premiums earned
Direct	$	19,355		$	19,555		$	18,856
Assumed		3,676			3,336			3,479
Ceded		(5,818	)		(5,465	)		(5,722	)
Net	$	17,213		$	17,426		$	16,613

For each of the years ended December 31, 2015, 2014, and 2013, reinsurance recoveries on losses and loss expenses incurred were $3.1 billion.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

b) Reinsurance recoverable on ceded reinsurance

	December 31			December 31
(in millions of U.S. dollars)	2015			2014
Reinsurance recoverable on unpaid losses and loss expenses (1)		$	10,741		$	11,307
Reinsurance recoverable on paid losses and loss expenses (1)		645			685
Net reinsurance recoverable on losses and loss expenses		$	11,386		$	11,992

⁽¹⁾  Net of a provision for uncollectible reinsurance.

We evaluate the financial condition of our reinsurers and potential reinsurers on a regular basis and also monitor concentrations of credit risk with reinsurers. The provision for uncollectible reinsurance is required principally due to the potential failure of reinsurers to indemnify Chubb, primarily because of disputes under reinsurance contracts and insolvencies. We have established provisions for amounts estimated to be uncollectible. At December 31, 2015 and 2014, we recorded a provision for uncollectible reinsurance of $328 million and $357 million, respectively.

The following tables present a listing, at December 31, 2015, of the categories of Chubb's reinsurers.

December 31, 2015	Gross Reinsurance Recoverable on Loss and Loss Expenses		Provision for Uncollectible Reinsurance		% of Gross Reinsurance Recoverable
(in millions of U.S. dollars, except for percentages)
Categories
Largest reinsurers	$	5,335	$	69	1.3	%
Other reinsurers rated A- or better	3,078		44		1.4	%
Other reinsurers with ratings lower than A- or not rated	378		68		18.0	%
Pools	347		14		4.0	%
Structured settlements	546		10		1.8	%
Captives	1,786		23		1.3	%
Other	244		100		41.0	%
Total	$	11,714	$	328	2.8	%

Largest Reinsurers
Alleghany Corp	HDI Group (Hannover Re)	Munich Re Group
Atlantic Indemnity	IRB Brasil Resseguros S.A. Group	Partner Re Group
Berkshire Hathaway Insurance Group	Lloyd's of London	Swiss Re Group

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

Categories of Chubb's reinsurers	Comprises:
Largest reinsurers	• All groups of reinsurers or captives where the gross recoverable exceeds one percent of Chubb's total shareholders' equity.
Other reinsurers rated A- or better	• All reinsurers rated A- or better that were not included in the largest reinsurer category.
Other reinsurers rated lower than A- or not rated	• All reinsurers rated lower than A- or not rated that were not included in the largest reinsurer category.
Pools	• Related to Chubb's voluntary pool participation and Chubb's mandatory pool participation required by law in certain states.
Structured settlements	• Annuities purchased from life insurance companies to settle claims. Since we retain ultimate liability in the event that the life company fails to pay, we reflect the amounts as both a liability and a recoverable/receivable for GAAP purposes.
Captives	• Companies established and owned by our insurance clients to assume a significant portion of their direct insurance risk from Chubb; structured to allow clients to self-insure a portion of their reinsurance risk. It generally is our policy to obtain collateral equal to expected losses. Where appropriate, exceptions are granted but only with review and approval at a senior officer level. Excludes captives included in the largest reinsurer category.
Other	• Recoverables that are in dispute or are from companies that are in supervision, rehabilitation, or liquidation.

The provision for uncollectible reinsurance is principally based on an analysis of the credit quality of the reinsurer and collateral balances. We establish the provision for uncollectible reinsurance for the Other category based on a case-by-case analysis of individual situations including the merits of the underlying matter, credit and collateral analysis, and consideration of our collection experience in similar situations.

c) Assumed life reinsurance programs involving minimum benefit guarantees under variable annuity contracts

The following table presents income and expenses relating to GMDB and GLB reinsurance. GLBs include GMIBs as well as some GMABs originating in Japan.

	Year Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
GMDB
Net premiums earned	$	61		$	71		$	77
Policy benefits and other reserve adjustments	$	34		$	50		$	73
GLB
Net premiums earned	$	121		$	138		$	149
Policy benefits and other reserve adjustments	45			36			27
Net realized gains (losses)	(203		)	(213		)	929
Gain (loss) recognized in Net income	$	(127	)	$	(111	)	$	1,051
Net cash received	$	98		$	125		$	126
Net (increase) decrease in liability	$	(225	)	$	(236	)	$	925

Net realized gains (losses) in the table above include gains (losses) related to foreign exchange and fair value adjustments on insurance derivatives and exclude gains (losses) on S&P put options and futures used to partially offset the risk in the GLB reinsurance portfolio. Refer to Note 10 for additional information.

At December 31, 2015 and 2014, the reported liability for GMDB reinsurance was $117 million and $111 million, respectively. At December 31, 2015 and 2014, the reported liability for GLB reinsurance was $888 million and $663 million, respectively, which includes a fair value derivative adjustment of $609 million and $406 million, respectively. Reported liabilities for both GMDB and GLB reinsurance are determined using internal valuation models. Such valuations require

F-39

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

considerable judgment and are subject to significant uncertainty. The valuation of these products is subject to fluctuations arising from, among other factors, changes in interest rates, changes in equity markets, changes in credit markets, changes in the allocation of the investments underlying annuitants’ account values, and assumptions regarding future policyholder behavior. These models and the related assumptions are regularly reviewed by management and enhanced, as appropriate, based upon improvements in modeling assumptions and availability of updated information, such as market conditions and demographics of in-force annuities.

Variable Annuity Net Amount at Risk

The net amount at risk is defined as the present value of future claim payments assuming policy account values and guaranteed values are fixed at the valuation date (December 31, 2015 and 2014, respectively) and reinsurance coverage ends at the earlier of the maturity of the underlying variable annuity policy or the reinsurance treaty. In addition, the following assumptions were used:

(in millions of U.S. dollars, except for percentages)		Net amount at risk
Reinsurance covering		2015		2014		2015 Future claims discount rate	Other assumptions	Total claims at 100% mortality at December 31, 2015(1)
GMDB Risk Only		$	364	$	418	3.8% - 4.3%	No lapses or withdrawals	$	229
							Mortality according to 100% of the Annuity 2000 mortality table
GLB Risk Only		$	733	$	440	4.5% - 5.0%	No deaths, lapses or withdrawals	N/A
							Annuitization at a frequency most disadvantageous to Chubb(2)
							Claim calculated using interest rates in line with rates used to calculate reserve
Both Risks: (3)	GMDB	$	89	$	76	4.5% - 5.0%	No lapses or withdrawals	$	56
							Mortality according to 100% of the Annuity 2000 mortality table
	GLB	$	422	$	235	4.5% - 5.0%	Annuitization at a frequency most disadvantageous to Chubb(2)	$	—
							Claim calculated using interest rates in line with rates used to calculate reserve

⁽¹⁾ Takes into account all applicable reinsurance treaty claim limits.

⁽²⁾ Annuitization at a level that maximizes claims taking into account the treaty limits.

⁽³⁾ Covering both the GMDB and GLB risks on the same underlying policyholders.

The average attained age of all policyholders for all risk categories above, weighted by the guaranteed value of each reinsured policy, is approximately 69 years.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

6. Intangible assets

Included in Goodwill and other intangible assets in the consolidated balance sheets at December 31, 2015 and 2014, are goodwill of $4.8 billion and $4.9 billion, respectively, and other intangible assets of $887 million and $820 million, respectively.

The following table presents a roll-forward of Goodwill by segment:

(in millions of U.S. dollars)	Insurance – North American P&C			Insurance – North American Agriculture		Insurance – Overseas General			Global Reinsurance		Life			ACE Consolidated
Balance at December 31, 2013	$	1,215		$	134	$	2,054		$	365	$	835		$	4,603
Purchase price allocation adjustment	—			—		4			—		—			4
Acquisition of Samaggi	—			—		46			—		—			46
Acquisition of Itaú Seguros	—			—		449			—		—			449
Foreign exchange revaluation and other	(4		)	—		(187		)	—		(7		)	(198		)
Balance at December 31, 2014	$	1,211		$	134	$	2,366		$	365	$	828		$	4,904
Purchase price allocation adjustment	—			—		(4		)	—		—			(4		)
Acquisition of Fireman's Fund	196			—		—			—		—			196
Foreign exchange revaluation and other	(8		)	—		(284		)	—		(8		)	(300		)
Balance at December 31, 2015	$	1,399		$	134	$	2,078		$	365	$	820		$	4,796

Included in other intangible assets at December 31, 2015 and 2014, are intangible assets subject to amortization of $789 million and $717 million, respectively, and intangible assets not subject to amortization of $98 million and $103 million, respectively. Intangible assets subject to amortization include agency relationships, renewal rights, software, client lists, and trademarks, primarily attributable to the acquisitions of Rain and Hail, Fireman's Fund, Samaggi, ABA Seguros, Itaú Seguros, and Fianzas Monterrey. The majority of the balance of intangible assets not subject to amortization relates to Lloyd's of London (Lloyd's) Syndicate 2488 (Syndicate 2488) capacity. Amortization expense related to other intangible assets amounted to $171 million, $108 million, and $95 million for the years ended December 31, 2015, 2014, and 2013, respectively. Amortization of intangible assets was higher in 2015 due primarily to the acquisitions of Fireman's Fund, Itaú Seguros, and Samaggi.

The following table presents a roll-forward of VOBA:

(in millions of U.S. dollars)	2015			2014			2013
Balance, beginning of year	$	466		$	536		$	614
Amortization expense	(42		)	(51		)	(64		)
Foreign exchange revaluation	(29		)	(19		)	(14		)
Balance, end of year	$	395		$	466		$	536

The following table presents, as of December 31, 2015, the estimated pre-tax amortization expense related to other intangible assets and VOBA for the next five years.

For the Year Ending December 31	Other intangible assets		VOBA
(in millions of U.S. dollars)
2016	$	88	$	39
2017	78		35
2018	70		32
2019	63		27
2020	58		24
Total	$	357	$	157

F-41

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

7. Unpaid losses and loss expenses

Chubb establishes reserves for the estimated unpaid ultimate liability for losses and loss expenses under the terms of its policies and agreements. Reserves include estimates for both claims that have been reported and for IBNR, and include estimates of expenses associated with processing and settling these claims. Reserves are recorded in Unpaid losses and loss expenses in the consolidated balance sheets. The process of establishing loss and loss expense reserves for P&C claims can be complex and is subject to considerable uncertainty as it requires the use of informed estimates and judgments. Our estimates and judgments may be revised as additional experience and other data become available and are reviewed, as new or improved methodologies are developed, or as laws change. We continually evaluate our estimate of reserves in light of developing information and in light of discussions and negotiations with our insureds. While we believe that our reserves for unpaid losses and loss expenses at December 31, 2015 are adequate, new information or trends may lead to future developments in ultimate losses and loss expenses significantly greater or less than the reserves provided. Any such revisions could result in future changes in estimates of losses or reinsurance recoverable and would be reflected in our results of operations in the period in which the estimates are changed.

The following table presents a reconciliation of unpaid losses and loss expenses:

	Years Ended December 31
(in millions of U.S. dollars)	2015				2014				2013
Gross unpaid losses and loss expenses, beginning of year		$	38,315			$	37,443			$	37,946
Reinsurance recoverable on unpaid losses(1)		(11,307		)		(10,612		)		(11,399		)
Net unpaid losses and loss expenses, beginning of year		27,008				26,831				26,547
Acquisition of subsidiaries		417				320				86
Total		27,425				27,151				26,633
Net losses and loss expenses incurred in respect of losses occurring in:
Current year		10,030				10,176				9,878
Prior years		(546		)		(527		)		(530		)
Total		9,484				9,649				9,348
Net losses and loss expenses paid in respect of losses occurring in:
Current year		4,053				3,975				3,942
Prior years		5,612				5,260				5,035
Total		9,665				9,235				8,977
Foreign currency revaluation and other		(682		)		(557		)		(173		)
Net unpaid losses and loss expenses, end of year		26,562				27,008				26,831
Reinsurance recoverable on unpaid losses(1)		10,741				11,307				10,612
Gross unpaid losses and loss expenses, end of year		$	37,303			$	38,315			$	37,443
(1) Net of provision for uncollectible reinsurance.

Net losses and loss expenses incurred includes $546 million, $527 million, and $530 million, of net favorable prior period development (PPD) in the years ended December 31, 2015, 2014, and 2013, respectively. Long-tail lines include lines such as workers’ compensation, general liability, and professional liability; while short-tail lines include lines such as most property lines, energy, personal accident, aviation, marine (including associated liability-related exposures) and agriculture. Significant prior period movements by segment, principally driven by reserve reviews completed during each respective period, are discussed in more detail below. The remaining net development for long-tail and short-tail business for each segment comprises numerous favorable and adverse movements across a number of lines and accident years, none of which is significant individually or in the aggregate.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

Insurance – North American P&C

2015

Insurance – North American P&C's active operations experienced net favorable PPD of $239 million in 2015, which was the net result of several underlying favorable and adverse movements, driven by the following principal changes:

• Net favorable development of $169 million in long-tail business, primarily from:

• Net favorable development of $108 million in our management and professional liability portfolios, primarily impacting accident years 2010 and prior. Lower than expected paid and reported loss activity led to reductions in our estimates of ultimate loss for these accident years;

• Favorable development of $32 million in our auto liability excess lines and $26 million in our general liability product lines primarily impacting the 2010 accident year, resulting from lower than expected loss emergence and an increase in weighting applied to experience-based methods;

• Net favorable development of $21 million in our workers’ compensation lines with favorable development of $52 million in the 2014 accident year related to our annual assessment of multi-claimant events including industrial accidents. Consistent with prior years, we reviewed these potential exposures after the end of the accident year to allow for late reporting or identification of significant losses. Adverse development of $29 million was experienced on the 2009 and prior accident years due to a combination of claim-specific deteriorations and higher than expected loss emergence. There was also adverse development on the 2014 accident year due to revised account-level estimates, which were higher than our original aggregate expectations;

• Favorable development of $24 million in our surety business due to lower than expected claims emergence primarily in the 2013 accident year; and

• Net adverse development of $33 million in our commercial umbrella and excess portfolios, primarily impacting accident years 2010 and 2011. Higher than expected reported loss activity, combined with an increase in weighting applied to experience-based methods, led to increased provisions in accident years 2010 and 2011, which was partly offset by the recognition of favorable emergence in the 2009 and prior accident years.

• Favorable development of $70 million in short-tail business, primarily driven by favorable development of $34 million in our excess property business primarily impacting the 2013 accident year. Paid and reported loss activity was lower than expected leading to reductions in our estimate of ultimate loss.

Insurance – North American P&C's run-off operations incurred adverse PPD of $200 million in our Westchester and Brandywine run-off operations during 2015, which was the result of several adverse movements impacting accident years 1996 and prior, driven by the following principal changes:

• Adverse development of $170 million related to the completion of reserve reviews during 2015. The development primarily arose from case specific settlements and higher than expected remediation expense and defense costs for environmental claims and increases in indemnity and defense costs on a select number of modeled accounts for asbestos.  Further, we experienced higher than expected loss emergence on certain portfolios in our assumed reinsurance book and in other run-off lines; and

• Adverse development of $30 million on unallocated loss adjustment expenses due to run-off operating expenses paid and incurred during 2015.

2014

Insurance – North American P&C's active operations experienced net favorable PPD of $354 million in 2014 which was the net result of several underlying favorable and adverse movements driven by the following principal changes:

• Net favorable development of $298 million in long-tail business, primarily from:

• Favorable development of $104 million in our D&O portfolios, primarily impacting the 2009 and prior accident years. Case incurred loss emergence that was lower than expected combined with an increase in weighting applied to experience-based methods led to a reduction in the estimates of ultimate loss for those years;

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

• Favorable development of $55 million in our excess casualty and umbrella businesses. Resolution of a disputed matter on an individual claim led to a release of $42 million in the 2003 accident year, and lower than expected reported activity across a number of accident years drove the remaining improvement;

• Favorable development of $48 million on an older claim following recent legal developments, after which it was determined that the reserves were no longer required;

• Favorable development of $40 million in our medical risk operations, primarily impacting the 2009 and 2010 accident years. Paid and case incurred loss emergence that was lower than expected combined with an increase in weighting applied to experience-based methods led to a reduction in the estimate of ultimate loss for those years;

• Favorable development of $35 million in our financial solutions business, primarily in the 2010 and prior accident years. Net favorable development principally resulted from the recognition of lower than expected loss activity on two large excess liability transactions;

• Favorable development of $27 million in our surety business, primarily from favorable claims emergence in the 2012 accident year;

• Net adverse development of $32 million in our workers’ compensation lines, with adverse development in the 2013 accident year and mainly favorable development in accident years 2009 and 2010. Adverse development in the 2013 accident year is being driven by one large account which is experiencing higher than expected claims frequency and severity; and

• Net favorable development of $21 million in our auto liability excess lines primarily impacting the 2009 accident year. Reported activity on loss and allocated loss expenses was lower than expected based on estimates from our prior review and original pricing assumptions.

• Favorable development of $56 million in short-tail business, primarily driven by net favorable development of $20 million in our energy and technical risk property business, primarily impacting the 2012 and 2013 accident years. Across most lines, paid and reported loss activity was lower than expected.

Insurance – North American P&C's run-off operations incurred adverse PPD of $247 million in our Westchester and Brandywine run-off operations during 2014, which was a net result of adverse movements impacting accident years 1996 and prior, driven by the following principal changes:

• Adverse development of $215 million related to the completion of reserve reviews during 2014. The development primarily arose from case specific asbestos and environmental claims related to increased payment activity and the costs associated with certain case settlements in 2014. Further, we experienced higher than expected case incurred activity in our assumed reinsurance portfolio; and

• Adverse development of $32 million on unallocated loss adjustment expenses due to run-off operating expenses paid and incurred during 2014.

2013

Insurance – North American P&C active operations experienced net favorable PPD of $327 million in 2013, representing 2.1 percent of its beginning of period net unpaid loss and loss expense reserves. Insurance – North American P&C run-off operations incurred net adverse PPD of $193 million in 2013, representing 1.2 percent of its beginning of period net unpaid loss and loss expense reserves.

Insurance – North American Agriculture

Insurance – North American Agriculture experienced net favorable development of $45 million in short-tail lines in 2015, net adverse development of $34 million in 2014 and net favorable development of $13 million in 2013. Actual claim development in 2015 for the 2014 crop year for the Multiple Peril Crop Insurance (MPCI) business was favorable due to better than expected crop yield results in certain states at year-end 2014. Actual claim development in 2014 for the 2013 crop year for the MPCI business was adverse due to worse than expected crop yield results in certain states at year-end 2013. Net

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

favorable development in 2013 was across a number of accident years, none of which was significant individually or in the aggregate.

Insurance – Overseas General

2015

Insurance – Overseas General experienced net favorable PPD of $343 million in 2015, which was the net result of several underlying favorable and adverse movements, driven by the following principal changes:

• Net favorable development of $166 million in long-tail business, primarily from:

• Net favorable development of $140 million, primarily in casualty and financial lines with favorable development of $175 million in accident years 2011 and prior, resulting from lower than expected loss emergence, and adverse development of $35 million in accident years 2012 to 2014, primarily due to large loss experience in the U.K. and Europe; and

• Favorable development of $26 million on an individual legacy liability case reserve take-down.  This release follows a legal analysis completed in 2015, based on court opinion in the year and discussions with defense counsel, which concluded that these reserves were no longer required.

• Favorable development of $177 million in short-tail business primarily from:

• Favorable development of $90 million in property, technical, energy and marine lines from specific claims and additional credibility assigned to accident years 2013 and prior favorable indications;

• Favorable development of $34 million in accident and health business primarily in accident year 2013 and 2014 across all regions and products, none of which was individually significant; and

• Favorable development of $26 million in consumer business primarily in Latin America and Asia Pacific, resulting from favorable development and additional credibility assigned to accident years 2012 and 2013.

2014

Insurance – Overseas General experienced net favorable PPD of $391 million in 2014, which was the net result of several underlying favorable and adverse movements, driven by the following principal changes:

• Net favorable development of $181 million in long-tail business, primarily from:

• Net favorable development of $102 million primarily in casualty lines with favorable development of $148 million in accident years 2010 and prior, predominantly due to favorable loss experience in European primary and excess lines, and adverse development of $46 million in accident years 2011 to 2013, predominantly due to large loss experience in the U.K. primary and excess lines;

• Favorable development of $52 million on an individual liability case reserve take-down.  This release follows discussions with defense counsel, a review of key legal briefing, and a coverage analysis, all of which was completed in the third quarter of 2014 and after which it was concluded that the reserves were no longer required; and

• Net favorable development of $27 million in financial lines with favorable development of $98 million in accident years 2010 and prior due to favorable loss experience and adverse development of $71 million in accident years 2011 to 2013. The adverse development was primarily due to large loss experience in D&O and financial institutions.

• Favorable development of $210 million in short-tail business, primarily from:

• Favorable development of $136 million across property, technical and marine lines with favorable development of $44 million in accident year 2013 due to favorable large loss experience, and favorable development of $92 million in accident years 2012 and prior due to favorable development on specific claims and an increase in weighting applied to experience-based methods;

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

• Favorable development of $30 million in aviation lines primarily in accident years 2010 and prior in the aviation products, airlines and airport liability lines; and

• Favorable development of $25 million in personal lines primarily in accident years 2011 to 2013 across all Latin America personal lines and Asia Pacific personal automobile lines.

2013

Insurance – Overseas General experienced net favorable PPD of $299 million in 2013, representing 3.8 percent of the segment's beginning of period net unpaid loss and loss expense reserves.

Global Reinsurance

2015

Global Reinsurance experienced net favorable PPD of $119 million in 2015, which was the net result of several underlying favorable and adverse movements, driven by the following principal changes:

• Favorable development of $54 million comprising $42 million in long-tail lines and $12 million in short-tail lines, on an individual legacy liability case reserve take-down. This release follows a legal analysis completed in 2015, based on court opinion and discussions with defense counsel, which concluded that these reserves were no longer required;

• Favorable development of $33 million in professional liability lines, including medical malpractice business, primarily in treaty years 2010 and prior reflecting favorable paid and incurred loss trends and an increase in weighting applied to experience-based methods; and

• Favorable development of $23 million in casualty lines, principally in treaty years 2009 and prior reflecting favorable paid and incurred loss trends and an increase in weighting applied to experience-based methods.

2014

Global Reinsurance experienced net favorable PPD of $63 million in 2014, which was the net result of several underlying favorable and adverse movements, driven by the following principal change:

• Net favorable development of $52 million in long-tail business, primarily from:

• Favorable development of $34 million in professional liability lines, including medical malpractice business, primarily in treaty years 2009 and prior reflecting favorable paid and incurred loss trends and an increase in weighting applied to experience-based methods; and

• Favorable development of $25 million in casualty lines, principally in treaty years 2009 and prior reflecting favorable paid and incurred loss trends and an increase in weighting applied to experience-based methods.

2013

Global Reinsurance experienced net favorable PPD of $84 million in 2013, representing 3.6 percent of the segment's beginning of period net unpaid loss and loss expense reserves.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

Asbestos and environmental (A&E)

Chubb's exposure to A&E claims principally arises out of liabilities acquired when it purchased Westchester Specialty in 1998 and CIGNA's P&C business in 1999, with the larger exposure contained within the liabilities acquired in the CIGNA transaction. The following table presents a roll-forward of consolidated A&E loss reserves, allocated loss expense reserves for A&E exposures, and the provision for uncollectible paid and unpaid reinsurance recoverables:

	Asbestos						Environmental						Total
(in millions of U.S. dollars)	Gross			Net			Gross			Net			Gross			Net
Balance at December 31, 2014	$	1,500		$	892		$	199		$	149		$	1,699		$	1,041
Incurred activity	125			76			118			86			243			162			(1)
Paid activity	(274		)	(137		)	(118		)	(86		)	(392		)	(223		)
Balance at December 31, 2015	$	1,351		$	831		$	199		$	149		$	1,550		$	980

⁽¹⁾ Excludes unallocated loss expenses and the net activity reflects third-party reinsurance other than the aggregate excess of loss reinsurance provided by National Indemnity Company (NICO) to Westchester Specialty (see Westchester Specialty section below).

The A&E net loss reserves including allocated loss expense reserves and provision for uncollectible reinsurance at December 31, 2015 and 2014, of $980 million and $1.0 billion shown in the table above comprise $782 million and $837 million, respectively, of reserves held by Brandywine operations, $115 million and $119 million, respectively, of reserves held by Westchester Specialty, and $83 million and $85 million, respectively, of reserves held by other operations, mainly Insurance – Overseas General. For 2015 and 2014, the incurred activity of $162 million and $210 million, respectively, were primarily the result of our annual internal, ground-up review of A&E liabilities.

Brandywine Run-off entities – The Restructuring Plan and uncertainties relating to Chubb's ultimate Brandywine exposure

In 1996, the Pennsylvania Insurance Commissioner approved a plan to restructure INA Financial Corporation and its subsidiaries (the Restructuring) which included the division of Insurance Company of North America (INA) into two separate corporations:

(1) An active insurance company that retained the INA name and continued to write P&C business; and

(2) An inactive run-off company, now called Century Indemnity Company (Century).

As a result of the division, predominantly all A&E and certain other liabilities of INA were ascribed to Century and extinguished, as a matter of Pennsylvania law, as liabilities of INA.

As part of the Restructuring, most A&E liabilities of various U.S. affiliates of INA were reinsured to Century. Century and certain other run-off companies having A&E and other liabilities were contributed to Brandywine Holdings.

The U.S.-based ACE INA companies assumed two contractual obligations in respect of the Brandywine operations in connection with the Restructuring: a dividend retention fund obligation and a surplus maintenance obligation in the form of the excess of loss (XOL) agreement.

INA Financial Corporation established and funded a dividend retention fund (the Dividend Retention Fund) consisting of $50 million plus investment earnings. The full balance of the Dividend Retention Fund was contributed to Century as of December 31, 2002. Under the Restructuring Order, while any obligation to maintain the Dividend Retention Fund is in effect, to the extent dividends are paid by INA Holdings Corporation to its parent, INA Financial Corporation, and to the extent INA Financial Corporation then pays such dividends to INA Corporation, a portion of those dividends must be withheld to replenish the principal of the Dividend Retention Fund to $50 million. During 2011 and 2010, $35 million and $15 million, respectively, were withheld from such dividends and deposited into the Dividend Retention Fund as a result of dividends paid up to the INA Corporation. Capital contributions from the Dividend Retention Fund to Century are not required until the XOL Agreement has less than $200 million of capacity remaining on an incurred basis for statutory reporting purposes. The amount of the capital contribution shall be the lesser of the amount necessary to restore the XOL Agreement remaining capacity to $200 million or the Dividend Retention Fund balance. The Dividend Retention Fund may not be terminated without prior written approval from the Pennsylvania Insurance Commissioner.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

In addition, an ACE INA insurance subsidiary provided reinsurance coverage to Century in the amount of $800 million under an XOL, triggered if the statutory capital and surplus of Century falls below $25 million or if Century lacks liquid assets with which to pay claims as they become due.

Effective December 31, 2004, ACE INA contributed $100 million to Century in exchange for a surplus note. After giving effect to the contribution and issuance of the surplus note, the statutory surplus of Century at December 31, 2015 was $25 million and approximately $335 million in statutory-basis losses have been ceded to the XOL on an inception-to-date basis. Century reports the amount ceded under the XOL in accordance with statutory accounting principles, which differ from GAAP by, among other things, allowing Century to discount its liabilities, including certain asbestos related and environmental pollution liabilities and Century's reinsurance payable to active companies. For GAAP reporting purposes, intercompany reinsurance recoverables related to the XOL are eliminated upon consolidation.

While Chubb believes it has no legal obligation to fund Century losses above the XOL limit of coverage, Chubb's consolidated results would nevertheless continue to include any losses above the limit of coverage for so long as the Brandywine companies remain consolidated subsidiaries of Chubb.

Certain active Chubbcompanies are primarily liable for asbestos, environmental, and other exposures that they have reinsured to Century. Accordingly, if Century were to become insolvent and placed into rehabilitation or liquidation, some or all of the recoverables due to these active Chubb companies from Century could become uncollectible. At December 31, 2015 and 2014, the aggregate reinsurance recoverables owed by Century to the active Chubb companies were approximately $1.2 billion and $1.1 billion, respectively. Chubb believes the active company intercompany reinsurance recoverables, which relate to direct liabilities payable over many years, are not impaired. At December 31, 2015 and 2014, Century's carried gross reserves (including reserves assumed from the active Chubb companies) were $1.9 billion and $2.1 billion, respectively. Should Century's loss reserves experience adverse development in the future and should Century be placed into rehabilitation or liquidation, the reinsurance recoverables due from Century to the active Chubb companies would be payable only after the payment in full of certain expenses and liabilities, including administrative expenses and direct policy liabilities. Thus, the intercompany reinsurance recoverables would be at risk to the extent of the shortage of assets remaining to pay these recoverables.

Westchester Specialty – impact of NICO contracts on Chubb’s run-off entities

As part of the Westchester Specialty acquisition in 1998, NICO provided a 75 percent pro-rata share of $1 billion of reinsurance protection on losses and loss adjustment expenses incurred on or before December 31, 1996, in excess of a retention of $721 million. At December 31, 2015, the remaining unused incurred limit under the Westchester NICO agreement was $466 million.

8. Taxation

Under Swiss law, a resident company is subject to income tax at the federal, cantonal, and communal levels that is levied on net worldwide income. Income attributable to permanent establishments or real estate located abroad is excluded from the Swiss tax base. Chubb Limited is a holding company and, therefore, is exempt from cantonal and communal income tax. As a result, Chubb Limited is subject to Swiss income tax only at the federal level. Furthermore, participation relief (i.e., tax relief) is granted to Chubb Limited at the federal level for qualifying dividend income and capital gains related to the sale of qualifying participations (i.e., subsidiaries). It is expected that the participation relief will result in a full exemption of participation income from federal income tax. Chubb Limited is subject to an annual cantonal and communal capital tax on the taxable equity of Chubb Limited in Switzerland.

Chubb has two Swiss operating subsidiaries, an insurance company, ACE Insurance (Switzerland) Limited and a reinsurance company, ACE Reinsurance (Switzerland) Limited. Both are subject to federal, cantonal, and communal income tax and to annual cantonal and communal capital tax.

Under current Bermuda law, Chubb Limited and its Bermuda subsidiaries are not required to pay any taxes on income or capital gains. If a Bermuda law were enacted that would impose taxes on income or capital gains, Chubb Limited and the Bermuda subsidiaries have received an undertaking from the Minister of Finance in Bermuda that would exempt such companies from Bermudian taxation until March 2035.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

Income from Chubb's operations at Lloyd's is subject to United Kingdom (U.K.) corporation taxes. Lloyd's is required to pay U.S. income tax on U.S. connected income (U.S. income) written by Lloyd's syndicates. Lloyd's has a closing agreement with the Internal Revenue Service (IRS) whereby the amount of tax due on this business is calculated by Lloyd's and remitted directly to the IRS. These amounts are then charged to the accounts of the Names/Corporate Members in proportion to their participation in the relevant syndicates. Chubb's Corporate Members are subject to this arrangement but, as U.K. domiciled companies, will receive U.K. corporation tax credits for any U.S. income tax incurred up to the value of the equivalent U.K. corporation income tax charge on the U.S. income.

ACE Group Holdings and its respective subsidiaries are subject to income taxes imposed by U.S. authorities and file a consolidated U.S. tax return. Starting in tax year 2014, Combined Insurance and its life subsidiary joined the ACE Group Holdings consolidated return. For tax years prior to 2014, Combined Insurance and its life subsidiary filed a separate consolidated U.S. tax return. Should ACE Group Holdings pay a dividend to Chubb, withholding taxes would apply. Currently, however, no withholding taxes are accrued with respect to such un-remitted earnings as management has no intention of remitting these earnings. Similarly, no taxes have been provided on the un-remitted earnings of certain foreign subsidiaries as management has no intention of remitting these earnings.The cumulative amount that would be subject to withholding tax, if distributed, as well as the determination of the associated tax liability are not practicable to compute; however, such amount would be material to Chubb. Certain international operations of Chubb are also subject to income taxes imposed by the jurisdictions in which they operate.

Chubb is not subject to income taxation other than as stated above.  There can be no assurance that there will not be changes in applicable laws, regulations, or treaties which might require Chubb to change the way it operates or becomes subject to taxation.

Chubb's domestic operations are in Switzerland, the jurisdiction where we are legally organized, incorporated, and registered. Domestic operations for the years ended December 31, 2015, 2014, and 2013 are not considered significant to the consolidated income before income taxes for the respective periods.

The following table presents the provision for income taxes:

	Years Ended December 31
(in millions of U.S. dollars)	2015		2014		2013
Current tax expense	$	304	$	481	$	231
Deferred tax expense	158		153		249
Provision for income taxes	$	462	$	634	$	480

The most significant jurisdictions contributing to the overall taxation of Chubb are calculated using the following rates: Switzerland 7.83 percent, Bermuda 0.0 percent, U.S. 35.0 percent, and U.K. 20.25 percent. The following table presents a reconciliation of the difference between the provision for income taxes and the expected tax provision at the Swiss statutory income tax rate:

	Years Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Expected tax provision at Swiss statutory tax rate	$	258		$	273		$	331
Permanent differences:
Taxes on earnings subject to rate other than Swiss statutory rate	193			224			124
Change to deferred taxes related to unrealized foreign exchange losses (1)	—			139			—
Tax-exempt interest and dividends received deduction, net of proration	(32		)	(33		)	(27		)
Net withholding taxes	35			33			27
Change in valuation allowance (1)	2			(20		)	4
Other	6			18			21
Total provision for income taxes	$	462		$	634		$	480

⁽¹⁾ 2014 includes a charge to deferred taxes related to non-recognition of foreign tax credits related to unrealized foreign exchange losses.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

The following table presents the components of the net deferred tax assets:

	December 31		December 31
(in millions of U.S. dollars)	2015		2014
Deferred tax assets:
Loss reserve discount	$	663	$	794
Unearned premiums reserve	190		99
Foreign tax credits	969		1,103
Investments	29		9
Provision for uncollectible balances	65		81
Loss carry-forwards	72		40
Compensation related amounts	189		185
Other	65		—
Total deferred tax assets	2,242		2,311
Deferred tax liabilities:
Deferred policy acquisition costs	412		213
VOBA and other intangible assets	384		321
Un-remitted foreign earnings	827		939
Unrealized appreciation on investments	195		406
Depreciation	68		77
Other	—		43
Total deferred tax liabilities	1,886		1,999
Valuation allowance	38		17
Net deferred tax assets	$	318	$	295

The valuation allowance of $38 million at December 31, 2015, and $17 million at December 31, 2014, reflects management's assessment, based on available information, that it is more likely than not that a portion of the deferred tax assets will not be realized due to the inability of certain foreign subsidiaries to generate sufficient taxable income. Adjustments to the valuation allowance are made when there is a change in management's assessment of the amount of deferred tax assets that are realizable.

At December 31, 2015, Chubb has net operating loss carry-forwards of $325 million which, if unused, will expire starting in the year 2016, and a foreign tax credit carry-forward in the amount of $142 million which, if unused, will expire in the years 2016 through 2025.

The following table presents a reconciliation of the beginning and ending amount of gross unrecognized tax benefits:

	December 31			December 31
(in millions of U.S. dollars)	2015			2014
Balance, beginning of year	$	23		$	27
Additions based on tax provisions related to the current year	1			2
Reductions for tax positions of prior years	(7		)	—
Reductions for the lapse of the applicable statutes of limitations	(1		)	(6		)
Balance, end of year	$	16		$	23

At December 31, 2015 and 2014, the total amount of unrecognized tax benefits that would affect the effective tax rate, if recognized, were $16 million and $6 million, respectively. At December 31, 2014, $17 million of unrecognized tax benefits would not affect the effective tax rate, if recognized, as the ultimate deductibility is highly certain but there is uncertainty about the timing of such deductibility. Because of the impact of deferred tax accounting, other than interest and penalties, an unfavorable resolution of these temporary items would not affect the effective tax rate but would accelerate the payment of cash to the taxing authority to an earlier period.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

Chubb recognizes accruals for interest and penalties, if any, related to unrecognized tax benefits in income tax expense in the consolidated statements of operations. For the year ended December 31, 2015, tax-related interest expense (income) and penalties reported in the consolidated statements of operations were $1 million and $(1) million for both the years ended December 31, 2014 and 2013. At December 31, 2015 and 2014, Chubb recorded $4 million and $9 million, respectively, in liabilities for tax-related interest and penalties in our consolidated balance sheets.

The IRS commenced its field examination of Chubb’s federal tax returns for 2010, 2011 and 2012 during October 2014, which were still ongoing at December 31, 2015. It is reasonably possible that over the next twelve months, the amount of unrecognized tax benefits may change resulting from the re-evaluation of unrecognized tax benefits arising from examinations of taxing authorities and the closing of tax statutes of limitations. With few exceptions, Chubb is no longer subject to state and local or non-U.S. income tax examinations for years before 2005.

9. Debt

	December 31		December 31
(in millions of U.S. dollars)	2015		2014		Early Redemption Option
Repurchase agreements (weighted average interest rate of 0.6% in 2015 and 0.3% in 2014)	$	1,404	$	1,402	None
Short-term debt
ACE INA senior notes:
$450 million 5.6% due May 2015	$	—	$	450	Make-whole premium plus 0.35%
$700 million 2.6% due November 2015	—		700		Make-whole premium plus 0.20%
Total short-term debt	$	—	$	1,150
Long-term debt
ACE INA senior notes:
$500 million 5.7% due February 2017	$	500	$	500	Make-whole premium plus 0.20%
$300 million 5.8% due March 2018	300		300		Make-whole premium plus 0.35%
$500 million 5.9% due June 2019	500		500		Make-whole premium plus 0.40%
$1,300 million 2.3% due November 2020	1,299		—		Make-whole premium plus 0.15%
$1,000 million 2.875% due November 2022	999		—		Make-whole premium plus 0.20%
$475 million 2.7% due March 2023	474		474		Make-whole premium plus 0.10%
$700 million 3.35% due May 2024	699		699		Make-whole premium plus 0.15%
$800 million 3.15% due March 2025	800		—		Make-whole premium plus 0.15%
$1,500 million 3.35% due May 2026	1,496		—		Make-whole premium plus 0.20%
$300 million 6.7% due May 2036	299		299		Make-whole premium plus 0.20%
$475 million 4.15% due March 2043	474		474		Make-whole premium plus 0.15%
$1,500 million 4.35% due November 2045	1,496		—		Make-whole premium plus 0.25%
ACE INA $100 million 8.875% debentures due August 2029	100		100		None
Other long-term debt (2.75% to 7.1% due December 2019 to September 2020)	11		11		None
Total long-term debt	$	9,447	$	3,357
Trust preferred securities
ACE INA capital securities due April 2030	$	309	$	309	Redemption price(1)

⁽¹⁾  Redemption price is equal to accrued and unpaid interest to the redemption date plus the greater of (i) 100 percent of the principal amount thereof, or (ii) sum of present value of scheduled payments of principal and interest on the debentures from the redemption date to April 1, 2030.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

a) Repurchase agreements

Chubb has executed repurchase agreements with certain counterparties under which Chubb agreed to sell securities and repurchase them at a future date for a predetermined price.

b) Long-term debt

In March 2015, ACE INA issued $800 million of 3.15 percent senior notes due March 2025. In May 2015, ACE INA's $450 million of 5.6 percent senior notes matured and were fully paid. In November 2015, ACE INA's $700 million of 2.6 percent senior notes matured and were fully paid.

In November 2015, ACE INA issued $5.3 billion of senior notes comprising $1.3 billion of 2.3 percent senior notes due November 2020 (2020 Notes), $1.0 billion of 2.875 percent senior notes due November 2022 (2022 Notes), $1.5 billion of 3.35 percent senior notes due May 2026 (2026 Notes), and $1.5 billion of 4.35 percent senior notes due November 2045 (2045 Notes). The proceeds from the issuance of these notes were used to finance a portion of the Chubb acquisition.

ACE INA may redeem some or all of these notes at its option one month (for the 2020 Notes), two months (for the 2022 Notes), three months (for the 2026 Notes), and six months (for the 2045 Notes) prior to the respective maturity dates at a redemption price equal to 100 percent of the principal amount of the notes plus accrued and unpaid interest. The remaining terms of the senior notes are commensurate with those of our existing senior notes as described below.

All of ACE INA’s senior notes are redeemable at any time at ACE INA's option subject to the provisions described in the table above. A “make-whole premium” is the present value of the remaining principal and interest discounted at the applicable U.S. Treasury rate. The senior notes are also redeemable at par plus accrued and unpaid interest in the event of certain changes in tax law. The debentures, subject to certain exceptions, are not redeemable before maturity.

The senior notes and debentures do not have the benefit of any sinking fund. These senior unsecured notes and debentures are guaranteed on a senior basis by Chubb Limited and they rank equally with all of Chubb's other senior obligations. They also contain customary limitations on lien provisions as well as customary events of default provisions which, if breached, could result in the accelerated maturity of such senior debt.

c) ACE INA capital securities

In March 2000, ACE Capital Trust II, a Delaware statutory business trust, publicly issued $300 million of 9.7 percent Capital Securities (the Capital Securities) due to mature in April 2030. At the same time, ACE INA purchased $9.2 million of common securities of ACE Capital Trust II. The sole assets of ACE Capital Trust II consist of $309 million principal amount of 9.7 percent Junior Subordinated Deferrable Interest Debentures (the Subordinated Debentures) issued by ACE INA due to mature in April 2030.

Distributions on the Capital Securities are payable semi-annually and may be deferred for up to ten consecutive semi-annual periods (but no later than April 1, 2030). Any deferred payments would accrue interest compounded semi-annually if ACE INA defers interest on the Subordinated Debentures. Interest on the Subordinated Debentures is payable semi-annually. ACE INA may defer such interest payments (but no later than April 1, 2030), with such deferred payments accruing interest compounded semi-annually. The Capital Securities and the ACE Capital Trust II Common Securities will be redeemed upon repayment of the Subordinated Debentures.

Chubb Limited has guaranteed, on a subordinated basis, ACE INA's obligations under the Subordinated Debentures, and distributions and other payments due on the Capital Securities. These guarantees, when taken together with Chubb's obligations under expense agreements entered into with ACE Capital Trust II, provide a full and unconditional guarantee of amounts due on the Capital Securities.

10. Commitments, contingencies, and guarantees

a) Derivative instruments

Foreign currency management

As a global company, Chubb entities transact business in multiple currencies. Our policy is to generally match assets, liabilities and required capital for each individual jurisdiction in local currency, which would include the use of derivatives discussed below. We do not hedge our net asset non-U.S. dollar capital positions; however, we do consider hedging for planned cross border transactions.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

Derivative instruments employed

Chubb maintains positions in derivative instruments such as futures, options, swaps, and foreign currency forward contracts for which the primary purposes are to manage duration and foreign currency exposure, yield enhancement, or to obtain an exposure to a particular financial market. Chubb also maintains positions in convertible securities that contain embedded derivatives. Investment derivative instruments are recorded in either Other assets (OA) or Accounts payable, accrued expenses, and other liabilities (AP), convertible bonds are recorded in Fixed maturities available for sale (FM AFS), and convertible equity securities are recorded in Equity securities (ES) in the consolidated balance sheets. These are the most numerous and frequent derivative transactions.

In addition, Chubb from time to time purchases to be announced mortgage-backed securities (TBAs) as part of its investing activities.

Under reinsurance programs covering GLBs, Chubb assumes the risk of GLBs, including GMIB and GMAB, associated with variable annuity contracts. The GMIB risk is triggered if, at the time the contract holder elects to convert the accumulated account value to a periodic payment stream (annuitize), the accumulated account value is not sufficient to provide a guaranteed minimum level of monthly income. The GMAB risk is triggered if, at contract maturity, the contract holder’s account value is less than a guaranteed minimum value. The GLB reinsurance product meets the definition of a derivative instrument. Benefit reserves in respect of GLBs are classified as Future policy benefits (FPB) while the fair value derivative adjustment is classified within AP. Chubb also generally maintains positions in exchange-traded equity futures contracts and options on equity market indices to limit equity exposure in the GMDB and GLB blocks of business. At December 31, 2015, we held no positions in option contracts on equity market indices.

All derivative instruments are carried at fair value with changes in fair value recorded in Net realized gains (losses) in the consolidated statements of operations. None of the derivative instruments are designated as hedges for accounting purposes.

The following table presents the balance sheet locations, fair values of derivative instruments in an asset or (liability) position, and notional values/payment provisions of our derivative instruments: 

		December 31, 2015							December 31, 2014
	Consolidated Balance Sheet Location	Fair Value					Notional Value/ Payment Provision		Fair Value					Notional Value/ Payment Provision
		Derivative Asset		Derivative (Liability)					Derivative Asset		Derivative (Liability)
(in millions of U.S. dollars)
Investment and embedded derivative instruments
Foreign currency forward contracts	OA / (AP)	$	7	$	(11	)	$	1,029	$	12	$	(7	)	$	1,329
Cross-currency swaps	OA / (AP)	—		—			95		—		—			95
Futures contracts on money market instruments	OA / (AP)	—		—			—		—		—			2,467
Options/Futures contracts on notes and bonds	OA / (AP)	5		(2		)	751		6		(29		)	1,636
Convertible securities(1)	FM AFS/ES	31		—			40		291		—			267
		$	43	$	(13	)	$	1,915	$	309	$	(36	)	$	5,794
Other derivative instruments
Futures contracts on equities(2)	OA / (AP)	$	—	$	(4	)	$	1,197	$	—	$	(21	)	$	1,384
Options on equity market indices(2)	OA / (AP)	—		—			—		2		—			250
Other	OA / (AP)	—		(6		)	15		—		(4		)	10
		$	—	$	(10	)	$	1,212	$	2	$	(25	)	$	1,644
GLB(3)	(AP) / (FPB)	$	—	$	(888	)	$	1,155	$	—	$	(663	)	$	675

⁽¹⁾ Includes fair value of embedded derivatives.

⁽²⁾  Related to GMDB and GLB blocks of business.

⁽³⁾  Includes both future policy benefits reserves and fair value derivative adjustment. Refer to Note 5c) for additional information. Note that the payment provision related to GLB is the net amount at risk. The concept of a notional value does not apply to the GLB reinsurance contracts.

At December 31, 2015 and 2014, derivative assets of $1 million and derivative liabilities of $34 million, respectively, included in the table above were subject to a master netting agreement. The remaining derivatives included in the table above were not subject to a master netting agreement. 

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

b) Secured borrowings

Chubb participates in a securities lending program operated by a third-party banking institution whereby certain assets are loaned to qualified borrowers and from which we earn an incremental return. At December 31, 2015 and 2014, our securities lending collateral was $1,046 million and $1,330 million, respectively, and our securities lending payable, reflecting our obligation to return the collateral plus interest, was $1,047 million and $1,331 million, respectively. The securities lending collateral can only be drawn down by Chubbin the event that the institution borrowing the securities is in default under the lending agreement. An indemnification agreement with the lending agent protects us in the event a borrower becomes insolvent or fails to return any of the securities on loan. The collateral is recorded in Securities lending collateral and the liability is recorded in Securities lending payable in the consolidated balance sheets.

The following table presents the carrying value of collateral held under securities lending agreements by investment category and remaining contractual maturity of the underlying agreements:

	Remaining contractual maturity
December 31, 2015	Overnight and Continuous
(in millions of U.S. dollars)
Collateral held under securities lending agreements:
Cash	$	424
U.S. Treasury and agency	67
Foreign	296
Corporate securities	2
Equity securities	257
	$	1,046
Gross amount of recognized liability for securities lending payable	$	1,047
Difference (1)	$	(1	)

⁽¹⁾  The carrying value of the securities lending collateral held is $1 million lower than the securities lending payable due to accrued interest recorded in the securities lending payable.

At December 31, 2015 and 2014, our repurchase agreement obligations of $1,404 million and $1,402 million, respectively, were fully collateralized. In contrast to securities lending programs, the use of cash received is not restricted for the repurchase obligations. The fair value of the underlying securities sold remains in Fixed maturities available for sale and Equity securities and the repurchase agreement obligation is recorded in Repurchase agreements in the consolidated balance sheets.

The following table presents the carrying value of collateral pledged under repurchase agreements by investment category and remaining contractual maturity of the underlying agreements:

	Remaining contractual maturity
December 31, 2015	Up to 30 Days		30 - 90 Days		Greater than 90 Days		Total
(in millions of U.S. dollars)
Collateral pledged under repurchase agreements:
Cash	$	34	$	—	$	—	$	34
U.S. Treasury and agency	6		—		231		237
Mortgage-backed securities	365		480		343		1,188
	$	405	$	480	$	574	$	1,459
Gross amount of recognized liabilities for repurchase agreements							$	1,404
Difference (1)							$	55

⁽¹⁾  Per the repurchase agreements, the amount of collateral posted is required to exceed the amount of gross liability.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

Potential risks exist in our secured borrowing transactions due to market conditions and counterparty exposure.  With collateral that we pledge, there is a risk that the collateral may not be returned at the expiration of the agreement. If the counterparty fails to return the collateral, Chubb will have free use of the borrowed funds until our collateral is returned.  In addition, we may encounter the risk that Chubb may not be able to renew outstanding borrowings with a new term or with an existing counterparty due to market conditions including a decrease in demand as well as more restrictive terms from banks due to increased regulatory and capital constraints. Should this condition occur, Chubb may seek alternative borrowing sources or reduce borrowings.  Additionally, increased margins and collateral requirements due to market conditions would increase our restricted assets as we are required to provide additional collateral to support the transaction.

The following table presents net realized gains (losses) related to derivative instrument activity in the consolidated statements of operations:

	Years Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Investment and embedded derivative instruments
Foreign currency forward contracts	$	31		$	29		$	11
All other futures contracts and options	9			(118		)	61
Convertible securities(1)	(8		)	(18		)	6
Total investment and embedded derivative instruments	$	32		$	(107	)	$	78
GLB and other derivative instruments
GLB(2)	$	(203	)	$	(217	)	$	878
Futures contracts on equities(3)	(8		)	(164		)	(555		)
Options on equity market indices(3)	(2		)	(4		)	(24		)
Other	(12		)	50			(2		)
Total GLB and other derivative instruments	$	(225	)	$	(335	)	$	297
	$	(193	)	$	(442	)	$	375

⁽¹⁾  Includes embedded derivatives.

⁽²⁾  Excludes foreign exchange gains (losses) related to GLB.

⁽³⁾  Related to GMDB and GLB blocks of business. 

c) Derivative instrument objectives

(i) Foreign currency exposure management

A foreign currency forward contract (forward) is an agreement between participants to exchange specific foreign currencies at a future date. Chubb uses forwards to minimize the effect of fluctuating foreign currencies as discussed above.

(ii) Duration management and market exposure

Futures

Futures contracts give the holder the right and obligation to participate in market movements, determined by the index or underlying security on which the futures contract is based. Settlement is made daily in cash by an amount equal to the change in value of the futures contract times a multiplier that scales the size of the contract. Exchange-traded futures contracts on money market instruments, notes and bonds are used in fixed maturity portfolios to more efficiently manage duration, as substitutes for ownership of the money market instruments, bonds and notes without significantly increasing the risk in the portfolio. Investments in futures contracts may be made only to the extent that there are assets under management not otherwise committed.

Exchange-traded equity futures contracts are used to limit exposure to a severe equity market decline, which would cause an increase in expected claims and therefore, an increase in reserves for GMDB and GLB reinsurance business.

Options

An option contract conveys to the holder the right, but not the obligation, to purchase or sell a specified amount or value of an underlying security at a fixed price. Option contracts are used in the investment portfolio as protection against unexpected shifts in interest rates, which would affect the duration of the fixed maturity portfolio. By using options in the portfolio, the overall interest rate sensitivity of the portfolio can be reduced. Option contracts may also be used as an alternative to futures contracts in the synthetic strategy as described above.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

Another use for option contracts is to limit exposure to a severe equity market decline, which would cause an increase in expected claims and therefore, an increase in reserves for GMDB and GLB reinsurance business.

The price of an option is influenced by the underlying security, expected volatility, time to expiration, and supply and demand.

The credit risk associated with the above derivative financial instruments relates to the potential for non-performance by counterparties. Although non-performance is not anticipated, in order to minimize the risk of loss, management monitors the creditworthiness of its counterparties and obtains collateral. The performance of exchange-traded instruments is guaranteed by the exchange on which they trade. For non-exchange-traded instruments, the counterparties are principally banks which must meet certain criteria according to our investment guidelines.

Cross-currency swaps

Cross-currency swaps are agreements under which two counterparties exchange interest payments and principal denominated in different currencies at a future date.  We use cross-currency swaps to reduce the foreign currency and interest rate risk by converting cash flows back into local currency.  We invest in foreign currency denominated investments to improve credit diversification and also to obtain better duration matching to our liabilities that is limited in the local currency market.

Other

Included within Other are derivatives intended to reduce potential losses which may arise from certain exposures in our insurance business.  The economic benefit provided by these derivatives is similar to purchased reinsurance.  For example, Chubb may enter into crop derivative contracts to protect underwriting results in the event of a significant decline in commodity prices. Also included within Other are certain life insurance products that meet the definition of a derivative instrument for accounting purposes. 

(iii) Convertible security investments

A convertible security is a debt instrument or preferred stock that can be converted into a predetermined amount of the issuer’s equity. The convertible option is an embedded derivative within the host instruments which are classified in the investment portfolio as either available for sale or as an equity security. Chubb purchases convertible securities for their total return and not specifically for the conversion feature.

(iv) TBA

By acquiring TBAs, we make a commitment to purchase a future issuance of mortgage-backed securities. For the period between purchase of the TBAs and issuance of the underlying security, we account for our position as a derivative in the consolidated financial statements. Chubb purchases TBAs both for their total return and for the flexibility they provide related to our mortgage-backed security strategy.

(v) GLB

Under the GLB program, as the assuming entity, Chubb is obligated to provide coverage until the expiration or maturity of the underlying deferred annuity contracts or the expiry of the reinsurance treaty. Premiums received under the reinsurance treaties are classified as premium. Expected losses allocated to premiums received are classified as Future policy benefits and valued similar to GMDB reinsurance. Other changes in fair value, principally arising from changes in expected losses allocated to expected future premiums, are classified as Net realized gains (losses). Fair value represents management’s estimate of an exit price and thus, includes a risk margin. We may recognize a realized loss for other changes in fair value due to adverse changes in the capital markets (e.g., declining interest rates and/or declining equity markets) and changes in actual or estimated future policyholder behavior (e.g., increased annuitization or decreased lapse rates) although we expect the business to be profitable. We believe this presentation provides the most meaningful disclosure of changes in the underlying risk within the GLB reinsurance programs for a given reporting period.

d) Concentrations of credit risk

Our investment portfolio is managed following prudent standards of diversification. Specific provisions limit the allowable holdings of a single issue and issuer. We believe that there are no significant concentrations of credit risk associated with our investments. Our three largest exposures by issuer at December 31, 2015, were JP Morgan Chase & Co., General Electric Company, and Goldman Sachs Group Inc. Our largest exposure by industry at December 31, 2015 was financial services.

We market our insurance and reinsurance worldwide primarily through insurance and reinsurance brokers. We assume a degree of credit risk associated with brokers with whom we transact business. No one broker or one insured accounted for more than

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

10 percent of gross written premium for the year ended December 31, 2015. For the years ended December 31, 2014 and 2013, approximately 10 percent and 11 percent, respectively, of our gross premiums written were generated from or placed by Marsh, Inc. This entity is a large, well established company and there are no indications that it is financially troubled at December 31, 2015. No other broker and no one insured or reinsured accounted for more than 10 percent of gross premiums written in the years ended December 31, 2014 and 2013.

e) Fixed maturities

At December 31, 2015, we have commitments to purchase fixed income securities of $255 million over the next several years.

f) Other investments

At December 31, 2015, included in Other investments in the consolidated balance sheet are investments in limited partnerships and partially-owned investment companies with a carrying value of $2.2 billion. In connection with these investments, we have commitments that may require funding of up to $824 million over the next several years. 

g) Letters of credit

We have a $1.5 billion unsecured operational LOC facility expiring in November 2017. We are allowed to use up to $300 million of this LOC facility as an unsecured revolving credit facility. At December 31, 2015, outstanding LOCs issued under this facility were $797 million.

This facility requires that Chubb Limited and/or certain of its subsidiaries continue to maintain certain covenants. Chubb Limited is also required to maintain a minimum consolidated net worth covenant and a maximum leverage covenant, all of which have been met at December 31, 2015.

h) Legal proceedings

Our insurance subsidiaries are subject to claims litigation involving disputed interpretations of policy coverages and, in some jurisdictions, direct actions by allegedly-injured persons seeking damages from policyholders. These lawsuits, involving claims on policies issued by our subsidiaries which are typical to the insurance industry in general and in the normal course of business, are considered in our loss and loss expense reserves. In addition to claims litigation, we are subject to lawsuits and regulatory actions in the normal course of business that do not arise from or directly relate to claims on insurance policies. This category of business litigation typically involves, among other things, allegations of underwriting errors or misconduct, employment claims, regulatory activity, or disputes arising from our business ventures. In the opinion of management, our ultimate liability for these matters could be, but we believe is not likely to be, material to our consolidated financial condition and results of operations.

i) Lease commitments

We lease office space and equipment under operating leases which expire at various dates through 2033. Rent expense was $126 million, $127 million, and $128 million for the years ended December 31, 2015, 2014, and 2013, respectively. Future minimum lease payments under the leases are expected to be as follows:

For the year ending December 31
(in millions of U.S. dollars)
2016	$	111
2017	93
2018	72
2019	54
2020	43
Thereafter	86
Total minimum future lease commitments	$	459

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

11. Shareholders’ equity

a) Common Shares

All of Chubb’s Common Shares are authorized under Swiss corporate law. Though the par value of Common Shares is stated in Swiss francs, Chubb continues to use U.S. dollars as its reporting currency for preparing the consolidated financial statements. Under Swiss corporate law, we are generally prohibited from issuing Common Shares below their par value. If there were a need to raise common equity at a time when the trading price of Chubb's Common Shares is below par value, we would need in advance to obtain shareholder approval to decrease the par value of the Common Shares.

Dividend approval

At our May 2013 annual general meeting, our shareholders approved an annual dividend for the following year of $2.04 per share, payable in four quarterly installments of $0.51 per share after the annual general meeting in the form of a distribution by way of a par value reduction. At the January 10, 2014 extraordinary general meeting, our shareholders approved a resolution to increase our quarterly dividend from $0.51 per share to $0.63 per share for the final two quarterly installments (made on January 31, 2014 and April 17, 2014) that had been earlier approved at our 2013 annual general meeting. The $0.12 per share increase for each installment was distributed from capital contribution reserves (Additional paid-in capital), a subaccount of legal reserves, and transferred to free reserves (Retained earnings) for payment, while the existing $0.51 per share was distributed by way of a par value reduction.

At our May 2014 annual general meeting, our shareholders approved an annual dividend for the following year of $2.60 per share, payable in four quarterly installments of $0.65 per share after the annual general meeting in the form of a distribution by way of a par value reduction.

At our May 2015 annual general meeting, our shareholders approved an annual dividend for the following year of up to $2.68 per share, expected to be paid in four quarterly installments of $0.67 per share after the annual general meeting by way of a distribution from capital contribution reserves, transferred to free reserves for payment. The Board of Directors (Board) will determine the record and payment dates at which the annual dividend may be paid, and is authorized to abstain from distributing a dividend in its discretion, until the date of the 2016 annual general meeting. The first three quarterly installments, each of $0.67 per share, have been distributed by the Board as expected.

Dividend distributions

Under Swiss corporate law, dividends, including distributions through a reduction in par value (par value reduction), must be stated in Swiss francs though dividend payments are made by Chubb in U.S. dollars. Dividend distributions following Chubb's redomestication to Switzerland have generally been made by way of par value reduction (under the methods approved by our shareholders at our annual general meetings) and had the effect of reducing par value per Common Share each time a dividend was distributed. We may also issue dividends without subjecting them to withholding tax by way of distributions from capital contribution reserves and payment out of free reserves. We employed this method of dividends to effect our dividend increase that was approved by our shareholders on January 10, 2014, and during portions of 2015, as noted above.

The following table presents dividend distributions per Common Share in Swiss francs (CHF) and U.S. dollars (USD):

	Years Ended December 31
		2015			2014			2013
	CHF	USD		CHF	USD		CHF	USD
Dividends - par value reduction	0.62	$	0.65	2.27	$	2.46	1.85	$	2.02
Dividends - distributed from capital contribution reserves	1.94	2.01		0.20	0.24		—	—
Total dividend distributions per common share	2.56	$	2.66	2.47	$	2.70	1.85	$	2.02

Par value reductions have been reflected as such through Common Shares in the consolidated statements of shareholders' equity and had the effect of reducing par value per Common Share to CHF 24.15 at December 31, 2015.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

b) Shares issued, outstanding, authorized, and conditional

	Years Ended December 31
	2015		2014		2013
Shares issued, beginning and end of year	342,832,412		342,832,412		342,832,412
Common Shares in treasury, end of year (at cost)	(18,268,971	)	(14,172,726	)	(3,038,477	)
Shares issued and outstanding, end of year	324,563,441		328,659,686		339,793,935
Common Shares issued to employee trust
Balance, beginning of year	(9,467	)	(9,467	)	(9,467	)
Shares redeemed	3,667		—		—
Balance, end of year	(5,800	)	(9,467	)	(9,467	)

Increases in Common Shares in treasury are due to open market repurchases of Common Shares and the surrender of Common Shares to satisfy tax withholding obligations in connection with the vesting of restricted stock and the forfeiture of unvested restricted stock. Decreases in Common Shares in treasury are principally due to grants of restricted stock, exercises of stock options, and purchases under the Employee Stock Purchase Plan (ESPP).

Common Shares issued to employee trust are issued by Chubb to a rabbi trust for deferred compensation obligations as discussed in Note 11 e) below.

Authorized share capital for general purposes

The Board has shareholder-approved authority as set forth in the Articles of Association to increase for general purposes Chubb's share capital from time to time until October 22, 2017, by the issuance of up to 28,048,548 fully paid up Common Shares, with a par value equal to the par value of Chubb's Common Shares as set forth in the Articles of Association at the time of any such issuance. This authorized share capital reflects the balance remaining after the issuance of approximately 137 million shares in connection with the acquisition of The Chubb Corporation on January 14, 2016.

Conditional share capital for bonds and similar debt instruments

Chubb's share capital may be increased through the issuance of a maximum of 33,000,000 fully paid up Common Shares (with a par value of CHF 24.15 as of December 31, 2015) through the exercise of conversion and/or option or warrant rights granted in connection with bonds, notes, or similar instruments, issued or to be issued by Chubb, including convertible debt instruments.

Conditional share capital for employee benefit plans

Chubb's share capital may be increased through the issuance of a maximum of 25,410,929 fully paid up Common Shares (with a par value of CHF 24.15 as of December 31, 2015) in connection with the exercise of option rights granted to any employee of Chubb, and any consultant, director, or other person providing services to Chubb.

c) Chubb Limited securities repurchases

On November 21, 2013, the Board announced authorization of a share repurchase program of up to $2.0 billion of Chubb's Common Shares through December 31, 2014.  This $2.0 billion authorization replaced the previous authorizations which expired on December 31, 2013.

On November 24, 2014, the Board announced authorization of a share repurchase program of $1.5 billion of Chubb's Common Shares for the period January 1, 2015 through December 31, 2015 to replace the November 2013 authorization when it expired on December 31, 2014.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

The following table presents repurchases of Chubb's Common Shares conducted in a series of open market transactions under the Board authorizations:

	Years Ended December 31
(in millions of U.S. dollars, except share data)	2015		2014		2013
Number of shares repurchased	6,677,663		13,982,358		3,266,531
Cost of shares repurchased	$	734	$	1,449	$	290

Chubb repurchased these Common Shares as part of an overall capital management strategy and to partially offset potential dilution from the exercise of stock options and the granting of restricted stock under share-based compensation plans. There are no outstanding repurchase authorizations at December 31, 2015.

d) General restrictions

The holders of the Common Shares are entitled to receive dividends as approved by the shareholders. Holders of Common Shares are allowed one vote per share provided that, if the controlled shares of any shareholder constitute ten percent or more of the outstanding Common Shares of Chubb, only a fraction of the vote will be allowed so as not to exceed ten percent in aggregate. Entry of acquirers of Common Shares as shareholders with voting rights in the share register may be refused if it would confer voting rights with respect to ten percent or more of the registered share capital recorded in the commercial register.

e) Deferred compensation obligation

Chubb maintains rabbi trusts for deferred compensation plans principally for employees and former directors. The shares issued by Chubb to the rabbi trusts in connection with deferrals of share compensation are classified in shareholders' equity and accounted for at historical cost in a manner similar to Common Shares in treasury. Changes in the fair value of the shares underlying the obligations are recorded in Accounts payable, accrued expenses, and other liabilities in the consolidated balance sheets and the related expense or income is recorded in Administrative expenses in the consolidated statements of operations.

The rabbi trusts also hold other assets, such as fixed maturities, equity securities, and life insurance policies. The assets of the rabbi trusts are consolidated with Chubb's assets in the consolidated balance sheets. Assets held by the trust and the associated obligations are reported at fair value in Other investments and Accounts payable, accrued expenses, and other liabilities, respectively, in the consolidated balance sheets, with changes in fair value reflected as a corresponding increase or decrease to Other (income) expense in the consolidated statements of operations. However, life insurance policies assets and obligations are reported at cash surrender value.

12. Share-based compensation

Chubb has share-based compensation plans which currently provide the Board the ability to grant awards of stock options, restricted stock, and restricted stock units to its employees, consultants, and members of the Board.

Chubb principally issues restricted stock grants and stock options on a graded vesting schedule. Chubb recognizes compensation cost for restricted stock and stock option grants with only service conditions that have a graded vesting schedule on a straight-line basis over the requisite service period for each separately vesting portion of the award as if the award was, in-substance, multiple awards. We incorporate an estimate of future forfeitures (6.5 percent assumption used for grants made in 2015, 2014, and 2013) in determining compensation cost for both grants of restricted stock and stock options.

During 2004, we established the ACE Limited 2004 Long-Term Incentive Plan (the 2004 LTIP), which replaced our prior incentive plans except for outstanding awards. The 2004 LTIP will continue in effect until terminated by the Board. Under the 2004 LTIP, Common Shares of Chubb are authorized to be issued pursuant to awards made as stock options, stock appreciation rights, performance shares, performance units, restricted stock, and restricted stock units.

Chubb generally grants restricted stock and restricted stock units with a 4-year vesting period, which vest in equal annual installments over the respective vesting period. The restricted stock is granted at market close price on the day of grant. Each restricted stock unit represents our obligation to deliver to the holder one Common Share upon vesting.

In May 2013, our shareholders approved an increase of eight million shares authorized to be issued under the 2004 LTIP, bringing the total shares authorized (i.e., for grant since its inception) to the sum of: (i) 38,600,000 common shares; and (ii) any shares that are represented by awards granted under the prior plans that are forfeited, expired, or are canceled after the

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

effective date of the 2004 LTIP, without delivery of shares or which result in the forfeiture of the shares back to Chubb to the extent that such shares would have been added back to the reserve under the terms of the applicable prior plan. At December 31, 2015, a total of 4,617,796 shares remain available for future issuance under the 2004 LTIP.

Under the 2004 LTIP, 4,500,000 shares are authorized to be issued under the ESPP.  At December 31, 2015, a total of 934,243 shares remain available for issuance under the ESPP.

Chubb generally issues Common Shares for the exercise of stock options, restricted stock, and purchases under the ESPP from un-issued reserved shares (conditional share capital) and Common Shares in treasury.

The following table presents pre-tax and after-tax share-based compensation expense:

	Years Ended December 31
(in millions of U.S. dollars)	2015		2014		2013
Stock options and shares issued under ESPP:
Pre-tax	$	31	$	28	$	24
After-tax (1)	$	21	$	19	$	18
Restricted stock:
Pre-tax	$	143	$	128	$	153
After-tax	$	84	$	75	$	89

⁽¹⁾  Excludes windfall tax benefit for share-based compensation recognized as a direct adjustment to Additional paid-in capital of $26 million, $28 million and $36 million for the years ended December 31, 2015, 2014 and 2013, respectively.

Unrecognized compensation expense related to the unvested portion of Chubb's employee share-based awards was $175 million at December 31, 2015, and is expected to be recognized over a weighted-average period of approximately 1 year.

Stock options

The 2004 LTIP permits grants of both incentive and non-qualified stock options principally at an option price per share equal to the grant date fair value of Chubb's Common Shares. Stock options are generally granted with a 3-year vesting period and a 10-year term. Stock options vest in equal annual installments over the respective vesting period, which is also the requisite service period.

Chubb's 2015 share-based compensation expense includes a portion of the cost related to the 2012 through 2015 stock option grants. Stock option fair value was estimated on the grant date using the Black-Scholes option-pricing model that uses the weighted-average assumptions noted below:

	Years Ended December 31
	2015		2014		2013
Dividend yield	2.3	%	2.7	%	2.4	%
Expected volatility	21.0	%	25.2	%	27.8	%
Risk-free interest rate	1.7	%	1.7	%	1.0	%
Expected life	5.8 years		5.8 years		5.8 years

The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant. The expected life (estimated period of time from grant to exercise date) was estimated using the historical exercise behavior of employees. Expected volatility was calculated as a blend of (a) historical volatility based on daily closing prices over a period equal to the expected life assumption, (b) long-term historical volatility based on daily closing prices over the period from Chubb's initial public trading date through the most recent quarter, and (c) implied volatility derived from Chubb's publicly traded options.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

The following table presents a roll-forward of Chubb's stock options:

(Intrinsic Value in millions of U.S. dollars)	Number of Options		Weighted-Average Exercise Price		Weighted-Average Fair Value		Total Intrinsic Value
Options outstanding, December 31, 2012	9,449,659		$	55.03
Granted	1,821,063		$	85.41	$	17.29
Exercised	(1,658,671	)	$	48.17			$	70
Forfeited	(115,195	)	$	72.50
Options outstanding, December 31, 2013	9,496,856		$	61.84
Granted	1,782,903		$	96.77	$	18.00
Exercised	(1,511,948	)	$	54.84			$	73
Forfeited	(143,825	)	$	84.52
Options outstanding, December 31, 2014	9,623,986		$	69.06
Granted	1,892,641		$	114.78	$	18.49
Exercised	(1,457,580	)	$	60.88			$	72
Forfeited	(205,551	)	$	100.25
Options outstanding, December 31, 2015	9,853,496		$	78.40			$	379
Options exercisable, December 31, 2015	6,424,800		$	64.45			$	337

The weighted-average remaining contractual term was 6.0 years for stock options outstanding and 4.7 years for stock options exercisable at December 31, 2015. Cash received from the exercise of stock options for the year ended December 31, 2015 was $86 million.

Restricted stock and restricted stock units

Grants of restricted stock and restricted stock units granted under the 2004 LTIP typically have a 4-year vesting period, based on a graded vesting schedule. Chubb grants performance-based restricted stock to certain executives that vest based on tangible book value (shareholders' equity less goodwill and intangible assets) per share growth compared to a defined group of peer companies. The performance-based stock awards comprise target awards which have four installments that vest annually based on the performance criteria, and premium awards, which are earned only if tangible book value per share growth over the cumulative 4-year period after the grant of the associated target awards exceeds a higher threshold compared to our peer group. Shares representing target awards are issued when the performance award is approved. They are subject to forfeiture if applicable performance criteria are not met. For awards granted prior to February 2014, shares representing premium awards were not issued at the time the target award was approved. Rather, they were subject to issuance following the 4-year performance period, if and to the extent the premium awards were earned. For awards granted in February 2014 and thereafter, premium awards have been issued subject to vesting if actually earned or forfeited if not earned at the end of the four-year performance period. Chubb also grants restricted stock awards to non-management directors which vest at the following year's annual general meeting. The restricted stock is granted at market close price on the grant date. Each restricted stock unit represents our obligation to deliver to the holder one Common Share upon vesting. Chubb's 2015 share-based compensation expense includes a portion of the cost related to the restricted stock granted in the years 2011 through 2015.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

The following table presents a roll-forward of our restricted stock awards. Included in the roll-forward below are 24,945 restricted stock awards, 25,339 restricted stock awards, and 20,969 restricted stock awards that were granted to non-management directors during the years ended December 31, 2015, 2014, and 2013, respectively:

	Service-based Restricted Stock Awards				Performance-based Restricted Stock Awards
	Number of Shares		Weighted-Average Grant-Date Fair Value		Number of Shares		Weighted-Average Grant-Date Fair Value
Unvested restricted stock, December 31, 2012	4,015,732		$	59.51	239,115		$	59.94
Granted	1,347,679		$	85.61	196,806		$	89.90
Vested	(1,715,414	)	$	54.97	(236,080	)	$	75.29
Forfeited	(136,307	)	$	67.68	(3,344	)	$	69.39
Unvested restricted stock, December 31, 2013	3,511,690		$	71.42	196,497		$	71.35
Granted	1,295,734		$	97.04	374,202		$	98.31
Vested	(1,468,894	)	$	68.00	(192,009	)	$	85.39
Forfeited	(145,012	)	$	81.73	—		$	—
Unvested restricted stock, December 31, 2014	3,193,518		$	82.91	378,690		$	90.87
Granted	1,124,143		$	114.28	326,860		$	113.29
Vested	(1,299,895	)	$	79.49	(110,340	)	$	98.70
Forfeited	(192,009	)	$	95.54	—		$	—
Unvested restricted stock, December 31, 2015	2,825,757		$	96.10	595,210		$	101.73

During the years ended December 31, 2015, 2014, and 2013, Chubb awarded 293,822 restricted stock units, 300,511 restricted stock units, and 271,004 restricted stock units, respectively, to employees and officers each with a weighted-average grant date fair value per share of $114.71, $97.66, and $85.44, respectively. At December 31, 2015, there were 663,412 unvested restricted stock units.

Prior to 2009, Chubb granted restricted stock units with a 1-year vesting period to non-management directors. Delivery of Common Shares on account of these restricted stock units to non-management directors is deferred until after the date of the non-management directors' termination from the Board. At December 31, 2015, there were 145,751 deferred restricted stock units.

ESPP

The ESPP gives participating employees the right to purchase Common Shares through payroll deductions during consecutive subscription periods at a purchase price of 85 percent of the fair value of a Common Share on the exercise date (Purchase Price). Annual purchases by participants are limited to the number of whole shares that can be purchased by an amount equal to ten percent of the participant's compensation or $25,000, whichever is less. The ESPP has two six-month subscription periods each year, the first of which runs between January 1 and June 30 and the second of which runs between July 1 and December 31. The amounts collected from participants during a subscription period are used on the exercise date to purchase full shares of Common Shares. An exercise date is generally the last trading day of a subscription period. The number of shares purchased is equal to the total amount, at the exercise date, collected from the participants through payroll deductions for that subscription period, divided by the Purchase Price, rounded down to the next full share. Participants may withdraw from an offering before the exercise date and obtain a refund of amounts withheld through payroll deductions. Pursuant to the provisions of the ESPP, during the years ended December 31, 2015, 2014, and 2013, employees paid $18 million, $17 million, and $14 million to purchase 197,442 shares, 181,901 shares, and 175,437 shares, respectively.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

13. Pension plans

Chubb provides pension benefits to eligible employees and their dependents through various defined contribution plans and defined benefit plans sponsored by Chubb. The defined contribution plans include a capital accumulation plan (401(k)) in the U.S. At December 31, 2015, the defined benefit plans consist of various plans offered in certain jurisdictions primarily outside of the U.S. and Bermuda.

Defined contribution plans (including 401(k))

Under these plans, employees' contributions may be supplemented by Chubb matching contributions based on the level of employee contribution. These contributions are invested at the election of each employee in one or more of several investment portfolios offered by a third-party investment advisor. Expenses for these plans totaled $117 million, $119 million, and $111 million for the years ended December 31, 2015, 2014, and 2013, respectively.

Defined benefit plans

We maintain non-contributory defined benefit plans that cover certain employees, principally located in Europe, Asia, and Mexico. We also provide a defined benefit plan to certain U.S.-based employees as a result of our acquisition of Penn Millers. We account for pension benefits using the accrual method. Benefits under these plans are based on employees' years of service and compensation during final years of service. All underlying defined benefit plans are subject to periodic actuarial valuation by qualified local actuarial firms using actuarial models in calculating the pension expense and liability for each plan. We use December 31 as the measurement date for our defined benefit pension plans.

Components of the funded status of the pensions (included in Accounts payable, accrued expenses, and other liabilities in the consolidated balance sheets):

	December 31		December 31
(in millions of U.S. dollars)	2015		2014
Fair value of plan assets	$	573	$	588
Projected benefit obligation	569		594
Funded status, end of year	$	4	$	(6	)

At December 31, 2015, the defined benefit pension plan contribution for 2016 is expected to be $4 million. The estimated net actuarial loss for the defined benefit pension plans that will be amortized from AOCI into net benefit costs over the next year is $2 million.

Benefit payments were $29 million and $24 million for the years ended December 31, 2015 and 2014, respectively. Expected future payments are as follows:

For the year ending December 31
(in millions of U.S. dollars)
2016	$	20
2017	20
2018	23
2019	24
2020	24
2021–2025	126

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

14. Other (income) expense

	Year Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Equity in net (income) loss of partially-owned entities	$	(113	)	$	(231	)	$	(119	)
(Gains) losses from fair value changes in separate account assets	19			(2		)	(16		)
Federal excise and capital taxes	19			20			24
Acquisition-related costs (1)	9			15			4
Other	15			8			27
Other (income) expense	$	(51	)	$	(190	)	$	(80	)

⁽¹⁾ Excludes integration costs related to the Chubb acquisition.

Other (income) expense includes equity in net (income) loss of partially-owned entities which includes our share of net (income) loss related to partially-owned investment companies (private equity) and partially-owned insurance companies. Also included in Other (income) expense are (Gains) losses from fair value changes in separate account assets that do not qualify for separate account reporting under GAAP. The offsetting movement in the separate account liabilities is included in Policy benefits in the consolidated statements of operations. Certain federal excise and capital taxes incurred as a result of capital management initiatives are included in Other (income) expense as these are considered capital transactions and are excluded from underwriting results.

Beginning in 2015, amortization of intangible assets are excluded from Other (income) expense and disclosed separately in the consolidated statements of operations. Prior year amounts have been reclassified to conform to the current year presentation.

15. Chubb integration expenses

Chubb integration expenses were $33 million for the year ended December 31, 2015 and include legal and professional fees and all external costs directly related to the integration activities of the Chubb acquisition.

16. Segment information

Through December 31, 2015, Chubb operated through five business segments: Insurance – North American P&C, Insurance – North American Agriculture, Insurance – Overseas General, Global Reinsurance, and Life. These segments distribute their products through various forms of brokers, agencies, and direct marketing programs. All business segments have established relationships with reinsurance intermediaries.

The Insurance – North American P&C segment comprises our operations in the U.S., Canada, and Bermuda. This segment includes our retail divisions: ACE USA (including ACE Canada), ACE Commercial Risk Services, and ACE Private Risk Services, which includes the Fireman's Fund high net worth personal lines business acquired effective April 1, 2015; our wholesale and specialty divisions: ACE Westchester and ACE Bermuda; and various run-off operations, including Brandywine. ACE USA is the North American retail operating division which provides a broad array of traditional and specialty P&C, A&H, and risk management products and services to a diverse group of North America commercial and non-commercial enterprises and consumers. ACE Commercial Risk Services addresses the insurance needs of small and micro-sized businesses in North America by delivering a broad array of specialty product solutions for targeted industries that lend themselves to technology-assisted underwriting. ACE Private Risk Services provides high-value personal lines coverages for high net worth individuals and families in North America. ACE Westchester focuses on the North American wholesale distribution of excess and surplus lines property, casualty, environmental, professional liability, inland marine products and product recall coverages. ACE Bermuda provides commercial insurance products on an excess basis mainly to a global client base targeting Fortune 1000 companies and covering exposures that are generally low in frequency and high in severity including excess liability, D&O, professional liability, property insurance, and political risk, the latter being written by Sovereign Risk Insurance Ltd., a wholly-owned managing agent. The run-off operations do not actively sell insurance products but are responsible for the management of certain existing policies and settlement of related claims.

The Insurance – North American Agriculture segment comprises our North American based businesses that provide a variety of coverages in the U.S. and Canada including crop insurance, primarily Multiple Peril Crop Insurance (MPCI) and crop-hail through Rain and Hail Insurance Services, Inc. as well as farm and ranch, and specialty P&C commercial insurance products

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

and services through our ACE Agribusiness unit. The MPCI program is offered in conjunction with the U.S. Department of Agriculture.

The Insurance – Overseas General segment comprises ACE International, ACE Global Markets (AGM), and the international supplemental A&H business of Combined Insurance. ACE International comprises our retail commercial P&C, A&H, and personal lines businesses serving territories outside the U.S., Bermuda, and Canada. ACE International maintains a presence in every major insurance market in the world and is organized geographically along product lines that provide dedicated underwriting focus to customers. ACE International has five regions of operations: ACE Europe, ACE Asia Pacific, ACE Eurasia and Africa, ACE Far East, and ACE Latin America. ACE International writes a variety of insurance products including P&C, professional lines (directors and officers and errors and omissions), marine, energy, aviation, political risk, specialty consumer-oriented products, and A&H (principally accident and supplemental health). AGM, our London-based international specialty and excess and surplus lines business, includes Syndicate 2488, a wholly-owned ACE syndicate. AGM offers products through its parallel distribution network via ACE European Group Limited (AEGL) and Syndicate 2488. Chubb provides funds at Lloyd's to support underwriting by Syndicate 2488, which is managed by ACE Underwriting Agencies Limited. AGM uses Syndicate 2488 to underwrite P&C business on a global basis through Lloyd's worldwide licenses. AGM uses AEGL to underwrite similar classes of business through its network of U.K. and European licenses, and in the U.S. where it is eligible to write excess and surplus lines business. The reinsurance operation of AGM is included in the Global Reinsurance segment. Combined Insurance distributes a wide range of supplemental A&H products.

The Global Reinsurance segment represents Chubb's reinsurance operations comprising ACE Tempest Re Bermuda, ACE Tempest Re USA, ACE Tempest Re International, and ACE Tempest Re Canada. The Global Reinsurance segment also includes AGM's reinsurance operations. These divisions provide a broad range of traditional and specialty reinsurance products including property catastrophe, casualty, and property reinsurance coverages to a diverse array of primary P&C insurers.

The Life segment includes Chubb's international life operations (ACE Life), ACE Tempest Life Re (ACE Life Re), and the North American supplemental A&H and life business of Combined Insurance.ACE Life provides a broad portfolio of protection and savings products including whole life, endowment plans, individual term life, group term life, group medical, personal accident, credit life, universal life and unit linked contracts through multiple distribution channels primarily in emerging markets including: Egypt, Hong Kong, Indonesia, South Korea, Taiwan, Thailand, and Vietnam; also throughout Latin America, selectively in Europe, and China through a non-consolidated joint venture insurance company. ACE Life Re helps clients (ceding companies) manage mortality, morbidity, and lapse risks embedded in their books of business. ACE Life Re's core business is a Bermuda-based operation which provides reinsurance to primary life insurers, focusing on guarantees included in certain fixed and variable annuity products and also on more traditional mortality reinsurance protection. ACE Life Re's U.S.-based traditional life reinsurance operation was discontinued for new business in January 2010. Since 2007, ACE Life Re has not quoted on new opportunities in the variable annuity reinsurance marketplace. Combined Insurance distributes specialty supplemental A&H and life insurance products targeted to middle income consumers and businesses in the U.S. and Canada.

Corporate includes the results of Chubb’s non-insurance subsidiaries, including Chubb Limited, ACE Group Management and Holdings Ltd., and ACE INA Holdings, Inc.  Corporate results consist primarily of interest expense, corporate staff expenses, Chubb integration expenses and other expenses not attributable to specific reportable segments, and intersegment eliminations.

For segment reporting purposes, certain items have been presented in a different manner below than in the consolidated financial statements. Management uses underwriting income as the main measure of segment performance. Chubb calculates underwriting income by subtracting Losses and loss expenses, Policy benefits, Policy acquisition costs, and Administrative expenses from Net premiums earned. For the Insurance – North American Agriculture segment, management includes gains and losses on crop derivatives as a component of underwriting income. For 2015, underwriting income in our Insurance – North American Agriculture segment was $197 million. This amount includes $9 million of realized losses related to crop derivatives which are included in Net realized gains (losses) below. For the Life segment, management includes Net investment income and (Gains) losses from fair value changes in separate account assets that do not qualify for separate account reporting under GAAP as components of Life underwriting income. For example, for 2015, Life underwriting income of $282 million includes Net investment income of $265 millionand losses from fair value changes in separate account assets of $19 million.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

The following tables present the Statement of Operations by segment:

For the Year Ended December 31, 2015 (in millions of U.S. dollars)	Insurance – North American P&C			Insurance – North American Agriculture			Insurance – Overseas General			Global Reinsurance			Life			Corporate			Chubb Consolidated
Net premiums written	$	6,907		$	1,346		$	6,634		$	828		$	1,998		$	—		$	17,713
Net premiums earned	6,582			1,364			6,471			849			1,947			—			17,213
Losses and loss expenses	4,450			1,088			3,052			290			601			3			9,484
Policy benefits	—			—			—			—			543			—			543
Policy acquisition costs	600			69			1,581			214			476			1			2,941
Administrative expenses	748			1			997			49			291			184			2,270
Underwriting income (loss)	784			206			841			296			36			(188		)	1,975
Net investment income	1,056			23			534			300			265			16			2,194
Net realized gains (losses) including OTTI	(108		)	(8		)	(38		)	(32		)	(229		)	(5		)	(420		)
Interest expense	2			—			8			5			5			280			300
Other (income) expense:
(Gains) losses from fair value changes in separate account assets	—			—			—			—			19			—			19
Other	(29		)	1			(16		)	(6		)	(39		)	19			(70		)
Amortization of intangible assets	78			30			61			—			2			—			171
Chubb integration expenses	—			—			—			—			—			33			33
Income tax expense (benefit)	316			40			232			26			30			(182		)	462
Net income (loss)	$	1,365		$	150		$	1,052		$	539		$	55		$	(327	)	$	2,834

For the Year Ended December 31, 2014 (in millions of U.S. dollars)	Insurance – North American P&C			Insurance – North American Agriculture		Insurance – Overseas General			Global Reinsurance			Life			Corporate			Chubb Consolidated
Net premiums written	$	6,263		$	1,590	$	6,999		$	935		$	2,012		$	—		$	17,799
Net premiums earned	6,107			1,526		6,805			1,026			1,962			—			17,426
Losses and loss expenses	4,086			1,351		3,189			431			589			3			9,649
Policy benefits	—			—		—			—			517			—			517
Policy acquisition costs	634			81		1,625			257			478			—			3,075
Administrative expenses	678			9		1,026			54			285			193			2,245
Underwriting income (loss)	709			85		965			284			93			(196		)	1,940
Net investment income	1,085			26		545			316			268			12			2,252
Net realized gains (losses) including OTTI	(67		)	54		(78		)	(29		)	(383		)	(4		)	(507		)
Interest expense	9			—		6			4			11			250			280
Other (income) expense:
(Gains) losses from fair value changes in separate account assets	—			—		—			—			(2		)	—			(2		)
Other	(101		)	2		(63		)	(54		)	(1		)	29			(188		)
Amortization of intangible assets	—			31		74			—			3			—			108
Income tax expense (benefit)	306			33		378			38			46			(167		)	634
Net income (loss)	$	1,513		$	99	$	1,037		$	583		$	(79	)	$	(300	)	$	2,853

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

For the Year Ended December 31, 2013 (in millions of U.S. dollars)	Insurance – North American P&C			Insurance – North American Agriculture		Insurance – Overseas General			Global Reinsurance			Life			Corporate			Chubb Consolidated
Net premiums written	$	5,915		$	1,627	$	6,520		$	991		$	1,972		$	—		$	17,025
Net premiums earned	5,721			1,678		6,333			976			1,905			—			16,613
Losses and loss expenses	3,776			1,524		3,062			396			582			8			9,348
Policy benefits	—			—		—			—			515			—			515
Policy acquisition costs	597			53		1,453			197			358			1			2,659
Administrative expenses	601			11		1,008			50			343			198			2,211
Underwriting income (loss)	747			90		810			333			107			(207		)	1,880
Net investment income	1,021			26		539			280			251			27			2,144
Net realized gains (losses) including OTTI	72			1		18			53			360			—			504
Interest expense	5			1		5			5			15			244			275
Other (income) expense:
(Gains) losses from fair value changes in separate account assets	—			—		—			—			(16		)	—			(16		)
Other	(58		)	—		(21		)	(19		)	10			24			(64		)
Amortization of intangible assets	—			32		60			—			3			—			95
Income tax expense (benefit)	347			20		222			36			34			(179)			480
Net income (loss)	$	1,546		$	64	$	1,101		$	644		$	672		$	(269	)	$	3,758

Underwriting assets are reviewed in total by management for purposes of decision-making. Other than goodwill and other intangible assets, Chubb does not allocate assets to its segments.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

The following table presents net premiums earned for each segment by product:

(in millions of U.S. dollars)	Property & All Other		Casualty		Life, Accident & Health		Chubb Consolidated
For the Year Ended December 31, 2015
Insurance – North American P&C	$	1,931	$	4,232	$	419	$	6,582
Insurance – North American Agriculture	1,364		—		—		1,364
Insurance – Overseas General	2,868		1,537		2,066		6,471
Global Reinsurance	423		426		—		849
Life	—		—		1,947		1,947
	$	6,586	$	6,195	$	4,432	$	17,213
For the Year Ended December 31, 2014
Insurance – North American P&C	$	1,662	$	4,032	$	413	$	6,107
Insurance – North American Agriculture	1,526		—		—		1,526
Insurance – Overseas General	2,948		1,573		2,284		6,805
Global Reinsurance	551		475		—		1,026
Life	—		—		1,962		1,962
	$	6,687	$	6,080	$	4,659	$	17,426
For the Year Ended December 31, 2013
Insurance – North American P&C	$	1,489	$	3,847	$	385	$	5,721
Insurance – North American Agriculture	1,678		—		—		1,678
Insurance – Overseas General	2,672		1,479		2,182		6,333
Global Reinsurance	543		433		—		976
Life	—		—		1,905		1,905
	$	6,382	$	5,759	$	4,472	$	16,613

The following table presents net premiums earned by geographic region. Allocations have been made on the basis of location of risk:

	North America				Asia  Pacific/Far East		Latin America
Years Ended December 31			Europe(1)
2015	60	%	15	%	15	%	10	%
2014	58	%	16	%	16	%	10	%
2013	58	%	17	%	16	%	9	%

⁽¹⁾ Europe includes Eurasia and Africa region.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

17. Earnings per share

	Years Ended December 31
(in millions of U.S. dollars, except share and per share data)	2015		2014		2013
Numerator:
Net income	$	2,834	$	2,853	$	3,758
Denominator:
Denominator for basic earnings per share:
Weighted-average shares outstanding	325,589,361		335,609,899		340,906,490
Denominator for diluted earnings per share:
Share-based compensation plans	3,246,017		3,376,388		3,241,085
Weighted-average shares outstanding       and assumed conversions	328,835,378		338,986,287		344,147,575
Basic earnings per share	$	8.71	$	8.50	$	11.02
Diluted earnings per share	$	8.62	$	8.42	$	10.92
Potential anti-dilutive share conversions	1,601,668		1,024,788		1,031,297

Excluded from weighted-average shares outstanding and assumed conversions is the impact of securities that would have been anti-dilutive during the respective years.

18. Related party transactions

Starr Technical Risks Agency, Inc. and its affiliates (Starr)

We have agency agreements with Starr, an indirect wholly-owned subsidiary of Starr International Company, Inc. whose chairman is related to a member of our senior management team. Our Board reviewed and approved our arrangements with Starr, and they also review and approve aggregate amounts paid to Starr on a regular basis. Under these agreements, we secure the ability to sell our insurance policies through Starr as one of our non-exclusive agents for writing policies, contracts, binders, or agreements of insurance or reinsurance. For the years ended December 31, 2015, 2014, and 2013 we generated $305 million, $314 million, and $307 million, respectively, in gross premiums written through these agreements. In addition, we ceded $78 million, $84 million, and $86 million to Starr as part of our reinsurance program on the underlying business for the years ended December 31, 2015, 2014, and 2013, respectively. We paid net commissions of $41 million, $43 million, and $42 million and incurred net Losses and loss expenses of $137 million, $91 million, and $70 million, respectively, for the years ended December 31, 2015, 2014, and 2013, under these agreements. 

The agency agreements also contains a profit-sharing arrangement based on loss ratios, triggered if Starr underwrites a minimum of $20 million of annual program business net written premiums on our behalf. No profit share commission has been payable yet.

Reinsurance recoverable on losses and loss expenses due from Starr was $112 million and $101 million, respectively, and the amount of ceded reinsurance premium payable included in Insurance and reinsurance balances payable in the consolidated balance sheet was $18 million and $21 million, respectively.

The ACE Foundation – Bermuda

The ACE Foundation is an unconsolidated not-for-profit organization whose primary purpose is to fund charitable causes in Bermuda. The Trustees are principally Chubb management. Chubb maintains a non-interest bearing demand note receivable from the ACE Foundation – Bermuda (Borrower), the balance of which was $24 million and $25 million, at December 31, 2015 and 2014, respectively. The receivable is included in Other assets in the consolidated balance sheets. The Borrower has used the related proceeds to finance investments in Bermuda real estate, some of which have been rented to Chubb employees at rates established by independent, professional real estate appraisers. The Borrower uses income from the investments to both repay the note and to fund charitable activities. Accordingly, we report the demand note at the lower of its principal value or the fair value of assets held by the Borrower to repay the loan, including the real estate properties.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

19. Statutory financial information

Our subsidiaries file financial statements prepared in accordance with statutory accounting practices prescribed or permitted by insurance regulators. Statutory accounting differs from GAAP in the reporting of certain reinsurance contracts, investments, subsidiaries, acquisition expenses, fixed assets, deferred income taxes, and certain other items. Some jurisdictions impose complex regulatory requirements on insurance companies while other jurisdictions impose fewer requirements. In some jurisdictions, we must obtain licenses issued by governmental authorities to conduct local insurance business. These licenses may be subject to reserves and minimum capital and solvency tests. Jurisdictions may impose fines, censure, and/or criminal sanctions for violation of regulatory requirements. The 2015 amounts below are based on estimates.

Chubb's insurance and reinsurance subsidiaries are subject to insurance laws and regulations in the jurisdictions in which they operate. These regulations include restrictions that limit the amount of dividends or other distributions, such as loans or cash advances, available to shareholders without prior approval of the local insurance regulatory authorities. The amount of dividends available to be paid in 2016 without prior approval totals $4.1 billion.

The statutory capital and surplus of our insurance subsidiaries met regulatory requirements for 2015, 2014, and 2013. The minimum amounts of statutory capital and surplus necessary to satisfy regulatory requirements was $14.5 billion and $14.8 billion for December 31, 2015 and 2014, respectively. These minimum regulatory capital requirements were significantly lower than the corresponding amounts required by the rating agencies which review Chubb’s insurance and reinsurance subsidiaries.

The following tables present the combined statutory capital and surplus and statutory net income (loss) of our Property and casualty and Life subsidiaries:

	December 31
(in millions of U.S. dollars)	2015		2014
Statutory capital and surplus
Property and casualty	$	20,072	$	25,805
Life	$	1,216	$	1,463

	Year Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Statutory net income (loss)
Property and casualty	$	2,770		$	3,378		$	3,333
Life	$	(148	)	$	(248	)	$	409

The decrease in statutory capital and surplus in 2015 was primarily due to intercompany dividends declared to holding companies in anticipation of the Chubb acquisition.

Several insurance subsidiaries follow accounting practices prescribed or permitted by the jurisdiction of domicile that differ from the applicable local statutory practice. The application of prescribed or permitted accounting practices does not have a material impact on Chubb's statutory surplus and income. As prescribed by the Restructuring discussed previously in Note 7, certain of our U.S. subsidiaries discount certain A&E liabilities, which increased statutory capital and surplus by approximately $144 million and $158 million at December 31, 2015 and 2014, respectively.

F-71

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

20. Information provided in connection with outstanding debt of subsidiaries

The following tables present condensed consolidating financial information at December 31, 2015 and December 31, 2014, and for the years ended December 31, 2015, 2014, and 2013 for Chubb Limited (Parent Guarantor) and ACE INA Holdings, Inc. (Subsidiary Issuer). The Subsidiary Issuer is an indirect 100 percent-owned subsidiary of the Parent Guarantor. The Parent Guarantor fully and unconditionally guarantees certain of the debt of the Subsidiary Issuer. Condensed consolidating financial information of the Parent Guarantor and Subsidiary Issuer are presented on the equity method of accounting. The revenues and expenses and cash flows of the subsidiaries of the Subsidiary Issuer are presented in the Other Chubb Limited Subsidiaries column on a combined basis.

Condensed Consolidating Balance Sheet at December 31, 2015

(in millions of U.S. dollars)	Chubb Limited (Parent Guarantor)		ACE INA Holdings Inc. (Subsidiary Issuer)		Other Chubb Limited Subsidiaries		Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
Assets
Investments	$	28	$	7,839	$	58,384	$	—		$	66,251
Cash(1)	1		2		2,743		(971		)	1,775
Insurance and reinsurance balances receivable	—		—		6,075		(752		)	5,323
Reinsurance recoverable on losses and loss expenses	—		—		20,124		(8,738		)	11,386
Reinsurance recoverable on policy benefits	—		—		1,129		(942		)	187
Value of business acquired	—		—		395		—			395
Goodwill and other intangible assets	—		—		5,683		—			5,683
Investments in subsidiaries	29,612		18,386		—		(47,998		)	—
Due from subsidiaries and affiliates, net	644		1,800		—		(2,444		)	—
Other assets	8		517		14,434		(3,593		)	11,366
Total assets	$	30,293	$	28,544	$	108,967	$	(65,438	)	$	102,366
Liabilities
Unpaid losses and loss expenses	$	—	$	—	$	45,490	$	(8,187	)	$	37,303
Unearned premiums	—		—		10,243		(1,804		)	8,439
Future policy benefits	—		—		5,749		(942		)	4,807
Due to subsidiaries and affiliates, net	—		—		2,444		(2,444		)	—
Affiliated notional cash pooling programs(1)	882		89		—		(971		)	—
Repurchase agreements	—		—		1,404		—			1,404
Long-term debt	—		9,436		11		—			9,447
Trust preferred securities	—		309		—		—			309
Other liabilities	276		1,422		12,916		(3,092		)	11,522
Total liabilities	1,158		11,256		78,257		(17,440		)	73,231
Total shareholders’ equity	29,135		17,288		30,710		(47,998		)	29,135
Total liabilities and shareholders’ equity	$	30,293	$	28,544	$	108,967	$	(65,438	)	$	102,366

⁽¹⁾  Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2015, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

F-72

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

Condensed Consolidating Balance Sheet at December 31, 2014

(in millions of U.S. dollars)	Chubb Limited (Parent Guarantor)		ACE INA Holdings Inc. (Subsidiary Issuer)		Other Chubb Limited Subsidiaries		Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
Assets
Investments	$	30	$	225	$	62,649	$	—		$	62,904
Cash(1)	—		1		1,209		(555		)	655
Insurance and reinsurance balances receivable	—		—		6,178		(752		)	5,426
Reinsurance recoverable on losses and loss expenses	—		—		20,992		(9,000		)	11,992
Reinsurance recoverable on policy benefits	—		—		1,194		(977		)	217
Value of business acquired	—		—		466		—			466
Goodwill and other intangible assets	—		—		5,724		—			5,724
Investments in subsidiaries	29,497		18,762		—		(48,259		)	—
Due from subsidiaries and affiliates, net	583		—		—		(583		)	—
Other assets	4		295		14,196		(3,631		)	10,864
Total assets	$	30,114	$	19,283	$	112,608	$	(63,757	)	$	98,248
Liabilities
Unpaid losses and loss expenses	$	—	$	—	$	46,770	$	(8,455	)	$	38,315
Unearned premiums	—		—		9,958		(1,736		)	8,222
Future policy benefits	—		—		5,731		(977		)	4,754
Due to subsidiaries and affiliates, net	—		422		161		(583		)	—
Affiliated notional cash pooling programs(1)	246		309		—		(555		)	—
Repurchase agreements	—		—		1,402		—			1,402
Short-term debt	—		1,150		—		—			1,150
Long-term debt	—		3,345		12		—			3,357
Trust preferred securities	—		309		—		—			309
Other liabilities	281		1,404		12,659		(3,192		)	11,152
Total liabilities	527		6,939		76,693		(15,498		)	68,661
Total shareholders’ equity	29,587		12,344		35,915		(48,259		)	29,587
Total liabilities and shareholders’ equity	$	30,114	$	19,283	$	112,608	$	(63,757	)	$	98,248

⁽¹⁾  Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2014, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

F-73

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

Condensed Consolidating Statements of Operations and Comprehensive Income

For the Year Ended December 31, 2015	Chubb Limited (Parent Guarantor)			ACE INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net premiums written	$	—		$	—		$	17,713		$	—		$	17,713
Net premiums earned	—			—			17,213			—			17,213
Net investment income	3			4			2,187			—			2,194
Equity in earnings of subsidiaries	2,673			1,038			—			(3,711		)	—
Net realized gains (losses) including OTTI	—			(9		)	(411		)	—			(420		)
Losses and loss expenses	—			—			9,484			—			9,484
Policy benefits	—			—			543			—			543
Policy acquisition costs and administrative expenses	63			28			5,120			—			5,211
Interest (income) expense	(32		)	302			30			—			300
Other (income) expense	(208		)	(4		)	161			—			(51		)
Amortization of intangible assets	—			—			171			—			171
Chubb integration expenses	3			29			1			—			33
Income tax expense (benefit)	16			(349		)	795			—			462
Net income	$	2,834		$	1,027		$	2,684		$	(3,711	)	$	2,834
Comprehensive income (loss)	$	908		$	(192	)	$	757		$	(565	)	$	908

Condensed Consolidating Statements of Operations and Comprehensive Income

For the Year Ended December 31, 2014	Chubb Limited (Parent Guarantor)			ACE INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net premiums written	$	—		$	—		$	17,799		$	—		$	17,799
Net premiums earned	—			—			17,426			—			17,426
Net investment income	2			2			2,248			—			2,252
Equity in earnings of subsidiaries	2,707			791			—			(3,498		)	—
Net realized gains (losses) including OTTI	—			53			(560		)	—			(507		)
Losses and loss expenses	—			—			9,649			—			9,649
Policy benefits	—			—			517			—			517
Policy acquisition costs and administrative expenses	78			26			5,216			—			5,320
Interest (income) expense	(35		)	277			38			—			280
Other (income) expense	(201		)	27			(16		)	—			(190		)
Amortization of intangible assets	—			—			108			—			108
Income tax expense (benefit)	14			(94		)	714			—			634
Net income	$	2,853		$	610		$	2,888		$	(3,498	)	$	2,853
Comprehensive income	$	2,892		$	583		$	2,926		$	(3,509	)	$	2,892

F-74

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

Condensed Consolidating Statements of Operations and Comprehensive Income

For the Year Ended December 31, 2013	Chubb Limited (Parent Guarantor)			ACE INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries		Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net premiums written	$	—		$	—		$	17,025	$	—		$	17,025
Net premiums earned	—			—			16,613		—			16,613
Net investment income	2			3			2,139		—			2,144
Equity in earnings of subsidiaries	3,580			942			—		(4,522		)	—
Net realized gains (losses) including OTTI	—			(2		)	506		—			504
Losses and loss expenses	—			—			9,348		—			9,348
Policy benefits	—			—			515		—			515
Policy acquisition costs and administrative expenses	60			19			4,791		—			4,870
Interest (income) expense	(32		)	270			37		—			275
Other (income) expense	(221		)	27			114		—			(80		)
Amortization of intangible assets	—			—			95		—			95
Income tax expense (benefit)	17			(108		)	571		—			480
Net income	$	3,758		$	735		$	3,787	$	(4,522	)	$	3,758
Comprehensive income (loss)	$	2,023		$	(230	)	$	2,051	$	(1,821	)	$	2,023

F-75

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

Condensed Consolidating Statement of Cash Flows

For the Year Ended December 31, 2015	Chubb Limited (Parent Guarantor)			ACE INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net cash flows from operating activities	$	3,125		$	682		$	3,836		$	(3,779	)	$	3,864
Cash flows from investing activities
Purchases of fixed maturities available for sale	—			—			(16,053		)	(18		)	(16,071		)
Purchases of fixed maturities held to maturity	—			—			(62		)	—			(62		)
Purchases of equity securities	—			—			(158		)	—			(158		)
Sales of fixed maturities available for sale	—			—			10,814			—			10,814
Sales of equity securities	—			—			183			—			183
Maturities and redemptions of fixed maturities available for sale	—			—			6,567			—			6,567
Maturities and redemptions of fixed maturities held to maturity	—			—			669			—			669
Net change in short-term investments	—			(7,588		)	(628		)	—			(8,216		)
Net derivative instruments settlements	—			(9		)	(12		)	—			(21		)
Acquisition of subsidiaries (net of cash acquired of $629)	—			—			264			—			264
Capital contribution	(2,670		)	(625		)	(2,791		)	6,086			—
Other	—			(25		)	(256		)	18			(263		)
Net cash flows used for investing activities	(2,670		)	(8,247		)	(1,463		)	6,086			(6,294		)
Cash flows from financing activities
Dividends paid on Common Shares	(862		)	—			—			—			(862		)
Common Shares repurchased	—			—			(758		)	—			(758		)
Proceeds from issuance of long-term debt	—			6,090			—			—			6,090
Proceeds from issuance of repurchase agreements	—			—			2,029			—			2,029
Repayment of long-term debt	—			(1,150		)	—			—			(1,150		)
Repayment of repurchase agreements	—			—			(2,027		)	—			(2,027		)
Proceeds from share-based compensation plans, including windfall tax benefits	—			—			131			—			131
Advances (to) from affiliates	(228		)	95			133			—			—
Dividends to parent company	—			—			(3,779		)	3,779			—
Capital contribution	—			2,791			3,295			(6,086		)	—
Net proceeds from affiliated notional cash pooling programs(1)	636			(220		)	—			(416		)	—
Policyholder contract deposits	—			—			503			—			503
Policyholder contract withdrawals	—			—			(221		)	—			(221		)
Other	—			(40		)	—			—			(40		)
Net cash flows (used for) from financing activities	(454		)	7,566			(694		)	(2,723		)	3,695
Effect of foreign currency rate changes on cash and cash equivalents	—			—			(145		)	—			(145		)
Net (decrease) increase in cash	1			1			1,534			(416		)	1,120
Cash – beginning of year(1)	—			1			1,209			(555		)	655
Cash – end of year(1)	$	1		$	2		$	2,743		$	(971	)	$	1,775

⁽¹⁾  Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2015 and 2014, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

F-76

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

Condensed Consolidating Statement of Cash Flows

For the Year Ended December 31, 2014	Chubb Limited (Parent Guarantor)			ACE INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net cash flows from (used for) operating activities	$	541		$	210		$	4,419		$	(674	)	$	4,496
Cash flows from investing activities
Purchases of fixed maturities available for sale	—			—			(15,816		)	263			(15,553		)
Purchases of fixed maturities held to maturity	—			—			(267		)	—			(267		)
Purchases of equity securities	—			—			(251		)	—			(251		)
Sales of fixed maturities available for sale	—			—			7,750			(268		)	7,482
Sales of equity securities	—			—			670			—			670
Maturities and redemptions of fixed maturities available for sale	—			—			6,413			—			6,413
Maturities and redemptions of fixed maturities held to maturity	—			—			875			—			875
Net change in short-term investments	—			(216		)	(392		)	5			(603		)
Net derivative instruments settlements	—			53			(283		)	—			(230		)
Acquisition of subsidiaries (net of cash acquired of $20)	—			—			(766		)	—			(766		)
Capital contribution	—			(258		)	—			258			—
Other	—			(8		)	(266		)	—			(274		)
Net cash flows used for investing activities	—			(429		)	(2,333		)	258			(2,504		)
Cash flows from financing activities
Dividends paid on Common Shares	(862		)	—			—			—			(862		)
Common Shares repurchased	—			—			(1,429		)	—			(1,429		)
Proceeds from issuance of long-term debt	—			699			—			—			699
Proceeds from the issuance of repurchase agreements	—			—			1,978			—			1,978
Repayment of long-term debt	—			(500		)	(1		)	—			(501		)
Repayment of repurchase agreements	—			—			(1,977		)	—			(1,977		)
Proceeds from share-based compensation plans, including windfall tax benefits	—			—			127			—			127
Advances (to) from affiliates	260			(298		)	38			—			—
Dividends to parent company	—			—			(674		)	674			—
Capital contribution	—			—			258			(258		)	—
Net proceeds from (payments to) affiliated notional cash pooling programs(1)	61			309			—			(370		)	—
Policyholder contract deposits	—			—			366			—			366
Policyholder contract withdrawals	—			—			(172		)	—			(172		)
Other	—			(6		)	—			—			(6		)
Net cash flows (used for) from financing activities	(541		)	204			(1,486		)	46			(1,777		)
Effect of foreign currency rate changes on cash and cash equivalents	—			—			(139		)	—			(139		)
Net (decrease) increase in cash	—			(15		)	461			(370		)	76
Cash – beginning of year(1)	—			16			748			(185		)	579
Cash – end of year(1)	$	—		$	1		$	1,209		$	(555	)	$	655

⁽¹⁾ Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2014 and 2013, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

F-77

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

Condensed Consolidating Statement of Cash Flows

For the Year Ended December 31, 2013	Chubb Limited (Parent Guarantor)			ACE INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net cash flows from (used for) operating activities	$	970		$	(107	)	$	3,984		$	(825	)	$	4,022
Cash flows from investing activities
Purchases of fixed maturities available for sale	—			—			(21,504		)	106			(21,398		)
Purchases of fixed maturities held to maturity	—			—			(447		)	—			(447		)
Purchases of equity securities	—			—			(264		)	—			(264		)
Sales of fixed maturities available for sale	—			—			10,519			(106		)	10,413
Sales of equity securities	—			—			142			—			142
Maturities and redemptions of fixed maturities available for sale	—			—			6,941			—			6,941
Maturities and redemptions of fixed maturities held to maturity	—			—			1,488			—			1,488
Net change in short-term investments	(1		)	4			521			—			524
Net derivative instruments settlements	—			(1		)	(470		)	—			(471		)
Capital contribution	(133		)	(1,097		)	—			1,230			—
Acquisition of subsidiaries (net of cash acquired of $38)	—			—			(977		)	—			(977		)
Other	—			(4		)	(389		)	—			(393		)
Net cash flows used for investing activities	(134		)	(1,098		)	(4,440		)	1,230			(4,442		)
Cash flows from financing activities
Dividends paid on Common Shares	(517		)	—			—			—			(517		)
Common Shares repurchased	—			—			(287		)	—			(287		)
Proceeds from issuance of long-term debt	—			947			—						947
Proceeds from issuance of repurchase agreements	—			—			2,572			—			2,572
Repayment of repurchase agreements	—			—			(2,572		)	—			(2,572		)
Proceeds from share-based compensation plans, including windfall tax benefits	14			—			121			—			135
Advances from (to) affiliates	(621		)	621			—			—			—
Dividends to parent company	—			—			(825		)	825			—
Capital contribution	—			—			1,230			(1,230		)	—
Net proceeds from (payments to) affiliated notional cash pooling programs(1)	185			(349		)	—			164			—
Policyholder contract deposits	—			—			233			—			233
Policyholder contract withdrawals	—			—			(120		)	—			(120		)
Other	—			—			—			—			—
Net cash flows (used for) from financing activities	(939		)	1,219			352			(241		)	391
Effect of foreign currency rate changes on cash and cash equivalents	—			—			(7		)	—			(7		)
Net increase (decrease) in cash	(103		)	14			(111		)	164			(36		)
Cash – beginning of year(1)	103			2			859			(349		)	615
Cash – end of year(1)	$	—		$	16		$	748		$	(185	)	$	579

⁽¹⁾ Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2013 and 2012, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

F-78

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)

Chubb Limited and Subsidiaries

21. Condensed unaudited quarterly financial data

	Three Months Ended
	March 31			June 30		September 30			December 31
(in millions of U.S. dollars, except per share data)	2015			2015		2015			2015
Net premiums earned	$	3,927		$	4,360	$	4,719		$	4,207
Net investment income	551			562		549			532
Net realized gains (losses) including OTTI	(89		)	126		(397		)	(60		)
Total revenues	$	4,389		$	5,048	$	4,871		$	4,679
Losses and loss expenses	$	2,122		$	2,417	$	2,643		$	2,302
Policy benefits	$	142		$	153	$	89		$	159
Net income	$	681		$	942	$	528		$	683
Basic earnings per share	$	2.08		$	2.89	$	1.63		$	2.10
Diluted earnings per share	$	2.05		$	2.86	$	1.62		$	2.08

	Three Months Ended
	March 31			June 30			September 30			December 31
(in millions of U.S. dollars, except per share data)	2014			2014			2014			2014
Net premiums earned	$	3,970		$	4,332		$	4,754		$	4,370
Net investment income	553			556			566			577
Net realized gains (losses) including OTTI	(104		)	(73		)	(120		)	(210		)
Total revenues	$	4,419		$	4,815		$	5,200		$	4,737
Losses and loss expenses	$	2,161		$	2,388		$	2,684		$	2,416
Policy benefits	$	114		$	144		$	125		$	134
Net income (1)	$	734		$	779		$	785		$	555
Basic earnings per share	$	2.16		$	2.30		$	2.35		$	1.68
Diluted earnings per share	$	2.14		$	2.28		$	2.32		$	1.66

⁽¹⁾ Net income for the three months ended December 31, 2014 includes $89 million of net charges related to income taxes to correct prior periods. Such amounts are not material to any period presented.

F-79

SCHEDULE I

Chubb Limited and Subsidiaries

SUMMARY OF INVESTMENTS – OTHER THAN INVESTMENTS IN RELATED PARTIES

December 31, 2015 (in millions of U.S. dollars)	Cost or Amortized Cost		Fair Value		Amount at Which Shown in the Balance Sheet
Fixed maturities available for sale
U.S. Treasury and agency	$	2,481	$	2,528	$	2,528
Foreign	13,190		13,445		13,445
Corporate securities	15,028		14,929		14,929
Mortgage-backed securities	9,827		9,958		9,958
States, municipalities, and political subdivisions	2,623		2,727		2,727
Total fixed maturities available for sale	43,149		43,587		43,587
Fixed maturities held to maturity
U.S. Treasury and agency	733		745		733
Foreign	763		785		763
Corporate securities	3,054		3,056		3,054
Mortgage-backed securities	1,707		1,743		1,707
States, municipalities, and political subdivisions	2,173		2,223		2,173
Total fixed maturities held to maturity	8,430		8,552		8,430
Equity securities
Industrial, miscellaneous, and all other	441		497		497
Short-term investments	10,446		10,446		10,446
Other investments	2,993		3,291		3,291
Total investments - other than investments in related parties	$	65,459	$	66,373	$	66,251

F-80

SCHEDULE II

Chubb Limited and Subsidiaries

CONDENSED FINANCIAL INFORMATION OF REGISTRANT

BALANCE SHEETS (Parent Company Only)

	December 31			December 31
(in millions of U.S. dollars)	2015			2014
Assets
Investments in subsidiaries and affiliates on equity basis	$	29,612		$	29,497
Short-term investments	1			1
Other investments, at cost	27			29
Total investments	29,640			29,527
Cash	1			—
Due from subsidiaries and affiliates, net	644			583
Other assets	8			4
Total assets	$	30,293		$	30,114
Liabilities
Affiliated notional cash pooling programs(1)	$	882		$	246
Accounts payable, accrued expenses, and other liabilities	276			281
Total liabilities	1,158			527
Shareholders' equity
Common Shares	7,833			8,055
Common Shares in treasury	(1,922		)	(1,448		)
Additional paid-in capital	4,481			5,145
Retained earnings	19,478			16,644
Accumulated other comprehensive income (loss)	(735		)	1,191
Total shareholders' equity	29,135			29,587
Total liabilities and shareholders' equity	$	30,293		$	30,114
(1) Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information.
The condensed financial information should be read in conjunction with the consolidated financial statements and notes thereto.

F-81

SCHEDULE II (continued)

Chubb Limited and Subsidiaries

CONDENSED FINANCIAL INFORMATION OF REGISTRANT

STATEMENTS OF OPERATIONS (Parent Company Only)

	Years Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Revenues
Investment income, including interest income	$	35		$	37		$	34
Equity in net income of subsidiaries and affiliates	2,673			2,707			3,580
Net realized gains (losses)	—			—			—
	2,708			2,744			3,614
Expenses
Administrative and other (income) expense	(142		)	(123		)	(161		)
Income tax expense	16			14			17
	(126		)	(109		)	(144		)
Net income	$	2,834		$	2,853		$	3,758
Comprehensive income	$	908		$	2,892		$	2,023
The condensed financial information should be read in conjunction with the consolidated financial statements and notes thereto.

F-82

SCHEDULE II (continued)

Chubb Limited and Subsidiaries

CONDENSED FINANCIAL INFORMATION OF REGISTRANT

STATEMENTS OF CASH FLOWS (Parent Company Only)

	Year Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Net cash flows from operating activities(1)	$	3,125		$	541		$	970
Cash flows from investing activities
Net change in short-term investments	—			—			(1		)
Net derivative instruments settlements	—			—			—
Capital contribution	(2,670		)	—			(133		)
Net cash flows used for investing activities	(2,670		)	—			(134		)
Cash flows from financing activities
Dividends paid on Common Shares	(862		)	(862		)	(517		)
Proceeds from issuance of short-term debt	—			—			—
Repayment of short-term debt	—			—			—
Proceeds from share-based compensation plans	—			—			14
Advances (to) from affiliates	(228		)	260			(621		)
Net proceeds from affiliated notional cash pooling programs(2)	636			61			185
Net cash flows used for financing activities	(454		)	(541		)	(939		)
Net decrease in cash	1			—			(103		)
Cash – beginning of year	—			—			103
Cash – end of year	$	1		$	—		$	—
(1) Includes cash dividends received from subsidiaries of $2.9 billion, $300 million, and $825 million in 2015, 2014, and 2013, respectively.
(2) Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information.
The condensed financial information should be read in conjunction with the consolidated financial statements and notes thereto.

F-83

SCHEDULE IV

Chubb Limited and Subsidiaries

SUPPLEMENTAL INFORMATION CONCERNING REINSURANCE

Premiums Earned
For the years ended December 31, 2015, 2014, and 2013 (in millions of U.S. dollars, except for percentages)	Direct Amount		Ceded To Other Companies		Assumed From Other Companies		Net Amount		Percentage of Amount Assumed to Net
2015
Property and Casualty	$	14,895	$	5,373	$	3,259	$	12,781	25	%
Accident and Health	3,684		351		168		3,501		5	%
Life	776		94		249		931		27	%
Total	$	19,355	$	5,818	$	3,676	$	17,213	21	%
2014
Property and Casualty	$	14,784	$	4,940	$	2,923	$	12,767	23	%
Accident and Health	3,971		434		141		3,678		4	%
Life	800		91		272		981		28	%
Total	$	19,555	$	5,465	$	3,336	$	17,426	19	%
2013
Property and Casualty	$	14,286	$	5,160	$	3,015	$	12,141	25	%
Accident and Health	3,885		486		168		3,567		5	%
Life	685		76		296		905		33	%
Total	$	18,856	$	5,722	$	3,479	$	16,613	21	%

F-84

SCHEDULE VI

Chubb Limited and Subsidiaries

SUPPLEMENTARY INFORMATION CONCERNING PROPERTY AND CASUALTY OPERATIONS

As of and for the years ended December 31, 2015, 2014, and 2013 (in millions of U.S. dollars)
	Deferred Policy Acquisition Costs		Net Reserves for Unpaid Losses and Loss Expenses		Unearned Premiums		Net Premiums Earned		Net Investment Income		Net Losses and Loss Expenses Incurred Related to						Amortization of Deferred Policy Acquisition Costs		Net Paid Losses and Loss Expenses		Net Premiums Written
												Current Year		Prior Year
2015	$	2,219	$	26,562	$	8,439	$	16,282	$	2,007		$	10,030	$	(546	)	$	2,692	$	9,665	$	16,734
2014	$	2,057	$	27,008	$	8,222	$	16,445	$	2,071		$	10,176	$	(527	)	$	2,805	$	9,235	$	16,787
2013	$	1,865	$	26,831	$	7,539	$	15,708	$	1,977		$	9,878	$	(530	)	$	2,447	$	8,977	$	16,069

F-85

EX-10.1

Exhibit 10.1

AMENDED AND RESTATED ACE LIMITED DIRECTOR AND EXECUTIVE OFFICER INDEMNIFICATION AGREEMENT

THIS AMENDED AND RESTATED INDEMNIFICATION AGREEMENT (this “Agreement”) is entered into effective as of , 20 (the “Effective Date”) by and between ACE Limited, Zurich Switzerland, a Swiss company (the “Company”), and  (“Indemnitee”). This Agreement hereby amends and restates in its entirety the existing Indemnification Agreement entered into between the Company and Indemnitee (the “Prior Indemnification Agreement”).

WHEREAS, it is essential to the Company to retain and attract as directors and officers the most capable persons available;

WHEREAS, Indemnitee is a director and/or officer of the Company;

WHEREAS, both the Company and Indemnitee recognize the increased risk of litigation and other claims currently being asserted against directors and officers of corporations;

WHEREAS, the Articles of Association of the Company allow the Company to indemnify its directors and officers to the fullest extent permitted by law, and permit the Company to advance expenses relating to the defense of indemnification matters, and the Indemnitee has been serving and continues to serve as a director and/or officer of the Company in part in reliance on the Company’s Articles of Association;

WHEREAS, in recognition of Indemnitee’s need for (i) substantial protection against personal liability, (ii) specific contractual assurance that the protection allowed by the Articles of Association will be available to Indemnitee (regardless of, among other things, any amendment to or revocation of the Articles of Association or any change in the composition of the Company’s Board of Directors or acquisition transaction relating to the Company), and (iii) an inducement to provide effective services to the Company as a director and/or officer, the Company wishes to provide in this Agreement for the indemnification of and the advancing of expenses to Indemnitee to the fullest extent (whether partial or complete) permitted under law and as set forth in this Agreement, and, to the extent directors’ and officers’ liability insurance is maintained, to provide for the continued coverage of Indemnitee under the Company’s directors’ and officers’ liability insurance policies;

WHEREAS, the parties are party to Prior Indemnification Agreement pursuant to which the Company provided for the indemnification of and the advancing of expenses to Indemnitee;

WHEREAS, the parties now desire to revise the contractual terms of the Prior Indemnification Agreement to update and clarify certain rights and obligations of the parties; and

WHEREAS, the Company is a New York Stock Exchange-listed and United States Securities and Exchange Commission (“SEC”) reporting company.

NOW, THEREFORE, in consideration of the above premises and of Indemnitee continuing to serve the Company directly or, at its request, with another enterprise, and intending to be legally bound hereby, the parties agree as follows:

1. Certain Definitions:

(a) Board: the Board of Directors of the Company.

(b) Affiliate: any corporation or other person or entity that directly, or indirectly through one or more intermediaries, controls or is controlled by, or is under common control with, the person specified.

(c) Change in Control: shall be deemed to have occurred if:

(i) any “person,” as such term is used in Sections 3(a)(9) and 13(d) of the United States Securities Exchange Act of 1934, becomes a “beneficial owner,” as such term is used in Rule 13d-3 promulgated under that act, of 50% or more of the Voting Stock (as defined below) of the Company;

(ii) the majority of the Board consists of individuals other than Incumbent Directors, which term means the members of the Board on the Effective Date; provided that any person becoming a director subsequent to such date whose election or nomination for election was supported by three-quarters of the directors who then comprised the Incumbent Directors shall be considered to be an Incumbent Director;

(iii) the Company adopts any plan of liquidation providing for the distribution of all or substantially all of its assets;

(iv) all or substantially all of the assets or business of the Company is disposed of pursuant to a merger, consolidation or other transaction (unless the shareholders of the Company immediately prior to such merger, consolidation or other transaction beneficially own, directly or indirectly, in substantially the same proportion as they owned the Voting Stock of the Company, all of the Voting Stock or other ownership interests of the entity or entities, if any, that succeed to the business of the Company); or

(v) the Company combines with another company and is the surviving corporation but, immediately after the combination, the shareholders of the Company immediately prior to the combination hold, directly or indirectly, 50% or less of the Voting Stock of the combined company (there being excluded from the number of shares held by such shareholders, but not from the Voting Stock of the combined company, any shares received by Affiliates (as defined below) of such other company in exchange for stock of such other company).

For the purpose of this definition of “Change in Control,” (I) an “Affiliate” of a person or other entity shall mean a person or other entity that directly or indirectly controls, is controlled by, or is under common control with the person or other entity specified and (II) “Voting Stock” shall mean capital stock of any class or classes having general voting power under ordinary circumstances, in the absence of contingencies, to elect the directors of a corporation.

(d) Expenses: any expense, liability, or loss, including attorneys’ fees, judgments, fines, retainers, filings fees, court costs, transcript costs, fees of experts, witness fees, travel expenses, duplicating costs, printing and binding costs, telephone charges, postage, delivery, ERISA excise taxes and penalties, amounts paid or to be paid in settlement, any interest, assessments, or other charges imposed thereon, any federal, state, local, or foreign taxes imposed as a result of the actual or deemed receipt of any payments under this Agreement, and all other costs, disbursements, and obligations, paid or incurred in connection with investigating, defending, prosecuting (subject to Section 2(b)), being a witness in, participating in (including on appeal), or preparing for any of the foregoing in, any Proceeding relating to any Indemnifiable Event. Expenses also shall include expenses incurred in connection with any appeal resulting from any Proceeding, including without limitation the premium, security for, and other costs relating to any cost bond, supersedeas bond, or other appeal bond or its equivalent.

(e) Indemnifiable Event: any event or occurrence that takes place either prior to or after the execution of this Agreement, related to the fact that Indemnitee is or was a director or officer of the Company, or while a director or officer is or was serving at the request of the Company as a director, officer, employee, trustee, agent, or fiduciary of another foreign or domestic corporation, partnership, limited liability

company, joint venture, employee benefit plan, trust, or other enterprise, or was a director, officer, employee, or agent of a foreign or domestic corporation that was a predecessor corporation of the Company or of another enterprise at the request of such predecessor corporation, or related to anything done or not done by Indemnitee in any such capacity, whether or not the basis of the Proceeding is alleged action in an official capacity as a director, officer, employee, or agent or in any other capacity while serving as a director, officer, employee, or agent of the Company, as described above.

(f) Independent Counsel: the person or body appointed in connection with Section 3.

(g) Proceeding: any threatened, pending, or completed action, suit, or proceeding or any alternative dispute resolution mechanism (including an action by or in the right of the Company), or any inquiry, hearing, or investigation, whether conducted by the Company or any other party, that Indemnitee in good faith believes might lead to the institution of any such action, suit, or proceeding, whether civil, criminal, administrative, investigative, or other.

(h) Reviewing Party: the person or body appointed in accordance with Section 3.

(i) Voting Securities: any securities of the Company that vote generally in the election of directors.

2. Agreement to Indemnify.

(a) General Agreement. In the event Indemnitee was, is, or becomes a party to or witness or other participant in, or is threatened to be made a party to or witness or other participant in, a Proceeding by reason of (or arising in part out of) an Indemnifiable Event, the Company shall indemnify Indemnitee from and against any and all Expenses to the fullest extent permitted by applicable law or stock exchange regulation, as the same exists or may hereafter be amended or interpreted (but in the case of any such amendment or interpretation, unless otherwise required by law or stock exchange regulation, only to the extent that such amendment or interpretation permits the Company to provide broader indemnification rights than were permitted prior thereto). The parties hereto intend that this Agreement shall provide for indemnification in excess of that expressly or mandatorily permitted or provided by the Company’s Articles of Association, vote of its shareholders or disinterested directors, or applicable law, as the case may be.

(b) Initiation of Proceeding. Notwithstanding anything in this Agreement to the contrary, Indemnitee shall not be entitled to indemnification pursuant to this Agreement in connection with any Proceeding initiated by Indemnitee against the Company or any director or officer of the Company unless (i) the Company has joined in or the Board has consented to the initiation of such Proceeding; (ii) the Proceeding is one to enforce indemnification rights under Section 5; or (iii) the Proceeding is instituted after a Change in Control (other than a Change in Control approved by a majority of the directors on the Board who were directors immediately prior to such Change in Control) and Independent Counsel has approved its initiation.

(c) Expense Advances. If so requested by Indemnitee, to the fullest extent permitted by law or stock exchange regulation and the Company’s Articles of Association, the Company shall advance (within ten business days of such request) any and all Expenses to Indemnitee (an “Expense Advance”); provided that, (i) such an Expense Advance shall be made only upon delivery to the Company of an undertaking by or on behalf of the Indemnitee to repay the amount thereof if it is ultimately determined that Indemnitee is not entitled to be indemnified by the Company, and (ii) if and to the extent that the Reviewing Party determines that Indemnitee would not be permitted to be so indemnified under applicable law or stock exchange regulation, the Company shall be entitled to be reimbursed by Indemnitee (who hereby agrees to

reimburse the Company) for all such amounts theretofore paid. If Indemnitee has commenced or commences legal proceedings in a court of competent jurisdiction to secure a determination that Indemnitee should be indemnified under applicable law or stock exchange regulation, as provided in Section 4, any determination made by the Reviewing Party that Indemnitee would not be permitted to be indemnified under applicable law or stock exchange regulation shall not be binding, and Indemnitee shall not be required to reimburse the Company for any Expense Advance until a final judicial determination is made with respect thereto (as to which all rights of appeal therefrom have been exhausted or have lapsed). Indemnitee’s obligation to reimburse the Company for Expense Advances shall be unsecured and no interest shall be charged thereon.

(d) Mandatory Indemnification. Notwithstanding any other provision of this Agreement (except Section 16 below), to the extent that Indemnitee has been successful on the merits or otherwise in defense of any Proceeding relating in whole or in part to a Indemnifiable Event or in defense of any issue or matter therein, Indemnitee shall be indemnified against all Expenses incurred in connection therewith.

(e) Partial Indemnification. If Indemnitee is entitled under any provision of this Agreement to indemnification by the Company for some or a portion of Expenses, but not, however, for the total amount thereof, the Company shall nevertheless indemnify Indemnitee for the portion thereof to which Indemnitee is entitled.

(f) Prohibited Indemnification. No indemnification pursuant to this Agreement shall be paid by the Company:

(i) on account of any Proceeding in which judgment is rendered against Indemnitee for an accounting of profits made from the purchase or sale by Indemnitee of securities of the Company pursuant to the provisions of Section 16(b) of the Securities Exchange Act of 1934, as amended, or similar provisions of any federal, state, or local laws;

(ii) with respect to claims for breach of fiduciary duties under Swiss law, if a court of competent jurisdiction by a final judicial determination shall determine that the Indemnitee acted with willful intent or gross negligence; or

(iii) if a court of competent jurisdiction by a final judicial determination, shall determine that such indemnity is not permitted under applicable law.

3. Reviewing Party. Prior to any Change in Control, the Reviewing Party shall be any appropriate person or body consisting of a member or members of the Board or any other person or body appointed by the Board who is not a party to the particular Proceeding with respect to which Indemnitee is seeking indemnification; after a Change in Control, the Independent Counsel referred to below shall become the Reviewing Party. With respect to all matters arising after a Change in Control (other than a Change in Control approved by a majority of the directors on the Board who were directors immediately prior to such Change in Control) concerning the rights of Indemnitee to indemnity payments and Expense Advances under this Agreement or any other agreement or under applicable law or the Company’s Articles of Association now or hereafter in effect relating to indemnification for Indemnifiable Events, the Company shall seek legal advice only from independent counsel (“Independent Counsel”) selected by Indemnitee and approved by the Company (which approval shall not be unreasonably withheld), and who has not otherwise performed services for the Company or the Indemnitee (other than in connection with indemnification matters) within the last five years. The Independent Counsel shall not include any person who, under the applicable standards of professional conduct then prevailing, would have a conflict of interest in representing either the Company or Indemnitee in an action to determine Indemnitee’s rights under this Agreement. Such counsel, among other things, shall render its written opinion to the Company

and Indemnitee as to whether and to what extent the Indemnitee should be permitted to be indemnified under applicable law. The Company agrees to pay the reasonable fees of the Independent Counsel and to indemnify fully such counsel against any and all expenses (including attorneys’ fees), claims, liabilities, loss, and damages arising out of or relating to this Agreement or the engagement of Independent Counsel pursuant hereto. Indemnitee shall cooperate with the Reviewing Party with respect to Indemnitee’s entitlement to indemnification, including providing to the Reviewing Party upon reasonable advance request any documentation or information which is reasonably available to Indemnitee and reasonably necessary to such determination. Any Expenses (including attorneys’ fees and disbursements) incurred by Indemnitee in so cooperating with the Reviewing Party making such determination shall be borne by the Company (irrespective of the determination as to Indemnitee’s entitlement to indemnification) and the Company hereby indemnifies Indemnitee against such Expenses.

4. Indemnification Process and Appeal.

(a) Indemnification Payment. Indemnitee shall be entitled to indemnification of Expenses, and shall receive payment thereof, from the Company in accordance with this Agreement as soon as practicable after Indemnitee has made written demand on the Company for indemnification, unless the Reviewing Party has given a written opinion to the Company that Indemnitee is not entitled to indemnification under applicable law or stock exchange regulation.

(b) Suit to Enforce Rights. Regardless of any action by the Reviewing Party, if Indemnitee has not received full indemnification within thirty days after making a demand in accordance with Section 4(a), Indemnitee shall have the right to enforce its indemnification rights under this Agreement by commencing litigation in any court in the U.S. District Court for the Southern District of New York having subject matter jurisdiction thereof seeking an initial determination by the court or challenging any determination by the Reviewing Party or any aspect thereof. The Company hereby consents to service of process and to appear in any such proceeding. The remedy provided for in this Section 4 shall be in addition to any other remedies available to Indemnitee at law or in equity.

(c) Defense to Indemnification, Burden of Proof, and Presumptions. It shall be a defense to any action brought by Indemnitee against the Company to enforce this Agreement (other than an action brought to enforce a claim for Expenses incurred in defending a Proceeding in advance of its final disposition where the required undertaking has been tendered to the Company) that it is not permissible under applicable law or stock exchange regulation for the Company to indemnify Indemnitee for the amount claimed. In connection with any such action or any determination by the Reviewing Party or otherwise as to whether Indemnitee is entitled to be indemnified hereunder, (i) the burden of proving such a defense or determination shall be on the Company and (ii) the Reviewing Party shall presume that Indemnitee is entitled to indemnification under this Agreement if Indemnitee has submitted a request for indemnification in accordance with this Section 4. Neither the failure of the Reviewing Party or the Company (including its Board, independent legal counsel, or its stockholders) to have made a determination prior to the commencement of such action by Indemnitee that indemnification of the claimant is proper under the circumstances because Indemnitee has met the standard of conduct set forth in applicable law, nor an actual determination by the Reviewing Party or Company (including its Board, independent legal counsel, or its stockholders) that the Indemnitee had not met such applicable standard of conduct, shall be a defense to the action or create a presumption that the Indemnitee has not met the applicable standard of conduct. For purposes of this Agreement, to the fullest extent permitted by law, the termination of any claim, action, suit, or proceeding, by judgment, order, settlement (whether with or without court approval), conviction, or upon a plea of nolo contendere, or its equivalent, shall not, of itself, create a presumption that Indemnitee did not meet any particular standard of conduct or have any particular belief or that a court has determined that indemnification is not permitted by applicable law.

5. Indemnification for Expenses Incurred in Enforcing Rights. The Company shall indemnify Indemnitee against any and all out-of-pocket expenses that are incurred by Indemnitee in connection with any action brought by Indemnitee for

(a) indemnification or advance payment of Expenses by the Company under this Agreement or any other agreement or under applicable law or the Company’s Articles of Association now or hereafter in effect relating to indemnification for Indemnifiable Events, and/or

(b) recovery under directors’ and officers’ liability insurance policies maintained by the Company, but only in the event that Indemnitee ultimately is determined to be entitled to such indemnification or insurance recovery, as the case may be. In addition, the Company shall, if so requested by Indemnitee, advance such out-of-pocket expenses to Indemnitee, subject to and in accordance with Section 2(c).

6. Notification and Defense of Proceeding.

(a) Notice. Promptly after receipt by Indemnitee of notice of the commencement of any Proceeding, Indemnitee shall, if a claim in respect thereof is to be made against the Company under this Agreement, notify the Company of the commencement thereof; but the omission so to notify the Company will not relieve the Company from any liability that it may have to Indemnitee, except as provided in Section 6(c).

(b) Defense. With respect to any Proceeding as to which Indemnitee notifies the Company of the commencement thereof, the Company will be entitled to participate in the Proceeding at its own expense and, except as otherwise provided below, to the extent the Company so wishes, it may assume the defense thereof with counsel reasonably satisfactory to Indemnitee. After notice from the Company to Indemnitee of its election to assume the defense of any Proceeding, the Company shall not be liable to Indemnitee under this Agreement or otherwise for any Expenses subsequently incurred by Indemnitee in connection with the defense of such Proceeding other than reasonable costs of investigation or as otherwise provided below. Indemnitee shall have the right to employ legal counsel in such Proceeding, but all Expenses related thereto incurred after notice from the Company of its assumption of the defense shall be at Indemnitee’s expense unless: (i) the employment of legal counsel by Indemnitee has been authorized by the Company, (ii) Indemnitee has reasonably determined that there may be a conflict of interest between Indemnitee and the Company in the defense of the Proceeding, (iii) after a Change in Control (other than a Change in Control approved by a majority of the directors on the Board who were directors immediately prior to such Change in Control), the employment of counsel by Indemnitee has been approved by the Independent Counsel, or (iv) the Company shall not in fact have employed counsel to assume the defense of such Proceeding, in each of which cases all Expenses of the Proceeding shall be borne by the Company. The Company shall not be entitled to assume the defense of any Proceeding brought by or on behalf of the Company or as to which Indemnitee shall have made the determination provided for in (ii), (iii) and (iv) above.

(c) Settlement of Claims. The Company shall not be liable to indemnify Indemnitee under this Agreement or otherwise for any amounts paid in settlement of any Proceeding effected without the Company’s written consent, such consent not to be unreasonably withheld; provided, however, that if a Change in Control has occurred (other than a Change in Control approved by a majority of the directors on the Board who were directors immediately prior to such Change in Control), the Company shall be liable for indemnification of Indemnitee for amounts paid in settlement if the Independent Counsel has approved the settlement. The Company shall not settle any Proceeding in any manner that would impose any penalty or limitation on Indemnitee without Indemnitee’s written consent. The Company shall not be liable to indemnify the Indemnitee under this Agreement with regard to any judicial award if the Company was not given a reasonable and timely opportunity, at its expense, to participate in the defense of such

action; the Company’s liability hereunder shall not be excused if participation in the Proceeding by the Company was barred by this Agreement.

7. Establishment of Trust or Escrow Account. In the event of a Change in Control (other than a Change in Control approved by a majority of the directors on the Board who were directors immediately prior to such Change in Control) the Company shall, upon written request by Indemnitee, create a trust or escrow account (a “Trust or Escrow Account”) for the benefit of the Indemnitee and from time to time upon written request of Indemnitee shall fund the Trust or Escrow Account in an amount sufficient to satisfy any and all Expenses reasonably anticipated at the time of each such request to be incurred in connection with investigating, preparing for, participating in, and/or defending any Proceeding relating to an Indemnifiable Event. The amount or amounts to be deposited in the Trust or Escrow Account pursuant to the foregoing funding obligation shall be determined by the Independent Counsel. The terms of the Trust or Escrow Account shall provide that (i) the Trust or Escrow Account shall not be revoked or the principal thereof invaded without the written consent of the Indemnitee, (ii) the related trustee or escrow agent (the “Trustee or Escrow Agent”) shall advance, within ten business days of a request by the Indemnitee, any and all Expenses to the Indemnitee (and the Indemnitee hereby agrees to reimburse the Trust or Escrow Account under the same circumstances for which the Indemnitee would be required to reimburse the Company under Section 2(c) of this Agreement), (iii) the Trust or Escrow Account shall continue to be funded by the Company in accordance with the funding obligation set forth above, (iv) the Trustee or Escrow Agent shall promptly pay to the Indemnitee all amounts for which the Indemnitee shall be entitled to indemnification pursuant to this Agreement or otherwise, and (v) all unexpended funds in the Trust or Escrow Account shall revert to the Company upon a final determination by the Independent Counsel or a court of competent jurisdiction, as the case may be, that the Indemnitee has been fully indemnified under the terms of this Agreement. The Trustee or Escrow Agent shall be chosen by the Indemnitee. Nothing in this Section 7 shall relieve the Company of any of its obligations under this Agreement. All income earned on the assets held in the Trust or Escrow Account shall be reported as income by the Company for federal, state, local, and foreign tax purposes. The Company shall pay all costs of establishing and maintaining the Trust or Escrow Account and shall indemnify the Trustee or Escrow Agent against any and all expenses (including attorneys’ fees), claims, liabilities, loss, and damages arising out of or relating to this Agreement or the establishment and maintenance of the Trust or Escrow Account.

8. Non-Exclusivity. The rights of Indemnitee hereunder shall be in addition to any other rights Indemnitee may have under the Company’s Articles of Association, applicable law, or otherwise; provided, however, that this Agreement shall supersede any prior indemnification agreement between the Company and the Indemnitee. To the extent that a change in applicable law (whether by statute or judicial decision) permits greater indemnification than would be afforded currently under the Company’s Articles of Association, applicable law, or this Agreement, it is the intent of the parties that Indemnitee enjoy by this Agreement the greater benefits so afforded by such change.

9. Liability Insurance. To the extent the Company maintains an insurance policy or policies providing general and/or directors’ and officers’ liability insurance, Indemnitee shall be covered by such policy or policies, in accordance with its or their terms, to the maximum extent of the coverage available for any Company director or officer, subject to applicable stock exchange or SEC regulations.

10. Continuation of Contractual Indemnity or Period of Limitations. All agreements and obligations of the Company contained herein shall continue for so long as Indemnitee shall be subject to, or involved in, any proceeding for which indemnification is provided pursuant to this Agreement. Notwithstanding the foregoing, no legal action for which indemnification is to be provided pursuant to this Agreement shall be brought and no claim or cause of action shall be asserted by or on behalf of the Company or any Affiliate

of the Company against Indemnitee, Indemnitee’s spouse, heirs, executors, or personal or legal representatives after the expiration of five years from the date of accrual of such cause of action, or such longer period as may be available under Swiss law under the circumstances. Any claim or cause of action of the Company or its Affiliate not brought during such time period referenced above shall be extinguished and deemed released.

11. Amendment of this Agreement. No supplement, modification, or amendment of this Agreement shall be binding unless executed in writing by both of the parties hereto. No waiver of any of the provisions of this Agreement shall be binding unless in the form of a writing signed by the party against whom enforcement of the waiver is sought, and no such waiver shall operate as a waiver of any other provisions hereof (whether or not similar), nor shall such waiver constitute a continuing waiver. Except as specifically provided herein, no failure to exercise or any delay in exercising any right or remedy hereunder shall constitute a waiver thereof.

12. Subrogation. In the event of payment under this Agreement, the Company shall be subrogated to the extent of such payment to all of the rights of recovery of Indemnitee, who shall execute all papers required and shall do everything that may be necessary to secure such rights, including the execution of such documents necessary to enable the Company effectively to bring suit to enforce such rights.

13. No Duplication of Payments. The Company shall not be liable under this Agreement to make any payment in connection with any claim made against Indemnitee to the extent Indemnitee has otherwise received payment (under any insurance policy, Articles of Association, or otherwise) of the amounts otherwise indemnifiable hereunder.

14. Binding Effect. This Agreement shall be binding upon and inure to the benefit of and be enforceable by the parties hereto and their respective successors (including any direct or indirect successor by purchase, merger, consolidation, or otherwise to all or substantially all of the business and/or assets of the Company), assigns, spouses, heirs, and personal and legal representatives. The Company shall require and cause any successor (whether direct or indirect by purchase, merger, consolidation, or otherwise) to all, substantially all, or a substantial part, of the business and/or assets of the Company, by written agreement in form and substance satisfactory to Indemnitee, expressly to assume and agree to perform this Agreement in the same manner and to the same extent that the Company would be required to perform if no such succession had taken place. The indemnification provided under this Agreement shall continue as to Indemnitee for any action taken or not taken while serving in an indemnified capacity pertaining to an Indemnifiable Event even though he may have ceased to serve in such capacity at the time of any Proceeding.

15. Severability. If any provision (or portion thereof) of this Agreement shall be held by a court of competent jurisdiction to be invalid, void, or otherwise unenforceable, the remaining provisions shall remain enforceable to the fullest extent permitted by law. Furthermore, to the fullest extent possible, the provisions of this Agreement (including, without limitation, each portion of this Agreement containing any provision held to be invalid, void, or otherwise unenforceable, that is not itself invalid, void, or unenforceable) shall be construed so as to give effect to the intent manifested by the provision held invalid, void, or unenforceable.

16. Governing Law. This Agreement shall be governed by and construed and enforced in accordance with the laws of New York applicable to contracts made and to be performed in such State without giving effect to its principles of conflicts of laws; provided that no indemnification or advancement of expenses provided for herein shall extend beyond what is permitted under Swiss law and further provided that no provision of this Agreement shall be upheld or be enforceable to the extent it constitutes, or its performance would constitute, a violation of directors’ duties under Swiss law.

17. Notices. All notices, demands, and other communications required or permitted hereunder shall be made in writing and shall be deemed to have been duly given if delivered by hand, against receipt, or mailed, postage prepaid, certified or registered mail, return receipt requested, and addressed to the Company at:

ACE LimitedBärengasse 32

Zurich, Switzerland CH-8001

Attention:        General Counsel

and to Indemnitee at:

Notice of change of address shall be effective only when given in accordance with this Section. All notices complying with this Section shall be deemed to have been received on the date of hand delivery or on the third business day after mailing. The failure to so notify the Company shall not relieve the Company of any obligation which it may have to Indemnitee under this Agreement or otherwise unless and only to the extent that such failure or delay materially prejudices the Company.

18. Counterparts. This Agreement may be executed in one or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument.

IN WITNESS WHEREOF, the parties hereto have duly executed and delivered this Agreement as of the day specified above.

ACE LIMITED

By:

Name:

Title:

Name:

EX-10.72

Exhibit 10.72

COMMITMENT INCREASE AGREEMENT

(Credit Agreement)

THIS COMMITMENT INCREASE AGREEMENT (this “Commitment Increase Agreement”), dated as of December 11, 2015, is among ACE Limited, a Swiss company (the “Parent”), ACE Bermuda Insurance Ltd., a Bermuda company (“ACE Bermuda”), ACE Tempest Life Reinsurance Ltd., a Bermuda company (“Tempest Life”), ACE Tempest Reinsurance Ltd., a Bermuda company (“Tempest”), and ACE INA Holdings Inc., a Delaware corporation (“ACE INA” and together with the Parent, ACE Bermuda, Tempest Life and Tempest, the “Borrowers” and each individually a “Borrower”), the Banks party hereto (the “Increasing Banks” and each individually an “Increasing Bank”), Wells Fargo Bank, National Association, as Administrative Agent, and the Issuing Banks party hereto.

WHEREAS, the Parent, the Borrowers, various financial institutions and the Administrative Agent are party to that certain Credit Agreement dated as of November 6, 2012 (the “Credit Agreement”). Capitalized terms used but not defined herein have the respective meanings set forth in the Credit Agreement.

WHEREAS, the Parent has requested an increase in the aggregate Commitments on the terms and subject to the conditions set forth herein.

NOW, THEREFORE, the parties hereto agree as follows:

SECTION 1.Increase in Commitments. Upon the occurrence of the Commitment Increase Date (as defined below): (a) each Increasing Bank agrees to increase its Commitment as specified in the second column (titled “Amount of Commitment Increase”) opposite its name on Schedule A hereto (collectively, the “Commitment Increase”); (b) after giving effect to the increases in Commitments contemplated by the foregoing clause (a), each Bank’s Commitment shall be the amount specified in the third column (titled “Amount of Commitment after Increase”) opposite its name on Schedule A hereto; (c) the aggregate Commitments under the Credit Agreement shall increase by the aggregate amount of the Commitment Increases of all Increasing Banks; and (d) the Administrative Agent and the Issuing Banks hereby consent to each Increasing Bank providing its Commitment Increase. For avoidance of doubt, the parties agree that the Commitment Increase shall constitute an increase in the aggregate Commitment consummated in accordance with and pursuant to Section 2.19 of the Credit Agreement.

SECTION 2.Representations and Warranties. The Parent represents and warrants as follows:

1.Authorization. The execution, delivery and performance by each Borrower of this Commitment Increase Agreement are within its corporate powers, have been duly authorized by all necessary corporate action, require no action by or in respect of, or filing with, any governmental authority or other Person and do not contravene, or constitute a default under, any provision of applicable law or regulation or of the memorandum of association, articles of association or by-laws (or any comparable document) of any Borrower or of any material agreement, judgment, injunction, order, decree or other instrument binding upon any Borrower or any of its Subsidiaries or result in the creation or imposition of any Lien on any asset of any Borrower or any of its Subsidiaries.

2.Enforceability. This Commitment Increase Agreement constitutes a legal, valid and binding obligation of the Borrowers enforceable against the Borrowers in accordance with its terms, subject to bankruptcy, insolvency or other laws of general application affecting the enforcement of creditors’ rights, the application of equitable principles and the non-availability of the equitable remedies of specific performance or injunctive relief.

3.Representations and Warranties; No Default. All representations and warranties of the Borrowers contained in the Credit Agreement and the other Loan Documents qualified as to materiality are

true and correct and those not so qualified are true and correct in all material respects, in each case both immediately before and after giving effect to the Commitment Increase (except to the extent any such representation or warranty is expressly stated to have been made as of a specific date, in which case such representation or warranty is true and correct (if qualified as to materiality) or true and correct in all material respects (if not so qualified), in each case as of such date), and no Default has occurred and is continuing, both immediately before and after giving effect to the Commitment Increase.

SECTION 3.Conditions Precedent. This Commitment Increase Agreement shall become effective on the date when each of the following conditions is satisfied (such date, the “Commitment Increase Date”):

1.Counterparts. The Administrative Agent shall have received from each Borrower and each Increasing Bank a counterpart of this Commitment Increase Agreement signed on behalf of such party.

2.Officer’s Certificate. The Administrative Agent shall have received a certificate of a Responsible Officer, certifying that, as of the Commitment Increase Date, (a) the representations and warranties in Section 2 of this Commitment Increase Agreement are true and correct and (b) the resolutions of each Borrower delivered in connection with the closing of the Credit Agreement remain in full force and effect and are sufficient to authorize the increase in the Commitments contemplated by this Commitment Increase Agreement.

SECTION 4.Miscellaneous.

1.Confirmation; Ratification and Affirmation. The provisions of the Credit Agreement shall remain in full force and effect following the effectiveness of this Commitment Increase Agreement. Each Borrower hereby (a) acknowledges the terms of this Commitment Increase Agreement and (b) ratifies and affirms its obligations under, and acknowledges, renews and extends its continued liability under, each Loan Document to which it is a party and agrees that each Loan Document to which it is a party remains in full force and effect. This Commitment Increase Agreement is a Loan Document.

2.Expenses. The Parent agrees to pay, promptly upon receipt of a reasonably detailed invoice therefor, all reasonable and documented fees and expenses of counsel to the Administrative Agent in connection with the preparation, negotiation, execution and delivery of this Commitment Increase Agreement.

3.Successors and Assigns. This Commitment Increase Agreement shall be binding upon, inure to the benefit of and be enforceable by the respective successors and assigns of the parties hereto.

4.Construction. Headings used herein are for convenience of reference only and shall not affect the meaning of this Commitment Increase Agreement.

5.Incorporation of Certain Provisions. Sections 1.02, 10.03, 10.10, 10.11, 10.12 and 10.13 of the Credit Agreement shall apply hereto as if fully set forth herein, mutatis mutandis (it being understood that references therein to “this Agreement” or “the Loan Documents” are or include references to this Commitment Increase Agreement).

6.Counterparts. This Commitment Increase Agreement may be executed in any number of counterparts and by different parties hereto on separate counterparts, each of which shall be an original and all of which taken together shall constitute one and the same agreement. Delivery to the Administrative Agent of a signed counterpart hereof, or signature page hereto, by facsimile or e-mail (in a .pdf or similar file) shall be effective as delivery of an original signed counterpart hereof or thereof.

[remainder of page intentionally LEFT BLANK]

IN WITNESS WHEREOF, the parties hereto have caused this Commitment Increase Agreement to be executed by their duly authorized officers as of the date first above written.

ACE LIMITED

Authorized Officer

Authorized Officer

ACE BERMUDA INSURANCE LTD.

The Common Seal of ACE Bermuda Insurance Ltd. was hereunto affixed in the presence of:

Authorized Officer

Authorized Officer

ACE TEMPEST LIFE REINSURANCE LTD.

The Common Seal of ACE Tempest Life Reinsurance Ltd. was hereunto affixed in the presence of:

Authorized Officer

Authorized Officer

(signatures continued)

Signature Page to Commitment Increase Agreement

ACE / Wells Fargo

ACE TEMPEST REINSURANCE LTD.

The Common Seal of ACE Tempest Reinsurance Ltd. was hereunto affixed in the presence of:

Authorized Officer

Authorized Officer

ACE INA HOLDINGS INC.

Authorized Officer

Authorized Officer

(signatures continued)

Signature Page to Commitment Increase Agreement

ACE / Wells Fargo

WELLS FARGO BANK, NATIONAL ASSOCIATION, as Administrative Agent, as an Issuing Bank, and as an Increasing Bank

By:________________________________

Name:________________________________

Title:________________________________

Signature Page to Commitment Increase Agreement

ACE / Wells Fargo

Citibank N.A., as an Issuing Bank and as an Increasing Bank

By:

Name:

Title:

JMORGAN CHASE BANK, N.A., as an Increasing Bank

By:

Name:

Title:

BARCLAYS BANK PLC, as an Increasing Bank

By:

Name:

Title:

HSBC BANK USA, National Association,

as an Increasing Bank

By:

Name:

Title:

LLOYDS BANK plc, as an Increasing Bank

By:

Name:

Title:

By:

Name:

Title:

Signature Page to Commitment Increase Agreement

ACE / Wells Fargo

The Bank of Tokyo-Mitsubishi, UFJ, Ltd. as an Increasing Bank

By:

Name:

Title:

BANK OF AMERICA, N.A., as an Increasing Bank

By:

Name:

Title:

Australia and New Zealand Banking Group

Limited, as an Increasing Bank

By:

Name:

Title:

ING BANK N.V., London Branch, as an Increasing Bank

By:

Name:

Title:

By:

Name:

Title:

Signature Page to Commitment Increase Agreement

ACE / Wells Fargo

State Street Bank and Trust Company, as an

Increasing Bank

By:

Name:

Title:

The Royal Bank of Scotland, plc, as an Increasing Bank

By:

Name:

Title:

GOLDMAN SACHS BANK USA, as an Increasing Bank

By:

Name:

Title:

MORGAN STANLEY BANK, N.A.,

as an Increasing Bank

By:

Name:

Title:

Royal Bank of Canada, as an Increasing Bank

By:

Name:

Title:

Signature Page to Commitment Increase Agreement

ACE / Wells Fargo

Standard Chartered Bank,

as an Increasing Bank

By:

Name:

Title:

THE BANK OF NEW YORK MELLON, as an Increasing Bank

By:

Name:

Title:

Signature Page to Commitment Increase Agreement

ACE / Wells Fargo

SCHEDULE A

COMMITMENTS

Bank	Amount of Existing Commitment	Amount of Commitment Increase	Amount of Commitment after Increase
Wells Fargo Bank, National Association	$100,000,000	$50,000,000	$150,000,000
Citibank, N.A.	$100,000,000	$50,000,000	$150,000,000
JPMorgan Chase Bank, N.A.	$100,000,000	$50,000,000	$150,000,000
Barclays Bank PLC	$75,000,000	$37,500,000	$112,500,000
HSBC Bank USA, National Association	$75,000,000	$37,500,000	$112,500,000
Lloyds Bank plc	$75,000,000	$37,500,000	$112,500,000
The Bank of Tokyo-Mitsubishi UFJ, Ltd.	$75,000,000	$37,500,000	$112,500,000
Bank of America, N.A.	$75,000,000	$37,500,000	$112,500,000
Australia and New Zealand Banking Group Limited	$50,000,000	$25,000,000	$75,000,000
ING Bank N.V., London Branch	$50,000,000	$25,000,000	$75,000,000
State Street Bank and Trust Company	$50,000,000	$25,000,000	$75,000,000
The Royal Bank of Scotland plc	$50,000,000	$25,000,000	$75,000,000
Goldman Sachs Bank USA	$25,000,000	$12,500,000	$37,500,000
Morgan Stanley Bank, N.A.	$25,000,000	$12,500,000	$37,500,000
Royal Bank of Canada	$25,000,000	$12,500,000	$37,500,000
Standard Chartered Bank	$25,000,000	$12,500,000	$37,500,000
The Bank of New York Mellon	$25,000,000	$12,500,000	$37,500,000
TOTAL	$1,000,000,000	$500,000,000	$1,500,000,000

EX-10.73

Exhibit 10.73

Chubb Limited

Performance Based Restricted Stock Award Terms

under the

ACE Limited 2004 Long-Term Incentive Plan

The Participant has been granted a Performance Based Restricted Stock Award by Chubb Limited (the “Company”) under the ACE Limited 2004 Long-Term Incentive Plan (the “Plan”). The shares of Stock granted as Covered Performance Shares and Premium Performance Shares pursuant to this Performance Based Restricted Stock Award shall be subject to the following Performance Based Restricted Stock Award Terms:

1.Terms of Award. The following words and phrases used in these Performance Based Restricted Stock Award Terms shall have the meanings set forth in this paragraph 1:

(a) The “Participant” is [Insert Name], who is the individual recipient of the Performance Based Restricted Stock Award on the specified Grant Date.

(b) The “Grant Date” is [Insert Date].

(c) The “Commencement Date” is [Insert Date].

(d) The number of “Covered Performance Shares” is [Insert Number], which is 50% [75% for Chief Executive Officer][66% for Vice Chairman and COO] of that portion of the Participant’s annual Long-Term Incentive Award which is granted in the form of restricted shares for the year in which the Grant Date occurs, as reflected in the corporate records and shown in the Record-Keeping System in the Participant’s individual account records.

(e) The number of Premium Performance Shares is [Insert number equal to the number of Covered Performance Shares].

Other words and phrases used in these Performance Based Restricted Stock Award Terms are defined pursuant to paragraph 13 or elsewhere in these Performance Based Restricted Stock Award Terms.

2.Restricted Period. Subject to the limitations of these Performance Based Restricted Stock Award Terms, the “Restricted Period” for each Installment of Covered Performance Shares of the Performance Based Restricted Stock Award shall begin on the Grant Date and end as described below (but only if the Date of Termination has not occurred before the end of the Restricted Period):

(a) The Restricted Period shall end with respect to a number of the Covered Performance Shares determined by multiplying one quarter (1/4) of the Covered Performance Shares (the “First Installment”) by the applicable Performance Percentage on the later of the applicable Certification Date (as defined below) or the one-year anniversary of the Grant Date, if the Performance Goal has been fully or partially satisfied for the measurement period beginning on the Commencement

Date and ending on the one-year anniversary of the Commencement Date (the “First Installment Primary Performance Measurement Period”). If the Performance Goal with respect to the First Installment Primary Performance Measurement Period has not been fully satisfied such that the applicable Performance Percentage did not equal 100% for the First Installment Primary Performance Measurement Period, then the Restricted Period for all or a portion of the First Installment shall end on the earliest of the two-year, three-year, or four-year anniversary of the Grant Date (or, if later than the anniversary of the Grant Date, on the applicable Certification Date) on which the Performance Goal has been fully or partially satisfied for the measurement period beginning on the Commencement Date and ending on the two-year, three-year, or four-year anniversary of the Commencement Date, as applicable (each, a “First Installment Secondary Performance Measurement Period”) and the Performance Percentage as measured over any First Installment Secondary Performance Measurement Period is greater than it was over the First Installment Primary Performance Measurement Period or any previous First Installment Secondary Performance Measurement Period. For any First Installment Secondary Performance Measurement Period pursuant to which the conditions of the previous sentence have been met, the Restricted Period shall end with respect to a number of the Covered Performance Shares determined by multiplying the number of shares in the First Installment by the applicable Performance Percentage for such First Installment Secondary Performance Measurement Period minus the greatest applicable Performance Percentage taken into account in any previous Performance Measurement Period for the First Installment on the later of the applicable Certification Date (as defined below) or the applicable anniversary of the Grant Date.

(b) The Restricted Period shall end with respect to a number of the Covered Performance Shares determined by multiplying one quarter (1/4) of the Covered Performance Shares (the “Second Installment”) by the applicable Performance Percentage on the later of the applicable Certification Date or the two-year anniversary of the Grant Date, if the Performance Goal has been fully or partially satisfied for the measurement period beginning on the one-year anniversary of the Commencement Date and ending on the two-year anniversary of the Commencement Date (the “Second Installment Primary Performance Measurement Period”). If the Performance Goal with respect to the Second Installment Primary Performance Measurement Period has not been fully satisfied such that the applicable Performance Percentage did not equal 100% for the Second Installment Primary Performance Measurement Period, then the Restricted Period for all or a portion of the Second Installment shall end on the earlier of the three-year anniversary or the four-year anniversary of the Grant Date (or, if later than the anniversary of the Grant Date, on the applicable Certification Date) on which the Performance Goal has been fully or partially satisfied for the measurement period beginning on the one-year anniversary of the Commencement Date and ending on the three-year or four-year anniversary date of the Commencement Date, as applicable (each, a “Second Installment Secondary Performance Measurement Period”) and the Performance Percentage as measured over any Second Installment Secondary Performance Measurement Period is greater than it was over the Second Installment Primary Performance Measurement Period or any previous Second Installment Secondary Performance Measurement Period. For any Second Installment Secondary Performance Measurement Period pursuant to which the conditions of the previous sentence have been met, the Restricted Period shall end with respect to a number of the Covered Performance Shares determined by multiplying the number of shares in the Second Installment by the applicable Performance Percentage for such Second Installment Secondary Performance Measurement Period minus the greatest applicable Performance Percentage taken into account in any previous Performance Measurement Period for the Second Installment on the later of the applicable Certification Date (as defined below) or the applicable anniversary of the Grant Date.

(c) The Restricted Period shall end with respect to a number of the Covered Performance Shares determined by multiplying one quarter (1/4) of the Covered Performance Shares (the “Third Installment”) by the applicable Performance Percentage on the later of the applicable Certification Date or the three-year anniversary of the Grant Date, if the Performance Goal has been fully or partially satisfied for the measurement period beginning on the two-year anniversary of the Commencement Date and ending on the three-year anniversary of the Commencement Date (the “Third Installment Primary Performance Measurement Period”). If the Performance Goal with respect to the Third Installment Primary Performance Measurement Period has not been fully satisfied such that the applicable Performance Percentage did not equal 100% for the Third Installment Primary Performance Measurement Period, then the Restricted Period for all or a portion of the Third Installment shall end on the four-year anniversary of the Grant Date (or, if later than the anniversary of the Grant Date, on the applicable Certification Date) if the Performance Goal has been fully or partially satisfied for the measurement period beginning on the two-year anniversary of the Commencement Date and ending on the four-year anniversary of the Commencement Date (the “Third Installment Secondary Performance Measurement Period”) and the Performance Percentage as measured over the Third Installment Secondary Performance Measurement Period is greater than it was over the Third Installment Primary Performance Measurement Period. If, for the Third Installment Secondary Performance Measurement Period, the conditions of the previous sentence have been met, the Restricted Period shall end with respect to a number of the Covered Performance Shares determined by multiplying the number of shares in the Third Installment by the applicable Performance Percentage for such Third Installment Secondary Performance Measurement Period minus the applicable Performance Percentage taken into account for the Third Installment Primary Performance Measurement Period on the later of the applicable Certification Date (as defined below) or the applicable anniversary of the Grant Date.

(d) The Restricted Period shall end with respect to a number of the Covered Performance Shares determined by multiplying one quarter (1/4) of the Covered Performance Shares (the “Fourth Installment”) by the applicable Performance Percentage on the later of the applicable Certification Date or the four-year anniversary of the Grant Date, if the Performance Goal has been fully or partially satisfied for the measurement period beginning on the three-year anniversary of the Commencement Date and ending on the four-year anniversary of the Commencement Date (which measurement period shall be both the “Fourth Installment Primary Performance Measurement Period” and the “Fourth Installment Secondary Performance Measurement Period”).

(e) If the Cumulative Performance of the Company during the period beginning on the Commencement Date and ending on the four-year anniversary of the Commencement Date (the “Four-Year Performance Measurement Period”) is greater than the Cumulative Performance of 50% of the Peer Companies, the Restricted Period shall end for any Covered Performance Shares that have not previously vested in accordance with this paragraph 2 on the date the Committee certifies that the requisite Cumulative Performance has been achieved during the applicable Four-Year Performance Measurement Period (which date of certification is the “Cumulative Performance Certification Date”).

For the avoidance of doubt, the Restricted Period with respect to any Installment shall end only upon the Committee’s certification that the Performance Goal with respect to such Installment for the applicable Performance Measurement Period has been satisfied (which date of certification with respect to any Installment is the “Certification Date” applicable to such Installment).

3.Retirement. If the Participant’s Date of Termination occurs because of Retirement, then for any Covered Performance Shares and any Premium Performance Shares as to which the Restricted Period has not otherwise ended prior to the Date of Termination, the Participant shall become vested and the Restricted Period shall end for any Covered Performance Shares if and when the terms of paragraph 2 are satisfied with respect to such Covered Performance Shares and for any Premium Performance Shares if and when the terms of paragraph 7 are satisfied with respect to such Premium Performance Shares, in each case, determined as though the Participant had remained employed and the Date of Termination had not occurred prior to the end of any applicable Restricted Period for purposes of this Agreement.

4.Death, Long-Term Disability and Change in Control. Notwithstanding the provisions of paragraph 2, the Restricted Period for one or more Installments of Covered Performance Shares shall end prior to the date specified in the schedule set forth in paragraph 2 to the extent set forth below:

(a) For Covered Performance Shares as to which the Restricted Period has not ended prior to the Date of Termination, the Restricted Period for such Covered Performance Shares shall end upon the Participant’s Date of Termination, and the Installments shall vest upon the Date of Termination, if the Date of Termination occurs by reason of the Participant’s death.

(b) For Covered Performance Shares as to which the Restricted Period has not ended prior to the Date of Termination, the Restricted Period for such Covered Performance Shares shall end upon the Participant’s Date of Termination, and the Installments shall vest upon the Date of Termination, if the Date of Termination occurs by reason of the Participant’s Long-Term Disability.

(c) If the Participant's Date of Termination is a Change in Control Date of Termination, then, for Covered Performance Shares, if any, as to which the Restricted Period has not ended prior to the Participant’s Date of Termination, the Restricted Period for such Covered Performance Shares will end on the Change in Control Date of Termination; provided that if the Participant's Change in Control Date of Termination occurs within the 180-day period immediately preceding the date of a Change in Control, then the Restricted Period for all unvested Covered Performance Shares held by the Participant on the Date of Termination will end, and those Covered Performance Shares will vest on the date of a Change in Control.

5.Qualifying Termination. Notwithstanding the provisions of paragraph 2, for Installments of Covered Performance Shares as to which the Restricted Period has not ended prior to the Date of Termination and the Date of Termination occurs by reason of the Participant’s Qualifying Termination, vesting shall continue pursuant to the schedule set forth in paragraph 2 following the Date of Termination as though the Participant continued to be employed through the two-year anniversary of the Participant’s Date of Termination, subject to the Participant not engaging in any Competitive Activity during such two-year period and subject to the Participant signing and not revoking a general release and waiver of all claims against the Company and such release is effective no later than the sixty-day anniversary of the Date of Termination. If such release is not effective within such sixty-day period or in the event that the Participant engages in a Competitive Activity prior to the last day of the Restricted Period for any Installment, the Participant shall immediately forfeit any unvested Installments of Covered Performance Shares.

6.Transfer and Forfeiture of Shares. The transfer and forfeiture of shares shall be subject to the following:

(a) Except as provided in paragraphs 3, 4 and 5 above, the Participant will be vested in any Covered Performance Shares if the Date of Termination has not occurred prior to the last day of the Restricted Period with respect to those shares and the requirements of paragraph 2 have been satisfied. Upon vesting at the end of such Restricted Period, those shares will be delivered to the Participant free of all restrictions.

(b) Except as otherwise determined by the Committee and as provided in paragraphs 3, 4 and 5 above, the Participant shall forfeit any Covered Performance Shares as of the Date of Termination, if such Date of Termination occurs prior to vesting of those shares. Any Covered Performance Shares that have not vested as of the end of the Restricted Period that includes the Four-Year Performance Measurement Period shall be forfeited by the Participant as of the Cumulative Performance Certification Date.

(c) Notwithstanding anything to the contrary in any agreement between the Participant and the Company or a Subsidiary, the Participant acknowledges and agrees that the Covered Performance Shares and Premium Performance Shares shall vest (and the Restricted Period shall end) only as provided by, and subject to the terms of, this Performance Based Restricted Stock Award.

7.Premium Performance Shares. The vesting of the Premium Performance Shares under this paragraph 7 will be based on the Cumulative Performance of Chubb Limited during the Four-Year Performance Measurement Period and will be determined as follows:

(a) The Restricted Period shall end for the number of the Premium Performance Shares determined by multiplying the number of Covered Performance Shares that became vested pursuant to the terms of paragraph 2 by the Premium Award Performance Percentage (as determined below).

(b) The Premium Award Performance Percentage will be determined in accordance with the following schedule:

If the Cumulative Performance of Chubb Limited during the Four-Year Performance Measurement Period:	The Premium Award Performance Percentage will be:
Does not exceed the 50th percentile of the Cumulative Performance of the Peer Companies	0%
Exceeds the 50th percentile, but does not exceed the 65th percentile, of the Cumulative Performance of the Peer Companies	0%, as increased to the extent, if any, provided pursuant to the following provisions of this paragraph (b)
Exceeds the 65th percentile, but does not exceed the 75th percentile, of the Cumulative Performance of the Peer Companies	50%, as increased to the extent, if any, provided pursuant to the following provisions of this paragraph (b)
Exceeds the 75th percentile of the Cumulative Performance of the Peer Companies	100%
If the Cumulative Performance of Chubb Limited exceeds the 50th percentile but does not exceed the 65th percentile of the Cumulative Performance of the Peer Companies during the Four-Year Performance Measurement Period, then the Premium Award Performance Percentage will be a percentage between 0% and 50%, based on an interpolation of the Chubb Limited Cumulative Performance falling between the 50th percentile and 65th percentile of the Cumulative Performance of the Peer Companies during the Four-Year Performance Measurement Period. If the Cumulative Performance of Chubb Limited exceeds the 65th percentile but does not exceed the 75th percentile of the Cumulative Performance of the Peer Companies during the Four-Year Performance Measurement Period, then the Premium Award Performance Percentage will be a percentage between 50% and 100%, based on an interpolation of the Chubb Limited Cumulative Performance falling between the 65th percentile and 75th percentile of the Cumulative Performance of the Peer Companies during the Four-Year Performance Measurement Period.

(c) Notwithstanding the foregoing provisions of this paragraph 7, the Participant shall vest in the number of Premium Performance Shares determined above on the later of the Cumulative Performance Certification Date or the four-year anniversary of the Grant Date, but only if the Committee certifies that the requisite Cumulative Performance has been achieved during the applicable Four-Year Performance Measurement Period on the Cumulative Performance Certification Date. Upon vesting at the end of such Restricted Period, those shares will be delivered to the Participant free of all restrictions. Except as provided in paragraph 3 for a Date of Termination that occurs because of Retirement, the Participant shall not be entitled to vesting of any Premium Performance Shares if the Date of Termination occurs before the later of the Cumulative Performance Certification Date or the four-year anniversary of the Grant Date for any reason.

8.Withholding. All deliveries and distributions and the vesting of shares of stock under these Performance Based Restricted Stock Award Terms are subject to withholding of all applicable taxes. At the election of the Participant, and subject to such rules and limitations as may be established by the Committee from time to time, such withholding obligations may be satisfied through the surrender of shares of Stock which the Participant already owns, or to which the Participant is otherwise entitled under the Plan; provided, however, that such shares may be used to satisfy not more than the Company’s

minimum statutory withholding obligation (based on minimum statutory withholding rates for Federal and state tax purposes, including payroll taxes, that are applicable to such supplemental taxable income).

9.Transferability. Except as otherwise provided by the Committee, awards under these Performance Based Restricted Stock Award Terms may not be sold, assigned, transferred, pledged or otherwise encumbered prior to vesting and delivery.

10.Dividends. Dividends paid with respect to the Covered Performance Shares and the Premium Performance Shares with respect to record dates on or after the Grant Date for such shares but prior to the end of the Restricted Period for such shares shall be accumulated and distributed to the Participant on the date that the Restricted Period ends with respect to the share pursuant to which such dividend was paid; provided, however that no dividends or distributions shall be payable to or for the benefit of the Participant with respect to record dates for such dividends or distributions for any Covered Performance Shares or Premium Performance Shares occurring on or after the date, if any, on which the Participant has forfeited those shares. Notwithstanding the foregoing, if the right to the payment of dividends with respect to a Covered Performance Share or a Premium Performance Share would otherwise constitute nonqualified deferred compensation subject to Section 457A of the Internal Revenue Code (“Code Section 457A”), then, (i) any dividends accumulated in relation to Covered Performance Shares and Premium Performance Shares as of the date that the right to receive such payments is no longer treated as subject to a substantial risk of forfeiture for purposes of Code Section 457A (the “457A Vesting Date”) shall be used to purchase additional Covered Performance Shares and Premium Performance Shares subject to the same vesting provisions of the original Covered Performance Shares and Premium Performance Shares to which such accumulated dividends relate and any remaining unused cash amounts that are not sufficient to purchase an additional share shall be distributed to the Participant and (ii) any dividends that are paid on or after the 457A Vesting Date but prior to the vesting of the Covered Performance Shares and Premium Performance Shares shall be used to purchase additional Covered Performance Shares and Premium Performance Shares subject to the same vesting provisions of the original Covered Performance Shares and Premium Performance Shares to which such dividends relate and any remaining unused cash amounts that are not sufficient to purchase an additional share shall be distributed to the Participant.

11.Voting. The Participant shall not be prevented from voting the Covered Performance Shares merely because those shares are subject to the restrictions imposed by these Performance Based Restricted Stock Award Terms and the Plan; provided, however, that the Participant shall not be entitled to vote Covered Performance Shares with respect to record dates for any Covered Performance Shares occurring on or after the date, if any, on which the Participant has forfeited those shares. The Participant acknowledges and agrees that he or she shall not be entitled to vote any Premium Performance Shares if the record date for entitlement to voting occurs prior to the date on which such shares become vested pursuant to paragraph 7.

12.Deposit of Performance Based Restricted Stock Award. Each certificate issued in respect of the Covered Performance Shares and Premium Performance Shares awarded under these Performance Based Restricted Stock Award Terms shall be registered in the name of the Participant and shall be deposited in a bank designated by the Committee.

13.Definitions. For purposes of these Performance Based Restricted Stock Award Terms, words and phrases shall be defined as follows:

(a) Cause. The term “Cause” shall mean - unless otherwise defined in an employment agreement between the Participant and the Company or Subsidiary - the occurrence of any of the following:

(i) a conviction of the Participant with respect to a (x) felony or (y) a misdemeanor involving moral turpitude; or

(ii) willful misconduct or gross negligence by the Participant resulting, in either case, in harm to the Company or any Subsidiary; or

(iii) failure by the Participant to carry out the lawful and reasonable directions of the Board or the Participant’s immediate supervisor, as the case may be; or

(iv) refusal to cooperate or non-cooperation by the Participant with any governmental regulatory authority; or

(v) fraud, embezzlement, theft or dishonesty by the Participant against the Company or any Subsidiary or a material violation by the Participant of a policy or procedure of the Company, resulting, in any case, in harm to the Company or any Subsidiary.

(b) Change in Control. The term “Change in Control” shall be defined as set forth in the Plan.

(c) Change in Control Date Termination. The term “Change in Control Date of Termination”means the Participant’s Date of Termination that occurs because the Company and/or any of the Related Companies terminates the Participant’s employment with the Company and/or the Related Companies without Cause (other than due to death, a Long-Term Disability or a Retirement) or because the Participant terminates his or her employment for Good Reason, provided that such termination in accordance with this paragraph 13(c) occurs during the period commencing on the 180th day immediately preceding a Change in Control date and ending on the two-year anniversary of such Change in Control date.

(d) Competitive Activity - The term “Competitive Activity” means the Participant’s: (i) engagement in an activity - whether as an employee, consultant, principal, member, agent, officer, director, partner or shareholder (except as a less than 1% shareholder of a publicly traded company) - that is competitive with any business of the Company or any Subsidiary conducted by the Company or such Subsidiary during the Participant’s employment with the Company or the two-year period following the Date of Termination; (ii) solicitation of any client and/or customer of the Company or any affiliate with respect to an activity prohibited by subparagraph (d)(i); (iii) solicitation or employment of any employee of the Company or any affiliate for the purpose of causing such employee to terminate his or her employment with the Company or such affiliate; or (iv) failure to keep confidential all Company trade secrets, proprietary and confidential information.

(e) Cumulative Performance. The term “Cumulative Performance” means, as to Chubb Limited or the Peer Companies, the growth in tangible book value per common shares outstanding as reported under GAAP for Chubb Limited or the Peer Companies during the Four-Year Performance Measurement Period beginning on the Commencement Date and ending on the fourth anniversary of the Commencement Date. The determination of the Cumulative Performance and its parameters is subject to rules established by the Committee within 90 days of the beginning of the Four-Year Performance Measurement Period. The Committee, in its discretion, may adjust the reported tangible book value for Chubb Limited or the Peer Companies for any Four-Year Performance Measurement Period; provided, however, that no such adjustment may result in an increase in the number of Covered Performance Shares or Premium Performance Shares which vest (as described in paragraph 7) over the number of shares that would have otherwise vested had the reported tangible book value for either Chubb Limited or the Peer Companies not been adjusted.

(f) Date of Termination. A Participant’s “Date of Termination” means, with respect to an employee, the date on which the Participant’s employment with the Company and the Subsidiaries terminates for any reason, and with respect to a Director, the date immediately following the last day on which the Participant serves as a Director; provided that a Date of Termination shall not be deemed to occur by reason of a Participant’s transfer of employment between the Company and a Subsidiary or between two Subsidiaries; further provided that a Date of Termination shall not be deemed to occur by reason of a Participant’s cessation of service as a Director if immediately following such cessation of service the Participant becomes or continues to be employed by the Company or a Subsidiary, nor by reason of a Participant’s termination of employment with the Company or a Subsidiary if immediately following such termination of employment the Participant becomes or continues to be a Director; and further provided that a Participant’s employment shall not be considered terminated while the Participant is on a leave of absence from the Company or a Subsidiary approved by the Participant’s employer.

(g) Director. The term “Director” means a member of the Board, who may or may not be an employee of the Company or a Subsidiary.

(h) Forfeiture Payment. The term “Forfeiture Payment” means the pre-tax proceeds from sales or other transfers, if any, of the number of shares of Stock that became vested during the Restrictive Covenant Period pursuant to this Agreement and that the Participant has sold or otherwise transferred prior to the date of repayment required pursuant to subparagraph 21(b). For purposes of this definition, pre-tax proceeds for any shares of Stock that were transferred by the Participant in a transaction other than a sale on the New York Stock Exchange means the Fair Market Value of such shares on the New York Stock Exchange as of the date of such transaction.

(i) Forfeiture Shares.  The term “Forfeiture Shares” means the number of shares of Stock that became vested during the Restrictive Covenant Period pursuant to this Agreement and that remain held by the Participant as of the date of repayment required pursuant to subparagraph 21(b). It is the Participant’s responsibility to ensure that the shares of Stock delivered as Forfeiture Shares are the shares of Stock delivered previously pursuant to this Agreement. In the absence of Company records or written documentation from Participant’s broker demonstrating this fact, the Participant must deliver to the Company the Forfeiture Payment determined as of the date that such shares of Stock delivered pursuant to this Agreement are transferred from Participant’s stock account or otherwise become indistinguishable from other shares of Stock that the Participant may hold.

(j) Good Reason. The term “Good Reason”shall mean - unless otherwise defined in an in-force employment agreement between the Participant and the Company or Subsidiary - the occurrence of any of the following within the 60-day period preceding a Date of Termination without the Participant’s prior written consent:

(i) a material adverse diminution of the Participant’s titles, authority, duties or responsibilities, or the assignment to the Participant of titles, authority, duties or responsibilities that are materially inconsistent with his or her titles, authority, duties and/or responsibilities in a manner materially adverse to the Participant; or

(ii) a reduction in the Participant’s base salary or annual bonus opportunity (other than any reduction applicable to all similarly situated Executives generally); or

(iii) a failure of the Company to obtain the assumption in writing of its obligations under the Plan by any successor to all or substantially all of the assets of the Company within 45 days after a merger, consolidation, sale or similar transaction that qualifies as a Change in Control.

(k) Long-Term Disability. A Participant shall be considered to have a “Long-Term Disability” if the Participant is determined to be eligible for long-term disability benefits under the long-term disability plan in which the Participant participates and which is sponsored by the Company or a Subsidiary; or if the Participant does not participate in a long-term disability plan sponsored by the Company or a Subsidiary, then the Participant shall be considered to have a “Long-Term Disability” if the Committee determines, under standards comparable to those of the Company’s long-term disability plan, that the Participant would be eligible for long-term disability benefits if he or she participated in such plan.

(l) Peer Companies. The term “Peer Companies” means the companies which are in the Chubb Financial Performance Peer Group as determined by the Committee within 90 days of the beginning of the applicable Performance Period and for which financial information is available for all year(s) in such Performance Measurement Period.

(m) Performance Goal. The term “Performance Goal” for any Primary Performance Measurement Period or Secondary Performance Measurement Period means the achievement by Chubb Limited of growth in tangible book value per common shares outstanding as reported under GAAP during such Performance Measurement Period, as compared to the growth in tangible book value per common shares outstanding as reported under GAAP during the same Performance Measurement Period by the Peer Companies. The determination of the Performance Goal and its parameters is subject to rules established by the Committee within 90 days of the beginning of the applicable Performance Measurement Period. The Committee, in its discretion, may adjust the reported tangible book value for Chubb Limited or the Peer Companies for any Primary Performance Measurement Period or Secondary Performance Measurement Period; provided, however, that no such adjustment may result in an increase in the number of Covered Performance Shares which are earned and vested at the end of any such Performance Measurement Period over the number of Covered Performance Shares that would have been earned and vested had the reported tangible book value for either Chubb Limited or the Peer Companies not been adjusted.

(n) Performance Measurement Period. The term “Performance Measurement Period” shall mean the Primary Performance Measurement Period or the Secondary Performance Measurement Period, as applicable, with respect to an Installment of Covered Performance Shares; and shall mean the Four-Year Performance Measurement Period with respect to the Covered Performance Shares as described in paragraph 2(e) and Premium Performance Shares as described in paragraph 7.

(o) Performance Percentage. The term “Performance Percentage” shall mean the applicable Performance Percentage determined based on the achievement of the Performance Goal over a Performance Measurement Period by Chubb Limited as compared to the Peer Companies:

If the Satisfaction of Chubb Limited of the Performance Goal during the applicable Performance Measurement Period:	The Performance Percentage will be:
Does not exceed the 25th percentile of the satisfaction of the Performance Goal of the Peer Companies	0%
Exceeds the 25th percentile, but does not exceed the 50th percentile, of the satisfaction of the Performance Goal of the Peer Companies	50%, as increased to the extent, if any, provided pursuant to the following provisions of this paragraph (o)
Exceeds the 50th percentile of the satisfaction of the Performance Goal of the Peer Companies	100%

If the performance of Chubb Limited exceeds the 25th percentile but does not exceed the 50th percentile of the satisfaction of the Performance Goal of the Peer Companies during the applicable Performance Period, then the Performance Percentage will be a percentage between 50% and 100%, based on an interpolation of the Chubb Limited performance falling between the 25th percentile and 50th percentile of the satisfaction of the Performance Goal of the Peer Companies during the applicable Performance Period.

(p) Qualifying Termination. The term “Qualifying Termination” means the Participant’s Date of Termination that occurs because the Company and/or any of the Related Companies terminates the Participant’s employment with the Company and/or the Related Companies without Cause. For the avoidance of doubt, the termination of the Participant’s employment due to death or Long-Term Disability, or a voluntary termination of the Participant’s employment by the Participant for any reason (including Good Reason or Retirement) shall not constitute a Qualifying Termination for the purposes of this Agreement.

(q) Restrictive Covenant Period. The term “Restrictive Covenant Period” means the twenty-four month period following a Date of Termination due to a Qualifying Termination or a Retirement.

(r) Retirement. The term “Retirement” means the Participant’s Date of Termination that occurs on or after the Participant has both completed at least ten years of service with the Company or a Subsidiary and attained at least age 62; provided, however, that a Date of Termination will not be treated as a Retirement unless the Participant (i) has terminated employment in good standing with the Company or a Subsidiary, and (ii) executes an agreement and release as required by the Company which will include, without limitation, a general release, and non-competition and non-solicitation provisions.  A Participant shall be deemed to have executed a release as described in clause (ii) above only if such release is returned by such time as is established by the Company; provided that to the extent benefits provided pursuant to the Plan would be considered to be provided under a nonqualified deferred compensation plan as that term is defined in Treas. Reg. §1.409A-1, such benefits shall be paid to the Participant only if the release is returned in time to permit the distribution of the benefits to satisfy the requirements of Section 409A of the Internal Revenue Code with respect to the time of payment.

14.Plan Definitions. Except where the context clearly implies or indicates the contrary, a word, term, or phrase used in the Plan is similarly used in these Performance Based Restricted Stock Award Terms.

15.Heirs and Successors. These Performance Based Restricted Stock Terms shall be binding upon, and inure to the benefit of, the Company and its successors and assigns, and upon any person acquiring, whether by merger, consolidation, purchase of assets or otherwise, all or substantially all of the Company’s assets and business. If any benefits deliverable to the Participant under these Performance Based Restricted Stock Terms have not been delivered at the time of the Participant’s death, such benefits shall be delivered to the Designated Beneficiary, in accordance with the provisions of these Performance Based Restricted Stock Terms and the Plan. The “Designated Beneficiary” shall be the beneficiary or beneficiaries designated by the Participant in a writing filed with the Committee in such form and at such time as the Committee shall require. If a deceased Participant fails to designate a beneficiary, or if the Designated Beneficiary does not survive the Participant, any rights that would have been exercisable by the Participant and any benefits distributable to the Participant shall be distributed to the legal representative of the estate of the Participant. If a deceased Participant designates a beneficiary and the Designated Beneficiary survives the Participant but dies before the complete distribution of benefits to the Designated Beneficiary under these Performance Based Restricted Stock Terms, then any benefits distributable to the Designated Beneficiary shall be distributed to the legal representative of the estate of the Designated Beneficiary.

16.Administration. The authority to manage and control the operation and administration of these Performance Based Restricted Stock Award Terms shall be vested in the Committee, and the Committee shall have all powers with respect to these Performance Based Restricted Stock Award Terms as it has with respect to the Plan. Any interpretation of these Performance Based Restricted Stock Award Terms by the Committee and any decision made by it with respect to these Performance Based Restricted Stock Award Terms are final and binding on all persons.

17.Plan and Corporate Records Govern. Notwithstanding anything in these Performance Based Restricted Stock Award Terms to the contrary, these Performance Based Restricted Stock Award Terms shall be subject to the terms of the Plan, a copy of which may be obtained by the Participant from the office of the Secretary of the Company; and these Performance Based Restricted Stock Award Terms are subject to all interpretations, amendments, rules and regulations promulgated by the Committee from time to time pursuant to the Plan. Notwithstanding anything in the Performance Based Restricted Stock Terms to the contrary, in the event of any discrepancies between the corporate records regarding this award and the Record-Keeping System, the corporate records shall control.

18.Not An Employment Contract. The Performance Based Restricted Stock Award will not confer on the Participant any right with respect to continuance of employment or other service with the Company or any Subsidiary, nor will it interfere in any way with any right the Company or any Subsidiary would otherwise have to terminate or modify the terms of such Participant’s employment or other service at any time.

19.Notices. Any written notices provided for in these Performance Based Restricted Stock Award Terms or the Plan shall be in writing and shall be deemed sufficiently given if either hand delivered or if sent by fax or overnight courier, or by postage paid first class mail. Notices sent by mail shall be deemed received three business days after mailing but in no event later than the date of actual receipt. Notices shall be directed, if to the Participant, at the Participant’s address indicated by the Company’s records, or if to the Company, at the Company’s principal executive office.

20.Fractional Shares. In lieu of issuing a fraction of a share, resulting from an adjustment of the Performance Based Restricted Stock Award pursuant to paragraph 5.2(f) of the Plan or otherwise, the

Company will be entitled to pay to the Participant an amount equal to the fair market value of such fractional share.

21.Competitive Activity.

(a)The Committee may cancel, rescind, suspend, withhold or otherwise limit or restrict the Performance Based Restricted Stock Award at any time if the Participant engages in any "Competitive Activity".

(b)Immediately prior to the vesting of the shares of Stock pursuant to this Agreement, the Participant shall certify, to the extent required by the Committee, in a manner acceptable to the Committee, that the Participant is not engaging and has not engaged in any Competitive Activity. In the event a Participant has engaged in any Competitive Activity during the Restrictive Covenant Period, then the Participant shall be required to transfer the Forfeiture Shares to the Company and, if applicable, pay the Forfeiture Payment to the Company, in such manner and on such terms and conditions as may be required by the Committee, and the Company shall be entitled to set-off such amounts against any amount owed to the Participant by the Company and/or Subsidiary.

22.Amendment. These Performance Based Restricted Stock Award Terms may be amended in accordance with the provisions of the Plan, and may otherwise be amended by written agreement of the Participant and the Company without the consent of any other person.

IN WITNESS WHEREOF, the Company has caused these presents to be executed in its name and on its behalf, all as of the Grant Date.

CHUBB LIMITED

By:

Its:

I hereby agree to all the terms, restrictions and conditions set forth in the Agreement:

Participant

EX-10.74

Exhibit 10.74

Chubb Limited

Performance Based Restricted Stock Award Terms

under the

ACE Limited 2004 Long-Term Incentive Plan

The Participant has been granted a Performance Based Restricted Stock Award by Chubb Limited (the “Company”) under the ACE Limited 2004 Long-Term Incentive Plan (the “Plan”). The shares of Stock granted as Covered Performance Shares and Premium Performance Shares pursuant to this Performance Based Restricted Stock Award shall be subject to the following Performance Based Restricted Stock Award Terms:

1.Terms of Award. The following words and phrases used in these Performance Based Restricted Stock Award Terms shall have the meanings set forth in this paragraph 1:

(a) The “Participant” is [Insert Name], who is the individual recipient of the Performance Based Restricted Stock Award on the specified Grant Date.

(b) The “Grant Date” is [Insert Date].

(c) The “Commencement Date” is [Insert Date].

(d) The number of “Covered Performance Shares” is [Insert Number], which is 50% [75% for Chief Executive Officer][66% for Vice Chairman and COO] of that portion of the Participant’s annual Long-Term Incentive Award which is granted in the form of restricted shares for the year in which the Grant Date occurs, as reflected in the corporate records and shown in the Record-Keeping System in the Participant’s individual account records.

(e) The number of “Premium Performance Shares” is [Insert number equal to the number of Covered Performance Shares].

(f) The “Service Period” is the period beginning on the Grant Date and ending on the earliest to occur of the (i) four-year anniversary of the Grant Date; (ii) the Date of Termination if the Date of Termination occurs by reason of the Participant’s death or Long-Term Disability, and (iii) the Date of Termination if the Date of Termination is a Change in Control Termination.

Other words and phrases used in these Performance Based Restricted Stock Award Terms are defined pursuant to paragraph 13 or elsewhere in these Performance Based Restricted Stock Award Terms.

2.Restricted Period. Subject to the limitations of these Performance Based Restricted Stock Award Terms, the “Restricted Period” for each Installment of Covered Performance Shares of the Performance Based Restricted Stock Award shall begin on the Grant Date and end as described below (but only if the Date of Termination has not occurred before the end of the Restricted Period):

(a) The Restricted Period shall end with respect to a number of the Covered Performance Shares determined by multiplying one quarter (1/4) of the Covered Performance Shares (the “First Installment”) by the applicable Performance Percentage on the later of the applicable Certification Date (as defined below) or the one-year anniversary of the Grant Date, if the Performance Goal has been fully or partially satisfied for the measurement period beginning on the Commencement Date and ending on the one-year anniversary of the Commencement Date (the “First Installment Primary Performance Measurement Period”). If the Performance Goal with respect to the First Installment Primary Performance Measurement Period has not been fully satisfied such that the applicable Performance Percentage did not equal 100% for the First Installment Primary Performance Measurement Period, then the Restricted Period for all or a portion of the First Installment shall end on the earliest of the two-year, three-year, or four-year anniversary of the Grant Date (or, if later than the anniversary of the Grant Date, on the applicable Certification Date) on which the Performance Goal has been fully or partially satisfied for the measurement period beginning on the Commencement Date and ending on the two-year, three-year, or four-year anniversary of the Commencement Date, as applicable (each, a “First Installment Secondary Performance Measurement Period”) and the Performance Percentage as measured over any First Installment Secondary Performance Measurement Period is greater than it was over the First Installment Primary Performance Measurement Period or any previous First Installment Secondary Performance Measurement Period. For any First Installment Secondary Performance Measurement Period pursuant to which the conditions of the previous sentence have been met, the Restricted Period shall end with respect to a number of the Covered Performance Shares determined by multiplying the number of shares in the First Installment by the applicable Performance Percentage for such First Installment Secondary Performance Measurement Period minus the greatest applicable Performance Percentage taken into account in any previous Performance Measurement Period for the First Installment on the later of the applicable Certification Date (as defined below) or the applicable anniversary of the Grant Date.

(b) The Restricted Period shall end with respect to a number of the Covered Performance Shares determined by multiplying one quarter (1/4) of the Covered Performance Shares (the “Second Installment”) by the applicable Performance Percentage on the later of the applicable Certification Date or the two-year anniversary of the Grant Date, if the Performance Goal has been fully or partially satisfied for the measurement period beginning on the one-year anniversary of the Commencement Date and ending on the two-year anniversary of the Commencement Date (the “Second Installment Primary Performance Measurement Period”). If the Performance Goal with respect to the Second Installment Primary Performance Measurement Period has not been fully satisfied such that the applicable Performance Percentage did not equal 100% for the Second Installment Primary Performance Measurement Period, then the Restricted Period for all or a portion of the Second Installment shall end on the earlier of the three-year anniversary or the four-year anniversary of the Grant Date (or, if later than the anniversary of the Grant Date, on the applicable Certification Date) on which the Performance Goal has been fully or partially satisfied for the measurement period beginning on the one-year anniversary of the Commencement Date and ending on the three-year or four-year anniversary date of the Commencement Date, as applicable (each, a “Second Installment Secondary Performance Measurement Period”) and the Performance Percentage as measured over any Second Installment Secondary Performance Measurement Period is greater than it was over the Second Installment Primary Performance Measurement Period or any previous Second Installment Secondary Performance Measurement Period. For any Second Installment Secondary Performance Measurement Period pursuant to which the conditions of the previous sentence have been met, the Restricted Period shall end with respect to a number of the Covered Performance Shares determined by multiplying the number of

shares in the Second Installment by the applicable Performance Percentage for such Second Installment Secondary Performance Measurement Period minus the greatest applicable Performance Percentage taken into account in any previous Performance Measurement Period for the Second Installment on the later of the applicable Certification Date (as defined below) or the applicable anniversary of the Grant Date.

(c) The Restricted Period shall end with respect to a number of the Covered Performance Shares determined by multiplying one quarter (1/4) of the Covered Performance Shares (the “Third Installment”) by the applicable Performance Percentage on the later of the applicable Certification Date or the three-year anniversary of the Grant Date, if the Performance Goal has been fully or partially satisfied for the measurement period beginning on the two-year anniversary of the Commencement Date and ending on the three-year anniversary of the Commencement Date (the “Third Installment Primary Performance Measurement Period”). If the Performance Goal with respect to the Third Installment Primary Performance Measurement Period has not been fully satisfied such that the applicable Performance Percentage did not equal 100% for the Third Installment Primary Performance Measurement Period, then the Restricted Period for all or a portion of the Third Installment shall end on the four-year anniversary of the Grant Date (or, if later than the anniversary of the Grant Date, on the applicable Certification Date) if the Performance Goal has been fully or partially satisfied for the measurement period beginning on the two-year anniversary of the Commencement Date and ending on the four-year anniversary of the Commencement Date (the “Third Installment Secondary Performance Measurement Period”) and the Performance Percentage as measured over the Third Installment Secondary Performance Measurement Period is greater than it was over the Third Installment Primary Performance Measurement Period. If, for the Third Installment Secondary Performance Measurement Period, the conditions of the previous sentence have been met, the Restricted Period shall end with respect to a number of the Covered Performance Shares determined by multiplying the number of shares in the Third Installment by the applicable Performance Percentage for such Third Installment Secondary Performance Measurement Period minus the applicable Performance Percentage taken into account for the Third Installment Primary Performance Measurement Period on the later of the applicable Certification Date (as defined below) or the applicable anniversary of the Grant Date.

(d) The Restricted Period shall end with respect to a number of the Covered Performance Shares determined by multiplying one quarter (1/4) of the Covered Performance Shares (the “Fourth Installment”) by the applicable Performance Percentage on the later of the applicable Certification Date or the four-year anniversary of the Grant Date, if the Performance Goal has been fully or partially satisfied for the measurement period beginning on the three-year anniversary of the Commencement Date and ending on the four-year anniversary of the Commencement Date (which measurement period shall be both the “Fourth Installment Primary Performance Measurement Period” and the “Fourth Installment Secondary Performance Measurement Period”).

(e) If the Cumulative Performance of the Company during the period beginning on the Commencement Date and ending on the four-year anniversary of the Commencement Date (the “Four-Year Performance Measurement Period”) is greater than the Cumulative Performance of 50% of the Peer Companies, the Restricted Period shall end for any Covered Performance Shares that have not previously vested in accordance with this paragraph 2 on the date the Committee certifies that the requisite Cumulative Performance has been achieved during the applicable Four-Year Performance Measurement Period (which date of certification is the “Cumulative Performance Certification Date”).

For the avoidance of doubt, the Restricted Period with respect to any Installment shall end only upon the Committee’s certification that the Performance Goal with respect to such Installment for the applicable Performance Measurement Period has been satisfied (which date of certification with respect to any Installment is the “Certification Date” applicable to such Installment). Following the end of the Restricted Period, the Covered Performance Shares shall remain subject to the restrictions of this Agreement and may not be transferred by the Participant prior to the end of the Service Period as provided pursuant to paragraph 6.

3.Retirement. If the Participant’s Date of Termination occurs because of Retirement, then for any Covered Performance Shares and any Premium Performance Shares as to which the Restricted Period has not otherwise ended prior to the Date of Termination, the Participant shall become vested and the Restricted Period shall end for any Covered Performance Shares if and when the terms of paragraph 2 are satisfied with respect to such Covered Performance Shares and for any Premium Performance Shares if and when the terms of paragraph 7 are satisfied with respect to such Premium Performance Shares, in each case, determined as though the Participant had remained employed and the Date of Termination had not occurred prior to the end of any applicable Restricted Period or Service Period for purposes of this Agreement.

4.Death, Long-Term Disability and Change in Control. Notwithstanding the provisions of paragraph 2, the Restricted Period for one or more Installments of Covered Performance Shares shall end prior to the date specified in the schedule set forth in paragraph 2 to the extent set forth below:

(a) For Covered Performance Shares as to which the Restricted Period has not ended prior to the Date of Termination, the Restricted Period for such Covered Performance Shares shall end upon the Participant’s Date of Termination, and the Installments shall vest upon the Date of Termination, if the Date of Termination occurs by reason of the Participant’s death.

(b) For Covered Performance Shares as to which the Restricted Period has not ended prior to the Date of Termination, the Restricted Period for such Covered Performance Shares shall end upon the Participant’s Date of Termination, and the Installments shall vest upon the Date of Termination, if the Date of Termination occurs by reason of the Participant’s Long-Term Disability.

(c) If the Participant's Date of Termination is a Change in Control Date of Termination, then, for Covered Performance Shares, if any, as to which the Restricted Period has not ended prior to the Participant’s Date of Termination, the Restricted Period for such Covered Performance Shares will end on the Change in Control Date of Termination; provided that if the Participant's Change in Control Date of Termination occurs within the 180-day period immediately preceding the date of a Change in Control, then the Restricted Period for all unvested Covered Performance Shares held by the Participant on the Date of Termination will end, and those Covered Performance Shares will vest on the date of a Change in Control.

5.Qualifying Termination. Notwithstanding the provisions of paragraph 2, for Installments of Covered Performance Shares as to which the Restricted Period has not ended prior to the Date of Termination and the Date of Termination occurs by reason of the Participant’s Qualifying Termination, vesting shall continue pursuant to the schedule set forth in paragraph 2 following the Date of Termination as though the Participant continued to be employed through the two-year anniversary of the Participant’s Date of Termination and the Participant shall be treated as though he or she remained employed through the last day of the Service Period for purposes of paragraph 6, subject to the Participant not engaging in any Competitive Activity during such two-year period and subject to the Participant signing and not

revoking a general release and waiver of all claims against the Company and such release is effective no later than the sixty-day anniversary of the Date of Termination. If such release is not effective within such sixty-day period or in the event that the Participant engages in a Competitive Activity prior to the last day of the Restricted Period for any Installment, the Participant shall immediately forfeit any unvested Installments of Covered Performance Shares.

6.Transfer and Forfeiture of Shares. The transfer and forfeiture of shares shall be subject to the following:

(a) Except as provided in paragraphs 3, 4 and 5 above, the Participant will be vested in any Covered Performance Shares if the Date of Termination has not occurred prior to the later to occur of (i) the last day of the Restricted Period with respect to those shares and the requirements of paragraph 2 have been satisfied and (ii) the last day of the Service Period. Covered Performance Shares for which the Restricted Period has ended prior to the last day of the Service Period remain subject to the restrictions of this Agreement and may not be transferred by the Participant prior to the end of the Service Period as provided pursuant to this paragraph 6. Upon vesting at the end of the later to occur of (i) the last day of the Restricted Period with respect to those shares and the requirements of paragraph 2 have been satisfied and (ii) the last day of the Service Period, those shares will be delivered to the Participant free of all restrictions.

(b) Except as otherwise determined by the Committee and as provided in paragraphs 3, 4 and 5 above, the Participant shall forfeit any Covered Performance Shares as of the Date of Termination, if such Date of Termination occurs prior to the later to occur of (i) the last day of the Restricted Period with respect to those shares and (ii) the last day of the Service Period. Any Covered Performance Shares that have not vested as of the later to occur of (i) the last day of the Restricted Period with respect to those shares and (ii) the last day of the Service Period shall be forfeited by the Participant as of the such date.

(c) Notwithstanding anything to the contrary in any agreement between the Participant and the Company or a Subsidiary, the Participant acknowledges and agrees that the Covered Performance Shares and Premium Performance Shares shall vest (and the Restricted Period shall end) only as provided by, and subject to the terms of, this Performance Based Restricted Stock Award.

7.Premium Performance Shares. The vesting of the Premium Performance Shares under this paragraph 7 will be based on the Cumulative Performance of Chubb Limited during the Four-Year Performance Measurement Period and will be determined as follows:

(a) The Restricted Period shall end for the number of the Premium Performance Shares determined by multiplying the number of Covered Performance Shares that became vested pursuant to the terms of paragraph 2 by the Premium Award Performance Percentage (as determined below) further multiplied by the Premium Award Share Percentage (as determined below).

(b) The Premium Award Performance Percentage will be determined in accordance with the following schedule:

If the Cumulative Performance of Chubb Limited during the Four-Year Performance Measurement Period:	The Premium Award Performance Percentage will be:
Does not exceed the 50th percentile of the Cumulative Performance of the Peer Companies	0%
Exceeds the 50th percentile, but does not exceed the 65th percentile, of the Cumulative Performance of the Peer Companies	0%, as increased to the extent, if any, provided pursuant to the following provisions of this paragraph (b)
Exceeds the 65th percentile, but does not exceed the 75th percentile, of the Cumulative Performance of the Peer Companies	50%, as increased to the extent, if any, provided pursuant to the following provisions of this paragraph (b)
Exceeds the 75th percentile of the Cumulative Performance of the Peer Companies	100%
If the Cumulative Performance of Chubb Limited exceeds the 50th percentile but does not exceed the 65th percentile of the Cumulative Performance of the Peer Companies during the Four-Year Performance Measurement Period, then the Premium Award Performance Percentage will be a percentage between 0% and 50%, based on an interpolation of the Chubb Limited Cumulative Performance falling between the 50th percentile and 65th percentile of the Cumulative Performance of the Peer Companies during the Four-Year Performance Measurement Period. If the Cumulative Performance of Chubb Limited exceeds the 65th percentile but does not exceed the 75th percentile of the Cumulative Performance of the Peer Companies during the Four-Year Performance Measurement Period, then the Premium Award Performance Percentage will be a percentage between 50% and 100%, based on an interpolation of the Chubb Limited Cumulative Performance falling between the 65th percentile and 75th percentile of the Cumulative Performance of the Peer Companies during the Four-Year Performance Measurement Period.

(c) The Premium Award Share Price Percentage will be determined in accordance with the following schedule:

If the price of share of Stock of the Company as of the four year anniversary of the Grant Date:	The Premium Award Share Price Percentage will be:
Does not exceed $130	50%
Exceeds $130	100%

(d) Notwithstanding the foregoing provisions of this paragraph 7, the Participant shall vest in the number of Premium Performance Shares determined above on the later of the Cumulative Performance Certification Date or the four-year anniversary of the Grant Date, but only if the Committee certifies that the requisite Cumulative Performance has been achieved during the applicable Four-Year Performance Measurement Period on the Cumulative Performance Certification Date. Upon vesting at the end of such Restricted Period, those shares will be delivered to the Participant free of all restrictions. Except as provided in paragraph 3 for a Date of Termination that occurs because of Retirement, the Participant shall not be entitled to vesting of any Premium Performance Shares if the Date of Termination occurs before the later of the

Cumulative Performance Certification Date or the four-year anniversary of the Grant Date for any reason.

8.Withholding. All deliveries and distributions and the vesting of shares of stock under these Performance Based Restricted Stock Award Terms are subject to withholding of all applicable taxes (for the avoidance of doubt, such vesting and applicable withholding may occur prior to the last day of the Service Period if such shares of stock become vested for tax purposes as determined by the Company). At the election of the Participant, and subject to such rules and limitations as may be established by the Committee from time to time, such withholding obligations may be satisfied through the surrender of shares of Stock which the Participant already owns, or to which the Participant is otherwise entitled under the Plan; provided, however, that such shares may be used to satisfy not more than the Company’s minimum statutory withholding obligation (based on minimum statutory withholding rates for Federal and state tax purposes, including payroll taxes, that are applicable to such supplemental taxable income).

9.Transferability. Except as otherwise provided by the Committee, awards under these Performance Based Restricted Stock Award Terms may not be sold, assigned, transferred, pledged or otherwise encumbered prior to vesting and delivery.

10.Dividends. Dividends paid with respect to the Covered Performance Shares and the Premium Performance Shares with respect to record dates on or after the Grant Date for such shares but prior to the later to occur of the end of the Restricted Period for such shares and the last day of the Service Period shall be accumulated and distributed to the Participant on the date that the such shares are free of restrictions pursuant to paragraph 6; provided, however that no dividends or distributions shall be payable to or for the benefit of the Participant with respect to record dates for such dividends or distributions for any Covered Performance Shares or Premium Performance Shares occurring on or after the date, if any, on which the Participant has forfeited those shares. Notwithstanding the foregoing, if the right to the payment of dividends with respect to a Covered Performance Share or a Premium Performance Share would otherwise constitute nonqualified deferred compensation subject to Section 457A of the Internal Revenue Code (“Code Section 457A”), then, (i) any dividends accumulated in relation to Covered Performance Shares and Premium Performance Shares as of the date that the right to receive such payments is no longer treated as subject to a substantial risk of forfeiture for purposes of Code Section 457A (the “457A Vesting Date”) shall be used to purchase additional Covered Performance Shares and Premium Performance Shares subject to the same vesting provisions of the original Covered Performance Shares and Premium Performance Shares to which such accumulated dividends relate and any remaining unused cash amounts that are not sufficient to purchase an additional share shall be distributed to the Participant and (ii) any dividends that are paid on or after the 457A Vesting Date but prior to the vesting of the Covered Performance Shares and Premium Performance Shares shall be used to purchase additional Covered Performance Shares and Premium Performance Shares subject to the same vesting provisions of the original Covered Performance Shares and Premium Performance Shares to which such dividends relate and any remaining unused cash amounts that are not sufficient to purchase an additional share shall be distributed to the Participant.

11.Voting. The Participant shall not be prevented from voting the Covered Performance Shares merely because those shares are subject to the restrictions imposed by these Performance Based Restricted Stock Award Terms and the Plan; provided, however, that the Participant shall not be entitled to vote Covered Performance Shares with respect to record dates for any Covered Performance Shares occurring on or after the date, if any, on which the Participant has forfeited those shares. The Participant acknowledges and agrees that he or she shall not be entitled to vote any Premium Performance Shares if

the record date for entitlement to voting occurs prior to the date on which such shares become vested pursuant to paragraph 7.

12.Deposit of Performance Based Restricted Stock Award. Each certificate issued in respect of the Covered Performance Shares and Premium Performance Shares awarded under these Performance Based Restricted Stock Award Terms shall be registered in the name of the Participant and shall be deposited in a bank designated by the Committee.

13.Definitions. For purposes of these Performance Based Restricted Stock Award Terms, words and phrases shall be defined as follows:

(a) Cause. The term “Cause” shall mean - unless otherwise defined in an employment agreement between the Participant and the Company or Subsidiary - the occurrence of any of the following:

(i) a conviction of the Participant with respect to a (x) felony or (y) a misdemeanor involving moral turpitude; or

(ii) willful misconduct or gross negligence by the Participant resulting, in either case, in harm to the Company or any Subsidiary; or

(iii) failure by the Participant to carry out the lawful and reasonable directions of the Board or the Participant’s immediate supervisor, as the case may be; or

(iv) refusal to cooperate or non-cooperation by the Participant with any governmental regulatory authority; or

(v) fraud, embezzlement, theft or dishonesty by the Participant against the Company or any Subsidiary or a material violation by the Participant of a policy or procedure of the Company, resulting, in any case, in harm to the Company or any Subsidiary.

(b) Change in Control. The term “Change in Control” shall be defined as set forth in the Plan.

(c) Change in Control Date Termination. The term “Change in Control Date of Termination”means the Participant’s Date of Termination that occurs because the Company and/or any of the Related Companies terminates the Participant’s employment with the Company and/or the Related Companies without Cause (other than due to death, a Long-Term Disability or a Retirement) or because the Participant terminates his or her employment for Good Reason, provided that such termination in accordance with this paragraph 13(c) occurs during the period commencing on the 180th day immediately preceding a Change in Control date and ending on the two-year anniversary of such Change in Control date.

(d) Competitive Activity - The term “Competitive Activity” means the Participant’s: (i) engagement in an activity - whether as an employee, consultant, principal, member, agent, officer, director, partner or shareholder (except as a less than 1% shareholder of a publicly traded company) - that is competitive with any business of the Company or any Subsidiary conducted by the Company or such Subsidiary during the Participant’s employment with the Company or the two-year period following the Date of Termination; (ii) solicitation of any client and/or customer of the Company or any affiliate with respect to an activity prohibited by subparagraph (d)(i); (iii) solicitation or employment of any employee of the Company or any affiliate for the purpose of causing such employee to terminate his or her employment with the Company or such affiliate; or (iv) failure to keep confidential all Company trade secrets, proprietary and confidential information.

(e) Cumulative Performance. The term “Cumulative Performance” means, as to Chubb Limited or the Peer Companies, the growth in tangible book value per common shares outstanding as reported

under GAAP for Chubb Limited or the Peer Companies during the Four-Year Performance Measurement Period beginning on the Commencement Date and ending on the fourth anniversary of the Commencement Date. The determination of the Cumulative Performance and its parameters is subject to rules established by the Committee within 90 days of the beginning of the Four-Year Performance Measurement Period. The Committee, in its discretion, may adjust the reported tangible book value for Chubb Limited or the Peer Companies for any Four-Year Performance Measurement Period; provided, however, that no such adjustment may result in an increase in the number of Covered Performance Shares or Premium Performance Shares which vest (as described in paragraph 7) over the number of shares that would have otherwise vested had the reported tangible book value for either Chubb Limited or the Peer Companies not been adjusted.

(f) Date of Termination. A Participant’s “Date of Termination” means, with respect to an employee, the date on which the Participant’s employment with the Company and the Subsidiaries terminates for any reason, and with respect to a Director, the date immediately following the last day on which the Participant serves as a Director; provided that a Date of Termination shall not be deemed to occur by reason of a Participant’s transfer of employment between the Company and a Subsidiary or between two Subsidiaries; further provided that a Date of Termination shall not be deemed to occur by reason of a Participant’s cessation of service as a Director if immediately following such cessation of service the Participant becomes or continues to be employed by the Company or a Subsidiary, nor by reason of a Participant’s termination of employment with the Company or a Subsidiary if immediately following such termination of employment the Participant becomes or continues to be a Director; and further provided that a Participant’s employment shall not be considered terminated while the Participant is on a leave of absence from the Company or a Subsidiary approved by the Participant’s employer.

(g) Director. The term “Director” means a member of the Board, who may or may not be an employee of the Company or a Subsidiary.

(h) Forfeiture Payment. The term “Forfeiture Payment” means the pre-tax proceeds from sales or other transfers, if any, of the number of shares of Stock that became vested during the Restrictive Covenant Period pursuant to this Agreement and that the Participant has sold or otherwise transferred prior to the date of repayment required pursuant to subparagraph 21(b). For purposes of this definition, pre-tax proceeds for any shares of Stock that were transferred by the Participant in a transaction other than a sale on the New York Stock Exchange means the Fair Market Value of such shares on the New York Stock Exchange as of the date of such transaction.

(i) Forfeiture Shares.  The term “Forfeiture Shares” means the number of shares of Stock that became vested during the Restrictive Covenant Period pursuant to this Agreement and that remain held by the Participant as of the date of repayment required pursuant to subparagraph 21(b). It is the Participant’s responsibility to ensure that the shares of Stock delivered as Forfeiture Shares are the shares of Stock delivered previously pursuant to this Agreement. In the absence of Company records or written documentation from Participant’s broker demonstrating this fact, the Participant must deliver to the Company the Forfeiture Payment determined as of the date that such shares of Stock delivered pursuant to this Agreement are transferred from Participant’s stock account or otherwise become indistinguishable from other shares of Stock that the Participant may hold.

(j) Good Reason. The term “Good Reason”shall mean - unless otherwise defined in an in-force

employment agreement between the Participant and the Company or Subsidiary - the occurrence of any of the following within the 60-day period preceding a Date of Termination without the Participant’s prior written consent:

(i) a material adverse diminution of the Participant’s titles, authority, duties or responsibilities, or the assignment to the Participant of titles, authority, duties or responsibilities that are materially inconsistent with his or her titles, authority, duties and/or responsibilities in a manner materially adverse to the Participant; or

(ii) a reduction in the Participant’s base salary or annual bonus opportunity (other than any reduction applicable to all similarly situated Executives generally); or

(iii) a failure of the Company to obtain the assumption in writing of its obligations under the Plan by any successor to all or substantially all of the assets of the Company within 45 days after a merger, consolidation, sale or similar transaction that qualifies as a Change in Control.

(k) Long-Term Disability. A Participant shall be considered to have a “Long-Term Disability” if the Participant is determined to be eligible for long-term disability benefits under the long-term disability plan in which the Participant participates and which is sponsored by the Company or a Subsidiary; or if the Participant does not participate in a long-term disability plan sponsored by the Company or a Subsidiary, then the Participant shall be considered to have a “Long-Term Disability” if the Committee determines, under standards comparable to those of the Company’s long-term disability plan, that the Participant would be eligible for long-term disability benefits if he or she participated in such plan.

(l) Peer Companies. The term “Peer Companies” means the companies which are in the Chubb Financial Performance Peer Group as determined by the Committee within 90 days of the beginning of the applicable Performance Period and for which financial information is available for all year(s) in such Performance Measurement Period.

(m) Performance Goal. The term “Performance Goal” for any Primary Performance Measurement Period or Secondary Performance Measurement Period means the achievement by Chubb Limited of growth in tangible book value per common shares outstanding as reported under GAAP during such Performance Measurement Period, as compared to the growth in tangible book value per common shares outstanding as reported under GAAP during the same Performance Measurement Period by the Peer Companies. The determination of the Performance Goal and its parameters is subject to rules established by the Committee within 90 days of the beginning of the applicable Performance Measurement Period. The Committee, in its discretion, may adjust the reported tangible book value for Chubb Limited or the Peer Companies for any Primary Performance Measurement Period or Secondary Performance Measurement Period; provided, however, that no such adjustment may result in an increase in the number of Covered Performance Shares which are earned and vested at the end of any such Performance Measurement Period over the number of Covered Performance Shares that would have been earned and vested had the reported tangible book value for either Chubb Limited or the Peer Companies not been adjusted.

(n) Performance Measurement Period. The term “Performance Measurement Period” shall mean the Primary Performance Measurement Period or the Secondary Performance Measurement Period, as applicable, with respect to an Installment of Covered Performance Shares; and shall mean the Four-Year Performance Measurement Period with respect to the Covered Performance Shares as described in paragraph 2(e) and Premium Performance Shares as described in paragraph 7.

(o) Performance Percentage. The term “Performance Percentage” shall mean the applicable Performance Percentage determined based on the achievement of the Performance Goal over a Performance Measurement Period by Chubb Limited as compared to the Peer Companies:

If the Satisfaction of Chubb Limited of the Performance Goal during the applicable Performance Measurement Period:	The Performance Percentage will be:
Does not exceed the 25th percentile of the satisfaction of the Performance Goal of the Peer Companies	0%
Exceeds the 25th percentile, but does not exceed the 50th percentile, of the satisfaction of the Performance Goal of the Peer Companies	50%, as increased to the extent, if any, provided pursuant to the following provisions of this paragraph (o)
Exceeds the 50th percentile of the satisfaction of the Performance Goal of the Peer Companies	100%

If the performance of Chubb Limited exceeds the 25th percentile but does not exceed the 50th percentile of the satisfaction of the Performance Goal of the Peer Companies during the applicable Performance Period, then the Performance Percentage will be a percentage between 50% and 100%, based on an interpolation of the Chubb Limited performance falling between the 25th percentile and 50th percentile of the satisfaction of the Performance Goal of the Peer Companies during the applicable Performance Period.

(p) Qualifying Termination. The term “Qualifying Termination” means the Participant’s Date of Termination that occurs because the Company and/or any of the Related Companies terminates the Participant’s employment with the Company and/or the Related Companies without Cause. For the avoidance of doubt, the termination of the Participant’s employment due to death or Long-Term Disability, or a voluntary termination of the Participant’s employment by the Participant for any reason (including Good Reason or Retirement) shall not constitute a Qualifying Termination for the purposes of this Agreement.

(q) Restrictive Covenant Period. The term “Restrictive Covenant Period” means the twenty-four month period following a Date of Termination due to a Qualifying Termination or a Retirement.

(r) Retirement. The term “Retirement” means the Participant’s Date of Termination that occurs on or after the Participant has both completed at least ten years of service with the Company or a Subsidiary and attained at least age 62; provided, however, that a Date of Termination will not be treated as a Retirement unless the Participant (i) has terminated employment in good standing with the Company or a Subsidiary, and (ii) executes an agreement and release as required by the Company which will include, without limitation, a general release, and non-competition and non-solicitation provisions.  A Participant shall be deemed to have executed a release as described in clause (ii) above only if such release is returned by such time as is established by the Company; provided that to the extent benefits provided pursuant to the Plan would be considered to be provided under a nonqualified deferred compensation plan as that term is defined in Treas. Reg. §1.409A-1, such benefits shall be paid to the Participant only if the release is returned in time to permit the distribution of the benefits to satisfy the requirements of Section 409A of the Internal Revenue Code with respect to the time of payment.

14.Plan Definitions. Except where the context clearly implies or indicates the contrary, a word, term, or phrase used in the Plan is similarly used in these Performance Based Restricted Stock Award Terms.

15.Heirs and Successors. These Performance Based Restricted Stock Terms shall be binding upon, and inure to the benefit of, the Company and its successors and assigns, and upon any person acquiring, whether by merger, consolidation, purchase of assets or otherwise, all or substantially all of the Company’s assets and business. If any benefits deliverable to the Participant under these Performance Based Restricted Stock Terms have not been delivered at the time of the Participant’s death, such benefits shall be delivered to the Designated Beneficiary, in accordance with the provisions of these Performance Based Restricted Stock Terms and the Plan. The “Designated Beneficiary” shall be the beneficiary or beneficiaries designated by the Participant in a writing filed with the Committee in such form and at such time as the Committee shall require. If a deceased Participant fails to designate a beneficiary, or if the Designated Beneficiary does not survive the Participant, any rights that would have been exercisable by the Participant and any benefits distributable to the Participant shall be distributed to the legal representative of the estate of the Participant. If a deceased Participant designates a beneficiary and the Designated Beneficiary survives the Participant but dies before the complete distribution of benefits to the Designated Beneficiary under these Performance Based Restricted Stock Terms, then any benefits distributable to the Designated Beneficiary shall be distributed to the legal representative of the estate of the Designated Beneficiary.

16.Administration. The authority to manage and control the operation and administration of these Performance Based Restricted Stock Award Terms shall be vested in the Committee, and the Committee shall have all powers with respect to these Performance Based Restricted Stock Award Terms as it has with respect to the Plan. Any interpretation of these Performance Based Restricted Stock Award Terms by the Committee and any decision made by it with respect to these Performance Based Restricted Stock Award Terms are final and binding on all persons.

17.Plan and Corporate Records Govern. Notwithstanding anything in these Performance Based Restricted Stock Award Terms to the contrary, these Performance Based Restricted Stock Award Terms shall be subject to the terms of the Plan, a copy of which may be obtained by the Participant from the office of the Secretary of the Company; and these Performance Based Restricted Stock Award Terms are subject to all interpretations, amendments, rules and regulations promulgated by the Committee from time to time pursuant to the Plan. Notwithstanding anything in the Performance Based Restricted Stock Terms to the contrary, in the event of any discrepancies between the corporate records regarding this award and the Record-Keeping System, the corporate records shall control.

18.Not An Employment Contract. The Performance Based Restricted Stock Award will not confer on the Participant any right with respect to continuance of employment or other service with the Company or any Subsidiary, nor will it interfere in any way with any right the Company or any Subsidiary would otherwise have to terminate or modify the terms of such Participant’s employment or other service at any time.

19.Notices. Any written notices provided for in these Performance Based Restricted Stock Award Terms or the Plan shall be in writing and shall be deemed sufficiently given if either hand delivered or if sent by fax or overnight courier, or by postage paid first class mail. Notices sent by mail shall be deemed received three business days after mailing but in no event later than the date of actual receipt. Notices shall be directed, if to the Participant, at the Participant’s address indicated by the Company’s records, or if to the Company, at the Company’s principal executive office.

20.Fractional Shares. In lieu of issuing a fraction of a share, resulting from an adjustment of the Performance Based Restricted Stock Award pursuant to paragraph 5.2(f) of the Plan or otherwise, the Company will be entitled to pay to the Participant an amount equal to the fair market value of such fractional share.

21.Competitive Activity.

(a)The Committee may cancel, rescind, suspend, withhold or otherwise limit or restrict the Performance Based Restricted Stock Award at any time if the Participant engages in any "Competitive Activity".

(b)Immediately prior to the vesting of the shares of Stock pursuant to this Agreement, the Participant shall certify, to the extent required by the Committee, in a manner acceptable to the Committee, that the Participant is not engaging and has not engaged in any Competitive Activity. In the event a Participant has engaged in any Competitive Activity during the Restrictive Covenant Period, then the Participant shall be required to transfer the Forfeiture Shares to the Company and, if applicable, pay the Forfeiture Payment to the Company, in such manner and on such terms and conditions as may be required by the Committee, and the Company shall be entitled to set-off such amounts against any amount owed to the Participant by the Company and/or Subsidiary.

22.Amendment. These Performance Based Restricted Stock Award Terms may be amended in accordance with the provisions of the Plan, and may otherwise be amended by written agreement of the Participant and the Company without the consent of any other person.

IN WITNESS WHEREOF, the Company has caused these presents to be executed in its name and on its behalf, all as of the Grant Date.

CHUBB LIMITED

By:

Its:

I hereby agree to all the terms, restrictions and conditions set forth in the Agreement:

Participant

EX-12.1

Exhibit 12.1

Chubb Limited

Ratio of Earnings to Fixed Charges

	Years Ended December 31
(in millions of U.S. dollars, except ratios)	2015		2014		2013		2012		2011
Net income	$	2,834	$	2,853	$	3,758	$	2,706	$	1,540
Add:
Provision for income taxes	462		634		480		270		502
Fixed charges	342		322		318		287		288
Earnings for computation	$	3,638	$	3,809	$	4,556	$	3,263	$	2,330
Fixed charges
Interest expense	$	300	$	280	$	275	$	250	$	250
Portion of rental expense deemed to be interest	42		42		43		37		38
Total fixed charges	$	342	$	322	$	318	$	287	$	288
Ratio of earnings to fixed charges	10.6		11.8		14.4		11.4		8.1

Note: Chubb Limited recognizes accruals for interest and penalties, if any, related to unrecognized tax benefits in income tax expense (i.e., excluded from interest expense).

EX-21.1

 Exhibit 21.1 Set forth below are subsidiaries of Chubb and their respective jurisdiction of ownership and percentage ownership, in each case as of December 31, 2015. Any legal entity name changes occurring subsequent to December 31, 2015 through the date of this filing have been reflected below. Each of the named subsidiaries is not necessarily a significant subsidiary as defined in Rule 1-02(w) of Regulation S-X, and Chubb has several additional subsidiaries not named below. The unnamed subsidiaries, considered in the aggregate as a single subsidiary, would not constitute a significant subsidiary at the end of the year covered by this report.

Name	Jurisdiction of Organization	Percentage Ownership
Chubb Limited	Switzerland	Publicly held
ACE Insurance (Switzerland) Limited	Switzerland	100%
ACE Reinsurance (Switzerland) Limited	Switzerland	100%
ACE Group Management and Holdings Ltd.	Bermuda	100%
ACE Bermuda Insurance Ltd.	Bermuda	100%
Paget Reinsurance Ltd.	Bermuda	100%
ACE Capital Title Reinsurance Company	USA (New York)	100%
ACE Financial Solutions International, Ltd.	Bermuda	100%
ACE Bermuda International Insurance (Ireland) Limited (formerly ACE European Markets Insurance Limited)	Ireland	100%
Corporate Officers & Directors Assurance Ltd.	Bermuda	100%
Oasis Real Estate Company Ltd.	Bermuda	100%
Sovereign Risk Insurance Limited	Bermuda	100%
Sovereign Risk Insurance (Dubai) Limited	UAE (Dubai)	100%
ACE Realty Holdings Limited	Bermuda	100%
ACE Global Markets Limited	England & Wales	100%
ACE Group Holdings Limited	England & Wales	100%
ACE Tarquin	England & Wales	100%
ACE Capital V Limited	England & Wales	100%
ACE Leadenhall Limited	England & Wales	100%
ACE Underwriting Agencies Limited	England & Wales	100%
ACE London Group Limited	England & Wales	100%
ACE Capital Limited	England & Wales	100%
ACE Capital III Limited	England & Wales	100%
ACE Capital IV Limited	England & Wales	100%
ACE London Holdings Limited	England & Wales	100%
ACE Capital II Limited	England & Wales	100%
ACE London Investments Limited	England & Wales	100%
ACE London Aviation Limited	England & Wales	100%
ACE London Underwriting Limited	England & Wales	100%
ACE Underwriting Services Limited	England & Wales	100%
ACE London Services Limited	England & Wales	100%
ACE Capital VI Limited	England & Wales	100%
ACE Intermediaries	Bermuda	100%
ACE Services Limited	Cayman Islands	100%
Oasis Insurance Services Ltd.	Bermuda	100%
ACE Tempest Life Reinsurance Ltd.	Bermuda	100%
ACE Europe Life Limited	England & Wales	100%
ACE Tempest Reinsurance Ltd.	Bermuda	100%
ACE Tempest Re Escritório de Representação no Brasil Ltda.	Brazil	100%

ABR Reinsurance Capital Holdings Ltd.	Bermuda	11.26%
Oasis Investments Limited	Bermuda	67% 33% (ACE Bermuda Insurance Ltd.)
Oasis Investments 2 Ltd.	Bermuda	67% 33% (ACE Bermuda Insurance Ltd.)
ACE Group Holdings, Inc.	USA (Delaware)	100%
ACE (CR) Holdings	England & Wales	100%
ACE Capital VII Limited	England & Wales	100%
ACE (RGB) Holdings Limited	England & Wales	100%
ACE (CIDR) Limited	England & Wales	100%
Ridge Underwriting Agencies Limited	England & Wales	100%
ACE Asset Management Inc.	USA (Delaware)	100%
ACE Life Insurance Company	USA (Connecticut)	100%
ACE INA Holdings Inc.	USA (Delaware)	80% 20% (ACE Limited)
ACE Direct Marketing Company, Ltd.	Korea	100%
ACE Life Insurance Company Ltd.	Korea	100%
Combined Insurance Company of America	USA (Illinois)	100%
Combined Insurance Company of Europe Limited	Ireland	100%
Combined Life Insurance Company of New York	USA (New York)	100%
CoverHound, Inc.	USA (Delaware)	24.5%
Huatai Insurance Group Company, Limited	China	5.8293% 9.7755% (ACE Tempest Reinsurance Ltd.) 4.3952% (ACE US Holdings, Inc.)
Huatai Life Insurance Company, Limited	China	79.5746% 20% (ACE INA Holdings Inc.)
INA Corporation	USA (Pennsylvania)	100%
INA Tax Benefits Reporting, Inc.	USA (Delaware)	100%
INA Financial Corporation	USA (Delaware)	100%
Brandywine Holdings Corporation	USA (Delaware)	100%
Cravens, Dargan & Company, Pacific Coast	USA (Delaware)	100%
Century Indemnity Company	USA (Pennsylvania)	100%
Century International Reinsurance Company Ltd.	Bermuda	100%
INA Holdings Corporation	USA (Delaware)	100%
INA International Holdings, LLC	USA (Delaware)	100%
ACE INA Properties, Inc.	USA (Delaware)	100%
Conference Facilities, Inc.	USA (Pennsylvania)	100%
ACE INA Financial Institution Solutions, Inc.	USA (Delaware)	100%
American Lenders Facilities, Inc.	USA (California)	100%
ESIS, Inc.	USA (Pennsylvania)	100%

ESIS Canada Inc.	Canada (Ontario)	100%
ACE Environmental Health and Safety Consulting (Shanghai) Company Limited	China	100%
ESIS Asia Pacific PTE. Ltd.	Singapore	100%
ESIS Academy PTE. Ltd.	Singapore	100%
Proclaim America, Inc.	USA (Texas)	51%
NewMarkets Insurance Agency, Inc.	USA (Delaware)	100%
ACE INA Excess and Surplus Insurance Services, Inc.	USA (Pennsylvania)	100%
ACE INA Excess and Surplus Insurance Services, Inc.	USA (California)	100%
ACE Financial Solutions, Inc.	USA (Delaware)	100%
ACE Risk Solutions, Inc.	USA (New York)	100%
Indemnity Insurance Company of North America	USA (Pennsylvania)	100%
ACE American Insurance Company	USA (Pennsylvania)	100%
Penn Millers Holding Corporation	USA (Pennsylvania)	100%
PMMHC Corp.	USA (Pennsylvania)	100%
Penn Millers Insurance Company	USA (Pennsylvania)	100%
Penn Millers Agency, Inc.	USA (Pennsylvania)	100%
Pacific Employers Insurance Company	USA (Pennsylvania)	100%
Illinois Union Insurance Company	USA (Illinois)	100%
Rain and Hail Insurance Service Incorporated	USA (Iowa)	100%
Agri General Insurance Company	USA (Iowa)	100%
Rain and Hail L.L.C.	USA (Iowa)	100%
Agri General Insurance Service, Inc.	USA (Iowa)	100%
Rain and Hail Insurance Service International, Inc.	USA (Iowa)	100%
Rain and Hail Insurance Service, Ltd.	Canada	100%
Rain and Hail Insurance Service de Mexico, S.A. de C.V.	Mexico	100%
Rain and Hail Financial, Inc.	USA (Iowa)	100%
INAMAR Insurance Underwriting Agency, Inc.	USA (New Jersey)	100%
INAMAR Insurance Underwriting Agency, Inc. of                                                                  Texas	USA (Texas)	100%
Insurance Company of North America	USA (Pennsylvania)	100%
Bankers Standard Insurance Company	USA (Pennsylvania)	100%
Bankers Standard Fire and Marine Company	USA (Pennsylvania)	100%
ACE Property and Casualty Insurance Company	USA (Pennsylvania)	100%
ACE Fire Underwriters Insurance Company	USA (Pennsylvania)	100%
Atlantic Employers Insurance Company	USA (New Jersey)	100%
ACE Insurance Company of the Midwest	USA (Indiana)	100%

ACE Tempest Re USA, LLC	USA (Connecticut)	100%
ACE Structured Products, Inc.	USA (Delaware)	100%
Recovery Services International, Inc.	USA (Delaware)	100%
ACE INA International Holdings, Ltd.	USA (Delaware)	100%
Combined Life Insurance Company of Australia, Ltd.	Australia	100%
ACE Arabia Cooperative Insurance Company	Saudi Arabia	30%
ACE Servicios, S.A.	Panama	100%
ACE Life Insurance Company Ltd.	Bermuda	100%
ACE Jerneh Insurance Berhad	Malaysia	100%
FM HoldCo LLC	USA (Delaware)	100%
ACE Fianzas Monterrey, S.A.	Mexico	99.95% .05% (AFIA Finance Corporation)
Operadora FMA, S.A. de C.V.	Mexico	100%
INACOMB S.A. de C.V.	Mexico	100%
ACE Australia Holdings Pty Limited	Australia	100%
ACE Insurance Limited	Australia	100%
PT. ACE Life Assurance	Indonesia	98.21%
ACE Life Insurance Company Limited	Vietnam	100%
ACE Life Fund Management Company Limited	Vietnam	100%
ACE Insurance Company Limited	Vietnam	100%
ACE Seguradora S.A.	Brazil	99.99% 0.01% (ACE Brazil Holdings, Ltd.)
ACE Seguros Solucoes Corporativas S.A.	Brazil	100%
ACE Serviçios para Seguradoras e Resseguradoras Ltda	Chile	99% 1% (AFIA Finance Corporation)
Servicios ACEINA, S.A. de C.V.	Mexico	99.9% .1% (AFIA Finance Corporation)
ACE Seguros S.A.	Argentina	96.8621% 3.12% (AFIA Finance Corporation)
ACE INA International Holdings Ltd. Agencia Chile	Chile	100%
ACE Seguros de Vida S.A.	Chile	97.9% 2.1% (AFIA Finance Corporation Agencia en Chile)
Ventas Personales Limitada	Chile	99% 1% (AFIA Finance Corporation Agencia en Chile)

ACE Seguros S.A.	Chile	93.33% 3.77% (AFIA Finance Corporation, Agencia en Chile) 2.8% (AFIA Finance Corp. Chile Limitada)
ACE Servicios Regionales Limitada	Chile	99% 1% (AFIA Finance Corporation Agencia en Chile)
PT ACE Jaya Proteksi	Indonesia	83% 17% (PT Adi Citra Mandiri)
PT Jaya Proteksi Takaful	Indonesia	51%
PT Jaya Prima Auto Center	Indonesia	75%
ACE INA Overseas Holdings, Inc.	USA (Delaware)	100%
ACE European Holdings Limited	England & Wales	100%
ACE Insurance Management (DIFC) Limited	Dubai International Financial Centre	100%
ACE European Holdings No 2 Limited	England & Wales	100%
ACE Insurance S.A.-N.V.	Belgium	99.94923% 0.05076% (ACE INA International Holdings, Ltd.)
ACE European Group Limited	England & Wales	69.1277% 30.8723% (ACE European Holdings Ltd.)
ACE Pension Trustee Limited	England & Wales	100%
ACE Russia Investments Limited	England & Wales	100%
LLC ACE Life Insurance	Russia	100%
LLC ACE Insurance Company	Russia	100%
ACE Seguradora S.A.	Macau	99.9897%
ACE Holdings Limited	Cayman Islands	100%
ACE Insurance Company Egypt S.A.E.	Egypt	98.014% 0.551% (ACE INA Services UK Ltd) 0.551% (ACE European Holdings Ltd)
ACE Life Insurance Company S.A.E.	Egypt	98.35% 0.98% (ACE Holdings Limited) 0.67% (AFIA Finance Corporation)
ACE INA Berhad	Malaysia	100%

ACE Seguros S.A.	Colombia	35.801859% 46.682606% (Insurance Company of North America) 7.84194% (INA Financial Corporation) 5.752174% (AFIA Finance Corporation) 3.921353% (Century International Reinsurance Company, Ltd)
ACE Seguros S.A.	Ecuador	100%
ACE Seguros S.A.	Mexico	100%
ACE Seguros S.A.	Panama	100%
ACE Seguros S.A. (formerly Altas Cumbres Compañía de Seguros de Vida )	Peru	100%
Eksupsiri Company Limited	Thailand	49% 50.99% (Nam Ek)
ACE Life Assurance Public Co. Ltd.	Thailand	75.01% 24.99% (Oriental Equity Holdings)
Samaggi Insurance PCL	Thailand	94.12%
Nam Ek Company Limited	Thailand	49%
Eksupsiri Company Limited	Thailand	50.99% 49% (AIIH)
Siam Marketing & Analytics Company Limited	Thailand	50.99% 49% (ACE Asia Pacific Services Pte. Limited)
Siam Liberty Insurance Broker Co., Ltd.	Thailand	74.8% 24.99% (AFIA Finance Corporation)
ACE Insurance Limited	South Africa	100%
ACE Insurance Limited	New Zealand	100%
ACE Brazil Holdings, Ltd.	Delaware	100%
ACE Corretora de Seguros Ltda.	Brazil	99% 1% (ACE INA International Holdings, Ltd.)
ACE Resseguradora S.A.	Brazil	99.99% 0.01% (ACE INA International Holdings, Ltd.)
ACE International Management Corporation	Pennsylvania	100%
Cover Direct, Inc.	USA (Delaware)	100%
PT Adi Citra Mandiri	Indonesia	100%
ACE INA G.B. Holdings, Ltd	USA (Delaware)	100%
ACE INA Services U.K. Limited	United Kingdom	100%
Century Inversiones, S.A.	Panama	100%
ACE Arabia Insurance Company Limited B.S.C. (C)	Bahrain	50%
ACE Insurance Limited	Pakistan	100%

ACE INA Overseas Insurance Company Ltd.	Bermuda	100%
ACE Canada Holdings, Inc.	USA (Delaware)	100%
INACAN Holdings Ltd.	Canada (Ontario)	100%
ACE INA Insurance	Canada	100%
ACE INA Life Insurance	Canada	100%
ACE Tempest Re Canada Inc.	Canada (Quebec)	100%
ACE Insurance Limited	Singapore	100%
ACE Insurance	Japan	100%
ACE Chintai SSI	Japan	100%
H.S. Life Small Amount & Short Term Ins. Co. Ltd.	Japan	14.9%
ACE Marketing Group, C.A.	Venezuela	100%
ACE Insurance Company	Puerto Rico	100%
ACE Insurance Agency, Inc.	Puerto Rico	100%
ACE Insurance Limited	Hong Kong	100%
ACE Alternative Risk Ltd. (formerly ACE Risk Management International Ltd.)	Bermuda	100%
DELPANAMA S.A.	Panama	100%
INAMEX S.A.	Mexico	100%
Oriental Equity Holdings Limited	British Virgin Islands	100%
AFIA Finance Corporation	USA (Delaware)	100%
AFIA Finance Corporation Agencia en Chile	Chile	100%
AFIA Venezolana C.A.	Venezuela	100%
ACE Servicios S.A.	Argentina	95% 5% (ACE INA Int'l Holdings)
AFIA Finance Corp. Chile Limitada	Chile	98% 2% (ACE INA Int'l Holdings)
Pembroke Reinsurance, Inc.	USA (Delaware)	100%
RIYAD Insurance Co. Ltd.	Bermuda	80%
ACE Asia Pacific Services Pte. Ltd.  (formerly Safire Private Limited)	Singapore	100%
ACE Asia Pacific Services Sdn Bhd	Malaysia	100%
AFIA (INA) Corporation, Limited	USA (Delaware)	100%
AFIA	Unincorporated Association	60% 40% AFIA (ACE)
AFIA (ACE) Corporation, Limited	USA (Delaware)	100%
INAVEN, C.A. “Venezuela”	Venezuela	100%
Ally Insurance Holdings LLC	USA (Delaware)	100%
ABA Seguros, S.A. de C.V.	Mexico	100%
ABA Servicios Corporativos, S.A. de C.V.	Mexico	100%
ABA Mexico Holdings LLC	USA (Delaware)	100%
ABA Garantias S.A. de C.V.	Mexico	100%
William Investment Holdings Corporation	USA (New Jersey)	100%
ACE US Holdings, Inc.	USA (Delaware)	100%
Rhea International Marketing (L), Inc.	Malaysia	60%
Westchester Fire Insurance Company (F/K/A ACE Indemnity Insurance Company)	USA (Pennsylvania)	100%
Westchester Surplus Lines Insurance Company	USA (Georgia)	100%
Westchester Specialty Insurance Services, Inc.	USA (Nevada)	100%

EX-23.1

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (Nos. 333-200838 and 333-207570) and Form S-8 (Nos. 333-208998, 333-188949, 333-182062, 333-153239, 333-116532, 333-1404, 333-46301, 333-93867, 333-72301, 333-61038, 333-134504, and 333-168795) of Chubb Limited of our report dated February 26, 2016 relating to the financial statements, financial statement schedules, and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.

/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP

Philadelphia, Pennsylvania

February 26, 2016

EX-31.1

Exhibit 31.1

CERTIFICATION PURSUANT TO

SECTION 302 OF

THE SARBANES-OXLEY ACT OF 2002

I, Evan G. Greenberg, certify that:

1) I have reviewed this annual report on Form 10-K of Chubb Limited;

2) Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3) Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4) The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5) The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s Board of Directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: February 26, 2016

/s/ Evan G. Greenberg

Evan G. Greenberg

Chairman, President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION PURSUANT TO

SECTION 302 OF

THE SARBANES-OXLEY ACT OF 2002

I, Philip V. Bancroft, certify that:

1) I have reviewed this annual report on Form 10-K of Chubb Limited;

2) Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3) Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4) The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5) The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s Board of Directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: February 26, 2016

/s/ Philip V. Bancroft

Philip V. Bancroft

Executive Vice President and Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned officer of Chubb Limited (the Corporation) hereby certifies that the Corporation’s Annual Report on Form 10-K for the year ended December 31, 2015, fully complies with the applicable reporting requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m(a)) and that the information contained in the Form 10-K fairly presents, in all material respects, the financial condition and results of operations of the Corporation.

Dated: February 26, 2016	/s/ Evan G. Greenberg
	Evan G. Greenberg Chairman, President and Chief Executive Officer

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned officer of Chubb Limited (the Corporation) hereby certifies that the Corporation’s Annual Report on Form 10-K for the year ended December 31, 2015, fully complies with the applicable reporting requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m(a)) and that the information contained in the Form 10-K fairly presents, in all material respects, the financial condition and results of operations of the Corporation.

Dated: February 26, 2016	/s/ Philip V. Bancroft
	Philip V. Bancroft
	Executive Vice President and Chief Financial Officer

XML

Document and Entity Information - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2015	Feb. 12, 2016	Jun. 30, 2015
Document Documentand Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	FY
Trading Symbol	CB
Entity Registrant Name	Chubb Ltd
Entity Central Index Key	0000896159
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		461,670,290
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 35

XML

Consolidated Balance Sheets - USD ($) $ in Millions		Dec. 31, 2015		Dec. 31, 2014
Assets
Fixed maturities available for sale, at fair value (amortized cost - $43,149 and $47,826) (includes hybrid financial instruments of $31 and $274)		$ 43,587		$ 49,395
Fixed maturities held to maturity, at amortized cost (fair value – $8,552 and $7,589)		8,430		7,331
Equity securities, at fair value (cost – $441 and $440)		497		510
Short-term investments, at fair value and amortized cost		10,446		2,322
Other investments (cost – $2,993 and $2,999)		3,291		3,346
Total investments		66,251		62,904
Cash	[1]	1,775	[2]	655	[3],[4]
Securities lending collateral		1,046		1,330
Accrued investment income		513		552
Insurance and reinsurance balances receivable		5,323		5,426
Reinsurance recoverable on losses and loss expenses		11,386		11,992
Reinsurance recoverable on policy benefits		187		217
Deferred policy acquisition costs		2,873		2,601
Value of business acquired		395		466
Goodwill and other intangible assets		5,683		5,724
Prepaid reinsurance premiums		2,082		2,026
Deferred tax assets		318		295
Investments in partially-owned insurance companies		653		504
Other assets		3,881		3,556
Total assets		102,366		98,248
Liabilities
Unpaid losses and loss expenses		37,303		38,315
Unearned premiums		8,439		8,222
Future policy benefits		4,807		4,754
Insurance and reinsurance balances payable		4,270		4,095
Securities lending payable		1,047		1,331
Accounts payable, accrued expenses, and other liabilities		6,205		5,726
Short-term debt				1,150
Repurchase agreements		1,404		1,402
Long-term debt		9,447		3,357
Trust preferred securities		309		309
Total liabilities		$ 73,231		$ 68,661
Commitments and contingencies
Shareholders' equity
Common Shares (CHF 24.15 and CHF 24.77 par value; 342,832,412 shares issued; 324,563,441 and 328,659,686 shares outstanding)		$ 7,833		$ 8,055
Common Shares in treasury (18,268,971 and 14,172,726 shares)		(1,922)		(1,448)
Additional paid-in capital		4,481		5,145
Retained earnings		19,478		16,644
Accumulated other comprehensive income (AOCI)		(735)		1,191
Total shareholders’ equity		29,135		29,587
Total liabilities and shareholders’ equity		$ 102,366		$ 98,248

[1] Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2015 and 2014, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[2] Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2015, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[3] Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2014 and 2013, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[4] Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2014, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

XML

Consolidated Balance Sheets (Parenthetical) $ in Millions	Dec. 31, 2015 USD ($) shares	Dec. 31, 2014 USD ($) shares
Statement of Financial Position [Abstract]
Fixed maturities available for sale, at amortized cost	$ 43,149	$ 47,826
Fixed maturities available for sale, hybrid financial instruments	31	274
Held-to-maturity Securities, Fair Value	8,552	7,589
Equity securities, at cost	441	440
Other investments, cost	$ 2,993	$ 2,999
Common Shares, shares issued | shares	342,832,412	342,832,412
Common Shares, shares outstanding | shares	324,563,441	328,659,686
Common Shares in treasury, shares | shares	18,268,971	14,172,726

XML

Consolidated Statements Of Operations and Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues
Net premiums written	$ 17,713	$ 17,799	$ 17,025
Increase in unearned premiums	(500)	(373)	(412)
Net premiums earned	17,213	17,426	16,613
Net investment income	2,194	2,252	2,144
Net realized gains (losses):
Other-than-temporary impairment (OTTI) losses gross	(151)	(75)	(22)
Portion of OTTI losses recognized in other comprehensive income (OCI)	(39)	(7)
Net OTTI losses recognized in income	(112)	(68)	(22)
Net realized gains (losses) excluding OTTI losses	(308)	(439)	526
Total net realized gains (losses)	(420)	(507)	504
Total revenues	18,987	19,171	19,261
Expenses
Losses and loss expenses	9,484	9,649	9,348
Policy benefits	543	517	515
Policy acquisition costs	2,941	3,075	2,659
Administrative expenses	2,270	2,245	2,211
Interest expense	300	280	275
Other (income) expense	(51)	(190)	(80)
Amortization of Intangible Assets	171	108	95
Chubb integration expenses	33	0	0
Total expenses	15,691	15,684	15,023
Income before income tax	3,296	3,487	4,238
Income tax expense	462	634	480
Net income	2,834	2,853	3,758
Other comprehensive income (loss)
Unrealized appreciation (depreciation)	(1,280)	820	(1,762)
Reclassification adjustment for net realized (gains) losses included in net income	151	24	(105)
Other comprehensive income (loss)after reclassification for net realized gains included in net income	(1,129)	844	(1,867)
Change in:
Cumulative translation adjustment	(958)	(632)	(339)
Pension liability	15	2
Other comprehensive income (loss), before income tax	(2,072)	214	(2,206)
Income tax benefit (expense) related to OCI items	146	(175)	471
Other comprehensive income (loss)	(1,926)	39	(1,735)
Comprehensive income	$ 908	$ 2,892	$ 2,023
Earnings per share
Basic earnings per share	$ 8.71	$ 8.50	$ 11.02
Diluted earnings per share	$ 8.62	$ 8.42	$ 10.92

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Consolidated Statements of Operations and Comprehensive Income (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income tax expense (benefit)	$ 462	$ 634	$ 480
Net realized gains (losses)	(420)	(507)	504
Reclassification out of Accumulated Other Comprehensive Income [Member] | Net unrealized appreciation on investments
Income tax expense (benefit)	(2)	9	17
Net realized gains (losses)	$ (151)	$ (24)	$ 105

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Consolidated Statements Of Shareholders' Equity - USD ($) $ in Millions	Total	Common Shares	Common Shares in Treasury	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income	Net unrealized appreciation on investments	Cumulative Translation Adjustment	Accumulated Defined Benefit Plans Adjustment [Member]
Balance – beginning of year at Dec. 31, 2012		$ 9,591	$ (159)	$ 5,179	$ 10,033		$ 2,633	$ 339	$ (85)
Net shares redeemed under employee share-based compensation plans				(126)
Exercise of stock options				(42)
Dividends declared on Common Shares – par value reduction		(692)
Common Shares repurchased			(290)
Net shares redeemed under employee share-based compensation plans			194
Share-based compensation expense and other				191
Tax benefit on share-based compensation expense				36
Net income	$ 3,758				3,758
Funding of dividends declared from Additional paid-in capital				0
Change in year, before reclassification from AOCI, net of income tax benefit (expense) of $154, $(176) and $391							(1,371)
Amounts reclassified from AOCI, net of income tax benefit (expense) of $(2), $9 and $17							(88)
Change in year, net of income tax benefit (expense) of $152, $(167), and $408							(1,459)
Change in year, net of income tax benefit (expense) of nil, $(12), and $63								(276)
Change in year, net of income tax benefit (expense) of $(6), $4, and nil									0
Balance - end of year at Dec. 31, 2013	28,825	8,899	(255)	5,238	13,791	$ 1,152	1,174	63	(85)
Net shares redeemed under employee share-based compensation plans				(167)
Exercise of stock options				(58)
Dividends declared on Common Shares – par value reduction		(844)
Common Shares repurchased			(1,449)
Net shares redeemed under employee share-based compensation plans			256
Share-based compensation expense and other				185
Tax benefit on share-based compensation expense				28
Net income	2,853				2,853
Funding of dividends declared from Additional paid-in capital				(81)	81
Dividends declared on Common Shares					(81)
Change in year, before reclassification from AOCI, net of income tax benefit (expense) of $154, $(176) and $391							644
Amounts reclassified from AOCI, net of income tax benefit (expense) of $(2), $9 and $17							33
Change in year, net of income tax benefit (expense) of $152, $(167), and $408							677
Change in year, net of income tax benefit (expense) of nil, $(12), and $63								(644)
Change in year, net of income tax benefit (expense) of $(6), $4, and nil									6
Balance - end of year at Dec. 31, 2014	29,587	8,055	(1,448)	5,145	16,644	1,191	1,851	(581)	(79)
Net shares redeemed under employee share-based compensation plans				(160)
Exercise of stock options				(61)
Dividends declared on Common Shares – par value reduction		(222)
Common Shares repurchased			(734)
Net shares redeemed under employee share-based compensation plans			260
Share-based compensation expense and other				184
Tax benefit on share-based compensation expense				26
Net income	2,834				2,834
Funding of dividends declared from Additional paid-in capital				(653)	653
Dividends declared on Common Shares					(653)
Change in year, before reclassification from AOCI, net of income tax benefit (expense) of $154, $(176) and $391							(1,126)
Amounts reclassified from AOCI, net of income tax benefit (expense) of $(2), $9 and $17							149
Change in year, net of income tax benefit (expense) of $152, $(167), and $408							(977)
Change in year, net of income tax benefit (expense) of nil, $(12), and $63								(958)
Change in year, net of income tax benefit (expense) of $(6), $4, and nil									9
Balance - end of year at Dec. 31, 2015	$ 29,135	$ 7,833	$ (1,922)	$ 4,481	$ 19,478	$ (735)	$ 874	$ (1,539)	$ (70)

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Consolidated Statements Of Shareholders' Equity (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net unrealized appreciation on investments, Change in year, income tax (expense) benefit	$ 152	$ (167)	$ 408
Cumulative translation adjustment, Change in year, income tax(expense) benefit	0	(12)	63
Pension liability adjustment, Change in year, income tax (expense) benefit	(6)	4	0
Net unrealized appreciation on investments
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	149	33	(88)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Net unrealized appreciation on investments
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	154	(176)	(391)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Tax	$ (2)	$ 9	$ 17

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Consolidated Statements Of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Cash flows from operating activities
Net income	$ 2,834		$ 2,853		$ 3,758
Adjustments to reconcile net income to net cash flows from operating activities
Net realized (gains) losses	420		507		(504)
Amortization of premiums/discounts on fixed maturities	158		188		268
Deferred income taxes	113		145		240
Unpaid losses and loss expenses	(375)		317		(365)
Unearned premiums	335		441		402
Future policy benefits	216		236		191
Insurance and reinsurance balances payable	268		376		176
Accounts payable, accrued expenses, and other liabilities	179		13		37
Income taxes payable	(148)		103		(45)
Insurance and reinsurance balances receivable	(53)		(469)		(624)
Reinsurance recoverable on losses and loss expenses	218		119		787
Reinsurance recoverable on policy benefits	33		4		23
Deferred policy acquisition costs	(435)		(397)		(503)
Prepaid reinsurance premiums	(212)		(89)		(31)
Other	313		149		212
Net cash flows from operating activities	3,864		4,496		4,022
Cash flows from investing activities
Purchases of fixed maturities available for sale	(16,040)		(15,553)		(21,340)
Purchases of to be announced mortgage-backed securities	(31)				(58)
Purchases of fixed maturities held to maturity	(62)		(267)		(447)
Purchases of equity securities	(158)		(251)		(264)
Sales of fixed maturities available for sale	10,783		7,482		10,355
Sales of to be announced mortgage-backed securities	31				58
Sales of equity securities	183		670		142
Maturities and redemptions of fixed maturities available for sale	6,567		6,413		6,941
Maturities and redemptions of fixed maturities held to maturity	669		875		1,488
Net change in short-term investments	(8,216)		(603)		524
Net derivative instruments settlements	(21)		(230)		(471)
Acquisition of subsidiaries (net of cash acquired of $20, $38, and $8)	264		(766)		(977)
Other	(263)		(274)		(393)
Net cash flows used for investing activities	(6,294)		(2,504)		(4,442)
Cash flows from financing activities
Dividends paid on Common Shares	(862)		(862)		(517)
Common Shares repurchased	(758)		(1,429)		(287)
Proceeds from issuance of long-term debt	6,090		699		947
Proceeds from issuance of repurchase agreements	2,029		1,978		2,572
Repayment of repurchase agreements	(2,027)		(1,977)		(2,572)
Repayments of Long-term Debt	(1,150)		(501)
Proceeds from share-based compensation plans, including windfall tax benefits	131		127		135
Additions to Contract Holders Funds	503		366		233
Withdrawal from Contract Holders Funds	(221)		(172)		(120)
Other	(40)		(6)		0
Net cash flows (used for) from financing activities	3,695		(1,777)		391
Effect of foreign currency rate changes on cash and cash equivalents	(145)		(139)		(7)
Net increase (decrease) in cash	1,120		76		(36)
Cash – beginning of year	655	[1],[2],[3]	579	[1],[4]	615	[4]
Cash – end of year	1,775	[2],[5]	655	[1],[2],[3]	579	[1],[4]
Supplemental cash flow information
Taxes paid	469		349		218
Interest paid	$ 259		$ 264		$ 253

[1] Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2014 and 2013, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[2] Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2015 and 2014, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[3] Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2014, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[4] Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2013 and 2012, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[5] Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2015, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

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Consolidated Statements Of Cash Flows (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Cash Flows [Abstract]
Acquisition of subsidiaries, cash acquired	$ 629	$ 20	$ 38

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Summary of significant accounting policies

12 Months Ended

Dec. 31, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of significant accounting policies

Summary of significant accounting policies

a) Basis of presentation

On January 14, 2016, we completed the acquisition of The Chubb Corporation, creating a global leader in property and casualty insurance. We have changed our name from ACE Limited to Chubb Limited and plan to adopt the Chubb name globally. All references to Chubb Limited throughout this Form 10-K refer to legacy ACE Limited, unless otherwise indicated. The financial condition and results presented herein are those of legacy ACE Limited and its subsidiaries and do not include the results of legacy Chubb Corporation and its subsidiaries.

Chubb Limited is a holding company incorporated in Zurich, Switzerland. Chubb Limited, through its subsidiaries, provides a broad range of insurance and reinsurance products to insureds worldwide. Through December 31, 2015 Chubb operated through five business segments: Insurance – North American P&C, Insurance – North American Agriculture, Insurance – Overseas General, Global Reinsurance, and Life. Refer to Note 16 for additional information.

The accompanying consolidated financial statements, which include the accounts of Chubb Limited and its subsidiaries (collectively, Chubb, we, us, or our), have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) and, in the opinion of management, reflect all adjustments (consisting of normally recurring accruals) necessary for a fair statement of the results and financial position for such periods. All significant intercompany accounts and transactions, including internal reinsurance transactions, have been eliminated.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Amounts included in the consolidated financial statements reflect our best estimates and assumptions; actual amounts could differ materially from these estimates. Chubb's principal estimates include:

• unpaid loss and loss expense reserves, including long-tail asbestos and environmental (A&E) reserves;

• future policy benefits reserves;

• the valuation of value of business acquired (VOBA) and amortization of deferred policy acquisition costs and VOBA;

• reinsurance recoverable, including a provision for uncollectible reinsurance;

• the assessment of risk transfer for certain structured insurance and reinsurance contracts;

• the valuation of the investment portfolio and assessment of OTTI;

• the valuation of deferred tax assets;

• the valuation of derivative instruments related to guaranteed living benefits (GLB); and

• the assessment of goodwill for impairment.

Effective 2015, amortization of intangible assets are excluded from Other (income) expense and disclosed separately in the consolidated statements of operations. In addition, repurchase agreements, previously included within short-term debt, are now separately disclosed in the consolidated balance sheets. Prior year amounts have been reclassified to conform to the current year presentation.

We also added a new expense caption (Chubb integration expenses) on the consolidated statements of operations which includes legal and professional fees and all other external costs directly related to the integration activities of the Chubb acquisition.

b) Premiums

Premiums are generally recorded as written upon inception of the policy. For multi-year policies for which premiums written are payable in annual installments, only the current annual premium is included as written at policy inception due to the ability of the insured/reinsured to commute or cancel coverage within the policy term. The remaining annual premiums are recorded as written at each successive anniversary date within the multi-year term.

For property and casualty (P&C) insurance and reinsurance products, premiums written are primarily earned on a pro-rata basis over the policy terms to which they relate. Unearned premiums represent the portion of premiums written applicable to the unexpired portion of the policies in force. For retrospectively-rated policies, written premiums are adjusted to reflect expected ultimate premiums consistent with changes to incurred losses, or other measures of exposure as stated in the policy, and earned over the policy coverage period. For retrospectively-rated multi-year policies, premiums recognized in the current period are computed, using a with-and-without method, as the difference between the ceding enterprise's total contract costs before and after the experience under the contract at the reporting date. Accordingly, for retrospectively-rated multi-year policies, additional premiums are generally written and earned when losses are incurred.

Mandatory reinstatement premiums assessed on reinsurance policies are earned in the period of the loss event that gave rise to the reinstatement premiums.  All remaining unearned premiums are recognized over the remaining coverage period. 

Premiums from long-duration contracts such as certain traditional term life, whole life, endowment, and long-duration personal accident and health (A&H) policies are generally recognized as revenue when due from policyholders. Traditional life policies include those contracts with fixed and guaranteed premiums and benefits. Benefits and expenses are matched with income to result in the recognition of profit over the life of the contracts.

Retroactive loss portfolio transfer (LPT) contracts in which the insured loss events occurred prior to contract inception are evaluated to determine whether they meet criteria for reinsurance accounting. If reinsurance accounting is appropriate, written premiums are fully earned and corresponding losses and loss expenses recognized at contract inception. These contracts can cause significant variances in gross premiums written, net premiums written, net premiums earned, and net incurred losses in the years in which they are written. Reinsurance contracts sold not meeting criteria for reinsurance accounting are recorded using the deposit method as described below in Note 1 k).

Reinsurance premiums assumed are based on information provided by ceding companies supplemented by our own estimates of premium when we have not received ceding company reports. Estimates are reviewed and adjustments are recorded in the period in which they are determined. Premiums are earned over the coverage terms of the related reinsurance contracts and range from one to three years.

c) Deferred policy acquisition costs and value of business acquired

Policy acquisition costs consist of commissions (direct and ceded), premium taxes, and certain underwriting costs related directly to the successful acquisition of new or renewal insurance contracts. A VOBA intangible asset is established upon the acquisition of blocks of long-duration contracts in a business combination and represents the present value of estimated net cash flows for the contracts in force at the acquisition date. Acquisition costs and VOBA, collectively policy acquisition costs, are deferred and amortized. Amortization is recorded in Policy acquisition costs in the consolidated statements of operations. Policy acquisition costs on P&C contracts are generally amortized ratably over the period in which premiums are earned. Policy acquisition costs on traditional long-duration contracts are amortized over the estimated life of the contracts, generally in proportion to premium revenue recognized based upon the same assumptions used in estimating the liability for future policy benefits. For non-traditional long-duration contracts, we amortize policy acquisition costs over the expected life of the contracts in proportion to expected gross profits.  The effect of changes in estimates of expected gross profits is reflected in the period the estimates are revised. Policy acquisition costs are reviewed to determine if they are recoverable from future income, including investment income. Unrecoverable policy acquisition costs are expensed in the period identified.

Advertising costs are expensed as incurred except for direct-response campaigns that qualify for cost deferral, principally related to long-duration A&H business produced by the Insurance – Overseas General segment, which are deferred and recognized as a component of Policy acquisition costs. For individual direct-response marketing campaigns that we can demonstrate have specifically resulted in incremental sales to customers and such sales have probable future economic benefits, incremental costs directly related to the marketing campaigns are capitalized as Deferred policy acquisition costs. Deferred policy acquisition costs, including deferred marketing costs, are reviewed regularly for recoverability from future income, including investment income, and amortized in proportion to premium revenue recognized, primarily over a ten-year period, the expected economic future benefit period based upon the same assumptions used in estimating the liability for future policy benefits. The expected future benefit period is evaluated periodically based on historical results and adjusted prospectively. The amount of deferred marketing costs reported in Deferred policy acquisition costs in the consolidated balance sheets was $250 million and $288 million at December 31, 2015 and 2014, respectively. Amortization expense for deferred marketing costs was $78 million, $99 million, and $128 million for the years ended December 31, 2015, 2014, and 2013, respectively.

d) Reinsurance

Chubb assumes and cedes reinsurance with other insurance companies to provide greater diversification of business and minimize the net loss potential arising from large risks. Ceded reinsurance contracts do not relieve Chubb of its primary obligation to policyholders.

For both ceded and assumed reinsurance, risk transfer requirements must be met in order to account for a contract as reinsurance, principally resulting in the recognition of cash flows under the contract as premiums and losses. To meet risk transfer requirements, a reinsurance contract must include insurance risk, consisting of both underwriting and timing risk, and a reasonable possibility of a significant loss for the assuming entity. To assess risk transfer for certain contracts, Chubb generally develops expected discounted cash flow analyses at contract inception. Deposit accounting is used for contracts that do not meet risk transfer requirements. Deposit accounting requires that consideration received or paid be recorded in the balance sheet as opposed to recording premiums written or losses incurred in the statement of operations. Non-refundable fees on deposit contracts are earned based on the terms of the contract described below in Note 1 k).

Reinsurance recoverable includes balances due from reinsurance companies for paid and unpaid losses and loss expenses and policy benefits that will be recovered from reinsurers, based on contracts in force. The method for determining the reinsurance recoverable on unpaid losses and loss expenses incurred but not reported (IBNR) involves actuarial estimates consistent with those used to establish the associated liability for unpaid losses and loss expenses as well as a determination of Chubb's ability to cede unpaid losses and loss expenses under the terms of the reinsurance agreement.

Reinsurance recoverable is presented net of a provision for uncollectible reinsurance determined based upon a review of the financial condition of reinsurers and other factors. The provision for uncollectible reinsurance is based on an estimate of the reinsurance recoverable balance that will ultimately be unrecoverable due to reinsurer insolvency, a contractual dispute, or any other reason. The valuation of this provision includes several judgments including certain aspects of the allocation of reinsurance recoverable on IBNR claims by reinsurer and a default analysis to estimate uncollectible reinsurance. The primary components of the default analysis are reinsurance recoverable balances by reinsurer, net of collateral, and default factors used to determine the portion of a reinsurer's balance deemed uncollectible. The definition of collateral for this purpose requires some judgment and is generally limited to assets held in a Chubb-only beneficiary trust, letters of credit, and liabilities held with the same legal entity for which Chubb believes there is a contractual right of offset. The determination of the default factor is principally based on the financial strength rating of the reinsurer. Default factors require considerable judgment and are determined using the current financial strength rating, or rating equivalent, of each reinsurer as well as other key considerations and assumptions. The more significant considerations include, but are not necessarily limited to, the following:

• For reinsurers that maintain a financial strength rating from a major rating agency, and for which recoverable balances are considered representative of the larger population (i.e., default probabilities are consistent with similarly rated reinsurers and payment durations conform to averages), the financial rating is based on a published source and the default factor is based on published default statistics of a major rating agency applicable to the reinsurer's particular rating class. When a recoverable is expected to be paid in a brief period of time by a highly rated reinsurer, such as certain property catastrophe claims, a default factor may not be applied;

• For balances recoverable from reinsurers that are both unrated by a major rating agency and for which management is unable to determine a credible rating equivalent based on a parent, affiliate, or peer company, we determine a rating equivalent based on an analysis of the reinsurer that considers an assessment of the creditworthiness of the particular entity, industry benchmarks, or other factors as considered appropriate. We then apply the applicable default factor for that rating class. For balances recoverable from unrated reinsurers for which the ceded reserve is below a certain threshold, we generally apply a default factor of 34 percent, consistent with published statistics of a major rating agency;

• For balances recoverable from reinsurers that are either insolvent or under regulatory supervision, we establish a default factor and resulting provision for uncollectible reinsurance based on reinsurer-specific facts and circumstances. Upon initial notification of an insolvency, we generally recognize an expense for a substantial portion of all balances outstanding, net of collateral, through a combination of write-offs of recoverable balances and increases to the provision for uncollectible reinsurance. When regulatory action is taken on a reinsurer, we generally recognize a default factor by estimating an expected recovery on all balances outstanding, net of collateral. When sufficient credible information becomes available, we adjust the provision for uncollectible reinsurance by establishing a default factor pursuant to information received; and

• For other recoverables, management determines the provision for uncollectible reinsurance based on the specific facts and circumstances.

The methods used to determine the reinsurance recoverable balance and related provision for uncollectible reinsurance are regularly reviewed and updated, and any resulting adjustments are reflected in earnings in the period identified.

Prepaid reinsurance premiums represent the portion of premiums ceded to reinsurers applicable to the unexpired coverage terms of the reinsurance contracts in force.

The value of reinsurance business assumed of $21 million and $26 million at December 31, 2015 and 2014, respectively, included in Other assets in the accompanying consolidated balance sheets, represents the excess of estimated ultimate value of the liabilities assumed under retroactive reinsurance contracts over consideration received. The value of reinsurance business assumed is amortized and recorded to losses and loss expenses based on the payment pattern of the losses assumed and ranges between 9 and 40 years. The unamortized value is reviewed regularly to determine if it is recoverable based upon the terms of the contract, estimated losses and loss expenses, and anticipated investment income. Unrecoverable amounts are expensed in the period identified.

e) Investments

Fixed maturities are classified as either available for sale or held to maturity. The available for sale portfolio is reported at fair value. The held to maturity portfolio includes securities for which we have the ability and intent to hold to maturity or redemption and is reported at amortized cost. Equity securities are classified as available for sale and are recorded at fair value. Short-term investments comprise securities due to mature within one year of the date of purchase and are recorded at fair value which typically approximates cost. Short-term investments include certain cash and cash equivalents, which are part of investment portfolios under the management of external investment managers.

Other investments principally comprise life insurance policies, policy loans, trading securities, other direct equity investments, investment funds, and limited partnerships.

• Life insurance policies are carried at policy cash surrender value and income is recorded in other income (expense).

• Policy loans are carried at outstanding balance and interest income is recorded to net investment income.

• Trading securities are recorded on a trade date basis and carried at fair value. Unrealized gains and losses on trading securities are reflected in Other (income) expense.

• Other investments over which Chubb can exercise significant influence are accounted for using the equity method and income is recorded in Other (income) expense.

• All other investments over which Chubb cannot exercise significant influence are carried at fair value with changes in fair value recognized through OCI. For these investments, investment income is recognized in net investment income and realized gains are recognized as related distributions are received.

• Partially-owned investment companies comprise entities in which we hold an ownership interest in excess of three percent. These investments as well as Chubb's investments in investment funds where our ownership interest is in excess of three percent are accounted for under the equity method because Chubb exerts significant influence. These investments apply investment company accounting to determine operating results, and Chubb retains the investment company accounting in applying the equity method. This means that investment income, realized gains or losses, and unrealized gains or losses are included in the portion of equity earnings reflected in Other (income) expense.

Investments in partially-owned insurance companies primarily represent direct investments in which Chubb has significant influence and, as such, meet the requirements for equity accounting. We report our share of the net income or loss of the partially-owned insurance companies in Other (income) expense.

Realized gains or losses on sales of investments are determined on a first-in, first-out basis. Unrealized appreciation (depreciation) on investments is included as a separate component of AOCI in Shareholders' equity. We regularly review our investments for OTTI. Refer to Note 3 for additional information.

With respect to securities where the decline in value is determined to be temporary and the security's value is not written down, a subsequent decision may be made to sell that security and realize a loss. Subsequent decisions on security sales are the result of changing or unforeseen facts and circumstances (i.e., arising from a large insured loss such as a catastrophe), deterioration of the creditworthiness of the issuer or its industry, or changes in regulatory requirements. We believe that subsequent decisions to sell such securities are consistent with the classification of the majority of the portfolio as available for sale.

We use derivative instruments including futures, options, swaps, and foreign currency forward contracts for the purpose of managing certain investment portfolio risks and exposures. Refer to Note 10 for additional information. Derivatives are reported at fair value and are recorded in the accompanying consolidated balance sheets in either Accounts payable, accrued expenses, and other liabilities or Other assets with changes in fair value included in Net realized gains (losses) in the consolidated statements of operations. Collateral held by brokers equal to a percentage of the total value of open futures contracts is included in the investment portfolio.

Net investment income includes interest and dividend income and amortization of fixed maturity market premiums and discounts and is net of investment management and custody fees. For mortgage-backed securities, and any other holdings for which there is a prepayment risk, prepayment assumptions are evaluated and revised as necessary. Any adjustments required due to the resultant change in effective yields and maturities are recognized prospectively. Prepayment fees or call premiums that are only payable when a security is called prior to its maturity are earned when received and reflected in Net investment income. 

Chubb participates in a securities lending program operated by a third-party banking institution whereby certain assets are loaned to qualified borrowers and from which we earn an incremental return. Borrowers provide collateral, in the form of either cash or approved securities, of 102 percent of the fair value of the loaned securities.  Each security loan is deemed to be an overnight transaction.  Cash collateral is invested in a collateral pool which is managed by the banking institution.  The collateral pool is subject to written investment guidelines with key objectives which include the safeguard of principal and adequate liquidity to meet anticipated redemptions. The fair value of the loaned securities is monitored on a daily basis, with additional collateral obtained or refunded as the fair value of the loaned securities changes. The collateral is held by the third-party banking institution, and the collateral can only be accessed in the event that the institution borrowing the securities is in default under the lending agreement. As a result of these restrictions, we consider our securities lending activities to be non-cash investing and financing activities. An indemnification agreement with the lending agent protects us in the event a borrower becomes insolvent or fails to return any of the securities on loan. The fair value of the securities on loan is included in fixed maturities and equity securities. The securities lending collateral is reported as a separate line in total assets with a related liability reflecting our obligation to return the collateral plus interest.

Similar to securities lending arrangements, securities sold under repurchase agreements, whereby Chubb sells securities and repurchases them at a future date for a predetermined price, are accounted for as collateralized investments and borrowings and are recorded at the contractual repurchase amounts plus accrued interest. Assets to be repurchased are the same, or substantially the same, as the assets transferred and the transferor, through right of substitution, maintains the right and ability to redeem the collateral on short notice. The fair value of the underlying securities is included in fixed maturities and equity securities. In contrast to securities lending programs, the use of cash received is not restricted. We report the obligation to return the cash as Repurchase agreements in the consolidated balance sheets.

Refer to Note 4 for a discussion on the determination of fair value for Chubb's various investment securities.

f) Cash

Cash includes cash on hand and deposits with an original maturity of three months or less at time of purchase. Cash held by external money managers is included in Short-term investments.

We have agreements with a third-party bank provider which implemented two international multi-currency notional cash pooling programs. In each program, participating Chubb entities establish deposit accounts in different currencies with the bank provider and each day the credit or debit balances in every account are notionally translated into a single currency (U.S. dollars) and then notionally pooled. The bank extends overdraft credit to any participating Chubb entity as needed, provided that the overall notionally-pooled balance of all accounts in each pool at the end of each day is at least zero. Actual cash balances are not physically converted and are not commingled between legal entities. Any overdraft balances incurred under this program by a Chubb entity would be guaranteed by Chubb Limited (up to $300 million in the aggregate). Our syndicated letter of credit facility allows for same day drawings to fund a net pool overdraft should participating Chubb entities overdraw contributed funds from the pool.

g) Goodwill and other intangible assets

Goodwill represents the excess of the cost of acquisitions over the fair value of net assets acquired and is not amortized. Goodwill is assigned at acquisition to the applicable reporting unit of the acquired entities giving rise to the goodwill. Goodwill impairment tests are performed annually or more frequently if circumstances indicate a possible impairment.  For goodwill impairment testing, we use a qualitative assessment to determine whether it is more likely than not (i.e., more than a 50 percent probability) that the fair value of a reporting unit is greater than its carrying amount. If our assessment indicates less than a 50 percent probability that fair value exceeds carrying value, we quantitatively estimate a reporting unit's fair value. Goodwill recorded in connection with investments in partially-owned insurance companies is recorded in Investments in partially-owned insurance companies and is also measured for impairment annually.

Indefinite lived intangible assets are not subject to amortization. Finite lived intangible assets are amortized over their useful lives, generally ranging from 1 to 30 years. Intangible assets are regularly reviewed for indicators of impairment. Impairment is recognized if the carrying amount is not recoverable from its undiscounted cash flows and is measured as the difference between the carrying amount and fair value.

h) Unpaid losses and loss expenses

A liability is established for the estimated unpaid losses and loss expenses under the terms of, and with respect to, Chubb's policies and agreements. Similar to premiums that are recognized as revenues over the coverage period of the policy, a liability for unpaid losses and loss expenses is recognized as expense when insured events occur over the coverage period of the policy. This liability includes a provision for both reported claims (case reserves) and incurred but not reported claims (IBNR reserves). IBNR reserve estimates are generally calculated by first projecting the ultimate cost of all losses that have occurred (expected losses), and then subtracting paid losses, case reserves, and loss expenses. The methods of determining such estimates and establishing the resulting liability are reviewed regularly and any adjustments are reflected in operations in the period in which they become known. Future developments may result in losses and loss expenses materially greater or less than recorded amounts.

Except for net loss and loss expense reserves of $42 million net of discount, held at December 31, 2015, representing certain structured settlements for which the timing and amount of future claim payments are reliably determinable and $50 million, net of discount, of certain reserves for unsettled claims that are discounted in statutory filings, Chubb does not discount its P&C loss reserves. This compares with reserves of $49 million for certain structured settlements and $62 million of certain reserves for unsettled claims at December 31, 2014. Structured settlements represent contracts purchased from life insurance companies primarily to settle workers' compensation claims, where payments to the claimant by the life insurance company are expected to be made in the form of an annuity. Chubb retains the liability to the claimant in the event that the life insurance company fails to pay. At December 31, 2015, the gross liability due to claimants was $588 million, net of discount, and reinsurance recoverables due from the life insurance companies was $546 million, net of discount. For structured settlement contracts where payments are guaranteed regardless of claimant life expectancy, the amounts recoverable from the life insurance companies at December 31, 2015 are included in Other assets in the consolidated balance sheets, as they do not meet the requirements for reinsurance accounting.

Included in Unpaid losses and loss expenses are liabilities for asbestos and environmental (A&E) claims and expenses. These unpaid losses and loss expenses are principally related to claims arising from remediation costs associated with hazardous waste sites and bodily-injury claims related to asbestos products and environmental hazards. The estimation of these liabilities is particularly sensitive to changes in the legal environment including specific settlements that may be used as precedents to settle future claims. However, Chubb does not anticipate future changes in laws and regulations in setting its A&E reserve levels.

Prior period development arises from changes to loss estimates recognized in the current year that relate to loss reserves first reported in previous calendar years and excludes the effect of losses from the development of earned premiums from previous accident years.

For purposes of analysis and disclosure, management views prior period development to be changes in the nominal value of loss estimates from period to period, net of premium and profit commission adjustments on loss sensitive contracts. Prior period development generally excludes changes in loss estimates that do not arise from the emergence of claims, such as those related to uncollectible reinsurance, interest, unallocated loss adjustment expenses, or foreign currency. Accordingly, specific items excluded from prior period development include the following: gains/losses related to foreign currency remeasurement; losses recognized from the early termination or commutation of reinsurance agreements that principally relate to the time value of money; changes in the value of reinsurance business assumed reflected in losses incurred but principally related to the time value of money; and losses that arise from changes in estimates of earned premiums from prior accident years. Except for foreign currency remeasurement, which is included in Net realized gains (losses), these items are included in current year losses.

i) Future policy benefits

The valuation of long-duration contract reserves requires management to make estimates and assumptions regarding expenses, mortality, persistency, and investment yields. Estimates are primarily based on historical experience and information provided by ceding companies and include a margin for adverse deviation. Interest rates used in calculating reserves range from less than 1.0 percent to 7.2 percent and less than 1.0 percent to 6.5 percent at December 31, 2015 and 2014, respectively. Actual results could differ materially from these estimates. Management monitors actual experience and where circumstances warrant, will revise assumptions and the related reserve estimates. Revisions are recorded in the period they are determined.

Certain of our long-duration contracts are supported by assets that do not qualify for separate account reporting under GAAP. These assets are classified as trading securities and reported in Other investments and the offsetting liabilities are reported in Future policy benefits in the consolidated balance sheets. Changes in the fair value of separate account assets that do not qualify for separate account reporting under GAAP are reported in Other income (expense) and the offsetting movements in the liabilities are included in Policy benefits in the consolidated statements of operations.

j) Assumed reinsurance programs involving minimum benefit guarantees under variable annuity contracts

Chubb reinsures various death and living benefit guarantees associated with variable annuities issued primarily in the United States and Japan. We generally receive a monthly premium during the accumulation phase of the covered annuities (in-force) based on a percentage of either the underlying accumulated account values or the underlying accumulated guaranteed values. Depending on an annuitant's age, the accumulation phase can last many years. To limit our exposure under these programs, all reinsurance treaties include annual or aggregate claim limits and many include an aggregate deductible.

The guarantees which are payable on death, referred to as guaranteed minimum death benefits (GMDB), principally cover shortfalls between accumulated account value at the time of an annuitant's death and either i) an annuitant's total deposits; ii) an annuitant's total deposits plus a minimum annual return; or iii) the highest accumulated account value attained at any policy anniversary date. In addition, a death benefit may be based on a formula specified in the variable annuity contract that uses a percentage of the growth of the underlying contract value. Liabilities for GMDBs are based on cumulative assessments or premiums to date multiplied by a benefit ratio that is determined by estimating the present value of benefit payments and related adjustment expenses divided by the present value of cumulative assessment or expected premiums during the contract period.  

Under reinsurance programs covering GLBs, we assume the risk of guaranteed minimum income benefits (GMIB) and guaranteed minimum accumulation benefits (GMAB) associated with variable annuity contracts. The GMIB risk is triggered if, at the time the contract holder elects to convert the accumulated account value to a periodic payment stream (annuitize), the accumulated account value is not sufficient to provide a guaranteed minimum level of monthly income. The GMAB risk is triggered if, at contract maturity, the contract holder's account value is less than a guaranteed minimum value. Our GLB reinsurance products meet the definition of a derivative for accounting purposes and is carried at fair value with changes in fair value recognized in income. Refer to Notes 5c) and 10 a) for additional information.

k) Deposit assets and liabilities

Deposit assets arise from ceded reinsurance contracts purchased that do not transfer significant underwriting or timing risk. Deposit liabilities include reinsurance deposit liabilities and contract holder deposit funds. The reinsurance deposit liabilities arise from contracts sold for which there is not a significant transfer of risk. Contract holder deposit funds represent a liability for investment contracts sold that do not meet the definition of an insurance contract, and certain of these contracts are sold with a guaranteed rate of return. Under deposit accounting, consideration received or paid is recorded as a deposit asset or liability in the balance sheet as opposed to recording premiums and losses in the statement of operations.

Interest income on deposit assets, representing the consideration received or to be received in excess of cash payments related to the deposit contract, is earned based on an effective yield calculation. The calculation of the effective yield is based on the amount and timing of actual cash flows at the balance sheet date and the estimated amount and timing of future cash flows. The effective yield is recalculated periodically to reflect revised estimates of cash flows. When a change in the actual or estimated cash flows occurs, the resulting change to the carrying amount of the deposit asset is reported as income or expense. Deposit assets of $86 million and $89 million at December 31, 2015 and 2014, respectively, are reflected in Other assets in the consolidated balance sheets and the accretion of deposit assets related to interest pursuant to the effective yield calculation is reflected in Net investment income in the consolidated statements of operations.

Deposit liabilities include reinsurance deposit liabilities of $110 million and $120 million and contract holder deposit funds of $1.1 billion and $908 million at December 31, 2015 and 2014, respectively. Deposit liabilities are reflected in Accounts payable, accrued expenses, and other liabilities in the consolidated balance sheets. At contract inception, the deposit liability equals net cash received. An accretion rate is established based on actuarial estimates whereby the deposit liability is increased to the estimated amount payable over the contract term. The deposit accretion rate is the rate of return required to fund expected future payment obligations. We periodically reassess the estimated ultimate liability and related expected rate of return. Changes to the deposit liability are generally reflected through Interest expense to reflect the cumulative effect of the period the contract has been in force, and by an adjustment to the future accretion rate of the liability over the remaining estimated contract term.

The liability for contract holder deposit funds equals accumulated policy account values, which consist of the deposit payments plus credited interest less withdrawals and amounts assessed through the end of the period.

l) Foreign currency remeasurement and translation

The functional currency for each of our foreign operations is generally the currency of the local operating environment. Transactions in currencies other than a foreign operation's functional currency are remeasured into the functional currency and the resulting foreign exchange gains and losses are reflected in Net realized gains (losses) in the consolidated statements of operations. Functional currency assets and liabilities are translated into the reporting currency, U.S. dollars, using period end exchange rates and the related translation adjustments are recorded as a separate component of AOCI. Functional statement of operations amounts expressed in functional currencies are translated using average exchange rates.

m) Administrative expenses

Administrative expenses generally include all operating costs other than policy acquisition costs. The Insurance – North American P&C segment manages and uses an in-house third-party claims administrator, ESIS Inc. (ESIS).  ESIS performs claims management and risk control services for domestic and international organizations that self-insure P&C exposures as well as internal P&C exposures.  The net operating results of ESIS are included within Administrative expenses in the consolidated statements of operations and were $30 million, $27 million, and $25 million for the years ended December 31, 2015, 2014, and 2013, respectively.

n) Income taxes

Income taxes have been recorded related to those operations subject to income taxes. Deferred tax assets and liabilities result from temporary differences between the amounts recorded in the consolidated financial statements and the tax basis of our assets and liabilities. Refer to Note 8 for additional information. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. A valuation allowance against deferred tax assets is recorded if it is more likely than not that all, or some portion, of the benefits related to deferred tax assets will not be realized. The valuation allowance assessment considers tax planning strategies, where applicable.

We recognize uncertain tax positions deemed more likely than not of being sustained upon examination.  Recognized income tax positions are measured at the largest amount that is greater than 50 percent likely of being realized. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs.

o) Earnings per share

Basic earnings per share is calculated using the weighted-average shares outstanding including participating securities with non-forfeitable rights to dividends such as unvested restricted stock. All potentially dilutive securities including stock options are excluded from the basic earnings per share calculation. In calculating diluted earnings per share, the weighted-average shares outstanding is increased to include all potentially dilutive securities. Basic and diluted earnings per share are calculated by dividing net income by the applicable weighted-average number of shares outstanding during the year.

p) Cash flow information

Premiums received and losses paid associated with the GLB reinsurance products, which as discussed previously meet the definition of a derivative instrument for accounting purposes, are included within Cash flows from operating activities.  Cash flows, such as settlements and collateral requirements, associated with GLB and all other derivative instruments are included on a net basis within Cash flows from investing activities. Purchases, sales, and maturities of short-term investments are recorded on a net basis within Cash flows from investing activities.

q) Derivatives

Chubb recognizes all derivatives at fair value in the consolidated balance sheets and participates in derivative instruments in two principal ways:

(i)To sell protection to customers as an insurance or reinsurance contract that meets the definition of a derivative for accounting purposes. For 2015 and 2014, the reinsurance of GLBs was our primary product falling into this category; and

(ii)To mitigate financial risks, principally arising from investment holdings, products sold, or assets and liabilities held in foreign currencies. For these instruments, changes in assets or liabilities measured at fair value are recorded as realized gains or losses in the consolidated statement of operations.

We did not designate any derivatives as accounting hedges during 2015, 2014, or 2013.

r) Share-based compensation

Chubb measures and records compensation cost for all share-based payment awards at grant-date fair value. Compensation costs are recognized for share-based payment awards with only service conditions that have graded vesting schedules on a straight-line basis over the requisite service period for each separately vesting portion of the award as if the award was, in substance, multiple awards. Refer to Note 12 for additional information.

s) New accounting pronouncements

Adopted in 2015

Business Combinations – Simplifying the Accounting for Measurement-Period Adjustments

In September 2015, the Financial Accounting Standards Board (FASB) issued guidance to simplify the accounting for adjustments made to provisional valuation amounts recognized in a business combination. The guidance requires that the acquirer must recognize adjustments to provisional valuation amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined.  The guidance eliminates the requirement to retrospectively account for such adjustments. Previously, the accounting for measurement-period adjustments required the acquirer to retrospectively adjust the provisional amounts recognized at the acquisition date with a corresponding adjustment to goodwill.  We early adopted this guidance effective July 1, 2015.  The adoption of this guidance did not have an impact on our financial condition or results of operations.

Disclosures for investments in certain entities that calculate net asset value (NAV)

In May 2015, the FASB issued guidance that eliminated the requirement for investments measured at fair value using NAV as a practical expedient to be categorized within the fair value hierarchy. We adopted this guidance early, effective July 1, 2015 and have retrospectively revised prior year fair value hierarchy disclosures contained in this report to conform to the current period presentation. Refer to Note 4 Fair Value Measurement for further information. This guidance requires a change in disclosure only and adoption of this guidance did not have an impact on our financial condition or results of operations.

Adopted in 2016

Presentation of Debt Issuance Costs

In April 2015, the FASB issued new guidance related to the accounting for debt issuance costs.  The new guidance requires presentation of debt issuance costs in the balance sheet as a deduction from the carrying amount of the related debt liability instead of a deferred charge.  The new guidance requires retrospective adoption and is effective for interim and annual reporting periods beginning after December 15, 2015, with early adoption permitted. Adoption of this guidance will require us to present debt issuance costs, currently recorded in Other assets on the consolidated balance sheets, within Long-term debt.This guidance, which became effective on January 1, 2016, did not have any effect on our results of operations and financial condition.

Accounting guidance not yet adopted

Revenue from Contracts with Customers

In May 2014, the FASB issued an accounting standard that supersedes most existing revenue recognition guidance. The standard excludes from its scope the accounting for insurance contracts, leases, financial instruments, and certain other agreements that are governed under other GAAP guidance, but could affect the revenue recognition for certain of our claims management and risk control services. The updated guidance requires an entity to recognize revenue as performance obligations are met, in order to reflect the transfer of promised goods or services to customers in an amount that reflects the consideration the entity is entitled to receive for those goods or services. The standard is effective for interim and annual reporting periods beginning after December 15, 2017 and may be applied retrospectively or through a cumulative effect adjustment to retained earnings at the date of adoption. Early adoption is permitted only as of annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. The adoption of this guidance is not expected to have a material impact on our financial condition or results of operations.

Short-Duration Contracts

In May 2015, the FASB issued guidance that requires additional disclosures for short-duration insurance contracts. New disclosure will be required to provide more information about initial claim estimates and subsequent adjustments to those estimates, the methodologies and judgments used to estimate claims, and the timing frequency, and severity of claims. The guidance is effective for public business entities for annual periods beginning after December 15, 2015 and interim periods within annual periods after December 15, 2016. The guidance requires a change in disclosure only and adoption of this guidance will have no impact on our financial condition or results of operations.

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Acquisitions

12 Months Ended

Dec. 31, 2015

Business Combinations [Abstract]

Acquisitions

Acquisitions

Fireman's Fund Insurance Company High Net Worth Personal Lines Insurance Business in the U.S. (Fireman's Fund)

On April 1, 2015, we acquired the Fireman's Fund Insurance Company high net worth personal lines insurance business in the U.S., which included the renewal rights for new and existing business and reinsurance of all existing reserves for $365 million in cash. We acquired assets with a fair value of $753 million, consisting primarily of cash of $629 million and insurance and reinsurance balances receivable of $124 million. We assumed liabilities with a fair value of $863 million, consisting primarily of unpaid losses and loss expenses of $417 million and unearned premiums of $428 million. This acquisition generated $196 million of goodwill, attributable to expected growth and profitability, all of which is expected to be deductible for income tax purposes, and other intangible assets of $278 million, primarily related to renewal rights, based on Chubb’s preliminary purchase price allocation. During the third quarter of 2015, we applied the new measurement-period adjustment guidance and recorded an adjustment to the valuation of our other intangible assets. The acquisition expands our position in the high net worth personal lines insurers in the U.S. The Fireman’s Fund business integrates into our existing high net worth personal lines business, ACE Private Risk Services, which offers a broad range of coverage including homeowners, automobile, umbrella and excess liability, collectibles and yachts. Goodwill and other intangible assets arising from this acquisition are included in our Insurance – North American P&C segment.

Prior year acquisitions

Large Corporate Account P&C Insurance Business of Itaú Seguros, S.A. (Itaú Seguros)

On October 31, 2014, we expanded our presence in Brazil with the acquisition of the large corporate account property and casualty (P&C) insurance business of Itaú Seguros, Brazil's leading carrier for that business, for $606 million in cash. This acquisition generated $445 million of goodwill, attributable to expected growth and profitability, and other intangible assets of $60 million, primarily related to renewal rights based on Chubb's purchase price allocation. During the fourth quarter of 2015, goodwill became deductible for income tax purposes under Brazilian tax law when we merged Itaú Seguros with a Chubb subsidiary.

The Siam Commercial Samaggi Insurance PCL (Samaggi)

We and our local partner acquired 60.86 percent of Samaggi, a general insurance company in Thailand, from Siam Commercial Bank on April 28, 2014, and subsequently acquired an additional 32.17 percent ownership, through a mandatory tender offer, which expired on June 17, 2014. The purchase price for 93.03 percent of the company was $176 million in cash. This acquisition expands our presence in Thailand and Southeast Asia.

The acquisition generated $46 million of goodwill, attributable to expected growth and profitability, none of which is expected to be deductible for income tax purposes, and other intangible assets of $80 million based on Chubb’s purchase price allocation. The other intangible assets primarily relate to a bancassurance agreement.

ABA Seguros

On May 2, 2013, we acquired ABA Seguros, a property and casualty insurer in Mexico that provides automobile, homeowners, and small business coverages, for approximately $690 million in cash.

The acquisition generated $285 million of goodwill, attributable to expected growth and profitability, none of which is expected to be deductible for income tax purposes, and other intangible assets of $140 million based on Chubb’s purchase price allocation. The other intangible assets primarily relate to distribution channels.

Fianzas Monterrey

On April 1, 2013, we acquired Fianzas Monterrey, a leading surety lines company in Mexico offering administrative performance bonds primarily to clients in the construction and industrial sectors, for approximately $293 million in cash. This acquisition expands our global franchise in the surety business and enhances our existing commercial lines and personal accident insurance business in Mexico.

The acquisition generated $137 million of goodwill, attributable to expected growth and profitability, none of which is expected to be deductible for income tax purposes, and other intangible assets of $73 million, based on Chubb's purchase price allocation. The other intangible assets primarily relate to customer lists.

PT Asuransi Jaya Proteksi

We acquired 80 percent of PT Asuransi Jaya Proteksi (JaPro) on September 18, 2012 and our local partner acquired the remaining 20 percent on January 3, 2013. JaPro is one of Indonesia's leading general insurers offering personal lines and commercial coverages. This acquisition diversifies our existing business in Indonesia. The total purchase price for 100 percent of the company was approximately $107 million in cash.

Goodwill and other intangible assets arising from the prior year acquisitions described above are included in our Insurance – Overseas General segment.

The consolidated financial statements include results of acquired businesses from the acquisition dates.

Acquired in 2016

The Chubb Corporation

On January 14, 2016, we completed the acquisition of The Chubb Corporation (Chubb acquisition), a leading provider of middle-market commercial, specialty, surety, and personal insurance for $29.5 billion, comprising $14.3 billion in cash and $15.2 billion in newly-issued stock, based on the Chubb Limited (formerly ACE Limited) closing price on the acquisition date. In addition, we assumed outstanding equity awards to employees, directors, and consultants with an attributed value of approximately $340 million. We financed the cash portion of the transaction through a combination of $9 billion sourced from various Chubb Limited and Chubb Corporation companies plus $5.3 billion of senior notes which were issued in November 2015. Refer to Note 9 for additional information on the senior notes. Under the terms of the merger agreement, The Chubb Corporation merged with a newly-formed subsidiary of Chubb Limited and the combined company is operating under the Chubb name globally.

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Investments

12 Months Ended

Dec. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Investments

Investments

a) Transfers of securities

During April 2015, we transferred securities, considered essential holdings in a diversified portfolio, with a total fair value of $1.9 billion from Fixed maturities available for sale to Fixed maturities held to maturity.  These securities, which we have the intent and ability to hold to maturity, were transferred given the growth in our investment portfolio over the last several years, as well as continued efforts to manage the diversification of our global portfolio. The net unrealized appreciation at the date of the transfer continues to be reported in the carrying value of the transferred investments and is amortized through OCI over the remaining life of the securities using the effective interest method in a manner consistent with the amortization of any premium or discount. This transfer represents a non-cash transaction and does not impact the Consolidated Statements of Cash Flows.

b) Fixed maturities

December 31, 2015	Amortized Cost		Gross Unrealized Appreciation		Gross Unrealized Depreciation			Fair Value		OTTI Recognized in AOCI
(in millions of U.S. dollars)
Available for sale
U.S. Treasury and agency	$	2,481	$	52	$	(5	)	$	2,528	$	—
Foreign	13,190		468		(213		)	13,445		(13		)
Corporate securities	15,028		355		(454		)	14,929		(28		)
Mortgage-backed securities	9,827		183		(52		)	9,958		(1		)
States, municipalities, and political subdivisions	2,623		110		(6		)	2,727		—
	$	43,149	$	1,168	$	(730	)	$	43,587	$	(42	)
Held to maturity
U.S. Treasury and agency	$	733	$	13	$	(1	)	$	745	$	—
Foreign	763		30		(8		)	785		—
Corporate securities	3,054		57		(55		)	3,056		—
Mortgage-backed securities	1,707		38		(2		)	1,743		—
States, municipalities, and political subdivisions	2,173		52		(2		)	2,223		—
	$	8,430	$	190	$	(68	)	$	8,552	$	—

December 31, 2014	Amortized Cost		Gross Unrealized Appreciation		Gross Unrealized Depreciation			Fair Value		OTTI Recognized in AOCI
(in millions of U.S. dollars)
Available for sale
U.S. Treasury and agency	$	2,741	$	87	$	(8	)	$	2,820	$	—
Foreign	14,703		629		(90		)	15,242		—
Corporate securities	16,897		704		(170		)	17,431		(7		)
Mortgage-backed securities	10,011		304		(29		)	10,286		(1		)
States, municipalities, and political subdivisions	3,474		147		(5		)	3,616		—
	$	47,826	$	1,871	$	(302	)	$	49,395	$	(8	)
Held to maturity
U.S. Treasury and agency	$	832	$	20	$	(2	)	$	850	$	—
Foreign	916		47		—			963		—
Corporate securities	2,323		102		(2		)	2,423		—
Mortgage-backed securities	1,983		57		(1		)	2,039		—
States, municipalities, and political subdivisions	1,277		40		(3		)	1,314		—
	$	7,331	$	266	$	(8	)	$	7,589	$	—

As discussed in Note 3 d), if a credit loss is incurred on an impaired fixed maturity, an OTTI is considered to have occurred and the portion of the impairment not related to credit losses (non-credit OTTI) is recognized in OCI. Included in the “OTTI Recognized in AOCI” columns above are the cumulative amounts of non-credit OTTI recognized in OCI adjusted for subsequent sales, maturities, and redemptions. OTTI recognized in AOCI does not include the impact of subsequent changes in fair value of the related securities. In periods subsequent to a recognition of OTTI in OCI, changes in the fair value of the related fixed maturities are reflected in Unrealized appreciation (depreciation) in the consolidated statement of shareholders' equity. For the years ended December 31, 2015 and 2014, $15 million of net unrealized depreciation and $4 million of net unrealized appreciation, respectively, related to such securities is included in OCI. At December 31, 2015 and 2014, AOCI included cumulative net unrealized depreciation of $35 million and $3 million, respectively, related to securities remaining in the investment portfolio for which a non-credit OTTI was recognized.

Mortgage-backed securities (MBS) issued by U.S. government agencies are combined with all other to be announced mortgage derivatives held (refer to Note 10 c) (iv)) and are included in the category, “Mortgage-backed securities”. Approximately 81 percent and 83 percent of the total mortgage-backed securities at December 31, 2015 and 2014, respectively, are represented by investments in U.S. government agency bonds. The remainder of the mortgage exposure consists of collateralized mortgage obligations and non-government mortgage-backed securities, the majority of which provide a planned structure for principal and interest payments and carry a rating of AAA by the major credit rating agencies.

The following table presents fixed maturities by contractual maturity:

	December 31				December 31
			2015				2014
(in millions of U.S. dollars)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Available for sale
Due in 1 year or less	$	1,856	$	1,865	$	2,187	$	2,206
Due after 1 year through 5 years	14,936		15,104		15,444		15,857
Due after 5 years through 10 years	12,258		12,173		15,663		16,089
Due after 10 years	4,272		4,487		4,521		4,957
	33,322		33,629		37,815		39,109
Mortgage-backed securities	9,827		9,958		10,011		10,286
	$	43,149	$	43,587	$	47,826	$	49,395
Held to maturity
Due in 1 year or less	$	492	$	495	$	353	$	355
Due after 1 year through 5 years	2,443		2,517		2,603		2,693
Due after 5 years through 10 years	2,292		2,313		1,439		1,489
Due after 10 years	1,496		1,484		953		1,013
	6,723		6,809		5,348		5,550
Mortgage-backed securities	1,707		1,743		1,983		2,039
	$	8,430	$	8,552	$	7,331	$	7,589

Expected maturities could differ from contractual maturities because borrowers may have the right to call or prepay obligations, with or without call or prepayment penalties. 

c) Equity securities

	December 31			December 31
(in millions of U.S. dollars)	2015			2014
Cost	$	441		$	440
Gross unrealized appreciation	74			83
Gross unrealized depreciation	(18		)	(13		)
Fair value	$	497		$	510

d) Net realized gains (losses)

In accordance with guidance related to the recognition and presentation of OTTI, when an impairment related to a fixed maturity has occurred, OTTI is required to be recorded in Net income if management has the intent to sell the security or it is more likely than not that we will be required to sell the security before the recovery of its amortized cost. Further, in cases where we do not intend to sell the security and it is more likely than not that we will not be required to sell the security, we must evaluate the security to determine the portion of the impairment, if any, related to credit losses. If a credit loss is incurred, an OTTI is considered to have occurred and any portion of the OTTI related to credit losses must be reflected in Net income while the portion of OTTI related to all other factors is recognized in OCI. For fixed maturities held to maturity, OTTI recognized in OCI is accreted from AOCI to the amortized cost of the fixed maturity prospectively over the remaining term of the securities.

Each quarter, securities in an unrealized loss position (impaired securities), including fixed maturities, securities lending collateral, equity securities, and other investments, are reviewed to identify impaired securities to be specifically evaluated for a potential OTTI.

For all non-fixed maturities, OTTI is evaluated based on the following:

• the amount of time a security has been in a loss position and the magnitude of the loss position;

• the period in which cost is expected to be recovered, if at all, based on various criteria including economic conditions and other issuer-specific developments; and

• Our ability and intent to hold the security to the expected recovery period.

As a general rule, we also consider that equity securities in an unrealized loss position for twelve consecutive months are other than temporarily impaired. For mutual funds included in equity securities in our consolidated balance sheet, we employ analysis similar to fixed maturities, when applicable.

Evaluation of potential credit losses related to fixed maturities

We review each fixed maturity in an unrealized loss position to assess whether the security is a candidate for credit loss. Specifically, we consider credit rating, market price, and issuer-specific financial information, among other factors, to assess the likelihood of collection of all principal and interest as contractually due. Securities for which we determine that credit loss is likely are subjected to further analysis to estimate the credit loss recognized in Net income, if any. In general, credit loss recognized in Net income equals the difference between the security’s amortized cost and the net present value of its projected future cash flows discounted at the effective interest rate implicit in the debt security. All significant assumptions used in determining credit losses are subject to change as market conditions evolve.

U.S. Treasury and agency obligations (including agency mortgage-backed securities); foreign government obligations; and states, municipalities, and political subdivisions obligations

U.S. Treasury and agency obligations (including agency mortgage-backed securities); foreign government obligations; and states, municipalities, and political subdivisions obligations represent $100 million of gross unrealized loss at December 31, 2015. These securities were evaluated for credit loss primarily using qualitative assessments of the likelihood of credit loss considering credit rating of the issuers and level of credit enhancement, if any. We concluded that the high level of creditworthiness of the issuers coupled with credit enhancement, where applicable, supports recognizing no credit loss in net income.

Corporate securities

Projected cash flows for corporate securities (principally senior unsecured bonds) are driven primarily by assumptions regarding probability of default and also the timing and amount of recoveries associated with defaults. Chubb developed projected cash flows for corporate securities using market observable data, issuer-specific information, and credit ratings. We use historical default data by Moody’s Investors Service (Moody’s) rating category to calculate a 1-in-100 year probability of default, which results in a default assumption in excess of the historical mean default rate. Consistent with management's approach, Chubb assumed a 32 percent recovery rate (the par value of a defaulted security that will be recovered) across all rating categories rather than using Moody's historical mean recovery rate of 42 percent. We believe that use of a default assumption in excess of the historical mean is conservative in light of current market conditions.

The following table presents default assumptions by Moody's rating category (historical mean default rate provided for comparison):

Moody's Rating Category	1-in-100 Year Default Rate		Historical Mean Default Rate
Investment Grade:
Aaa-Baa	0.0-1.3%		0.0-0.3%
Below Investment Grade:
Ba	4.9	%	1.1	%
B	12.7	%	3.4	%
Caa-C	50.2	%	13.1	%

Application of the methodology and assumptions described above resulted in credit losses recognized in Net income for corporate securities of $50 million, $27 million, and $11 million for the years ended December 31, 2015, 2014, and 2013, respectively.

Mortgage-backed securities

For mortgage-backed securities, credit impairment is assessed using a cash flow model that estimates the cash flows on the underlying mortgages, using the security-specific collateral and transaction structure. The model estimates cash flows from the underlying mortgage loans and distributes those cash flows to various tranches of securities, considering the transaction structure and any subordination and credit enhancements that exist in that structure. The cash flow model incorporates actual cash flows on the mortgage-backed securities through the current period and then projects the remaining cash flows using a number of assumptions, including default rates, prepayment rates, and loss severity rates (the par value of a defaulted security that will not be recovered) on foreclosed properties.

We develop specific assumptions using market data, where available, and includes internal estimates as well as estimates published by rating agencies and other third-party sources. We project default rates by mortgage sector considering current underlying mortgage loan performance, generally assuming lower loss severity for Prime sector bonds versus ALT-A and Sub-prime bonds.

These estimates are extrapolated along a default timing curve to estimate the total lifetime pool default rate. Other assumptions used contemplate the actual collateral attributes, including geographic concentrations, rating agency loss projections, rating actions, and current market prices. If cash flow projections indicate that losses will exceed the credit enhancement for a given tranche, then we do not expect to recover our amortized cost basis, and we recognize an estimated credit loss in Net income.

For the years ended December 31, 2015 and 2014, there were no credit losses recognized in Net income for mortgage-backed securities and $1 million for 2013.

The following table presents the Net realized gains (losses) and the losses included in Net realized gains (losses) and OCI as a result of conditions which caused us to conclude the decline in fair value of certain investments was “other-than-temporary” and the change in net unrealized appreciation (depreciation) of investments: 

	Year Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Fixed maturities:
OTTI on fixed maturities, gross	$	(142	)	$	(64	)	$	(18	)
OTTI on fixed maturities recognized in OCI (pre-tax)	39			7			—
OTTI on fixed maturities, net	(103		)	(57		)	(18		)
Gross realized gains excluding OTTI	158			213			237
Gross realized losses excluding OTTI	(235		)	(133		)	(129		)
Total fixed maturities	(180		)	23			90
Equity securities:
OTTI on equity securities	(7		)	(8		)	(2		)
Gross realized gains excluding OTTI	47			22			21
Gross realized losses excluding OTTI	(11		)	(61		)	(4		)
Total equity securities	29			(47		)	15
OTTI on other investments	(2		)	(3		)	(2		)
Foreign exchange gains (losses)	(80		)	(40		)	29
Investment and embedded derivative instruments	32			(107		)	78
Fair value adjustments on insurance derivative	(203		)	(217		)	878
S&P put options and futures	(10		)	(168		)	(579		)
Other derivative instruments	(12		)	50			(2		)
Other	6			2			(3		)
Net realized gains (losses)	(420		)	(507		)	504
Change in net unrealized appreciation (depreciation) on investments:
Fixed maturities available for sale	(1,119		)	734			(1,798		)
Fixed maturities held to maturity	43			(2		)	(82		)
Equity securities	(17		)	77			(41		)
Other	(36		)	35			54
Income tax (expense) benefit	152			(167		)	408
Change in net unrealized appreciation (depreciation) on investments	(977		)	677			(1,459		)
Total net realized gains (losses) and change in net unrealized appreciation (depreciation) on investments	$	(1,397	)	$	170		$	(955	)

The following table presents a roll-forward of pre-tax credit losses related to fixed maturities for which a portion of OTTI was recognized in OCI: 

	Year Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Balance of credit losses related to securities still held – beginning of year	$	28		$	37		$	43
Additions where no OTTI was previously recorded	41			22			9
Additions where an OTTI was previously recorded	9			5			3
Reductions for securities sold during the period	(25		)	(36		)	(18		)
Balance of credit losses related to securities still held – end of year	$	53		$	28		$	37

e) Other investments

			December 31				December 31
			2015				2014
(in millions of U.S. dollars)	Fair Value		Cost		Fair Value		Cost
Investment funds	$	269	$	138	$	378	$	228
Limited partnerships	709		542		691		497
Partially-owned investment companies	1,498		1,498		1,492		1,492
Life insurance policies	222		222		205		205
Policy loans	184		184		187		187
Trading securities	284		284		290		287
Other	125		125		103		103
Total	$	3,291	$	2,993	$	3,346	$	2,999

Investment funds include one highly diversified fund investment as well as several direct funds that employ a variety of investment styles such as long/short equity and arbitrage/distressed. Included in limited partnerships and partially-owned investment companies are 67 individual limited partnerships covering a broad range of investment strategies including large cap buyouts, specialist buyouts, growth capital, distressed, mezzanine, real estate, and co-investments. The underlying portfolio consists of various public and private debt and equity securities of publicly traded and privately held companies and real estate assets.  The underlying investments across various partnerships, geographies, industries, asset types, and investment strategies provide risk diversification within the limited partnership portfolio and the overall investment portfolio.  Trading securities comprise $257 million of mutual funds supported by assets that do not qualify for separate account reporting under GAAP at December 31, 2015 compared with $261 million at December 31, 2014. Trading securities also includes assets held in rabbi trusts of $20 million of equity securities and $7 million of fixed maturities at December 31, 2015, compared with $22 million of equity securities and $7 million of fixed maturities at December 31, 2014.

f) Investments in partially-owned insurance companies

In 2015, we paid $90 million to acquire 11.3 percent of the common equity of ABR Reinsurance Capital Holdings Ltd. and warrants to acquire 0.5 percent of additional equity.  ABR Reinsurance Capital Holdings Ltd., is the parent company of ABR Reinsurance Ltd. (ABR Re), an independent reinsurance company. Through long-term arrangements, Chubb will be the sole source of reinsurance risks ceded to ABR Re, and BlackRock, Inc. will be ABR Re’s exclusive investment management service provider. As an investor, Chubb is expected to benefit from underwriting profit generated by ABR Re’s reinsuring a wide range of Chubb’s primary insurance business and the income and capital appreciation BlackRock, Inc. seeks to deliver through its investment management services. In addition, Chubb has entered into an arrangement with BlackRock, Inc. under which both Chubb and BlackRock, Inc. will be entitled to an equal share of the aggregate amount of certain fees, including underwriting and investment management performance related fees, in connection with their respective reinsurance and investment management arrangements with ABR Re.

ABR Re is a variable interest entity; however, Chubb is not the primary beneficiary and does not consolidate ABR Re because Chubb does not have the power to control and direct ABR Re’s most significant activities, including investing and underwriting. Our minority ownership interest is accounted for under the equity method of accounting. Chubb cedes premiums to ABR Re and recognizes the associated commissions. At December 31, 2015, Chubb ceded reinsurance premiums of $115 million and recognized ceded commissions of $30 million. At December 31, 2015, the amount of Reinsurance recoverable on losses and loss expenses was $82 million and the amount of ceded reinsurance premium payable included in Insurance and reinsurance balances payable in the consolidated balance sheet was $6 million.

The following table presents Investments in partially-owned insurance companies:

	December 31						December 31
	2015						2014
(in millions of U.S. dollars, except for percentages)	Carrying Value		Issued  Share Capital		Ownership Percentage		Carrying Value		Issued Share Capital		Ownership Percentage		Domicile
Huatai Group	$	430	$	624	20.0	%	$	397	$	638	20.0	%	China
Huatai Life Insurance Company	107		428		20.0	%	86		438		20.0	%	China
Freisenbruch-Meyer	9		5		40.0	%	9		5		40.0	%	Bermuda
ACE Cooperative Insurance Co. – Saudi Arabia	11		27		30.0	%	10		27		30.0	%	Saudi Arabia
Russian Reinsurance Company	2		4		23.3	%	2		4		23.3	%	Russia
ABR Reinsurance Ltd.	94		800		11.3	%	—		—		—		Bermuda
Total	$	653	$	1,888			$	504	$	1,112

Huatai Group and Huatai Life Insurance Company provide a range of P&C, life, and investment products.

g) Gross unrealized loss

At December 31, 2015, there were 8,542 fixed maturities out of a total of 25,500 fixed maturities in an unrealized loss position. The largest single unrealized loss in the fixed maturities was $5 million. There were 90 equity securities out of a total of 250 equity securities in an unrealized loss position. The largest single unrealized loss in the equity securities was $2 million. Fixed maturities in an unrealized loss position at December 31, 2015, comprised both investment grade and below investment grade securities for which fair value declined primarily due to widening credit spreads since the date of purchase.

The following tables present, for all securities in an unrealized loss position (including securities on loan), the aggregate fair value and gross unrealized loss by length of time the security has continuously been in an unrealized loss position:

	0 – 12 Months					Over 12 Months					Total
December 31, 2015	Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss
(in millions of U.S. dollars)
U.S. Treasury and agency	$	996	$	(5	)	$	153	$	(1	)	$	1,149	$	(6	)
Foreign	3,953		(148		)	436		(73		)	4,389		(221		)
Corporate securities	7,518		(371		)	738		(138		)	8,256		(509		)
Mortgage-backed securities	3,399		(42		)	516		(12		)	3,915		(54		)
States, municipalities, and political subdivisions	556		(6		)	42		(2		)	598		(8		)
Total fixed maturities	16,422		(572		)	1,885		(226		)	18,307		(798		)
Equity securities	131		(18		)	—		—			131		(18		)
Other investments	210		(11		)	—		—			210		(11		)
Total	$	16,763	$	(601	)	$	1,885	$	(226	)	$	18,648	$	(827	)

	0 – 12 Months					Over 12 Months					Total
December 31, 2014	Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss
(in millions of U.S. dollars)
U.S. Treasury and agency	$	350	$	(1	)	$	666	$	(9	)	$	1,016	$	(10	)
Foreign	2,262		(75		)	375		(15		)	2,637		(90		)
Corporate securities	4,684		(150		)	738		(22		)	5,422		(172		)
Mortgage-backed securities	704		(2		)	1,663		(28		)	2,367		(30		)
States, municipalities, and political subdivisions	458		(3		)	490		(5		)	948		(8		)
Total fixed maturities	8,458		(231		)	3,932		(79		)	12,390		(310		)
Equity securities	101		(13		)	—		—			101		(13		)
Total	$	8,559	$	(244	)	$	3,932	$	(79	)	$	12,491	$	(323	)

h) Net investment income

	Year Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Fixed maturities	$	2,157		$	2,199		$	2,093
Short-term investments	49			45			29
Equity securities	16			33			37
Other	86			94			105
Gross investment income	2,308			2,371			2,264
Investment expenses	(114		)	(119		)	(120		)
Net investment income	$	2,194		$	2,252		$	2,144

i) Restricted assets

Chubb is required to maintain assets on deposit with various regulatory authorities to support its insurance and reinsurance operations. These requirements are generally promulgated in the statutory regulations of the individual jurisdictions. The assets on deposit are available to settle insurance and reinsurance liabilities. Chubb is also required to restrict assets pledged under repurchase agreements. We also use trust funds in certain large reinsurance transactions where the trust funds are set up for the benefit of the ceding companies and generally take the place of letter of credit (LOC) requirements. We also have investments in segregated portfolios primarily to provide collateral or guarantees for LOC and derivative transactions. Included in restricted assets at December 31, 2015 and 2014, are investments, primarily fixed maturities, totaling $16.9 billion and $16.3 billion, and cash of $110 million and $117 million, respectively.

The following table presents the components of restricted assets: 

	December 31		December 31
(in millions of U.S. dollars)	2015		2014
Trust funds	$	11,862	$	10,838
Deposits with non-U.S. regulatory authorities	2,075		2,305
Assets pledged under repurchase agreements	1,459		1,431
Deposits with U.S. regulatory authorities	1,242		1,345
Other pledged assets	392		457
	$	17,030	$	16,376

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Fair value measurements

12 Months Ended

Dec. 31, 2015

Fair Value Disclosures [Abstract]

Fair value measurements

Fair value measurements

In 2015, we retrospectively adopted new accounting guidance that no longer requires investments measured at fair value using NAV to be categorized within the fair value hierarchy. Therefore, we no longer include our investments in partially-owned investment companies, investment funds, and limited partnerships within the fair value hierarchy and the Level 3 rollforward tables disclosed below. Prior year amounts within the fair value hierarchy disclosures contained in this section have been revised to conform to the current year presentation.

a) Fair value hierarchy

Fair value of financial assets and financial liabilities is estimated based on the framework established in the fair value accounting guidance. The guidance defines fair value as the price to sell an asset or transfer a liability (an exit price) in an orderly transaction between market participants and establishes a three-level valuation hierarchy based on the reliability of the inputs. The fair value hierarchy gives the highest priority to quoted prices in active markets and the lowest priority to unobservable data.

The three levels of the hierarchy are as follows:

• Level 1 – Unadjusted quoted prices for identical assets or liabilities in active markets;

• Level 2 – Includes, among other items, inputs other than quoted prices that are observable for the asset or liability such as

interest rates and yield curves, quoted prices for similar assets and liabilities in active markets, and quoted prices for identical or similar assets and liabilities in markets that are not active; and

• Level 3 – Inputs that are unobservable and reflect management’s judgments about assumptions that market participants

would use in pricing an asset or liability.

We categorize financial instruments within the valuation hierarchy at the balance sheet date based upon the lowest level of inputs that are significant to the fair value measurement. Accordingly, transfers between levels within the valuation hierarchy occur when there are significant changes to the inputs, such as increases or decreases in market activity, changes to the availability of current prices, changes to the transparency to underlying inputs, and whether there are significant variances in quoted prices. Transfers in and/or out of any level are assumed to occur at the end of the period.

We use pricing services to obtain fair value measurements for the majority of our investment securities. Based on management’s understanding of the methodologies used, these pricing services only produce an estimate of fair value if there is observable market information that would allow them to make a fair value estimate. Based on our understanding of the market inputs used by the pricing services, all applicable investments have been valued in accordance with GAAP. We do not adjust prices obtained from pricing services. The following is a description of the valuation techniques and inputs used to determine fair values for financial instruments carried at fair value, as well as the general classification of such financial instruments pursuant to the valuation hierarchy.

Fixed maturities

We use pricing services to estimate fair value measurements for the majority of our fixed maturities. The pricing services use market quotations for fixed maturities that have quoted prices in active markets; such securities are classified within Level 1. For fixed maturities other than U.S. Treasury securities that generally do not trade on a daily basis, the pricing services prepare estimates of fair value measurements using their pricing applications, which include available relevant market information, benchmark curves, benchmarking of like securities, sector groupings, and matrix pricing. Additional valuation factors that can be taken into account are nominal spreads, dollar basis, and liquidity adjustments. The pricing services evaluate each asset class based on relevant market and credit information, perceived market movements, and sector news. The market inputs used in the pricing evaluation, listed in the approximate order of priority include: benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, reference data, and industry and economic events. The extent of the use of each input is dependent on the asset class and the market conditions. Given the asset class, the priority of the use of inputs may change, or some market inputs may not be relevant. Additionally, fixed maturities valuation is more subjective when markets are less liquid due to the lack of market based inputs (i.e., stale pricing), which may increase the potential that an investment's estimated fair value is not reflective of the price at which an actual transaction would occur. The overwhelming majority of fixed maturities are classified within Level 2 because the most significant inputs used in the pricing techniques are observable. For a small number of fixed maturities, we obtain a single broker quote (typically from a market maker). Due to the disclaimers on the quotes that indicate that the price is indicative only, we include these fair value estimates in Level 3. 

Equity securities

Equity securities with active markets are classified within Level 1 as fair values are based on quoted market prices. For equity securities in markets which are less active, fair values are based on market valuations and are classified within Level 2. Equity securities for which pricing is unobservable are classified within Level 3.

Short-term investments

Short-term investments, which comprise securities due to mature within one year of the date of purchase that are traded in active markets, are classified within Level 1 as fair values are based on quoted market prices. Securities such as commercial paper and discount notes are classified within Level 2 because these securities are typically not actively traded due to their approaching maturity and, as such, their cost approximates fair value. Short-term investments for which pricing is unobservable are classified within Level 3.

Other investments

Fair values for the majority of Other investments including investments in partially-owned investment companies, investment funds, and limited partnerships are based on their respective net asset values or equivalent (NAV) and are excluded from the fair value hierarchy table below. Certain of our long-duration contracts are supported by assets that do not qualify for separate account reporting under GAAP. These assets comprise mutual funds classified within Level 1 in the valuation hierarchy on the same basis as other equity securities traded in active markets. Other investments also include equity securities classified within Level 1, and fixed maturities, classified within Level 2, held in rabbi trusts maintained by Chubb for deferred compensation plans, and are classified within the valuation hierarchy on the same basis as other equity securities and fixed maturities. Other investments for which pricing is unobservable are classified within Level 3.

Securities lending collateral

The underlying assets included in Securities lending collateral in the consolidated balance sheets are fixed maturities which are classified in the valuation hierarchy on the same basis as other fixed maturities. Excluded from the valuation hierarchy is the corresponding liability related to Chubb’s obligation to return the collateral plus interest as it is reported at contract value and not fair value in the consolidated balance sheets.

Investment derivative instruments

Actively traded investment derivative instruments, including futures, options, and forward contracts are classified within Level 1 as fair values are based on quoted market prices. The fair value of cross-currency swaps are based on market valuations and are classified within Level 2. Investment derivative instruments are recorded in either Other assets or Accounts payable, accrued expenses, and other liabilities in the consolidated balance sheets.

Other derivative instruments

We generally maintain positions in other derivative instruments including exchange-traded equity futures contracts and option contracts designed to limit exposure to a severe equity market decline, which would cause an increase in expected claims and, therefore, an increase in reserves for our guaranteed minimum death benefits (GMDB) and guaranteed living benefits (GLB) reinsurance business. Our position in exchange-traded equity futures contracts is classified within Level 1. At December 31, 2015 we held no positions in option contracts on equity market indices. The fair value of the majority of the remaining positions in other derivative instruments is based on significant observable inputs including equity security and interest rate indices. Accordingly, these are classified within Level 2. Other derivative instruments based on unobservable inputs are classified within Level 3. Other derivative instruments are recorded in either Other assets or Accounts payable, accrued expenses, and other liabilities in the consolidated balance sheets.

Separate account assets

Separate account assets represent segregated funds where investment risks are borne by the customers, except to the extent of certain guarantees made by Chubb. Separate account assets comprise mutual funds classified within Level 1 in the valuation hierarchy on the same basis as other equity securities traded in active markets. Separate account assets also include fixed maturities classified within Level 2 because the most significant inputs used in the pricing techniques are observable. Excluded from the valuation hierarchy are the corresponding liabilities as they are reported at contract value and not fair value in the consolidated balance sheets. Separate account assets are recorded in Other assets in the consolidated balance sheets.

Guaranteed living benefits

The GLB arises from life reinsurance programs covering living benefit guarantees whereby we assume the risk of guaranteed minimum income benefits (GMIB) and guaranteed minimum accumulation benefits (GMAB) associated with variable annuity contracts. GLB’s are recorded in Accounts payable, accrued expenses, and other liabilities and Future policy benefits in the consolidated balance sheets. For GLB reinsurance, Chubb estimates fair value using an internal valuation model which includes current market information and estimates of policyholder behavior. All of the treaties contain claim limits, which are factored into the valuation model. The fair value depends on a number of factors, including interest rates, equity markets, credit risk, current account value, market volatility, expected annuitization rates and other policyholder behavior, and changes in policyholder mortality.

The most significant policyholder behavior assumptions include lapse rates and the GMIB annuitization rates. Assumptions regarding lapse rates and GMIB annuitization rates differ by treaty, but the underlying methodologies to determine rates applied to each treaty are comparable.

A lapse rate is the percentage of in-force policies surrendered in a given calendar year. All else equal, as lapse rates increase, ultimate claim payments will decrease. In general, the base lapse function assumes low lapse rates (ranging from about 1 percent to 6 percent per annum) during the surrender charge period of the GMIB contract, followed by a “spike” lapse rate (ranging from about 10 percent to 30 percent per annum) in the year immediately following the surrender charge period, and then reverting to an ultimate lapse rate (generally around 10 percent per annum), typically over a 2-year period. This base rate is adjusted downward for policies with more valuable guarantees (policies with guaranteed values far in excess of their account values) by multiplying the base lapse rate by a factor ranging from 10 percent to 75 percent. Partial withdrawals and the impact of older policyholders with tax-qualified contracts (due to required minimum distributions) are also reflected in our modeling.

GMIB annuitization rate is the percentage of policies for which the policyholder will elect to annuitize using the guaranteed benefit provided under the GMIB. All else equal, as GMIB annuitization rates increase, ultimate claim payments will increase, subject to treaty claim limits. All GMIB reinsurance treaties include claim limits to protect Chubb in the event that actual annuitization behavior is significantly higher than expected. In general, Chubb assumes that GMIB annuitization rates will be higher for policies with more valuable guarantees (policies with guaranteed values far in excess of their account values). In addition, we also assume that GMIB annuitization rates are higher in the first year immediately following the waiting period (the first year the policies are eligible to annuitize using the GMIB) in comparison to all subsequent years. We do not yet have fully credible annuitization experience for all clients.

The level of annuitization assumptions at December 31, 2015 are as follows:

% of total GMIB guaranteed value	Year of GMIB eligibility	Maximum annuitization rate(s) (per year)	Maximum annuitization rates based on
68%	First year	7% - 55%	Actual Experience
	Subsequent years	5% - 27%
4%	First year	18%	Actual Experience
	Subsequent years	5%, 10%, 27%	Weighted average(1)
28%	First year	7%, 15%, 55%	Weighted average(1)
	Subsequent years	5%, 10%, 27%

⁽¹⁾ Weighted average of three different annuitization rates (with heavier weighting on credible experience from other clients when own experience is less credible)

The effect of changes in key market factors on assumed lapse and annuitization rates reflect emerging trends using data available from cedants. For treaties with limited experience, rates are established in line with data received from other ceding companies adjusted, as appropriate, with industry estimates. The model and related assumptions are regularly re-evaluated by management and enhanced, as appropriate, based upon additional experience obtained related to policyholder behavior and availability of updated information such as market conditions, market participant assumptions, and demographics of in-force annuities. Because of the significant use of unobservable inputs including policyholder behavior, GLB reinsurance is classified within Level 3.

In the fourth quarter of 2015, we completed a review of policyholder behavior related to partial withdrawals and updated our review of policyholder lapse and annuitization behavior by treaty for our variable annuity reinsurance business. Reinsured policies allow for policyholders to make periodic withdrawals from their account values without lapsing the policy. The partial withdrawal results in a reduction to the associated guaranteed value that is either equal or proportional to the amount of the reduction in account value. Based on our review of emerging behavior, we refined our assumptions around the types of partial withdrawals according to their impact on guaranteed value. This resulted in an increase to the fair value of GLB liabilities generating a realized loss of approximately $110 million. As lapse experience continued to emerge, we were able to expand our analysis and further refine our assumptions which resulted in a net increase to the fair value of GLB liabilities generating a realized loss of approximately $10 million. Because of a greater degree of reported experience related to behavior in years subsequent to the first year of annuitization eligibility, we also made several changes to our annuitization assumptions, which generally lowered the annuitization rate for most clients, while raising it for one client. The change in annuitization assumptions decreased the fair value of GLB liabilities and generated a realized gain of approximately $80 million. We will continue to monitor actual policyholder behavior (lapse, partial withdrawal, and annuitization) against our assumptions and make adjustments as appropriate in the period we receive and analyze this data. Also, during the fourth quarter of 2015, we refined certain assumptions around policyholder annuity type selection based on claim experience. This refinement decreased the fair value of GLB liabilities and generated a realized gain of approximately $45 million.

During each of the years ended December 31, 2015, 2014, and 2013, we made minor technical refinements to the internal valuation model which resulted in no material impact on the financial statements.

Financial instruments measured at fair value on a recurring basis, by valuation hierarchy 

December 31, 2015	Level 1		Level 2		Level 3		Total
(in millions of U.S. dollars)
Assets:
Fixed maturities available for sale
U.S. Treasury and agency	$	1,712	$	816	$	—	$	2,528
Foreign	—		13,388		57		13,445
Corporate securities	—		14,755		174		14,929
Mortgage-backed securities	—		9,905		53		9,958
States, municipalities, and political subdivisions	—		2,727		—		2,727
	1,712		41,591		284		43,587
Equity securities	481		—		16		497
Short-term investments	7,171		3,275		—		10,446
Other investments(1)	347		230		212		789
Securities lending collateral	—		1,046		—		1,046
Investment derivative instruments	12		—		—		12
Separate account assets	1,464		88		—		1,552
Total assets measured at fair value(1)	$	11,187	$	46,230	$	512	$	57,929
Liabilities:
Investment derivative instruments	$	13	$	—	$	—	$	13
Other derivative instruments	4		—		6		10
GLB(2)	—		—		609		609
Total liabilities measured at fair value	$	17	$	—	$	615	$	632

⁽¹⁾  Excluded from the table above are partially-owned investments, investment funds, and limited partnerships of $2,477 million and other investments of $25 million at December 31, 2015 measured using NAV. Based on new accounting guidance adopted in 2015, these investments are excluded from the hierarchy table.

⁽²⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the consolidated balance sheets. Refer to Note 5c) for additional information.

December 31, 2014	Level 1		Level 2		Level 3		Total
(in millions of U.S. dollars)
Assets:
Fixed maturities available for sale
U.S. Treasury and agency	$	1,680	$	1,140	$	—	$	2,820
Foreign	—		15,220		22		15,242
Corporate securities	—		17,244		187		17,431
Mortgage-backed securities	—		10,271		15		10,286
States, municipalities, and political subdivisions	—		3,616		—		3,616
	1,680		47,491		224		49,395
Equity securities	492		16		2		510
Short-term investments	1,183		1,139		—		2,322
Other investments(1)	370		211		204		785
Securities lending collateral	—		1,330		—		1,330
Investment derivative instruments	18		—		—		18
Other derivative instruments	—		2		—		2
Separate account assets	1,400		90		—		1,490
Total assets measured at fair value(1)	$	5,143	$	50,279	$	430	$	55,852
Liabilities:
Investment derivative instruments	$	36	$	—	$	—	$	36
Other derivative instruments	21		—		4		25
GLB(2)	—		—		406		406
Total liabilities measured at fair value	$	57	$	—	$	410	$	467

⁽¹⁾  Excluded from the table above are partially-owned investments, investment funds, and limited partnerships of$2,561 million at December 31, 2014 measured using NAV. Based on new accounting guidance adopted in 2015, these investments are excluded from the hierarchy table.

⁽²⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the consolidated balance sheets. Refer to Note 5c) for additional information.

The following table presents transfers of financial instruments between Level 1 and Level 2:

			Year Ended December 31
(in millions of U.S. dollars)	2015		2014		2013
Transfers from Level 1 to Level 2	$	—	$	189	$	19
Transfers from Level 2 to Level 1	$	—	$	—	$	—

Fair value of alternative investments

Alternative investments include investment funds, limited partnerships, and partially-owned investment companies measured at fair value using NAV as a practical expedient.

The following table presents, by investment category, the expected liquidation period, fair value, and maximum future funding commitments of alternative investments: 

		December 31				December 31
		2015				2014
(in millions of U.S. dollars)	Expected Liquidation Period of Underlying Assets	Fair Value		Maximum Future Funding Commitments		Fair Value		Maximum Future Funding Commitments
Financial	5 to 9 Years	$	300	$	105	$	282	$	145
Real Assets	3 to 7 Years	474		140		451		210
Distressed	5 to 9 Years	261		218		232		175
Private Credit	3 to 7 Years	265		209		299		190
Traditional	3 to 9 Years	895		152		895		285
Vintage	1 to 2 Years	13		—		24		5
Investment funds	Not Applicable	269		—		378		—
		$	2,477	$	824	$	2,561	$	1,010

In 2015, we redefined and regrouped certain alternative investment categories to better align with our management approach. The prior year amounts have been reclassified to conform to the current year presentation. Included in all categories in the above table except for Investment funds are investments for which Chubb will never have the contractual option to redeem but receives distributions based on the liquidation of the underlying assets. Further, for all categories except for Investment funds, Chubb does not have the ability to sell or transfer the investments without the consent from the general partner of individual funds.

Investment Category	Consists of investments in private equity funds:
Financial	targeting financial services companies such as financial institutions and insurance services worldwide
Real Assets	targeting investments related to hard physical assets such as real estate, infrastructure and natural resources
Distressed	targeting distressed corporate debt/credit and equity opportunities in the U.S.
Private Credit	targeting privately originated corporate debt investments including senior secured loans and subordinated bonds
Traditional	employing traditional private equity investment strategies such as buyout and growth equity globally
Vintage	made before 2002 and where the funds’ commitment periods had already expired

Investment funds

Chubb’s investment funds employ various investment strategies such as long/short equity and arbitrage/distressed. Included in this category are investments for which Chubb has the option to redeem at agreed upon value as described in each investment fund’s subscription agreement. Depending on the terms of the various subscription agreements, investment fund investments may be redeemed monthly, quarterly, semi-annually, or annually. If Chubb wishes to redeem an investment fund investment, it must first determine if the investment fund is still in a lock-up period (a time when Chubb cannot redeem its investment so that the investment fund manager has time to build the portfolio). If the investment fund is no longer in its lock-up period, Chubb must then notify the investment fund manager of its intention to redeem by the notification date prescribed by the subscription agreement. Subsequent to notification, the investment fund can redeem Chubb’s investment within several months of the notification. Notice periods for redemption of the investment funds range between 5 and 120 days. Chubb can redeem its investment funds without consent from the investment fund managers.

Level 3 financial instruments

The fair values of assets and liabilities measured at fair value using significant unobservable inputs (Level 3) consist of various inputs and assumptions that management makes when determining fair value. Management analyzes changes in fair value measurements classified within Level 3 by comparing pricing and returns of our investments to benchmarks, including month-over-month movements, investment credit spreads, interest rate movements, and credit quality of securities.

The following table presents the significant unobservable inputs used in the Level 3 liability valuations. Excluded from the table below are inputs used to determine the fair value of Level 3 assets which are based on single broker quotes and contain no quantitative unobservable inputs developed by management.

(in millions of U.S. dollars, except for percentages)	Fair Value at December 31, 2015		Valuation Technique	Significant Unobservable Inputs	Ranges
GLB(1)	$	609	Actuarial model	Lapse rate	1% – 30%
				Annuitization rate	0% – 55%

⁽¹⁾  Discussion of the most significant inputs used in the fair value measurement of GLB and the sensitivity of those assumptions is included within Note 4 a) Guaranteed living benefits.

The following tables present a reconciliation of the beginning and ending balances of financial instruments measured at fair value using significant unobservable inputs (Level 3): 

														Assets					Liabilities
	Available-for-Sale Debt Securities										Equity securities			Other investments			Other derivative instruments		GLB(1)
Year Ended December 31, 2015		Foreign			Corporate securities			MBS
(in millions of U.S. dollars)
Balance, beginning of year		$	22		$	187		$	15		$	2		$	204		$	4	$	406
Transfers into Level 3		34			16			—			—			—			—		—
Change in Net Unrealized Gains (Losses) included in OCI		(2		)	(1		)	—			3			(6		)	—		—
Net Realized Gains/Losses		(1		)	(4		)	—			(2		)	—			2		203
Purchases		15			52			41			13			33			—		—
Sales		(3		)	(28		)	(2		)	—			—			—		—
Settlements		(8		)	(48		)	(1		)	—			(19		)	—		—
Balance, end of year		$	57		$	174		$	53		$	16		$	212		$	6	$	609
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date		$	(1	)	$	(2	)	$	—		$	(2	)	$	—		$	2	$	203

⁽¹⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the consolidated balance sheets. Refer to Note 5c) for additional information.

	Assets																					Liabilities
	Available-for-Sale Debt Securities										Equity securities			Short-term investments			Other investments			Other derivative instruments		GLB(1)
Year ended December 31, 2014		Foreign			Corporate securities			MBS
(in millions of U.S. dollars)
Balance, beginning of year		$	44		$	166		$	8		$	4		$	7		$	196		$	—	$	193
Transfers into Level 3		10			37			—			—			—			—			2		—
Transfers out of Level 3		(34		)	(23		)	—			(2		)	(7		)	—			—		—
Change in Net Unrealized Gains (Losses) included in OCI		(1		)	(1		)	—			—			—			(1		)	—		—
Net Realized Gains/Losses		(3		)	(5		)	—			—			—			—			2		213
Purchases		15			73			8			2			—			20			—		—
Sales		(4		)	(38		)	—			(2		)	—			—			—		—
Settlements		(5		)	(22		)	(1		)	—			—			(11		)	—		—
Balance, end of year		$	22		$	187		$	15		$	2		$	—		$	204		$	4	$	406
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date		$	(4	)	$	(5	)	$	—		$	—		$	—		$	—		$	2	$	213

⁽¹⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the consolidated balance sheets. The liability for GLB reinsurance was $663 million at December 31, 2014 and $427 million at December 31, 2013, which includes a fair value derivative adjustment of $406 million and $193 million, respectively. 

	Assets																		Liabilities
	Available-for-Sale Debt Securities																		GLB(1)
Year ended December 31, 2013	Foreign			Corporate securities			MBS			Equity securities			Short term investments			Other investments
(in millions of U.S. dollars)
Balance, beginning of year	$	60		$	102		$	13		$	3		$	—		$	180		$	1,119
Transfers into Level 3	36			47			—			8			8			—			—
Transfers out of Level 3	(54		)	(31		)	—			(1		)	(2		)	—			—
Change in Net Unrealized Gains (Losses) included in OCI	—			—			—			(6		)	—			(2		)	—
Net Realized Gains/Losses	1			(2		)	—			4			—			—			(926		)
Purchases	24			75			—			2			3			29			—
Sales	(21		)	(7		)	(3		)	(6		)	(1		)	—			—
Settlements	(2		)	(18		)	(2		)	—			(1		)	(11		)	—
Balance, end of year	$	44		$	166		$	8		$	4		$	7		$	196		$	193
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date	$	—		$	(2	)	$	—		$	—		$	—		$	—		$	(926	)

⁽¹⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the consolidated balance sheets. The liability for GLB reinsurance was $427 million at December 31, 2013 and $1.4 billion at December 31, 2012, which includes a fair value derivative adjustment of $193 million and $1.1 billion, respectively. 

b) Financial instruments disclosed, but not measured, at fair value

Chubb uses various financial instruments in the normal course of its business. Our insurance contracts are excluded from fair value of financial instruments accounting guidance, and therefore, are not included in the amounts discussed below.

The carrying values of cash, other assets, other liabilities, and other financial instruments not included below approximated their fair values.

Investments in partially-owned insurance companies

Fair values for investments in partially-owned insurance companies are based on Chubb’s share of the net assets based on the financial statements provided by those companies and are excluded from the valuation hierarchy tables below.

Short- and long-term debt, repurchase agreements and trust preferred securities

Where practical, fair values for short-term debt, long-term debt, repurchase agreements and trust preferred securities are estimated using discounted cash flow calculations based principally on observable inputs including incremental borrowing rates, which reflect Chubb’s credit rating, for similar types of borrowings with maturities consistent with those remaining for the debt being valued.

The following tables present fair value, by valuation hierarchy, and carrying value of the financial instruments not measured at fair value:

December 31, 2015	Fair Value								Carrying Value
(in millions of U.S. dollars)	Level 1		Level 2		Level 3		Total
Assets:
Fixed maturities held to maturity
U.S. Treasury and agency	$	583	$	162	$	—	$	745	$	733
Foreign	—		785		—		785		763
Corporate securities	—		3,042		14		3,056		3,054
Mortgage-backed securities	—		1,743		—		1,743		1,707
States, municipalities, and political subdivisions	—		2,223		—		2,223		2,173
Total assets	$	583	$	7,955	$	14	$	8,552	$	8,430
Liabilities:
Repurchase agreements	$	—	$	1,404	$	—	$	1,404	$	1,404
Long-term debt	—		9,678		—		9,678		9,447
Trust preferred securities	—		446		—		446		309
Total liabilities	$	—	$	11,528	$	—	$	11,528	$	11,160

December 31, 2014	Fair Value								Carrying Value
(in millions of U.S. dollars)	Level 1		Level 2		Level 3		Total
Assets:
Fixed maturities held to maturity
U.S. Treasury and agency	$	659	$	191	$	—	$	850	$	832
Foreign	—		963		—		963		916
Corporate securities	—		2,408		15		2,423		2,323
Mortgage-backed securities	—		2,039		—		2,039		1,983
States, municipalities, and political subdivisions	—		1,314		—		1,314		1,277
Total assets	$	659	$	6,915	$	15	$	7,589	$	7,331
Liabilities:
Repurchase Agreements	$	—	$	1,402	$	—	$	1,402	$	1,402
Short-term debt	—		1,169		—		1,169		1,150
Long-term debt	—		3,690		—		3,690		3,357
Trust preferred securities	—		462		—		462		309
Total liabilities	$	—	$	6,723	$	—	$	6,723	$	6,218

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Reinsurance

12 Months Ended

Dec. 31, 2015

Reinsurance Disclosures [Abstract]

Reinsurance

Reinsurance

a) Consolidated reinsurance

Chubb purchases reinsurance to manage various exposures including catastrophe risks. Although reinsurance agreements contractually obligate Chubb's reinsurers to reimburse it for the agreed-upon portion of its gross paid losses, they do not discharge Chubb's primary liability. The amounts for net premiums written and net premiums earned in the consolidated statements of operations are net of reinsurance. The following table presents direct, assumed, and ceded premiums:

	Year Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Premiums written
Direct	$	19,879		$	20,069		$	19,212
Assumed		3,932			3,321			3,616
Ceded		(6,098	)		(5,591	)		(5,803	)
Net	$	17,713		$	17,799		$	17,025
Premiums earned
Direct	$	19,355		$	19,555		$	18,856
Assumed		3,676			3,336			3,479
Ceded		(5,818	)		(5,465	)		(5,722	)
Net	$	17,213		$	17,426		$	16,613

For each of the years ended December 31, 2015, 2014, and 2013, reinsurance recoveries on losses and loss expenses incurred were $3.1 billion.

b) Reinsurance recoverable on ceded reinsurance

	December 31			December 31
(in millions of U.S. dollars)	2015			2014
Reinsurance recoverable on unpaid losses and loss expenses (1)		$	10,741		$	11,307
Reinsurance recoverable on paid losses and loss expenses (1)		645			685
Net reinsurance recoverable on losses and loss expenses		$	11,386		$	11,992

⁽¹⁾  Net of a provision for uncollectible reinsurance.

We evaluate the financial condition of our reinsurers and potential reinsurers on a regular basis and also monitor concentrations of credit risk with reinsurers. The provision for uncollectible reinsurance is required principally due to the potential failure of reinsurers to indemnify Chubb, primarily because of disputes under reinsurance contracts and insolvencies. We have established provisions for amounts estimated to be uncollectible. At December 31, 2015 and 2014, we recorded a provision for uncollectible reinsurance of $328 million and $357 million, respectively.

The following tables present a listing, at December 31, 2015, of the categories of Chubb's reinsurers.

December 31, 2015	Gross Reinsurance Recoverable on Loss and Loss Expenses		Provision for Uncollectible Reinsurance		% of Gross Reinsurance Recoverable
(in millions of U.S. dollars, except for percentages)
Categories
Largest reinsurers	$	5,335	$	69	1.3	%
Other reinsurers rated A- or better	3,078		44		1.4	%
Other reinsurers with ratings lower than A- or not rated	378		68		18.0	%
Pools	347		14		4.0	%
Structured settlements	546		10		1.8	%
Captives	1,786		23		1.3	%
Other	244		100		41.0	%
Total	$	11,714	$	328	2.8	%

Largest Reinsurers
Alleghany Corp	HDI Group (Hannover Re)	Munich Re Group
Atlantic Indemnity	IRB Brasil Resseguros S.A. Group	Partner Re Group
Berkshire Hathaway Insurance Group	Lloyd's of London	Swiss Re Group

Categories of Chubb's reinsurers	Comprises:
Largest reinsurers	• All groups of reinsurers or captives where the gross recoverable exceeds one percent of Chubb's total shareholders' equity.
Other reinsurers rated A- or better	• All reinsurers rated A- or better that were not included in the largest reinsurer category.
Other reinsurers rated lower than A- or not rated	• All reinsurers rated lower than A- or not rated that were not included in the largest reinsurer category.
Pools	• Related to Chubb's voluntary pool participation and Chubb's mandatory pool participation required by law in certain states.
Structured settlements	• Annuities purchased from life insurance companies to settle claims. Since we retain ultimate liability in the event that the life company fails to pay, we reflect the amounts as both a liability and a recoverable/receivable for GAAP purposes.
Captives	• Companies established and owned by our insurance clients to assume a significant portion of their direct insurance risk from Chubb; structured to allow clients to self-insure a portion of their reinsurance risk. It generally is our policy to obtain collateral equal to expected losses. Where appropriate, exceptions are granted but only with review and approval at a senior officer level. Excludes captives included in the largest reinsurer category.
Other	• Recoverables that are in dispute or are from companies that are in supervision, rehabilitation, or liquidation.

The provision for uncollectible reinsurance is principally based on an analysis of the credit quality of the reinsurer and collateral balances. We establish the provision for uncollectible reinsurance for the Other category based on a case-by-case analysis of individual situations including the merits of the underlying matter, credit and collateral analysis, and consideration of our collection experience in similar situations.

c) Assumed life reinsurance programs involving minimum benefit guarantees under variable annuity contracts

The following table presents income and expenses relating to GMDB and GLB reinsurance. GLBs include GMIBs as well as some GMABs originating in Japan.

	Year Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
GMDB
Net premiums earned	$	61		$	71		$	77
Policy benefits and other reserve adjustments	$	34		$	50		$	73
GLB
Net premiums earned	$	121		$	138		$	149
Policy benefits and other reserve adjustments	45			36			27
Net realized gains (losses)	(203		)	(213		)	929
Gain (loss) recognized in Net income	$	(127	)	$	(111	)	$	1,051
Net cash received	$	98		$	125		$	126
Net (increase) decrease in liability	$	(225	)	$	(236	)	$	925

Net realized gains (losses) in the table above include gains (losses) related to foreign exchange and fair value adjustments on insurance derivatives and exclude gains (losses) on S&P put options and futures used to partially offset the risk in the GLB reinsurance portfolio. Refer to Note 10 for additional information.

At December 31, 2015 and 2014, the reported liability for GMDB reinsurance was $117 million and $111 million, respectively. At December 31, 2015 and 2014, the reported liability for GLB reinsurance was $888 million and $663 million, respectively, which includes a fair value derivative adjustment of $609 million and $406 million, respectively. Reported liabilities for both GMDB and GLB reinsurance are determined using internal valuation models. Such valuations require considerable judgment and are subject to significant uncertainty. The valuation of these products is subject to fluctuations arising from, among other factors, changes in interest rates, changes in equity markets, changes in credit markets, changes in the allocation of the investments underlying annuitants’ account values, and assumptions regarding future policyholder behavior. These models and the related assumptions are regularly reviewed by management and enhanced, as appropriate, based upon improvements in modeling assumptions and availability of updated information, such as market conditions and demographics of in-force annuities.

Variable Annuity Net Amount at Risk

The net amount at risk is defined as the present value of future claim payments assuming policy account values and guaranteed values are fixed at the valuation date (December 31, 2015 and 2014, respectively) and reinsurance coverage ends at the earlier of the maturity of the underlying variable annuity policy or the reinsurance treaty. In addition, the following assumptions were used:

(in millions of U.S. dollars, except for percentages)		Net amount at risk
Reinsurance covering		2015		2014		2015 Future claims discount rate	Other assumptions	Total claims at 100% mortality at December 31, 2015(1)
GMDB Risk Only		$	364	$	418	3.8% - 4.3%	No lapses or withdrawals	$	229
							Mortality according to 100% of the Annuity 2000 mortality table
GLB Risk Only		$	733	$	440	4.5% - 5.0%	No deaths, lapses or withdrawals	N/A
							Annuitization at a frequency most disadvantageous to Chubb(2)
							Claim calculated using interest rates in line with rates used to calculate reserve
Both Risks: (3)	GMDB	$	89	$	76	4.5% - 5.0%	No lapses or withdrawals	$	56
							Mortality according to 100% of the Annuity 2000 mortality table
	GLB	$	422	$	235	4.5% - 5.0%	Annuitization at a frequency most disadvantageous to Chubb(2)	$	—
							Claim calculated using interest rates in line with rates used to calculate reserve

⁽¹⁾ Takes into account all applicable reinsurance treaty claim limits.

⁽²⁾ Annuitization at a level that maximizes claims taking into account the treaty limits.

⁽³⁾ Covering both the GMDB and GLB risks on the same underlying policyholders.

The average attained age of all policyholders for all risk categories above, weighted by the guaranteed value of each reinsured policy, is approximately 69 years.

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Intangible Assets

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible assets

Intangible assets

Included in Goodwill and other intangible assets in the consolidated balance sheets at December 31, 2015 and 2014, are goodwill of $4.8 billion and $4.9 billion, respectively, and other intangible assets of $887 million and $820 million, respectively.

The following table presents a roll-forward of Goodwill by segment:

(in millions of U.S. dollars)	Insurance – North American P&C			Insurance – North American Agriculture		Insurance – Overseas General			Global Reinsurance		Life			ACE Consolidated
Balance at December 31, 2013	$	1,215		$	134	$	2,054		$	365	$	835		$	4,603
Purchase price allocation adjustment	—			—		4			—		—			4
Acquisition of Samaggi	—			—		46			—		—			46
Acquisition of Itaú Seguros	—			—		449			—		—			449
Foreign exchange revaluation and other	(4		)	—		(187		)	—		(7		)	(198		)
Balance at December 31, 2014	$	1,211		$	134	$	2,366		$	365	$	828		$	4,904
Purchase price allocation adjustment	—			—		(4		)	—		—			(4		)
Acquisition of Fireman's Fund	196			—		—			—		—			196
Foreign exchange revaluation and other	(8		)	—		(284		)	—		(8		)	(300		)
Balance at December 31, 2015	$	1,399		$	134	$	2,078		$	365	$	820		$	4,796

Included in other intangible assets at December 31, 2015 and 2014, are intangible assets subject to amortization of $789 million and $717 million, respectively, and intangible assets not subject to amortization of $98 million and $103 million, respectively. Intangible assets subject to amortization include agency relationships, renewal rights, software, client lists, and trademarks, primarily attributable to the acquisitions of Rain and Hail, Fireman's Fund, Samaggi, ABA Seguros, Itaú Seguros, and Fianzas Monterrey. The majority of the balance of intangible assets not subject to amortization relates to Lloyd's of London (Lloyd's) Syndicate 2488 (Syndicate 2488) capacity. Amortization expense related to other intangible assets amounted to $171 million, $108 million, and $95 million for the years ended December 31, 2015, 2014, and 2013, respectively. Amortization of intangible assets was higher in 2015 due primarily to the acquisitions of Fireman's Fund, Itaú Seguros, and Samaggi.

The following table presents a roll-forward of VOBA:

(in millions of U.S. dollars)	2015			2014			2013
Balance, beginning of year	$	466		$	536		$	614
Amortization expense	(42		)	(51		)	(64		)
Foreign exchange revaluation	(29		)	(19		)	(14		)
Balance, end of year	$	395		$	466		$	536

The following table presents, as of December 31, 2015, the estimated pre-tax amortization expense related to other intangible assets and VOBA for the next five years.

For the Year Ending December 31	Other intangible assets		VOBA
(in millions of U.S. dollars)
2016	$	88	$	39
2017	78		35
2018	70		32
2019	63		27
2020	58		24
Total	$	357	$	157

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Unpaid losses and loss expenses

12 Months Ended

Dec. 31, 2015

Unpaid Losses And Loss Expenses [Abstract]

Unpaid Losses and Loss Expenses

Unpaid losses and loss expenses

Chubb establishes reserves for the estimated unpaid ultimate liability for losses and loss expenses under the terms of its policies and agreements. Reserves include estimates for both claims that have been reported and for IBNR, and include estimates of expenses associated with processing and settling these claims. Reserves are recorded in Unpaid losses and loss expenses in the consolidated balance sheets. The process of establishing loss and loss expense reserves for P&C claims can be complex and is subject to considerable uncertainty as it requires the use of informed estimates and judgments. Our estimates and judgments may be revised as additional experience and other data become available and are reviewed, as new or improved methodologies are developed, or as laws change. We continually evaluate our estimate of reserves in light of developing information and in light of discussions and negotiations with our insureds. While we believe that our reserves for unpaid losses and loss expenses at December 31, 2015 are adequate, new information or trends may lead to future developments in ultimate losses and loss expenses significantly greater or less than the reserves provided. Any such revisions could result in future changes in estimates of losses or reinsurance recoverable and would be reflected in our results of operations in the period in which the estimates are changed.

The following table presents a reconciliation of unpaid losses and loss expenses:

	Years Ended December 31
(in millions of U.S. dollars)	2015				2014				2013
Gross unpaid losses and loss expenses, beginning of year		$	38,315			$	37,443			$	37,946
Reinsurance recoverable on unpaid losses(1)		(11,307		)		(10,612		)		(11,399		)
Net unpaid losses and loss expenses, beginning of year		27,008				26,831				26,547
Acquisition of subsidiaries		417				320				86
Total		27,425				27,151				26,633
Net losses and loss expenses incurred in respect of losses occurring in:
Current year		10,030				10,176				9,878
Prior years		(546		)		(527		)		(530		)
Total		9,484				9,649				9,348
Net losses and loss expenses paid in respect of losses occurring in:
Current year		4,053				3,975				3,942
Prior years		5,612				5,260				5,035
Total		9,665				9,235				8,977
Foreign currency revaluation and other		(682		)		(557		)		(173		)
Net unpaid losses and loss expenses, end of year		26,562				27,008				26,831
Reinsurance recoverable on unpaid losses(1)		10,741				11,307				10,612
Gross unpaid losses and loss expenses, end of year		$	37,303			$	38,315			$	37,443
(1) Net of provision for uncollectible reinsurance.

Net losses and loss expenses incurred includes $546 million, $527 million, and $530 million, of net favorable prior period development (PPD) in the years ended December 31, 2015, 2014, and 2013, respectively. Long-tail lines include lines such as workers’ compensation, general liability, and professional liability; while short-tail lines include lines such as most property lines, energy, personal accident, aviation, marine (including associated liability-related exposures) and agriculture. Significant prior period movements by segment, principally driven by reserve reviews completed during each respective period, are discussed in more detail below. The remaining net development for long-tail and short-tail business for each segment comprises numerous favorable and adverse movements across a number of lines and accident years, none of which is significant individually or in the aggregate.

Insurance – North American P&C

2015

Insurance – North American P&C's active operations experienced net favorable PPD of $239 million in 2015, which was the net result of several underlying favorable and adverse movements, driven by the following principal changes:

• Net favorable development of $169 million in long-tail business, primarily from:

• Net favorable development of $108 million in our management and professional liability portfolios, primarily impacting accident years 2010 and prior. Lower than expected paid and reported loss activity led to reductions in our estimates of ultimate loss for these accident years;

• Favorable development of $32 million in our auto liability excess lines and $26 million in our general liability product lines primarily impacting the 2010 accident year, resulting from lower than expected loss emergence and an increase in weighting applied to experience-based methods;

• Net favorable development of $21 million in our workers’ compensation lines with favorable development of $52 million in the 2014 accident year related to our annual assessment of multi-claimant events including industrial accidents. Consistent with prior years, we reviewed these potential exposures after the end of the accident year to allow for late reporting or identification of significant losses. Adverse development of $29 million was experienced on the 2009 and prior accident years due to a combination of claim-specific deteriorations and higher than expected loss emergence. There was also adverse development on the 2014 accident year due to revised account-level estimates, which were higher than our original aggregate expectations;

• Favorable development of $24 million in our surety business due to lower than expected claims emergence primarily in the 2013 accident year; and

• Net adverse development of $33 million in our commercial umbrella and excess portfolios, primarily impacting accident years 2010 and 2011. Higher than expected reported loss activity, combined with an increase in weighting applied to experience-based methods, led to increased provisions in accident years 2010 and 2011, which was partly offset by the recognition of favorable emergence in the 2009 and prior accident years.

• Favorable development of $70 million in short-tail business, primarily driven by favorable development of $34 million in our excess property business primarily impacting the 2013 accident year. Paid and reported loss activity was lower than expected leading to reductions in our estimate of ultimate loss.

Insurance – North American P&C's run-off operations incurred adverse PPD of $200 million in our Westchester and Brandywine run-off operations during 2015, which was the result of several adverse movements impacting accident years 1996 and prior, driven by the following principal changes:

• Adverse development of $170 million related to the completion of reserve reviews during 2015. The development primarily arose from case specific settlements and higher than expected remediation expense and defense costs for environmental claims and increases in indemnity and defense costs on a select number of modeled accounts for asbestos.  Further, we experienced higher than expected loss emergence on certain portfolios in our assumed reinsurance book and in other run-off lines; and

• Adverse development of $30 million on unallocated loss adjustment expenses due to run-off operating expenses paid and incurred during 2015.

2014

Insurance – North American P&C's active operations experienced net favorable PPD of $354 million in 2014 which was the net result of several underlying favorable and adverse movements driven by the following principal changes:

• Net favorable development of $298 million in long-tail business, primarily from:

• Favorable development of $104 million in our D&O portfolios, primarily impacting the 2009 and prior accident years. Case incurred loss emergence that was lower than expected combined with an increase in weighting applied to experience-based methods led to a reduction in the estimates of ultimate loss for those years;

• Favorable development of $55 million in our excess casualty and umbrella businesses. Resolution of a disputed matter on an individual claim led to a release of $42 million in the 2003 accident year, and lower than expected reported activity across a number of accident years drove the remaining improvement;

• Favorable development of $48 million on an older claim following recent legal developments, after which it was determined that the reserves were no longer required;

• Favorable development of $40 million in our medical risk operations, primarily impacting the 2009 and 2010 accident years. Paid and case incurred loss emergence that was lower than expected combined with an increase in weighting applied to experience-based methods led to a reduction in the estimate of ultimate loss for those years;

• Favorable development of $35 million in our financial solutions business, primarily in the 2010 and prior accident years. Net favorable development principally resulted from the recognition of lower than expected loss activity on two large excess liability transactions;

• Favorable development of $27 million in our surety business, primarily from favorable claims emergence in the 2012 accident year;

• Net adverse development of $32 million in our workers’ compensation lines, with adverse development in the 2013 accident year and mainly favorable development in accident years 2009 and 2010. Adverse development in the 2013 accident year is being driven by one large account which is experiencing higher than expected claims frequency and severity; and

• Net favorable development of $21 million in our auto liability excess lines primarily impacting the 2009 accident year. Reported activity on loss and allocated loss expenses was lower than expected based on estimates from our prior review and original pricing assumptions.

• Favorable development of $56 million in short-tail business, primarily driven by net favorable development of $20 million in our energy and technical risk property business, primarily impacting the 2012 and 2013 accident years. Across most lines, paid and reported loss activity was lower than expected.

Insurance – North American P&C's run-off operations incurred adverse PPD of $247 million in our Westchester and Brandywine run-off operations during 2014, which was a net result of adverse movements impacting accident years 1996 and prior, driven by the following principal changes:

• Adverse development of $215 million related to the completion of reserve reviews during 2014. The development primarily arose from case specific asbestos and environmental claims related to increased payment activity and the costs associated with certain case settlements in 2014. Further, we experienced higher than expected case incurred activity in our assumed reinsurance portfolio; and

• Adverse development of $32 million on unallocated loss adjustment expenses due to run-off operating expenses paid and incurred during 2014.

2013

Insurance – North American P&C active operations experienced net favorable PPD of $327 million in 2013, representing 2.1 percent of its beginning of period net unpaid loss and loss expense reserves. Insurance – North American P&C run-off operations incurred net adverse PPD of $193 million in 2013, representing 1.2 percent of its beginning of period net unpaid loss and loss expense reserves.

Insurance – North American Agriculture

Insurance – North American Agriculture experienced net favorable development of $45 million in short-tail lines in 2015, net adverse development of $34 million in 2014 and net favorable development of $13 million in 2013. Actual claim development in 2015 for the 2014 crop year for the Multiple Peril Crop Insurance (MPCI) business was favorable due to better than expected crop yield results in certain states at year-end 2014. Actual claim development in 2014 for the 2013 crop year for the MPCI business was adverse due to worse than expected crop yield results in certain states at year-end 2013. Net favorable development in 2013 was across a number of accident years, none of which was significant individually or in the aggregate.

Insurance – Overseas General

2015

Insurance – Overseas General experienced net favorable PPD of $343 million in 2015, which was the net result of several underlying favorable and adverse movements, driven by the following principal changes:

• Net favorable development of $166 million in long-tail business, primarily from:

• Net favorable development of $140 million, primarily in casualty and financial lines with favorable development of $175 million in accident years 2011 and prior, resulting from lower than expected loss emergence, and adverse development of $35 million in accident years 2012 to 2014, primarily due to large loss experience in the U.K. and Europe; and

• Favorable development of $26 million on an individual legacy liability case reserve take-down.  This release follows a legal analysis completed in 2015, based on court opinion in the year and discussions with defense counsel, which concluded that these reserves were no longer required.

• Favorable development of $177 million in short-tail business primarily from:

• Favorable development of $90 million in property, technical, energy and marine lines from specific claims and additional credibility assigned to accident years 2013 and prior favorable indications;

• Favorable development of $34 million in accident and health business primarily in accident year 2013 and 2014 across all regions and products, none of which was individually significant; and

• Favorable development of $26 million in consumer business primarily in Latin America and Asia Pacific, resulting from favorable development and additional credibility assigned to accident years 2012 and 2013.

2014

Insurance – Overseas General experienced net favorable PPD of $391 million in 2014, which was the net result of several underlying favorable and adverse movements, driven by the following principal changes:

• Net favorable development of $181 million in long-tail business, primarily from:

• Net favorable development of $102 million primarily in casualty lines with favorable development of $148 million in accident years 2010 and prior, predominantly due to favorable loss experience in European primary and excess lines, and adverse development of $46 million in accident years 2011 to 2013, predominantly due to large loss experience in the U.K. primary and excess lines;

• Favorable development of $52 million on an individual liability case reserve take-down.  This release follows discussions with defense counsel, a review of key legal briefing, and a coverage analysis, all of which was completed in the third quarter of 2014 and after which it was concluded that the reserves were no longer required; and

• Net favorable development of $27 million in financial lines with favorable development of $98 million in accident years 2010 and prior due to favorable loss experience and adverse development of $71 million in accident years 2011 to 2013. The adverse development was primarily due to large loss experience in D&O and financial institutions.

• Favorable development of $210 million in short-tail business, primarily from:

• Favorable development of $136 million across property, technical and marine lines with favorable development of $44 million in accident year 2013 due to favorable large loss experience, and favorable development of $92 million in accident years 2012 and prior due to favorable development on specific claims and an increase in weighting applied to experience-based methods;

• Favorable development of $30 million in aviation lines primarily in accident years 2010 and prior in the aviation products, airlines and airport liability lines; and

• Favorable development of $25 million in personal lines primarily in accident years 2011 to 2013 across all Latin America personal lines and Asia Pacific personal automobile lines.

2013

Insurance – Overseas General experienced net favorable PPD of $299 million in 2013, representing 3.8 percent of the segment's beginning of period net unpaid loss and loss expense reserves.

Global Reinsurance

2015

Global Reinsurance experienced net favorable PPD of $119 million in 2015, which was the net result of several underlying favorable and adverse movements, driven by the following principal changes:

• Favorable development of $54 million comprising $42 million in long-tail lines and $12 million in short-tail lines, on an individual legacy liability case reserve take-down. This release follows a legal analysis completed in 2015, based on court opinion and discussions with defense counsel, which concluded that these reserves were no longer required;

• Favorable development of $33 million in professional liability lines, including medical malpractice business, primarily in treaty years 2010 and prior reflecting favorable paid and incurred loss trends and an increase in weighting applied to experience-based methods; and

• Favorable development of $23 million in casualty lines, principally in treaty years 2009 and prior reflecting favorable paid and incurred loss trends and an increase in weighting applied to experience-based methods.

2014

Global Reinsurance experienced net favorable PPD of $63 million in 2014, which was the net result of several underlying favorable and adverse movements, driven by the following principal change:

• Net favorable development of $52 million in long-tail business, primarily from:

• Favorable development of $34 million in professional liability lines, including medical malpractice business, primarily in treaty years 2009 and prior reflecting favorable paid and incurred loss trends and an increase in weighting applied to experience-based methods; and

• Favorable development of $25 million in casualty lines, principally in treaty years 2009 and prior reflecting favorable paid and incurred loss trends and an increase in weighting applied to experience-based methods.

2013

Global Reinsurance experienced net favorable PPD of $84 million in 2013, representing 3.6 percent of the segment's beginning of period net unpaid loss and loss expense reserves.

Asbestos and environmental (A&E)

Chubb's exposure to A&E claims principally arises out of liabilities acquired when it purchased Westchester Specialty in 1998 and CIGNA's P&C business in 1999, with the larger exposure contained within the liabilities acquired in the CIGNA transaction. The following table presents a roll-forward of consolidated A&E loss reserves, allocated loss expense reserves for A&E exposures, and the provision for uncollectible paid and unpaid reinsurance recoverables:

	Asbestos						Environmental						Total
(in millions of U.S. dollars)	Gross			Net			Gross			Net			Gross			Net
Balance at December 31, 2014	$	1,500		$	892		$	199		$	149		$	1,699		$	1,041
Incurred activity	125			76			118			86			243			162			(1)
Paid activity	(274		)	(137		)	(118		)	(86		)	(392		)	(223		)
Balance at December 31, 2015	$	1,351		$	831		$	199		$	149		$	1,550		$	980

⁽¹⁾ Excludes unallocated loss expenses and the net activity reflects third-party reinsurance other than the aggregate excess of loss reinsurance provided by National Indemnity Company (NICO) to Westchester Specialty (see Westchester Specialty section below).

The A&E net loss reserves including allocated loss expense reserves and provision for uncollectible reinsurance at December 31, 2015 and 2014, of $980 million and $1.0 billion shown in the table above comprise $782 million and $837 million, respectively, of reserves held by Brandywine operations, $115 million and $119 million, respectively, of reserves held by Westchester Specialty, and $83 million and $85 million, respectively, of reserves held by other operations, mainly Insurance – Overseas General. For 2015 and 2014, the incurred activity of $162 million and $210 million, respectively, were primarily the result of our annual internal, ground-up review of A&E liabilities.

Brandywine Run-off entities – The Restructuring Plan and uncertainties relating to Chubb's ultimate Brandywine exposure

In 1996, the Pennsylvania Insurance Commissioner approved a plan to restructure INA Financial Corporation and its subsidiaries (the Restructuring) which included the division of Insurance Company of North America (INA) into two separate corporations:

(1) An active insurance company that retained the INA name and continued to write P&C business; and

(2) An inactive run-off company, now called Century Indemnity Company (Century).

As a result of the division, predominantly all A&E and certain other liabilities of INA were ascribed to Century and extinguished, as a matter of Pennsylvania law, as liabilities of INA.

As part of the Restructuring, most A&E liabilities of various U.S. affiliates of INA were reinsured to Century. Century and certain other run-off companies having A&E and other liabilities were contributed to Brandywine Holdings.

The U.S.-based ACE INA companies assumed two contractual obligations in respect of the Brandywine operations in connection with the Restructuring: a dividend retention fund obligation and a surplus maintenance obligation in the form of the excess of loss (XOL) agreement.

INA Financial Corporation established and funded a dividend retention fund (the Dividend Retention Fund) consisting of $50 million plus investment earnings. The full balance of the Dividend Retention Fund was contributed to Century as of December 31, 2002. Under the Restructuring Order, while any obligation to maintain the Dividend Retention Fund is in effect, to the extent dividends are paid by INA Holdings Corporation to its parent, INA Financial Corporation, and to the extent INA Financial Corporation then pays such dividends to INA Corporation, a portion of those dividends must be withheld to replenish the principal of the Dividend Retention Fund to $50 million. During 2011 and 2010, $35 million and $15 million, respectively, were withheld from such dividends and deposited into the Dividend Retention Fund as a result of dividends paid up to the INA Corporation. Capital contributions from the Dividend Retention Fund to Century are not required until the XOL Agreement has less than $200 million of capacity remaining on an incurred basis for statutory reporting purposes. The amount of the capital contribution shall be the lesser of the amount necessary to restore the XOL Agreement remaining capacity to $200 million or the Dividend Retention Fund balance. The Dividend Retention Fund may not be terminated without prior written approval from the Pennsylvania Insurance Commissioner.

In addition, an ACE INA insurance subsidiary provided reinsurance coverage to Century in the amount of $800 million under an XOL, triggered if the statutory capital and surplus of Century falls below $25 million or if Century lacks liquid assets with which to pay claims as they become due.

Effective December 31, 2004, ACE INA contributed $100 million to Century in exchange for a surplus note. After giving effect to the contribution and issuance of the surplus note, the statutory surplus of Century at December 31, 2015 was $25 million and approximately $335 million in statutory-basis losses have been ceded to the XOL on an inception-to-date basis. Century reports the amount ceded under the XOL in accordance with statutory accounting principles, which differ from GAAP by, among other things, allowing Century to discount its liabilities, including certain asbestos related and environmental pollution liabilities and Century's reinsurance payable to active companies. For GAAP reporting purposes, intercompany reinsurance recoverables related to the XOL are eliminated upon consolidation.

While Chubb believes it has no legal obligation to fund Century losses above the XOL limit of coverage, Chubb's consolidated results would nevertheless continue to include any losses above the limit of coverage for so long as the Brandywine companies remain consolidated subsidiaries of Chubb.

Certain active Chubbcompanies are primarily liable for asbestos, environmental, and other exposures that they have reinsured to Century. Accordingly, if Century were to become insolvent and placed into rehabilitation or liquidation, some or all of the recoverables due to these active Chubb companies from Century could become uncollectible. At December 31, 2015 and 2014, the aggregate reinsurance recoverables owed by Century to the active Chubb companies were approximately $1.2 billion and $1.1 billion, respectively. Chubb believes the active company intercompany reinsurance recoverables, which relate to direct liabilities payable over many years, are not impaired. At December 31, 2015 and 2014, Century's carried gross reserves (including reserves assumed from the active Chubb companies) were $1.9 billion and $2.1 billion, respectively. Should Century's loss reserves experience adverse development in the future and should Century be placed into rehabilitation or liquidation, the reinsurance recoverables due from Century to the active Chubb companies would be payable only after the payment in full of certain expenses and liabilities, including administrative expenses and direct policy liabilities. Thus, the intercompany reinsurance recoverables would be at risk to the extent of the shortage of assets remaining to pay these recoverables.

Westchester Specialty – impact of NICO contracts on Chubb’s run-off entities

As part of the Westchester Specialty acquisition in 1998, NICO provided a 75 percent pro-rata share of $1 billion of reinsurance protection on losses and loss adjustment expenses incurred on or before December 31, 1996, in excess of a retention of $721 million. At December 31, 2015, the remaining unused incurred limit under the Westchester NICO agreement was $466 million.

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Taxation

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

Taxation

Taxation

Under Swiss law, a resident company is subject to income tax at the federal, cantonal, and communal levels that is levied on net worldwide income. Income attributable to permanent establishments or real estate located abroad is excluded from the Swiss tax base. Chubb Limited is a holding company and, therefore, is exempt from cantonal and communal income tax. As a result, Chubb Limited is subject to Swiss income tax only at the federal level. Furthermore, participation relief (i.e., tax relief) is granted to Chubb Limited at the federal level for qualifying dividend income and capital gains related to the sale of qualifying participations (i.e., subsidiaries). It is expected that the participation relief will result in a full exemption of participation income from federal income tax. Chubb Limited is subject to an annual cantonal and communal capital tax on the taxable equity of Chubb Limited in Switzerland.

Chubb has two Swiss operating subsidiaries, an insurance company, ACE Insurance (Switzerland) Limited and a reinsurance company, ACE Reinsurance (Switzerland) Limited. Both are subject to federal, cantonal, and communal income tax and to annual cantonal and communal capital tax.

Under current Bermuda law, Chubb Limited and its Bermuda subsidiaries are not required to pay any taxes on income or capital gains. If a Bermuda law were enacted that would impose taxes on income or capital gains, Chubb Limited and the Bermuda subsidiaries have received an undertaking from the Minister of Finance in Bermuda that would exempt such companies from Bermudian taxation until March 2035.

Income from Chubb's operations at Lloyd's is subject to United Kingdom (U.K.) corporation taxes. Lloyd's is required to pay U.S. income tax on U.S. connected income (U.S. income) written by Lloyd's syndicates. Lloyd's has a closing agreement with the Internal Revenue Service (IRS) whereby the amount of tax due on this business is calculated by Lloyd's and remitted directly to the IRS. These amounts are then charged to the accounts of the Names/Corporate Members in proportion to their participation in the relevant syndicates. Chubb's Corporate Members are subject to this arrangement but, as U.K. domiciled companies, will receive U.K. corporation tax credits for any U.S. income tax incurred up to the value of the equivalent U.K. corporation income tax charge on the U.S. income.

ACE Group Holdings and its respective subsidiaries are subject to income taxes imposed by U.S. authorities and file a consolidated U.S. tax return. Starting in tax year 2014, Combined Insurance and its life subsidiary joined the ACE Group Holdings consolidated return. For tax years prior to 2014, Combined Insurance and its life subsidiary filed a separate consolidated U.S. tax return. Should ACE Group Holdings pay a dividend to Chubb, withholding taxes would apply. Currently, however, no withholding taxes are accrued with respect to such un-remitted earnings as management has no intention of remitting these earnings. Similarly, no taxes have been provided on the un-remitted earnings of certain foreign subsidiaries as management has no intention of remitting these earnings.The cumulative amount that would be subject to withholding tax, if distributed, as well as the determination of the associated tax liability are not practicable to compute; however, such amount would be material to Chubb. Certain international operations of Chubb are also subject to income taxes imposed by the jurisdictions in which they operate.

Chubb is not subject to income taxation other than as stated above.  There can be no assurance that there will not be changes in applicable laws, regulations, or treaties which might require Chubb to change the way it operates or becomes subject to taxation.

Chubb's domestic operations are in Switzerland, the jurisdiction where we are legally organized, incorporated, and registered. Domestic operations for the years ended December 31, 2015, 2014, and 2013 are not considered significant to the consolidated income before income taxes for the respective periods.

The following table presents the provision for income taxes:

	Years Ended December 31
(in millions of U.S. dollars)	2015		2014		2013
Current tax expense	$	304	$	481	$	231
Deferred tax expense	158		153		249
Provision for income taxes	$	462	$	634	$	480

The most significant jurisdictions contributing to the overall taxation of Chubb are calculated using the following rates: Switzerland 7.83 percent, Bermuda 0.0 percent, U.S. 35.0 percent, and U.K. 20.25 percent. The following table presents a reconciliation of the difference between the provision for income taxes and the expected tax provision at the Swiss statutory income tax rate:

	Years Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Expected tax provision at Swiss statutory tax rate	$	258		$	273		$	331
Permanent differences:
Taxes on earnings subject to rate other than Swiss statutory rate	193			224			124
Change to deferred taxes related to unrealized foreign exchange losses (1)	—			139			—
Tax-exempt interest and dividends received deduction, net of proration	(32		)	(33		)	(27		)
Net withholding taxes	35			33			27
Change in valuation allowance (1)	2			(20		)	4
Other	6			18			21
Total provision for income taxes	$	462		$	634		$	480

⁽¹⁾ 2014 includes a charge to deferred taxes related to non-recognition of foreign tax credits related to unrealized foreign exchange losses.

The following table presents the components of the net deferred tax assets:

	December 31		December 31
(in millions of U.S. dollars)	2015		2014
Deferred tax assets:
Loss reserve discount	$	663	$	794
Unearned premiums reserve	190		99
Foreign tax credits	969		1,103
Investments	29		9
Provision for uncollectible balances	65		81
Loss carry-forwards	72		40
Compensation related amounts	189		185
Other	65		—
Total deferred tax assets	2,242		2,311
Deferred tax liabilities:
Deferred policy acquisition costs	412		213
VOBA and other intangible assets	384		321
Un-remitted foreign earnings	827		939
Unrealized appreciation on investments	195		406
Depreciation	68		77
Other	—		43
Total deferred tax liabilities	1,886		1,999
Valuation allowance	38		17
Net deferred tax assets	$	318	$	295

The valuation allowance of $38 million at December 31, 2015, and $17 million at December 31, 2014, reflects management's assessment, based on available information, that it is more likely than not that a portion of the deferred tax assets will not be realized due to the inability of certain foreign subsidiaries to generate sufficient taxable income. Adjustments to the valuation allowance are made when there is a change in management's assessment of the amount of deferred tax assets that are realizable.

At December 31, 2015, Chubb has net operating loss carry-forwards of $325 million which, if unused, will expire starting in the year 2016, and a foreign tax credit carry-forward in the amount of $142 million which, if unused, will expire in the years 2016 through 2025.

The following table presents a reconciliation of the beginning and ending amount of gross unrecognized tax benefits:

	December 31			December 31
(in millions of U.S. dollars)	2015			2014
Balance, beginning of year	$	23		$	27
Additions based on tax provisions related to the current year	1			2
Reductions for tax positions of prior years	(7		)	—
Reductions for the lapse of the applicable statutes of limitations	(1		)	(6		)
Balance, end of year	$	16		$	23

At December 31, 2015 and 2014, the total amount of unrecognized tax benefits that would affect the effective tax rate, if recognized, were $16 million and $6 million, respectively. At December 31, 2014, $17 million of unrecognized tax benefits would not affect the effective tax rate, if recognized, as the ultimate deductibility is highly certain but there is uncertainty about the timing of such deductibility. Because of the impact of deferred tax accounting, other than interest and penalties, an unfavorable resolution of these temporary items would not affect the effective tax rate but would accelerate the payment of cash to the taxing authority to an earlier period.

Chubb recognizes accruals for interest and penalties, if any, related to unrecognized tax benefits in income tax expense in the consolidated statements of operations. For the year ended December 31, 2015, tax-related interest expense (income) and penalties reported in the consolidated statements of operations were $1 million and $(1) million for both the years ended December 31, 2014 and 2013. At December 31, 2015 and 2014, Chubb recorded $4 million and $9 million, respectively, in liabilities for tax-related interest and penalties in our consolidated balance sheets.

The IRS commenced its field examination of Chubb’s federal tax returns for 2010, 2011 and 2012 during October 2014, which were still ongoing at December 31, 2015. It is reasonably possible that over the next twelve months, the amount of unrecognized tax benefits may change resulting from the re-evaluation of unrecognized tax benefits arising from examinations of taxing authorities and the closing of tax statutes of limitations. With few exceptions, Chubb is no longer subject to state and local or non-U.S. income tax examinations for years before 2005.

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Debt

12 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Debt

Debt

	December 31		December 31
(in millions of U.S. dollars)	2015		2014		Early Redemption Option
Repurchase agreements (weighted average interest rate of 0.6% in 2015 and 0.3% in 2014)	$	1,404	$	1,402	None
Short-term debt
ACE INA senior notes:
$450 million 5.6% due May 2015	$	—	$	450	Make-whole premium plus 0.35%
$700 million 2.6% due November 2015	—		700		Make-whole premium plus 0.20%
Total short-term debt	$	—	$	1,150
Long-term debt
ACE INA senior notes:
$500 million 5.7% due February 2017	$	500	$	500	Make-whole premium plus 0.20%
$300 million 5.8% due March 2018	300		300		Make-whole premium plus 0.35%
$500 million 5.9% due June 2019	500		500		Make-whole premium plus 0.40%
$1,300 million 2.3% due November 2020	1,299		—		Make-whole premium plus 0.15%
$1,000 million 2.875% due November 2022	999		—		Make-whole premium plus 0.20%
$475 million 2.7% due March 2023	474		474		Make-whole premium plus 0.10%
$700 million 3.35% due May 2024	699		699		Make-whole premium plus 0.15%
$800 million 3.15% due March 2025	800		—		Make-whole premium plus 0.15%
$1,500 million 3.35% due May 2026	1,496		—		Make-whole premium plus 0.20%
$300 million 6.7% due May 2036	299		299		Make-whole premium plus 0.20%
$475 million 4.15% due March 2043	474		474		Make-whole premium plus 0.15%
$1,500 million 4.35% due November 2045	1,496		—		Make-whole premium plus 0.25%
ACE INA $100 million 8.875% debentures due August 2029	100		100		None
Other long-term debt (2.75% to 7.1% due December 2019 to September 2020)	11		11		None
Total long-term debt	$	9,447	$	3,357
Trust preferred securities
ACE INA capital securities due April 2030	$	309	$	309	Redemption price(1)

⁽¹⁾  Redemption price is equal to accrued and unpaid interest to the redemption date plus the greater of (i) 100 percent of the principal amount thereof, or (ii) sum of present value of scheduled payments of principal and interest on the debentures from the redemption date to April 1, 2030.

a) Repurchase agreements

Chubb has executed repurchase agreements with certain counterparties under which Chubb agreed to sell securities and repurchase them at a future date for a predetermined price.

b) Long-term debt

In March 2015, ACE INA issued $800 million of 3.15 percent senior notes due March 2025. In May 2015, ACE INA's $450 million of 5.6 percent senior notes matured and were fully paid. In November 2015, ACE INA's $700 million of 2.6 percent senior notes matured and were fully paid.

In November 2015, ACE INA issued $5.3 billion of senior notes comprising $1.3 billion of 2.3 percent senior notes due November 2020 (2020 Notes), $1.0 billion of 2.875 percent senior notes due November 2022 (2022 Notes), $1.5 billion of 3.35 percent senior notes due May 2026 (2026 Notes), and $1.5 billion of 4.35 percent senior notes due November 2045 (2045 Notes). The proceeds from the issuance of these notes were used to finance a portion of the Chubb acquisition.

ACE INA may redeem some or all of these notes at its option one month (for the 2020 Notes), two months (for the 2022 Notes), three months (for the 2026 Notes), and six months (for the 2045 Notes) prior to the respective maturity dates at a redemption price equal to 100 percent of the principal amount of the notes plus accrued and unpaid interest. The remaining terms of the senior notes are commensurate with those of our existing senior notes as described below.

All of ACE INA’s senior notes are redeemable at any time at ACE INA's option subject to the provisions described in the table above. A “make-whole premium” is the present value of the remaining principal and interest discounted at the applicable U.S. Treasury rate. The senior notes are also redeemable at par plus accrued and unpaid interest in the event of certain changes in tax law. The debentures, subject to certain exceptions, are not redeemable before maturity.

The senior notes and debentures do not have the benefit of any sinking fund. These senior unsecured notes and debentures are guaranteed on a senior basis by Chubb Limited and they rank equally with all of Chubb's other senior obligations. They also contain customary limitations on lien provisions as well as customary events of default provisions which, if breached, could result in the accelerated maturity of such senior debt.

c) ACE INA capital securities

In March 2000, ACE Capital Trust II, a Delaware statutory business trust, publicly issued $300 million of 9.7 percent Capital Securities (the Capital Securities) due to mature in April 2030. At the same time, ACE INA purchased $9.2 million of common securities of ACE Capital Trust II. The sole assets of ACE Capital Trust II consist of $309 million principal amount of 9.7 percent Junior Subordinated Deferrable Interest Debentures (the Subordinated Debentures) issued by ACE INA due to mature in April 2030.

Distributions on the Capital Securities are payable semi-annually and may be deferred for up to ten consecutive semi-annual periods (but no later than April 1, 2030). Any deferred payments would accrue interest compounded semi-annually if ACE INA defers interest on the Subordinated Debentures. Interest on the Subordinated Debentures is payable semi-annually. ACE INA may defer such interest payments (but no later than April 1, 2030), with such deferred payments accruing interest compounded semi-annually. The Capital Securities and the ACE Capital Trust II Common Securities will be redeemed upon repayment of the Subordinated Debentures.

Chubb Limited has guaranteed, on a subordinated basis, ACE INA's obligations under the Subordinated Debentures, and distributions and other payments due on the Capital Securities. These guarantees, when taken together with Chubb's obligations under expense agreements entered into with ACE Capital Trust II, provide a full and unconditional guarantee of amounts due on the Capital Securities.

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Commitments, contingencies, and guarantees

12 Months Ended

Dec. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Commitments, contingencies, and guarantees

Commitments, contingencies, and guarantees

a) Derivative instruments

Foreign currency management

As a global company, Chubb entities transact business in multiple currencies. Our policy is to generally match assets, liabilities and required capital for each individual jurisdiction in local currency, which would include the use of derivatives discussed below. We do not hedge our net asset non-U.S. dollar capital positions; however, we do consider hedging for planned cross border transactions.

Derivative instruments employed

Chubb maintains positions in derivative instruments such as futures, options, swaps, and foreign currency forward contracts for which the primary purposes are to manage duration and foreign currency exposure, yield enhancement, or to obtain an exposure to a particular financial market. Chubb also maintains positions in convertible securities that contain embedded derivatives. Investment derivative instruments are recorded in either Other assets (OA) or Accounts payable, accrued expenses, and other liabilities (AP), convertible bonds are recorded in Fixed maturities available for sale (FM AFS), and convertible equity securities are recorded in Equity securities (ES) in the consolidated balance sheets. These are the most numerous and frequent derivative transactions.

In addition, Chubb from time to time purchases to be announced mortgage-backed securities (TBAs) as part of its investing activities.

Under reinsurance programs covering GLBs, Chubb assumes the risk of GLBs, including GMIB and GMAB, associated with variable annuity contracts. The GMIB risk is triggered if, at the time the contract holder elects to convert the accumulated account value to a periodic payment stream (annuitize), the accumulated account value is not sufficient to provide a guaranteed minimum level of monthly income. The GMAB risk is triggered if, at contract maturity, the contract holder’s account value is less than a guaranteed minimum value. The GLB reinsurance product meets the definition of a derivative instrument. Benefit reserves in respect of GLBs are classified as Future policy benefits (FPB) while the fair value derivative adjustment is classified within AP. Chubb also generally maintains positions in exchange-traded equity futures contracts and options on equity market indices to limit equity exposure in the GMDB and GLB blocks of business. At December 31, 2015, we held no positions in option contracts on equity market indices.

All derivative instruments are carried at fair value with changes in fair value recorded in Net realized gains (losses) in the consolidated statements of operations. None of the derivative instruments are designated as hedges for accounting purposes.

The following table presents the balance sheet locations, fair values of derivative instruments in an asset or (liability) position, and notional values/payment provisions of our derivative instruments: 

		December 31, 2015							December 31, 2014
	Consolidated Balance Sheet Location	Fair Value					Notional Value/ Payment Provision		Fair Value					Notional Value/ Payment Provision
		Derivative Asset		Derivative (Liability)					Derivative Asset		Derivative (Liability)
(in millions of U.S. dollars)
Investment and embedded derivative instruments
Foreign currency forward contracts	OA / (AP)	$	7	$	(11	)	$	1,029	$	12	$	(7	)	$	1,329
Cross-currency swaps	OA / (AP)	—		—			95		—		—			95
Futures contracts on money market instruments	OA / (AP)	—		—			—		—		—			2,467
Options/Futures contracts on notes and bonds	OA / (AP)	5		(2		)	751		6		(29		)	1,636
Convertible securities(1)	FM AFS/ES	31		—			40		291		—			267
		$	43	$	(13	)	$	1,915	$	309	$	(36	)	$	5,794
Other derivative instruments
Futures contracts on equities(2)	OA / (AP)	$	—	$	(4	)	$	1,197	$	—	$	(21	)	$	1,384
Options on equity market indices(2)	OA / (AP)	—		—			—		2		—			250
Other	OA / (AP)	—		(6		)	15		—		(4		)	10
		$	—	$	(10	)	$	1,212	$	2	$	(25	)	$	1,644
GLB(3)	(AP) / (FPB)	$	—	$	(888	)	$	1,155	$	—	$	(663	)	$	675

⁽¹⁾ Includes fair value of embedded derivatives.

⁽²⁾  Related to GMDB and GLB blocks of business.

⁽³⁾  Includes both future policy benefits reserves and fair value derivative adjustment. Refer to Note 5c) for additional information. Note that the payment provision related to GLB is the net amount at risk. The concept of a notional value does not apply to the GLB reinsurance contracts.

At December 31, 2015 and 2014, derivative assets of $1 million and derivative liabilities of $34 million, respectively, included in the table above were subject to a master netting agreement. The remaining derivatives included in the table above were not subject to a master netting agreement. 

b) Secured borrowings

Chubb participates in a securities lending program operated by a third-party banking institution whereby certain assets are loaned to qualified borrowers and from which we earn an incremental return. At December 31, 2015 and 2014, our securities lending collateral was $1,046 million and $1,330 million, respectively, and our securities lending payable, reflecting our obligation to return the collateral plus interest, was $1,047 million and $1,331 million, respectively. The securities lending collateral can only be drawn down by Chubbin the event that the institution borrowing the securities is in default under the lending agreement. An indemnification agreement with the lending agent protects us in the event a borrower becomes insolvent or fails to return any of the securities on loan. The collateral is recorded in Securities lending collateral and the liability is recorded in Securities lending payable in the consolidated balance sheets.

The following table presents the carrying value of collateral held under securities lending agreements by investment category and remaining contractual maturity of the underlying agreements:

	Remaining contractual maturity
December 31, 2015	Overnight and Continuous
(in millions of U.S. dollars)
Collateral held under securities lending agreements:
Cash	$	424
U.S. Treasury and agency	67
Foreign	296
Corporate securities	2
Equity securities	257
	$	1,046
Gross amount of recognized liability for securities lending payable	$	1,047
Difference (1)	$	(1	)

⁽¹⁾  The carrying value of the securities lending collateral held is $1 million lower than the securities lending payable due to accrued interest recorded in the securities lending payable.

At December 31, 2015 and 2014, our repurchase agreement obligations of $1,404 million and $1,402 million, respectively, were fully collateralized. In contrast to securities lending programs, the use of cash received is not restricted for the repurchase obligations. The fair value of the underlying securities sold remains in Fixed maturities available for sale and Equity securities and the repurchase agreement obligation is recorded in Repurchase agreements in the consolidated balance sheets.

The following table presents the carrying value of collateral pledged under repurchase agreements by investment category and remaining contractual maturity of the underlying agreements:

	Remaining contractual maturity
December 31, 2015	Up to 30 Days		30 - 90 Days		Greater than 90 Days		Total
(in millions of U.S. dollars)
Collateral pledged under repurchase agreements:
Cash	$	34	$	—	$	—	$	34
U.S. Treasury and agency	6		—		231		237
Mortgage-backed securities	365		480		343		1,188
	$	405	$	480	$	574	$	1,459
Gross amount of recognized liabilities for repurchase agreements							$	1,404
Difference (1)							$	55

⁽¹⁾  Per the repurchase agreements, the amount of collateral posted is required to exceed the amount of gross liability.

Potential risks exist in our secured borrowing transactions due to market conditions and counterparty exposure.  With collateral that we pledge, there is a risk that the collateral may not be returned at the expiration of the agreement. If the counterparty fails to return the collateral, Chubb will have free use of the borrowed funds until our collateral is returned.  In addition, we may encounter the risk that Chubb may not be able to renew outstanding borrowings with a new term or with an existing counterparty due to market conditions including a decrease in demand as well as more restrictive terms from banks due to increased regulatory and capital constraints. Should this condition occur, Chubb may seek alternative borrowing sources or reduce borrowings.  Additionally, increased margins and collateral requirements due to market conditions would increase our restricted assets as we are required to provide additional collateral to support the transaction.

The following table presents net realized gains (losses) related to derivative instrument activity in the consolidated statements of operations:

	Years Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Investment and embedded derivative instruments
Foreign currency forward contracts	$	31		$	29		$	11
All other futures contracts and options	9			(118		)	61
Convertible securities(1)	(8		)	(18		)	6
Total investment and embedded derivative instruments	$	32		$	(107	)	$	78
GLB and other derivative instruments
GLB(2)	$	(203	)	$	(217	)	$	878
Futures contracts on equities(3)	(8		)	(164		)	(555		)
Options on equity market indices(3)	(2		)	(4		)	(24		)
Other	(12		)	50			(2		)
Total GLB and other derivative instruments	$	(225	)	$	(335	)	$	297
	$	(193	)	$	(442	)	$	375

⁽¹⁾  Includes embedded derivatives.

⁽²⁾  Excludes foreign exchange gains (losses) related to GLB.

⁽³⁾  Related to GMDB and GLB blocks of business. 

c) Derivative instrument objectives

(i) Foreign currency exposure management

A foreign currency forward contract (forward) is an agreement between participants to exchange specific foreign currencies at a future date. Chubb uses forwards to minimize the effect of fluctuating foreign currencies as discussed above.

(ii) Duration management and market exposure

Futures

Futures contracts give the holder the right and obligation to participate in market movements, determined by the index or underlying security on which the futures contract is based. Settlement is made daily in cash by an amount equal to the change in value of the futures contract times a multiplier that scales the size of the contract. Exchange-traded futures contracts on money market instruments, notes and bonds are used in fixed maturity portfolios to more efficiently manage duration, as substitutes for ownership of the money market instruments, bonds and notes without significantly increasing the risk in the portfolio. Investments in futures contracts may be made only to the extent that there are assets under management not otherwise committed.

Exchange-traded equity futures contracts are used to limit exposure to a severe equity market decline, which would cause an increase in expected claims and therefore, an increase in reserves for GMDB and GLB reinsurance business.

Options

An option contract conveys to the holder the right, but not the obligation, to purchase or sell a specified amount or value of an underlying security at a fixed price. Option contracts are used in the investment portfolio as protection against unexpected shifts in interest rates, which would affect the duration of the fixed maturity portfolio. By using options in the portfolio, the overall interest rate sensitivity of the portfolio can be reduced. Option contracts may also be used as an alternative to futures contracts in the synthetic strategy as described above.

Another use for option contracts is to limit exposure to a severe equity market decline, which would cause an increase in expected claims and therefore, an increase in reserves for GMDB and GLB reinsurance business.

The price of an option is influenced by the underlying security, expected volatility, time to expiration, and supply and demand.

The credit risk associated with the above derivative financial instruments relates to the potential for non-performance by counterparties. Although non-performance is not anticipated, in order to minimize the risk of loss, management monitors the creditworthiness of its counterparties and obtains collateral. The performance of exchange-traded instruments is guaranteed by the exchange on which they trade. For non-exchange-traded instruments, the counterparties are principally banks which must meet certain criteria according to our investment guidelines.

Cross-currency swaps

Cross-currency swaps are agreements under which two counterparties exchange interest payments and principal denominated in different currencies at a future date.  We use cross-currency swaps to reduce the foreign currency and interest rate risk by converting cash flows back into local currency.  We invest in foreign currency denominated investments to improve credit diversification and also to obtain better duration matching to our liabilities that is limited in the local currency market.

Other

Included within Other are derivatives intended to reduce potential losses which may arise from certain exposures in our insurance business.  The economic benefit provided by these derivatives is similar to purchased reinsurance.  For example, Chubb may enter into crop derivative contracts to protect underwriting results in the event of a significant decline in commodity prices. Also included within Other are certain life insurance products that meet the definition of a derivative instrument for accounting purposes. 

(iii) Convertible security investments

A convertible security is a debt instrument or preferred stock that can be converted into a predetermined amount of the issuer’s equity. The convertible option is an embedded derivative within the host instruments which are classified in the investment portfolio as either available for sale or as an equity security. Chubb purchases convertible securities for their total return and not specifically for the conversion feature.

(iv) TBA

By acquiring TBAs, we make a commitment to purchase a future issuance of mortgage-backed securities. For the period between purchase of the TBAs and issuance of the underlying security, we account for our position as a derivative in the consolidated financial statements. Chubb purchases TBAs both for their total return and for the flexibility they provide related to our mortgage-backed security strategy.

(v) GLB

Under the GLB program, as the assuming entity, Chubb is obligated to provide coverage until the expiration or maturity of the underlying deferred annuity contracts or the expiry of the reinsurance treaty. Premiums received under the reinsurance treaties are classified as premium. Expected losses allocated to premiums received are classified as Future policy benefits and valued similar to GMDB reinsurance. Other changes in fair value, principally arising from changes in expected losses allocated to expected future premiums, are classified as Net realized gains (losses). Fair value represents management’s estimate of an exit price and thus, includes a risk margin. We may recognize a realized loss for other changes in fair value due to adverse changes in the capital markets (e.g., declining interest rates and/or declining equity markets) and changes in actual or estimated future policyholder behavior (e.g., increased annuitization or decreased lapse rates) although we expect the business to be profitable. We believe this presentation provides the most meaningful disclosure of changes in the underlying risk within the GLB reinsurance programs for a given reporting period.

d) Concentrations of credit risk

Our investment portfolio is managed following prudent standards of diversification. Specific provisions limit the allowable holdings of a single issue and issuer. We believe that there are no significant concentrations of credit risk associated with our investments. Our three largest exposures by issuer at December 31, 2015, were JP Morgan Chase & Co., General Electric Company, and Goldman Sachs Group Inc. Our largest exposure by industry at December 31, 2015 was financial services.

We market our insurance and reinsurance worldwide primarily through insurance and reinsurance brokers. We assume a degree of credit risk associated with brokers with whom we transact business. No one broker or one insured accounted for more than 10 percent of gross written premium for the year ended December 31, 2015. For the years ended December 31, 2014 and 2013, approximately 10 percent and 11 percent, respectively, of our gross premiums written were generated from or placed by Marsh, Inc. This entity is a large, well established company and there are no indications that it is financially troubled at December 31, 2015. No other broker and no one insured or reinsured accounted for more than 10 percent of gross premiums written in the years ended December 31, 2014 and 2013.

e) Fixed maturities

At December 31, 2015, we have commitments to purchase fixed income securities of $255 million over the next several years.

f) Other investments

At December 31, 2015, included in Other investments in the consolidated balance sheet are investments in limited partnerships and partially-owned investment companies with a carrying value of $2.2 billion. In connection with these investments, we have commitments that may require funding of up to $824 million over the next several years. 

g) Letters of credit

We have a $1.5 billion unsecured operational LOC facility expiring in November 2017. We are allowed to use up to $300 million of this LOC facility as an unsecured revolving credit facility. At December 31, 2015, outstanding LOCs issued under this facility were $797 million.

This facility requires that Chubb Limited and/or certain of its subsidiaries continue to maintain certain covenants. Chubb Limited is also required to maintain a minimum consolidated net worth covenant and a maximum leverage covenant, all of which have been met at December 31, 2015.

h) Legal proceedings

Our insurance subsidiaries are subject to claims litigation involving disputed interpretations of policy coverages and, in some jurisdictions, direct actions by allegedly-injured persons seeking damages from policyholders. These lawsuits, involving claims on policies issued by our subsidiaries which are typical to the insurance industry in general and in the normal course of business, are considered in our loss and loss expense reserves. In addition to claims litigation, we are subject to lawsuits and regulatory actions in the normal course of business that do not arise from or directly relate to claims on insurance policies. This category of business litigation typically involves, among other things, allegations of underwriting errors or misconduct, employment claims, regulatory activity, or disputes arising from our business ventures. In the opinion of management, our ultimate liability for these matters could be, but we believe is not likely to be, material to our consolidated financial condition and results of operations.

i) Lease commitments

We lease office space and equipment under operating leases which expire at various dates through 2033. Rent expense was $126 million, $127 million, and $128 million for the years ended December 31, 2015, 2014, and 2013, respectively. Future minimum lease payments under the leases are expected to be as follows:

For the year ending December 31
(in millions of U.S. dollars)
2016	$	111
2017	93
2018	72
2019	54
2020	43
Thereafter	86
Total minimum future lease commitments	$	459

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Shareholders' equity

12 Months Ended

Dec. 31, 2015

Stockholders' Equity Note [Abstract]

Shareholders' equity

Shareholders’ equity

a) Common Shares

All of Chubb’s Common Shares are authorized under Swiss corporate law. Though the par value of Common Shares is stated in Swiss francs, Chubb continues to use U.S. dollars as its reporting currency for preparing the consolidated financial statements. Under Swiss corporate law, we are generally prohibited from issuing Common Shares below their par value. If there were a need to raise common equity at a time when the trading price of Chubb's Common Shares is below par value, we would need in advance to obtain shareholder approval to decrease the par value of the Common Shares.

Dividend approval

At our May 2013 annual general meeting, our shareholders approved an annual dividend for the following year of $2.04 per share, payable in four quarterly installments of $0.51 per share after the annual general meeting in the form of a distribution by way of a par value reduction. At the January 10, 2014 extraordinary general meeting, our shareholders approved a resolution to increase our quarterly dividend from $0.51 per share to $0.63 per share for the final two quarterly installments (made on January 31, 2014 and April 17, 2014) that had been earlier approved at our 2013 annual general meeting. The $0.12 per share increase for each installment was distributed from capital contribution reserves (Additional paid-in capital), a subaccount of legal reserves, and transferred to free reserves (Retained earnings) for payment, while the existing $0.51 per share was distributed by way of a par value reduction.

At our May 2014 annual general meeting, our shareholders approved an annual dividend for the following year of $2.60 per share, payable in four quarterly installments of $0.65 per share after the annual general meeting in the form of a distribution by way of a par value reduction.

At our May 2015 annual general meeting, our shareholders approved an annual dividend for the following year of up to $2.68 per share, expected to be paid in four quarterly installments of $0.67 per share after the annual general meeting by way of a distribution from capital contribution reserves, transferred to free reserves for payment. The Board of Directors (Board) will determine the record and payment dates at which the annual dividend may be paid, and is authorized to abstain from distributing a dividend in its discretion, until the date of the 2016 annual general meeting. The first three quarterly installments, each of $0.67 per share, have been distributed by the Board as expected.

Dividend distributions

Under Swiss corporate law, dividends, including distributions through a reduction in par value (par value reduction), must be stated in Swiss francs though dividend payments are made by Chubb in U.S. dollars. Dividend distributions following Chubb's redomestication to Switzerland have generally been made by way of par value reduction (under the methods approved by our shareholders at our annual general meetings) and had the effect of reducing par value per Common Share each time a dividend was distributed. We may also issue dividends without subjecting them to withholding tax by way of distributions from capital contribution reserves and payment out of free reserves. We employed this method of dividends to effect our dividend increase that was approved by our shareholders on January 10, 2014, and during portions of 2015, as noted above.

The following table presents dividend distributions per Common Share in Swiss francs (CHF) and U.S. dollars (USD):

	Years Ended December 31
		2015			2014			2013
	CHF	USD		CHF	USD		CHF	USD
Dividends - par value reduction	0.62	$	0.65	2.27	$	2.46	1.85	$	2.02
Dividends - distributed from capital contribution reserves	1.94	2.01		0.20	0.24		—	—
Total dividend distributions per common share	2.56	$	2.66	2.47	$	2.70	1.85	$	2.02

Par value reductions have been reflected as such through Common Shares in the consolidated statements of shareholders' equity and had the effect of reducing par value per Common Share to CHF 24.15 at December 31, 2015.

b) Shares issued, outstanding, authorized, and conditional

	Years Ended December 31
	2015		2014		2013
Shares issued, beginning and end of year	342,832,412		342,832,412		342,832,412
Common Shares in treasury, end of year (at cost)	(18,268,971	)	(14,172,726	)	(3,038,477	)
Shares issued and outstanding, end of year	324,563,441		328,659,686		339,793,935
Common Shares issued to employee trust
Balance, beginning of year	(9,467	)	(9,467	)	(9,467	)
Shares redeemed	3,667		—		—
Balance, end of year	(5,800	)	(9,467	)	(9,467	)

Increases in Common Shares in treasury are due to open market repurchases of Common Shares and the surrender of Common Shares to satisfy tax withholding obligations in connection with the vesting of restricted stock and the forfeiture of unvested restricted stock. Decreases in Common Shares in treasury are principally due to grants of restricted stock, exercises of stock options, and purchases under the Employee Stock Purchase Plan (ESPP).

Common Shares issued to employee trust are issued by Chubb to a rabbi trust for deferred compensation obligations as discussed in Note 11 e) below.

Authorized share capital for general purposes

The Board has shareholder-approved authority as set forth in the Articles of Association to increase for general purposes Chubb's share capital from time to time until October 22, 2017, by the issuance of up to 28,048,548 fully paid up Common Shares, with a par value equal to the par value of Chubb's Common Shares as set forth in the Articles of Association at the time of any such issuance. This authorized share capital reflects the balance remaining after the issuance of approximately 137 million shares in connection with the acquisition of The Chubb Corporation on January 14, 2016.

Conditional share capital for bonds and similar debt instruments

Chubb's share capital may be increased through the issuance of a maximum of 33,000,000 fully paid up Common Shares (with a par value of CHF 24.15 as of December 31, 2015) through the exercise of conversion and/or option or warrant rights granted in connection with bonds, notes, or similar instruments, issued or to be issued by Chubb, including convertible debt instruments.

Conditional share capital for employee benefit plans

Chubb's share capital may be increased through the issuance of a maximum of 25,410,929 fully paid up Common Shares (with a par value of CHF 24.15 as of December 31, 2015) in connection with the exercise of option rights granted to any employee of Chubb, and any consultant, director, or other person providing services to Chubb.

c) Chubb Limited securities repurchases

On November 21, 2013, the Board announced authorization of a share repurchase program of up to $2.0 billion of Chubb's Common Shares through December 31, 2014.  This $2.0 billion authorization replaced the previous authorizations which expired on December 31, 2013.

On November 24, 2014, the Board announced authorization of a share repurchase program of $1.5 billion of Chubb's Common Shares for the period January 1, 2015 through December 31, 2015 to replace the November 2013 authorization when it expired on December 31, 2014.

The following table presents repurchases of Chubb's Common Shares conducted in a series of open market transactions under the Board authorizations:

	Years Ended December 31
(in millions of U.S. dollars, except share data)	2015		2014		2013
Number of shares repurchased	6,677,663		13,982,358		3,266,531
Cost of shares repurchased	$	734	$	1,449	$	290

Chubb repurchased these Common Shares as part of an overall capital management strategy and to partially offset potential dilution from the exercise of stock options and the granting of restricted stock under share-based compensation plans. There are no outstanding repurchase authorizations at December 31, 2015.

d) General restrictions

The holders of the Common Shares are entitled to receive dividends as approved by the shareholders. Holders of Common Shares are allowed one vote per share provided that, if the controlled shares of any shareholder constitute ten percent or more of the outstanding Common Shares of Chubb, only a fraction of the vote will be allowed so as not to exceed ten percent in aggregate. Entry of acquirers of Common Shares as shareholders with voting rights in the share register may be refused if it would confer voting rights with respect to ten percent or more of the registered share capital recorded in the commercial register.

e) Deferred compensation obligation

Chubb maintains rabbi trusts for deferred compensation plans principally for employees and former directors. The shares issued by Chubb to the rabbi trusts in connection with deferrals of share compensation are classified in shareholders' equity and accounted for at historical cost in a manner similar to Common Shares in treasury. Changes in the fair value of the shares underlying the obligations are recorded in Accounts payable, accrued expenses, and other liabilities in the consolidated balance sheets and the related expense or income is recorded in Administrative expenses in the consolidated statements of operations.

The rabbi trusts also hold other assets, such as fixed maturities, equity securities, and life insurance policies. The assets of the rabbi trusts are consolidated with Chubb's assets in the consolidated balance sheets. Assets held by the trust and the associated obligations are reported at fair value in Other investments and Accounts payable, accrued expenses, and other liabilities, respectively, in the consolidated balance sheets, with changes in fair value reflected as a corresponding increase or decrease to Other (income) expense in the consolidated statements of operations. However, life insurance policies assets and obligations are reported at cash surrender value.

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Share-based compensation

12 Months Ended

Dec. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-based compensation

Share-based compensation

Chubb has share-based compensation plans which currently provide the Board the ability to grant awards of stock options, restricted stock, and restricted stock units to its employees, consultants, and members of the Board.

Chubb principally issues restricted stock grants and stock options on a graded vesting schedule. Chubb recognizes compensation cost for restricted stock and stock option grants with only service conditions that have a graded vesting schedule on a straight-line basis over the requisite service period for each separately vesting portion of the award as if the award was, in-substance, multiple awards. We incorporate an estimate of future forfeitures (6.5 percent assumption used for grants made in 2015, 2014, and 2013) in determining compensation cost for both grants of restricted stock and stock options.

During 2004, we established the ACE Limited 2004 Long-Term Incentive Plan (the 2004 LTIP), which replaced our prior incentive plans except for outstanding awards. The 2004 LTIP will continue in effect until terminated by the Board. Under the 2004 LTIP, Common Shares of Chubb are authorized to be issued pursuant to awards made as stock options, stock appreciation rights, performance shares, performance units, restricted stock, and restricted stock units.

Chubb generally grants restricted stock and restricted stock units with a 4-year vesting period, which vest in equal annual installments over the respective vesting period. The restricted stock is granted at market close price on the day of grant. Each restricted stock unit represents our obligation to deliver to the holder one Common Share upon vesting.

In May 2013, our shareholders approved an increase of eight million shares authorized to be issued under the 2004 LTIP, bringing the total shares authorized (i.e., for grant since its inception) to the sum of: (i) 38,600,000 common shares; and (ii) any shares that are represented by awards granted under the prior plans that are forfeited, expired, or are canceled after the effective date of the 2004 LTIP, without delivery of shares or which result in the forfeiture of the shares back to Chubb to the extent that such shares would have been added back to the reserve under the terms of the applicable prior plan. At December 31, 2015, a total of 4,617,796 shares remain available for future issuance under the 2004 LTIP.

Under the 2004 LTIP, 4,500,000 shares are authorized to be issued under the ESPP.  At December 31, 2015, a total of 934,243 shares remain available for issuance under the ESPP.

Chubb generally issues Common Shares for the exercise of stock options, restricted stock, and purchases under the ESPP from un-issued reserved shares (conditional share capital) and Common Shares in treasury.

The following table presents pre-tax and after-tax share-based compensation expense:

	Years Ended December 31
(in millions of U.S. dollars)	2015		2014		2013
Stock options and shares issued under ESPP:
Pre-tax	$	31	$	28	$	24
After-tax (1)	$	21	$	19	$	18
Restricted stock:
Pre-tax	$	143	$	128	$	153
After-tax	$	84	$	75	$	89

⁽¹⁾  Excludes windfall tax benefit for share-based compensation recognized as a direct adjustment to Additional paid-in capital of $26 million, $28 million and $36 million for the years ended December 31, 2015, 2014 and 2013, respectively.

Unrecognized compensation expense related to the unvested portion of Chubb's employee share-based awards was $175 million at December 31, 2015, and is expected to be recognized over a weighted-average period of approximately 1 year.

Stock options

The 2004 LTIP permits grants of both incentive and non-qualified stock options principally at an option price per share equal to the grant date fair value of Chubb's Common Shares. Stock options are generally granted with a 3-year vesting period and a 10-year term. Stock options vest in equal annual installments over the respective vesting period, which is also the requisite service period.

Chubb's 2015 share-based compensation expense includes a portion of the cost related to the 2012 through 2015 stock option grants. Stock option fair value was estimated on the grant date using the Black-Scholes option-pricing model that uses the weighted-average assumptions noted below:

	Years Ended December 31
	2015		2014		2013
Dividend yield	2.3	%	2.7	%	2.4	%
Expected volatility	21.0	%	25.2	%	27.8	%
Risk-free interest rate	1.7	%	1.7	%	1.0	%
Expected life	5.8 years		5.8 years		5.8 years

The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant. The expected life (estimated period of time from grant to exercise date) was estimated using the historical exercise behavior of employees. Expected volatility was calculated as a blend of (a) historical volatility based on daily closing prices over a period equal to the expected life assumption, (b) long-term historical volatility based on daily closing prices over the period from Chubb's initial public trading date through the most recent quarter, and (c) implied volatility derived from Chubb's publicly traded options.

The following table presents a roll-forward of Chubb's stock options:

(Intrinsic Value in millions of U.S. dollars)	Number of Options		Weighted-Average Exercise Price		Weighted-Average Fair Value		Total Intrinsic Value
Options outstanding, December 31, 2012	9,449,659		$	55.03
Granted	1,821,063		$	85.41	$	17.29
Exercised	(1,658,671	)	$	48.17			$	70
Forfeited	(115,195	)	$	72.50
Options outstanding, December 31, 2013	9,496,856		$	61.84
Granted	1,782,903		$	96.77	$	18.00
Exercised	(1,511,948	)	$	54.84			$	73
Forfeited	(143,825	)	$	84.52
Options outstanding, December 31, 2014	9,623,986		$	69.06
Granted	1,892,641		$	114.78	$	18.49
Exercised	(1,457,580	)	$	60.88			$	72
Forfeited	(205,551	)	$	100.25
Options outstanding, December 31, 2015	9,853,496		$	78.40			$	379
Options exercisable, December 31, 2015	6,424,800		$	64.45			$	337

The weighted-average remaining contractual term was 6.0 years for stock options outstanding and 4.7 years for stock options exercisable at December 31, 2015. Cash received from the exercise of stock options for the year ended December 31, 2015 was $86 million.

Restricted stock and restricted stock units

Grants of restricted stock and restricted stock units granted under the 2004 LTIP typically have a 4-year vesting period, based on a graded vesting schedule. Chubb grants performance-based restricted stock to certain executives that vest based on tangible book value (shareholders' equity less goodwill and intangible assets) per share growth compared to a defined group of peer companies. The performance-based stock awards comprise target awards which have four installments that vest annually based on the performance criteria, and premium awards, which are earned only if tangible book value per share growth over the cumulative 4-year period after the grant of the associated target awards exceeds a higher threshold compared to our peer group. Shares representing target awards are issued when the performance award is approved. They are subject to forfeiture if applicable performance criteria are not met. For awards granted prior to February 2014, shares representing premium awards were not issued at the time the target award was approved. Rather, they were subject to issuance following the 4-year performance period, if and to the extent the premium awards were earned. For awards granted in February 2014 and thereafter, premium awards have been issued subject to vesting if actually earned or forfeited if not earned at the end of the four-year performance period. Chubb also grants restricted stock awards to non-management directors which vest at the following year's annual general meeting. The restricted stock is granted at market close price on the grant date. Each restricted stock unit represents our obligation to deliver to the holder one Common Share upon vesting. Chubb's 2015 share-based compensation expense includes a portion of the cost related to the restricted stock granted in the years 2011 through 2015.

The following table presents a roll-forward of our restricted stock awards. Included in the roll-forward below are 24,945 restricted stock awards, 25,339 restricted stock awards, and 20,969 restricted stock awards that were granted to non-management directors during the years ended December 31, 2015, 2014, and 2013, respectively:

	Service-based Restricted Stock Awards				Performance-based Restricted Stock Awards
	Number of Shares		Weighted-Average Grant-Date Fair Value		Number of Shares		Weighted-Average Grant-Date Fair Value
Unvested restricted stock, December 31, 2012	4,015,732		$	59.51	239,115		$	59.94
Granted	1,347,679		$	85.61	196,806		$	89.90
Vested	(1,715,414	)	$	54.97	(236,080	)	$	75.29
Forfeited	(136,307	)	$	67.68	(3,344	)	$	69.39
Unvested restricted stock, December 31, 2013	3,511,690		$	71.42	196,497		$	71.35
Granted	1,295,734		$	97.04	374,202		$	98.31
Vested	(1,468,894	)	$	68.00	(192,009	)	$	85.39
Forfeited	(145,012	)	$	81.73	—		$	—
Unvested restricted stock, December 31, 2014	3,193,518		$	82.91	378,690		$	90.87
Granted	1,124,143		$	114.28	326,860		$	113.29
Vested	(1,299,895	)	$	79.49	(110,340	)	$	98.70
Forfeited	(192,009	)	$	95.54	—		$	—
Unvested restricted stock, December 31, 2015	2,825,757		$	96.10	595,210		$	101.73

During the years ended December 31, 2015, 2014, and 2013, Chubb awarded 293,822 restricted stock units, 300,511 restricted stock units, and 271,004 restricted stock units, respectively, to employees and officers each with a weighted-average grant date fair value per share of $114.71, $97.66, and $85.44, respectively. At December 31, 2015, there were 663,412 unvested restricted stock units.

Prior to 2009, Chubb granted restricted stock units with a 1-year vesting period to non-management directors. Delivery of Common Shares on account of these restricted stock units to non-management directors is deferred until after the date of the non-management directors' termination from the Board. At December 31, 2015, there were 145,751 deferred restricted stock units.

ESPP

The ESPP gives participating employees the right to purchase Common Shares through payroll deductions during consecutive subscription periods at a purchase price of 85 percent of the fair value of a Common Share on the exercise date (Purchase Price). Annual purchases by participants are limited to the number of whole shares that can be purchased by an amount equal to ten percent of the participant's compensation or $25,000, whichever is less. The ESPP has two six-month subscription periods each year, the first of which runs between January 1 and June 30 and the second of which runs between July 1 and December 31. The amounts collected from participants during a subscription period are used on the exercise date to purchase full shares of Common Shares. An exercise date is generally the last trading day of a subscription period. The number of shares purchased is equal to the total amount, at the exercise date, collected from the participants through payroll deductions for that subscription period, divided by the Purchase Price, rounded down to the next full share. Participants may withdraw from an offering before the exercise date and obtain a refund of amounts withheld through payroll deductions. Pursuant to the provisions of the ESPP, during the years ended December 31, 2015, 2014, and 2013, employees paid $18 million, $17 million, and $14 million to purchase 197,442 shares, 181,901 shares, and 175,437 shares, respectively.

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Pension plans

12 Months Ended

Dec. 31, 2015

Compensation and Retirement Disclosure [Abstract]

Pension plans

Pension plans

Chubb provides pension benefits to eligible employees and their dependents through various defined contribution plans and defined benefit plans sponsored by Chubb. The defined contribution plans include a capital accumulation plan (401(k)) in the U.S. At December 31, 2015, the defined benefit plans consist of various plans offered in certain jurisdictions primarily outside of the U.S. and Bermuda.

Defined contribution plans (including 401(k))

Under these plans, employees' contributions may be supplemented by Chubb matching contributions based on the level of employee contribution. These contributions are invested at the election of each employee in one or more of several investment portfolios offered by a third-party investment advisor. Expenses for these plans totaled $117 million, $119 million, and $111 million for the years ended December 31, 2015, 2014, and 2013, respectively.

Defined benefit plans

We maintain non-contributory defined benefit plans that cover certain employees, principally located in Europe, Asia, and Mexico. We also provide a defined benefit plan to certain U.S.-based employees as a result of our acquisition of Penn Millers. We account for pension benefits using the accrual method. Benefits under these plans are based on employees' years of service and compensation during final years of service. All underlying defined benefit plans are subject to periodic actuarial valuation by qualified local actuarial firms using actuarial models in calculating the pension expense and liability for each plan. We use December 31 as the measurement date for our defined benefit pension plans.

Components of the funded status of the pensions (included in Accounts payable, accrued expenses, and other liabilities in the consolidated balance sheets):

	December 31		December 31
(in millions of U.S. dollars)	2015		2014
Fair value of plan assets	$	573	$	588
Projected benefit obligation	569		594
Funded status, end of year	$	4	$	(6	)

At December 31, 2015, the defined benefit pension plan contribution for 2016 is expected to be $4 million. The estimated net actuarial loss for the defined benefit pension plans that will be amortized from AOCI into net benefit costs over the next year is $2 million.

Benefit payments were $29 million and $24 million for the years ended December 31, 2015 and 2014, respectively. Expected future payments are as follows:

For the year ending December 31
(in millions of U.S. dollars)
2016	$	20
2017	20
2018	23
2019	24
2020	24
2021–2025	126

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Other (income) expense

12 Months Ended

Dec. 31, 2015

Other Income and Expenses [Abstract]

Other (income) expense

Other (income) expense

	Year Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Equity in net (income) loss of partially-owned entities	$	(113	)	$	(231	)	$	(119	)
(Gains) losses from fair value changes in separate account assets	19			(2		)	(16		)
Federal excise and capital taxes	19			20			24
Acquisition-related costs (1)	9			15			4
Other	15			8			27
Other (income) expense	$	(51	)	$	(190	)	$	(80	)

⁽¹⁾ Excludes integration costs related to the Chubb acquisition.

Other (income) expense includes equity in net (income) loss of partially-owned entities which includes our share of net (income) loss related to partially-owned investment companies (private equity) and partially-owned insurance companies. Also included in Other (income) expense are (Gains) losses from fair value changes in separate account assets that do not qualify for separate account reporting under GAAP. The offsetting movement in the separate account liabilities is included in Policy benefits in the consolidated statements of operations. Certain federal excise and capital taxes incurred as a result of capital management initiatives are included in Other (income) expense as these are considered capital transactions and are excluded from underwriting results.

Beginning in 2015, amortization of intangible assets are excluded from Other (income) expense and disclosed separately in the consolidated statements of operations. Prior year amounts have been reclassified to conform to the current year presentation.

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Chubb integration expenses (Notes)

12 Months Ended

Dec. 31, 2015

Chubb Integration Expenses [Abstract]

Business Acquisition, Integration, Restructuring and Other Related Costs [Text Block]

Chubb integration expenses

Chubb integration expenses were $33 million for the year ended December 31, 2015 and include legal and professional fees and all external costs directly related to the integration activities of the Chubb acquisition.

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Segment information

12 Months Ended

Dec. 31, 2015

Segment Reporting [Abstract]

Segment information

Segment information

Through December 31, 2015, Chubb operated through five business segments: Insurance – North American P&C, Insurance – North American Agriculture, Insurance – Overseas General, Global Reinsurance, and Life. These segments distribute their products through various forms of brokers, agencies, and direct marketing programs. All business segments have established relationships with reinsurance intermediaries.

The Insurance – North American P&C segment comprises our operations in the U.S., Canada, and Bermuda. This segment includes our retail divisions: ACE USA (including ACE Canada), ACE Commercial Risk Services, and ACE Private Risk Services, which includes the Fireman's Fund high net worth personal lines business acquired effective April 1, 2015; our wholesale and specialty divisions: ACE Westchester and ACE Bermuda; and various run-off operations, including Brandywine. ACE USA is the North American retail operating division which provides a broad array of traditional and specialty P&C, A&H, and risk management products and services to a diverse group of North America commercial and non-commercial enterprises and consumers. ACE Commercial Risk Services addresses the insurance needs of small and micro-sized businesses in North America by delivering a broad array of specialty product solutions for targeted industries that lend themselves to technology-assisted underwriting. ACE Private Risk Services provides high-value personal lines coverages for high net worth individuals and families in North America. ACE Westchester focuses on the North American wholesale distribution of excess and surplus lines property, casualty, environmental, professional liability, inland marine products and product recall coverages. ACE Bermuda provides commercial insurance products on an excess basis mainly to a global client base targeting Fortune 1000 companies and covering exposures that are generally low in frequency and high in severity including excess liability, D&O, professional liability, property insurance, and political risk, the latter being written by Sovereign Risk Insurance Ltd., a wholly-owned managing agent. The run-off operations do not actively sell insurance products but are responsible for the management of certain existing policies and settlement of related claims.

The Insurance – North American Agriculture segment comprises our North American based businesses that provide a variety of coverages in the U.S. and Canada including crop insurance, primarily Multiple Peril Crop Insurance (MPCI) and crop-hail through Rain and Hail Insurance Services, Inc. as well as farm and ranch, and specialty P&C commercial insurance products and services through our ACE Agribusiness unit. The MPCI program is offered in conjunction with the U.S. Department of Agriculture.

The Insurance – Overseas General segment comprises ACE International, ACE Global Markets (AGM), and the international supplemental A&H business of Combined Insurance. ACE International comprises our retail commercial P&C, A&H, and personal lines businesses serving territories outside the U.S., Bermuda, and Canada. ACE International maintains a presence in every major insurance market in the world and is organized geographically along product lines that provide dedicated underwriting focus to customers. ACE International has five regions of operations: ACE Europe, ACE Asia Pacific, ACE Eurasia and Africa, ACE Far East, and ACE Latin America. ACE International writes a variety of insurance products including P&C, professional lines (directors and officers and errors and omissions), marine, energy, aviation, political risk, specialty consumer-oriented products, and A&H (principally accident and supplemental health). AGM, our London-based international specialty and excess and surplus lines business, includes Syndicate 2488, a wholly-owned ACE syndicate. AGM offers products through its parallel distribution network via ACE European Group Limited (AEGL) and Syndicate 2488. Chubb provides funds at Lloyd's to support underwriting by Syndicate 2488, which is managed by ACE Underwriting Agencies Limited. AGM uses Syndicate 2488 to underwrite P&C business on a global basis through Lloyd's worldwide licenses. AGM uses AEGL to underwrite similar classes of business through its network of U.K. and European licenses, and in the U.S. where it is eligible to write excess and surplus lines business. The reinsurance operation of AGM is included in the Global Reinsurance segment. Combined Insurance distributes a wide range of supplemental A&H products.

The Global Reinsurance segment represents Chubb's reinsurance operations comprising ACE Tempest Re Bermuda, ACE Tempest Re USA, ACE Tempest Re International, and ACE Tempest Re Canada. The Global Reinsurance segment also includes AGM's reinsurance operations. These divisions provide a broad range of traditional and specialty reinsurance products including property catastrophe, casualty, and property reinsurance coverages to a diverse array of primary P&C insurers.

The Life segment includes Chubb's international life operations (ACE Life), ACE Tempest Life Re (ACE Life Re), and the North American supplemental A&H and life business of Combined Insurance.ACE Life provides a broad portfolio of protection and savings products including whole life, endowment plans, individual term life, group term life, group medical, personal accident, credit life, universal life and unit linked contracts through multiple distribution channels primarily in emerging markets including: Egypt, Hong Kong, Indonesia, South Korea, Taiwan, Thailand, and Vietnam; also throughout Latin America, selectively in Europe, and China through a non-consolidated joint venture insurance company. ACE Life Re helps clients (ceding companies) manage mortality, morbidity, and lapse risks embedded in their books of business. ACE Life Re's core business is a Bermuda-based operation which provides reinsurance to primary life insurers, focusing on guarantees included in certain fixed and variable annuity products and also on more traditional mortality reinsurance protection. ACE Life Re's U.S.-based traditional life reinsurance operation was discontinued for new business in January 2010. Since 2007, ACE Life Re has not quoted on new opportunities in the variable annuity reinsurance marketplace. Combined Insurance distributes specialty supplemental A&H and life insurance products targeted to middle income consumers and businesses in the U.S. and Canada.

Corporate includes the results of Chubb’s non-insurance subsidiaries, including Chubb Limited, ACE Group Management and Holdings Ltd., and ACE INA Holdings, Inc.  Corporate results consist primarily of interest expense, corporate staff expenses, Chubb integration expenses and other expenses not attributable to specific reportable segments, and intersegment eliminations.

For segment reporting purposes, certain items have been presented in a different manner below than in the consolidated financial statements. Management uses underwriting income as the main measure of segment performance. Chubb calculates underwriting income by subtracting Losses and loss expenses, Policy benefits, Policy acquisition costs, and Administrative expenses from Net premiums earned. For the Insurance – North American Agriculture segment, management includes gains and losses on crop derivatives as a component of underwriting income. For 2015, underwriting income in our Insurance – North American Agriculture segment was $197 million. This amount includes $9 million of realized losses related to crop derivatives which are included in Net realized gains (losses) below. For the Life segment, management includes Net investment income and (Gains) losses from fair value changes in separate account assets that do not qualify for separate account reporting under GAAP as components of Life underwriting income. For example, for 2015, Life underwriting income of $282 million includes Net investment income of $265 millionand losses from fair value changes in separate account assets of $19 million.

The following tables present the Statement of Operations by segment:

For the Year Ended December 31, 2015 (in millions of U.S. dollars)	Insurance – North American P&C			Insurance – North American Agriculture			Insurance – Overseas General			Global Reinsurance			Life			Corporate			Chubb Consolidated
Net premiums written	$	6,907		$	1,346		$	6,634		$	828		$	1,998		$	—		$	17,713
Net premiums earned	6,582			1,364			6,471			849			1,947			—			17,213
Losses and loss expenses	4,450			1,088			3,052			290			601			3			9,484
Policy benefits	—			—			—			—			543			—			543
Policy acquisition costs	600			69			1,581			214			476			1			2,941
Administrative expenses	748			1			997			49			291			184			2,270
Underwriting income (loss)	784			206			841			296			36			(188		)	1,975
Net investment income	1,056			23			534			300			265			16			2,194
Net realized gains (losses) including OTTI	(108		)	(8		)	(38		)	(32		)	(229		)	(5		)	(420		)
Interest expense	2			—			8			5			5			280			300
Other (income) expense:
(Gains) losses from fair value changes in separate account assets	—			—			—			—			19			—			19
Other	(29		)	1			(16		)	(6		)	(39		)	19			(70		)
Amortization of intangible assets	78			30			61			—			2			—			171
Chubb integration expenses	—			—			—			—			—			33			33
Income tax expense (benefit)	316			40			232			26			30			(182		)	462
Net income (loss)	$	1,365		$	150		$	1,052		$	539		$	55		$	(327	)	$	2,834

For the Year Ended December 31, 2014 (in millions of U.S. dollars)	Insurance – North American P&C			Insurance – North American Agriculture		Insurance – Overseas General			Global Reinsurance			Life			Corporate			Chubb Consolidated
Net premiums written	$	6,263		$	1,590	$	6,999		$	935		$	2,012		$	—		$	17,799
Net premiums earned	6,107			1,526		6,805			1,026			1,962			—			17,426
Losses and loss expenses	4,086			1,351		3,189			431			589			3			9,649
Policy benefits	—			—		—			—			517			—			517
Policy acquisition costs	634			81		1,625			257			478			—			3,075
Administrative expenses	678			9		1,026			54			285			193			2,245
Underwriting income (loss)	709			85		965			284			93			(196		)	1,940
Net investment income	1,085			26		545			316			268			12			2,252
Net realized gains (losses) including OTTI	(67		)	54		(78		)	(29		)	(383		)	(4		)	(507		)
Interest expense	9			—		6			4			11			250			280
Other (income) expense:
(Gains) losses from fair value changes in separate account assets	—			—		—			—			(2		)	—			(2		)
Other	(101		)	2		(63		)	(54		)	(1		)	29			(188		)
Amortization of intangible assets	—			31		74			—			3			—			108
Income tax expense (benefit)	306			33		378			38			46			(167		)	634
Net income (loss)	$	1,513		$	99	$	1,037		$	583		$	(79	)	$	(300	)	$	2,853

For the Year Ended December 31, 2013 (in millions of U.S. dollars)	Insurance – North American P&C			Insurance – North American Agriculture		Insurance – Overseas General			Global Reinsurance			Life			Corporate			Chubb Consolidated
Net premiums written	$	5,915		$	1,627	$	6,520		$	991		$	1,972		$	—		$	17,025
Net premiums earned	5,721			1,678		6,333			976			1,905			—			16,613
Losses and loss expenses	3,776			1,524		3,062			396			582			8			9,348
Policy benefits	—			—		—			—			515			—			515
Policy acquisition costs	597			53		1,453			197			358			1			2,659
Administrative expenses	601			11		1,008			50			343			198			2,211
Underwriting income (loss)	747			90		810			333			107			(207		)	1,880
Net investment income	1,021			26		539			280			251			27			2,144
Net realized gains (losses) including OTTI	72			1		18			53			360			—			504
Interest expense	5			1		5			5			15			244			275
Other (income) expense:
(Gains) losses from fair value changes in separate account assets	—			—		—			—			(16		)	—			(16		)
Other	(58		)	—		(21		)	(19		)	10			24			(64		)
Amortization of intangible assets	—			32		60			—			3			—			95
Income tax expense (benefit)	347			20		222			36			34			(179)			480
Net income (loss)	$	1,546		$	64	$	1,101		$	644		$	672		$	(269	)	$	3,758

Underwriting assets are reviewed in total by management for purposes of decision-making. Other than goodwill and other intangible assets, Chubb does not allocate assets to its segments.

The following table presents net premiums earned for each segment by product:

(in millions of U.S. dollars)	Property & All Other		Casualty		Life, Accident & Health		Chubb Consolidated
For the Year Ended December 31, 2015
Insurance – North American P&C	$	1,931	$	4,232	$	419	$	6,582
Insurance – North American Agriculture	1,364		—		—		1,364
Insurance – Overseas General	2,868		1,537		2,066		6,471
Global Reinsurance	423		426		—		849
Life	—		—		1,947		1,947
	$	6,586	$	6,195	$	4,432	$	17,213
For the Year Ended December 31, 2014
Insurance – North American P&C	$	1,662	$	4,032	$	413	$	6,107
Insurance – North American Agriculture	1,526		—		—		1,526
Insurance – Overseas General	2,948		1,573		2,284		6,805
Global Reinsurance	551		475		—		1,026
Life	—		—		1,962		1,962
	$	6,687	$	6,080	$	4,659	$	17,426
For the Year Ended December 31, 2013
Insurance – North American P&C	$	1,489	$	3,847	$	385	$	5,721
Insurance – North American Agriculture	1,678		—		—		1,678
Insurance – Overseas General	2,672		1,479		2,182		6,333
Global Reinsurance	543		433		—		976
Life	—		—		1,905		1,905
	$	6,382	$	5,759	$	4,472	$	16,613

The following table presents net premiums earned by geographic region. Allocations have been made on the basis of location of risk:

	North America				Asia  Pacific/Far East		Latin America
Years Ended December 31			Europe(1)
2015	60	%	15	%	15	%	10	%
2014	58	%	16	%	16	%	10	%
2013	58	%	17	%	16	%	9	%

⁽¹⁾ Europe includes Eurasia and Africa region.

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Earnings per share

12 Months Ended

Dec. 31, 2015

Earnings Per Share [Abstract]

Earnings per share

Earnings per share

	Years Ended December 31
(in millions of U.S. dollars, except share and per share data)	2015		2014		2013
Numerator:
Net income	$	2,834	$	2,853	$	3,758
Denominator:
Denominator for basic earnings per share:
Weighted-average shares outstanding	325,589,361		335,609,899		340,906,490
Denominator for diluted earnings per share:
Share-based compensation plans	3,246,017		3,376,388		3,241,085
Weighted-average shares outstanding       and assumed conversions	328,835,378		338,986,287		344,147,575
Basic earnings per share	$	8.71	$	8.50	$	11.02
Diluted earnings per share	$	8.62	$	8.42	$	10.92
Potential anti-dilutive share conversions	1,601,668		1,024,788		1,031,297

Excluded from weighted-average shares outstanding and assumed conversions is the impact of securities that would have been anti-dilutive during the respective years.

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Related party transaction

12 Months Ended

Dec. 31, 2015

Related Party Transactions [Abstract]

Related party transactions

Related party transactions

Starr Technical Risks Agency, Inc. and its affiliates (Starr)

We have agency agreements with Starr, an indirect wholly-owned subsidiary of Starr International Company, Inc. whose chairman is related to a member of our senior management team. Our Board reviewed and approved our arrangements with Starr, and they also review and approve aggregate amounts paid to Starr on a regular basis. Under these agreements, we secure the ability to sell our insurance policies through Starr as one of our non-exclusive agents for writing policies, contracts, binders, or agreements of insurance or reinsurance. For the years ended December 31, 2015, 2014, and 2013 we generated $305 million, $314 million, and $307 million, respectively, in gross premiums written through these agreements. In addition, we ceded $78 million, $84 million, and $86 million to Starr as part of our reinsurance program on the underlying business for the years ended December 31, 2015, 2014, and 2013, respectively. We paid net commissions of $41 million, $43 million, and $42 million and incurred net Losses and loss expenses of $137 million, $91 million, and $70 million, respectively, for the years ended December 31, 2015, 2014, and 2013, under these agreements. 

The agency agreements also contains a profit-sharing arrangement based on loss ratios, triggered if Starr underwrites a minimum of $20 million of annual program business net written premiums on our behalf. No profit share commission has been payable yet.

Reinsurance recoverable on losses and loss expenses due from Starr was $112 million and $101 million, respectively, and the amount of ceded reinsurance premium payable included in Insurance and reinsurance balances payable in the consolidated balance sheet was $18 million and $21 million, respectively.

The ACE Foundation – Bermuda

The ACE Foundation is an unconsolidated not-for-profit organization whose primary purpose is to fund charitable causes in Bermuda. The Trustees are principally Chubb management. Chubb maintains a non-interest bearing demand note receivable from the ACE Foundation – Bermuda (Borrower), the balance of which was $24 million and $25 million, at December 31, 2015 and 2014, respectively. The receivable is included in Other assets in the consolidated balance sheets. The Borrower has used the related proceeds to finance investments in Bermuda real estate, some of which have been rented to Chubb employees at rates established by independent, professional real estate appraisers. The Borrower uses income from the investments to both repay the note and to fund charitable activities. Accordingly, we report the demand note at the lower of its principal value or the fair value of assets held by the Borrower to repay the loan, including the real estate properties.

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Statutory Financial Information

12 Months Ended

Dec. 31, 2015

Statutory Financial Information [Abstract]

Statutory financial information

Statutory financial information

Our subsidiaries file financial statements prepared in accordance with statutory accounting practices prescribed or permitted by insurance regulators. Statutory accounting differs from GAAP in the reporting of certain reinsurance contracts, investments, subsidiaries, acquisition expenses, fixed assets, deferred income taxes, and certain other items. Some jurisdictions impose complex regulatory requirements on insurance companies while other jurisdictions impose fewer requirements. In some jurisdictions, we must obtain licenses issued by governmental authorities to conduct local insurance business. These licenses may be subject to reserves and minimum capital and solvency tests. Jurisdictions may impose fines, censure, and/or criminal sanctions for violation of regulatory requirements. The 2015 amounts below are based on estimates.

Chubb's insurance and reinsurance subsidiaries are subject to insurance laws and regulations in the jurisdictions in which they operate. These regulations include restrictions that limit the amount of dividends or other distributions, such as loans or cash advances, available to shareholders without prior approval of the local insurance regulatory authorities. The amount of dividends available to be paid in 2016 without prior approval totals $4.1 billion.

The statutory capital and surplus of our insurance subsidiaries met regulatory requirements for 2015, 2014, and 2013. The minimum amounts of statutory capital and surplus necessary to satisfy regulatory requirements was $14.5 billion and $14.8 billion for December 31, 2015 and 2014, respectively. These minimum regulatory capital requirements were significantly lower than the corresponding amounts required by the rating agencies which review Chubb’s insurance and reinsurance subsidiaries.

The following tables present the combined statutory capital and surplus and statutory net income (loss) of our Property and casualty and Life subsidiaries:

	December 31
(in millions of U.S. dollars)	2015		2014
Statutory capital and surplus
Property and casualty	$	20,072	$	25,805
Life	$	1,216	$	1,463

	Year Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Statutory net income (loss)
Property and casualty	$	2,770		$	3,378		$	3,333
Life	$	(148	)	$	(248	)	$	409

The decrease in statutory capital and surplus in 2015 was primarily due to intercompany dividends declared to holding companies in anticipation of the Chubb acquisition.

Several insurance subsidiaries follow accounting practices prescribed or permitted by the jurisdiction of domicile that differ from the applicable local statutory practice. The application of prescribed or permitted accounting practices does not have a material impact on Chubb's statutory surplus and income. As prescribed by the Restructuring discussed previously in Note 7, certain of our U.S. subsidiaries discount certain A&E liabilities, which increased statutory capital and surplus by approximately $144 million and $158 million at December 31, 2015 and 2014, respectively.

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Information provided in connection with outstanding debt of subsidiaries

12 Months Ended

Dec. 31, 2015

Information Provided In Connection With Outstanding Debt Of Subsidiaries [Abstract]

Information provided in connection with outstanding debt of subsidiaries

Information provided in connection with outstanding debt of subsidiaries

The following tables present condensed consolidating financial information at December 31, 2015 and December 31, 2014, and for the years ended December 31, 2015, 2014, and 2013 for Chubb Limited (Parent Guarantor) and ACE INA Holdings, Inc. (Subsidiary Issuer). The Subsidiary Issuer is an indirect 100 percent-owned subsidiary of the Parent Guarantor. The Parent Guarantor fully and unconditionally guarantees certain of the debt of the Subsidiary Issuer. Condensed consolidating financial information of the Parent Guarantor and Subsidiary Issuer are presented on the equity method of accounting. The revenues and expenses and cash flows of the subsidiaries of the Subsidiary Issuer are presented in the Other Chubb Limited Subsidiaries column on a combined basis.

Condensed Consolidating Balance Sheet at December 31, 2015

(in millions of U.S. dollars)	Chubb Limited (Parent Guarantor)		ACE INA Holdings Inc. (Subsidiary Issuer)		Other Chubb Limited Subsidiaries		Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
Assets
Investments	$	28	$	7,839	$	58,384	$	—		$	66,251
Cash(1)	1		2		2,743		(971		)	1,775
Insurance and reinsurance balances receivable	—		—		6,075		(752		)	5,323
Reinsurance recoverable on losses and loss expenses	—		—		20,124		(8,738		)	11,386
Reinsurance recoverable on policy benefits	—		—		1,129		(942		)	187
Value of business acquired	—		—		395		—			395
Goodwill and other intangible assets	—		—		5,683		—			5,683
Investments in subsidiaries	29,612		18,386		—		(47,998		)	—
Due from subsidiaries and affiliates, net	644		1,800		—		(2,444		)	—
Other assets	8		517		14,434		(3,593		)	11,366
Total assets	$	30,293	$	28,544	$	108,967	$	(65,438	)	$	102,366
Liabilities
Unpaid losses and loss expenses	$	—	$	—	$	45,490	$	(8,187	)	$	37,303
Unearned premiums	—		—		10,243		(1,804		)	8,439
Future policy benefits	—		—		5,749		(942		)	4,807
Due to subsidiaries and affiliates, net	—		—		2,444		(2,444		)	—
Affiliated notional cash pooling programs(1)	882		89		—		(971		)	—
Repurchase agreements	—		—		1,404		—			1,404
Long-term debt	—		9,436		11		—			9,447
Trust preferred securities	—		309		—		—			309
Other liabilities	276		1,422		12,916		(3,092		)	11,522
Total liabilities	1,158		11,256		78,257		(17,440		)	73,231
Total shareholders’ equity	29,135		17,288		30,710		(47,998		)	29,135
Total liabilities and shareholders’ equity	$	30,293	$	28,544	$	108,967	$	(65,438	)	$	102,366

⁽¹⁾  Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2015, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

Condensed Consolidating Balance Sheet at December 31, 2014

(in millions of U.S. dollars)	Chubb Limited (Parent Guarantor)		ACE INA Holdings Inc. (Subsidiary Issuer)		Other Chubb Limited Subsidiaries		Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
Assets
Investments	$	30	$	225	$	62,649	$	—		$	62,904
Cash(1)	—		1		1,209		(555		)	655
Insurance and reinsurance balances receivable	—		—		6,178		(752		)	5,426
Reinsurance recoverable on losses and loss expenses	—		—		20,992		(9,000		)	11,992
Reinsurance recoverable on policy benefits	—		—		1,194		(977		)	217
Value of business acquired	—		—		466		—			466
Goodwill and other intangible assets	—		—		5,724		—			5,724
Investments in subsidiaries	29,497		18,762		—		(48,259		)	—
Due from subsidiaries and affiliates, net	583		—		—		(583		)	—
Other assets	4		295		14,196		(3,631		)	10,864
Total assets	$	30,114	$	19,283	$	112,608	$	(63,757	)	$	98,248
Liabilities
Unpaid losses and loss expenses	$	—	$	—	$	46,770	$	(8,455	)	$	38,315
Unearned premiums	—		—		9,958		(1,736		)	8,222
Future policy benefits	—		—		5,731		(977		)	4,754
Due to subsidiaries and affiliates, net	—		422		161		(583		)	—
Affiliated notional cash pooling programs(1)	246		309		—		(555		)	—
Repurchase agreements	—		—		1,402		—			1,402
Short-term debt	—		1,150		—		—			1,150
Long-term debt	—		3,345		12		—			3,357
Trust preferred securities	—		309		—		—			309
Other liabilities	281		1,404		12,659		(3,192		)	11,152
Total liabilities	527		6,939		76,693		(15,498		)	68,661
Total shareholders’ equity	29,587		12,344		35,915		(48,259		)	29,587
Total liabilities and shareholders’ equity	$	30,114	$	19,283	$	112,608	$	(63,757	)	$	98,248

⁽¹⁾  Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2014, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

Condensed Consolidating Statements of Operations and Comprehensive Income

For the Year Ended December 31, 2015	Chubb Limited (Parent Guarantor)			ACE INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net premiums written	$	—		$	—		$	17,713		$	—		$	17,713
Net premiums earned	—			—			17,213			—			17,213
Net investment income	3			4			2,187			—			2,194
Equity in earnings of subsidiaries	2,673			1,038			—			(3,711		)	—
Net realized gains (losses) including OTTI	—			(9		)	(411		)	—			(420		)
Losses and loss expenses	—			—			9,484			—			9,484
Policy benefits	—			—			543			—			543
Policy acquisition costs and administrative expenses	63			28			5,120			—			5,211
Interest (income) expense	(32		)	302			30			—			300
Other (income) expense	(208		)	(4		)	161			—			(51		)
Amortization of intangible assets	—			—			171			—			171
Chubb integration expenses	3			29			1			—			33
Income tax expense (benefit)	16			(349		)	795			—			462
Net income	$	2,834		$	1,027		$	2,684		$	(3,711	)	$	2,834
Comprehensive income (loss)	$	908		$	(192	)	$	757		$	(565	)	$	908

Condensed Consolidating Statements of Operations and Comprehensive Income

For the Year Ended December 31, 2014	Chubb Limited (Parent Guarantor)			ACE INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net premiums written	$	—		$	—		$	17,799		$	—		$	17,799
Net premiums earned	—			—			17,426			—			17,426
Net investment income	2			2			2,248			—			2,252
Equity in earnings of subsidiaries	2,707			791			—			(3,498		)	—
Net realized gains (losses) including OTTI	—			53			(560		)	—			(507		)
Losses and loss expenses	—			—			9,649			—			9,649
Policy benefits	—			—			517			—			517
Policy acquisition costs and administrative expenses	78			26			5,216			—			5,320
Interest (income) expense	(35		)	277			38			—			280
Other (income) expense	(201		)	27			(16		)	—			(190		)
Amortization of intangible assets	—			—			108			—			108
Income tax expense (benefit)	14			(94		)	714			—			634
Net income	$	2,853		$	610		$	2,888		$	(3,498	)	$	2,853
Comprehensive income	$	2,892		$	583		$	2,926		$	(3,509	)	$	2,892

Condensed Consolidating Statements of Operations and Comprehensive Income

For the Year Ended December 31, 2013	Chubb Limited (Parent Guarantor)			ACE INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries		Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net premiums written	$	—		$	—		$	17,025	$	—		$	17,025
Net premiums earned	—			—			16,613		—			16,613
Net investment income	2			3			2,139		—			2,144
Equity in earnings of subsidiaries	3,580			942			—		(4,522		)	—
Net realized gains (losses) including OTTI	—			(2		)	506		—			504
Losses and loss expenses	—			—			9,348		—			9,348
Policy benefits	—			—			515		—			515
Policy acquisition costs and administrative expenses	60			19			4,791		—			4,870
Interest (income) expense	(32		)	270			37		—			275
Other (income) expense	(221		)	27			114		—			(80		)
Amortization of intangible assets	—			—			95		—			95
Income tax expense (benefit)	17			(108		)	571		—			480
Net income	$	3,758		$	735		$	3,787	$	(4,522	)	$	3,758
Comprehensive income (loss)	$	2,023		$	(230	)	$	2,051	$	(1,821	)	$	2,023

Condensed Consolidating Statement of Cash Flows

For the Year Ended December 31, 2015	Chubb Limited (Parent Guarantor)			ACE INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net cash flows from operating activities	$	3,125		$	682		$	3,836		$	(3,779	)	$	3,864
Cash flows from investing activities
Purchases of fixed maturities available for sale	—			—			(16,053		)	(18		)	(16,071		)
Purchases of fixed maturities held to maturity	—			—			(62		)	—			(62		)
Purchases of equity securities	—			—			(158		)	—			(158		)
Sales of fixed maturities available for sale	—			—			10,814			—			10,814
Sales of equity securities	—			—			183			—			183
Maturities and redemptions of fixed maturities available for sale	—			—			6,567			—			6,567
Maturities and redemptions of fixed maturities held to maturity	—			—			669			—			669
Net change in short-term investments	—			(7,588		)	(628		)	—			(8,216		)
Net derivative instruments settlements	—			(9		)	(12		)	—			(21		)
Acquisition of subsidiaries (net of cash acquired of $629)	—			—			264			—			264
Capital contribution	(2,670		)	(625		)	(2,791		)	6,086			—
Other	—			(25		)	(256		)	18			(263		)
Net cash flows used for investing activities	(2,670		)	(8,247		)	(1,463		)	6,086			(6,294		)
Cash flows from financing activities
Dividends paid on Common Shares	(862		)	—			—			—			(862		)
Common Shares repurchased	—			—			(758		)	—			(758		)
Proceeds from issuance of long-term debt	—			6,090			—			—			6,090
Proceeds from issuance of repurchase agreements	—			—			2,029			—			2,029
Repayment of long-term debt	—			(1,150		)	—			—			(1,150		)
Repayment of repurchase agreements	—			—			(2,027		)	—			(2,027		)
Proceeds from share-based compensation plans, including windfall tax benefits	—			—			131			—			131
Advances (to) from affiliates	(228		)	95			133			—			—
Dividends to parent company	—			—			(3,779		)	3,779			—
Capital contribution	—			2,791			3,295			(6,086		)	—
Net proceeds from affiliated notional cash pooling programs(1)	636			(220		)	—			(416		)	—
Policyholder contract deposits	—			—			503			—			503
Policyholder contract withdrawals	—			—			(221		)	—			(221		)
Other	—			(40		)	—			—			(40		)
Net cash flows (used for) from financing activities	(454		)	7,566			(694		)	(2,723		)	3,695
Effect of foreign currency rate changes on cash and cash equivalents	—			—			(145		)	—			(145		)
Net (decrease) increase in cash	1			1			1,534			(416		)	1,120
Cash – beginning of year(1)	—			1			1,209			(555		)	655
Cash – end of year(1)	$	1		$	2		$	2,743		$	(971	)	$	1,775

⁽¹⁾  Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2015 and 2014, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

Condensed Consolidating Statement of Cash Flows

For the Year Ended December 31, 2014	Chubb Limited (Parent Guarantor)			ACE INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net cash flows from (used for) operating activities	$	541		$	210		$	4,419		$	(674	)	$	4,496
Cash flows from investing activities
Purchases of fixed maturities available for sale	—			—			(15,816		)	263			(15,553		)
Purchases of fixed maturities held to maturity	—			—			(267		)	—			(267		)
Purchases of equity securities	—			—			(251		)	—			(251		)
Sales of fixed maturities available for sale	—			—			7,750			(268		)	7,482
Sales of equity securities	—			—			670			—			670
Maturities and redemptions of fixed maturities available for sale	—			—			6,413			—			6,413
Maturities and redemptions of fixed maturities held to maturity	—			—			875			—			875
Net change in short-term investments	—			(216		)	(392		)	5			(603		)
Net derivative instruments settlements	—			53			(283		)	—			(230		)
Acquisition of subsidiaries (net of cash acquired of $20)	—			—			(766		)	—			(766		)
Capital contribution	—			(258		)	—			258			—
Other	—			(8		)	(266		)	—			(274		)
Net cash flows used for investing activities	—			(429		)	(2,333		)	258			(2,504		)
Cash flows from financing activities
Dividends paid on Common Shares	(862		)	—			—			—			(862		)
Common Shares repurchased	—			—			(1,429		)	—			(1,429		)
Proceeds from issuance of long-term debt	—			699			—			—			699
Proceeds from the issuance of repurchase agreements	—			—			1,978			—			1,978
Repayment of long-term debt	—			(500		)	(1		)	—			(501		)
Repayment of repurchase agreements	—			—			(1,977		)	—			(1,977		)
Proceeds from share-based compensation plans, including windfall tax benefits	—			—			127			—			127
Advances (to) from affiliates	260			(298		)	38			—			—
Dividends to parent company	—			—			(674		)	674			—
Capital contribution	—			—			258			(258		)	—
Net proceeds from (payments to) affiliated notional cash pooling programs(1)	61			309			—			(370		)	—
Policyholder contract deposits	—			—			366			—			366
Policyholder contract withdrawals	—			—			(172		)	—			(172		)
Other	—			(6		)	—			—			(6		)
Net cash flows (used for) from financing activities	(541		)	204			(1,486		)	46			(1,777		)
Effect of foreign currency rate changes on cash and cash equivalents	—			—			(139		)	—			(139		)
Net (decrease) increase in cash	—			(15		)	461			(370		)	76
Cash – beginning of year(1)	—			16			748			(185		)	579
Cash – end of year(1)	$	—		$	1		$	1,209		$	(555	)	$	655

⁽¹⁾ Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2014 and 2013, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

Condensed Consolidating Statement of Cash Flows

For the Year Ended December 31, 2013	Chubb Limited (Parent Guarantor)			ACE INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net cash flows from (used for) operating activities	$	970		$	(107	)	$	3,984		$	(825	)	$	4,022
Cash flows from investing activities
Purchases of fixed maturities available for sale	—			—			(21,504		)	106			(21,398		)
Purchases of fixed maturities held to maturity	—			—			(447		)	—			(447		)
Purchases of equity securities	—			—			(264		)	—			(264		)
Sales of fixed maturities available for sale	—			—			10,519			(106		)	10,413
Sales of equity securities	—			—			142			—			142
Maturities and redemptions of fixed maturities available for sale	—			—			6,941			—			6,941
Maturities and redemptions of fixed maturities held to maturity	—			—			1,488			—			1,488
Net change in short-term investments	(1		)	4			521			—			524
Net derivative instruments settlements	—			(1		)	(470		)	—			(471		)
Capital contribution	(133		)	(1,097		)	—			1,230			—
Acquisition of subsidiaries (net of cash acquired of $38)	—			—			(977		)	—			(977		)
Other	—			(4		)	(389		)	—			(393		)
Net cash flows used for investing activities	(134		)	(1,098		)	(4,440		)	1,230			(4,442		)
Cash flows from financing activities
Dividends paid on Common Shares	(517		)	—			—			—			(517		)
Common Shares repurchased	—			—			(287		)	—			(287		)
Proceeds from issuance of long-term debt	—			947			—						947
Proceeds from issuance of repurchase agreements	—			—			2,572			—			2,572
Repayment of repurchase agreements	—			—			(2,572		)	—			(2,572		)
Proceeds from share-based compensation plans, including windfall tax benefits	14			—			121			—			135
Advances from (to) affiliates	(621		)	621			—			—			—
Dividends to parent company	—			—			(825		)	825			—
Capital contribution	—			—			1,230			(1,230		)	—
Net proceeds from (payments to) affiliated notional cash pooling programs(1)	185			(349		)	—			164			—
Policyholder contract deposits	—			—			233			—			233
Policyholder contract withdrawals	—			—			(120		)	—			(120		)
Other	—			—			—			—			—
Net cash flows (used for) from financing activities	(939		)	1,219			352			(241		)	391
Effect of foreign currency rate changes on cash and cash equivalents	—			—			(7		)	—			(7		)
Net increase (decrease) in cash	(103		)	14			(111		)	164			(36		)
Cash – beginning of year(1)	103			2			859			(349		)	615
Cash – end of year(1)	$	—		$	16		$	748		$	(185	)	$	579

⁽¹⁾ Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2013 and 2012, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

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Condensed Unaudited Quarterly Financial Data

12 Months Ended

Dec. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Condensed unaudited quarterly financial data

Condensed unaudited quarterly financial data

	Three Months Ended
	March 31			June 30		September 30			December 31
(in millions of U.S. dollars, except per share data)	2015			2015		2015			2015
Net premiums earned	$	3,927		$	4,360	$	4,719		$	4,207
Net investment income	551			562		549			532
Net realized gains (losses) including OTTI	(89		)	126		(397		)	(60		)
Total revenues	$	4,389		$	5,048	$	4,871		$	4,679
Losses and loss expenses	$	2,122		$	2,417	$	2,643		$	2,302
Policy benefits	$	142		$	153	$	89		$	159
Net income	$	681		$	942	$	528		$	683
Basic earnings per share	$	2.08		$	2.89	$	1.63		$	2.10
Diluted earnings per share	$	2.05		$	2.86	$	1.62		$	2.08

	Three Months Ended
	March 31			June 30			September 30			December 31
(in millions of U.S. dollars, except per share data)	2014			2014			2014			2014
Net premiums earned	$	3,970		$	4,332		$	4,754		$	4,370
Net investment income	553			556			566			577
Net realized gains (losses) including OTTI	(104		)	(73		)	(120		)	(210		)
Total revenues	$	4,419		$	4,815		$	5,200		$	4,737
Losses and loss expenses	$	2,161		$	2,388		$	2,684		$	2,416
Policy benefits	$	114		$	144		$	125		$	134
Net income (1)	$	734		$	779		$	785		$	555
Basic earnings per share	$	2.16		$	2.30		$	2.35		$	1.68
Diluted earnings per share	$	2.14		$	2.28		$	2.32		$	1.66

⁽¹⁾ Net income for the three months ended December 31, 2014 includes $89 million of net charges related to income taxes to correct prior periods. Such amounts are not material to any period presented.

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Schedule I

12 Months Ended

Dec. 31, 2015

Summary of Investments, Other than Investments in Related Parties [Abstract]

Schedule I: SUMMARY OF INVESTEMENTS - OTHER THAN INVESTMENTS IN RELATED PARTIES

SUMMARY OF INVESTMENTS – OTHER THAN INVESTMENTS IN RELATED PARTIES

December 31, 2015 (in millions of U.S. dollars)	Cost or Amortized Cost		Fair Value		Amount at Which Shown in the Balance Sheet
Fixed maturities available for sale
U.S. Treasury and agency	$	2,481	$	2,528	$	2,528
Foreign	13,190		13,445		13,445
Corporate securities	15,028		14,929		14,929
Mortgage-backed securities	9,827		9,958		9,958
States, municipalities, and political subdivisions	2,623		2,727		2,727
Total fixed maturities available for sale	43,149		43,587		43,587
Fixed maturities held to maturity
U.S. Treasury and agency	733		745		733
Foreign	763		785		763
Corporate securities	3,054		3,056		3,054
Mortgage-backed securities	1,707		1,743		1,707
States, municipalities, and political subdivisions	2,173		2,223		2,173
Total fixed maturities held to maturity	8,430		8,552		8,430
Equity securities
Industrial, miscellaneous, and all other	441		497		497
Short-term investments	10,446		10,446		10,446
Other investments	2,993		3,291		3,291
Total investments - other than investments in related parties	$	65,459	$	66,373	$	66,251

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Schedule II

12 Months Ended

Dec. 31, 2015

Condensed Financial Information of Parent Company Only Disclosure [Abstract]

Schedule II - CONDENSED FINANCIAL INFORMATION OF REGISTRANT

CONDENSED FINANCIAL INFORMATION OF REGISTRANT

BALANCE SHEETS (Parent Company Only)

	December 31			December 31
(in millions of U.S. dollars)	2015			2014
Assets
Investments in subsidiaries and affiliates on equity basis	$	29,612		$	29,497
Short-term investments	1			1
Other investments, at cost	27			29
Total investments	29,640			29,527
Cash	1			—
Due from subsidiaries and affiliates, net	644			583
Other assets	8			4
Total assets	$	30,293		$	30,114
Liabilities
Affiliated notional cash pooling programs(1)	$	882		$	246
Accounts payable, accrued expenses, and other liabilities	276			281
Total liabilities	1,158			527
Shareholders' equity
Common Shares	7,833			8,055
Common Shares in treasury	(1,922		)	(1,448		)
Additional paid-in capital	4,481			5,145
Retained earnings	19,478			16,644
Accumulated other comprehensive income (loss)	(735		)	1,191
Total shareholders' equity	29,135			29,587
Total liabilities and shareholders' equity	$	30,293		$	30,114
(1) Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information.
The condensed financial information should be read in conjunction with the consolidated financial statements and notes thereto.

CONDENSED FINANCIAL INFORMATION OF REGISTRANT

STATEMENTS OF OPERATIONS (Parent Company Only)

	Years Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Revenues
Investment income, including interest income	$	35		$	37		$	34
Equity in net income of subsidiaries and affiliates	2,673			2,707			3,580
Net realized gains (losses)	—			—			—
	2,708			2,744			3,614
Expenses
Administrative and other (income) expense	(142		)	(123		)	(161		)
Income tax expense	16			14			17
	(126		)	(109		)	(144		)
Net income	$	2,834		$	2,853		$	3,758
Comprehensive income	$	908		$	2,892		$	2,023
The condensed financial information should be read in conjunction with the consolidated financial statements and notes thereto.

CONDENSED FINANCIAL INFORMATION OF REGISTRANT

STATEMENTS OF CASH FLOWS (Parent Company Only)

	Year Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Net cash flows from operating activities(1)	$	3,125		$	541		$	970
Cash flows from investing activities
Net change in short-term investments	—			—			(1		)
Net derivative instruments settlements	—			—			—
Capital contribution	(2,670		)	—			(133		)
Net cash flows used for investing activities	(2,670		)	—			(134		)
Cash flows from financing activities
Dividends paid on Common Shares	(862		)	(862		)	(517		)
Proceeds from issuance of short-term debt	—			—			—
Repayment of short-term debt	—			—			—
Proceeds from share-based compensation plans	—			—			14
Advances (to) from affiliates	(228		)	260			(621		)
Net proceeds from affiliated notional cash pooling programs(2)	636			61			185
Net cash flows used for financing activities	(454		)	(541		)	(939		)
Net decrease in cash	1			—			(103		)
Cash – beginning of year	—			—			103
Cash – end of year	$	1		$	—		$	—
(1) Includes cash dividends received from subsidiaries of $2.9 billion, $300 million, and $825 million in 2015, 2014, and 2013, respectively.
(2) Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information.
The condensed financial information should be read in conjunction with the consolidated financial statements and notes thereto.

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Schedule IV

12 Months Ended

Dec. 31, 2015

Supplemental Schedule of Reinsurance Premiums for Insurance Companies [Abstract]

SUPPLEMENTAL INFORMATION CONCERNING REINSURANCE

SUPPLEMENTAL INFORMATION CONCERNING REINSURANCE

Premiums Earned
For the years ended December 31, 2015, 2014, and 2013 (in millions of U.S. dollars, except for percentages)	Direct Amount		Ceded To Other Companies		Assumed From Other Companies		Net Amount		Percentage of Amount Assumed to Net
2015
Property and Casualty	$	14,895	$	5,373	$	3,259	$	12,781	25	%
Accident and Health	3,684		351		168		3,501		5	%
Life	776		94		249		931		27	%
Total	$	19,355	$	5,818	$	3,676	$	17,213	21	%
2014
Property and Casualty	$	14,784	$	4,940	$	2,923	$	12,767	23	%
Accident and Health	3,971		434		141		3,678		4	%
Life	800		91		272		981		28	%
Total	$	19,555	$	5,465	$	3,336	$	17,426	19	%
2013
Property and Casualty	$	14,286	$	5,160	$	3,015	$	12,141	25	%
Accident and Health	3,885		486		168		3,567		5	%
Life	685		76		296		905		33	%
Total	$	18,856	$	5,722	$	3,479	$	16,613	21	%

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Schedule VI

12 Months Ended

Dec. 31, 2015

Supplemental Information for Property, Casualty Insurance Underwriters [Abstract]

SUPPLEMENTARY INFORMATION CONCERNING PROPERTY AND CASUALTY OPERATIONS

SUPPLEMENTARY INFORMATION CONCERNING PROPERTY AND CASUALTY OPERATIONS

As of and for the years ended December 31, 2015, 2014, and 2013 (in millions of U.S. dollars)
	Deferred Policy Acquisition Costs		Net Reserves for Unpaid Losses and Loss Expenses		Unearned Premiums		Net Premiums Earned		Net Investment Income		Net Losses and Loss Expenses Incurred Related to						Amortization of Deferred Policy Acquisition Costs		Net Paid Losses and Loss Expenses		Net Premiums Written
												Current Year		Prior Year
2015	$	2,219	$	26,562	$	8,439	$	16,282	$	2,007		$	10,030	$	(546	)	$	2,692	$	9,665	$	16,734
2014	$	2,057	$	27,008	$	8,222	$	16,445	$	2,071		$	10,176	$	(527	)	$	2,805	$	9,235	$	16,787
2013	$	1,865	$	26,831	$	7,539	$	15,708	$	1,977		$	9,878	$	(530	)	$	2,447	$	8,977	$	16,069

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Summary of significant accounting policies (Policies)

12 Months Ended

Dec. 31, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of presentation

Basis of presentation

On January 14, 2016, we completed the acquisition of The Chubb Corporation, creating a global leader in property and casualty insurance. We have changed our name from ACE Limited to Chubb Limited and plan to adopt the Chubb name globally. All references to Chubb Limited throughout this Form 10-K refer to legacy ACE Limited, unless otherwise indicated. The financial condition and results presented herein are those of legacy ACE Limited and its subsidiaries and do not include the results of legacy Chubb Corporation and its subsidiaries.

Chubb Limited is a holding company incorporated in Zurich, Switzerland. Chubb Limited, through its subsidiaries, provides a broad range of insurance and reinsurance products to insureds worldwide. Through December 31, 2015 Chubb operated through five business segments: Insurance – North American P&C, Insurance – North American Agriculture, Insurance – Overseas General, Global Reinsurance, and Life. Refer to Note 16 for additional information.

The accompanying consolidated financial statements, which include the accounts of Chubb Limited and its subsidiaries (collectively, Chubb, we, us, or our), have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) and, in the opinion of management, reflect all adjustments (consisting of normally recurring accruals) necessary for a fair statement of the results and financial position for such periods. All significant intercompany accounts and transactions, including internal reinsurance transactions, have been eliminated.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Amounts included in the consolidated financial statements reflect our best estimates and assumptions; actual amounts could differ materially from these estimates. Chubb's principal estimates include:

• unpaid loss and loss expense reserves, including long-tail asbestos and environmental (A&E) reserves;

• future policy benefits reserves;

• the valuation of value of business acquired (VOBA) and amortization of deferred policy acquisition costs and VOBA;

• reinsurance recoverable, including a provision for uncollectible reinsurance;

• the assessment of risk transfer for certain structured insurance and reinsurance contracts;

• the valuation of the investment portfolio and assessment of OTTI;

• the valuation of deferred tax assets;

• the valuation of derivative instruments related to guaranteed living benefits (GLB); and

• the assessment of goodwill for impairment.

Premiums

Premiums

Premiums are generally recorded as written upon inception of the policy. For multi-year policies for which premiums written are payable in annual installments, only the current annual premium is included as written at policy inception due to the ability of the insured/reinsured to commute or cancel coverage within the policy term. The remaining annual premiums are recorded as written at each successive anniversary date within the multi-year term.

For property and casualty (P&C) insurance and reinsurance products, premiums written are primarily earned on a pro-rata basis over the policy terms to which they relate. Unearned premiums represent the portion of premiums written applicable to the unexpired portion of the policies in force. For retrospectively-rated policies, written premiums are adjusted to reflect expected ultimate premiums consistent with changes to incurred losses, or other measures of exposure as stated in the policy, and earned over the policy coverage period. For retrospectively-rated multi-year policies, premiums recognized in the current period are computed, using a with-and-without method, as the difference between the ceding enterprise's total contract costs before and after the experience under the contract at the reporting date. Accordingly, for retrospectively-rated multi-year policies, additional premiums are generally written and earned when losses are incurred.

Mandatory reinstatement premiums assessed on reinsurance policies are earned in the period of the loss event that gave rise to the reinstatement premiums.  All remaining unearned premiums are recognized over the remaining coverage period. 

Premiums from long-duration contracts such as certain traditional term life, whole life, endowment, and long-duration personal accident and health (A&H) policies are generally recognized as revenue when due from policyholders. Traditional life policies include those contracts with fixed and guaranteed premiums and benefits. Benefits and expenses are matched with income to result in the recognition of profit over the life of the contracts.

Retroactive loss portfolio transfer (LPT) contracts in which the insured loss events occurred prior to contract inception are evaluated to determine whether they meet criteria for reinsurance accounting. If reinsurance accounting is appropriate, written premiums are fully earned and corresponding losses and loss expenses recognized at contract inception. These contracts can cause significant variances in gross premiums written, net premiums written, net premiums earned, and net incurred losses in the years in which they are written. Reinsurance contracts sold not meeting criteria for reinsurance accounting are recorded using the deposit method as described below in Note 1 k).

Reinsurance premiums assumed are based on information provided by ceding companies supplemented by our own estimates of premium when we have not received ceding company reports. Estimates are reviewed and adjustments are recorded in the period in which they are determined. Premiums are earned over the coverage terms of the related reinsurance contracts and range from one to three years.

Deferred policy acquisition costs and value of business acquired

Deferred policy acquisition costs and value of business acquired

Policy acquisition costs consist of commissions (direct and ceded), premium taxes, and certain underwriting costs related directly to the successful acquisition of new or renewal insurance contracts. A VOBA intangible asset is established upon the acquisition of blocks of long-duration contracts in a business combination and represents the present value of estimated net cash flows for the contracts in force at the acquisition date. Acquisition costs and VOBA, collectively policy acquisition costs, are deferred and amortized. Amortization is recorded in Policy acquisition costs in the consolidated statements of operations. Policy acquisition costs on P&C contracts are generally amortized ratably over the period in which premiums are earned. Policy acquisition costs on traditional long-duration contracts are amortized over the estimated life of the contracts, generally in proportion to premium revenue recognized based upon the same assumptions used in estimating the liability for future policy benefits. For non-traditional long-duration contracts, we amortize policy acquisition costs over the expected life of the contracts in proportion to expected gross profits.  The effect of changes in estimates of expected gross profits is reflected in the period the estimates are revised. Policy acquisition costs are reviewed to determine if they are recoverable from future income, including investment income. Unrecoverable policy acquisition costs are expensed in the period identified.

Advertising costs are expensed as incurred except for direct-response campaigns that qualify for cost deferral, principally related to long-duration A&H business produced by the Insurance – Overseas General segment, which are deferred and recognized as a component of Policy acquisition costs. For individual direct-response marketing campaigns that we can demonstrate have specifically resulted in incremental sales to customers and such sales have probable future economic benefits, incremental costs directly related to the marketing campaigns are capitalized as Deferred policy acquisition costs. Deferred policy acquisition costs, including deferred marketing costs, are reviewed regularly for recoverability from future income, including investment income, and amortized in proportion to premium revenue recognized, primarily over a ten-year period, the expected economic future benefit period based upon the same assumptions used in estimating the liability for future policy benefits. The expected future benefit period is evaluated periodically based on historical results and adjusted prospectively. The amount of deferred marketing costs reported in Deferred policy acquisition costs in the consolidated balance sheets was $250 million and $288 million at December 31, 2015 and 2014, respectively. Amortization expense for deferred marketing costs was $78 million, $99 million, and $128 million for the years ended December 31, 2015, 2014, and 2013, respectively.

Reinsurance

Reinsurance

Chubb assumes and cedes reinsurance with other insurance companies to provide greater diversification of business and minimize the net loss potential arising from large risks. Ceded reinsurance contracts do not relieve Chubb of its primary obligation to policyholders.

For both ceded and assumed reinsurance, risk transfer requirements must be met in order to account for a contract as reinsurance, principally resulting in the recognition of cash flows under the contract as premiums and losses. To meet risk transfer requirements, a reinsurance contract must include insurance risk, consisting of both underwriting and timing risk, and a reasonable possibility of a significant loss for the assuming entity. To assess risk transfer for certain contracts, Chubb generally develops expected discounted cash flow analyses at contract inception. Deposit accounting is used for contracts that do not meet risk transfer requirements. Deposit accounting requires that consideration received or paid be recorded in the balance sheet as opposed to recording premiums written or losses incurred in the statement of operations. Non-refundable fees on deposit contracts are earned based on the terms of the contract described below in Note 1 k).

Reinsurance recoverable includes balances due from reinsurance companies for paid and unpaid losses and loss expenses and policy benefits that will be recovered from reinsurers, based on contracts in force. The method for determining the reinsurance recoverable on unpaid losses and loss expenses incurred but not reported (IBNR) involves actuarial estimates consistent with those used to establish the associated liability for unpaid losses and loss expenses as well as a determination of Chubb's ability to cede unpaid losses and loss expenses under the terms of the reinsurance agreement.

Reinsurance recoverable is presented net of a provision for uncollectible reinsurance determined based upon a review of the financial condition of reinsurers and other factors. The provision for uncollectible reinsurance is based on an estimate of the reinsurance recoverable balance that will ultimately be unrecoverable due to reinsurer insolvency, a contractual dispute, or any other reason. The valuation of this provision includes several judgments including certain aspects of the allocation of reinsurance recoverable on IBNR claims by reinsurer and a default analysis to estimate uncollectible reinsurance. The primary components of the default analysis are reinsurance recoverable balances by reinsurer, net of collateral, and default factors used to determine the portion of a reinsurer's balance deemed uncollectible. The definition of collateral for this purpose requires some judgment and is generally limited to assets held in a Chubb-only beneficiary trust, letters of credit, and liabilities held with the same legal entity for which Chubb believes there is a contractual right of offset. The determination of the default factor is principally based on the financial strength rating of the reinsurer. Default factors require considerable judgment and are determined using the current financial strength rating, or rating equivalent, of each reinsurer as well as other key considerations and assumptions. The more significant considerations include, but are not necessarily limited to, the following:

• For reinsurers that maintain a financial strength rating from a major rating agency, and for which recoverable balances are considered representative of the larger population (i.e., default probabilities are consistent with similarly rated reinsurers and payment durations conform to averages), the financial rating is based on a published source and the default factor is based on published default statistics of a major rating agency applicable to the reinsurer's particular rating class. When a recoverable is expected to be paid in a brief period of time by a highly rated reinsurer, such as certain property catastrophe claims, a default factor may not be applied;

• For balances recoverable from reinsurers that are both unrated by a major rating agency and for which management is unable to determine a credible rating equivalent based on a parent, affiliate, or peer company, we determine a rating equivalent based on an analysis of the reinsurer that considers an assessment of the creditworthiness of the particular entity, industry benchmarks, or other factors as considered appropriate. We then apply the applicable default factor for that rating class. For balances recoverable from unrated reinsurers for which the ceded reserve is below a certain threshold, we generally apply a default factor of 34 percent, consistent with published statistics of a major rating agency;

• For balances recoverable from reinsurers that are either insolvent or under regulatory supervision, we establish a default factor and resulting provision for uncollectible reinsurance based on reinsurer-specific facts and circumstances. Upon initial notification of an insolvency, we generally recognize an expense for a substantial portion of all balances outstanding, net of collateral, through a combination of write-offs of recoverable balances and increases to the provision for uncollectible reinsurance. When regulatory action is taken on a reinsurer, we generally recognize a default factor by estimating an expected recovery on all balances outstanding, net of collateral. When sufficient credible information becomes available, we adjust the provision for uncollectible reinsurance by establishing a default factor pursuant to information received; and

• For other recoverables, management determines the provision for uncollectible reinsurance based on the specific facts and circumstances.

The methods used to determine the reinsurance recoverable balance and related provision for uncollectible reinsurance are regularly reviewed and updated, and any resulting adjustments are reflected in earnings in the period identified.

Prepaid reinsurance premiums represent the portion of premiums ceded to reinsurers applicable to the unexpired coverage terms of the reinsurance contracts in force.

The value of reinsurance business assumed of $21 million and $26 million at December 31, 2015 and 2014, respectively, included in Other assets in the accompanying consolidated balance sheets, represents the excess of estimated ultimate value of the liabilities assumed under retroactive reinsurance contracts over consideration received. The value of reinsurance business assumed is amortized and recorded to losses and loss expenses based on the payment pattern of the losses assumed and ranges between 9 and 40 years. The unamortized value is reviewed regularly to determine if it is recoverable based upon the terms of the contract, estimated losses and loss expenses, and anticipated investment income. Unrecoverable amounts are expensed in the period identified.

Investments

Investments

Fixed maturities are classified as either available for sale or held to maturity. The available for sale portfolio is reported at fair value. The held to maturity portfolio includes securities for which we have the ability and intent to hold to maturity or redemption and is reported at amortized cost. Equity securities are classified as available for sale and are recorded at fair value. Short-term investments comprise securities due to mature within one year of the date of purchase and are recorded at fair value which typically approximates cost. Short-term investments include certain cash and cash equivalents, which are part of investment portfolios under the management of external investment managers.

Other investments principally comprise life insurance policies, policy loans, trading securities, other direct equity investments, investment funds, and limited partnerships.

• Life insurance policies are carried at policy cash surrender value and income is recorded in other income (expense).

• Policy loans are carried at outstanding balance and interest income is recorded to net investment income.

• Trading securities are recorded on a trade date basis and carried at fair value. Unrealized gains and losses on trading securities are reflected in Other (income) expense.

• Other investments over which Chubb can exercise significant influence are accounted for using the equity method and income is recorded in Other (income) expense.

• All other investments over which Chubb cannot exercise significant influence are carried at fair value with changes in fair value recognized through OCI. For these investments, investment income is recognized in net investment income and realized gains are recognized as related distributions are received.

• Partially-owned investment companies comprise entities in which we hold an ownership interest in excess of three percent. These investments as well as Chubb's investments in investment funds where our ownership interest is in excess of three percent are accounted for under the equity method because Chubb exerts significant influence. These investments apply investment company accounting to determine operating results, and Chubb retains the investment company accounting in applying the equity method. This means that investment income, realized gains or losses, and unrealized gains or losses are included in the portion of equity earnings reflected in Other (income) expense.

Investments in partially-owned insurance companies primarily represent direct investments in which Chubb has significant influence and, as such, meet the requirements for equity accounting. We report our share of the net income or loss of the partially-owned insurance companies in Other (income) expense.

Realized gains or losses on sales of investments are determined on a first-in, first-out basis. Unrealized appreciation (depreciation) on investments is included as a separate component of AOCI in Shareholders' equity. We regularly review our investments for OTTI. Refer to Note 3 for additional information.

With respect to securities where the decline in value is determined to be temporary and the security's value is not written down, a subsequent decision may be made to sell that security and realize a loss. Subsequent decisions on security sales are the result of changing or unforeseen facts and circumstances (i.e., arising from a large insured loss such as a catastrophe), deterioration of the creditworthiness of the issuer or its industry, or changes in regulatory requirements. We believe that subsequent decisions to sell such securities are consistent with the classification of the majority of the portfolio as available for sale.

We use derivative instruments including futures, options, swaps, and foreign currency forward contracts for the purpose of managing certain investment portfolio risks and exposures. Refer to Note 10 for additional information. Derivatives are reported at fair value and are recorded in the accompanying consolidated balance sheets in either Accounts payable, accrued expenses, and other liabilities or Other assets with changes in fair value included in Net realized gains (losses) in the consolidated statements of operations. Collateral held by brokers equal to a percentage of the total value of open futures contracts is included in the investment portfolio.

Net investment income includes interest and dividend income and amortization of fixed maturity market premiums and discounts and is net of investment management and custody fees. For mortgage-backed securities, and any other holdings for which there is a prepayment risk, prepayment assumptions are evaluated and revised as necessary. Any adjustments required due to the resultant change in effective yields and maturities are recognized prospectively. Prepayment fees or call premiums that are only payable when a security is called prior to its maturity are earned when received and reflected in Net investment income. 

Chubb participates in a securities lending program operated by a third-party banking institution whereby certain assets are loaned to qualified borrowers and from which we earn an incremental return. Borrowers provide collateral, in the form of either cash or approved securities, of 102 percent of the fair value of the loaned securities.  Each security loan is deemed to be an overnight transaction.  Cash collateral is invested in a collateral pool which is managed by the banking institution.  The collateral pool is subject to written investment guidelines with key objectives which include the safeguard of principal and adequate liquidity to meet anticipated redemptions. The fair value of the loaned securities is monitored on a daily basis, with additional collateral obtained or refunded as the fair value of the loaned securities changes. The collateral is held by the third-party banking institution, and the collateral can only be accessed in the event that the institution borrowing the securities is in default under the lending agreement. As a result of these restrictions, we consider our securities lending activities to be non-cash investing and financing activities. An indemnification agreement with the lending agent protects us in the event a borrower becomes insolvent or fails to return any of the securities on loan. The fair value of the securities on loan is included in fixed maturities and equity securities. The securities lending collateral is reported as a separate line in total assets with a related liability reflecting our obligation to return the collateral plus interest.

Similar to securities lending arrangements, securities sold under repurchase agreements, whereby Chubb sells securities and repurchases them at a future date for a predetermined price, are accounted for as collateralized investments and borrowings and are recorded at the contractual repurchase amounts plus accrued interest. Assets to be repurchased are the same, or substantially the same, as the assets transferred and the transferor, through right of substitution, maintains the right and ability to redeem the collateral on short notice. The fair value of the underlying securities is included in fixed maturities and equity securities. In contrast to securities lending programs, the use of cash received is not restricted. We report the obligation to return the cash as Repurchase agreements in the consolidated balance sheets.

Refer to Note 4 for a discussion on the determination of fair value for Chubb's various investment securities.

Cash

Cash

Cash includes cash on hand and deposits with an original maturity of three months or less at time of purchase. Cash held by external money managers is included in Short-term investments.

We have agreements with a third-party bank provider which implemented two international multi-currency notional cash pooling programs. In each program, participating Chubb entities establish deposit accounts in different currencies with the bank provider and each day the credit or debit balances in every account are notionally translated into a single currency (U.S. dollars) and then notionally pooled. The bank extends overdraft credit to any participating Chubb entity as needed, provided that the overall notionally-pooled balance of all accounts in each pool at the end of each day is at least zero. Actual cash balances are not physically converted and are not commingled between legal entities. Any overdraft balances incurred under this program by a Chubb entity would be guaranteed by Chubb Limited (up to $300 million in the aggregate). Our syndicated letter of credit facility allows for same day drawings to fund a net pool overdraft should participating Chubb entities overdraw contributed funds from the pool.

Goodwill and other intangible assets

Goodwill and other intangible assets

Goodwill represents the excess of the cost of acquisitions over the fair value of net assets acquired and is not amortized. Goodwill is assigned at acquisition to the applicable reporting unit of the acquired entities giving rise to the goodwill. Goodwill impairment tests are performed annually or more frequently if circumstances indicate a possible impairment.  For goodwill impairment testing, we use a qualitative assessment to determine whether it is more likely than not (i.e., more than a 50 percent probability) that the fair value of a reporting unit is greater than its carrying amount. If our assessment indicates less than a 50 percent probability that fair value exceeds carrying value, we quantitatively estimate a reporting unit's fair value. Goodwill recorded in connection with investments in partially-owned insurance companies is recorded in Investments in partially-owned insurance companies and is also measured for impairment annually.

Indefinite lived intangible assets are not subject to amortization. Finite lived intangible assets are amortized over their useful lives, generally ranging from 1 to 30 years. Intangible assets are regularly reviewed for indicators of impairment. Impairment is recognized if the carrying amount is not recoverable from its undiscounted cash flows and is measured as the difference between the carrying amount and fair value.

Unpaid losses and loss expenses

Unpaid losses and loss expenses

A liability is established for the estimated unpaid losses and loss expenses under the terms of, and with respect to, Chubb's policies and agreements. Similar to premiums that are recognized as revenues over the coverage period of the policy, a liability for unpaid losses and loss expenses is recognized as expense when insured events occur over the coverage period of the policy. This liability includes a provision for both reported claims (case reserves) and incurred but not reported claims (IBNR reserves). IBNR reserve estimates are generally calculated by first projecting the ultimate cost of all losses that have occurred (expected losses), and then subtracting paid losses, case reserves, and loss expenses. The methods of determining such estimates and establishing the resulting liability are reviewed regularly and any adjustments are reflected in operations in the period in which they become known. Future developments may result in losses and loss expenses materially greater or less than recorded amounts.

Except for net loss and loss expense reserves of $42 million net of discount, held at December 31, 2015, representing certain structured settlements for which the timing and amount of future claim payments are reliably determinable and $50 million, net of discount, of certain reserves for unsettled claims that are discounted in statutory filings, Chubb does not discount its P&C loss reserves. This compares with reserves of $49 million for certain structured settlements and $62 million of certain reserves for unsettled claims at December 31, 2014. Structured settlements represent contracts purchased from life insurance companies primarily to settle workers' compensation claims, where payments to the claimant by the life insurance company are expected to be made in the form of an annuity. Chubb retains the liability to the claimant in the event that the life insurance company fails to pay. At December 31, 2015, the gross liability due to claimants was $588 million, net of discount, and reinsurance recoverables due from the life insurance companies was $546 million, net of discount. For structured settlement contracts where payments are guaranteed regardless of claimant life expectancy, the amounts recoverable from the life insurance companies at December 31, 2015 are included in Other assets in the consolidated balance sheets, as they do not meet the requirements for reinsurance accounting.

Included in Unpaid losses and loss expenses are liabilities for asbestos and environmental (A&E) claims and expenses. These unpaid losses and loss expenses are principally related to claims arising from remediation costs associated with hazardous waste sites and bodily-injury claims related to asbestos products and environmental hazards. The estimation of these liabilities is particularly sensitive to changes in the legal environment including specific settlements that may be used as precedents to settle future claims. However, Chubb does not anticipate future changes in laws and regulations in setting its A&E reserve levels.

Prior period development arises from changes to loss estimates recognized in the current year that relate to loss reserves first reported in previous calendar years and excludes the effect of losses from the development of earned premiums from previous accident years.

For purposes of analysis and disclosure, management views prior period development to be changes in the nominal value of loss estimates from period to period, net of premium and profit commission adjustments on loss sensitive contracts. Prior period development generally excludes changes in loss estimates that do not arise from the emergence of claims, such as those related to uncollectible reinsurance, interest, unallocated loss adjustment expenses, or foreign currency. Accordingly, specific items excluded from prior period development include the following: gains/losses related to foreign currency remeasurement; losses recognized from the early termination or commutation of reinsurance agreements that principally relate to the time value of money; changes in the value of reinsurance business assumed reflected in losses incurred but principally related to the time value of money; and losses that arise from changes in estimates of earned premiums from prior accident years. Except for foreign currency remeasurement, which is included in Net realized gains (losses), these items are included in current year losses.

Future policy benefits

Future policy benefits

The valuation of long-duration contract reserves requires management to make estimates and assumptions regarding expenses, mortality, persistency, and investment yields. Estimates are primarily based on historical experience and information provided by ceding companies and include a margin for adverse deviation. Interest rates used in calculating reserves range from less than 1.0 percent to 7.2 percent and less than 1.0 percent to 6.5 percent at December 31, 2015 and 2014, respectively. Actual results could differ materially from these estimates. Management monitors actual experience and where circumstances warrant, will revise assumptions and the related reserve estimates. Revisions are recorded in the period they are determined.

Certain of our long-duration contracts are supported by assets that do not qualify for separate account reporting under GAAP. These assets are classified as trading securities and reported in Other investments and the offsetting liabilities are reported in Future policy benefits in the consolidated balance sheets. Changes in the fair value of separate account assets that do not qualify for separate account reporting under GAAP are reported in Other income (expense) and the offsetting movements in the liabilities are included in Policy benefits in the consolidated statements of operations.

Assumed reinsurance programs involving minimum benefit guarantees under annuity contracts

Assumed reinsurance programs involving minimum benefit guarantees under variable annuity contracts

Chubb reinsures various death and living benefit guarantees associated with variable annuities issued primarily in the United States and Japan. We generally receive a monthly premium during the accumulation phase of the covered annuities (in-force) based on a percentage of either the underlying accumulated account values or the underlying accumulated guaranteed values. Depending on an annuitant's age, the accumulation phase can last many years. To limit our exposure under these programs, all reinsurance treaties include annual or aggregate claim limits and many include an aggregate deductible.

The guarantees which are payable on death, referred to as guaranteed minimum death benefits (GMDB), principally cover shortfalls between accumulated account value at the time of an annuitant's death and either i) an annuitant's total deposits; ii) an annuitant's total deposits plus a minimum annual return; or iii) the highest accumulated account value attained at any policy anniversary date. In addition, a death benefit may be based on a formula specified in the variable annuity contract that uses a percentage of the growth of the underlying contract value. Liabilities for GMDBs are based on cumulative assessments or premiums to date multiplied by a benefit ratio that is determined by estimating the present value of benefit payments and related adjustment expenses divided by the present value of cumulative assessment or expected premiums during the contract period.  

Under reinsurance programs covering GLBs, we assume the risk of guaranteed minimum income benefits (GMIB) and guaranteed minimum accumulation benefits (GMAB) associated with variable annuity contracts. The GMIB risk is triggered if, at the time the contract holder elects to convert the accumulated account value to a periodic payment stream (annuitize), the accumulated account value is not sufficient to provide a guaranteed minimum level of monthly income. The GMAB risk is triggered if, at contract maturity, the contract holder's account value is less than a guaranteed minimum value. Our GLB reinsurance products meet the definition of a derivative for accounting purposes and is carried at fair value with changes in fair value recognized in income. Refer to Notes 5c) and 10 a) for additional information.

Deposit assets and liabilities

Deposit assets and liabilities

Deposit assets arise from ceded reinsurance contracts purchased that do not transfer significant underwriting or timing risk. Deposit liabilities include reinsurance deposit liabilities and contract holder deposit funds. The reinsurance deposit liabilities arise from contracts sold for which there is not a significant transfer of risk. Contract holder deposit funds represent a liability for investment contracts sold that do not meet the definition of an insurance contract, and certain of these contracts are sold with a guaranteed rate of return. Under deposit accounting, consideration received or paid is recorded as a deposit asset or liability in the balance sheet as opposed to recording premiums and losses in the statement of operations.

Interest income on deposit assets, representing the consideration received or to be received in excess of cash payments related to the deposit contract, is earned based on an effective yield calculation. The calculation of the effective yield is based on the amount and timing of actual cash flows at the balance sheet date and the estimated amount and timing of future cash flows. The effective yield is recalculated periodically to reflect revised estimates of cash flows. When a change in the actual or estimated cash flows occurs, the resulting change to the carrying amount of the deposit asset is reported as income or expense. Deposit assets of $86 million and $89 million at December 31, 2015 and 2014, respectively, are reflected in Other assets in the consolidated balance sheets and the accretion of deposit assets related to interest pursuant to the effective yield calculation is reflected in Net investment income in the consolidated statements of operations.

Deposit liabilities include reinsurance deposit liabilities of $110 million and $120 million and contract holder deposit funds of $1.1 billion and $908 million at December 31, 2015 and 2014, respectively. Deposit liabilities are reflected in Accounts payable, accrued expenses, and other liabilities in the consolidated balance sheets. At contract inception, the deposit liability equals net cash received. An accretion rate is established based on actuarial estimates whereby the deposit liability is increased to the estimated amount payable over the contract term. The deposit accretion rate is the rate of return required to fund expected future payment obligations. We periodically reassess the estimated ultimate liability and related expected rate of return. Changes to the deposit liability are generally reflected through Interest expense to reflect the cumulative effect of the period the contract has been in force, and by an adjustment to the future accretion rate of the liability over the remaining estimated contract term.

The liability for contract holder deposit funds equals accumulated policy account values, which consist of the deposit payments plus credited interest less withdrawals and amounts assessed through the end of the period.

Foreign currency remeasurement and translation

Foreign currency remeasurement and translation

The functional currency for each of our foreign operations is generally the currency of the local operating environment. Transactions in currencies other than a foreign operation's functional currency are remeasured into the functional currency and the resulting foreign exchange gains and losses are reflected in Net realized gains (losses) in the consolidated statements of operations. Functional currency assets and liabilities are translated into the reporting currency, U.S. dollars, using period end exchange rates and the related translation adjustments are recorded as a separate component of AOCI. Functional statement of operations amounts expressed in functional currencies are translated using average exchange rates.

Administrative expenses

Administrative expenses

Administrative expenses generally include all operating costs other than policy acquisition costs. The Insurance – North American P&C segment manages and uses an in-house third-party claims administrator, ESIS Inc. (ESIS).  ESIS performs claims management and risk control services for domestic and international organizations that self-insure P&C exposures as well as internal P&C exposures.  The net operating results of ESIS are included within Administrative expenses in the consolidated statements of operations and were $30 million, $27 million, and $25 million for the years ended December 31, 2015, 2014, and 2013, respectively.

Income taxes

Income taxes

Income taxes have been recorded related to those operations subject to income taxes. Deferred tax assets and liabilities result from temporary differences between the amounts recorded in the consolidated financial statements and the tax basis of our assets and liabilities. Refer to Note 8 for additional information. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. A valuation allowance against deferred tax assets is recorded if it is more likely than not that all, or some portion, of the benefits related to deferred tax assets will not be realized. The valuation allowance assessment considers tax planning strategies, where applicable.

We recognize uncertain tax positions deemed more likely than not of being sustained upon examination.  Recognized income tax positions are measured at the largest amount that is greater than 50 percent likely of being realized. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs.

Earnings per share

Earnings per share

Basic earnings per share is calculated using the weighted-average shares outstanding including participating securities with non-forfeitable rights to dividends such as unvested restricted stock. All potentially dilutive securities including stock options are excluded from the basic earnings per share calculation. In calculating diluted earnings per share, the weighted-average shares outstanding is increased to include all potentially dilutive securities. Basic and diluted earnings per share are calculated by dividing net income by the applicable weighted-average number of shares outstanding during the year.

Cash flow information

Cash flow information

Premiums received and losses paid associated with the GLB reinsurance products, which as discussed previously meet the definition of a derivative instrument for accounting purposes, are included within Cash flows from operating activities.  Cash flows, such as settlements and collateral requirements, associated with GLB and all other derivative instruments are included on a net basis within Cash flows from investing activities. Purchases, sales, and maturities of short-term investments are recorded on a net basis within Cash flows from investing activities.

Derivatives

Derivatives

Chubb recognizes all derivatives at fair value in the consolidated balance sheets and participates in derivative instruments in two principal ways:

(i)To sell protection to customers as an insurance or reinsurance contract that meets the definition of a derivative for accounting purposes. For 2015 and 2014, the reinsurance of GLBs was our primary product falling into this category; and

(ii)To mitigate financial risks, principally arising from investment holdings, products sold, or assets and liabilities held in foreign currencies. For these instruments, changes in assets or liabilities measured at fair value are recorded as realized gains or losses in the consolidated statement of operations.

We did not designate any derivatives as accounting hedges during 2015, 2014, or 2013.

Share-based compensation

Share-based compensation

Chubb measures and records compensation cost for all share-based payment awards at grant-date fair value. Compensation costs are recognized for share-based payment awards with only service conditions that have graded vesting schedules on a straight-line basis over the requisite service period for each separately vesting portion of the award as if the award was, in substance, multiple awards. Refer to Note 12 for additional information.

Accounting Pronouncements Not yet Adopted [Text Block]

Adopted in 2016

Presentation of Debt Issuance Costs

In April 2015, the FASB issued new guidance related to the accounting for debt issuance costs.  The new guidance requires presentation of debt issuance costs in the balance sheet as a deduction from the carrying amount of the related debt liability instead of a deferred charge.  The new guidance requires retrospective adoption and is effective for interim and annual reporting periods beginning after December 15, 2015, with early adoption permitted. Adoption of this guidance will require us to present debt issuance costs, currently recorded in Other assets on the consolidated balance sheets, within Long-term debt.This guidance, which became effective on January 1, 2016, did not have any effect on our results of operations and financial condition.

Accounting guidance not yet adopted

Revenue from Contracts with Customers

In May 2014, the FASB issued an accounting standard that supersedes most existing revenue recognition guidance. The standard excludes from its scope the accounting for insurance contracts, leases, financial instruments, and certain other agreements that are governed under other GAAP guidance, but could affect the revenue recognition for certain of our claims management and risk control services. The updated guidance requires an entity to recognize revenue as performance obligations are met, in order to reflect the transfer of promised goods or services to customers in an amount that reflects the consideration the entity is entitled to receive for those goods or services. The standard is effective for interim and annual reporting periods beginning after December 15, 2017 and may be applied retrospectively or through a cumulative effect adjustment to retained earnings at the date of adoption. Early adoption is permitted only as of annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. The adoption of this guidance is not expected to have a material impact on our financial condition or results of operations.

Short-Duration Contracts

In May 2015, the FASB issued guidance that requires additional disclosures for short-duration insurance contracts. New disclosure will be required to provide more information about initial claim estimates and subsequent adjustments to those estimates, the methodologies and judgments used to estimate claims, and the timing frequency, and severity of claims. The guidance is effective for public business entities for annual periods beginning after December 15, 2015 and interim periods within annual periods after December 15, 2016. The guidance requires a change in disclosure only and adoption of this guidance will have no impact on our financial condition or results of operations.

New Accounting Pronouncements, Policy [Policy Text Block]

Adopted in 2015

Business Combinations – Simplifying the Accounting for Measurement-Period Adjustments

In September 2015, the Financial Accounting Standards Board (FASB) issued guidance to simplify the accounting for adjustments made to provisional valuation amounts recognized in a business combination. The guidance requires that the acquirer must recognize adjustments to provisional valuation amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined.  The guidance eliminates the requirement to retrospectively account for such adjustments. Previously, the accounting for measurement-period adjustments required the acquirer to retrospectively adjust the provisional amounts recognized at the acquisition date with a corresponding adjustment to goodwill.  We early adopted this guidance effective July 1, 2015.  The adoption of this guidance did not have an impact on our financial condition or results of operations.

Disclosures for investments in certain entities that calculate net asset value (NAV)

In May 2015, the FASB issued guidance that eliminated the requirement for investments measured at fair value using NAV as a practical expedient to be categorized within the fair value hierarchy. We adopted this guidance early, effective July 1, 2015 and have retrospectively revised prior year fair value hierarchy disclosures contained in this report to conform to the current period presentation. Refer to Note 4 Fair Value Measurement for further information. This guidance requires a change in disclosure only and adoption of this guidance did not have an impact on our financial condition or results of operations.

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Investments (Tables)

12 Months Ended

Dec. 31, 2015

Dec. 31, 2014

Investments, Debt and Equity Securities [Abstract]

Schedule Of Amortized Cost And Fair Value Of Fixed Maturities And Related OTTI Recognized In AOCI

December 31, 2015	Amortized Cost		Gross Unrealized Appreciation		Gross Unrealized Depreciation			Fair Value		OTTI Recognized in AOCI
(in millions of U.S. dollars)
Available for sale
U.S. Treasury and agency	$	2,481	$	52	$	(5	)	$	2,528	$	—
Foreign	13,190		468		(213		)	13,445		(13		)
Corporate securities	15,028		355		(454		)	14,929		(28		)
Mortgage-backed securities	9,827		183		(52		)	9,958		(1		)
States, municipalities, and political subdivisions	2,623		110		(6		)	2,727		—
	$	43,149	$	1,168	$	(730	)	$	43,587	$	(42	)
Held to maturity
U.S. Treasury and agency	$	733	$	13	$	(1	)	$	745	$	—
Foreign	763		30		(8		)	785		—
Corporate securities	3,054		57		(55		)	3,056		—
Mortgage-backed securities	1,707		38		(2		)	1,743		—
States, municipalities, and political subdivisions	2,173		52		(2		)	2,223		—
	$	8,430	$	190	$	(68	)	$	8,552	$	—

December 31, 2014	Amortized Cost		Gross Unrealized Appreciation		Gross Unrealized Depreciation			Fair Value		OTTI Recognized in AOCI
(in millions of U.S. dollars)
Available for sale
U.S. Treasury and agency	$	2,741	$	87	$	(8	)	$	2,820	$	—
Foreign	14,703		629		(90		)	15,242		—
Corporate securities	16,897		704		(170		)	17,431		(7		)
Mortgage-backed securities	10,011		304		(29		)	10,286		(1		)
States, municipalities, and political subdivisions	3,474		147		(5		)	3,616		—
	$	47,826	$	1,871	$	(302	)	$	49,395	$	(8	)
Held to maturity
U.S. Treasury and agency	$	832	$	20	$	(2	)	$	850	$	—
Foreign	916		47		—			963		—
Corporate securities	2,323		102		(2		)	2,423		—
Mortgage-backed securities	1,983		57		(1		)	2,039		—
States, municipalities, and political subdivisions	1,277		40		(3		)	1,314		—
	$	7,331	$	266	$	(8	)	$	7,589	$	—

Schedule Of Fixed Maturities By Contractual Maturity

The following table presents fixed maturities by contractual maturity:

	December 31				December 31
			2015				2014
(in millions of U.S. dollars)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Available for sale
Due in 1 year or less	$	1,856	$	1,865	$	2,187	$	2,206
Due after 1 year through 5 years	14,936		15,104		15,444		15,857
Due after 5 years through 10 years	12,258		12,173		15,663		16,089
Due after 10 years	4,272		4,487		4,521		4,957
	33,322		33,629		37,815		39,109
Mortgage-backed securities	9,827		9,958		10,011		10,286
	$	43,149	$	43,587	$	47,826	$	49,395
Held to maturity
Due in 1 year or less	$	492	$	495	$	353	$	355
Due after 1 year through 5 years	2,443		2,517		2,603		2,693
Due after 5 years through 10 years	2,292		2,313		1,439		1,489
Due after 10 years	1,496		1,484		953		1,013
	6,723		6,809		5,348		5,550
Mortgage-backed securities	1,707		1,743		1,983		2,039
	$	8,430	$	8,552	$	7,331	$	7,589

Schedule Of Cost And Fair Value Of Equity Securities

	December 31			December 31
(in millions of U.S. dollars)	2015			2014
Cost	$	441		$	440
Gross unrealized appreciation	74			83
Gross unrealized depreciation	(18		)	(13		)
Fair value	$	497		$	510

Schedule Of Default Assumptions By Moody's Rating Category

The following table presents default assumptions by Moody's rating category (historical mean default rate provided for comparison):

Moody's Rating Category	1-in-100 Year Default Rate		Historical Mean Default Rate
Investment Grade:
Aaa-Baa	0.0-1.3%		0.0-0.3%
Below Investment Grade:
Ba	4.9	%	1.1	%
B	12.7	%	3.4	%
Caa-C	50.2	%	13.1	%

Schedule Of Net Realized Gains (Losses) And The Losses Included In Net Realized Gains (Losses) And OCI

The following table presents the Net realized gains (losses) and the losses included in Net realized gains (losses) and OCI as a result of conditions which caused us to conclude the decline in fair value of certain investments was “other-than-temporary” and the change in net unrealized appreciation (depreciation) of investments: 

	Year Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Fixed maturities:
OTTI on fixed maturities, gross	$	(142	)	$	(64	)	$	(18	)
OTTI on fixed maturities recognized in OCI (pre-tax)	39			7			—
OTTI on fixed maturities, net	(103		)	(57		)	(18		)
Gross realized gains excluding OTTI	158			213			237
Gross realized losses excluding OTTI	(235		)	(133		)	(129		)
Total fixed maturities	(180		)	23			90
Equity securities:
OTTI on equity securities	(7		)	(8		)	(2		)
Gross realized gains excluding OTTI	47			22			21
Gross realized losses excluding OTTI	(11		)	(61		)	(4		)
Total equity securities	29			(47		)	15
OTTI on other investments	(2		)	(3		)	(2		)
Foreign exchange gains (losses)	(80		)	(40		)	29
Investment and embedded derivative instruments	32			(107		)	78
Fair value adjustments on insurance derivative	(203		)	(217		)	878
S&P put options and futures	(10		)	(168		)	(579		)
Other derivative instruments	(12		)	50			(2		)
Other	6			2			(3		)
Net realized gains (losses)	(420		)	(507		)	504
Change in net unrealized appreciation (depreciation) on investments:
Fixed maturities available for sale	(1,119		)	734			(1,798		)
Fixed maturities held to maturity	43			(2		)	(82		)
Equity securities	(17		)	77			(41		)
Other	(36		)	35			54
Income tax (expense) benefit	152			(167		)	408
Change in net unrealized appreciation (depreciation) on investments	(977		)	677			(1,459		)
Total net realized gains (losses) and change in net unrealized appreciation (depreciation) on investments	$	(1,397	)	$	170		$	(955	)

Schedule Of Roll-Forward Of Pre-Tax Credit Losses Related To Fixed Maturities For Which A Portion Of OTTI Was Recognized In OCI

The following table presents a roll-forward of pre-tax credit losses related to fixed maturities for which a portion of OTTI was recognized in OCI: 

	Year Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Balance of credit losses related to securities still held – beginning of year	$	28		$	37		$	43
Additions where no OTTI was previously recorded	41			22			9
Additions where an OTTI was previously recorded	9			5			3
Reductions for securities sold during the period	(25		)	(36		)	(18		)
Balance of credit losses related to securities still held – end of year	$	53		$	28		$	37

Schedule Of Other Investments

			December 31				December 31
			2015				2014
(in millions of U.S. dollars)	Fair Value		Cost		Fair Value		Cost
Investment funds	$	269	$	138	$	378	$	228
Limited partnerships	709		542		691		497
Partially-owned investment companies	1,498		1,498		1,492		1,492
Life insurance policies	222		222		205		205
Policy loans	184		184		187		187
Trading securities	284		284		290		287
Other	125		125		103		103
Total	$	3,291	$	2,993	$	3,346	$	2,999

Schedule Of Partially Owned Insurance Companies

	December 31						December 31
	2015						2014
(in millions of U.S. dollars, except for percentages)	Carrying Value		Issued  Share Capital		Ownership Percentage		Carrying Value		Issued Share Capital		Ownership Percentage		Domicile
Huatai Group	$	430	$	624	20.0	%	$	397	$	638	20.0	%	China
Huatai Life Insurance Company	107		428		20.0	%	86		438		20.0	%	China
Freisenbruch-Meyer	9		5		40.0	%	9		5		40.0	%	Bermuda
ACE Cooperative Insurance Co. – Saudi Arabia	11		27		30.0	%	10		27		30.0	%	Saudi Arabia
Russian Reinsurance Company	2		4		23.3	%	2		4		23.3	%	Russia
ABR Reinsurance Ltd.	94		800		11.3	%	—		—		—		Bermuda
Total	$	653	$	1,888			$	504	$	1,112

Schedule Of Aggregate Fair Value And Gross Unrealized Loss By Length Of Time The Security Has Continuously Been In An Unrealized Loss Position

The following tables present, for all securities in an unrealized loss position (including securities on loan), the aggregate fair value and gross unrealized loss by length of time the security has continuously been in an unrealized loss position:

	0 – 12 Months					Over 12 Months					Total
December 31, 2015	Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss
(in millions of U.S. dollars)
U.S. Treasury and agency	$	996	$	(5	)	$	153	$	(1	)	$	1,149	$	(6	)
Foreign	3,953		(148		)	436		(73		)	4,389		(221		)
Corporate securities	7,518		(371		)	738		(138		)	8,256		(509		)
Mortgage-backed securities	3,399		(42		)	516		(12		)	3,915		(54		)
States, municipalities, and political subdivisions	556		(6		)	42		(2		)	598		(8		)
Total fixed maturities	16,422		(572		)	1,885		(226		)	18,307		(798		)
Equity securities	131		(18		)	—		—			131		(18		)
Other investments	210		(11		)	—		—			210		(11		)
Total	$	16,763	$	(601	)	$	1,885	$	(226	)	$	18,648	$	(827	)

	0 – 12 Months					Over 12 Months					Total
December 31, 2014	Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss
(in millions of U.S. dollars)
U.S. Treasury and agency	$	350	$	(1	)	$	666	$	(9	)	$	1,016	$	(10	)
Foreign	2,262		(75		)	375		(15		)	2,637		(90		)
Corporate securities	4,684		(150		)	738		(22		)	5,422		(172		)
Mortgage-backed securities	704		(2		)	1,663		(28		)	2,367		(30		)
States, municipalities, and political subdivisions	458		(3		)	490		(5		)	948		(8		)
Total fixed maturities	8,458		(231		)	3,932		(79		)	12,390		(310		)
Equity securities	101		(13		)	—		—			101		(13		)
Total	$	8,559	$	(244	)	$	3,932	$	(79	)	$	12,491	$	(323	)

Schedule Of Sources Of Net Investment Income

	Year Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Fixed maturities	$	2,157		$	2,199		$	2,093
Short-term investments	49			45			29
Equity securities	16			33			37
Other	86			94			105
Gross investment income	2,308			2,371			2,264
Investment expenses	(114		)	(119		)	(120		)
Net investment income	$	2,194		$	2,252		$	2,144

Schedule Of Components Of Restricted Assets

The following table presents the components of restricted assets: 

	December 31		December 31
(in millions of U.S. dollars)	2015		2014
Trust funds	$	11,862	$	10,838
Deposits with non-U.S. regulatory authorities	2,075		2,305
Assets pledged under repurchase agreements	1,459		1,431
Deposits with U.S. regulatory authorities	1,242		1,345
Other pledged assets	392		457
	$	17,030	$	16,376

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Fair value measurements (Tables)

12 Months Ended

Dec. 31, 2015

Fair Value Disclosures [Abstract]

GMIB Annuitization Experience [Table Text Block]

% of total GMIB guaranteed value	Year of GMIB eligibility	Maximum annuitization rate(s) (per year)	Maximum annuitization rates based on
68%	First year	7% - 55%	Actual Experience
	Subsequent years	5% - 27%
4%	First year	18%	Actual Experience
	Subsequent years	5%, 10%, 27%	Weighted average(1)
28%	First year	7%, 15%, 55%	Weighted average(1)
	Subsequent years	5%, 10%, 27%

⁽¹⁾ Weighted average of three different annuitization rates (with heavier weighting on credible experience from other clients when own experience is less credible)

Financial Instruments Measured At Fair Value On A Recurring Basis

Financial instruments measured at fair value on a recurring basis, by valuation hierarchy 

December 31, 2015	Level 1		Level 2		Level 3		Total
(in millions of U.S. dollars)
Assets:
Fixed maturities available for sale
U.S. Treasury and agency	$	1,712	$	816	$	—	$	2,528
Foreign	—		13,388		57		13,445
Corporate securities	—		14,755		174		14,929
Mortgage-backed securities	—		9,905		53		9,958
States, municipalities, and political subdivisions	—		2,727		—		2,727
	1,712		41,591		284		43,587
Equity securities	481		—		16		497
Short-term investments	7,171		3,275		—		10,446
Other investments(1)	347		230		212		789
Securities lending collateral	—		1,046		—		1,046
Investment derivative instruments	12		—		—		12
Separate account assets	1,464		88		—		1,552
Total assets measured at fair value(1)	$	11,187	$	46,230	$	512	$	57,929
Liabilities:
Investment derivative instruments	$	13	$	—	$	—	$	13
Other derivative instruments	4		—		6		10
GLB(2)	—		—		609		609
Total liabilities measured at fair value	$	17	$	—	$	615	$	632

⁽¹⁾  Excluded from the table above are partially-owned investments, investment funds, and limited partnerships of $2,477 million and other investments of $25 million at December 31, 2015 measured using NAV. Based on new accounting guidance adopted in 2015, these investments are excluded from the hierarchy table.

⁽²⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the consolidated balance sheets. Refer to Note 5c) for additional information.

December 31, 2014	Level 1		Level 2		Level 3		Total
(in millions of U.S. dollars)
Assets:
Fixed maturities available for sale
U.S. Treasury and agency	$	1,680	$	1,140	$	—	$	2,820
Foreign	—		15,220		22		15,242
Corporate securities	—		17,244		187		17,431
Mortgage-backed securities	—		10,271		15		10,286
States, municipalities, and political subdivisions	—		3,616		—		3,616
	1,680		47,491		224		49,395
Equity securities	492		16		2		510
Short-term investments	1,183		1,139		—		2,322
Other investments(1)	370		211		204		785
Securities lending collateral	—		1,330		—		1,330
Investment derivative instruments	18		—		—		18
Other derivative instruments	—		2		—		2
Separate account assets	1,400		90		—		1,490
Total assets measured at fair value(1)	$	5,143	$	50,279	$	430	$	55,852
Liabilities:
Investment derivative instruments	$	36	$	—	$	—	$	36
Other derivative instruments	21		—		4		25
GLB(2)	—		—		406		406
Total liabilities measured at fair value	$	57	$	—	$	410	$	467

⁽¹⁾  Excluded from the table above are partially-owned investments, investment funds, and limited partnerships of$2,561 million at December 31, 2014 measured using NAV. Based on new accounting guidance adopted in 2015, these investments are excluded from the hierarchy table.

⁽²⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the consolidated balance sheets. Refer to Note 5c) for additional information.

Fair Value And Maximum Future Funding Commitments Related To Investments

The following table presents, by investment category, the expected liquidation period, fair value, and maximum future funding commitments of alternative investments: 

		December 31				December 31
		2015				2014
(in millions of U.S. dollars)	Expected Liquidation Period of Underlying Assets	Fair Value		Maximum Future Funding Commitments		Fair Value		Maximum Future Funding Commitments
Financial	5 to 9 Years	$	300	$	105	$	282	$	145
Real Assets	3 to 7 Years	474		140		451		210
Distressed	5 to 9 Years	261		218		232		175
Private Credit	3 to 7 Years	265		209		299		190
Traditional	3 to 9 Years	895		152		895		285
Vintage	1 to 2 Years	13		—		24		5
Investment funds	Not Applicable	269		—		378		—
		$	2,477	$	824	$	2,561	$	1,010

Schedule Of Significant Unobservable Inputs Used In Level 3 Liability Valuations

The following table presents the significant unobservable inputs used in the Level 3 liability valuations. Excluded from the table below are inputs used to determine the fair value of Level 3 assets which are based on single broker quotes and contain no quantitative unobservable inputs developed by management.

(in millions of U.S. dollars, except for percentages)	Fair Value at December 31, 2015		Valuation Technique	Significant Unobservable Inputs	Ranges
GLB(1)	$	609	Actuarial model	Lapse rate	1% – 30%
				Annuitization rate	0% – 55%

⁽¹⁾  Discussion of the most significant inputs used in the fair value measurement of GLB and the sensitivity of those assumptions is included within Note 4 a) Guaranteed living benefits.

Financial Instruments Measured At Fair Value Using Significant Unobservable Inputs

The following tables present a reconciliation of the beginning and ending balances of financial instruments measured at fair value using significant unobservable inputs (Level 3): 

														Assets					Liabilities
	Available-for-Sale Debt Securities										Equity securities			Other investments			Other derivative instruments		GLB(1)
Year Ended December 31, 2015		Foreign			Corporate securities			MBS
(in millions of U.S. dollars)
Balance, beginning of year		$	22		$	187		$	15		$	2		$	204		$	4	$	406
Transfers into Level 3		34			16			—			—			—			—		—
Change in Net Unrealized Gains (Losses) included in OCI		(2		)	(1		)	—			3			(6		)	—		—
Net Realized Gains/Losses		(1		)	(4		)	—			(2		)	—			2		203
Purchases		15			52			41			13			33			—		—
Sales		(3		)	(28		)	(2		)	—			—			—		—
Settlements		(8		)	(48		)	(1		)	—			(19		)	—		—
Balance, end of year		$	57		$	174		$	53		$	16		$	212		$	6	$	609
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date		$	(1	)	$	(2	)	$	—		$	(2	)	$	—		$	2	$	203

⁽¹⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the consolidated balance sheets. Refer to Note 5c) for additional information.

	Assets																					Liabilities
	Available-for-Sale Debt Securities										Equity securities			Short-term investments			Other investments			Other derivative instruments		GLB(1)
Year ended December 31, 2014		Foreign			Corporate securities			MBS
(in millions of U.S. dollars)
Balance, beginning of year		$	44		$	166		$	8		$	4		$	7		$	196		$	—	$	193
Transfers into Level 3		10			37			—			—			—			—			2		—
Transfers out of Level 3		(34		)	(23		)	—			(2		)	(7		)	—			—		—
Change in Net Unrealized Gains (Losses) included in OCI		(1		)	(1		)	—			—			—			(1		)	—		—
Net Realized Gains/Losses		(3		)	(5		)	—			—			—			—			2		213
Purchases		15			73			8			2			—			20			—		—
Sales		(4		)	(38		)	—			(2		)	—			—			—		—
Settlements		(5		)	(22		)	(1		)	—			—			(11		)	—		—
Balance, end of year		$	22		$	187		$	15		$	2		$	—		$	204		$	4	$	406
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date		$	(4	)	$	(5	)	$	—		$	—		$	—		$	—		$	2	$	213

⁽¹⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the consolidated balance sheets. The liability for GLB reinsurance was $663 million at December 31, 2014 and $427 million at December 31, 2013, which includes a fair value derivative adjustment of $406 million and $193 million, respectively. 

	Assets																		Liabilities
	Available-for-Sale Debt Securities																		GLB(1)
Year ended December 31, 2013	Foreign			Corporate securities			MBS			Equity securities			Short term investments			Other investments
(in millions of U.S. dollars)
Balance, beginning of year	$	60		$	102		$	13		$	3		$	—		$	180		$	1,119
Transfers into Level 3	36			47			—			8			8			—			—
Transfers out of Level 3	(54		)	(31		)	—			(1		)	(2		)	—			—
Change in Net Unrealized Gains (Losses) included in OCI	—			—			—			(6		)	—			(2		)	—
Net Realized Gains/Losses	1			(2		)	—			4			—			—			(926		)
Purchases	24			75			—			2			3			29			—
Sales	(21		)	(7		)	(3		)	(6		)	(1		)	—			—
Settlements	(2		)	(18		)	(2		)	—			(1		)	(11		)	—
Balance, end of year	$	44		$	166		$	8		$	4		$	7		$	196		$	193
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date	$	—		$	(2	)	$	—		$	—		$	—		$	—		$	(926	)

⁽¹⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the consolidated balance sheets. The liability for GLB reinsurance was $427 million at December 31, 2013 and $1.4 billion at December 31, 2012, which includes a fair value derivative adjustment of $193 million and $1.1 billion, respectively. 

Carrying Values And Fair Values Of Financial Instruments Not Measured At Fair Value

December 31, 2015	Fair Value								Carrying Value
(in millions of U.S. dollars)	Level 1		Level 2		Level 3		Total
Assets:
Fixed maturities held to maturity
U.S. Treasury and agency	$	583	$	162	$	—	$	745	$	733
Foreign	—		785		—		785		763
Corporate securities	—		3,042		14		3,056		3,054
Mortgage-backed securities	—		1,743		—		1,743		1,707
States, municipalities, and political subdivisions	—		2,223		—		2,223		2,173
Total assets	$	583	$	7,955	$	14	$	8,552	$	8,430
Liabilities:
Repurchase agreements	$	—	$	1,404	$	—	$	1,404	$	1,404
Long-term debt	—		9,678		—		9,678		9,447
Trust preferred securities	—		446		—		446		309
Total liabilities	$	—	$	11,528	$	—	$	11,528	$	11,160

December 31, 2014	Fair Value								Carrying Value
(in millions of U.S. dollars)	Level 1		Level 2		Level 3		Total
Assets:
Fixed maturities held to maturity
U.S. Treasury and agency	$	659	$	191	$	—	$	850	$	832
Foreign	—		963		—		963		916
Corporate securities	—		2,408		15		2,423		2,323
Mortgage-backed securities	—		2,039		—		2,039		1,983
States, municipalities, and political subdivisions	—		1,314		—		1,314		1,277
Total assets	$	659	$	6,915	$	15	$	7,589	$	7,331
Liabilities:
Repurchase Agreements	$	—	$	1,402	$	—	$	1,402	$	1,402
Short-term debt	—		1,169		—		1,169		1,150
Long-term debt	—		3,690		—		3,690		3,357
Trust preferred securities	—		462		—		462		309
Total liabilities	$	—	$	6,723	$	—	$	6,723	$	6,218

Schedule Of Fair Value Transfers Between Level 1 and Level 2 [Table Text Block]

			Year Ended December 31
(in millions of U.S. dollars)	2015		2014		2013
Transfers from Level 1 to Level 2	$	—	$	189	$	19
Transfers from Level 2 to Level 1	$	—	$	—	$	—

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Reinsurance (Tables)

12 Months Ended

Dec. 31, 2015

Reinsurance Disclosures [Abstract]

Schedule of direct, assumed and ceded premiums

The following table presents direct, assumed, and ceded premiums:

	Year Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Premiums written
Direct	$	19,879		$	20,069		$	19,212
Assumed		3,932			3,321			3,616
Ceded		(6,098	)		(5,591	)		(5,803	)
Net	$	17,713		$	17,799		$	17,025
Premiums earned
Direct	$	19,355		$	19,555		$	18,856
Assumed		3,676			3,336			3,479
Ceded		(5,818	)		(5,465	)		(5,722	)
Net	$	17,213		$	17,426		$	16,613

Schedule of reinsurance recoverable on losses and loss expenses

	December 31			December 31
(in millions of U.S. dollars)	2015			2014
Reinsurance recoverable on unpaid losses and loss expenses (1)		$	10,741		$	11,307
Reinsurance recoverable on paid losses and loss expenses (1)		645			685
Net reinsurance recoverable on losses and loss expenses		$	11,386		$	11,992

Schedule of reinsurance recoverable and provision by category of reinsurer

December 31, 2015	Gross Reinsurance Recoverable on Loss and Loss Expenses		Provision for Uncollectible Reinsurance		% of Gross Reinsurance Recoverable
(in millions of U.S. dollars, except for percentages)
Categories
Largest reinsurers	$	5,335	$	69	1.3	%
Other reinsurers rated A- or better	3,078		44		1.4	%
Other reinsurers with ratings lower than A- or not rated	378		68		18.0	%
Pools	347		14		4.0	%
Structured settlements	546		10		1.8	%
Captives	1,786		23		1.3	%
Other	244		100		41.0	%
Total	$	11,714	$	328	2.8	%

Schedule of income and expenses relating to GMDB and GLB reinsurance

	Year Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
GMDB
Net premiums earned	$	61		$	71		$	77
Policy benefits and other reserve adjustments	$	34		$	50		$	73
GLB
Net premiums earned	$	121		$	138		$	149
Policy benefits and other reserve adjustments	45			36			27
Net realized gains (losses)	(203		)	(213		)	929
Gain (loss) recognized in Net income	$	(127	)	$	(111	)	$	1,051
Net cash received	$	98		$	125		$	126
Net (increase) decrease in liability	$	(225	)	$	(236	)	$	925

Schedule of Net Amount of Risk and 100 Percent Mortality [Table Text Block]

(in millions of U.S. dollars, except for percentages)		Net amount at risk
Reinsurance covering		2015		2014		2015 Future claims discount rate	Other assumptions	Total claims at 100% mortality at December 31, 2015(1)
GMDB Risk Only		$	364	$	418	3.8% - 4.3%	No lapses or withdrawals	$	229
							Mortality according to 100% of the Annuity 2000 mortality table
GLB Risk Only		$	733	$	440	4.5% - 5.0%	No deaths, lapses or withdrawals	N/A
							Annuitization at a frequency most disadvantageous to Chubb(2)
							Claim calculated using interest rates in line with rates used to calculate reserve
Both Risks: (3)	GMDB	$	89	$	76	4.5% - 5.0%	No lapses or withdrawals	$	56
							Mortality according to 100% of the Annuity 2000 mortality table
	GLB	$	422	$	235	4.5% - 5.0%	Annuitization at a frequency most disadvantageous to Chubb(2)	$	—
							Claim calculated using interest rates in line with rates used to calculate reserve

⁽¹⁾ Takes into account all applicable reinsurance treaty claim limits.

⁽²⁾ Annuitization at a level that maximizes claims taking into account the treaty limits.

⁽³⁾ Covering both the GMDB and GLB risks on the same underlying policyholders.

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Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill roll-forward by business segment

The following table presents a roll-forward of Goodwill by segment:

(in millions of U.S. dollars)	Insurance – North American P&C			Insurance – North American Agriculture		Insurance – Overseas General			Global Reinsurance		Life			ACE Consolidated
Balance at December 31, 2013	$	1,215		$	134	$	2,054		$	365	$	835		$	4,603
Purchase price allocation adjustment	—			—		4			—		—			4
Acquisition of Samaggi	—			—		46			—		—			46
Acquisition of Itaú Seguros	—			—		449			—		—			449
Foreign exchange revaluation and other	(4		)	—		(187		)	—		(7		)	(198		)
Balance at December 31, 2014	$	1,211		$	134	$	2,366		$	365	$	828		$	4,904
Purchase price allocation adjustment	—			—		(4		)	—		—			(4		)
Acquisition of Fireman's Fund	196			—		—			—		—			196
Foreign exchange revaluation and other	(8		)	—		(284		)	—		(8		)	(300		)
Balance at December 31, 2015	$	1,399		$	134	$	2,078		$	365	$	820		$	4,796

Schedule of VOBA roll-foward

The following table presents a roll-forward of VOBA:

(in millions of U.S. dollars)	2015			2014			2013
Balance, beginning of year	$	466		$	536		$	614
Amortization expense	(42		)	(51		)	(64		)
Foreign exchange revaluation	(29		)	(19		)	(14		)
Balance, end of year	$	395		$	466		$	536

Schedule of estimated amortization expense related to VOBA

The following table presents, as of December 31, 2015, the estimated pre-tax amortization expense related to other intangible assets and VOBA for the next five years.

For the Year Ending December 31	Other intangible assets		VOBA
(in millions of U.S. dollars)
2016	$	88	$	39
2017	78		35
2018	70		32
2019	63		27
2020	58		24
Total	$	357	$	157

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Unpaid losses and loss expenses (Tables)

12 Months Ended

Dec. 31, 2015

Unpaid Losses And Loss Expenses [Abstract]

Schedule Of Unpaid Losses And Loss Expenses Roll Forward

The following table presents a reconciliation of unpaid losses and loss expenses:

	Years Ended December 31
(in millions of U.S. dollars)	2015				2014				2013
Gross unpaid losses and loss expenses, beginning of year		$	38,315			$	37,443			$	37,946
Reinsurance recoverable on unpaid losses(1)		(11,307		)		(10,612		)		(11,399		)
Net unpaid losses and loss expenses, beginning of year		27,008				26,831				26,547
Acquisition of subsidiaries		417				320				86
Total		27,425				27,151				26,633
Net losses and loss expenses incurred in respect of losses occurring in:
Current year		10,030				10,176				9,878
Prior years		(546		)		(527		)		(530		)
Total		9,484				9,649				9,348
Net losses and loss expenses paid in respect of losses occurring in:
Current year		4,053				3,975				3,942
Prior years		5,612				5,260				5,035
Total		9,665				9,235				8,977
Foreign currency revaluation and other		(682		)		(557		)		(173		)
Net unpaid losses and loss expenses, end of year		26,562				27,008				26,831
Reinsurance recoverable on unpaid losses(1)		10,741				11,307				10,612
Gross unpaid losses and loss expenses, end of year		$	37,303			$	38,315			$	37,443
(1) Net of provision for uncollectible reinsurance.

Schedule Of Asbestos Environmental Loss Roll Forward

	Asbestos						Environmental						Total
(in millions of U.S. dollars)	Gross			Net			Gross			Net			Gross			Net
Balance at December 31, 2014	$	1,500		$	892		$	199		$	149		$	1,699		$	1,041
Incurred activity	125			76			118			86			243			162			(1)
Paid activity	(274		)	(137		)	(118		)	(86		)	(392		)	(223		)
Balance at December 31, 2015	$	1,351		$	831		$	199		$	149		$	1,550		$	980

⁽¹⁾ Excludes unallocated loss expenses and the net activity reflects third-party reinsurance other than the aggregate excess of loss reinsurance provided by National Indemnity Company (NICO) to Westchester Specialty (see Westchester Specialty section below).

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Taxation (Tables)

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

Schedule of components of income tax provision

The following table presents the provision for income taxes:

	Years Ended December 31
(in millions of U.S. dollars)	2015		2014		2013
Current tax expense	$	304	$	481	$	231
Deferred tax expense	158		153		249
Provision for income taxes	$	462	$	634	$	480

Reconciliation schedule of the difference between the provision for income taxes and the expected tax provision at the Swiss statutory income tax rate

The following table presents a reconciliation of the difference between the provision for income taxes and the expected tax provision at the Swiss statutory income tax rate:

	Years Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Expected tax provision at Swiss statutory tax rate	$	258		$	273		$	331
Permanent differences:
Taxes on earnings subject to rate other than Swiss statutory rate	193			224			124
Change to deferred taxes related to unrealized foreign exchange losses (1)	—			139			—
Tax-exempt interest and dividends received deduction, net of proration	(32		)	(33		)	(27		)
Net withholding taxes	35			33			27
Change in valuation allowance (1)	2			(20		)	4
Other	6			18			21
Total provision for income taxes	$	462		$	634		$	480

⁽¹⁾ 2014 includes a charge to deferred taxes related to non-recognition of foreign tax credits related to unrealized foreign exchange losses.

Schedule of the components of net deferred tax assets

The following table presents the components of the net deferred tax assets:

	December 31		December 31
(in millions of U.S. dollars)	2015		2014
Deferred tax assets:
Loss reserve discount	$	663	$	794
Unearned premiums reserve	190		99
Foreign tax credits	969		1,103
Investments	29		9
Provision for uncollectible balances	65		81
Loss carry-forwards	72		40
Compensation related amounts	189		185
Other	65		—
Total deferred tax assets	2,242		2,311
Deferred tax liabilities:
Deferred policy acquisition costs	412		213
VOBA and other intangible assets	384		321
Un-remitted foreign earnings	827		939
Unrealized appreciation on investments	195		406
Depreciation	68		77
Other	—		43
Total deferred tax liabilities	1,886		1,999
Valuation allowance	38		17
Net deferred tax assets	$	318	$	295

Reconciliation schedule of unrecognized tax benefits

The following table presents a reconciliation of the beginning and ending amount of gross unrecognized tax benefits:

	December 31			December 31
(in millions of U.S. dollars)	2015			2014
Balance, beginning of year	$	23		$	27
Additions based on tax provisions related to the current year	1			2
Reductions for tax positions of prior years	(7		)	—
Reductions for the lapse of the applicable statutes of limitations	(1		)	(6		)
Balance, end of year	$	16		$	23

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Debt (Tables)

12 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Schedule of debt outstanding

	December 31		December 31
(in millions of U.S. dollars)	2015		2014		Early Redemption Option
Repurchase agreements (weighted average interest rate of 0.6% in 2015 and 0.3% in 2014)	$	1,404	$	1,402	None
Short-term debt
ACE INA senior notes:
$450 million 5.6% due May 2015	$	—	$	450	Make-whole premium plus 0.35%
$700 million 2.6% due November 2015	—		700		Make-whole premium plus 0.20%
Total short-term debt	$	—	$	1,150
Long-term debt
ACE INA senior notes:
$500 million 5.7% due February 2017	$	500	$	500	Make-whole premium plus 0.20%
$300 million 5.8% due March 2018	300		300		Make-whole premium plus 0.35%
$500 million 5.9% due June 2019	500		500		Make-whole premium plus 0.40%
$1,300 million 2.3% due November 2020	1,299		—		Make-whole premium plus 0.15%
$1,000 million 2.875% due November 2022	999		—		Make-whole premium plus 0.20%
$475 million 2.7% due March 2023	474		474		Make-whole premium plus 0.10%
$700 million 3.35% due May 2024	699		699		Make-whole premium plus 0.15%
$800 million 3.15% due March 2025	800		—		Make-whole premium plus 0.15%
$1,500 million 3.35% due May 2026	1,496		—		Make-whole premium plus 0.20%
$300 million 6.7% due May 2036	299		299		Make-whole premium plus 0.20%
$475 million 4.15% due March 2043	474		474		Make-whole premium plus 0.15%
$1,500 million 4.35% due November 2045	1,496		—		Make-whole premium plus 0.25%
ACE INA $100 million 8.875% debentures due August 2029	100		100		None
Other long-term debt (2.75% to 7.1% due December 2019 to September 2020)	11		11		None
Total long-term debt	$	9,447	$	3,357
Trust preferred securities
ACE INA capital securities due April 2030	$	309	$	309	Redemption price(1)

⁽¹⁾  Redemption price is equal to accrued and unpaid interest to the redemption date plus the greater of (i) 100 percent of the principal amount thereof, or (ii) sum of present value of scheduled payments of principal and interest on the debentures from the redemption date to April 1, 2030.

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Commitments, contingencies, and guarantees (Tables)

12 Months Ended

Dec. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Balance Sheet Locations, Fair Values In An Asset Or (Liability) Position, And Notional Values/Payment Provisions Of Derivative Instruments

and notional values/payment provisions of our derivative instruments: 

		December 31, 2015							December 31, 2014
	Consolidated Balance Sheet Location	Fair Value					Notional Value/ Payment Provision		Fair Value					Notional Value/ Payment Provision
		Derivative Asset		Derivative (Liability)					Derivative Asset		Derivative (Liability)
(in millions of U.S. dollars)
Investment and embedded derivative instruments
Foreign currency forward contracts	OA / (AP)	$	7	$	(11	)	$	1,029	$	12	$	(7	)	$	1,329
Cross-currency swaps	OA / (AP)	—		—			95		—		—			95
Futures contracts on money market instruments	OA / (AP)	—		—			—		—		—			2,467
Options/Futures contracts on notes and bonds	OA / (AP)	5		(2		)	751		6		(29		)	1,636
Convertible securities(1)	FM AFS/ES	31		—			40		291		—			267
		$	43	$	(13	)	$	1,915	$	309	$	(36	)	$	5,794
Other derivative instruments
Futures contracts on equities(2)	OA / (AP)	$	—	$	(4	)	$	1,197	$	—	$	(21	)	$	1,384
Options on equity market indices(2)	OA / (AP)	—		—			—		2		—			250
Other	OA / (AP)	—		(6		)	15		—		(4		)	10
		$	—	$	(10	)	$	1,212	$	2	$	(25	)	$	1,644
GLB(3)	(AP) / (FPB)	$	—	$	(888	)	$	1,155	$	—	$	(663	)	$	675

⁽¹⁾ Includes fair value of embedded derivatives.

⁽²⁾  Related to GMDB and GLB blocks of business.

⁽³⁾  Includes both future policy benefits reserves and fair value derivative adjustment. Refer to Note 5c) for additional information. Note that the payment provision related to GLB is the net amount at risk. The concept of a notional value does not apply to the GLB reinsurance contracts.

Net Realized Gains (Losses) Of Derivative Instrument Activity In Consolidated Statement Of Operations

	Years Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Investment and embedded derivative instruments
Foreign currency forward contracts	$	31		$	29		$	11
All other futures contracts and options	9			(118		)	61
Convertible securities(1)	(8		)	(18		)	6
Total investment and embedded derivative instruments	$	32		$	(107	)	$	78
GLB and other derivative instruments
GLB(2)	$	(203	)	$	(217	)	$	878
Futures contracts on equities(3)	(8		)	(164		)	(555		)
Options on equity market indices(3)	(2		)	(4		)	(24		)
Other	(12		)	50			(2		)
Total GLB and other derivative instruments	$	(225	)	$	(335	)	$	297
	$	(193	)	$	(442	)	$	375

⁽¹⁾  Includes embedded derivatives.

⁽²⁾ 

Schedule of Future Minimum Rental Payments for Operating Leases

Future minimum lease payments under the leases are expected to be as follows:

For the year ending December 31
(in millions of U.S. dollars)
2016	$	111
2017	93
2018	72
2019	54
2020	43
Thereafter	86
Total minimum future lease commitments	$	459

Secured Borrowings Repurchase Agreements Table Text Block

	Remaining contractual maturity
December 31, 2015	Overnight and Continuous
(in millions of U.S. dollars)
Collateral held under securities lending agreements:
Cash	$	424
U.S. Treasury and agency	67
Foreign	296
Corporate securities	2
Equity securities	257
	$	1,046
Gross amount of recognized liability for securities lending payable	$	1,047
Difference (1)	$	(1	)

⁽¹⁾  The carrying value of the securities lending collateral held is $1 million lower than the securities lending payable due to accrued interest recorded in the securities lending payable.

Secured Borrowings Securities Lending Table Text Block

	Remaining contractual maturity
December 31, 2015	Up to 30 Days		30 - 90 Days		Greater than 90 Days		Total
(in millions of U.S. dollars)
Collateral pledged under repurchase agreements:
Cash	$	34	$	—	$	—	$	34
U.S. Treasury and agency	6		—		231		237
Mortgage-backed securities	365		480		343		1,188
	$	405	$	480	$	574	$	1,459
Gross amount of recognized liabilities for repurchase agreements							$	1,404
Difference (1)							$	55

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Shareholders' equity (Tables)

12 Months Ended

Dec. 31, 2015

Stockholders' Equity Note [Abstract]

Share Repurchase Program [Table Text Block]

The following table presents repurchases of Chubb's Common Shares conducted in a series of open market transactions under the Board authorizations:

	Years Ended December 31
(in millions of U.S. dollars, except share data)	2015		2014		2013
Number of shares repurchased	6,677,663		13,982,358		3,266,531
Cost of shares repurchased	$	734	$	1,449	$	290

Dividends Declared [Table Text Block]

The following table presents dividend distributions per Common Share in Swiss francs (CHF) and U.S. dollars (USD):

	Years Ended December 31
		2015			2014			2013
	CHF	USD		CHF	USD		CHF	USD
Dividends - par value reduction	0.62	$	0.65	2.27	$	2.46	1.85	$	2.02
Dividends - distributed from capital contribution reserves	1.94	2.01		0.20	0.24		—	—
Total dividend distributions per common share	2.56	$	2.66	2.47	$	2.70	1.85	$	2.02

Schedule of changes in Common Shares issued and outstanding

	Years Ended December 31
	2015		2014		2013
Shares issued, beginning and end of year	342,832,412		342,832,412		342,832,412
Common Shares in treasury, end of year (at cost)	(18,268,971	)	(14,172,726	)	(3,038,477	)
Shares issued and outstanding, end of year	324,563,441		328,659,686		339,793,935
Common Shares issued to employee trust
Balance, beginning of year	(9,467	)	(9,467	)	(9,467	)
Shares redeemed	3,667		—		—
Balance, end of year	(5,800	)	(9,467	)	(9,467	)

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Share-based compensation (Tables)

12 Months Ended

Dec. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of pre-tax and after-tax share-based compensation expense

The following table presents pre-tax and after-tax share-based compensation expense:

	Years Ended December 31
(in millions of U.S. dollars)	2015		2014		2013
Stock options and shares issued under ESPP:
Pre-tax	$	31	$	28	$	24
After-tax (1)	$	21	$	19	$	18
Restricted stock:
Pre-tax	$	143	$	128	$	153
After-tax	$	84	$	75	$	89

⁽¹⁾  Excludes windfall tax benefit for share-based compensation recognized as a direct adjustment to Additional paid-in capital of $26 million, $28 million and $36 million for the years ended December 31, 2015, 2014 and 2013, respectively.

Schedule of the weighted-average model valuation assumptions

	Years Ended December 31
	2015		2014		2013
Dividend yield	2.3	%	2.7	%	2.4	%
Expected volatility	21.0	%	25.2	%	27.8	%
Risk-free interest rate	1.7	%	1.7	%	1.0	%
Expected life	5.8 years		5.8 years		5.8 years

Rollforward of the company's stock options

The following table presents a roll-forward of Chubb's stock options:

(Intrinsic Value in millions of U.S. dollars)	Number of Options		Weighted-Average Exercise Price		Weighted-Average Fair Value		Total Intrinsic Value
Options outstanding, December 31, 2012	9,449,659		$	55.03
Granted	1,821,063		$	85.41	$	17.29
Exercised	(1,658,671	)	$	48.17			$	70
Forfeited	(115,195	)	$	72.50
Options outstanding, December 31, 2013	9,496,856		$	61.84
Granted	1,782,903		$	96.77	$	18.00
Exercised	(1,511,948	)	$	54.84			$	73
Forfeited	(143,825	)	$	84.52
Options outstanding, December 31, 2014	9,623,986		$	69.06
Granted	1,892,641		$	114.78	$	18.49
Exercised	(1,457,580	)	$	60.88			$	72
Forfeited	(205,551	)	$	100.25
Options outstanding, December 31, 2015	9,853,496		$	78.40			$	379
Options exercisable, December 31, 2015	6,424,800		$	64.45			$	337

Rollforward of the company's restricted stock

The following table presents a roll-forward of our restricted stock awards. Included in the roll-forward below are 24,945 restricted stock awards, 25,339 restricted stock awards, and 20,969 restricted stock awards that were granted to non-management directors during the years ended December 31, 2015, 2014, and 2013, respectively:

	Service-based Restricted Stock Awards				Performance-based Restricted Stock Awards
	Number of Shares		Weighted-Average Grant-Date Fair Value		Number of Shares		Weighted-Average Grant-Date Fair Value
Unvested restricted stock, December 31, 2012	4,015,732		$	59.51	239,115		$	59.94
Granted	1,347,679		$	85.61	196,806		$	89.90
Vested	(1,715,414	)	$	54.97	(236,080	)	$	75.29
Forfeited	(136,307	)	$	67.68	(3,344	)	$	69.39
Unvested restricted stock, December 31, 2013	3,511,690		$	71.42	196,497		$	71.35
Granted	1,295,734		$	97.04	374,202		$	98.31
Vested	(1,468,894	)	$	68.00	(192,009	)	$	85.39
Forfeited	(145,012	)	$	81.73	—		$	—
Unvested restricted stock, December 31, 2014	3,193,518		$	82.91	378,690		$	90.87
Granted	1,124,143		$	114.28	326,860		$	113.29
Vested	(1,299,895	)	$	79.49	(110,340	)	$	98.70
Forfeited	(192,009	)	$	95.54	—		$	—
Unvested restricted stock, December 31, 2015	2,825,757		$	96.10	595,210		$	101.73

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Pension plans (Tables)

12 Months Ended

Dec. 31, 2015

Compensation and Retirement Disclosure [Abstract]

Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan [Table Text Block]

Components of the funded status of the pensions (included in Accounts payable, accrued expenses, and other liabilities in the consolidated balance sheets):

	December 31		December 31
(in millions of U.S. dollars)	2015		2014
Fair value of plan assets	$	573	$	588
Projected benefit obligation	569		594
Funded status, end of year	$	4	$	(6	)

Schedule of expected future benefit payments

Expected future payments are as follows:

For the year ending December 31
(in millions of U.S. dollars)
2016	$	20
2017	20
2018	23
2019	24
2020	24
2021–2025	126

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Other (income) expense (Tables)

12 Months Ended

Dec. 31, 2015

Other Income and Expenses [Abstract]

Schedule of the components of Other (income) expense

	Year Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Equity in net (income) loss of partially-owned entities	$	(113	)	$	(231	)	$	(119	)
(Gains) losses from fair value changes in separate account assets	19			(2		)	(16		)
Federal excise and capital taxes	19			20			24
Acquisition-related costs (1)	9			15			4
Other	15			8			27
Other (income) expense	$	(51	)	$	(190	)	$	(80	)

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Segment information (Tables)

12 Months Ended

Dec. 31, 2015

Segment Reporting [Abstract]

Operations By Segment

For the Year Ended December 31, 2015 (in millions of U.S. dollars)	Insurance – North American P&C			Insurance – North American Agriculture			Insurance – Overseas General			Global Reinsurance			Life			Corporate			Chubb Consolidated
Net premiums written	$	6,907		$	1,346		$	6,634		$	828		$	1,998		$	—		$	17,713
Net premiums earned	6,582			1,364			6,471			849			1,947			—			17,213
Losses and loss expenses	4,450			1,088			3,052			290			601			3			9,484
Policy benefits	—			—			—			—			543			—			543
Policy acquisition costs	600			69			1,581			214			476			1			2,941
Administrative expenses	748			1			997			49			291			184			2,270
Underwriting income (loss)	784			206			841			296			36			(188		)	1,975
Net investment income	1,056			23			534			300			265			16			2,194
Net realized gains (losses) including OTTI	(108		)	(8		)	(38		)	(32		)	(229		)	(5		)	(420		)
Interest expense	2			—			8			5			5			280			300
Other (income) expense:
(Gains) losses from fair value changes in separate account assets	—			—			—			—			19			—			19
Other	(29		)	1			(16		)	(6		)	(39		)	19			(70		)
Amortization of intangible assets	78			30			61			—			2			—			171
Chubb integration expenses	—			—			—			—			—			33			33
Income tax expense (benefit)	316			40			232			26			30			(182		)	462
Net income (loss)	$	1,365		$	150		$	1,052		$	539		$	55		$	(327	)	$	2,834

For the Year Ended December 31, 2014 (in millions of U.S. dollars)	Insurance – North American P&C			Insurance – North American Agriculture		Insurance – Overseas General			Global Reinsurance			Life			Corporate			Chubb Consolidated
Net premiums written	$	6,263		$	1,590	$	6,999		$	935		$	2,012		$	—		$	17,799
Net premiums earned	6,107			1,526		6,805			1,026			1,962			—			17,426
Losses and loss expenses	4,086			1,351		3,189			431			589			3			9,649
Policy benefits	—			—		—			—			517			—			517
Policy acquisition costs	634			81		1,625			257			478			—			3,075
Administrative expenses	678			9		1,026			54			285			193			2,245
Underwriting income (loss)	709			85		965			284			93			(196		)	1,940
Net investment income	1,085			26		545			316			268			12			2,252
Net realized gains (losses) including OTTI	(67		)	54		(78		)	(29		)	(383		)	(4		)	(507		)
Interest expense	9			—		6			4			11			250			280
Other (income) expense:
(Gains) losses from fair value changes in separate account assets	—			—		—			—			(2		)	—			(2		)
Other	(101		)	2		(63		)	(54		)	(1		)	29			(188		)
Amortization of intangible assets	—			31		74			—			3			—			108
Income tax expense (benefit)	306			33		378			38			46			(167		)	634
Net income (loss)	$	1,513		$	99	$	1,037		$	583		$	(79	)	$	(300	)	$	2,853

For the Year Ended December 31, 2013 (in millions of U.S. dollars)	Insurance – North American P&C			Insurance – North American Agriculture		Insurance – Overseas General			Global Reinsurance			Life			Corporate			Chubb Consolidated
Net premiums written	$	5,915		$	1,627	$	6,520		$	991		$	1,972		$	—		$	17,025
Net premiums earned	5,721			1,678		6,333			976			1,905			—			16,613
Losses and loss expenses	3,776			1,524		3,062			396			582			8			9,348
Policy benefits	—			—		—			—			515			—			515
Policy acquisition costs	597			53		1,453			197			358			1			2,659
Administrative expenses	601			11		1,008			50			343			198			2,211
Underwriting income (loss)	747			90		810			333			107			(207		)	1,880
Net investment income	1,021			26		539			280			251			27			2,144
Net realized gains (losses) including OTTI	72			1		18			53			360			—			504
Interest expense	5			1		5			5			15			244			275
Other (income) expense:
(Gains) losses from fair value changes in separate account assets	—			—		—			—			(16		)	—			(16		)
Other	(58		)	—		(21		)	(19		)	10			24			(64		)
Amortization of intangible assets	—			32		60			—			3			—			95
Income tax expense (benefit)	347			20		222			36			34			(179)			480
Net income (loss)	$	1,546		$	64	$	1,101		$	644		$	672		$	(269	)	$	3,758

Net Premiums Earned For Segment By Product

(in millions of U.S. dollars)	Property & All Other		Casualty		Life, Accident & Health		Chubb Consolidated
For the Year Ended December 31, 2015
Insurance – North American P&C	$	1,931	$	4,232	$	419	$	6,582
Insurance – North American Agriculture	1,364		—		—		1,364
Insurance – Overseas General	2,868		1,537		2,066		6,471
Global Reinsurance	423		426		—		849
Life	—		—		1,947		1,947
	$	6,586	$	6,195	$	4,432	$	17,213
For the Year Ended December 31, 2014
Insurance – North American P&C	$	1,662	$	4,032	$	413	$	6,107
Insurance – North American Agriculture	1,526		—		—		1,526
Insurance – Overseas General	2,948		1,573		2,284		6,805
Global Reinsurance	551		475		—		1,026
Life	—		—		1,962		1,962
	$	6,687	$	6,080	$	4,659	$	17,426
For the Year Ended December 31, 2013
Insurance – North American P&C	$	1,489	$	3,847	$	385	$	5,721
Insurance – North American Agriculture	1,678		—		—		1,678
Insurance – Overseas General	2,672		1,479		2,182		6,333
Global Reinsurance	543		433		—		976
Life	—		—		1,905		1,905
	$	6,382	$	5,759	$	4,472	$	16,613

Net Premiums Earned by Geographic Region

	North America				Asia  Pacific/Far East		Latin America
Years Ended December 31			Europe(1)
2015	60	%	15	%	15	%	10	%
2014	58	%	16	%	16	%	10	%
2013	58	%	17	%	16	%	9	%

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Earnings per share (Tables)

12 Months Ended

Dec. 31, 2015

Earnings Per Share [Abstract]

Schedule Of Earnings Per Share, Basic And Diluted

	Years Ended December 31
(in millions of U.S. dollars, except share and per share data)	2015		2014		2013
Numerator:
Net income	$	2,834	$	2,853	$	3,758
Denominator:
Denominator for basic earnings per share:
Weighted-average shares outstanding	325,589,361		335,609,899		340,906,490
Denominator for diluted earnings per share:
Share-based compensation plans	3,246,017		3,376,388		3,241,085
Weighted-average shares outstanding       and assumed conversions	328,835,378		338,986,287		344,147,575
Basic earnings per share	$	8.71	$	8.50	$	11.02
Diluted earnings per share	$	8.62	$	8.42	$	10.92
Potential anti-dilutive share conversions	1,601,668		1,024,788		1,031,297

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Statutory Financial Information (Tables)

12 Months Ended

Dec. 31, 2015

Statutory Financial Information [Abstract]

Schedule of combined statutory capital and surplus and statutory net income (loss)

	December 31
(in millions of U.S. dollars)	2015		2014
Statutory capital and surplus
Property and casualty	$	20,072	$	25,805
Life	$	1,216	$	1,463

	Year Ended December 31
(in millions of U.S. dollars)	2015			2014			2013
Statutory net income (loss)
Property and casualty	$	2,770		$	3,378		$	3,333
Life	$	(148	)	$	(248	)	$	409

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Information provided in connection with outstanding debt of subsidiaries (Tables)

12 Months Ended

Dec. 31, 2015

Information Provided In Connection With Outstanding Debt Of Subsidiaries [Abstract]

Condensed Consolidating Balance Sheet

ondensed Consolidating Balance Sheet at December 31, 2015

(in millions of U.S. dollars)	Chubb Limited (Parent Guarantor)		ACE INA Holdings Inc. (Subsidiary Issuer)		Other Chubb Limited Subsidiaries		Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
Assets
Investments	$	28	$	7,839	$	58,384	$	—		$	66,251
Cash(1)	1		2		2,743		(971		)	1,775
Insurance and reinsurance balances receivable	—		—		6,075		(752		)	5,323
Reinsurance recoverable on losses and loss expenses	—		—		20,124		(8,738		)	11,386
Reinsurance recoverable on policy benefits	—		—		1,129		(942		)	187
Value of business acquired	—		—		395		—			395
Goodwill and other intangible assets	—		—		5,683		—			5,683
Investments in subsidiaries	29,612		18,386		—		(47,998		)	—
Due from subsidiaries and affiliates, net	644		1,800		—		(2,444		)	—
Other assets	8		517		14,434		(3,593		)	11,366
Total assets	$	30,293	$	28,544	$	108,967	$	(65,438	)	$	102,366
Liabilities
Unpaid losses and loss expenses	$	—	$	—	$	45,490	$	(8,187	)	$	37,303
Unearned premiums	—		—		10,243		(1,804		)	8,439
Future policy benefits	—		—		5,749		(942		)	4,807
Due to subsidiaries and affiliates, net	—		—		2,444		(2,444		)	—
Affiliated notional cash pooling programs(1)	882		89		—		(971		)	—
Repurchase agreements	—		—		1,404		—			1,404
Long-term debt	—		9,436		11		—			9,447
Trust preferred securities	—		309		—		—			309
Other liabilities	276		1,422		12,916		(3,092		)	11,522
Total liabilities	1,158		11,256		78,257		(17,440		)	73,231
Total shareholders’ equity	29,135		17,288		30,710		(47,998		)	29,135
Total liabilities and shareholders’ equity	$	30,293	$	28,544	$	108,967	$	(65,438	)	$	102,366

⁽¹⁾  Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2015, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

Condensed Consolidating Balance Sheet at December 31, 2014

(in millions of U.S. dollars)	Chubb Limited (Parent Guarantor)		ACE INA Holdings Inc. (Subsidiary Issuer)		Other Chubb Limited Subsidiaries		Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
Assets
Investments	$	30	$	225	$	62,649	$	—		$	62,904
Cash(1)	—		1		1,209		(555		)	655
Insurance and reinsurance balances receivable	—		—		6,178		(752		)	5,426
Reinsurance recoverable on losses and loss expenses	—		—		20,992		(9,000		)	11,992
Reinsurance recoverable on policy benefits	—		—		1,194		(977		)	217
Value of business acquired	—		—		466		—			466
Goodwill and other intangible assets	—		—		5,724		—			5,724
Investments in subsidiaries	29,497		18,762		—		(48,259		)	—
Due from subsidiaries and affiliates, net	583		—		—		(583		)	—
Other assets	4		295		14,196		(3,631		)	10,864
Total assets	$	30,114	$	19,283	$	112,608	$	(63,757	)	$	98,248
Liabilities
Unpaid losses and loss expenses	$	—	$	—	$	46,770	$	(8,455	)	$	38,315
Unearned premiums	—		—		9,958		(1,736		)	8,222
Future policy benefits	—		—		5,731		(977		)	4,754
Due to subsidiaries and affiliates, net	—		422		161		(583		)	—
Affiliated notional cash pooling programs(1)	246		309		—		(555		)	—
Repurchase agreements	—		—		1,402		—			1,402
Short-term debt	—		1,150		—		—			1,150
Long-term debt	—		3,345		12		—			3,357
Trust preferred securities	—		309		—		—			309
Other liabilities	281		1,404		12,659		(3,192		)	11,152
Total liabilities	527		6,939		76,693		(15,498		)	68,661
Total shareholders’ equity	29,587		12,344		35,915		(48,259		)	29,587
Total liabilities and shareholders’ equity	$	30,114	$	19,283	$	112,608	$	(63,757	)	$	98,248

⁽¹⁾  Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2014, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

Condensed Consolidating Statement Of Operations and Comprehensive Income

Condensed Consolidating Statements of Operations and Comprehensive Income

For the Year Ended December 31, 2015	Chubb Limited (Parent Guarantor)			ACE INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net premiums written	$	—		$	—		$	17,713		$	—		$	17,713
Net premiums earned	—			—			17,213			—			17,213
Net investment income	3			4			2,187			—			2,194
Equity in earnings of subsidiaries	2,673			1,038			—			(3,711		)	—
Net realized gains (losses) including OTTI	—			(9		)	(411		)	—			(420		)
Losses and loss expenses	—			—			9,484			—			9,484
Policy benefits	—			—			543			—			543
Policy acquisition costs and administrative expenses	63			28			5,120			—			5,211
Interest (income) expense	(32		)	302			30			—			300
Other (income) expense	(208		)	(4		)	161			—			(51		)
Amortization of intangible assets	—			—			171			—			171
Chubb integration expenses	3			29			1			—			33
Income tax expense (benefit)	16			(349		)	795			—			462
Net income	$	2,834		$	1,027		$	2,684		$	(3,711	)	$	2,834
Comprehensive income (loss)	$	908		$	(192	)	$	757		$	(565	)	$	908

Condensed Consolidating Statements of Operations and Comprehensive Income

For the Year Ended December 31, 2014	Chubb Limited (Parent Guarantor)			ACE INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net premiums written	$	—		$	—		$	17,799		$	—		$	17,799
Net premiums earned	—			—			17,426			—			17,426
Net investment income	2			2			2,248			—			2,252
Equity in earnings of subsidiaries	2,707			791			—			(3,498		)	—
Net realized gains (losses) including OTTI	—			53			(560		)	—			(507		)
Losses and loss expenses	—			—			9,649			—			9,649
Policy benefits	—			—			517			—			517
Policy acquisition costs and administrative expenses	78			26			5,216			—			5,320
Interest (income) expense	(35		)	277			38			—			280
Other (income) expense	(201		)	27			(16		)	—			(190		)
Amortization of intangible assets	—			—			108			—			108
Income tax expense (benefit)	14			(94		)	714			—			634
Net income	$	2,853		$	610		$	2,888		$	(3,498	)	$	2,853
Comprehensive income	$	2,892		$	583		$	2,926		$	(3,509	)	$	2,892

Condensed Consolidating Statements of Operations and Comprehensive Income

For the Year Ended December 31, 2013	Chubb Limited (Parent Guarantor)			ACE INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries		Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net premiums written	$	—		$	—		$	17,025	$	—		$	17,025
Net premiums earned	—			—			16,613		—			16,613
Net investment income	2			3			2,139		—			2,144
Equity in earnings of subsidiaries	3,580			942			—		(4,522		)	—
Net realized gains (losses) including OTTI	—			(2		)	506		—			504
Losses and loss expenses	—			—			9,348		—			9,348
Policy benefits	—			—			515		—			515
Policy acquisition costs and administrative expenses	60			19			4,791		—			4,870
Interest (income) expense	(32		)	270			37		—			275
Other (income) expense	(221		)	27			114		—			(80		)
Amortization of intangible assets	—			—			95		—			95
Income tax expense (benefit)	17			(108		)	571		—			480
Net income	$	3,758		$	735		$	3,787	$	(4,522	)	$	3,758
Comprehensive income (loss)	$	2,023		$	(230	)	$	2,051	$	(1,821	)	$	2,023

Condensed Consolidating Statement of Cash Flows

Condensed Consolidating Statement of Cash Flows

For the Year Ended December 31, 2015	Chubb Limited (Parent Guarantor)			ACE INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net cash flows from operating activities	$	3,125		$	682		$	3,836		$	(3,779	)	$	3,864
Cash flows from investing activities
Purchases of fixed maturities available for sale	—			—			(16,053		)	(18		)	(16,071		)
Purchases of fixed maturities held to maturity	—			—			(62		)	—			(62		)
Purchases of equity securities	—			—			(158		)	—			(158		)
Sales of fixed maturities available for sale	—			—			10,814			—			10,814
Sales of equity securities	—			—			183			—			183
Maturities and redemptions of fixed maturities available for sale	—			—			6,567			—			6,567
Maturities and redemptions of fixed maturities held to maturity	—			—			669			—			669
Net change in short-term investments	—			(7,588		)	(628		)	—			(8,216		)
Net derivative instruments settlements	—			(9		)	(12		)	—			(21		)
Acquisition of subsidiaries (net of cash acquired of $629)	—			—			264			—			264
Capital contribution	(2,670		)	(625		)	(2,791		)	6,086			—
Other	—			(25		)	(256		)	18			(263		)
Net cash flows used for investing activities	(2,670		)	(8,247		)	(1,463		)	6,086			(6,294		)
Cash flows from financing activities
Dividends paid on Common Shares	(862		)	—			—			—			(862		)
Common Shares repurchased	—			—			(758		)	—			(758		)
Proceeds from issuance of long-term debt	—			6,090			—			—			6,090
Proceeds from issuance of repurchase agreements	—			—			2,029			—			2,029
Repayment of long-term debt	—			(1,150		)	—			—			(1,150		)
Repayment of repurchase agreements	—			—			(2,027		)	—			(2,027		)
Proceeds from share-based compensation plans, including windfall tax benefits	—			—			131			—			131
Advances (to) from affiliates	(228		)	95			133			—			—
Dividends to parent company	—			—			(3,779		)	3,779			—
Capital contribution	—			2,791			3,295			(6,086		)	—
Net proceeds from affiliated notional cash pooling programs(1)	636			(220		)	—			(416		)	—
Policyholder contract deposits	—			—			503			—			503
Policyholder contract withdrawals	—			—			(221		)	—			(221		)
Other	—			(40		)	—			—			(40		)
Net cash flows (used for) from financing activities	(454		)	7,566			(694		)	(2,723		)	3,695
Effect of foreign currency rate changes on cash and cash equivalents	—			—			(145		)	—			(145		)
Net (decrease) increase in cash	1			1			1,534			(416		)	1,120
Cash – beginning of year(1)	—			1			1,209			(555		)	655
Cash – end of year(1)	$	1		$	2		$	2,743		$	(971	)	$	1,775

⁽¹⁾  Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2015 and 2014, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

Condensed Consolidating Statement of Cash Flows

For the Year Ended December 31, 2014	Chubb Limited (Parent Guarantor)			ACE INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net cash flows from (used for) operating activities	$	541		$	210		$	4,419		$	(674	)	$	4,496
Cash flows from investing activities
Purchases of fixed maturities available for sale	—			—			(15,816		)	263			(15,553		)
Purchases of fixed maturities held to maturity	—			—			(267		)	—			(267		)
Purchases of equity securities	—			—			(251		)	—			(251		)
Sales of fixed maturities available for sale	—			—			7,750			(268		)	7,482
Sales of equity securities	—			—			670			—			670
Maturities and redemptions of fixed maturities available for sale	—			—			6,413			—			6,413
Maturities and redemptions of fixed maturities held to maturity	—			—			875			—			875
Net change in short-term investments	—			(216		)	(392		)	5			(603		)
Net derivative instruments settlements	—			53			(283		)	—			(230		)
Acquisition of subsidiaries (net of cash acquired of $20)	—			—			(766		)	—			(766		)
Capital contribution	—			(258		)	—			258			—
Other	—			(8		)	(266		)	—			(274		)
Net cash flows used for investing activities	—			(429		)	(2,333		)	258			(2,504		)
Cash flows from financing activities
Dividends paid on Common Shares	(862		)	—			—			—			(862		)
Common Shares repurchased	—			—			(1,429		)	—			(1,429		)
Proceeds from issuance of long-term debt	—			699			—			—			699
Proceeds from the issuance of repurchase agreements	—			—			1,978			—			1,978
Repayment of long-term debt	—			(500		)	(1		)	—			(501		)
Repayment of repurchase agreements	—			—			(1,977		)	—			(1,977		)
Proceeds from share-based compensation plans, including windfall tax benefits	—			—			127			—			127
Advances (to) from affiliates	260			(298		)	38			—			—
Dividends to parent company	—			—			(674		)	674			—
Capital contribution	—			—			258			(258		)	—
Net proceeds from (payments to) affiliated notional cash pooling programs(1)	61			309			—			(370		)	—
Policyholder contract deposits	—			—			366			—			366
Policyholder contract withdrawals	—			—			(172		)	—			(172		)
Other	—			(6		)	—			—			(6		)
Net cash flows (used for) from financing activities	(541		)	204			(1,486		)	46			(1,777		)
Effect of foreign currency rate changes on cash and cash equivalents	—			—			(139		)	—			(139		)
Net (decrease) increase in cash	—			(15		)	461			(370		)	76
Cash – beginning of year(1)	—			16			748			(185		)	579
Cash – end of year(1)	$	—		$	1		$	1,209		$	(555	)	$	655

⁽¹⁾ Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2014 and 2013, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

Condensed Consolidating Statement of Cash Flows

For the Year Ended December 31, 2013	Chubb Limited (Parent Guarantor)			ACE INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net cash flows from (used for) operating activities	$	970		$	(107	)	$	3,984		$	(825	)	$	4,022
Cash flows from investing activities
Purchases of fixed maturities available for sale	—			—			(21,504		)	106			(21,398		)
Purchases of fixed maturities held to maturity	—			—			(447		)	—			(447		)
Purchases of equity securities	—			—			(264		)	—			(264		)
Sales of fixed maturities available for sale	—			—			10,519			(106		)	10,413
Sales of equity securities	—			—			142			—			142
Maturities and redemptions of fixed maturities available for sale	—			—			6,941			—			6,941
Maturities and redemptions of fixed maturities held to maturity	—			—			1,488			—			1,488
Net change in short-term investments	(1		)	4			521			—			524
Net derivative instruments settlements	—			(1		)	(470		)	—			(471		)
Capital contribution	(133		)	(1,097		)	—			1,230			—
Acquisition of subsidiaries (net of cash acquired of $38)	—			—			(977		)	—			(977		)
Other	—			(4		)	(389		)	—			(393		)
Net cash flows used for investing activities	(134		)	(1,098		)	(4,440		)	1,230			(4,442		)
Cash flows from financing activities
Dividends paid on Common Shares	(517		)	—			—			—			(517		)
Common Shares repurchased	—			—			(287		)	—			(287		)
Proceeds from issuance of long-term debt	—			947			—						947
Proceeds from issuance of repurchase agreements	—			—			2,572			—			2,572
Repayment of repurchase agreements	—			—			(2,572		)	—			(2,572		)
Proceeds from share-based compensation plans, including windfall tax benefits	14			—			121			—			135
Advances from (to) affiliates	(621		)	621			—			—			—
Dividends to parent company	—			—			(825		)	825			—
Capital contribution	—			—			1,230			(1,230		)	—
Net proceeds from (payments to) affiliated notional cash pooling programs(1)	185			(349		)	—			164			—
Policyholder contract deposits	—			—			233			—			233
Policyholder contract withdrawals	—			—			(120		)	—			(120		)
Other	—			—			—			—			—
Net cash flows (used for) from financing activities	(939		)	1,219			352			(241		)	391
Effect of foreign currency rate changes on cash and cash equivalents	—			—			(7		)	—			(7		)
Net increase (decrease) in cash	(103		)	14			(111		)	164			(36		)
Cash – beginning of year(1)	103			2			859			(349		)	615
Cash – end of year(1)	$	—		$	16		$	748		$	(185	)	$	579

⁽¹⁾ Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2013 and 2012, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

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Condensed Unaudited Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Schedule of quarterly financial information

	Three Months Ended
	March 31			June 30		September 30			December 31
(in millions of U.S. dollars, except per share data)	2015			2015		2015			2015
Net premiums earned	$	3,927		$	4,360	$	4,719		$	4,207
Net investment income	551			562		549			532
Net realized gains (losses) including OTTI	(89		)	126		(397		)	(60		)
Total revenues	$	4,389		$	5,048	$	4,871		$	4,679
Losses and loss expenses	$	2,122		$	2,417	$	2,643		$	2,302
Policy benefits	$	142		$	153	$	89		$	159
Net income	$	681		$	942	$	528		$	683
Basic earnings per share	$	2.08		$	2.89	$	1.63		$	2.10
Diluted earnings per share	$	2.05		$	2.86	$	1.62		$	2.08

	Three Months Ended
	March 31			June 30			September 30			December 31
(in millions of U.S. dollars, except per share data)	2014			2014			2014			2014
Net premiums earned	$	3,970		$	4,332		$	4,754		$	4,370
Net investment income	553			556			566			577
Net realized gains (losses) including OTTI	(104		)	(73		)	(120		)	(210		)
Total revenues	$	4,419		$	4,815		$	5,200		$	4,737
Losses and loss expenses	$	2,161		$	2,388		$	2,684		$	2,416
Policy benefits	$	114		$	144		$	125		$	134
Net income (1)	$	734		$	779		$	785		$	555
Basic earnings per share	$	2.16		$	2.30		$	2.35		$	1.68
Diluted earnings per share	$	2.14		$	2.28		$	2.32		$	1.66

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Summary of significant accounting policies (Narrative) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Summary of significant accounting policies [Line Items]
Deferred Marketing Costs, Amortization Period	10 years
Deferred marketing costs reported in Deferred policy acquisition costs	$ 250	$ 288
Amortization expense for deferred marketing costs	$ 78	99	$ 128
Recoverable from unrated reinsurers, ceded reserve, default factor (percent)	34.00%
Reinsurance business assumed	$ 21	26
Percentage of fair value of loaned securities	102.00%
Maximum overdraft balance guaranteed by ACE Ltd	$ 300
Quality assessment threshold used in goodwill impairment testing	50.00%
Unpaid losses and loss expenses	$ 37,303	38,315	37,443	$ 37,946
Supplemental Information for Property, Casualty Insurance Underwriters, Reserves for Unpaid Claims and Claims Adjustment Expense	26,562	27,008	26,831
Gross liability for the amounts due to claimants	588
Reinsurance recoverables for amounts due from life insurance companies	546
Deposit assets reflected in Other assets	86	89
Reinsurance deposit liabilities included in Deposit liabilities	110	120
Contract holder deposit funds included in Deposit liabilities	1,100	908
Net operating results of ESIS included within Administrative expenses	30	27	$ 25
Structured settlements
Summary of significant accounting policies [Line Items]
Unpaid losses and loss expenses	42	49
Discounted Unsettled Claims [Member]
Summary of significant accounting policies [Line Items]
Unpaid losses and loss expenses	$ 50	$ 62
Minimum
Summary of significant accounting policies [Line Items]
Amortization period for value of reinsurance business assumed	9 years
Finite-lived intangible asset useful life	1 year
Interest rates used in calculating reserves	1.00%	1.00%
Reinsurance Premiums, Amortization Period	1 year
Maximum
Summary of significant accounting policies [Line Items]
Amortization period for value of reinsurance business assumed	40 years
Finite-lived intangible asset useful life	30 years
Interest rates used in calculating reserves	7.20%	6.50%
Reinsurance Premiums, Amortization Period	3 years

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Acquisitions (Detail) - USD ($) $ in Millions						1 Months Ended
	Jan. 14, 2016	Oct. 31, 2014	Jun. 17, 2014	May. 02, 2013	Jan. 03, 2013	Apr. 30, 2013	Dec. 31, 2015		Apr. 01, 2015	Dec. 31, 2014		Apr. 28, 2014	Dec. 31, 2013		Apr. 02, 2013	Dec. 31, 2012		Sep. 18, 2012
Business Acquisition [Line Items]
Cash							$ 1,775	[1],[2]		$ 655	[1],[3],[4]		$ 579	[3],[5]		$ 615	[5]
Insurance and reinsurance balances receivable							5,323			5,426
Common Shares							7,833			8,055
Goodwill generated in acquisitions							4,796			4,904			4,603
Unpaid losses and loss expenses							37,303			38,315			$ 37,443			$ 37,946
Unearned premiums							$ 8,439			$ 8,222
PT Asuransi Jaya Proteksi (JaPro)
Business Acquisition [Line Items]
Percentage of business acquired					20.00%													80.00%
Business Combination, Consideration Transferred					$ 107
Total ownership percentage acquired					100.00%
Fianzas Monterrey
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross						$ 293
Goodwill generated in acquisitions															$ 137
Other intangible assets generated in acquisition															73
Business Acquisition, Goodwill, Expected Tax Deductible Amount															$ 0
ABA Seguros
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross				$ 690
Goodwill generated in acquisitions				285
Other intangible assets generated in acquisition				140
Business Acquisition, Goodwill, Expected Tax Deductible Amount				$ 0
Large Corporate Property And Casualty Business Of Itau Seguros [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross		$ 606
Goodwill generated in acquisitions		445
Other intangible assets generated in acquisition		$ 60
The Siam Commercial Sammagi Insurance PCL (Samaggi)
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross			$ 176
Goodwill generated in acquisitions												$ 46
Other intangible assets generated in acquisition												$ 80
Total ownership percentage acquired			93.03%
Additional investment percentage to be acquired after tender offer			32.17%									60.86%
Fireman's Fund high net worth personal lines [Member]
Business Acquisition [Line Items]
Intangible Assets, Net (Excluding Goodwill)									$ 278
Cash									629
Insurance and reinsurance balances receivable									124
Fair Value of Assets Acquired									753
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities									863
Business Acquisition, Expected Financing Of Acquisition With Cash									365
Goodwill generated in acquisitions									196
Unpaid losses and loss expenses									417
Unearned premiums									$ 428
Subsequent Event [Member] | The Chubb Corporation [Member]
Business Acquisition [Line Items]
Business Acquisition, Expected Financing of Acquisition with Issuance of Senior Notes	$ 5,300
Business Combination, Consideration Transferred	29,500
Payments to Acquire Businesses, Gross	14,300
Common Shares	15,200
Business Acquisition, Expected Financing Of Acquisition With Cash	9,000
Attributed Value Equity Awards Assumed	$ 340

[1] Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2015 and 2014, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[2] Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2015, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[3] Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2014 and 2013, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[4] Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2014, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[5] Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2013 and 2012, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

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Investments (Narrative) (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) Security partnerships	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Mar. 27, 2015 USD ($)
Investment [Line Items]
Reinsurance recoverable on losses and loss expenses	$ 11,386	$ 11,992
Ceded Premiums Written	6,098	5,591	$ 5,803
Insurance and reinsurance balances payable	4,270	4,095
Fair value of securities transferred from AFS to HTM	1,900
Carrying Value	653	504
Net unrealized appreciation (depreciation) included in OCI	15	(4)
Net unrealized depreciation included in AOCI	35	(3)
Portion of gross unrealized loss represented by the United States Treasury and Agency obligations	$ 100
Company assumed recovery rate	32.00%
Moodys historical mean recovery rate	42.00%
Credit losses recognized in net income for corporate securities	$ 50	27	11
Credit losses recognized in net income for mortgage-backed securities	$ 0	0	$ 1
Limited partnerships number | partnerships	67
Trading securities - mutual funds	$ 257	261
Trading securities - equity securities	20	22
Trading securities - fixed maturities	$ 7	7
Number of fixed maturities in an unrealized loss position | Security	8,542
Total number of fixed maturities | Security	25,500
Largest single unrealized loss in the fixed maturities	$ (5)
Number of equity securities in an unrealized loss position | Security	90
Total number of equity securities | Security	250
Largest single unrealized loss in the equity securities	$ (2)
Restricted assets in fixed maturities and short-term investments	16,900	16,300
Restricted assets in cash	110	117
ABR Reinsurance Capital Holdings Ltd. [Member]
Investment [Line Items]
Warrants & Rights Outstanding				0.50%
Reinsurance recoverable on losses and loss expenses	82
Ceded Premiums Written	115
Fees and Commissions, Other	30
Insurance and reinsurance balances payable	6
Carrying Value	$ 94	$ 0		$ 90

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Investments (Schedule Of Amortized Cost And Fair Value Of Fixed Maturities And Related Other-Than-Temporary Impairment Recognized In Accumulated Other Comprehensive Income) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Investment [Line Items]
Document Period End Date	Dec. 31, 2015
Available for sale, Amortized Cost	$ 43,149	$ 47,826
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	1,168	1,871
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(730)	(302)
Available for sale, Fair Value	43,587	49,395
Available for sale, OTTI recognized in AOCI	(42)	(8)
Held to maturity, Amortized Cost	8,430	7,331
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain	190	266
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss	(68)	(8)
Held to maturity, Fair Value	8,552	7,589
Held to maturity, OTTI recognized in AOCI		0
U.S. Treasury and agency
Investment [Line Items]
Available for sale, Amortized Cost	2,481	2,741
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	52	87
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(5)	(8)
Available for sale, Fair Value	2,528	2,820
Available for sale, OTTI recognized in AOCI	0	0
Held to maturity, Amortized Cost	733	832
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain	13	20
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss	(1)	(2)
Held to maturity, Fair Value	745	850
Held to maturity, OTTI recognized in AOCI	0	0
Foreign
Investment [Line Items]
Available for sale, Amortized Cost	13,190	14,703
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	468	629
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(213)	(90)
Available for sale, Fair Value	13,445	15,242
Available for sale, OTTI recognized in AOCI	(13)	0
Held to maturity, Amortized Cost	763	916
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain	30	47
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss	(8)	0
Held to maturity, Fair Value	785	963
Held to maturity, OTTI recognized in AOCI	0	0
Corporate securities
Investment [Line Items]
Available for sale, Amortized Cost	15,028	16,897
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	355	704
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(454)	(170)
Available for sale, Fair Value	14,929	17,431
Available for sale, OTTI recognized in AOCI	(28)	(7)
Held to maturity, Amortized Cost	3,054	2,323
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain	57	102
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss	(55)	(2)
Held to maturity, Fair Value	3,056	2,423
Held to maturity, OTTI recognized in AOCI	0	0
Mortgage backed-securities
Investment [Line Items]
Available for sale, Amortized Cost	9,827	10,011
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	183	304
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(52)	(29)
Available for sale, Fair Value	9,958	10,286
Available for sale, OTTI recognized in AOCI	(1)	(1)
Held to maturity, Amortized Cost	1,707	1,983
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain	38	57
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss	(2)	(1)
Held to maturity, Fair Value	1,743	2,039
Held to maturity, OTTI recognized in AOCI	0	0
States, municipalities, and political subdivisions
Investment [Line Items]
Available for sale, Amortized Cost	2,623	3,474
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	110	147
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(6)	(5)
Available for sale, Fair Value	2,727	3,616
Available for sale, OTTI recognized in AOCI	0	0
Held to maturity, Amortized Cost	2,173	1,277
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain	52	40
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss	(2)	(3)
Held to maturity, Fair Value	2,223	1,314
Held to maturity, OTTI recognized in AOCI	$ 0	$ 0

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Investments (Schedule Of Fixed Maturities By Contractual Maturity) (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Available for sale, Due in 1 year or less, Amortized Cost	$ 1,856	$ 2,187
Available for sale, Due after 1 year through 5 years, Amortized Cost	14,936	15,444
Available for sale, Due after 5 years though 10 years, Amortized Cost	12,258	15,663
Available for sale, Due after 10 years, Amortized Cost	4,272	4,521
Available for sale, Subtotal, Amortized Cost	33,322	37,815
Available for sale, Mortgage-backed securities, Amortized Cost	9,827	10,011
Available for sale, Amortized Cost	43,149	47,826
Available for sale, Due in 1 year or less, Fair Value	1,865	2,206
Available for sale, Due after 1 year through 5 years, Fair Value	15,104	15,857
Available for sale, Due after 5 years through 10 years, Fair Value	12,173	16,089
Available for sale, Due after 10 years, Fair Value	4,487	4,957
Available for sale, Subtotal, Fair Value	33,629	39,109
Available for sale, Mortgage backed securities, Fair Value	9,958	10,286
Available for sale, Fair Value	43,587	49,395
Held to maturity, Due in 1 year or less, Amortized Cost	492	353
Held to maturity, Due after 1 year through 5 years, Amortized Cost	2,443	2,603
Held to maturity, Due after 5 years through 10 years, Amortized Cost	2,292	1,439
Held to maturity, Due after 10 years, Amortized Cost	1,496	953
Held to maturity, Subtotal, Amortized Cost	6,723	5,348
Held to maturity, Mortgage backed securities, Amortized Cost	1,707	1,983
Held to maturity, Amortized Cost	8,430	7,331
Held to maturity, Due in 1 year or less, Fair Value	495	355
Held to maturity, Due after 1 year through 5, Fair Value	2,517	2,693
Held to maturity, Due after 5 years through 10 years, Fair Value	2,313	1,489
Held to maturity, Due after 10 years, Fair Value	1,484	1,013
Held to maturity, Subtotal, Fair Value	6,809	5,550
Held to maturity, Mortgage backed securities, Fair Value	1,743	2,039
Held to maturity, Fair Value	$ 8,552	$ 7,589

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Investments (Schedule Of Cost And Fair Value Of Equity Securities) (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Cost	$ 441	$ 440
Gross unrealized appreciation	74	83
Gross unrealized depreciation	(18)	(13)
Equity securities	$ 497	$ 510

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Investments (Schedule Of Default Assumptions By Moody's Rating Categories) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Percentage of mortgage-backed securities represented by investments in US government agency bonds	81.00%	83.00%
Investment Grade | Aaa - Bbb | Minimum
Financing Receivable, Recorded Investment [Line Items]
1-in-100 Year Default Rate	0.00%
Historical Mean Default Rate	0.00%
Investment Grade | Aaa - Bbb | Maximum
Financing Receivable, Recorded Investment [Line Items]
1-in-100 Year Default Rate	1.30%
Historical Mean Default Rate	0.30%
Below Investment Grade | Ba
Financing Receivable, Recorded Investment [Line Items]
1-in-100 Year Default Rate	4.90%
Historical Mean Default Rate	1.10%
Below Investment Grade | B
Financing Receivable, Recorded Investment [Line Items]
1-in-100 Year Default Rate	12.70%
Historical Mean Default Rate	3.40%
Below Investment Grade | Caa - C
Financing Receivable, Recorded Investment [Line Items]
1-in-100 Year Default Rate	50.20%
Historical Mean Default Rate	13.10%

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Investments (Net Realized Gains (Losses) And Losses Included In Net Realized Gains (Losses) And Other Comprehensive Income) (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract]
OTTI on fixed maturities, gross									$ (142)	$ (64)	$ (18)
OTTI on fixed maturities recognized in OCI (pre-tax)									39	7	0
OTTI on fixed maturities, net									(103)	(57)	(18)
Fixed maturities, Gross realized gains excluding OTTI									158	213	237
Fixed maturities, Gross realized losses excluding OTTI									(235)	(133)	(129)
Total fixed maturities									(180)	23	90
OTTI on equity securities									(7)	(8)	(2)
Equity securities, Gross realized gains excluding OTTI									47	22	21
Equity securities, Gross realized losses excluding OTTI									(11)	(61)	(4)
Total equity securities									29	(47)	15
OTTI on other investments									(2)	(3)	(2)
Foreign exchange losses									(80)	(40)	29
Investment and embedded derivative instruments									32	(107)	78
Fair value adjustments on insurance derivative									(203)	(217)	878
S&P put options and futures									(10)	(168)	(579)
Other derivative instruments									(12)	50	(2)
Other									6	2	(3)
Total net realized gains (losses)	$ (60)	$ (397)	$ 126	$ (89)	$ (210)	$ (120)	$ (73)	$ (104)	(420)	(507)	504
Change in net unrealized appreciation (depreciation) on investments, Fixed maturities available for sale									(1,119)	734	(1,798)
Change in net unrealized appreciation (depreciation) on investments, Fixed maturities held to maturity									43	(2)	(82)
Change in net unrealized appreciation (depreciation) on investments, Equity securities									(17)	77	(41)
Change in net unrealized appreciation (depreciation) on investments, Other									(36)	35	54
Change in net unrealized appreciation (depreciation) on investments, Income tax expense									152	(167)	408
Change in net unrealized appreciation on investments,									(977)	677	(1,459)
Total net realized gains (losses) and change in net unrealized appreciation (depreciation) on investments									$ (1,397)	$ 170	$ (955)

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Investments (Roll-Forward Of Pre-Tax Credit Losses Related To Fixed Maturities For Which Portion Of Other-Than-Temporary Impairment Was Recognized In Other Comprehensive Income) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Roll-Forward Of Pre-Tax Credit Losses Related To Fixed Maturities For Which Portion Of OTTI Was Recognized In OCI
Balance of credit losses related to securities still held-beginning of period	$ 28	$ 37	$ 43
Additions where no OTTI was previously recorded	41	22	9
Additions where an OTTI was previously recorded	9	5	3
Reductions for securities sold during the period	(25)	(36)	(18)
Balance of credit losses related to securities still held-end of period	$ 53	$ 28	$ 37

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Investments (Schedule Of Other Investments) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Schedule of Cost-method Investments [Line Items]
Other investments - Total at Fair Value	$ 3,291	$ 3,346
Other investments - Total at Cost	2,993	2,999
Fair Value
Schedule of Cost-method Investments [Line Items]
Investment funds	269	378
Limited partnerships	709	691
Partially owned investment companies	1,498	1,492
Life insurance policies	222	205
Policy loans	184	187
Trading securities	284	290
Other	125	103
Other investments - Total at Fair Value	3,291	3,346
Cost
Schedule of Cost-method Investments [Line Items]
Investment funds	138	228
Limited partnerships	542	497
Partially owned investment companies	1,498	1,492
Life insurance policies	222	205
Policy loans	184	187
Trading securities	284	287
Other	125	103
Other investments - Total at Cost	$ 2,993	$ 2,999

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Investments (Schedule Of Investments In Partially-Owned Insurance Companies) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Apr. 14, 2015	Mar. 27, 2015	Dec. 31, 2014
Investment [Line Items]
Carrying Value	$ 653			$ 504
Issued Share Capital	1,888			1,112
Freisenbruch-Meyer | Bermuda
Investment [Line Items]
Carrying Value	9			9
Issued Share Capital	$ 5			$ 5
Ownership Percentage	40.00%			40.00%
ACE Cooperative Ins. Co. - Saudi Arabia | Saudi Arabia
Investment [Line Items]
Carrying Value	$ 11			$ 10
Issued Share Capital	$ 27			$ 27
Ownership Percentage	30.00%			30.00%
Huatai Group | China
Investment [Line Items]
Carrying Value	$ 430			$ 397
Issued Share Capital	$ 624			$ 638
Ownership Percentage	20.00%			20.00%
Huatai Life Insurance Company | China
Investment [Line Items]
Carrying Value	$ 107			$ 86
Issued Share Capital	$ 428			$ 438
Ownership Percentage	20.00%			20.00%
Russian Reinsurance Company | Russia
Investment [Line Items]
Carrying Value	$ 2			$ 2
Issued Share Capital	$ 4			$ 4
Ownership Percentage	23.30%			23.30%
ABR Reinsurance Capital Holdings Ltd. [Member]
Investment [Line Items]
Carrying Value	$ 94		$ 90	$ 0
Issued Share Capital	$ 800			$ 0
Ownership Percentage	11.30%	11.30%
ABR Reinsurance Capital Holdings Ltd. [Member] | Bermuda
Investment [Line Items]
Ownership Percentage				0.00%

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Investments (Aggregate Fair Value And Gross Unrealized Loss By Length Of Time Security Has Continuously Been In Unrealized Loss Position) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Investment [Line Items]
Document Period End Date	Dec. 31, 2015
Investment securities, Unrealized loss position, 0-12 Months, Fair Value	$ 16,763	$ 8,559
Investment securities, Unrealized loss position, 0-12 Months, Gross Unrealized Loss	(601)	(244)
Investment securities, Unrealized loss position, Over 12 Months, Fair Value	1,885	3,932
Investment securities, Unrealized loss position, Over 12 Months, Gross Unrealized Loss	(226)	(79)
Investment securities, Unrealized loss position, Total Fair Value	18,648	12,491
Investment securities, Unrealized loss position, Total Gross Unrealized Loss	(827)	(323)
U.S. Treasury and agency
Investment [Line Items]
Investment securities, Unrealized loss position, 0-12 Months, Fair Value	996	350
Investment securities, Unrealized loss position, 0-12 Months, Gross Unrealized Loss	(5)	(1)
Investment securities, Unrealized loss position, Over 12 Months, Fair Value	153	666
Investment securities, Unrealized loss position, Over 12 Months, Gross Unrealized Loss	(1)	(9)
Investment securities, Unrealized loss position, Total Fair Value	1,149	1,016
Investment securities, Unrealized loss position, Total Gross Unrealized Loss	(6)	(10)
Foreign
Investment [Line Items]
Investment securities, Unrealized loss position, 0-12 Months, Fair Value	3,953	2,262
Investment securities, Unrealized loss position, 0-12 Months, Gross Unrealized Loss	(148)	(75)
Investment securities, Unrealized loss position, Over 12 Months, Fair Value	436	375
Investment securities, Unrealized loss position, Over 12 Months, Gross Unrealized Loss	(73)	(15)
Investment securities, Unrealized loss position, Total Fair Value	4,389	2,637
Investment securities, Unrealized loss position, Total Gross Unrealized Loss	(221)	(90)
Corporate securities
Investment [Line Items]
Investment securities, Unrealized loss position, 0-12 Months, Fair Value	7,518	4,684
Investment securities, Unrealized loss position, 0-12 Months, Gross Unrealized Loss	(371)	(150)
Investment securities, Unrealized loss position, Over 12 Months, Fair Value	738	738
Investment securities, Unrealized loss position, Over 12 Months, Gross Unrealized Loss	(138)	(22)
Investment securities, Unrealized loss position, Total Fair Value	8,256	5,422
Investment securities, Unrealized loss position, Total Gross Unrealized Loss	(509)	(172)
Mortgage backed-securities
Investment [Line Items]
Investment securities, Unrealized loss position, 0-12 Months, Fair Value	3,399	704
Investment securities, Unrealized loss position, 0-12 Months, Gross Unrealized Loss	(42)	(2)
Investment securities, Unrealized loss position, Over 12 Months, Fair Value	516	1,663
Investment securities, Unrealized loss position, Over 12 Months, Gross Unrealized Loss	(12)	(28)
Investment securities, Unrealized loss position, Total Fair Value	3,915	2,367
Investment securities, Unrealized loss position, Total Gross Unrealized Loss	(54)	(30)
States, municipalities, and political subdivisions
Investment [Line Items]
Investment securities, Unrealized loss position, 0-12 Months, Fair Value	556	458
Investment securities, Unrealized loss position, 0-12 Months, Gross Unrealized Loss	(6)	(3)
Investment securities, Unrealized loss position, Over 12 Months, Fair Value	42	490
Investment securities, Unrealized loss position, Over 12 Months, Gross Unrealized Loss	(2)	(5)
Investment securities, Unrealized loss position, Total Fair Value	598	948
Investment securities, Unrealized loss position, Total Gross Unrealized Loss	(8)	(8)
Total fixed maturities
Investment [Line Items]
Investment securities, Unrealized loss position, 0-12 Months, Fair Value	16,422	8,458
Investment securities, Unrealized loss position, 0-12 Months, Gross Unrealized Loss	(572)	(231)
Investment securities, Unrealized loss position, Over 12 Months, Fair Value	1,885	3,932
Investment securities, Unrealized loss position, Over 12 Months, Gross Unrealized Loss	(226)	(79)
Investment securities, Unrealized loss position, Total Fair Value	18,307	12,390
Investment securities, Unrealized loss position, Total Gross Unrealized Loss	(798)	(310)
Equity securities
Investment [Line Items]
Investment securities, Unrealized loss position, 0-12 Months, Fair Value	131	101
Investment securities, Unrealized loss position, 0-12 Months, Gross Unrealized Loss	(18)	(13)
Investment securities, Unrealized loss position, Over 12 Months, Fair Value	0
Investment securities, Unrealized loss position, Over 12 Months, Gross Unrealized Loss	0	0
Investment securities, Unrealized loss position, Total Fair Value	131	101
Investment securities, Unrealized loss position, Total Gross Unrealized Loss	(18)	$ (13)
Other investments
Investment [Line Items]
Investment securities, Unrealized loss position, 0-12 Months, Fair Value	210
Investment securities, Unrealized loss position, 0-12 Months, Gross Unrealized Loss	(11)
Investment securities, Unrealized loss position, Over 12 Months, Fair Value	0
Investment securities, Unrealized loss position, Over 12 Months, Gross Unrealized Loss	0
Investment securities, Unrealized loss position, Total Fair Value	210
Investment securities, Unrealized loss position, Total Gross Unrealized Loss	$ (11)

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Investments (Schedule Of Sources Of Net Investment Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net Investment Income [Line Items]
Gross investment income	$ 2,308	$ 2,371	$ 2,264
Investment expenses	(114)	(119)	(120)
Net investment income	2,194	2,252	2,144
Fixed Maturities [Member]
Net Investment Income [Line Items]
Gross investment income	2,157	2,199	2,093
Short-term investments
Net Investment Income [Line Items]
Gross investment income	49	45	29
Equity securities
Net Investment Income [Line Items]
Gross investment income	16	33	37
Other Investments [Member]
Net Investment Income [Line Items]
Gross investment income	$ 86	$ 94	$ 105

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Investments (Schedule Of Components Of Restricted Assets) (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Trust funds	$ 11,862	$ 10,838
Deposits with non-U.S. regulatory authorities	2,075	2,305
Assets pledged under reverse repurchase agreements	1,459	1,431
Deposits with U.S. regulatory authorities	1,242	1,345
Other pledged assets	392	457
Total restricted assets	$ 17,030	$ 16,376

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Fair Value Measurements (Narrative) (Detail)	12 Months Ended
	Dec. 31, 2015 USD ($) Year	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Fair Value Measurements Of Financial Instruments [Line Items]
GLB - Lapse rate - lower range	1.00%
GLB - Lapse rate - upper range	6.00%
GLB - Spike lapse rate - lower range	10.00%
GLB - Spike lapse rate - upper range	30.00%
GLB - Ultimate lapse rate	10.00%
GLB - Length of ultimate lapse rate period, years | Year	2
GLB - Adjustment factor for valuable guarantees - lower	10.00%
GLB - Adjustment factor for valuable guarantees - upper	75.00%
Level 1 To Level 2 Transfers	$ 0	$ 189,000,000	$ 19,000,000
Level 2 To Level 1 Transfers	0	0	$ 0
Realized Gain Losses As A Result of Annuitization Changes (GLB)	80,000,000
Realized Gain Losses As A Result of Change in Lapse Assumption (GLB)	(10,000,000)
Realized Gain Losses As A Result of Change in Partial Withdrawal Assumption	110,000,000
Realized Gain Losses As A Result of Valuation Model Refinement (GLB)	$ (45,000,000)
Document Period End Date	Dec. 31, 2015
Assets measured using NAV	$ 2,477,000,000	2,561,000,000
Other Investments [Member]
Fair Value Measurements Of Financial Instruments [Line Items]
Assets measured using NAV	25,000,000
Investment Funds Limited Partnerships Partially Owned Investment Companies Fair Value [Member]
Fair Value Measurements Of Financial Instruments [Line Items]
Assets measured using NAV	$ 2,477,000,000	$ 2,561,000,000
Redemption Notice Periods Lower Range [Member]
Fair Value Measurements Of Financial Instruments [Line Items]
Notice period for redemption for alternative investments investment funds, days	5 days
Redemption Notice Periods Upper Range [Member]
Fair Value Measurements Of Financial Instruments [Line Items]
Notice period for redemption for alternative investments investment funds, days	120 days

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Fair value measurements Fair Value Measurements (Annuitization Experience for GMIB Policies) (Details)	12 Months Ended
	Dec. 31, 2015
One Year Of Credible Experience [Member]
Annuitization Experience For GMIB Policies [Line Items]
Percent of GMIB guaranteed value that are represented by clients with several years of annuitization experience	68.00%
Several Years Of Credible Experience [Member]
Annuitization Experience For GMIB Policies [Line Items]
Percent of GMIB guaranteed value that are represented by clients with several years of annuitization experience	4.00%
No Credible Experience [Member]
Annuitization Experience For GMIB Policies [Line Items]
Percent of GMIB guaranteed value that are represented by clients with several years of annuitization experience	28.00%
First Year [Member] | No Credible Experience [Member]
Annuitization Experience For GMIB Policies [Line Items]
Annuitization rate	15.00%
Subsequent years [Member] | Several Years Of Credible Experience [Member]
Annuitization Experience For GMIB Policies [Line Items]
Annuitization rate	10.00%
Subsequent years [Member] | No Credible Experience [Member]
Annuitization Experience For GMIB Policies [Line Items]
Annuitization rate	10.00%
Maximum
Annuitization Experience For GMIB Policies [Line Items]
Annuitization rate	55.00%	[1]
Maximum | First Year [Member] | One Year Of Credible Experience [Member]
Annuitization Experience For GMIB Policies [Line Items]
Annuitization rate	55.00%
Maximum | First Year [Member] | Several Years Of Credible Experience [Member]
Annuitization Experience For GMIB Policies [Line Items]
Annuitization rate	18.00%
Maximum | First Year [Member] | No Credible Experience [Member]
Annuitization Experience For GMIB Policies [Line Items]
Annuitization rate	55.00%
Maximum | Subsequent years [Member] | One Year Of Credible Experience [Member]
Annuitization Experience For GMIB Policies [Line Items]
Annuitization rate	27.00%
Maximum | Subsequent years [Member] | Several Years Of Credible Experience [Member]
Annuitization Experience For GMIB Policies [Line Items]
Annuitization rate	27.00%
Maximum | Subsequent years [Member] | No Credible Experience [Member]
Annuitization Experience For GMIB Policies [Line Items]
Annuitization rate	27.00%
Minimum
Annuitization Experience For GMIB Policies [Line Items]
Annuitization rate	0.00%	[1]
Minimum | First Year [Member] | One Year Of Credible Experience [Member]
Annuitization Experience For GMIB Policies [Line Items]
Annuitization rate	7.00%
Minimum | First Year [Member] | Several Years Of Credible Experience [Member]
Annuitization Experience For GMIB Policies [Line Items]
Annuitization rate	18.00%
Minimum | First Year [Member] | No Credible Experience [Member]
Annuitization Experience For GMIB Policies [Line Items]
Annuitization rate	7.00%
Minimum | Subsequent years [Member] | One Year Of Credible Experience [Member]
Annuitization Experience For GMIB Policies [Line Items]
Annuitization rate	5.00%
Minimum | Subsequent years [Member] | Several Years Of Credible Experience [Member]
Annuitization Experience For GMIB Policies [Line Items]
Annuitization rate	5.00%
Minimum | Subsequent years [Member] | No Credible Experience [Member]
Annuitization Experience For GMIB Policies [Line Items]
Annuitization rate	5.00%

[1] Discussion of the most significant inputs used in the fair value measurement of GLB and the sensitivity of those assumptions is included within Note 4 a) Guaranteed living benefits.

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Fair Value Measurements (Financial Instruments Measured At Fair Value On Recurring Basis) (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Document Period End Date		Dec. 31, 2015
Available for sale, Fair Value		$ 43,587	$ 49,395
Equity securities		497	510
Short-term investments		10,446	2,322
Other investments		3,291	3,346
Securities lending collateral		1,046	1,330
Level 1
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		1,712	1,680
Equity securities		481	492
Short-term investments		7,171	1,183
Other investments		347	370
Investment derivative instruments, assets		12	18
Separate account assets		1,464	1,400
Total assets measured at fair value		11,187	5,143
Investment derivative instruments, liability		13	36
Other derivative instruments, liability		4	21
GLB	[1]		0
Total liabilities measured at fair value		17	57
Level 1 | U.S. Treasury and agency
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		1,712	1,680
Level 2
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		41,591	47,491
Equity securities			16
Short-term investments		3,275	1,139
Other investments		230	211
Securities lending collateral		1,046	1,330
Other derivative instruments, assets			2
Separate account assets		88	90
Total assets measured at fair value		46,230	50,279
GLB	[1]		0
Level 2 | U.S. Treasury and agency
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		816	1,140
Level 2 | Foreign
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		13,388	15,220
Level 2 | Corporate securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		14,755	17,244
Level 2 | Mortgage backed-securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		9,905	10,271
Level 2 | States, municipalities, and political subdivisions
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		2,727	3,616
Level 3
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		284	224
Equity securities		16	2
Other investments		212	204
Total assets measured at fair value		512	430
Other derivative instruments, liability		6	4
GLB		609	406	[1]
Total liabilities measured at fair value		615	410
Level 3 | Foreign
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		57	22
Level 3 | Corporate securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		174	187
Level 3 | Mortgage backed-securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		53	15
Total
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		43,587	49,395
Equity securities		497	510
Short-term investments		10,446	2,322
Other investments		789	785
Securities lending collateral		1,046	1,330
Investment derivative instruments, assets		12	18
Other derivative instruments, assets			2
Separate account assets		1,552	1,490
Total assets measured at fair value		57,929	55,852
Investment derivative instruments, liability		13	36
Other derivative instruments, liability		10	25
GLB		609	406	[1]
Total liabilities measured at fair value		632	467
Total | U.S. Treasury and agency
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		2,528	2,820
Total | Foreign
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		13,445	15,242
Total | Corporate securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		14,929	17,431
Total | Mortgage backed-securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		9,958	10,286
Total | States, municipalities, and political subdivisions
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		$ 2,727	$ 3,616

[1] {F|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOjExMWJkOTUzNTQ4MTQ4NDhiZTFlZGE4MWZiODBmYzAyfFRleHRTZWxlY3Rpb246Q0UwMUQyNjUyOUVDNjMyRURBRjNGQjZBQjkxMzUyN0QM}

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Fair Value Measurements (Fair Value And Maximum Future Funding Commitments Related To Investments) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Fair Value And Maximum Future Funding Commitments Related To Investments [Line Items]
Maximum future funding commitment	$ 824	$ 1,010
Fair Value	2,477	2,561
Financial
Fair Value And Maximum Future Funding Commitments Related To Investments [Line Items]
Maximum future funding commitment	105	145
Fair Value	300	282
Real Assets
Fair Value And Maximum Future Funding Commitments Related To Investments [Line Items]
Maximum future funding commitment	140	210
Fair Value	474	451
Distressed
Fair Value And Maximum Future Funding Commitments Related To Investments [Line Items]
Maximum future funding commitment	218	175
Fair Value	261	232
Private Credit
Fair Value And Maximum Future Funding Commitments Related To Investments [Line Items]
Maximum future funding commitment	209	190
Fair Value	265	299
Traditional
Fair Value And Maximum Future Funding Commitments Related To Investments [Line Items]
Maximum future funding commitment	152	285
Fair Value	895	895
Vintage
Fair Value And Maximum Future Funding Commitments Related To Investments [Line Items]
Maximum future funding commitment		5
Fair Value	13	24
Investment Funds
Fair Value And Maximum Future Funding Commitments Related To Investments [Line Items]
Fair Value	$ 269	$ 378
Minimum | Financial
Fair Value And Maximum Future Funding Commitments Related To Investments [Line Items]
Expected liquidation period	5 years	5 years
Minimum | Real Assets
Fair Value And Maximum Future Funding Commitments Related To Investments [Line Items]
Expected liquidation period	3 years	3 years
Minimum | Distressed
Fair Value And Maximum Future Funding Commitments Related To Investments [Line Items]
Expected liquidation period	5 years	5 years
Minimum | Private Credit
Fair Value And Maximum Future Funding Commitments Related To Investments [Line Items]
Expected liquidation period	3 years	3 years
Minimum | Traditional
Fair Value And Maximum Future Funding Commitments Related To Investments [Line Items]
Expected liquidation period	3 years	3 years
Minimum | Vintage
Fair Value And Maximum Future Funding Commitments Related To Investments [Line Items]
Expected liquidation period	1 year	1 year
Maximum | Financial
Fair Value And Maximum Future Funding Commitments Related To Investments [Line Items]
Expected liquidation period	9 years	9 years
Maximum | Real Assets
Fair Value And Maximum Future Funding Commitments Related To Investments [Line Items]
Expected liquidation period	7 years	7 years
Maximum | Distressed
Fair Value And Maximum Future Funding Commitments Related To Investments [Line Items]
Expected liquidation period	9 years	9 years
Maximum | Private Credit
Fair Value And Maximum Future Funding Commitments Related To Investments [Line Items]
Expected liquidation period	7 years	7 years
Maximum | Traditional
Fair Value And Maximum Future Funding Commitments Related To Investments [Line Items]
Expected liquidation period	9 years	9 years
Maximum | Vintage
Fair Value And Maximum Future Funding Commitments Related To Investments [Line Items]
Expected liquidation period	2 years	2 years

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Fair Value Measurements (Schedule Of Significant Unobservable Inputs Used In Level 3 Liability Valuations) (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Valuation Technique	[1]	Actuarial model
Minimum
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Inputs Lapse rate	[1]	1.00%
Annuitization rate	[1]	0.00%
Maximum
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Inputs Lapse rate	[1]	30.00%
Annuitization rate	[1]	55.00%
Guaranteed Living Benefits [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
GLB liability		$ 888		$ 663		$ 427		$ 1,400
Guaranteed Minimum Death Benefit
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
GLB liability		117		111
Guaranteed Minimum Income Benefit
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value	[1]	609
Balance - beginning of year, liabilities		406	[2],[3]	193	[3],[4]	1,119	[4]
Transfers Into Level 3, liabilities				0	[3]	0	[4]
Transfers out of Level 3, liabilities				0	[3]	0	[4]
Change in Net Unrealized Gains (Losses) included in OCI, Liabilities	[3]			0
Net Realized Gains/Losses, Liabilities		203	[2]	213	[3]	(926)	[4]
Purchased, liabilities				0	[3]	0	[4]
Sales, liabilities				0	[3]	0	[4]
Settlements, liabilities				0	[3]	0	[4]
Balance - end of year, liabilities		609	[2]	406	[2],[3]	193	[3],[4]
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date, Liabilities		203	[2]	213	[3]	(926)	[4]
Equity securities
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance, beginning of year, assets		2		4		3
Transfers into Level 3, assets						8
Transfers out of Level 3, assets				(2)		(1)
Change in Net Unrealized Gains (Losses) included in OCI, Assets		3				6
Net Realized Gains/Losses, Assets		(2)				4
Purchased, assets		13		2		2
Sales, assets				(2)		(6)
Balance, end of year, assets		16		2		4
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date, Assets		(2)
Short-term investments
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance, beginning of year, assets				7
Transfers into Level 3, assets						8
Transfers out of Level 3, assets				(7)		(2)
Purchased, assets						3
Sales, assets						(1)
Settlements, assets						(1)
Balance, end of year, assets						7
Other Long-term Investments [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance, beginning of year, assets		204		196		180
Change in Net Unrealized Gains (Losses) included in OCI, Assets		(6)		1		(2)
Purchased, assets		33		20		29
Settlements, assets		(19)		(11)		(11)
Balance, end of year, assets		212		204		196
Other Derivative Instruments
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance - beginning of year, liabilities		4
Transfers Into Level 3, liabilities				2
Net Realized Gains/Losses, Liabilities		2		2
Balance - end of year, liabilities		6		4
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date, Liabilities		2		2
Fixed maturities available for sale | Foreign Government Debt Securities [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance, beginning of year, assets		22		44		60
Transfers into Level 3, assets		34		10		36
Transfers out of Level 3, assets				(34)		(54)
Change in Net Unrealized Gains (Losses) included in OCI, Assets		(2)		1		0
Net Realized Gains/Losses, Assets		1		3		(1)
Purchased, assets		15		15		24
Sales, assets		(3)		(4)		(21)
Settlements, assets		(8)		(5)		(2)
Balance, end of year, assets		57		22		44
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date, Assets		(1)		(4)		0
Fixed maturities available for sale | Corporate securities
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance, beginning of year, assets		187		166		102
Transfers into Level 3, assets		16		37		47
Transfers out of Level 3, assets				(23)		(31)
Change in Net Unrealized Gains (Losses) included in OCI, Assets		(1)		1		0
Net Realized Gains/Losses, Assets		4		5		2
Purchased, assets		52		73		75
Sales, assets		(28)		(38)		(7)
Settlements, assets		(48)		(22)		(18)
Balance, end of year, assets		174		187		166
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date, Assets		(2)		(5)		(2)
Fixed maturities available for sale | Mortgage backed-securities
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance, beginning of year, assets		15		8		13
Purchased, assets		41		8		0
Sales, assets		(2)				(3)
Settlements, assets		(1)		(1)		(2)
Balance, end of year, assets		$ 53		$ 15		$ 8

[1] Discussion of the most significant inputs used in the fair value measurement of GLB and the sensitivity of those assumptions is included within Note 4 a) Guaranteed living benefits.

[2] Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the consolidated balance sheets. Refer to Note 5 c) for additional information.

[3] Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the consolidated balance sheets. The liability for GLB reinsurance was $663 million at December 31, 2014 and $427 million at December 31, 2013, which includes a fair value derivative adjustment of $406 million and $193 million, respectively.

[4] Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the consolidated balance sheets. The liability for GLB reinsurance was $427 million at December 31, 2013 and $1.4 billion at December 31, 2012, which includes a fair value derivative adjustment of $193 million and $1.1 billion, respectively.

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Fair Value Measurements (Carrying Values And Fair Values Of Financial Instruments Not Measured At Fair Value) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Document Period End Date	Dec. 31, 2015
Held-to-maturity Securities, Fair Value	$ 8,552	$ 7,589
Repurchase agreements	1,404	1,402
Financial Instruments Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value	8,552	7,589
Repurchase agreements	1,404	1,402
Short-term debt		1,169
Long-term debt	9,678	3,690
Trust preferred securities	446	462
Total liabilities	11,528	6,723
Financial Instruments Fair Value [Member] | U.S. Treasury and agency
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value	745	850
Financial Instruments Fair Value [Member] | Foreign
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value	785	963
Financial Instruments Fair Value [Member] | Corporate Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value	3,056	2,423
Financial Instruments Fair Value [Member] | Mortgage backed-securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value	1,743	2,039
Financial Instruments Fair Value [Member] | US States and Political Subdivisions Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value	2,223	1,314
Level 2 | Financial Instruments Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value	7,955	6,915
Repurchase agreements	1,404	1,402
Short-term debt		1,169
Long-term debt	9,678	3,690
Trust preferred securities	446	462
Total liabilities	11,528	6,723
Level 2 | Financial Instruments Fair Value [Member] | U.S. Treasury and agency
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value	162	191
Level 2 | Financial Instruments Fair Value [Member] | Foreign
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value	785	963
Level 2 | Financial Instruments Fair Value [Member] | Corporate Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value	3,042	2,408
Level 2 | Financial Instruments Fair Value [Member] | Mortgage backed-securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value	1,743	2,039
Level 2 | Financial Instruments Fair Value [Member] | US States and Political Subdivisions Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value	2,223	1,314
Level 3 | Securities Loaned or Sold under Agreements to Repurchase [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Repurchase agreements		0
Level 3 | Financial Instruments Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value	14	15
Short-term debt		0
Long-term debt		0
Trust preferred securities		0
Total liabilities		0
Level 3 | Financial Instruments Fair Value [Member] | U.S. Treasury and agency
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value	0	0
Level 3 | Financial Instruments Fair Value [Member] | Foreign
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value		0
Level 3 | Financial Instruments Fair Value [Member] | Corporate Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value	14	15
Level 3 | Financial Instruments Fair Value [Member] | Mortgage backed-securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value		0
Level 3 | Financial Instruments Fair Value [Member] | US States and Political Subdivisions Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value		0
Cost | Financial Instruments Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value	8,430	7,331
Repurchase agreements	1,404	1,402
Short-term debt		1,150
Long-term debt	9,447	3,357
Trust preferred securities	309	309
Total liabilities	11,160	6,218
Cost | Financial Instruments Carrying Value [Member] | U.S. Treasury and agency
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value	733	832
Cost | Financial Instruments Carrying Value [Member] | Foreign
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value	763	916
Cost | Financial Instruments Carrying Value [Member] | Corporate Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value	3,054	2,323
Cost | Financial Instruments Carrying Value [Member] | Mortgage backed-securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value	1,707	1,983
Cost | Financial Instruments Carrying Value [Member] | US States and Political Subdivisions Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value	2,173	1,277
Level 1 | Financial Instruments Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value	583	659
Short-term debt		0
Long-term debt		0
Trust preferred securities		0
Total liabilities		0
Level 1 | Financial Instruments Fair Value [Member] | U.S. Treasury and agency
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value	$ 583	659
Level 1 | Financial Instruments Fair Value [Member] | Foreign
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value		0
Level 1 | Financial Instruments Fair Value [Member] | Corporate Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value		0
Level 1 | Financial Instruments Fair Value [Member] | Mortgage backed-securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value		0
Level 1 | Financial Instruments Fair Value [Member] | US States and Political Subdivisions Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value		$ 0

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Reinsurance (Consolidated Reinsurance) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Premiums written [Abstract]
Direct									$ 19,879	$ 20,069	$ 19,212
Assumed									3,932	3,321	3,616
Ceded									(6,098)	(5,591)	(5,803)
Net									17,713	17,799	17,025
Premiums earned [Abstract]
Direct									19,355	19,555	18,856
Assumed									3,676	3,336	3,479
Ceded									(5,818)	(5,465)	(5,722)
Net premiums earned	$ 4,207	$ 4,719	$ 4,360	$ 3,927	$ 4,370	$ 4,754	$ 4,332	$ 3,970	$ 17,213	$ 17,426	$ 16,613

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Reinsurance (Reinsurance Recoverable on Ceded Reinsurance) (Details) - USD ($) $ in Millions		Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012
Reinsurance Disclosures [Abstract]
Reinsurance recoverable on unpaid losses and loss expenses		$ 10,741	[1]	$ 11,307	[1]	$ 10,612	$ 11,399
Reinsurance recoverable on paid losses and loss expenses	[1]	645		685
Net reinsurance recoverable on losses and loss expenses		$ 11,386		$ 11,992

[1] (1) Net of a provision for uncollectible reinsurance.

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Reinsurance (Reinsurance Recoverable by Category and Listing of Largest Reinsurers) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Gross reinsurance recoverable	$ 11,714
Provision	$ 328	$ 357
% of Gross	2.80%
Largest reinsurers
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Gross reinsurance recoverable	$ 5,335
Provision	$ 69
% of Gross	1.30%
Other reinsurers balances rated A- or better
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Gross reinsurance recoverable	$ 3,078
Provision	$ 44
% of Gross	1.40%
Other reinsurers balances with ratings lower than A- or not rated
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Gross reinsurance recoverable	$ 378
Provision	$ 68
% of Gross	18.00%
Other pools and government agencies
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Gross reinsurance recoverable	$ 347
Provision	$ 14
% of Gross	4.00%
Structured settlements
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Gross reinsurance recoverable	$ 546
Provision	$ 10
% of Gross	1.80%
Other captives
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Gross reinsurance recoverable	$ 1,786
Provision	$ 23
% of Gross	1.30%
Other
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Gross reinsurance recoverable	$ 244
Provision	$ 100
% of Gross	41.00%

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Reinsurance Reinsurance (Assumed Life Reinsurance Programs Involving Minimum Benefit Guarantees Under Annuity Contracts - Schedule Of Guaranteed Minimum Benefits Income And Expense) (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Guaranteed Minimum Benefits [Line Items]
Net premiums earned	$ 4,207	$ 4,719	$ 4,360	$ 3,927	$ 4,370	$ 4,754	$ 4,332	$ 3,970	$ 17,213	$ 17,426	$ 16,613
Policy benefits and other reserve adjustments	159	89	153	142	134	125	144	114	543	517	515
Net realized gains (losses) including OTTI	$ (60)	$ (397)	$ 126	$ (89)	$ (210)	$ (120)	$ (73)	$ (104)	(420)	(507)	504
GMDB
Guaranteed Minimum Benefits [Line Items]
Net premiums earned									61	71	77
Policy benefits and other reserve adjustments									34	50	73
GLB
Guaranteed Minimum Benefits [Line Items]
Net premiums earned									121	138	149
Policy benefits and other reserve adjustments									45	36	27
Net realized gains (losses) including OTTI									(203)	(213)	929
Gain (loss) recognized in income									(127)	(111)	1,051
Net cash received									98	125	126
Net (increase) decrease in liability									$ (225)	$ (236)	$ 925

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Reinsurance (Assumed Life Reinsurance Programs Involving Minimum Benefit Guarantees Under Annuity Contracts - Narrative) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Guaranteed Minimum Benefits [Line Items]
Document Period End Date	Dec. 31, 2015
Reinsurance recoveries on losses and loss expenses incurred	$ 3,100	$ 3,100	$ 3,100
Provision for uncollectible reinsurance	$ 328	357
Average attained age of all policyholders under all benefits reinsured, years	69 years
Guaranteed Minimum Death Benefit
Guaranteed Minimum Benefits [Line Items]
Net Amount at Risk	$ 364	418
Reported liabilities	$ 117	111
Long-Duration Contracts, Assumptions by Product and Guarantee, Discount Rate	4.30%
GLB
Guaranteed Minimum Benefits [Line Items]
Net Amount at Risk	$ 733	440
Guaranteed Minimum Deaths Benefits And Guaranteed Living Benefits [Member]
Guaranteed Minimum Benefits [Line Items]
Mortality percentage according to Annuity 2000 mortality table	100.00%
Guaranteed Living Benefits [Member]
Guaranteed Minimum Benefits [Line Items]
Reported liabilities	$ 888	663	$ 427	$ 1,400
Fair value derivative adjustment in liability	$ 609	$ 406
Minimum | Guaranteed Minimum Death Benefit
Guaranteed Minimum Benefits [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Discount Rate	3.80%
Minimum | GLB
Guaranteed Minimum Benefits [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Discount Rate	4.50%
Minimum | Guaranteed Minimum Deaths Benefits And Guaranteed Living Benefits [Member]
Guaranteed Minimum Benefits [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Discount Rate	4.50%
Maximum | Guaranteed Minimum Death Benefit
Guaranteed Minimum Benefits [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Discount Rate	5.00%
Maximum | GLB
Guaranteed Minimum Benefits [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Discount Rate	5.00%

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Reinsurance Reinsurance (Net Amount at Risk and 100 Percent Mortality) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
GMDB
Guaranteed Minimum Benefits [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Discount Rate	4.30%
Net Amount at Risk	$ 364	$ 418
GLB
Guaranteed Minimum Benefits [Line Items]
Net Amount at Risk	733	440
GLB | GLB
Guaranteed Minimum Benefits [Line Items]
Net Amount at Risk	422	235
GLB | GMDB
Guaranteed Minimum Benefits [Line Items]
Net Amount at Risk	$ 89	$ 76
Minimum | GMDB
Guaranteed Minimum Benefits [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Discount Rate	3.80%
Minimum | GLB
Guaranteed Minimum Benefits [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Discount Rate	4.50%
Minimum | GMDB and GLB
Guaranteed Minimum Benefits [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Discount Rate	4.50%
Maximum | GMDB
Guaranteed Minimum Benefits [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Discount Rate	5.00%
Maximum | GLB
Guaranteed Minimum Benefits [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Discount Rate	5.00%

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intangible Assets (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 4,796	$ 4,904	$ 4,603
Other intangible assets	887	820
Intangible assets subject to amortization	789	717
Intangible assets not subject to amortization	98	103
Amortization of Intangible Assets	$ 171	$ 108	$ 95

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Intangible Assets (Roll-forward of Goodwill, by Business Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Roll Forward]
Balance at beginning of period	$ 4,904	$ 4,603
Purchase price allocation adjustment	(4)	4
Foreign exchange revaluation and other	(300)	(198)
Balance at end of period	4,796	4,904
Insurance - North American P&C
Goodwill [Roll Forward]
Balance at beginning of period	1,211	1,215
Purchase price allocation adjustment	0
Acquisition		0
Foreign exchange revaluation and other	(8)	(4)
Balance at end of period	1,399	1,211
Insurance - North American Agriculture
Goodwill [Roll Forward]
Balance at beginning of period	134	134
Purchase price allocation adjustment	0
Acquisition		0
Foreign exchange revaluation and other	0	0
Balance at end of period	134	134
Insurance - Overseas General
Goodwill [Roll Forward]
Balance at beginning of period	2,366	2,054
Purchase price allocation adjustment	(4)
Acquisition		449
Foreign exchange revaluation and other	(284)	(187)
Balance at end of period	2,078	2,366
Global Reinsurance
Goodwill [Roll Forward]
Balance at beginning of period	365	365
Purchase price allocation adjustment	0
Acquisition		0
Foreign exchange revaluation and other	0	0
Balance at end of period	365	365
Life
Goodwill [Roll Forward]
Balance at beginning of period	828	835
Purchase price allocation adjustment	0
Acquisition		0
Foreign exchange revaluation and other	(8)	(7)
Balance at end of period	820	828
Fianzas Monterrey
Goodwill [Roll Forward]
Acquisition		46
Fianzas Monterrey | Insurance - North American P&C
Goodwill [Roll Forward]
Acquisition		0
Fianzas Monterrey | Insurance - North American Agriculture
Goodwill [Roll Forward]
Acquisition		0
Fianzas Monterrey | Insurance - Overseas General
Goodwill [Roll Forward]
Acquisition		4
Fianzas Monterrey | Global Reinsurance
Goodwill [Roll Forward]
Acquisition		0
Fianzas Monterrey | Life
Goodwill [Roll Forward]
Acquisition		0
ABA Seguros
Goodwill [Roll Forward]
Acquisition		449
ABA Seguros | Insurance - North American P&C
Goodwill [Roll Forward]
Acquisition		0
ABA Seguros | Insurance - North American Agriculture
Goodwill [Roll Forward]
Acquisition		0
ABA Seguros | Insurance - Overseas General
Goodwill [Roll Forward]
Acquisition		46
ABA Seguros | Global Reinsurance
Goodwill [Roll Forward]
Acquisition		0
ABA Seguros | Life
Goodwill [Roll Forward]
Acquisition		$ 0
The Siam Commercial Samaggi Insurance PCL [Member]
Goodwill [Roll Forward]
Acquisition	196
The Siam Commercial Samaggi Insurance PCL [Member] | Insurance - North American P&C
Goodwill [Roll Forward]
Acquisition	196
The Siam Commercial Samaggi Insurance PCL [Member] | Insurance - North American Agriculture
Goodwill [Roll Forward]
Acquisition	0
The Siam Commercial Samaggi Insurance PCL [Member] | Insurance - Overseas General
Goodwill [Roll Forward]
Acquisition	0
Large Corporate Property And Casualty Business Of Itau Seguros [Member] | Global Reinsurance
Goodwill [Roll Forward]
Acquisition	0
Large Corporate Property And Casualty Business Of Itau Seguros [Member] | Life
Goodwill [Roll Forward]
Acquisition	$ 0

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Intangible Assets (Value Of Business Acquired (VOBA) Roll-forward) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Movement in Intangible Assets Arising from Insurance Contracts Acquired in Business Combination [Roll Forward]
Balance, beginning of year	$ 466	$ 536	$ 614
Amortization expense	(42)	(51)	(64)
Foreign exchange revaluation	(29)	(19)	(14)
Balance, end of year	$ 395	$ 466	$ 536

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Intangible Assets (Estimated Amortization Expense Over Next Five Years) (Details) $ in Millions	Dec. 31, 2015 USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2016, Other intangible assets	$ 88
2017, Other intangible assets	78
2018, Other intangible assets	70
2019, Other intangible assets	63
2020, Other intangible assets	58
Total, Other intangible assets	357
2017, VOBA	35
2016, VOBA	39
2018, VOBA	32
2019, VOBA	27
2020, VOBA	24
Total, VOBA	$ 157

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Unpaid losses and loss expenses (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015		Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2004
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	$ (546)		$ (527)	$ (530)
Unallocated loss adjustment expenses due to operating expenses paid and reserved	(10,030)		(10,176)	(9,878)
A & E - loss reserves, net - closing	980		1,041
A & E - incurred activity, net	162	[1]	210
NICO reinsurance protection on losses and loss expenses	466
Incurred activity	9,484		9,649	9,348
NICO reinsurance protection on losses and loss expenses incurred on or before 12/31/1996, net of retenion	1,000
NICO retention for losses and loss expenses incurred on or before 12/31/1996	$ 721
NICO pro-rata share of reinsurance protection (percent)	75.00%
Dividend retention fund established by INA Financial Corporation	$ 50
Required minimum balance under the dividend retention fund	50
Contributions to the dividend retention fund					$ 35	$ 15
Minimum contribution from the dividend retention fund to Century not required for XOL agreement	200
Reinsurance coverage to Century provided by ACE INA under XOL	800
Statutory surplus of century	25
Century Statutory Basis Losses Cede To X O L	335
INA Holdings contibutions to Century in exchange for a surplus note							$ 100
Aggregate reinsurance balances ceded by active ACE companies to Century	1,200		1,100
Century's carried gross reserves (including reserves ceded by active ACE companies)	1,900		2,100
Insurance - Overseas General
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	(343)		(391)	(299)
Global Reinsurance
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	(119)		(63)	$ (84)
Other lines | Global Reinsurance
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	(54)
Long tail | Insurance - Overseas General
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	(166)		(181)
Long tail | Global Reinsurance
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years			(52)
Long tail | Casualty | Insurance - Overseas General
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	(140)		(102)
Long tail | Casualty | 2011 to 2013 | Insurance - Overseas General
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years			46
Long tail | Casualty | 2010 and prior | Insurance - Overseas General
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years			(148)
Long tail | Casualty | 2009 and prior | Global Reinsurance
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	(23)		(25)
Long tail | Casualty | 2010 | Insurance - Overseas General
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	(175)
Long tail | Casualty | 2014 and prior | Insurance - Overseas General
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	35
Long tail | Financial solutions business | Insurance - Overseas General
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years			(27)
Long tail | Financial solutions business | 2011 to 2013 | Insurance - Overseas General
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years			71
Long tail | Financial solutions business | 2010 and prior | Insurance - Overseas General
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years			(98)
Long tail | Other lines | Insurance - Overseas General
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	(26)		(52)
Long tail | Other lines | Global Reinsurance
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	(42)
Long tail | Professional liability, including medical malpractice | 2010 and prior | Global Reinsurance
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	(33)
Long tail | Professional liability, including medical malpractice | 2009 and prior | Global Reinsurance
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years			(34)
Short tail | Insurance - Overseas General
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	(177)		(210)
Short tail | Other lines | Global Reinsurance
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	(12)
Short tail | Other lines | 2014 and prior | Insurance - Overseas General
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	(34)
Short tail | Personal Lines | 2012 to 2013 | Insurance - Overseas General
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	(26)
Short tail | Personal Lines | 2011 to 2013 | Insurance - Overseas General
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years			(25)
Short tail | Property and inland marine lines | Insurance - Overseas General
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years			(136)
Short tail | Property and inland marine lines | 2013 and prior | Insurance - Overseas General
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	(90)
Short tail | Property and inland marine lines | 2012 and prior | Insurance - Overseas General
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years			(92)
Short tail | Property and inland marine lines | 2013 | Insurance - Overseas General
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years			(44)
Short tail | Aviation lines [Domain] | 2010 and prior | Insurance - Overseas General
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years			(30)
Insurance - Overseas General
Unpaid Losses and Loss Expenses [Line Items]
Prior period net unpaid reserves represented by prior period development (percent)				(3.80%)
Global Reinsurance
Unpaid Losses and Loss Expenses [Line Items]
Prior period net unpaid reserves represented by prior period development (percent)				(3.60%)
Brandywine
Unpaid Losses and Loss Expenses [Line Items]
A & E - loss reserves, net - closing	782		837
Westchester Specialty
Unpaid Losses and Loss Expenses [Line Items]
A & E - loss reserves, net - closing	115		119
Ace Bermuda [Member]
Unpaid Losses and Loss Expenses [Line Items]
A & E - loss reserves, net - closing	83		85
Run Off [Member] | Insurance - North American P&C
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	200		247	$ 193
Run Off [Member] | Completion of reserve review | Insurance - North American P&C
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	170		215
Run Off [Member] | unallocated LAE - run-off | Insurance - North American P&C
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	30		32
Run Off [Member] | Insurance - North American
Unpaid Losses and Loss Expenses [Line Items]
Prior period net unpaid reserves represented by prior period development (percent)				(1.20%)
Active [Member] | Insurance - North American P&C
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	(239)		(354)	$ (327)
Active [Member] | Long tail | Insurance - North American P&C
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	(169)		(298)
Active [Member] | Long tail | Directors and Officers (D&O) Portfolio | 2009 and prior | Insurance - North American P&C
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years			(104)
Active [Member] | Long tail | Excess casualty business | Insurance - North American P&C
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years			(55)
Active [Member] | Long tail | Excess casualty business | 2003 | Insurance - North American P&C
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years			(42)
Active [Member] | Long tail | Medical risk operations | 2009 to 2010 | Insurance - North American P&C
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years			(40)
Active [Member] | Long tail | Financial solutions business | 2010 and prior | Insurance - North American P&C
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years			(35)
Active [Member] | Long tail | Surety business | 2012 | Insurance - North American P&C
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years			(27)
Active [Member] | Long tail | Surety business | 2013 | Insurance - North American P&C
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	(24)
Active [Member] | Long tail | Other lines | Insurance - North American P&C
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years			(48)
Active [Member] | Long tail | Auto Liability Excess Lines | Insurance - North American P&C
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	(32)
Active [Member] | Long tail | Auto Liability Excess Lines | 2009 | Insurance - North American P&C
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years			(21)
Active [Member] | Long tail | Workers Compensation [Domain] | 2013 and prior | Insurance - North American P&C
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years			32
Active [Member] | Long tail | Workers Compensation [Domain] | 2009 and prior | Insurance - North American P&C
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	29
Active [Member] | Long tail | Workers Compensation [Domain] | 2014 | Insurance - North American P&C
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	(21)
Active [Member] | Long tail | Workers Compensation [Domain] | 2014 and prior | Insurance - North American P&C
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	(52)
Active [Member] | Long tail | General Liability [Member] | 2010 | Insurance - North American P&C
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	(26)
Active [Member] | Long tail | Management And Professional Liability Lines [Member] | 2010 and prior | Insurance - North American P&C
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	(108)
Active [Member] | Long tail | Commercial Excess Lines [Member] | 2010 and prior | Insurance - North American P&C
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	33
Active [Member] | Short tail | Insurance - North American P&C
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	(70)		(56)
Active [Member] | Short tail | Insurance - North American Agriculture
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	(45)		34	$ (13)
Active [Member] | Short tail | Energy and Technical Risk Property | 2012 to 2013 | Insurance - North American P&C
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years			$ (20)
Active [Member] | Short tail | Excess Property Lines [Member] | 2013 | Insurance - North American P&C
Unpaid Losses and Loss Expenses [Line Items]
Net losses and loss expenses incurred in prior years	$ (34)
Active [Member] | Insurance - North American
Unpaid Losses and Loss Expenses [Line Items]
Prior period net unpaid reserves represented by prior period development (percent)				(2.10%)

[1] (1)Excludes unallocated loss expenses and the net activity reflects third-party reinsurance other than the aggregate excess of loss reinsurance provided by National Indemnity Company (NICO) to Westchester Specialty (see Westchester Specialty section below).

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Unpaid losses and loss expenses (Unpaid Losses and Loss Expenses Rollforward) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Unpaid Losses and Loss Expenses [Roll Forward]
Gross unpaid losses and loss expenses, beginning of year	$ 38,315		$ 37,443		$ 37,946
Reinsurance recoverable on unpaid losses	(11,307)	[1]	(10,612)		(11,399)
Balance at beginning of year	27,008		26,831		26,547
Acquistion of subsidiaries	417		320		86
Total	27,425		27,151		26,633
Net losses and loss expenses incurred in respect of losses incurring in Current Year	10,030		10,176		9,878
Net losses and loss expenses incurred in prior years	(546)		(527)		(530)
Total	9,484		9,649		9,348
Net losses and loss expenses incurred in respect of losses paid in Current Year	4,053		3,975		3,942
Net losses and loss expenses incurred in respect of losses paid in Prior Year	5,612		5,260		5,035
Total	9,665		9,235		8,977
Foreign currency revaluation and other	(682)		(557)		(173)
Balance at end of year	26,562		27,008		26,831
Reinsurance recoverable on unpaid losses	(10,741)	[1]	(11,307)	[1]	(10,612)
Gross unpaid losses and loss expenses, end of year	$ 37,303		$ 38,315		$ 37,443

[1] (1) Net of a provision for uncollectible reinsurance.

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Unpaid losses and loss expenses (A&E Loss Roll-forward) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015		Dec. 31, 2014
Unpaid Losses and Loss Expenses [Roll Forward]
Balance (gross) at December 31, 2014	$ 1,699
Balance (net) at December 31, 2014	1,041
Incurred activity, gross	243
Incurred activity, net	162	[1]	$ 210
Paid activity, gross	(392)
Paid activity, net	(223)
Balance (gross) at December 31, 2015	1,550		1,699
Balance (net) at December 31, 2015	980		1,041
Asbestos
Unpaid Losses and Loss Expenses [Roll Forward]
Balance (gross) at December 31, 2014	1,500
Balance (net) at December 31, 2014	892
Incurred activity, gross	125
Incurred activity, net	76
Paid activity, gross	(274)
Paid activity, net	(137)
Balance (gross) at December 31, 2015	1,351		1,500
Balance (net) at December 31, 2015	831		892
Environmental
Unpaid Losses and Loss Expenses [Roll Forward]
Balance (gross) at December 31, 2014	199
Balance (net) at December 31, 2014	149
Incurred activity, gross	118
Incurred activity, net	86
Paid activity, gross	(118)
Paid activity, net	(86)
Balance (gross) at December 31, 2015	199		199
Balance (net) at December 31, 2015	$ 149		$ 149

[1] (1)Excludes unallocated loss expenses and the net activity reflects third-party reinsurance other than the aggregate excess of loss reinsurance provided by National Indemnity Company (NICO) to Westchester Specialty (see Westchester Specialty section below).

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Unpaid losses and loss expenses (Brandywine Incurred Loss Activity) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Unpaid Losses and Loss Expenses [Roll Forward]
Balance at beginning of year	$ 27,008	$ 26,831	$ 26,547
Incurred activity	9,484	9,649	9,348
Paid activity	9,665	9,235	8,977
Balance at end of year	$ 26,562	$ 27,008	$ 26,831

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Unpaid losses and loss expenses (Westchester Incurred Loss Activity) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Unpaid Losses and Loss Expenses [Roll Forward]
Balance at beginning of year	$ 27,008	$ 26,831	$ 26,547
Incurred activity	9,484	9,649	9,348
Paid activity	9,665	9,235	8,977
Balance at end of year	$ 26,562	$ 27,008	$ 26,831

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Taxation (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Income Tax Examination [Line Items]
Valuation allowance	$ 17	$ 38	$ 17
Unrecognized tax benefits that would not affect the effective tax rate		17
Unrecognized tax benefits that would affect the effective tax rate	6	16	6
Tax-related interest and penalties reported in the consolidated statements of operations		1	(1)
Liabilities recorded for tax-related interest and penalties	9	4	$ 9
Income Tax Reconciliation, Change To Deferred Taxes Related to Unrealized Foreign Exchange Net	$ 89
Domestic Tax Authority [Member]
Income Tax Examination [Line Items]
Net operating loss carry-forwards		$ 325
Switzerland
Income Tax Examination [Line Items]
Applicable income tax rates		7.83%
Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
Foreign tax credit carry-forward		$ 142
Bermuda
Income Tax Examination [Line Items]
Applicable income tax rates		0.00%
U.S.
Income Tax Examination [Line Items]
Applicable income tax rates		35.00%
U.K.
Income Tax Examination [Line Items]
Applicable income tax rates		20.25%

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Taxation (Provision For Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Current tax expense	$ 304	$ 481	$ 231
Deferred tax expense	158	153	249
Provision for income taxes	$ 462	$ 634	$ 480

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Taxation (Reconciliation Of The Difference Between The Provision for Income Taxes and the Expected Tax Provision at Swiss Statutory Income Tax Rate) (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Expected tax provision at Swiss statutory rate			$ 258	$ 273	$ 331
Taxes on earnings subject to rates other that Swiss statutory rate			193	224	124
Income Tax Reconciliation, Change To Deferred Taxes Related To Unrealized Foreign Exchange	[1]		0	139	0
Tax exempt interest and dividends received deduction, net of proration			(32)	(33)	(27)
Net witholding taxes			35	33	27
Change in valuation allowance			2	(20)	4
Other			6	18	21
Provision for income taxes			$ 462	$ 634	$ 480
Income Tax Reconciliation, Change To Deferred Taxes Related to Unrealized Foreign Exchange Net		$ 89

[1] (1) 2014 includes a charge to deferred taxes related to non-recognition of foreign tax credits related to unrealized foreign exchange losses.

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Taxation (Components Of Net Deferred Tax Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Deferred Tax Assets, Gross [Abstract]
Loss reserve discount	$ 663	$ 794
Unearned premium reserve	190	99
Foreign tax credits	969	1,103
Investments	29	9
Provision for uncollectible balances	65	81
Loss carry-forwards	72	40
Compensation related amounts	189	185
Other	65	0
Total deferred tax assets	2,242	2,311
Deferred Tax Liabilities, Gross [Abstract]
Deferred policy acquisition costs	412	213
VOBA and other intangible assets	384	321
Un-remitted foreign earnings	827	939
Unrealized appreciation on investments	195	406
Depreciation	68	77
Deferred Tax Liabilities, Other	0	43
Total deferred tax liabilities	1,886	1,999
Valuation allowance	38	17
Net deferred tax assets	$ 318	$ 295

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Taxation (Reconciliation of Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits, beginning of year	$ 23	$ 27
Additions based on tax provisions related to the current year	1	2
Reductions for tax positions of prior years	(7)	0
Reductions for the lapse of the applicable statutes of limitations	(1)	(6)
Unrecognized Tax Benefits, end of year	$ 16	$ 23

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Debt (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Nov. 01, 2015	Oct. 01, 2015	May. 01, 2015	Mar. 01, 2015	Dec. 31, 2014	Mar. 31, 2000
Debt Instrument [Line Items]
Long-term debt stated interest rate				5.60%
Current amount of long-term debt outstanding	$ 9,447.0					$ 3,357.0
Total ACE INA debt issued in November 2015
Debt Instrument [Line Items]
Debt issued		$ 5,300.0
Senior Notes [Member]
Debt Instrument [Line Items]
Current amount of long-term debt outstanding	$ 9,447.0					3,357.0
Senior Notes [Member] | ACE INA Senior Notes Due May 2015
Debt Instrument [Line Items]
Long-term debt stated interest rate
Senior Notes [Member] | ACE INA senior notes due 2015
Debt Instrument [Line Items]
Long-term debt stated interest rate
Senior Notes [Member] | ACE INA senior notes due 2020
Debt Instrument [Line Items]
Long-term debt stated interest rate		2.30%
Debt issued		$ 1,300.0
Current amount of long-term debt outstanding		$ 1,299.0
Senior Notes [Member] | ACE INA senior notes due 2022
Debt Instrument [Line Items]
Long-term debt stated interest rate		2.875%	2.875%
Debt issued		$ 1,000.0
Current amount of long-term debt outstanding		$ 999.0
Senior Notes [Member] | ACE INA senior notes due 2025
Debt Instrument [Line Items]
Long-term debt stated interest rate					3.15%
Current amount of long-term debt outstanding					$ 800.0
Senior Notes [Member] | ACE INA Senior Notes Due March 2025
Debt Instrument [Line Items]
Debt issued					$ 800.0
Senior Notes [Member] | ACE INA senior notes due 2026
Debt Instrument [Line Items]
Long-term debt stated interest rate		3.35%
Debt issued		$ 1,500.0
Current amount of long-term debt outstanding		$ 1,496.0
Senior Notes [Member] | ACE INA senior notes due 2045
Debt Instrument [Line Items]
Long-term debt stated interest rate		4.35%
Current amount of long-term debt outstanding		$ 1,496.0
Trust Preferred Securities | ACE INA capital securities due 2030
Debt Instrument [Line Items]
Long-term debt stated interest rate	9.70%						9.70%
Debt issued	$ 309.0						$ 300.0
ACE Capital Trust II common securities purchased							$ 9.2
Senior Notes [Member] | ACE INA Senior Notes Due May 2015
Debt Instrument [Line Items]
Current amount of long-term debt outstanding						450.0
Senior Notes [Member] | ACE INA senior notes due 2015
Debt Instrument [Line Items]
Current amount of long-term debt outstanding						$ 700.0

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Debt (Schedule of Debt Outstanding) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Nov. 01, 2015	Oct. 01, 2015	May. 01, 2015	Mar. 01, 2015	Dec. 31, 2014	Mar. 31, 2000
Debt Instrument [Line Items]
Repurchase agreements	$ 1,404					$ 1,402
Short-term debt						1,150
Long-term debt	9,447					3,357
Trust preferred securities	309					309
Long-term debt stated interest rate				5.60%
Senior Notes
Debt Instrument [Line Items]
Long-term debt	9,447					3,357
Senior Notes | ACE INA senior notes due 2015
Debt Instrument [Line Items]
Short-term debt	$ 0
Long-term debt stated interest rate
Additional percentage on 'make-whole' premium
Senior Notes | ACE INA senior notes due 2015
Debt Instrument [Line Items]
Short-term debt	$ 0
Long-term debt stated interest rate
Additional percentage on 'make-whole' premium
Senior Notes | ACE INA senior notes due 2017
Debt Instrument [Line Items]
Long-term debt	$ 500					500
Long-term debt stated interest rate	5.70%
Additional percentage on 'make-whole' premium	0.20%
Senior Notes | ACE INA senior notes due 2018
Debt Instrument [Line Items]
Long-term debt	$ 300					300
Long-term debt stated interest rate	5.80%
Additional percentage on 'make-whole' premium	0.35%
Senior Notes | ACE INA senior notes due 2019
Debt Instrument [Line Items]
Long-term debt	$ 500					500
Long-term debt stated interest rate	5.90%
Additional percentage on 'make-whole' premium	0.40%
Senior Notes | ACE INA senior notes due 2020
Debt Instrument [Line Items]
Long-term debt		$ 1,299
Long-term debt stated interest rate		2.30%
Additional percentage on 'make-whole' premium		0.15%
Senior Notes | ACE INA senior notes due 2022
Debt Instrument [Line Items]
Long-term debt		$ 999
Long-term debt stated interest rate		2.875%	2.875%
Additional percentage on 'make-whole' premium		0.20%
Senior Notes | ACE INA senior notes due 2023
Debt Instrument [Line Items]
Long-term debt	$ 474					474
Long-term debt stated interest rate	2.70%
Additional percentage on 'make-whole' premium	0.10%
Senior Notes | ACE INA senior notes due May 2024
Debt Instrument [Line Items]
Long-term debt	$ 699					699
Long-term debt stated interest rate	3.35%
Additional percentage on 'make-whole' premium	0.15%
Senior Notes | ACE INA senior notes due 2025
Debt Instrument [Line Items]
Long-term debt					$ 800
Long-term debt stated interest rate					3.15%
Additional percentage on 'make-whole' premium					0.15%
Senior Notes | ACE INA senior notes due 2026
Debt Instrument [Line Items]
Long-term debt		$ 1,496
Long-term debt stated interest rate		3.35%
Additional percentage on 'make-whole' premium		0.20%
Senior Notes | ACE INA senior notes due 2036
Debt Instrument [Line Items]
Long-term debt	$ 299					299
Long-term debt stated interest rate	6.70%
Additional percentage on 'make-whole' premium	0.20%
Senior Notes | ACE INA senior notes due 2043
Debt Instrument [Line Items]
Long-term debt	$ 474					474
Long-term debt stated interest rate	4.15%
Additional percentage on 'make-whole' premium	0.15%
Senior Notes | ACE INA senior notes due 2045
Debt Instrument [Line Items]
Long-term debt		$ 1,496
Long-term debt stated interest rate		4.35%
Additional percentage on 'make-whole' premium		0.25%
Senior Notes | Other
Debt Instrument [Line Items]
Long-term debt	$ 11					11
Senior secured debentures | ACE INA debentures due 2029
Debt Instrument [Line Items]
Long-term debt	$ 100					100
Long-term debt stated interest rate	8.875%
Trust Preferred Securities | ACE INA capital securities due 2030
Debt Instrument [Line Items]
Trust preferred securities	$ 309					309
Long-term debt stated interest rate	9.70%						9.70%
Repurchase agreements
Debt Instrument [Line Items]
Short-term debt	$ 1,404					$ 1,402
Weighted average interest rate on short-term debt	0.60%					0.30%
Senior Notes | ACE INA senior notes due 2015
Debt Instrument [Line Items]
Long-term debt						$ 450
Senior Notes | ACE INA senior notes due 2015
Debt Instrument [Line Items]
Long-term debt						$ 700
Minimum | Senior Notes | Other
Debt Instrument [Line Items]
Long-term debt stated interest rate	2.75%
Maximum | Senior Notes | Other
Debt Instrument [Line Items]
Long-term debt stated interest rate	7.10%

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Commitments, contingencies, and guarantees (Narrative) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Commitments Contingencies And Guarantees [Line Items]
Derivative Asset, Fair Value, Amount Offset Against Collateral	$ 1
Derivative Liability, Fair Value, Amount Offset Against Collateral		$ 34
Repurchase agreements	1,404	1,402
Securities lending payable	1,047	1,331
Securities lending collateral	1,046	$ 1,330
Approximate percentage of gross premiums written that were generated from or placed by Marsh		10.00%	11.00%
Carrying value of limited partnerships and partially-owned investment companies included in other investments	2,200
Funding commitments relating to limited partnerships and partially-owned investment companies	824
Total rental expense related to operating leases	126	$ 127	$ 128
Purchase Commitment, Remaining Minimum Amount Committed	255
Letter of Credit [Member]
Commitments Contingencies And Guarantees [Line Items]
Line of Credit Facility, Current Borrowing Capacity	1,500
Letter Of Credit Unsecured Expiring November 2017 | Letter of Credit [Member]
Commitments Contingencies And Guarantees [Line Items]
Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases	300
Line of Credit Facility, Amount Outstanding	$ 797

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Commitments, contingencies, and guarantees (Balance Sheet Locations, Fair Values In Asset Or (Liability) Position, And Notional Values/Payment Provisions Of Derivative Instruments) (Detail) - USD ($) $ in Millions		Dec. 31, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Notional Value/Payment Provision		$ 1,915	$ 5,794
Foreign Exchange Future [Member]
Derivatives, Fair Value [Line Items]
Notional Value/Payment Provision		1,029	1,329
Cross Currency Swap [Member]
Derivatives, Fair Value [Line Items]
Notional Value/Payment Provision		95	95
Futures Contracts On Money Market Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Value/Payment Provision		0	2,467
Futures contracts on notes and bonds [Member]
Derivatives, Fair Value [Line Items]
Notional Value/Payment Provision		751	1,636
Convertibles and Bonds with Warrants Attached [Member]
Derivatives, Fair Value [Line Items]
Notional Value/Payment Provision	[1]	40	267
Single-Stock Future [Member]
Derivatives, Fair Value [Line Items]
Notional Value/Payment Provision	[2]	1,197	1,384
Options On Equity Market Indices [Member]
Derivatives, Fair Value [Line Items]
Notional Value/Payment Provision	[2]	0	250
Other
Derivatives, Fair Value [Line Items]
Notional Value/Payment Provision		15	10
Other Derivative Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Value/Payment Provision		1,212	1,644
Guaranteed Living Benefits [Member]
Derivatives, Fair Value [Line Items]
Notional Value/Payment Provision	[3]	1,155	675
Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		43	309
Other Assets [Member] | Foreign Exchange Future [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		7	12
Other Assets [Member] | Cross Currency Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		0	0
Other Assets [Member] | Futures Contracts On Money Market Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		0	0
Other Assets [Member] | Futures contracts on notes and bonds [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		5	6
Other Assets [Member] | Single-Stock Future [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset	[2]	0	0
Other Assets [Member] | Options On Equity Market Indices [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset	[2]	0	2
Other Assets [Member] | Other
Derivatives, Fair Value [Line Items]
Derivative Asset		0	0
Other Assets [Member] | Other Derivative Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		0	2
Other Assets [Member] | Guaranteed Living Benefits [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset	[3]	0	0
Accounts Payable, Accrued Expenses, And Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability		(13)	(36)
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Foreign Exchange Future [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability		(11)	(7)
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Cross Currency Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability		0	0
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Futures Contracts On Money Market Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability		0	0
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Futures contracts on notes and bonds [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability		(2)	(29)
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Convertibles and Bonds with Warrants Attached [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability	[1]	0	0
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Single-Stock Future [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability	[2]	(4)	(21)
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Options On Equity Market Indices [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability	[2]	0	0
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Other
Derivatives, Fair Value [Line Items]
Derivative Liability		(6)	(4)
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Other Derivative Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability		(10)	(25)
Fixed Maturities Available For Sale [Member] | Convertibles and Bonds with Warrants Attached [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset	[1]	31	291
Accounts Payable Future Policy Benefits [Member] | Guaranteed Living Benefits [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability	[3]	$ (888)	$ (663)

[1] (1)Includes fair value of embedded derivatives.

[2] (2) Related to GMDB and GLB blocks of business.

[3] (3) Includes both future policy benefits reserves and fair value derivative adjustment. Refer to Note 5 c) for additional information. Note that the payment provision related to GLB is the net amount at risk. The concept of a notional value does not apply to the GLB reinsurance contracts.

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Commitments, contingencies, and guarantees (Net Realized Gains (Losses) Of Derivative Instrument Activity In Consolidated Statement Of Operations) (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Commitments Contingencies And Guarantees [Line Items]
Net realized gains (losses)		$ (193)	$ (442)	$ 375
Foreign Exchange Future [Member]
Commitments Contingencies And Guarantees [Line Items]
Net realized gains (losses)		31	29	11
All Other Futures Contracts And Options [Member]
Commitments Contingencies And Guarantees [Line Items]
Net realized gains (losses)		9	(118)	61
Convertibles and Bonds with Warrants Attached [Member]
Commitments Contingencies And Guarantees [Line Items]
Net realized gains (losses)	[1]	(8)	(18)	6
Investment And Embedded Derivative Instruments [Member]
Commitments Contingencies And Guarantees [Line Items]
Net realized gains (losses)		32	(107)	78
Guaranteed Living Benefits [Member]
Commitments Contingencies And Guarantees [Line Items]
Net realized gains (losses)	[2]	(203)	(217)	878
Single-Stock Future [Member]
Commitments Contingencies And Guarantees [Line Items]
Net realized gains (losses)	[3]	(8)	(164)	(555)
Options On Equity Market Indices [Member]
Commitments Contingencies And Guarantees [Line Items]
Net realized gains (losses)	[3]	(2)	(4)	(24)
Other Derivatives
Commitments Contingencies And Guarantees [Line Items]
Net realized gains (losses)		(12)	50	(2)
Guaranteed Living Benefit And Other Derivative Instruments [Member]
Commitments Contingencies And Guarantees [Line Items]
Net realized gains (losses)		$ (225)	$ (335)	$ 297

[1] 1) Includes embedded derivatives.

[2] (2) Excludes foreign exchange gains (losses) related to GLB.

[3] (3) Related to GMDB and GLB blocks of business.

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Commitments, contingencies, and guarantees (Future Minimum Lease Payments) (Details) $ in Millions	Dec. 31, 2015 USD ($)
Commitments and Contingencies Disclosure [Abstract]
2016	$ 111
2017	93
2018	72
2019	54
2020	43
Thereafter	86
Total minimum future lease commitments	$ 459

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Commitments, contingencies, and guarantees Commitments, Contingencies, And Guarantees (Transactions accounted for as secured borrowings) (Details) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Document Period End Date	Dec. 31, 2015
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements	$ 1,459
Securities lending collateral	1,046	$ 1,330
Securities lending payable	1,047	$ 1,331
Cash and Cash Equivalents [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements	34
Mortgage backed-securities
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements	1,188
Repurchase Agreements [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Secured Borrowings, Gross, Difference, Amount	55
U.S. Treasury and agency
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements	237
Maturity Overnight [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Secured Borrowings, Gross, Difference, Amount	(1)
Maturity Overnight [Member] | Cash and Cash Equivalents [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending collateral	424
Maturity Overnight [Member] | U.S. Treasury and agency
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending collateral	67
Maturity Overnight [Member] | Foreign Government Debt [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending collateral	296
Maturity Overnight [Member] | Corporate securities
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending collateral	2
Maturity Overnight [Member] | Equity securities
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending collateral	257
Maturity Less than 30 Days [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements	405
Maturity Less than 30 Days [Member] | Cash and Cash Equivalents [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements	34
Maturity Less than 30 Days [Member] | Mortgage backed-securities
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements	365
Maturity Less than 30 Days [Member] | U.S. Treasury and agency
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements	6
Maturity 30 to 90 Days [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements	480
Maturity 30 to 90 Days [Member] | Cash and Cash Equivalents [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements	0
Maturity 30 to 90 Days [Member] | Mortgage backed-securities
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements	480
Maturity 30 to 90 Days [Member] | U.S. Treasury and agency
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements	0
Maturity Greater than 90 Days [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements	574
Maturity Greater than 90 Days [Member] | Cash and Cash Equivalents [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements	0
Maturity Greater than 90 Days [Member] | Mortgage backed-securities
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements	343
Maturity Greater than 90 Days [Member] | U.S. Treasury and agency
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements	$ 231

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Shareholders' equity (Detail) $ / shares in Units, $ in Millions		12 Months Ended
	Jan. 14, 2016 shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2015 SFr / shares shares	Dec. 31, 2014 USD ($) $ / shares shares	Dec. 31, 2014 SFr / shares shares	Dec. 31, 2013 USD ($) $ / shares shares	Dec. 31, 2013 SFr / shares shares	May. 31, 2015 $ / shares	Jan. 01, 2015 USD ($)	May. 31, 2014 $ / shares	Nov. 30, 2013 USD ($)	May. 31, 2013 $ / shares
Stockholders' Equity Note [Abstract]
Dividend installments | $ / shares		$ 0.67		$ 0.65		$ 0.51
Increase to dividend approved by shareholders in January | $ / shares				0.12
Common shares in treasury, shares			18,268,971		14,172,726	3,038,477	3,038,477
Conditional Share Issuance, by Scenario [Line Items]
Common Shares, par value | SFr / shares			SFr 24.15		SFr 24.77
Par Value Reduction | (per share)		0.65	0.62	2.46	2.27	$ 2.02	SFr 1.85
Dividends Declared From Additional Paid In Capital | (per share)		$ 2.01	SFr 1.94	0.24	0.20	0	0
Annual dividend per share approved by shareholders | $ / shares								$ 2.68		$ 2.60		$ 2.04
The number of votes associated with one Common Share		1
The maximum ownership percentage for voting allowed for any one shareholder			10.00%
Dividends declared per common share | (per share)		$ 2.66	SFr 2.56	$ 2.70	SFr 2.47	$ 2.02	SFr 1.85
General Purpose
Conditional Share Issuance, by Scenario [Line Items]
Authorized share capital for general purposes			28,048,548
Issuance of Debt
Conditional Share Issuance, by Scenario [Line Items]
Authorized share capital for general purposes			33,000,000
Employee Benefit Plans
Conditional Share Issuance, by Scenario [Line Items]
Authorized share capital for general purposes			25,410,929
November 2013 Stock Repurchase Plan [Member]
Conditional Share Issuance, by Scenario [Line Items]
Repurchase of outstanding common shares, shares		6,677,663		13,982,358		3,266,531
Cost of shares acquired | $		$ 734		$ 1,449		$ 290
Stock repurchase program authorized amount | $											$ 2,000
2015 Stock Repurchase Plan [Member]
Conditional Share Issuance, by Scenario [Line Items]
Stock repurchase program authorized amount | $									$ 1,500
Subsequent Event [Member]
Conditional Share Issuance, by Scenario [Line Items]
Shares issued in connection with Chubb acquisition	137,000,000

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Shareholders' equity (Rollforward Of Changes In Common Stock Shares Issued And Outstanding) (Details) - shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Stockholders' Equity Note [Abstract]
Shares issued, beginning of year	342,832,412	342,832,412
Shares issued, end of year	342,832,412	342,832,412	342,832,412
Common Shares in treasury, end of year	(18,268,971)	(14,172,726)	(3,038,477)
Shares issued and outstanding, end of year	324,563,441	328,659,686	339,793,935
Balance, beginning of year	(9,467)	(9,467)	(9,467)
Shares redeemed	3,667	0	0
Balance, end of year	(5,800)	(9,467)	(9,467)

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Share-based compensation (Narrative) (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2004
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to the unvested share-based awards	$ 175,000,000
Weighted-average expected recognition period for the unrecognized compensation expense	1 year
Weighted average remaining contractual term for stock options outstanding	6 years
Weighted-average remaining contractual term for stock options exercisable	4 years 8 months 20 days
Cash received from exercise of stock options	$ 86,000,000
Restricted stock awards granted to non-management directors	24,945.00	25,339	20,969
Amounts paid during period by employees for the purchase of shares under the ESPP	$ 18,000,000	$ 17,000,000	$ 14,000,000
Number of shares purchased during period by employees pursuant to the provisions of the ESPP	197,442	181,901	175,437
Discounted purchase price from market price	85.00%
Annual estimate of forfeitures for equity awards	6.50%	6.50%	6.50%
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of award	3 years
Stock option term in years	10 years
Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units awarded to employees and officers of ACE and subsidiaries during period	1,124,143	1,295,734	1,347,679
Weighted average grant-day fair value of restricted stock units granted to employees and officers of the company (US$ per share)	$ 114.28	$ 97.04	$ 85.61
Number of unvested restricted stock units outstanding	2,825,757	3,193,518	3,511,690	4,015,732
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units awarded to employees and officers of ACE and subsidiaries during period	293,822	300,511	271,004
Weighted average grant-day fair value of restricted stock units granted to employees and officers of the company (US$ per share)	$ 114.71	$ 97.66	$ 85.44
Number of unvested restricted stock units outstanding	663,412
Number of deferred restricted stock units	145,751
ACE Limited 2004 Long-Term Incentive Plan | Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of award	4 years
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Stock Purchase Plan Authorized Amount	$ 25,000
Discounted purchase price from market price	85.00%
Common shares | ACE Limited 2004 Long-Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares authorized for issuance under plan					38,600,000
Common shares remaining as available for issuance under the ESPP	4,617,796
Increase to authorized shares approved by shareholders	8,000,000
Common shares | ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares authorized for issuance under plan					4,500,000
Common shares remaining as available for issuance under the ESPP	934,243

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Share-based compensation (Pre-tax and After-tax Share-based Compensation Expense) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restricted stock
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense, pre-tax		$ 143	$ 128	$ 153
Share-based compensation expense, after-tax		84	75	89
Stock options
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense, pre-tax		31	28	24
Share-based compensation expense, after-tax	[1]	21	19	18
Additional Paid-in Capital
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities		$ 26	$ 28	$ 36

[1] (1) Excludes windfall tax benefit for share-based compensation recognized as a direct adjustment to Additional paid-in capital of $26 million, $28 million and $36 million for the years ended December 31, 2015, 2014 and 2013, respectively.

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Share-based compensation (Weighted Average Assumptions for Option Grants) (Details) - Options	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield	2.30%	2.70%	2.40%
Expected volatility	21.00%	25.20%	27.80%
Risk-free interest rate	1.70%	1.70%	1.00%
Expected life	5 years 9 months 18 days	5 years 9 months 18 days	5 years 9 months 18 days

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Share-based compensation (Rollforward Of Company's Stock Options) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Number of Options [Roll Forward]
Number of option outstanding, beginning of period	9,623,986	9,496,856	9,449,659
Number of options granted	1,892,641	1,782,903	1,821,063
Number of options exercised	(1,457,580)	(1,511,948)	(1,658,671)
Number of options forfeited	(205,551)	(143,825)	(115,195)
Number of option outstanding, end of period	9,853,496	9,623,986	9,496,856
Number of options exercisable, December 31, 2015	6,424,800
Weighted-Average Exercise Price [Roll Forward]
Weighted-average exercise price of options outstanding, beginning of period (US$ oer share)	$ 69.06	$ 61.84	$ 55.03
Weighted-average exercise price of options granted (US$ per share)	114.78	96.77	85.41
Weighted-average exercise price of options exercised (US$ per share)	60.88	54.84	48.17
Weighted average exercise price of options forfeited (US$ per share)	100.25	84.52	72.50
Weighted-average exercise price of options outstanding, end of period (US$ oer share	78.40	69.06	61.84
Weighted average exercise price of options exercisable, December 31, 2015 (US$ per share)	64.45
Options, Weighted-Average Fair Value and Total Intrinsic Value [Abstract]
Weighted-average fair value of stock options granted (US$ per share)	$ 18.49	$ 18.00	$ 17.29
Total intrinsic value of options exercised	$ 72	$ 73	$ 70
Total intrinsic value of options outstanding	379
Total intrinsic value of options exercisable, December 31, 2015	$ 337

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Share-based compensation (Rollforward Of Company's Restricted Stock) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restricted stock
Number of Restricted Stock [Roll Forward]
Number of unvested restricted stock, beginning of period	3,193,518	3,511,690	4,015,732
Number of restricted stock, granted	1,124,143	1,295,734	1,347,679
Number of restricted stock, vested and issued	(1,299,895)	(1,468,894)	(1,715,414)
Number of restricted stock, forfeited	(192,009)	(145,012)	(136,307)
Number of unvested restricted stock, end of period	2,825,757	3,193,518	3,511,690
Weighted-Average Grant-Day Fair Value [Roll Forward]
Weighted average grant-day fair value of unvested restricted stock outstanding, beginning of period (US$ per share)	$ 82.91	$ 71.42	$ 59.51
Weighted average grant-day fair value of restricted stock, granted (US$ per share)	114.28	97.04	85.61
Weighted average grant-day fair value of restricted stock, vested and issued (US$ per share)	79.49	68.00	54.97
Weighted average grant-day fair value of restricted stock, forfeited (US$ per share)	95.54	81.73	67.68
Weighted average grant-day fair value of unvested restricted stock outstanding, end of period (US$ per share)	$ 96.10	$ 82.91	$ 71.42
Performance Shares
Number of Restricted Stock [Roll Forward]
Number of unvested restricted stock, beginning of period	378,690	196,497	239,115
Number of restricted stock, granted	326,860	374,202	196,806
Number of restricted stock, vested and issued	(110,340)	(192,009)	(236,080)
Number of restricted stock, forfeited	0	0	(3,344)
Number of unvested restricted stock, end of period	595,210	378,690	196,497
Weighted-Average Grant-Day Fair Value [Roll Forward]
Weighted average grant-day fair value of unvested restricted stock outstanding, beginning of period (US$ per share)	$ 90.87	$ 71.35	$ 59.94
Weighted average grant-day fair value of restricted stock, granted (US$ per share)	113.29	98.31	89.90
Weighted average grant-day fair value of restricted stock, vested and issued (US$ per share)	98.70	85.39	75.29
Weighted average grant-day fair value of restricted stock, forfeited (US$ per share)	0.00	0.00	69.39
Weighted average grant-day fair value of unvested restricted stock outstanding, end of period (US$ per share)	$ 101.73	$ 90.87	$ 71.35

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Pension plans (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]
Expenses recognized during period under the defined contributions plans	$ 117	$ 119	$ 111
Fair value of plan assets	573	588
Projected benefit obligation	569	594
Funded status of plan	4	(6)
Defined pension plan contribution expected for 2016	4
Estimated net actuarial loss expected to be amortized from AOCI	2
Benefit payments made during period	$ 29	$ 24

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Pension plans (Schedule of Expected Future Benefit Payments) (Details) $ in Millions	Dec. 31, 2015 USD ($)
Compensation and Retirement Disclosure [Abstract]
2016	$ 20
2017	20
2018	23
2019	24
2020	24
2021-2025	$ 126

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Other (income) expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other Income and Expenses [Abstract]
Amortization of Intangible Assets	$ 171	$ 108	$ 95
Equity in net (income) loss of partially-owned entities	(113)	(231)	(119)
(Gains) losses from fair value changes in separate account assets	19	(2)	(16)
Federal excise and capital taxes	19	20	24
Acquisition-related costs (1)	9	15	4
Other	15	8	27
Other (income) expense	$ (51)	$ (190)	$ (80)

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Chubb integration expenses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Chubb Integration Expenses [Abstract]
Chubb integration expenses	$ 33	$ 0	$ 0

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Segment Information (Operations By Segment) (Detail) - USD ($) $ in Millions	3 Months Ended									12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014		Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Net premiums written										$ 17,713	$ 17,799	$ 17,025
Net premiums earned	$ 4,207	$ 4,719	$ 4,360	$ 3,927		$ 4,370	$ 4,754	$ 4,332	$ 3,970	17,213	17,426	16,613
Losses and loss expenses	2,302	2,643	2,417	2,122		2,416	2,684	2,388	2,161	9,484	9,649	9,348
Policy benefits	159	89	153	142		134	125	144	114	543	517	515
Policy acquisition costs										2,941	3,075	2,659
Administrative expenses										2,270	2,245	2,211
Underwriting income (loss)										1,975	1,940	1,880
Net investment income	532	549	562	551		577	566	556	553	2,194	2,252	2,144
Net realized gains (losses) including OTTI	(60)	(397)	126	(89)		(210)	(120)	(73)	(104)	(420)	(507)	504
Interest expense										300	280	275
Other (income) expense										(51)	(190)	(80)
Amortization of Intangible Assets										171	108	95
Chubb integration expenses										33	0	0
(Gains) losses from fair value changes in separate account assets										19	(2)	(16)
Other										(70)	(188)	(64)
Income tax expense (benefit)										462	634	480
Net income (loss)	$ 683	$ 528	$ 942	$ 681	[1]	$ 555	$ 785	$ 779	$ 734	2,834	2,853	3,758
Insurance - North American Agriculture
Segment Reporting Information [Line Items]
Underwriting Income Including Gains Related to Crop Derivatives										197
Crop Derivative Gain or Loss										9
Net premiums written										1,346	1,590	1,627
Net premiums earned										1,364	1,526	1,678
Losses and loss expenses										1,088	1,351	1,524
Policy benefits										0	0
Policy acquisition costs										69	81	53
Administrative expenses										1	9	11
Underwriting income (loss)										206	85	90
Net investment income										23	26	26
Net realized gains (losses) including OTTI										(8)	54	1
Interest expense										0	0	1
Amortization of Intangible Assets										30	31	32
Chubb integration expenses										0
(Gains) losses from fair value changes in separate account assets										0	0	0
Other										1	2	0
Income tax expense (benefit)										40	33	20
Net income (loss)										150	99	64
Insurance - Overseas General
Segment Reporting Information [Line Items]
Net premiums written										6,634	6,999	6,520
Net premiums earned										6,471	6,805	6,333
Losses and loss expenses										3,052	3,189	3,062
Policy acquisition costs										1,581	1,625	1,453
Administrative expenses										997	1,026	1,008
Underwriting income (loss)										841	965	810
Net investment income										534	545	539
Net realized gains (losses) including OTTI										(38)	(78)	18
Interest expense										8	6	5
Amortization of Intangible Assets										61	74	60
Chubb integration expenses										0
Other										(16)	(63)	(21)
Income tax expense (benefit)										232	378	222
Net income (loss)										1,052	1,037	1,101
Global Reinsurance
Segment Reporting Information [Line Items]
Net premiums written										828	935	991
Net premiums earned										849	1,026	976
Losses and loss expenses										290	431	396
Policy acquisition costs										214	257	197
Administrative expenses										49	54	50
Underwriting income (loss)										296	284	333
Net investment income										300	316	280
Net realized gains (losses) including OTTI										(32)	(29)	53
Interest expense										5	4	5
Amortization of Intangible Assets										0	0	0
Chubb integration expenses										0
Other										(6)	(54)	(19)
Income tax expense (benefit)										26	38	36
Net income (loss)										539	583	644
Life
Segment Reporting Information [Line Items]
Management underwriting income loss Insurance										282
Net premiums written										1,998	2,012	1,972
Net premiums earned										1,947	1,962	1,905
Losses and loss expenses										601	589	582
Policy benefits										543	517	515
Policy acquisition costs										476	478	358
Administrative expenses										291	285	343
Underwriting income (loss)										36	93	107
Net investment income										265	268	251
Net realized gains (losses) including OTTI										(229)	(383)	360
Interest expense										5	11	15
Amortization of Intangible Assets										2	3	3
Chubb integration expenses										0
(Gains) losses from fair value changes in separate account assets										19	(2)	(16)
Other										(39)	(1)	10
Income tax expense (benefit)										30	46	34
Net income (loss)										55	(79)	672
Corporate and Other
Segment Reporting Information [Line Items]
Losses and loss expenses										3	3	8
Policy acquisition costs										1	0	1
Administrative expenses										184	193	198
Underwriting income (loss)										(188)	(196)	(207)
Net investment income										16	12	27
Net realized gains (losses) including OTTI										(5)	(4)
Interest expense										280	250	244
Amortization of Intangible Assets										0	0	0
Chubb integration expenses										33
Other										19	29	24
Income tax expense (benefit)										(182)	(167)	(179)
Net income (loss)										(327)	(300)	(269)
Insurance - North American P&C
Segment Reporting Information [Line Items]
Net premiums written										6,907	6,263	5,915
Net premiums earned										6,582	6,107	5,721
Losses and loss expenses										4,450	4,086	3,776
Policy benefits										0	0
Policy acquisition costs										600	634	597
Administrative expenses										748	678	601
Underwriting income (loss)										784	709	747
Net investment income										1,056	1,085	1,021
Net realized gains (losses) including OTTI										(108)	(67)	72
Interest expense										2	9	5
Amortization of Intangible Assets										78	0	0
Chubb integration expenses										0
(Gains) losses from fair value changes in separate account assets										0	0	0
Other										(29)	(101)	(58)
Income tax expense (benefit)										316	306	347
Net income (loss)										$ 1,365	$ 1,513	$ 1,546

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Segment Information (Net Premiums Earned For Segment By Product) (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Net premiums earned	$ 4,207	$ 4,719	$ 4,360	$ 3,927	$ 4,370	$ 4,754	$ 4,332	$ 3,970	$ 17,213	$ 17,426	$ 16,613
Property and all other
Segment Reporting Information [Line Items]
Net premiums earned									6,586	6,687	6,382
Casualty Insurance Product Line [Member]
Segment Reporting Information [Line Items]
Net premiums earned									6,195	6,080	5,759
Life Accident And Health Product Line [Member]
Segment Reporting Information [Line Items]
Net premiums earned									4,432	4,659	4,472
Insurance - North American P&C
Segment Reporting Information [Line Items]
Net premiums earned									6,582	6,107	5,721
Insurance - North American P&C | Property and all other
Segment Reporting Information [Line Items]
Net premiums earned									1,931	1,662	1,489
Insurance - North American P&C | Casualty Insurance Product Line [Member]
Segment Reporting Information [Line Items]
Net premiums earned									4,232	4,032	3,847
Insurance - North American P&C | Life Accident And Health Product Line [Member]
Segment Reporting Information [Line Items]
Net premiums earned									419	413	385
Insurance - North American Agriculture
Segment Reporting Information [Line Items]
Net premiums earned									1,364	1,526	1,678
Insurance - North American Agriculture | Property and all other
Segment Reporting Information [Line Items]
Net premiums earned									1,364	1,526	1,678
Insurance - Overseas General
Segment Reporting Information [Line Items]
Net premiums earned									6,471	6,805	6,333
Insurance - Overseas General | Property and all other
Segment Reporting Information [Line Items]
Net premiums earned									2,868	2,948	2,672
Insurance - Overseas General | Casualty Insurance Product Line [Member]
Segment Reporting Information [Line Items]
Net premiums earned									1,537	1,573	1,479
Insurance - Overseas General | Life Accident And Health Product Line [Member]
Segment Reporting Information [Line Items]
Net premiums earned									2,066	2,284	2,182
Global Reinsurance
Segment Reporting Information [Line Items]
Net premiums earned									849	1,026	976
Global Reinsurance | Property and all other
Segment Reporting Information [Line Items]
Net premiums earned									423	551	543
Global Reinsurance | Casualty Insurance Product Line [Member]
Segment Reporting Information [Line Items]
Net premiums earned									426	475	433
Life
Segment Reporting Information [Line Items]
Net premiums earned									1,947	1,962	1,905
Life | Property and all other
Segment Reporting Information [Line Items]
Net premiums earned									0	0	0
Life | Casualty Insurance Product Line [Member]
Segment Reporting Information [Line Items]
Net premiums earned									0	0	0
Life | Life Accident And Health Product Line [Member]
Segment Reporting Information [Line Items]
Net premiums earned									$ 1,947	$ 1,962	$ 1,905

XML

Segment Information (Net Premiums Earned By Geographic Region) (Details)

12 Months Ended

Dec. 31, 2015

Dec. 31, 2014

Dec. 31, 2013

Segment Reporting Information [Line Items]

Net Premiums Earned by Geographic Region

	North America				Asia  Pacific/Far East		Latin America
Years Ended December 31			Europe(1)
2015	60	%	15	%	15	%	10	%
2014	58	%	16	%	16	%	10	%
2013	58	%	17	%	16	%	9	%

North America [Member]

Segment Reporting Information [Line Items]

Percentage of net premiums earned by geographic region

60.00%

58.00%

58.00%

Europe [Member]

Segment Reporting Information [Line Items]

Percentage of net premiums earned by geographic region

^[1]

15.00%

16.00%

17.00%

Asia Pacific and Far East [Member]

Segment Reporting Information [Line Items]

Percentage of net premiums earned by geographic region

15.00%

16.00%

16.00%

Latin America [Member]

Segment Reporting Information [Line Items]

Percentage of net premiums earned by geographic region

10.00%

10.00%

9.00%

[1] (1) Europe includes Eurasia and Africa region.

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Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended									12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014		Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Net income	$ 683	$ 528	$ 942	$ 681	[1]	$ 555	$ 785	$ 779	$ 734	$ 2,834	$ 2,853	$ 3,758
Weighted-average shares outstanding										325,589,361	335,609,899	340,906,490
Share-based compensation plans										3,246,017	3,376,388	3,241,085
Adjusted weighted-average shares outstanding and assumed conversions										328,835,378	338,986,287	344,147,575
Basic earnings per share	$ 2.10	$ 1.63	$ 2.89	$ 2.08		$ 1.68	$ 2.35	$ 2.30	$ 2.16	$ 8.71	$ 8.50	$ 11.02
Diluted earnings per share	$ 2.08	$ 1.62	$ 2.86	$ 2.05		$ 1.66	$ 2.32	$ 2.28	$ 2.14	$ 8.62	$ 8.42	$ 10.92
Potential anti-dilutive share conversions										1,601,668	1,024,788	1,031,297

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Related party transaction (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Related Party Transaction [Line Items]
Document Period End Date									Dec. 31, 2015
Net premiums written									$ 17,713	$ 17,799	$ 17,025
Losses and loss expenses	$ 2,302	$ 2,643	$ 2,417	$ 2,122	$ 2,416	$ 2,684	$ 2,388	$ 2,161	9,484	9,649	9,348
Insurance and reinsurance balances payable	4,095								4,270	4,095
Reinsurance recoverable on losses and loss expenses	11,992								11,386	11,992
Ceded Premiums Written									6,098	5,591	5,803
Minimum Amount of Program Business to be Written to Earn Profit Sharing									20
Starr Technical Risk Agency and Affiliates [Member]
Related Party Transaction [Line Items]
Net commissions									41	43	42
Losses and loss expenses									137
Insurance and reinsurance balances payable	21								18	21
Reinsurance recoverable on losses and loss expenses	101								112	101
Gross premiums written									305	314	307
Ceded Premiums Written									78	84	$ 86
ACE Foundation Bermuda [Member]
Related Party Transaction [Line Items]
ACE Foundation - Bermuda-Loan	$ 25								$ 24	$ 25

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Statutory Financial Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statutory Accounting Practices [Line Items]
Dividends available to be paid	$ 4,100
Approximate increase in statutory capital and surplus resulting from discount of certain A&E liabilities	144	$ 158
Minimum statutory capital and surplus required to satisfy regulatory requirements	14,500	14,800
PropertyAndCasualtySubsidiaries [Member]
Statutory Accounting Practices [Line Items]
Statutory capital and surplus	20,072	25,805
Statutory net income	2,770	3,378	$ 3,333
LifeSubsidiaries [Member] [Member]
Statutory Accounting Practices [Line Items]
Statutory capital and surplus	1,216	1,463
Statutory net income	$ (148)	$ (248)	$ 409

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Information provided in connection with outstanding debt of subsidiaries (Condensed Consolidating Balance Sheet) (Detail) - USD ($) $ in Millions		Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Condensed Financial Statements, Captions [Line Items]
Investments		$ 66,251		$ 62,904
Cash		1,775	[1],[2]	655	[1],[3],[4]	$ 579	[3],[5]	$ 615	[5]
Insurance and reinsurance balances receivable		5,323		5,426
Reinsurance recoverable on losses and loss expenses		11,386		11,992
Reinsurance recoverable on policy benefits		187		217
Value of business acquired		395		466
Goodwill and other intangible assets		5,683		5,724
Other assets		11,366		10,864
Total assets		102,366		98,248
Unpaid losses and loss expenses		37,303		38,315		37,443		37,946
Unearned premiums		8,439		8,222
Future policy benefits		4,807		4,754
Bank Overdrafts	[4]			0
Repurchase agreements		1,404		1,402
Short-term debt				1,150
Long-term debt		9,447		3,357
Trust preferred securities		309		309
Other liabilities		11,522		11,152
Total liabilities		73,231		68,661
Total shareholders' equity		29,135		29,587		28,825
Total liabilities and shareholders’ equity		102,366		98,248
ACE limited (Parent Gurantor)
Condensed Financial Statements, Captions [Line Items]
Investments		28		30
Cash		1	[1],[2]	0		0	[5]	103	[5]
Investments in subsidiaries		29,612		29,497
Due from subsidiaries and affiliates, net		644		583
Other assets		8		4
Total assets		30,293		30,114
Bank Overdrafts		882	[2]	246	[4]
Other liabilities		276		281
Total liabilities		1,158		527
Total shareholders' equity		29,135		29,587
Total liabilities and shareholders’ equity		30,293		30,114
ACE INA Holdings Inc. (Subsidiary Issuer)
Condensed Financial Statements, Captions [Line Items]
Investments		7,839		225
Cash		2	[1],[2]	1	[1],[3],[4]	16	[5]	2	[5]
Investments in subsidiaries		18,386		18,762
Due from subsidiaries and affiliates, net		1,800
Other assets		517		295
Total assets		28,544		19,283
Due to subsidiaries and affiliates, net				422
Bank Overdrafts		89	[2]	309	[4]
Short-term debt				1,150
Long-term debt		9,436		3,345
Trust preferred securities		309		309
Other liabilities		1,422		1,404
Total liabilities		11,256		6,939
Total shareholders' equity		17,288		12,344
Total liabilities and shareholders’ equity		28,544		19,283
Other ACE Limited Subsidiaries and Eliminations
Condensed Financial Statements, Captions [Line Items]
Investments		58,384		62,649
Cash		2,743	[1],[2]	1,209	[1],[3],[4]	748	[5]	859	[5]
Insurance and reinsurance balances receivable		6,075		6,178
Reinsurance recoverable on losses and loss expenses		20,124		20,992
Reinsurance recoverable on policy benefits		1,129		1,194
Value of business acquired		395		466
Goodwill and other intangible assets		5,683		5,724
Other assets		14,434		14,196
Total assets		108,967		112,608
Unpaid losses and loss expenses		45,490		46,770
Unearned premiums		10,243		9,958
Future policy benefits		5,749		5,731
Due to subsidiaries and affiliates, net		2,444		161
Repurchase agreements		1,404		1,402
Long-term debt		11		12
Other liabilities		12,916		12,659
Total liabilities		78,257		76,693
Total shareholders' equity		30,710		35,915
Total liabilities and shareholders’ equity		108,967		112,608
Consolidating Adjustments
Condensed Financial Statements, Captions [Line Items]
Cash		(971)	[1],[2]	(555)	[1],[3],[4]	$ (185)	[5]	$ (349)	[5]
Insurance and reinsurance balances receivable		(752)		(752)
Reinsurance recoverable on losses and loss expenses		(8,738)		(9,000)
Reinsurance recoverable on policy benefits		(942)		(977)
Investments in subsidiaries		(47,998)		(48,259)
Due from subsidiaries and affiliates, net		(2,444)		(583)
Other assets		(3,593)		(3,631)
Total assets		(65,438)		(63,757)
Unpaid losses and loss expenses		(8,187)		(8,455)
Unearned premiums		(1,804)		(1,736)
Future policy benefits		(942)		(977)
Due to subsidiaries and affiliates, net		(2,444)		(583)
Bank Overdrafts		(971)	[2]	(555)	[4]
Other liabilities		(3,092)		(3,192)
Total liabilities		(17,440)		(15,498)
Total shareholders' equity		(47,998)		(48,259)
Total liabilities and shareholders’ equity		$ (65,438)		$ (63,757)

[1] Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2015 and 2014, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[2] Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2015, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[3] Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2014 and 2013, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[4] Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2014, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[5] Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2013 and 2012, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

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Information provided in connection with outstanding debt of subsidiaries (Condensed Consolidating Statement Of Operations and Comprehensive Income) (Detail) - USD ($) $ in Millions	3 Months Ended									12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014		Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Information Provided In Connection With Outstanding Debt Of Subsidiaries [Line Items]
Net premiums written										$ 17,713	$ 17,799	$ 17,025
Net premiums earned	$ 4,207	$ 4,719	$ 4,360	$ 3,927		$ 4,370	$ 4,754	$ 4,332	$ 3,970	17,213	17,426	16,613
Net investment income	532	549	562	551		577	566	556	553	2,194	2,252	2,144
Net realized gains (losses) including OTTI	(60)	(397)	126	(89)		(210)	(120)	(73)	(104)	(420)	(507)	504
Losses and loss expenses	2,302	2,643	2,417	2,122		2,416	2,684	2,388	2,161	9,484	9,649	9,348
Policy benefits	159	89	153	142		134	125	144	114	543	517	515
Policy acquisition costs and administrative expenses										5,211	5,320	4,870
Interest (income) expense										300	280	275
Other (income) expense										(51)	(190)	(80)
Amortization of Intangible Assets										171	108	95
Chubb integration expenses										33	0	0
Income tax expense										462	634	480
Net income (loss)	$ 683	$ 528	$ 942	$ 681	[1]	$ 555	$ 785	$ 779	$ 734	2,834	2,853	3,758
Comprehensive income										908	2,892	2,023
ACE limited (Parent Gurantor)
Information Provided In Connection With Outstanding Debt Of Subsidiaries [Line Items]
Net premiums written												0
Net premiums earned												0
Net investment income										3	2	2
Equity in earnings of subsidiaries										2,673	2,707	3,580
Net realized gains (losses) including OTTI										0	0	0
Losses and loss expenses												0
Policy benefits												0
Policy acquisition costs and administrative expenses										63	78	60
Interest (income) expense										(32)	(35)	(32)
Other (income) expense										(208)	(201)	(221)
Amortization of Intangible Assets										0	0	0
Chubb integration expenses										3
Income tax expense										16	14	17
Net income (loss)										2,834	2,853	3,758
Comprehensive income										908	2,892	2,023
ACE INA Holdings Inc. (Subsidiary Issuer)
Information Provided In Connection With Outstanding Debt Of Subsidiaries [Line Items]
Net premiums written										0	0	0
Net premiums earned										0	0	0
Net investment income										4	2	3
Equity in earnings of subsidiaries										1,038	791	942
Net realized gains (losses) including OTTI										(9)	53	(2)
Losses and loss expenses										0	0	0
Policy benefits										0	0	0
Policy acquisition costs and administrative expenses										28	26	19
Interest (income) expense										302	277	270
Other (income) expense										(4)	27	27
Amortization of Intangible Assets										0	0	0
Chubb integration expenses										29
Income tax expense										(349)	(94)	(108)
Net income (loss)										1,027	610	735
Comprehensive income										(192)	583	(230)
Other ACE Limited Subsidiaries and Eliminations
Information Provided In Connection With Outstanding Debt Of Subsidiaries [Line Items]
Net premiums written												17,025
Net premiums earned												16,613
Net investment income												2,139
Equity in earnings of subsidiaries												0
Net realized gains (losses) including OTTI												506
Losses and loss expenses												9,348
Policy benefits												515
Policy acquisition costs and administrative expenses												4,791
Interest (income) expense												37
Other (income) expense												114
Income tax expense												571
Net income (loss)												3,787
Comprehensive income												2,051
Consolidating Adjustments
Information Provided In Connection With Outstanding Debt Of Subsidiaries [Line Items]
Net premiums written												0
Net premiums earned												0
Net investment income												0
Equity in earnings of subsidiaries										(3,711)	(3,498)	(4,522)
Net realized gains (losses) including OTTI												0
Losses and loss expenses												0
Policy benefits												0
Policy acquisition costs and administrative expenses												0
Interest (income) expense												0
Other (income) expense												0
Amortization of Intangible Assets										0	0	0
Chubb integration expenses										0
Income tax expense												0
Net income (loss)										(3,711)	(3,498)	(4,522)
Comprehensive income										(565)	(3,509)	(1,821)
Other ACE Limited Subsidiaries and Eliminations
Information Provided In Connection With Outstanding Debt Of Subsidiaries [Line Items]
Net premiums written										17,713	17,799
Net premiums earned										17,213	17,426
Net investment income										2,187	2,248
Net realized gains (losses) including OTTI										(411)	(560)
Losses and loss expenses										9,484	9,649
Policy benefits										543	517
Policy acquisition costs and administrative expenses										5,120	5,216
Interest (income) expense										30	38
Other (income) expense										161	(16)
Amortization of Intangible Assets										171	108	$ 95
Chubb integration expenses										1
Income tax expense										795	714
Net income (loss)										2,684	2,888
Comprehensive income										$ 757	$ 2,926

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Information provided in connection with outstanding debt of subsidiaries (Condensed Consolidating Statement Of Cash Flows) (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Information Provided In Connection With Outstanding Debt Of Subsidiaries [Line Items]
Net cash flows from operating activities		$ 3,864		$ 4,496		$ 4,022
Purchases of fixed maturities available for sale		(16,071)		(15,553)		(21,398)
Purchases of fixed maturities held to maturity		(62)		(267)		(447)
Purchases of equity securities		(158)		(251)		(264)
Sales of fixed maturities available for sale		10,814		7,482		10,413
Sales of equity securities		183		670		142
Maturities and redemptions of fixed maturities available for sale		6,567		6,413		6,941
Maturities and redemptions of fixed maturities held to maturity		669		875		1,488
Net change in short-term investments		(8,216)		(603)		524
Net derivative instruments settlements		(21)		(230)		(471)
Acquisition of subsidiaries (net of cash acquired)		264		(766)		(977)
Capital contribution to subsidiary				0		0
Other		(263)		(274)		(393)
Net cash flows used for investing activities		(6,294)		(2,504)		(4,442)
Dividends paid on Common Shares		(862)		(862)		(517)
Common Shares repurchased		(758)		(1,429)		(287)
Proceeds from issuance of long-term debt		6,090		699		947
Proceeds from issuance of repurchase agreements		2,029		1,978		2,572
Repayments of Long-term Debt		(1,150)		(501)
Repayments of Short-term Debt		(2,027)		(1,977)		(2,572)
Proceeds from share-based compensation plans		131		127		135
Advances from (to) affiliates						0
Capital contribution from subsidiary				0		0
Net proceeds from (payments to) affiliated notional cash pooling programs	[1]					0
Dividends to parent company						0
Additions to Contract Holders Funds		503		366		233
Withdrawal from Contract Holders Funds		(221)		(172)		(120)
Other		(40)		(6)		0
Net cash flows (used for) from financing activities		3,695		(1,777)		391
Effect of foreign currency rate changes on cash and cash equivalents		(145)		(139)		(7)
Net increase (decrease) in cash		1,120		76		(36)
Cash – beginning of year		655	[2],[3],[4]	579	[1],[2]	615	[1]
Cash – end of year		1,775	[3],[5]	655	[2],[3],[4]	579	[1],[2]
ACE limited (Parent Gurantor)
Information Provided In Connection With Outstanding Debt Of Subsidiaries [Line Items]
Net cash flows from operating activities		3,125		541		970
Purchases of fixed maturities available for sale						0
Purchases of fixed maturities held to maturity						0
Purchases of equity securities						0
Sales of fixed maturities available for sale						0
Sales of equity securities						0
Maturities and redemptions of fixed maturities available for sale						0
Maturities and redemptions of fixed maturities held to maturity						0
Net change in short-term investments		0		0		(1)
Net derivative instruments settlements		0		0		0
Advances from (to) affiliates		(228)		260		(621)
Acquisition of subsidiaries (net of cash acquired)						0
Capital contribution to subsidiary		2,670				133
Other						0
Net cash flows used for investing activities		(2,670)		0		(134)
Dividends paid on Common Shares		(862)		(862)		(517)
Common Shares repurchased						0
Proceeds from issuance of long-term debt		0		0
Repayments of Short-term Debt						0
Proceeds from share-based compensation plans		0		0		14
Advances from (to) affiliates		(228)		260		(621)
Capital contribution from subsidiary				0		0
Net proceeds from (payments to) affiliated notional cash pooling programs		636	[3]	61		185	[1]
Dividends to parent company				0		0
Net cash flows (used for) from financing activities		(454)		(541)		(939)
Effect of foreign currency rate changes on cash and cash equivalents				0		0
Net increase (decrease) in cash		1		0		(103)
Cash – beginning of year		0		0	[1]	103	[1]
Cash – end of year		1	[3],[5]	0		0	[1]
ACE INA Holdings Inc. (Subsidiary Issuer)
Information Provided In Connection With Outstanding Debt Of Subsidiaries [Line Items]
Net cash flows from operating activities		682		210		(107)
Purchases of fixed maturities available for sale						0
Purchases of fixed maturities held to maturity						0
Purchases of equity securities						0
Sales of fixed maturities available for sale						0
Sales of equity securities						0
Maturities and redemptions of fixed maturities available for sale						0
Maturities and redemptions of fixed maturities held to maturity						0
Net change in short-term investments		(7,588)		216		4
Net derivative instruments settlements		(9)		53		1
Acquisition of subsidiaries (net of cash acquired)						0
Capital contribution to subsidiary		(625)		(258)		(1,097)
Other		(25)		(8)		(4)
Net cash flows used for investing activities		(8,247)		(429)		(1,098)
Dividends paid on Common Shares						0
Common Shares repurchased						0
Proceeds from issuance of long-term debt		6,090		699		947
Proceeds from issuance of repurchase agreements						0
Repayments of Long-term Debt		(1,150)		(500)
Proceeds from share-based compensation plans		0				0
Advances from (to) affiliates		95		(298)		621
Capital contribution from subsidiary		(2,791)		0		0
Net proceeds from (payments to) affiliated notional cash pooling programs		(220)	[3]	309		(349)	[1]
Dividends to parent company				0		0
Other		(40)		(6)	[2]
Net cash flows (used for) from financing activities		7,566		204		1,219
Effect of foreign currency rate changes on cash and cash equivalents				0		0
Net increase (decrease) in cash		1		(15)		14
Cash – beginning of year		1	[2],[3],[4]	16	[1]	2	[1]
Cash – end of year		2	[3],[5]	1	[2],[3],[4]	16	[1]
Other ACE Limited Subsidiaries and Eliminations
Information Provided In Connection With Outstanding Debt Of Subsidiaries [Line Items]
Net cash flows from operating activities		3,836		4,419		3,984
Purchases of fixed maturities available for sale		(16,053)		(15,816)		(21,504)
Purchases of fixed maturities held to maturity		(62)		(267)		(447)
Purchases of equity securities		(158)		(251)		(264)
Sales of fixed maturities available for sale		10,814		7,750		10,519
Sales of equity securities		183		670		142
Maturities and redemptions of fixed maturities available for sale		6,567		6,413		6,941
Maturities and redemptions of fixed maturities held to maturity		669		875		1,488
Net change in short-term investments		(628)		392		521
Net derivative instruments settlements		(12)		(283)		(470)
Acquisition of subsidiaries (net of cash acquired)		264		(766)		(977)
Capital contribution to subsidiary		(2,791)				0
Other		(256)		(266)		(389)
Net cash flows used for investing activities		(1,463)		(2,333)		(4,440)
Dividends paid on Common Shares						0
Common Shares repurchased		(758)		(1,429)		(287)
Proceeds from issuance of long-term debt		0		0
Proceeds from issuance of repurchase agreements		2,029		1,978		2,572
Repayments of Long-term Debt		0		(1)
Repayments of Short-term Debt		2,027		1,977		2,572
Proceeds from share-based compensation plans		131		127		121
Advances from (to) affiliates		133		38		0
Capital contribution from subsidiary		3,295		258		(825)
Net proceeds from (payments to) affiliated notional cash pooling programs	[1]					0
Dividends to parent company		(3,779)		(674)		1,230
Additions to Contract Holders Funds		503		366		233
Withdrawal from Contract Holders Funds		(221)		(172)		(120)
Other	[2]			0
Net cash flows (used for) from financing activities		(694)		(1,486)		352
Effect of foreign currency rate changes on cash and cash equivalents		(145)		(139)		(7)
Net increase (decrease) in cash		1,534		461	[2]	(111)
Cash – beginning of year		1,209	[2],[3],[4]	748	[1]	859	[1]
Cash – end of year		2,743	[3],[5]	1,209	[2],[3],[4]	748	[1]
Consolidating Adjustments
Information Provided In Connection With Outstanding Debt Of Subsidiaries [Line Items]
Net cash flows from operating activities		(3,779)		(674)		(825)
Purchases of fixed maturities available for sale		(18)		263		106
Purchases of fixed maturities held to maturity						0
Purchases of equity securities						0
Sales of fixed maturities available for sale				(268)		(106)
Sales of equity securities						0
Maturities and redemptions of fixed maturities available for sale						0
Maturities and redemptions of fixed maturities held to maturity						0
Net change in short-term investments		0		(5)		0
Net derivative instruments settlements						0
Acquisition of subsidiaries (net of cash acquired)						0
Capital contribution to subsidiary		6,086		258		1,230
Other		(18)				0
Net cash flows used for investing activities		6,086		258		1,230
Dividends paid on Common Shares						0
Common Shares repurchased						0
Proceeds from issuance of long-term debt		0		0
Proceeds from issuance of repurchase agreements						0
Proceeds from share-based compensation plans				0		0
Advances from (to) affiliates		0				0
Capital contribution from subsidiary		(6,086)		(258)		825
Net proceeds from (payments to) affiliated notional cash pooling programs		(416)	[3]	(370)		164	[1]
Dividends to parent company		3,779		674		(1,230)
Net cash flows (used for) from financing activities		(2,723)		46		(241)
Effect of foreign currency rate changes on cash and cash equivalents				0		0
Net increase (decrease) in cash		(416)		(370)		164
Cash – beginning of year		(555)	[2],[3],[4]	(185)	[1]	(349)	[1]
Cash – end of year		$ (971)	[3],[5]	$ (555)	[2],[3],[4]	$ (185)	[1]

[1] Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2013 and 2012, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[2] Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2014 and 2013, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[3] Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2015 and 2014, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[4] Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2014, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[5] Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2015, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

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Condensed Unaudited Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended									12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014		Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Net premiums earned	$ 4,207	$ 4,719	$ 4,360	$ 3,927		$ 4,370	$ 4,754	$ 4,332	$ 3,970	$ 17,213	$ 17,426	$ 16,613
Net investment income	532	549	562	551		577	566	556	553	2,194	2,252	2,144
Net realized gains (losses) including OTTI	(60)	(397)	126	(89)		(210)	(120)	(73)	(104)	(420)	(507)	504
Total revenues	4,679	4,871	5,048	4,389		4,737	5,200	4,815	4,419	18,987	19,171	19,261
Losses and loss expenses	2,302	2,643	2,417	2,122		2,416	2,684	2,388	2,161	9,484	9,649	9,348
Policy benefits	159	89	153	142		134	125	144	114	543	517	515
Net income	$ 683	$ 528	$ 942	$ 681	[1]	$ 555	$ 785	$ 779	$ 734	$ 2,834	$ 2,853	$ 3,758
Basic earnings per share	$ 2.10	$ 1.63	$ 2.89	$ 2.08		$ 1.68	$ 2.35	$ 2.30	$ 2.16	$ 8.71	$ 8.50	$ 11.02
Diluted earnings per share	$ 2.08	$ 1.62	$ 2.86	$ 2.05		$ 1.66	$ 2.32	$ 2.28	$ 2.14	$ 8.62	$ 8.42	$ 10.92
Income Tax Reconciliation, Change To Deferred Taxes Related to Unrealized Foreign Exchange Net	$ 89

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Schedule I (Details) $ in Millions	Dec. 31, 2015 USD ($)
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	$ 65,459
Fair Value	66,373
Amount at Which Shown in the Balance Sheet	66,251
Fixed maturities available for sale
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	43,149
Fair Value	43,587
Amount at Which Shown in the Balance Sheet	43,587
Fixed maturities available for sale | U.S. Treasury and agency
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	2,481
Fair Value	2,528
Amount at Which Shown in the Balance Sheet	2,528
Fixed maturities available for sale | Foreign
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	13,190
Fair Value	13,445
Amount at Which Shown in the Balance Sheet	13,445
Fixed maturities available for sale | Corporate securities
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	15,028
Fair Value	14,929
Amount at Which Shown in the Balance Sheet	14,929
Fixed maturities available for sale | Mortgage backed-securities
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	9,827
Fair Value	9,958
Amount at Which Shown in the Balance Sheet	9,958
Fixed maturities available for sale | States, municipalities, and political subdivisions
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	2,623
Fair Value	2,727
Amount at Which Shown in the Balance Sheet	2,727
Fixed maturities held to maturity
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	8,430
Fair Value	8,552
Amount at Which Shown in the Balance Sheet	8,430
Fixed maturities held to maturity | U.S. Treasury and agency
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	733
Fair Value	745
Amount at Which Shown in the Balance Sheet	733
Fixed maturities held to maturity | Foreign
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	763
Fair Value	785
Amount at Which Shown in the Balance Sheet	763
Fixed maturities held to maturity | Corporate securities
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	3,054
Fair Value	3,056
Amount at Which Shown in the Balance Sheet	3,054
Fixed maturities held to maturity | Mortgage backed-securities
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	1,707
Fair Value	1,743
Amount at Which Shown in the Balance Sheet	1,707
Fixed maturities held to maturity | States, municipalities, and political subdivisions
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	2,173
Fair Value	2,223
Amount at Which Shown in the Balance Sheet	2,173
Industrial, miscellaneous, and all others
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	441
Fair Value	497
Amount at Which Shown in the Balance Sheet	497
Short-term investments
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	10,446
Fair Value	10,446
Amount at Which Shown in the Balance Sheet	10,446
Other investments
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	2,993
Fair Value	3,291
Amount at Which Shown in the Balance Sheet	$ 3,291

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Schedule II (BALANCE SHEETS - Parent Company Only) (Details) - USD ($) $ in Millions		Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013	[5]	Dec. 31, 2012	[5]
Assets
Short-term investments		$ 10,446		$ 2,322
Other investments		3,291		3,346
Cash		1,775	[1],[2]	655	[1],[3],[4]	$ 579	[3]	$ 615
Other assets		3,881		3,556
Total assets		102,366		98,248
Liabilities
Accounts payable, accrued expenses, and other liabilities		6,205		5,726
Bank Overdrafts	[4]			0
Short-term debt				1,150
Total liabilities		73,231		68,661
Stockholders' Equity Attributable to Parent [Abstract]
Common Shares		7,833		8,055
Common Shares in treasury		(1,922)		(1,448)
Additional paid-in capital		4,481		5,145
Retained earnings		19,478		16,644
Accumulated other comprehensive income		(735)		1,191
Total liabilities and shareholders’ equity		102,366		98,248
Parent Company Only
Assets
Investments in subsidiaries and affiliates on equity basis		29,612		29,497
Short-term investments		1		1
Other investments		27		29
Total investments		29,640		29,527
Cash		1	[1],[2]	0		$ 0		$ 103
Due from subsidiaries and affiliates, net		644		583
Other assets		8		4
Total assets		30,293		30,114
Liabilities
Accounts payable, accrued expenses, and other liabilities		276		281
Bank Overdrafts		882	[2]	246	[4]
Total liabilities		1,158		527
Stockholders' Equity Attributable to Parent [Abstract]
Common Shares		7,833		8,055
Common Shares in treasury		(1,922)		(1,448)
Additional paid-in capital		4,481		5,145
Retained earnings		19,478		16,644
Accumulated other comprehensive income		(735)		1,191
Total shareholders' equity		29,135		29,587
Total liabilities and shareholders’ equity		$ 30,293		$ 30,114

[1] Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2015 and 2014, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[2] Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2015, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[3] Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2014 and 2013, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[4] Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2014, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[5] Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2013 and 2012, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

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Schedule II Schedule II (STATEMENTS OF OPERATIONS - Parent Company Only) (Details) - USD ($) $ in Millions	3 Months Ended									12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014		Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Equity in net income of subsidiaries and affiliates										$ 113	$ 231	$ 119
Net realized gains (losses)	$ (60)	$ (397)	$ 126	$ (89)		$ (210)	$ (120)	$ (73)	$ (104)	(420)	(507)	504
Total revenues	4,679	4,871	5,048	4,389		4,737	5,200	4,815	4,419	18,987	19,171	19,261
Administrative and other (income) expense										(2,270)	(2,245)	(2,211)
Income tax expense (benefit)										462	634	480
Total expenses										(15,691)	(15,684)	(15,023)
Net income	$ 683	$ 528	$ 942	$ 681	[1]	$ 555	$ 785	$ 779	$ 734	2,834	2,853	3,758
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest										908	2,892	2,023
Parent Company Only
Condensed Financial Statements, Captions [Line Items]
Investment income, including intercompany interest income										35	37	34
Equity in net income of subsidiaries and affiliates										2,673	2,707	3,580
Net realized gains (losses)										0	0	0
Total revenues										2,708	2,744	3,614
Administrative and other (income) expense										(142)	(123)	(161)
Income tax expense (benefit)										16	14	17
Total expenses										(126)	(109)	(144)
Net income										2,834	2,853	3,758
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest										$ 908	$ 2,892	$ 2,023

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Schedule II (STATEMENTS OF CASH FLOWS - Parent Company Only) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Net cash flows from operating activities		$ 3,864		$ 4,496		$ 4,022
Purchases of fixed maturities available for sale		(16,040)		(15,553)		(21,340)
Sales of fixed maturities available for sale		10,783		7,482		10,355
Net change in short-term investments		(8,216)		(603)		524
Net derivative instruments settlements		(21)		(230)		(471)
Other		263		274		393
Net cash flows used for investing activities		(6,294)		(2,504)		(4,442)
Dividends paid on Common Shares		(862)		(862)		(517)
Proceeds from issuance of repurchase agreements		2,029		1,978		2,572
Repayments of Short-term Debt		2,027		1,977		2,572
Net proceeds from (payments to) affiliated notional cash pooling programs	[1]					0
Proceeds from share-based compensation plans		131		127		135
Net cash flows (used for) from financing activities		3,695		(1,777)		391
Net increase (decrease) in cash		1,120		76		(36)
Cash – beginning of year		655	[2],[3],[4]	579	[1],[2]	615	[1]
Cash – end of year		1,775	[3],[5]	655	[2],[3],[4]	579	[1],[2]
Parent Company Only
Condensed Financial Statements, Captions [Line Items]
Net cash flows from operating activities		3,125		541		970
Net change in short-term investments		0		0		(1)
Net derivative instruments settlements		0		0		0
Capital contributions to subsidiaries		(2,670)		0		(133)
Other						0
Net cash flows used for investing activities		(2,670)		0		(134)
Dividends paid on Common Shares		(862)		(862)		(517)
Repayments of Short-term Debt						0
Advances (to) from affiliates		(228)		260		(621)
Net proceeds from (payments to) affiliated notional cash pooling programs		636	[3]	61		185	[1]
Proceeds from share-based compensation plans		0		0		14
Net cash flows (used for) from financing activities		(454)		(541)		(939)
Net increase (decrease) in cash		1		0		(103)
Cash – beginning of year		0		0	[1]	103	[1]
Cash – end of year		$ 1	[3],[5]	$ 0		$ 0	[1]

[1] Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2013 and 2012, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[2] Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2014 and 2013, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[3] Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2015 and 2014, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[4] Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2014, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[5] Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2015, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

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Schedule IV (SUPPLEMENTAL INFORMATION CONCERNING REINSURANCE) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Percentage of Amount Assumed to Net									21.00%	19.00%	21.00%
Net Amount	$ 4,207	$ 4,719	$ 4,360	$ 3,927	$ 4,370	$ 4,754	$ 4,332	$ 3,970	$ 17,213	$ 17,426	$ 16,613
Assumed From Other Companies									3,676	3,336	3,479
Ceded To Other Companies									5,818	5,465	5,722
Direct Amount									$ 19,355	$ 19,555	$ 18,856
Property and Casualty [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Percentage of Amount Assumed to Net									25.00%	23.00%	25.00%
Net Amount									$ 12,781	$ 12,767	$ 12,141
Assumed From Other Companies									3,259	2,923	3,015
Ceded To Other Companies									5,373	4,940	5,160
Direct Amount									$ 14,895	$ 14,784	$ 14,286
Accident and Health [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Percentage of Amount Assumed to Net									5.00%	4.00%	5.00%
Net Amount									$ 3,501	$ 3,678	$ 3,567
Assumed From Other Companies									168	141	168
Ceded To Other Companies									351	434	486
Direct Amount									$ 3,684	$ 3,971	$ 3,885
Life [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Percentage of Amount Assumed to Net									27.00%	28.00%	33.00%
Net Amount									$ 931	$ 981	$ 905
Assumed From Other Companies									249	272	296
Ceded To Other Companies									94	91	76
Direct Amount									$ 776	$ 800	$ 685

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Schedule VI (SUPPLEMENTARY INFORMATION CONCERNING PROPERTY AND CASUALTY OPERATIONS) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Supplemental Information for Property, Casualty Insurance Underwriters [Abstract]
Deferred Policy Acquisition Costs	$ 2,219	$ 2,057	$ 1,865
Net Reserves for Unpaid Losses	26,562	27,008	26,831
Unearned Premiums	8,439	8,222	7,539
Net Premiums Earned	16,282	16,445	15,708
Net Investment Income	2,007	2,071	1,977
Net Losses and Loss Expenses Incurred Related to Current Year	10,030	10,176	9,878
Net Losses and Loss Expenses Incurred Related to Prior Year	(546)	(527)	(530)
Amortization of Deferred Policy Acquisition Costs	2,692	2,805	2,447
Net Paid Losses and Loss Expenses	9,665	9,235	8,977
Net Premiums Written	$ 16,734	$ 16,787	$ 16,069