10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

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

For the quarterly period ended September 30, 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 number 1-8661

THE CHUBB CORPORATION

(Exact name of registrant as specified in its charter)

NEW JERSEY	13-2595722
(State or other jurisdiction of	(I. R. S. Employer
incorporation or organization)	Identification No.)
15 MOUNTAIN VIEW ROAD, WARREN, NEW JERSEY	07059
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code (908) 903-2000

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  x     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  x     NO  ¨

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 the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

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

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

YES  ¨     NO  x

The number of shares of common stock outstanding as of September 30, 2015 was 227,055,872.

THE CHUBB CORPORATION

INDEX

	Page Number
Part I. Financial Information:
Item 1 — Financial Statements:
Consolidated Statements of Income for the Three Months and Nine Months Ended September 30, 2015 and 2014		1
Consolidated Statements of Comprehensive Income for the Three Months and Nine Months Ended September  30, 2015 and 2014		2
Consolidated Balance Sheets as of September 30, 2015 and December 31, 2014		3
Consolidated Statements of Shareholders’ Equity for the Nine Months Ended September 30, 2015 and 2014		4
Consolidated Statements of Cash Flows for the Nine Months Ended September 30, 2015 and 2014		5
Notes to Consolidated Financial Statements		6
Item 2 — Management’s Discussion and Analysis of Financial Condition and Results of Operations		21
Item 3 — Quantitative and Qualitative Disclosures About Market Risk		58
Item 4 — Controls and Procedures		58
Part II. Other Information:
Item 1 — Legal Proceedings		59
Item 1A — Risk Factors		60
Item 2 — Unregistered Sales of Equity Securities and Use of Proceeds		64
Item 6 — Exhibits		65
Signatures		65
EX-31.1
EX-31.2
EX-32.1
EX-32.2
EX-101 INSTANCE DOCUMENT
EX-101 SCHEMA DOCUMENT
EX-101 CALCULATION LINKBASE DOCUMENT
EX-101 LABELS LINKBASE DOCUMENT
EX-101 PRESENTATION LINKBASE DOCUMENT
EX-101 DEFINITION LINKBASE DOCUMENT

Page 1

Part I. FINANCIAL INFORMATION

Item 1 — Financial Statements

THE CHUBB CORPORATION

CONSOLIDATED STATEMENTS OF INCOME

PERIODS ENDED SEPTEMBER 30

(in millions)

	Third Quarter					Nine Months
	2015			2014		2015			2014
Revenues
Premiums Earned	$	3,166		$	3,119	$	9,404		$	9,212
Investment Income		328			344		1,001			1,053
Other Revenues		2			1		6			6
Realized Investment Gains (Losses), Net
Total Other-Than-Temporary Impairment Losses on Investments		(26	)		—		(49	)		(5	)
Other Realized Investment Gains, Net		108			110		162			356
Total Realized Investment Gains, Net		82			110		113			351
Total Revenues		3,578			3,574		10,524			10,622
Losses and Expenses
Losses and Loss Expenses		1,633			1,679		5,260			5,316
Amortization of Deferred Policy Acquisition Costs		663			644		1,941			1,896
Other Insurance Operating Costs and Expenses		349			357		1,049			1,079
Investment Expenses		13			12		36			32
Other Expenses		4			4		10			14
Corporate Expenses		69			60		221			186
Total Losses and Expenses		2,731			2,756		8,517			8,523
Income Before Federal and Foreign Income Tax		847			818		2,007			2,099
Federal and Foreign Income Tax		246			224		537			557
Net Income	$	601		$	594	$	1,470		$	1,542
Net Income Per Share
Basic	$	2.62		$	2.47	$	6.36		$	6.30
Diluted		2.60			2.47		6.33			6.28
Dividends Declared Per Share		.57			.50		1.71			1.50

See Notes to Consolidated Financial Statements.

Page 2

THE CHUBB CORPORATION

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

PERIODS ENDED SEPTEMBER 30

(in millions)

	Third Quarter						Nine Months
	2015			2014			2015			2014
Net Income	$	601		$	594		$	1,470		$	1,542
Other Comprehensive Income (Loss), Net of Tax
Change in Unrealized Appreciation of Investments		(19	)		(46	)		(285	)		427
Change in Postretirement Benefit Costs Not Yet Recognized in Net Income		11			6			35			17
Foreign Currency Translation Losses		(38	)		(26	)		(199	)		(41	)
		(46	)		(66	)		(449	)		403
Comprehensive Income	$	555		$	528		$	1,021		$	1,945

See Notes to Consolidated Financial Statements.

Page 3

THE CHUBB CORPORATION

CONSOLIDATED BALANCE SHEETS

(in millions)

	September 30			December 31
	2015			2014
Assets
Invested Assets
Short Term Investments	$	3,052		$	1,318
Fixed Maturities (cost $35,469 and $36,958)		37,016			38,780
Equity Securities (cost $1,060 and $1,089)		1,771			1,964
Other Invested Assets		1,422			1,423
TOTAL INVESTED ASSETS		43,261			43,485
Cash		53			47
Accrued Investment Income		403			410
Premiums Receivable		2,480			2,560
Reinsurance Recoverable on Unpaid Losses and Loss Expenses		1,505			1,639
Prepaid Reinsurance Premiums		257			256
Deferred Policy Acquisition Costs		1,302			1,284
Deferred Income Tax		120			—
Goodwill		467			467
Other Assets		1,344			1,138
TOTAL ASSETS	$	51,192		$	51,286
Liabilities
Unpaid Losses and Loss Expenses	$	22,359		$	22,678
Unearned Premiums		6,636			6,581
Long Term Debt		3,300			3,300
Dividend Payable to Shareholders		130			117
Deferred Income Tax		—			15
Accrued Expenses and Other Liabilities		2,396			2,299
TOTAL LIABILITIES		34,821			34,990
Shareholders’ Equity
Common Stock - $1 Par Value; 371,980,460 Shares		372			372
Paid-In Surplus		179			171
Retained Earnings		24,596			23,520
Accumulated Other Comprehensive Income		661			1,110
Treasury Stock, at Cost - 144,924,588 and 139,551,071 Shares		(9,437	)		(8,877	)
TOTAL SHAREHOLDERS’ EQUITY		16,371			16,296
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$	51,192		$	51,286

See Notes to Consolidated Financial Statements.

Page 4

THE CHUBB CORPORATION

CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY

NINE MONTHS ENDED SEPTEMBER 30

(in millions)

	2015			2014
Common Stock
Balance, Beginning of Year and End of Period	$	372		$	372
Paid-In-Surplus
Balance, Beginning of Year		171			171
Changes Related to Stock-Based Employee Compensation (includes tax benefit of $4 and $16)		8			(20	)
Balance, End of Period		179			151
Retained Earnings
Balance, Beginning of Year		23,520			21,902
Net Income		1,470			1,542
Dividends Declared (per share $1.71 and $1.50)		(394	)		(365	)
Balance, End of Period		24,596			23,079
Accumulated Other Comprehensive Income
Unrealized Appreciation of Investments Including Unrealized Other-Than-Temporary Impairment Losses
Balance, Beginning of Year		1,753			1,225
Change During Period, Net of Tax		(285	)		427
Balance, End of Period		1,468			1,652
Postretirement Benefit Costs Not Yet Recognized in Net Income
Balance, Beginning of Year		(589	)		(253	)
Change During Period, Net of Tax		35			17
Balance, End of Period		(554	)		(236	)
Foreign Currency Translation Gains (Losses)
Balance, Beginning of Year		(54	)		63
Change During Period, Net of Tax		(199	)		(41	)
Balance, End of Period		(253	)		22
Accumulated Other Comprehensive Income, End of Period		661			1,438
Treasury Stock, at Cost
Balance, Beginning of Year		(8,877	)		(7,383	)
Repurchase of Shares		(604	)		(1,209	)
Shares Issued Under Stock-Based Employee Compensation Plans		44			58
Balance, End of Period		(9,437	)		(8,534	)
TOTAL SHAREHOLDERS’ EQUITY	$	16,371		$	16,506

See Notes to Consolidated Financial Statements.

Page 5

THE CHUBB CORPORATION

CONSOLIDATED STATEMENTS OF CASH FLOWS

NINE MONTHS ENDED SEPTEMBER 30

(in millions)

	2015			2014
Cash Flows from Operating Activities
Net Income	$	1,470		$	1,542
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities
Increase in Unpaid Losses and Loss Expenses, Net		176			151
Increase in Unearned Premiums, Net		182			242
Change in Income Tax Payable or Recoverable		(45	)		163
Deferred Income Tax		107			66
Amortization of Premiums and Discounts on Fixed Maturities		173			143
Depreciation		39			41
Realized Investment Gains, Net		(113	)		(351	)
Other, Net		(32	)		(78	)
Net Cash Provided by Operating Activities		1,957			1,919
Cash Flows from Investing Activities
Proceeds from Fixed Maturities
Sales		3,197			3,243
Maturities, Calls and Redemptions		3,207			3,162
Proceeds from Sales of Equity Securities		94			199
Purchases of Fixed Maturities		(5,683	)		(7,517)
Purchases of Equity Securities		(48	)		(109	)
Investments in Other Invested Assets, Net		74			189
Decrease (Increase) in Short Term Investments, Net		(1,757	)		56
Change in Receivable or Payable from Security Transactions Not Settled, Net		14			457
Purchases of Property and Equipment, Net		(54	)		(44	)
Net Cash Used in Investing Activities		(956	)		(364	)
Cash Flows from Financing Activities
Decrease in Funds Held Under Deposit Contracts		(3	)		(2	)
Proceeds from Issuance of Common Stock Under Stock-Based Employee Compensation Plans		13			18
Repurchase of Shares		(624	)		(1,210	)
Dividends Paid to Shareholders		(381	)		(356	)
Net Cash Used in Financing Activities		(995	)		(1,550	)
Net Increase in Cash		6			5
Cash at Beginning of Year		47			52
Cash at End of Period	$	53		$	57

See Notes to Consolidated Financial Statements.

Page 6

THE CHUBB CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1) General

The accompanying condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (GAAP) and include the accounts of The Chubb Corporation (Chubb) and its subsidiaries (collectively, the Corporation). Significant intercompany transactions have been eliminated in consolidation.

The amounts included in this report are unaudited but include those adjustments, consisting of normal recurring items, that management considers necessary for a fair presentation. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes in the Notes to Consolidated Financial Statements included in Chubb’s Annual Report on Form 10-K for the year ended December 31, 2014.

2) Merger Agreement with ACE Limited

On June 30, 2015, Chubb entered into an Agreement and Plan of Merger (Merger Agreement) with ACE Limited (ACE), a company organized under the laws of Switzerland, and William Investment Holdings Corporation (Merger Sub), a New Jersey corporation and a wholly owned indirect subsidiary of ACE, pursuant to which Merger Sub will merge with and into Chubb, with Chubb surviving as a wholly owned indirect subsidiary of ACE (the Merger). ACE has indicated that shortly after the completion of the Merger, it expects to merge Chubb with and into ACE INA Holdings Inc., a Delaware corporation and indirect subsidiary of ACE, with ACE INA Holdings Inc. continuing as the surviving corporation.

At the effective time of the Merger, each share (except for certain shares held by ACE, Chubb or their subsidiaries) of common stock of Chubb, par value $1.00 per share, will be converted into the right to receive 0.6019 of a common share of ACE, par value CHF 24.15 per share, and $62.93 in cash.

The Board of Directors of Chubb (the Board) unanimously approved the Merger Agreement and the transactions contemplated thereby, including the Merger. The closing of the Merger is subject to various customary conditions, including receipt of required insurance regulatory and other governmental approvals. Some other closing conditions have already been satisfied, including Chubb shareholder approval of the Merger Agreement, approval by ACE shareholders of certain Merger-related matters and the termination of the applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended. The transaction is expected to close during the first quarter of 2016.

The Merger Agreement contains certain termination rights for both Chubb and ACE and further provides that, upon termination under specified circumstances, Chubb would be required to pay to ACE a termination fee of $930 million. No such termination fee has been accrued as of September 30, 2015.

Page 7

Pursuant to the Merger Agreement, until the effective time of the Merger or termination of the Merger Agreement, the Corporation is required to conduct its business in the ordinary course in all material respects and, without the prior written consent of ACE, cannot take certain actions, except in each case as permitted pursuant to the Merger Agreement.

3) Accounting Pronouncements Not Yet Adopted

In February 2015, the Financial Accounting Standards Board issued updated guidance that amends certain aspects of the current consolidation accounting guidance. In particular, the new guidance modifies the evaluation of whether limited partnerships and similar legal entities are variable interest entities (VIEs) or voting interest entities and eliminates the presumption that a general partner should consolidate a limited partnership. The new guidance would be effective for the Corporation for the year beginning January 1, 2016. The Corporation is in the process of assessing the effect, if any, that the implementation of this guidance will have on its financial position and results of operations.

Page 8

4) Invested Assets

(a) The amortized cost and fair value of fixed maturities and equity securities were as follows:

	September 30, 2015
	Amortized Cost		Gross Unrealized Appreciation		Gross Unrealized Depreciation		Fair Value
	(in millions)
Fixed maturities
Tax exempt	$	18,890	$	1,012	$	29	$	19,873
Taxable
U.S. government and government agency and authority obligations		1,259		54		1		1,312
Corporate bonds		8,409		260		45		8,624
Foreign government and government agency obligations		5,858		269		5		6,122
Residential mortgage-backed securities		110		15		1		124
Commercial mortgage-backed securities		943		19		1		961
		16,579		617		53		17,143
Total fixed maturities	$	35,469	$	1,629	$	82	$	37,016
Equity securities	$	1,060	$	742	$	31	$	1,771

	December 31, 2014
	Amortized Cost		Gross Unrealized Appreciation		Gross Unrealized Depreciation		Fair Value
	(in millions)
Fixed maturities
Tax exempt	$	18,614	$	1,174	$	16	$	19,772
Taxable
U.S. government and government agency and authority obligations		1,962		46		1		2,007
Corporate bonds		8,741		327		40		9,028
Foreign government and government agency obligations		6,380		295		3		6,672
Residential mortgage-backed securities		192		20		1		211
Commercial mortgage-backed securities		1,069		22		1		1,090
		18,344		710		46		19,008
Total fixed maturities	$	36,958	$	1,884	$	62	$	38,780
Equity securities	$	1,089	$	894	$	19	$	1,964

Page 9

The fair value and amortized cost of fixed maturities at September 30, 2015 by contractual maturity were as follows:

	Fair Value		Amortized Cost
	(in millions)
Due in one year or less	$	2,193	$	2,174
Due after one year through five years		11,621		11,173
Due after five years through ten years		13,722		13,032
Due after ten years		8,395		8,037
		35,931		34,416
Residential mortgage-backed securities		124		110
Commercial mortgage-backed securities		961		943
	$	37,016	$	35,469

Actual maturities could differ from contractual maturities because borrowers may have the right to call or prepay obligations.

The Corporation’s equity securities comprise a diversified portfolio of primarily U.S. publicly-traded common stocks.

The Corporation is involved in the normal course of business with VIEs primarily as a passive investor in residential mortgage-backed securities, commercial mortgage-backed securities and private equity limited partnerships issued by third party VIEs. The Corporation is not the primary beneficiary of these VIEs. The Corporation’s maximum exposure to loss with respect to these investments is limited to the investment carrying values included in the Corporation’s consolidated balance sheet and any unfunded partnership commitments.

(b) The components of unrealized appreciation or depreciation, including unrealized other-than-temporary impairment losses, of investments carried at fair value were as follows:

	September 30 2015		December 31 2014
	(in millions)
Fixed maturities
Gross unrealized appreciation	$	1,629	$	1,884
Gross unrealized depreciation		82		62
		1,547		1,822
Equity securities
Gross unrealized appreciation		742		894
Gross unrealized depreciation		31		19
		711		875
		2,258		2,697
Deferred income tax liability		790		944
	$	1,468	$	1,753

Page 10

The following table summarizes, for all investment securities in an unrealized loss position at September 30, 2015, the aggregate fair value and gross unrealized depreciation, including unrealized other-than-temporary impairment losses, by investment category and length of time that individual securities have continuously been in an unrealized loss position.

	Less Than 12 Months				12 Months or More				Total
	Fair Value		Gross Unrealized Depreciation		Fair Value		Gross Unrealized Depreciation		Fair Value		Gross Unrealized Depreciation
	(in millions)
Fixed maturities
Tax exempt	$	1,287	$	16	$	249	$	13	$	1,536	$	29
Taxable
U.S. government and government agency and authority obligations		52		1		10		—		62		1
Corporate bonds		1,695		30		441		15		2,136		45
Foreign government and government agency obligations		430		3		125		2		555		5
Residential mortgage-backed securities		—		—		5		1		5		1
Commercial mortgage-backed securities		47		1		32		—		79		1
		2,224		35		613		18		2,837		53
Total fixed maturities		3,511		51		862		31		4,373		82
Equity securities		138		27		8		4		146		31
	$	3,649	$	78	$	870	$	35	$	4,519	$	113

At September 30, 2015, approximately 1,125 individual fixed maturities and 25 individual equity securities were in an unrealized loss position. The Corporation does not have the intent to sell and it is not more likely than not that the Corporation will be required to sell these fixed maturities before the securities recover to their amortized cost value. In addition, the Corporation believes that none of the declines in the fair values of these fixed maturities relate to credit losses. The Corporation has the intent and ability to hold the equity securities in an unrealized loss position for a period of time sufficient to allow for the recovery of cost. The Corporation believes that none of the declines in the fair value of these fixed maturities and equity securities were other than temporary at September 30, 2015.

Page 11

The following table summarizes, for all investment securities in an unrealized loss position at December 31, 2014, the aggregate fair value and gross unrealized depreciation, including unrealized other-than-temporary impairment losses, by investment category and length of time that individual securities have continuously been in an unrealized loss position.

	Less Than 12 Months				12 Months or More				Total
	Fair Value		Gross Unrealized Depreciation		Fair Value		Gross Unrealized Depreciation		Fair Value		Gross Unrealized Depreciation
	(in millions)
Fixed maturities
Tax exempt	$	422	$	3	$	305	$	13	$	727	$	16
Taxable
U.S. government and government agency and authority obligations		936		1		36		—		972		1
Corporate bonds		1,327		23		888		17		2,215		40
Foreign government and government agency obligations		318		1		207		2		525		3
Residential mortgage-backed securities		—		—		7		1		7		1
Commercial mortgage-backed securities		106		—		67		1		173		1
		2,687		25		1,205		21		3,892		46
Total fixed maturities		3,109		28		1,510		34		4,619		62
Equity securities		67		11		11		8		78		19
	$	3,176	$	39	$	1,521	$	42	$	4,697	$	81

The change in unrealized appreciation or depreciation of investments carried at fair value, including the change in unrealized other-than-temporary impairment losses, was as follows:

	Periods Ended September 30
	Third Quarter						Nine Months
	2015			2014			2015			2014
	(in millions)
Change in unrealized appreciation of fixed maturities	$	134		$	2		$	(275	)	$	619
Change in unrealized appreciation of equity securities		(163	)		(73	)		(164	)		37
		(29	)		(71	)		(439	)		656
Deferred income tax (credit)		(10	)		(25	)		(154	)		229
	$	(19	)	$	(46	)	$	(285	)	$	427

Page 12

(c) Realized investment gains and losses were as follows:

	Periods Ended September 30
	Third Quarter						Nine Months
	2015			2014			2015			2014
				(in millions)
Fixed maturities
Gross realized gains	$	20		$	27		$	50		$	104
Gross realized losses		(5	)		(5	)		(23	)		(33	)
Other-than-temporary impairment losses		(11	)		—			(12	)		(4	)
		4			22			15			67
Equity securities
Gross realized gains		42			43			58			132
Other-than-temporary impairment losses		(15	)		—			(37	)		(1	)
		27			43			21			131
Other invested assets		51			45			77			153
	$	82		$	110		$	113		$	351

(d) As of September 30, 2015 and December 31, 2014, fixed maturities still held by the Corporation for which a portion of their other-than-temporary impairment losses were recognized in other comprehensive income had cumulative credit-related losses of $16 million and $18 million, respectively, recognized in net income.

5) Comprehensive Income

Comprehensive income is defined as all changes in shareholders’ equity, except those arising from transactions with shareholders. Comprehensive income includes net income and other comprehensive income or loss, which for the Corporation consists of changes in unrealized appreciation or depreciation of investments carried at fair value, changes in unrealized other-than-temporary impairment losses of fixed maturities, changes in postretirement benefit costs not yet recognized in net income and changes in foreign currency translation gains or losses.

Page 13

The components of other comprehensive income or loss were as follows:

	Periods Ended September 30, 2015
	Third Quarter									Nine Months
	Before Tax			Income Tax			Net of Tax			Before Tax			Income Tax			Net of Tax
	(in millions)
Net unrealized holding gains (losses) arising during the period	$	2		$	1		$	1		$	(403	)	$	(141	)	$	(262	)
Reclassification adjustment for net realized gains included in net income		31			11			20			36			13			23
Net unrealized losses recognized in other comprehensive loss		(29	)		(10	)		(19	)		(439	)		(154	)		(285	)
Postretirement benefit gain not yet recognized in net income arising during the period		2			—			2			7			2			5
Reclassification adjustment for the amortization of net actuarial loss and prior service cost included in net income (a)		(15	)		(6	)		(9	)		(47	)		(17	)		(30	)
Net change in postretirement benefit costs not yet recognized in net income		17			6			11			54			19			35
Foreign currency translation losses		(58	)		(20	)		(38	)		(305	)		(106	)		(199	)
Total other comprehensive loss	$	(70	)	$	(24	)	$	(46	)	$	(690	)	$	(241	)	$	(449	)
	Periods Ended September 30, 2014
	Third Quarter									Nine Months
	Before Tax			Income Tax			Net of Tax			Before Tax			Income Tax			Net of Tax
	(in millions)
Net unrealized holding gains (losses) arising during the period	$	(6	)	$	(3	)	$	(3	)	$	854		$	298		$	556
Reclassification adjustment for net realized gains included in net income		65			22			43			198			69			129
Net unrealized gains (losses) recognized in other comprehensive income or loss		(71	)		(25	)		(46	)		656			229			427
Postretirement benefit gain not yet recognized in net income arising during the period		1			—			1			1			—			1
Reclassification adjustment for the amortization of net actuarial loss and prior service cost included in net income (a)		(9	)		(4	)		(5	)		(26	)		(10	)		(16	)
Net change in postretirement benefit costs not yet recognized in net income		10			4			6			27			10			17
Foreign currency translation losses		(40	)		(14	)		(26	)		(62	)		(21	)		(41	)
Total other comprehensive income (loss)	$	(101	)	$	(35	)	$	(66	)	$	621		$	218		$	403

(a) Postretirement benefit costs recognized in net income during the period are included among several of the loss and expense components presented in the consolidated statements of income.

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6) Segments Information

The principal business of the Corporation is the sale of property and casualty insurance. The profitability of the property and casualty insurance business depends on the results of both underwriting operations and investments, which are viewed as two distinct operations. The underwriting operations are managed and evaluated separately from the investment function.

The property and casualty insurance subsidiaries underwrite most lines of property and casualty insurance. Underwriting operations consist of four separate business units: personal insurance, commercial insurance, specialty insurance and reinsurance assumed. The personal segment targets the personal insurance market. The personal classes include automobile, homeowners and other personal coverages. The commercial segment includes those classes of business that are generally available in broad markets and are of a more commodity nature. Commercial classes include multiple peril, casualty, workers’ compensation and property and marine. The specialty segment includes those classes of business that are available in more limited markets since they require specialized underwriting and claim settlement. Specialty classes include professional liability coverages and surety. The reinsurance assumed business has been in runoff since the transfer of the ongoing reinsurance assumed business to a reinsurance company in 2005.

Corporate and other includes investment income earned on corporate invested assets, corporate expenses and the results of the Corporation’s non-insurance subsidiaries.

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Revenues and income before income tax of each operating segment were as follows:

	Periods Ended September 30
	Third Quarter						Nine Months
	2015			2014			2015			2014
	(in millions)
Revenues
Property and casualty insurance
Premiums earned
Personal insurance	$	1,114		$	1,118		$	3,364		$	3,296
Commercial insurance		1,390			1,338			4,077			3,943
Specialty insurance		662			663			1,964			1,972
Total insurance		3,166			3,119			9,405			9,211
Reinsurance assumed		—			—			(1	)		1
		3,166			3,119			9,404			9,212
Investment income		322			338			982			1,034
Total property and casualty insurance		3,488			3,457			10,386			10,246
Corporate and other		8			7			25			25
Realized investment gains, net		82			110			113			351
Total revenues	$	3,578		$	3,574		$	10,524		$	10,622
Income (loss) before income tax
Property and casualty insurance
Underwriting
Personal insurance	$	154		$	141		$	213		$	188
Commercial insurance		207			151			446			333
Specialty insurance		161			133			448			355
Total insurance		522			425			1,107			876
Reinsurance assumed		4			—			7			1
		526			425			1,114			877
Increase (decrease) in deferred policy acquisition costs		(1	)		14			44			48
Underwriting income		525			439			1,158			925
Investment income		310			327			949			1,004
Other charges		(4	)		—			(4	)		(4	)
Total property and casualty insurance		831			766			2,103			1,925
Corporate and other		(66	)		(58	)		(209	)		(177	)
Realized investment gains, net		82			110			113			351
Total income before income tax	$	847		$	818		$	2,007		$	2,099

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7) Fair Values of Financial Instruments

Fair values of financial instruments are determined by management using valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs. Fair values are generally measured using quoted prices in active markets for identical assets or liabilities or other inputs, such as quoted prices for similar assets or liabilities, that are observable, either directly or indirectly. In those instances where observable inputs are not available, fair values are measured using unobservable inputs for the asset or liability. Unobservable inputs reflect the Corporation’s own assumptions about the assumptions that market participants would use in pricing the asset or liability and are developed based on the best information available in the circumstances. Fair value estimates derived from unobservable inputs are affected by the assumptions used, including the discount rates and the estimated amounts and timing of future cash flows. The derived fair value estimates cannot be substantiated by comparison to independent markets and are not necessarily indicative of the amounts that would be realized in a current market exchange. Certain financial instruments, particularly insurance contracts, are excluded from fair value disclosure requirements.

The methods and assumptions used to estimate the fair values of financial instruments are as follows:

(i) The carrying value of short term investments approximates fair value due to the short maturities of these investments.

(ii) Fair values of fixed maturities are determined by management, utilizing prices obtained from a third party, nationally recognized pricing service or, in the case of securities for which prices are not provided by a pricing service, from third party brokers. For fixed maturities that have quoted prices in active markets, market quotations are provided. For fixed maturities that do not trade on a daily basis, the pricing service and brokers provide fair value estimates using a variety of inputs including, but not limited to, benchmark yields, reported trades, broker/dealer quotes, issuer spreads, bids, offers, reference data, prepayment rates and measures of volatility. Management reviews on an ongoing basis the reasonableness of the methodologies used by the relevant pricing service and brokers. In addition, management, using the prices received for the securities from the pricing service and brokers, determines the aggregate portfolio price performance and reviews it against applicable indices. If management believes that significant discrepancies exist, it will discuss these with the relevant pricing service or broker to resolve the discrepancies.

(iii) Fair values of equity securities are determined by management, utilizing quoted market prices.

(iv) Fair values of long term debt issued by Chubb are determined by management, utilizing prices obtained from a third party, nationally recognized pricing service.

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The carrying values and fair values of financial instruments were as follows:

	September 30, 2015				December 31, 2014
	Carrying Value		Fair Value		Carrying Value		Fair Value
	(in millions)
Assets
Invested assets
Short term investments	$	3,052	$	3,052	$	1,318	$	1,318
Fixed maturities		37,016		37,016		38,780		38,780
Equity securities		1,771		1,771		1,964		1,964
Liabilities
Long term debt		3,300		3,788		3,300		4,013

At September 30, 2015 and December 31, 2014, a pricing service provided fair value amounts for approximately 99% of the Corporation’s fixed maturities. The prices obtained from a pricing service and brokers generally are non-binding, but are reflective of current market transactions in the applicable financial instruments.

At September 30, 2015 and December 31, 2014, the Corporation held an insignificant amount of financial instruments in its investment portfolio for which a lack of market liquidity impacted the determination of fair value.

The fair value hierarchy prioritizes the inputs to valuation techniques used to measure fair value into three broad levels as follows:

Level 1 – Unadjusted quoted prices in active markets for identical financial instruments.

Level 2 – Other inputs that are observable for the financial instrument, either directly or indirectly.

Level 3 – Significant unobservable inputs.

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The fair value of financial instruments categorized based upon the lowest level of input that was significant to the fair value measurement was as follows:

	September 30, 2015
	Level 1		Level 2		Level 3		Total
	(in millions)
Assets
Short term investments	$	277	$	2,775	$	—	$	3,052
Fixed maturities
Tax exempt		—		19,871		2		19,873
Taxable
U.S. government and government agency and authority obligations		—		1,312		—		1,312
Corporate bonds		—		8,431		193		8,624
Foreign government and government agency obligations		—		6,122		—		6,122
Residential mortgage-backed securities		—		122		2		124
Commercial mortgage-backed securities		—		961		—		961
		—		16,948		195		17,143
Total fixed maturities		—		36,819		197		37,016
Equity securities		1,765		—		6		1,771
	$	2,042	$	39,594	$	203	$	41,839
Liabilities
Long term debt	$	—	$	3,788	$	—	$	3,788

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	December 31, 2014
	Level 1		Level 2		Level 3		Total
	(in millions)
Assets
Short term investments	$	206	$	1,112	$	—	$	1,318
Fixed maturities
Tax exempt		—		19,769		3		19,772
Taxable
U.S. government and government agency and authority obligations		—		2,007		—		2,007
Corporate bonds		—		8,912		116		9,028
Foreign government and government agency obligations		—		6,663		9		6,672
Residential mortgage-backed securities		—		210		1		211
Commercial mortgage-backed securities		—		1,090		—		1,090
		—		18,882		126		19,008
Total fixed maturities		—		38,651		129		38,780
Equity securities		1,958		—		6		1,964
	$	2,164	$	39,763	$	135	$	42,062
Liabilities
Long term debt	$	—	$	4,013	$	—	$	4,013

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8) Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share:

	Periods Ended September 30
	Third Quarter				Nine Months
	2015		2014		2015		2014
	(in millions, except for per share amounts)
Basic earnings per share:
Net income	$	601	$	594	$	1,470	$	1,542
Weighted average shares outstanding		229.4		240.2		231.2		244.8
Basic earnings per share	$	2.62	$	2.47	$	6.36	$	6.30
Diluted earnings per share:
Net income	$	601	$	594	$	1,470	$	1,542
Weighted average shares outstanding		229.4		240.2		231.2		244.8
Additional shares from assumed issuance of shares under stock-based compensation awards		1.7		.4		.9		.6
Weighted average shares and potential shares assumed outstanding for computing diluted earnings per share		231.1		240.6		232.1		245.4
Diluted earnings per share	$	2.60	$	2.47	$	6.33	$	6.28

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Item 2 — Management’s Discussion and Analysis of Financial Condition and Results of Operations

Management’s Discussion and Analysis of Financial Condition and Results of Operations (MD&A) addresses the financial condition of the Corporation as of September 30, 2015 compared with December 31, 2014 and the results of operations for the nine months and three months ended September 30, 2015 and 2014. This discussion should be read in conjunction with the condensed consolidated financial statements and related notes contained in this report and the consolidated financial statements and related notes and management’s discussion and analysis of financial condition and results of operations included in Chubb’s Annual Report on Form 10-K for the year ended December 31, 2014. References to “we,” “us” and “our” appearing in the Form 10-Q should be read as referring to the Corporation.

Cautionary Statement Regarding Forward-Looking Information

Certain statements in this document are “forward-looking statements” as that term is defined in the Private Securities Litigation Reform Act of 1995 (PSLRA). These forward-looking statements are made pursuant to the safe harbor provisions of the PSLRA and include statements regarding the pending acquisition of Chubb by ACE Limited (ACE) discussed below; the payment by Chubb and its property and casualty subsidiaries of dividends that may be used in connection with ACE’s funding of the cash consideration to be paid to Chubb shareholders in connection with the acquisition of Chubb by ACE discussed below; our loss reserve and reinsurance recoverable estimates; market conditions affecting us and our competitors in 2015, including premium volume, rate trends, pricing and competition; the cost of our property reinsurance program in 2015; property and casualty investment income; cash flows generated by our investments; our limited partnership investments; and our financial position, capital adequacy and funding of liquidity needs. Forward-looking statements frequently can be identified by words such as “believe,” “expect,” “anticipate,” “intend,” “plan,” “will,” “may,” “should,” “could,” “would,” “likely,” “estimate,” “predict,” “potential,” “continue,” or other similar expressions. Forward-looking statements are made based upon management’s current expectations and beliefs concerning trends and future developments and their potential effects on us. These statements are not guarantees of future performance. Actual results may differ materially from those suggested by forward-looking statements as a result of risks and uncertainties, which include, among others, those discussed or identified in our Annual Report on Form 10-K for the year ended December 31, 2014 and from time to time in our other public filings with the Securities and Exchange Commission and those associated with:

• the ability of Chubb or ACE to satisfy the conditions to the closing of the pending acquisition or the length of time required to do so;

• global political, economic and market conditions, particularly in the jurisdictions in which we operate and/or invest, including:

— changes in credit ratings, interest rates, market credit spreads and the performance of the financial markets;

— currency fluctuations;

— the effects of inflation;

— changes in domestic and foreign laws, regulations and taxes;

— changes in competition and pricing environments;

— regional or general changes in asset valuations;

— the inability to reinsure certain risks economically; and

— changes in the litigation environment;

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• the effects of the outbreak or escalation of war or hostilities;

• the occurrence of terrorist attacks, including any nuclear, biological, chemical or radiological events;

• premium pricing and profitability or growth estimates overall or by lines of business or geographic area, and related expectations with respect to the timing and terms of any required regulatory approvals;

• adverse changes in loss cost trends;

• our ability to retain existing business and attract new business at acceptable rates;

• our expectations with respect to cash flow and investment income and with respect to other income;

• the adequacy of our loss reserves, including:

— our expectations relating to reinsurance recoverables;

— the willingness of parties, including us, to settle disputes;

— developments in judicial decisions or regulatory or legislative actions relating to coverage and liability, in particular, for asbestos, toxic waste and other mass tort claims;

— development of new theories of liability;

— our estimates relating to ultimate asbestos liabilities; and

— the impact from the bankruptcy protection sought by various asbestos producers and other related businesses;

• the availability and cost of reinsurance coverage;

• the occurrence of significant weather-related or other natural or human-made disasters, particularly in locations where we have concentrations of risk or changes to our estimates (or the assessments of rating agencies and other third parties) of our potential exposure to such events;

• the impact of economic factors on companies on whose behalf we have issued surety bonds, and in particular, on those companies that file for bankruptcy or otherwise experience deterioration in creditworthiness;

• the effects of disclosures by, and investigations of, companies we insure, particularly with respect to our lines of business that have a longer time span, or tail, between the incidence of a loss and the settlement of the claim;

• the impact of legislative, regulatory, judicial and similar developments on companies we insure, particularly with respect to our longer tail lines of business;

• the impact of legislative, regulatory, judicial and similar developments on our business, including those relating to insurance industry reform, terrorism, catastrophes, the financial markets, solvency standards, capital requirements, accounting guidance and taxation;

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• any downgrade in our claims-paying, financial strength or other credit ratings;

• the ability of our subsidiaries to pay us dividends;

• our ability and the ability of our third party vendors to maintain the availability of systems and safeguard the security of our data in the event of a disaster or other information security incident; and

• our ability to implement management’s strategic plans and initiatives.

Chubb assumes no obligation to update any forward-looking statement set forth in this document, which speak as of the date hereof.

Critical Accounting Estimates and Judgments

The consolidated financial statements include amounts based on informed estimates and judgments of management for transactions that are not yet complete. Such estimates and judgments affect the reported amounts in the financial statements. Those estimates and judgments that were most critical to the preparation of the financial statements involved the determination of loss reserves and the recoverability of related reinsurance recoverables and the evaluation of whether a decline in value of any investment is temporary or other than temporary. These estimates and judgments, which are discussed in Item 7 of our Annual Report on Form 10-K for the year ended December 31, 2014 as supplemented within the following analysis of our results of operations, require the use of assumptions about matters that are highly uncertain and therefore are subject to change as facts and circumstances develop. If different estimates and judgments had been applied, materially different amounts might have been reported in the financial statements.

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Overview

The following highlights do not address all of the matters covered in the other sections of Management’s Discussion and Analysis of Financial Condition and Results of Operations or contain all of the information that may be important to Chubb’s shareholders or the investing public. This overview should be read in conjunction with the other sections of Management’s Discussion and Analysis of Financial Condition and Results of Operations.

• Net income was $1.47 billion in the first nine months of 2015 and $601 million in the third quarter compared with $1.54 billion and $594 million, respectively, in the same periods of 2014. The lower net income in the first nine months of 2015 compared to the same period of 2014 was due to lower net realized investment gains, offset in part by higher operating income. The higher net income in the third quarter of 2015 compared with the same period of 2014 was due to higher operating income, offset in part by lower net realized investment gains.

• Operating income, which we define as net income excluding realized investment gains and losses after tax, was $1.40 billion in the first nine months of 2015 and $547 million in the third quarter compared with $1.31 billion and $522 million, respectively, in the same periods of 2014. The higher operating income in the first nine months and third quarter of 2015 compared with the same periods of 2014 was due to higher underwriting income in our property and casualty insurance business, offset in part by lower property and casualty investment income. Management uses operating income, a non-GAAP financial measure, among other measures, to evaluate its performance because the realization of investment gains and losses in any period could be discretionary as to timing and can fluctuate significantly, which could distort the analysis of operating trends.

• Underwriting results were profitable in the first nine months and third quarter of 2015 and 2014, but more so in the 2015 periods. The combined loss and expense ratio was 87.5% in the first nine months of 2015 and 83.3% in the third quarter compared with 89.6% and 85.8%, respectively, in the same periods of 2014. The 2.1 percentage point decrease in the combined loss and expense ratio in the first nine months of 2015 compared with the same period of 2014 was due to a lower current accident year loss ratio excluding catastrophes. The 2.5 percentage point decrease in the combined loss and expense ratio in the third quarter of 2015 compared with the same period of 2014 was due primarily to a lower impact of castastrophes and, to a lesser extent, a higher amount of favorable prior year loss development. The impact of catastrophes accounted for 4.6 percentage points of the combined ratio in the first nine months of 2015 and 2014. The impact of catastrophes accounted for 1.0 percentage point of the combined ratio in the third quarter of 2015 compared with 2.4 percentage points in the same period of 2014.

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• In the first nine months and third quarter of 2015, we estimate that we experienced overall favorable development of about $475 million and $180 million, respectively, on net loss reserves established as of the previous year end. We estimate that in the first nine months and third quarter of 2014, we experienced overall favorable prior year loss development of about $480 million and $155 million, respectively. In the first nine months and third quarter of both years we experienced favorable prior year loss development in each segment of our insurance business, but more so in our commercial insurance and specialty insurance segments.

• Total net premiums written increased by 1% in the first nine months of 2015 and were flat in the third quarter compared with the same periods of 2014. The growth in net premiums written in the first nine months and third quarter of 2015 was negatively impacted by foreign currency translation, reflecting the impact of the stronger U.S. dollar relative to several currencies in which we wrote business outside the United States in the 2015 periods compared with the same periods of 2014. In the first nine months of 2015, net premiums written outside the United States represented 22% of our total net premiums written. Total net premiums written excluding the effect of foreign currency translation increased by 4% in the first nine months of 2015 and 3% in the third quarter. Net premiums written in the United States increased by 5% in the first nine months of 2015 and 4% in the third quarter. Net premiums written outside the United States decreased by 9% in the first nine months of 2015 and 12% in the third quarter, when measured in U.S. dollars. Excluding the effect of foreign currency translation, such premiums increased by 4% in the first nine months of 2015 and 2% in the third quarter. Management uses growth in net premiums written excluding the effect of foreign currency translation, a non-GAAP financial measure, to evaluate the trends in net premiums written, exclusive of the effect of fluctuations in exchange rates between the U.S. dollar and the foreign currencies in which business is transacted. The impact of foreign currency translation is excluded as exchange rates may fluctuate significantly and the effect of fluctuations could distort the analysis of trends. When excluding the effect of foreign currency translation on growth, management uses the current period average exchange rates to translate both the current period and the prior period foreign currency denominated net premiums written amounts.

• Property and casualty investment income before taxes decreased by 5% in the first nine months and third quarter of 2015 compared with the same periods of 2014. Property and casualty investment income after tax decreased by 5% in the first nine months of 2015 and 6% in the third quarter compared with the same periods of 2014. The decreases in both periods of 2015 were due to a decline in the average yield on our investment portfolio and, to a lesser extent, the effect of foreign currency translation. Management uses property and casualty investment income after tax, a non-GAAP financial measure, to evaluate its investment results because it reflects the impact of any change in the proportion of tax exempt investment income to total investment income and is therefore more meaningful for analysis purposes than investment income before income tax.

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• Net realized investment gains before tax were $113 million ($75 million after tax) in the first nine months of 2015 and $82 million ($54 million after tax) in the third quarter compared with $351 million ($228 million after tax) and $110 million ($72 million after tax), respectively, in the same periods of 2014. The net realized investment gains in the first nine months and third quarter of 2015 were primarily related to investments in limited partnerships, which generally are reported on a one quarter lag, and sales of equity securities. The net realized investment gains in the first nine months and third quarter of 2014 were primarily related to investments in limited partnerships, sales of equity securities and, to a lesser extent, sales of fixed maturity securities.

• On June 30, 2015, Chubb entered into an Agreement and Plan of Merger (Merger Agreement) with ACE, a company organized under the laws of Switzerland, and William Investment Holdings Corporation (Merger Sub), a New Jersey corporation and a wholly owned indirect subsidiary of ACE, pursuant to which Merger Sub will merge with and into Chubb, with Chubb surviving as a wholly owned indirect subsidiary of ACE (the Merger). At the effective time of the Merger, each share (except for certain shares held by ACE, Chubb or their subsidiaries) of common stock of Chubb, par value $1.00 per share, will be converted into the right to receive 0.6019 of a common share of ACE, par value CHF 24.15 per share, and $62.93 in cash. The closing of the Merger is subject to various customary conditions, including receipt of required insurance regulatory and other governmental approvals. Some other closing conditions have already been satisfied, including Chubb shareholder approval of the Merger Agreement, approval by ACE shareholders of certain Merger-related matters and the termination of the applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended. The transaction is expected to close during the first quarter of 2016. The Merger Agreement is discussed further in Note (2) of the Notes to Consolidated Financial Statements and in Capital Resources and Liquidity – Liquidity.

A summary of our consolidated net income is as follows:

	Periods Ended September 30
	Nine Months						Third Quarter
	2015			2014			2015			2014
	(in millions)
Property and casualty insurance	$	2,103		$	1,925		$	831		$	766
Corporate and other		(209	)		(177	)		(66	)		(58	)
Consolidated operating income before income tax		1,894			1,748			765			708
Federal and foreign income tax		499			434			218			186
Consolidated operating income		1,395			1,314			547			522
Realized investment gains after income tax		75			228			54			72
Consolidated net income	$	1,470		$	1,542		$	601		$	594

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Property and Casualty Insurance

A summary of the results of operations of our property and casualty insurance business is as follows:

	Periods Ended September 30
	Nine Months						Third Quarter
	2015			2014			2015			2014
	(in millions)
Underwriting
Net premiums written	$	9,586		$	9,454		$	3,171		$	3,169
Increase in unearned premiums		(182	)		(242	)		(5	)		(50	)
Premiums earned		9,404			9,212			3,166			3,119
Losses and loss expenses		5,260			5,316			1,633			1,679
Operating costs and expenses		2,999			2,987			996			1,004
Decrease (increase) in deferred policy acquisition costs		(44	)		(48	)		1			(14	)
Dividends to policyholders		31			32			11			11
Underwriting income		1,158			925			525			439
Investments
Investment income before expenses		982			1,034			322			338
Investment expenses		33			30			12			11
Investment income		949			1,004			310			327
Other charges		(4	)		(4	)		(4	)		—
Property and casualty income before tax	$	2,103		$	1,925		$	831		$	766
Property and casualty investment income after tax	$	782		$	822		$	255		$	270

Property and casualty income before tax was higher in the first nine months and third quarter of 2015 compared with the same periods of 2014, due to higher underwriting income, offset in part by lower investment income. The higher underwriting income in the first nine months of 2015 compared with the same period of 2014 was due to a lower current accident year loss ratio excluding catastrophes. The higher underwriting income in the third quarter of 2015 compared with the same period of 2014 was due primarily to a lower impact of catastrophes and, to a lesser extent, a higher amount of favorable prior year loss development. The lower investment income in the first nine months and third quarter of 2015 compared with the same periods of 2014 was due to a decline in the average yield on our investment portfolio and, to a lesser extent, the effect of foreign currency translation.

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The profitability of our property and casualty insurance business depends on the results of both our underwriting and investment operations. We view these as two distinct operations since the underwriting functions are managed separately from the investment function. Accordingly, in assessing our performance, we evaluate underwriting results separately from investment results.

Underwriting Results

We evaluate the underwriting results of our property and casualty insurance business in the aggregate and for each of our business units.

Net Premiums Written

Net premiums written were $9.6 billion in the first nine months of 2015 compared with $9.5 billion in the same period of 2014. Net premiums written were $3.2 billion in the third quarter of both years. Net premiums written by business unit were as follows:

	Nine Months Ended September 30					% Incr.			Quarter Ended September 30				% Incr.
	2015			2014		(Decr.)			2015		2014		(Decr.)
	(in millions)								(in millions)
Personal insurance	$	3,423		$	3,389		1	%	$	1,156	$	1,167		(1	)%
Commercial insurance		4,206			4,084		3			1,334		1,301		3
Specialty insurance		1,958			1,980		(1	)		681		701		(3	)
Total insurance		9,587			9,453		1			3,171		3,169		—
Reinsurance assumed		(1	)		1		*			—		—		*
Total	$	9,586		$	9,454		1		$	3,171	$	3,169		—

* The change in net premiums written is not presented for this business unit since it is in runoff.

Net premiums written increased by 1% in the first nine months of 2015 compared with the same period of 2014 as a result of growth in premiums written in the United States. Net premiums written were flat in the third quarter of 2015 compared with the same period of 2014 as growth inside the United States was offset by a decline outside the United States. The growth in net premiums written in the first nine months and third quarter of 2015 was negatively impacted by foreign currency translation, reflecting the impact of the stronger U.S. dollar relative to several currencies in which we wrote business outside the United States in the 2015 periods compared with the same periods of 2014. Net premiums written excluding the effect of foreign currency translation increased by 4% in the first nine months of 2015 and 3% in the third quarter. Net premiums written in the United States, which in the first nine months of 2015 represented 78% of our total net premiums written, increased by 5% in the first nine months of 2015 and 4% in the third quarter. Net premiums written outside the United States decreased by 9% in the first nine months of 2015 and 12% in the third quarter, when measured in U.S. dollars. Excluding the effect of foreign currency translation, such premiums increased by 4% in the first nine months of 2015 and 2% in the third quarter.

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We classify business as written inside or outside the United States based on the location of the risks associated with the underlying policies. The method of determining location of risk varies by class of business. Location of risk for property classes is typically based on the physical location of the covered property, while location of risk for liability classes may be based on the main location of the insured, or in the case of the workers’ compensation class, the primary work location of the covered employee.

Net premiums written in the United States grew in each segment of our business in the first nine months of 2015 compared with the same period of 2014, with the most significant growth occurring in our personal insurance and commercial insurance segments. Net premiums written in the United States also grew in our personal insurance and commercial insurance segments in the third quarter of 2015 compared with the same period of 2014, but were flat in our specialty insurance segment. Growth in the United States in our personal insurance segment in both periods of 2015 reflected higher insured exposures, higher rates upon renewal, strong retention of existing business, and new business. Growth in the United States in the first nine months of 2015 in our commercial insurance segment and our professional liability business, which is the predominant component of our specialty insurance segment, reflected high retention of existing business, new business, as well as renewal rate increases. Growth in the United States in the third quarter in our commercial insurance segment also reflected high retention of existing business and new business, but renewal rates were flat. Net premiums written in the United States in the third quarter of 2015 in our professional liability business reflected strong retention and new business, as well as slightly higher renewal rates and insured exposures.

Average renewal rates in the United States in our personal insurance segment were up slightly in the first nine months and third quarter of 2015 compared with expiring rates. The amounts of coverage purchased or the insured exposures, both of which are bases upon which we calculate the premiums we charge, were up modestly in the United States in the first nine months and third quarter of 2015. Retention levels in our personal insurance segment in the United States remained strong in the first nine months and third quarter of 2015. The amount of new business in the United States in our personal insurance segment was higher in the first nine months and third quarter of 2015, but more so in the third quarter, compared with the same periods of 2014.

Average renewal rates in the United States in the first nine months of 2015 were up slightly in our commercial insurance segment and up modestly in our professional liability business compared with expiring rates. In the third quarter, such rates were flat in our commercial insurance segment and up slightly in our professional liability business compared with expiring rates. On average, the amounts of coverage purchased or the insured exposures upon renewal were flat in our commercial insurance segment in the United States in the first nine months and third quarter of 2015. Such amounts were up slightly in our professional liability business in the first nine months and third quarter of 2015. We continued to retain a high percentage of our existing commercial insurance and professional liability business in the United States in the first nine months and third quarter of 2015. Retention levels in the first nine months of 2015 were modestly higher in our commercial insurance segment and

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slightly higher in our professional liability business compared with the same period of 2014. In the third quarter of 2015, such levels were slightly higher in our commercial insurance segment and flat in our professional liability business compared with the same period of 2014. As portions of our business have approached rate adequacy due to pricing and underwriting actions over the past several years, the level of renewal rate increases has moderated and we have sought to maintain high retention levels. The amount of new business in the United States was up in both our commercial insurance segment and professional liability business in the first nine months and third quarter of 2015 compared with the same periods of 2014, but more so in our commercial insurance segment.

The decrease in net premiums written outside the United States in the first nine months and third quarter of 2015 compared with the same periods of 2014 reflected decreases in each segment of our insurance business driven primarily by the negative effect of foreign currency translation. In both periods, the most significant decrease occurred in our personal insurance segment. Net premiums written outside the United States excluding the effect of foreign currency translation increased by 4% in the first nine months of 2015, with the most significant growth occurring in our commercial insurance segment, a modest increase in our specialty insurance segment and a slight increase in our personal insurance segment. In the third quarter of 2015, net premiums written outside the United States excluding the effect of foreign currency translation increased by 2%, with a modest increase occurring in our commercial insurance and specialty insurance segments and a slight decrease in our personal insurance segment.

Average renewal rates outside the United States in our personal insurance segment were higher in the first nine months and third quarter of 2015 compared with expiring rates, driven particularly by the automobile class.

Average renewal rates outside the United States were flat in both our commercial insurance segment and professional liability business in the first nine months of 2015. Such rates were also flat in our commercial insurance segment, but down slightly in our professional liability business in the third quarter compared with expiring rates. On average, the amounts of coverage purchased or the insured exposures upon renewal were up slightly in the first nine months of 2015 and up modestly in the third quarter in our commercial insurance segment outside the United States. Such amounts were flat in our professional liability business outside the United States in the first nine months and third quarter of 2015. We continued to retain a high percentage of our existing commercial and professional liability business outside the United States in the first nine months and third quarter of 2015. Retention levels in the first nine months of 2015 were flat in our commercial insurance segment and up slightly in our professional liability business compared with the same period of 2014. Retention levels in the third quarter of 2015 were down modestly in our commercial insurance segment and down slightly in our professional liability business compared with the same period of 2014. The amount of new business outside the United States in the first nine months and third quarter of 2015 compared with the same periods of 2014 was lower in both our commercial insurance segment and professional liability business.

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We expect that during the remainder of 2015, market conditions will remain competitive. We also expect that our net premiums written in the fourth quarter of 2015 will be negatively impacted by foreign currency translation, assuming average foreign currency to U.S. dollar exchange rates for the major currencies in which we write business remain similar to the September 30, 2015 levels.

Ceded Reinsurance

Our premiums written are net of amounts ceded to reinsurers who assume a portion of the risk under the insurance policies we write that are subject to reinsurance.

The most significant component of our ceded reinsurance program is property reinsurance. We purchase two main types of property reinsurance: catastrophe and property per risk.

For property risks in the United States and Canada we purchase traditional catastrophe reinsurance, including our primary treaty, which we refer to as the North American catastrophe treaty, as well as supplemental catastrophe reinsurance that provides additional coverage for our exposures in the northeast United States. For certain exposures in the United States, we have also arranged for the purchase of reinsurance funded through the issuance of multi–year, collateralized risk-linked securities, known as catastrophe bonds. For events outside the United States, we also purchase traditional catastrophe reinsurance.

We renewed our primary traditional property catastrophe treaties and our commercial property per risk treaty in April 2015 with limit structures similar to the expiring treaties and with modest enhancements in coverage, as well as in terms and conditions. The supplemental catastrophe reinsurance that provides coverage for our exposures in the northeast United States remains in effect until June 2016. In March 2015, we arranged for the purchase of reinsurance through the issuance of a catastrophe bond to replace the portion of a catastrophe bond that expired in March 2015.

The North American catastrophe treaty has an initial retention of $500 million and provides coverage for exposures in the United States and Canada of approximately 34% of losses (net of recoveries from other available reinsurance) between $500 million and $900 million and approximately 75% of losses (net of recoveries from other available reinsurance) between $900 million and $1.75 billion. For certain catastrophic events in the northeast United States or along the southern U.S. coastline, the combination of the North American catastrophe treaty, the supplemental catastrophe reinsurance and/or the catastrophe bond arrangements provides additional coverage as discussed below.

The catastrophe bond arrangements provide reinsurance coverage for specific types of losses in specific geographic locations. They are generally designed to supplement coverage provided under the North American catastrophe treaty. We currently have three catastrophe bond arrangements in effect that expire between 2016 and 2020. We have a $150 million arrangement that expires in March 2016 that provides reinsurance coverage for our exposure to homeowners-related hurricane and severe thunderstorm losses in eight states along the southern U.S. coastline. We have a $270 million arrangement that expires in March 2018. We also have a $250 million arrangement that incepted in March 2015 and expires in March 2020, which replaced a $250 million arrangement that

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expired in March 2015. Both of the latter two catastrophe bond arrangements provide reinsurance coverage for our exposure to homeowners and commercial losses related to certain perils, including hurricanes and other named storms, earthquakes, severe thunderstorms and winter storms in 12 states in the northeast United States and the District of Columbia.

For the indicated catastrophic events in the northeast United States, the combination of the North American catastrophe treaty, the supplemental catastrophe reinsurance, and the $270 million and $250 million catastrophe bond arrangements provides additional coverage of approximately 63% of losses (net of recoveries from other available reinsurance) between $1.75 billion and $3.67 billion.

For hurricane and severe thunderstorm events along the southern U.S. coastline, the $150 million catastrophe bond arrangement provides additional coverage of approximately 45% of homeowners-related hurricane and severe thunderstorm losses (net of recoveries from other available reinsurance) between $875 million and $1.21 billion.

For hurricane events in Florida, in addition to the coverage provided by the North American catastrophe treaty and the $150 million catastrophe bond arrangement discussed above, we have reinsurance from the Florida Hurricane Catastrophe Fund, which is a state-mandated fund designed to reimburse insurers for a portion of their residential catastrophe-related hurricane losses. Our participation in this program, for which the most recent annual period began on June 1, 2015, provides coverage of 90% of homeowners-related hurricane losses in Florida in excess of our initial retention of $140 million per event. Under the terms of the program, our aggregate recoveries during the annual coverage period are limited to approximately $340 million, based on our current level of participation.

Our primary property catastrophe treaty for events outside the continental United States, including Canada, provides coverage of approximately 75% of losses (net of recoveries from other available reinsurance) between $100 million and $350 million. For catastrophic events in Australia and Canada, additional reinsurance provides coverage of 80% of losses (net of recoveries from other available reinsurance) between $350 million and $475 million.

Our commercial property per risk treaty provides coverage for property exposures both inside and outside the United States. Depending upon the currency in which the covered insurance policy was issued and prevailing foreign currency exchange rates, the treaty provides coverage per risk of approximately $435 million to $690 million in excess of our initial retention, which is generally between $20 million and $25 million.

In addition to our major property catastrophe and property per risk treaties, we purchase several smaller property treaties that provide coverage for specific classes of business or locations having concentrations of risk.

Recoveries under our property reinsurance treaties are subject to certain coinsurance requirements that affect the interaction of some elements of our reinsurance program.

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Our property reinsurance treaties generally contain terrorism exclusions for acts perpetrated by foreign terrorists, and for nuclear, biological, chemical and radiological loss causes, whether such acts are perpetrated by foreign or domestic terrorists.

The renewal rates associated with the North American catastrophe treaty, the catastrophe treaty that covers events outside the United States and the commercial property per risk treaty were lower than the rates for the expiring treaties. The costs related to the reinsurance purchased through the issuance of the catastrophe bond in March 2015 were also lower than those related to the expiring bond. We therefore expect that the overall cost of our property reinsurance program will be lower in 2015 than in 2014.

Profitability

The combined loss and expense ratio (or combined ratio), expressed as a percentage, is the key measure of underwriting profitability traditionally used in the property and casualty insurance business. Management evaluates the performance of our underwriting operations and of each of our business units using, among other measures, the combined loss and expense ratio calculated in accordance with U.S. statutory accounting principles. It is the sum of the ratio of losses and loss expenses to premiums earned (loss ratio) and the ratio of statutory underwriting expenses to premiums written (expense ratio) after reducing both premium amounts by dividends to policyholders. When the combined ratio is under 100%, underwriting results are generally considered profitable; when the combined ratio is over 100%, underwriting results are generally considered unprofitable.

Statutory accounting principles applicable to U.S. property and casualty insurance companies differ in certain respects from generally accepted accounting principles in the United States (GAAP). Under statutory accounting principles, policy acquisition and other underwriting expenses are recognized immediately, not at the time premiums are earned. Management uses underwriting results determined in accordance with GAAP, among other measures, to assess the overall performance of our underwriting operations. To convert statutory underwriting results to a GAAP basis, certain policy acquisition expenses are deferred and amortized over the period in which the related premiums are earned. Underwriting income determined in accordance with GAAP is defined as premiums earned less losses and loss expenses incurred and GAAP underwriting expenses incurred.

An accident year is the calendar year in which a loss is incurred or, in the case of claims-made policies, the calendar year in which a loss is reported. The total losses and loss expenses incurred for a particular calendar year include current accident year losses and loss expenses as well as any increases or decreases to our estimates of losses and loss expenses that occurred in all prior accident years, which we refer to as prior year loss development.

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Underwriting results for our property and casualty insurance business were profitable in the first nine months and third quarter of 2015 and 2014, but more so in the 2015 periods. The combined loss and expense ratio was as follows:

	Periods Ended September 30
	Nine Months						Third Quarter
	2015			2014			2015			2014
Loss ratio		56.1	%		57.9	%		51.8	%		54.0	%
Expense ratio		31.4			31.7			31.5			31.8
Combined loss and expense ratio		87.5	%		89.6	%		83.3	%		85.8	%

The 1.8 percentage point decrease in the loss ratio in the first nine months of 2015 compared with the same period of 2014 was driven by a lower current accident year loss ratio excluding catastrophes. The 2.2 percentage point decrease in the loss ratio in the third quarter of 2015 compared with the same period of 2014 was due primarily to a lower impact of catastrophes and, to a lesser extent, a higher amount of favorable prior year loss development. The current accident year loss ratio excluding catastrophes was lower in the first nine months of 2015 in each segment of our insurance business compared with the same period of 2014. The current accident year loss ratio excluding catastrophes was lower in the third quarter of 2015 in our specialty insurance segment, similar in our personal insurance segment and slightly higher in our commercial insurance segment compared with the same period of 2014. The loss ratio in the first nine months reflected the significant impact of catastrophes experienced in the first six months of both years. The impact of catastrophes was more modest in the third quarter of both years. The loss ratio in the first nine months and third quarter of 2015 and 2014 also reflected favorable loss experience excluding catastrophes that we believe resulted from our disciplined underwriting in recent years. The loss ratio in the first nine months and third quarter of both years also benefited from the positive impact of rate increases on premiums earned in most classes of business as well as favorable prior year loss development.

Our underwriting profitability in any given period will be affected by the impact of catastrophes in that period. We define a catastrophe as an event that is estimated to cause $25 million or more in industry-wide insured property losses and affects a significant number of policyholders and insurers.

The net impact of catastrophes in the first nine months of 2015 was $430 million, which represented 4.6 percentage points of the combined ratio, compared with $419 million or 4.6 percentage points in the same period of 2014. The net impact of catastrophes in the third quarter of 2015 was $32 million, which represented 1.0 percentage point of the combined ratio, compared with $74 million or 2.4 percentage points in the same period of 2014. Most of the catastrophe losses in the first nine months of 2015 and 2014 related to weather-related events in the United States.

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The impact of catastrophes, including losses and any related reinsurance reinstatement premiums, for individually significant events and all other events was as follows:

Nine Months Ended September 30	Impact of Catastrophes
	(in millions)
2015
Winter freeze – Mid-Atlantic and Northeast United States – February 2015	$	154
Other events		276
Total	$	430
2014
Winter freeze – 17 states in the United States – January 2014	$	121
Other events		298
Total	$	419

The net impact of catastrophes in the first nine months of 2015 reflected $12 million of favorable prior year loss development. The net impact of catastrophes in the first nine months of 2014 reflected no prior year loss development. The net impact of catastrophes in the third quarter of 2015 reflected $3 million of unfavorable prior year loss development compared with $8 million in the same period of 2014.

The expense ratio decreased by 0.3 of a percentage point in the first nine months and third quarter of 2015 compared with the same periods of 2014. The decrease in the expense ratio in the first nine months of 2015 was due primarily to growth in net premiums written while overhead expenses were flat compared with the same period of 2014. The decrease in the third quarter of 2015 was due primarily to lower commissions outside the United States and, to a lesser extent, lower overhead expenses compared with the same period of 2014.

Review of Underwriting Results by Business Unit

Personal Insurance

Net premiums written in our personal insurance segment, which represented 36% of our total net premiums written in the first nine months of 2015, increased by 1% in the first nine months of 2015 and decreased by 1% in the third quarter compared with the same periods of 2014. Net premiums written for the classes of business within the personal insurance segment were as follows:

	Nine Months Ended September 30				% Incr.			Quarter Ended September 30				% Incr.
	2015		2014		(Decr.)			2015		2014		(Decr.)
	(in millions)							(in millions)
Automobile	$	539	$	558		(3	)%	$	174	$	190		(8	)%
Homeowners		2,139		2,093		2			745		735		1
Other		745		738		1			237		242		(2	)
Total personal	$	3,423	$	3,389		1		$	1,156	$	1,167		(1	)

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The increase in net premiums written in our personal insurance segment in the first nine months of 2015 compared with the same period of 2014 was driven by growth in the United States, offset in part by a decrease in net premiums written outside the United States. The decrease in net premiums written in our personal insurance segment in the third quarter of 2015 compared with the same period of 2014 was driven by a decrease in net premiums written outside the United States, offset in part by growth inside the United States. Premium growth occurred in all classes of our personal insurance segment in the first nine months and third quarter of 2015 in the United States. Net premiums written outside the United States decreased in all classes of this segment in the first nine months and third quarter of 2015. In both periods, net premiums written reflected the negative effect of foreign currency translation. Excluding the effect of foreign currency translation, net premiums written outside the United States increased slightly in the first nine months of 2015 and decreased slightly in the third quarter compared with the same periods of 2014. The overall growth in our personal insurance segment excluding the effect of foreign currency translation was 4% in the first nine months of 2015 and 3% in the third quarter. Such growth reflected higher insured exposures, higher rates upon renewal, strong retention of existing business, and new business.

Net premiums written for our personal automobile business decreased in the first nine months and third quarter of 2015 compared with the same periods of 2014, driven by a decrease in net premiums written outside the United States, which reflected the negative effect of foreign currency translation and underwriting actions in Brazil. Personal automobile net premiums written outside the United States represented approximately 35% of our total personal automobile net premiums written in the first nine months of 2015, with approximately half of such premiums written in Brazil. Personal automobile net premiums written outside the United States represented approximately 30% of our total personal automobile net premiums written in the third quarter of 2015, with approximately 40% of such premiums written in Brazil. Personal automobile net premiums written in the United States increased modestly in the first nine months and third quarter of 2015 compared with the same periods of 2014.

Net premiums written for our homeowners business increased in the first nine months and third quarter of 2015 compared with the same periods of 2014, due to growth in the United States, reflecting increases in the values insured on existing policies, higher renewal rates, strong retention of existing business, and new business. Net premiums written outside the United States for our homeowners business decreased in the first nine months and third quarter of 2015 compared with the same periods of 2014, due to the negative effect of foreign currency translation.

Net premiums written for our other personal business, which includes accident and health, excess liability and yacht coverages, increased in the first nine months of 2015 compared with the same period of 2014, as growth inside the United States was mostly offset by a decrease in net premiums written outside the United States. The decrease in net premiums written outside the United States for our other personal business in the first nine months of 2015 compared with the same period of 2014 was due to the negative effect of foreign currency translation. Net premiums written for our other personal business decreased in the third quarter of 2015 compared with the same period of 2014,

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driven by a significant decrease in net premiums written outside the United States due to the negative effect of foreign currency translation. Net premiums written in the United States increased in the third quarter of 2015. Premiums for our accident and health business, about half of which was written outside the United States in the first nine months of 2015, decreased slightly in the first nine months of 2015 and decreased modestly in the third quarter compared with the same periods of 2014. The decreases in accident and health premiums written in the 2015 periods were caused by decreases in premiums written outside the United States due to the negative effect of foreign currency translation. Premiums for our accident and health business written in the United States increased significantly in the first nine months of 2015, but increased only slightly in the third quarter compared with the same periods of 2014. Premiums for our excess liability business, most of which is written in the United States, increased in the first nine months and third quarter of 2015 compared with the same periods of 2014.

Our personal insurance segment produced similarly profitable underwriting results in the first nine months of 2015 and 2014. Results for our personal insurance segment were also profitable in the third quarter of both years, but more so in 2015. The combined loss and expense ratios for the classes of business within the personal insurance segment were as follows:

	Periods Ended September 30
	Nine Months						Third Quarter
	2015			2014			2015			2014
Automobile		98.1	%		97.4	%		98.5	%		95.2	%
Homeowners		91.7			92.2			77.2			80.3
Other		93.5			93.7			97.6			95.4
Total personal		93.1			93.3			84.9			85.9

The combined loss and expense ratio for our personal insurance segment was similar in the first nine months of 2015 and 2014, reflecting slightly improved results in our homeowners and other personal businesses, mostly offset by slightly worse results in our automobile business. The 1.0 percentage point decrease in the combined loss and expense ratio for our personal insurance segment in the third quarter of 2015 compared with the same period of 2014 was driven by improved results for our homeowners business, partially offset by worse results in our personal automobile and other personal businesses. The impact of catastrophes accounted for 9.4 percentage points of the combined ratio for our personal insurance segment in the first nine months of 2015 and 2.0 percentage points in the third quarter compared with 7.3 and 3.5 percentage points, respectively, in the same periods of 2014.

Personal automobile results were less profitable in the first nine months of 2015 compared with the same period of 2014, as modestly worse results outside the United States in 2015 were partially offset by slightly better results inside the United States. Our personal automobile business produced profitable results in the United States in the first nine months of both years, but slightly more so in 2015. Personal automobile results outside the United States were unprofitable in the first nine months of 2015 compared with near breakeven results in the same period of 2014. Personal automobile results were profitable

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in the third quarter of 2015 and 2014, but more so in 2014. The 3.3 percentage point increase in the combined ratio in the third quarter of 2015 compared with the same period of 2014 reflected a deterioration in our personal automobile results outside the United States. Results in the United States were similarly profitable in the third quarter of 2015 and 2014. Results outside the United States were unprofitable in the third quarter of 2015 compared with modestly profitable results in the same period of 2014.

Homeowners results were profitable in the first nine months of 2015 and 2014. The 0.5 of a percentage point decrease in the combined ratio in the first nine months of 2015 compared with the same period of 2014 was mainly due to a lower current accident year loss ratio excluding catastrophes, substantially offset by a higher impact of catastrophes. Homeowners results were profitable in the third quarter of both years, but more so in 2015. The 3.1 percentage point decrease in the combined ratio in the third quarter of 2015 compared with the same period of 2014 was due primarily to a lower impact of catastrophes. The impact of catastrophes accounted for 14.9 percentage points of the combined ratio for this class in the first nine months of 2015 and 3.0 percentage points in the third quarter compared with 11.8 and 5.6 percentage points, respectively, in the same periods of 2014.

Other personal results were similarly profitable in the first nine months of 2015 and 2014 as improved results in the excess liability and accident and health components of this business were substantially offset by worse results in the yacht component. Other personal results were profitable in the third quarter of both years, but more so in 2014, due primarily to better results in the yacht component of this business. Results for the excess liability component of our other personal business were highly profitable in the first nine months of both years, but more so in 2015. Results for this component were also highly profitable in the third quarter of both years, but more so in 2014. Excess liability results benefited from favorable prior year loss development in the first nine months and third quarter of both years. The accident and health component of our other personal business produced near breakeven results in the first nine months of 2015 compared with slightly unprofitable results in the same period of 2014. Results for this component were modestly unprofitable in the third quarter of both years, but more so in 2014. In the first nine months and third quarter of both years, results for our accident and health business were profitable in the United States and unprofitable outside the United States. Our yacht business produced unprofitable results in the first nine months and third quarter of 2015 compared with highly profitable results in the same periods of 2014.

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Commercial Insurance

Net premiums written in our commercial insurance segment, which represented 44% of our total net premiums written in the first nine months of 2015, increased by 3% in the first nine months and third quarter of 2015 compared with the same periods of 2014. Net premiums written for the classes of business within the commercial insurance segment were as follows:

	Nine Months Ended September 30				% Incr. (Decr.)			Quarter Ended September 30				%  Incr. (Decr.)
	2015		2014					2015		2014
	(in millions)							(in millions)
Multiple peril	$	843	$	837		1	%	$	289	$	291		(1	)%
Casualty		1,243		1,251		(1	)		396		401		(1	)
Workers’ compensation		989		874		13			326		279		17
Property and marine		1,131		1,122		1			323		330		(2	)
Total commercial	$	4,206	$	4,084		3		$	1,334	$	1,301		3

Growth in net premiums written in our commercial insurance segment in the first nine months and third quarter of 2015 compared with the same periods of 2014 was driven by growth in the United States. Net premiums written outside the United States decreased in the first nine months and third quarter of 2015, more so in the third quarter, due to the negative effect of foreign currency translation. Excluding the effect of foreign currency translation, net premiums written outside the United States increased in both periods of 2015. Overall premium growth in our commercial insurance segment excluding the effect of foreign currency translation was 6% in the first nine months of 2015 and 5% in the third quarter. Such growth in both periods primarily reflected high retention and new business. The most significant growth in our commercial insurance segment in the first nine months and third quarter of 2015 occurred in the workers’ compensation class, which is primarily written in the United States, reflecting high retention, increased renewal exposure and new business. In the first nine months and third quarter of 2015, net premiums written for the other classes within our commercial insurance segment increased or decreased only slightly, reflecting the negative effect of foreign currency translation on net premiums written outside the United States. Average renewal rates in our commercial insurance segment in the United States were up slightly in the first nine months of 2015 but flat in the third quarter compared with expiring rates. Average renewal rates outside the United States were flat in the first nine months and third quarter of 2015 compared to expiring rates. Retention levels of our existing policyholders were strong in the first nine months and third quarter of both years. Retention levels in the United States were modestly higher in the first nine months of 2015 and slightly higher in the third quarter compared with the same periods of 2014. Retention levels outside the United States were flat in the first nine months of 2015 and down modestly in the third quarter compared with the same periods of 2014. The average renewal exposure change was flat in the United States in the first nine months and third quarter of 2015. The average renewal exposure change was up slightly outside the United States in the first nine months of 2015 and up modestly in the third quarter. The amount of new business was higher in the United States in the first nine months and third quarter of 2015 compared with the same periods of 2014. The amount of new business was lower outside the United States in the first nine months and third quarter of 2015 compared with the same periods of 2014.

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Our commercial insurance segment produced profitable underwriting results in the first nine months and third quarter of 2015 and 2014, but more so in the 2015 periods. The combined loss and expense ratios for the classes of business within the commercial insurance segment were as follows:

	Periods Ended September 30
	Nine Months						Third Quarter
	2015			2014			2015			2014
Multiple peril		88.9	%		88.4	%		78.2	%		81.9	%
Casualty		85.9			90.0			84.5			95.3
Workers’ compensation		87.3			84.1			87.0			83.9
Property and marine		90.7			97.3			94.5			93.3
Total commercial		88.0			90.4			86.3			89.5

The 2.4 percentage point decrease in the combined loss and expense ratio for our commercial insurance segment in the first nine months of 2015 compared with the same period of 2014 was due to a lower impact of catastrophes and a lower current accident year loss ratio excluding catastrophes, offset in part by a lower amount of favorable prior year loss development. The 3.2 percentage point decrease in the combined loss and expense ratio for our commercial insurance segment in the third quarter of 2015 compared with the same period of 2014 was due primarily to a lower impact of catastrophes and a higher amount of favorable prior year loss development. The impact of catastrophes accounted for 2.8 percentage points of the combined ratio for our commercial insurance segment in the first nine months of 2015 and 0.7 of a percentage point in the third quarter compared with 4.5 and 2.6 percentage points, respectively, in the same periods of 2014. Results for our commercial insurance segment in the first nine months and third quarter of 2015 and 2014 benefited from favorable prior year loss development and our disciplined risk selection in recent years.

Multiple peril results were profitable in the first nine months of 2015 and 2014. Multiple peril results were also profitable in the third quarter of both years, but more so in 2015. The 0.5 of a percentage point increase in the combined ratio in the first nine months of 2015 compared with the same period of 2014 was due to less profitable results for the property component of this business, offset in part by more profitable results in the liability component. The 3.7 percentage point decrease in the combined ratio in the third quarter of 2015 compared with the same period of 2014 was due to better results in the property component of this business. Results for the property component of this business were profitable in the first nine months of 2015 compared with highly profitable results in the same period of 2014. Results for this component were highly profitable in the third quarter of both years. Results for the liability component of this business were highly profitable in the first nine months and third quarter of both years. The impact of catastrophes accounted for 5.7 percentage points of the combined ratio for the multiple peril class in the first nine months of 2015 and 1.1 percentage points in the third quarter compared with 5.9 and 3.2 percentage points, respectively, in the same periods of 2014.

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Casualty results were profitable in the first nine months and third quarter of 2015 and 2014, but more so in the 2015 periods. The 4.1 percentage point decrease in the combined ratio in the first nine months of 2015 compared with the same period of 2014 was due to more profitable results in the primary liability and excess liability components of this business. The 10.8 percentage point decrease in the combined ratio in the third quarter of 2015 compared with the same period of 2014 was driven by more profitable results in the excess liability component and, to a lesser extent, the primary liability component of this business. Results for the primary liability component were profitable in the first nine months of 2015 compared with the slightly profitable results in the same period of 2014. Results for this component were also profitable in the third quarter of 2015 compared with near breakeven results in the same period of 2014. Results for the excess liability component were highly profitable in the first nine months and third quarter of 2015 and 2014, but more so in the 2015 periods. Excess liability results in all periods benefited from substantial favorable prior year loss development driven mainly by lower than expected claim severity. Results for the automobile component were breakeven in the first nine months of 2015 and 2014. Results for this component were also breakeven in the third quarter of 2015 compared with modestly profitable results in the same period of 2014. Casualty results were adversely affected by incurred losses related to asbestos and toxic waste claims in the first nine months and third quarter of 2015 and 2014. Our analysis of these exposures resulted in an increase in the estimate of our ultimate liabilities. Such losses represented 4.1 percentage points of the combined ratio for our casualty business in the first nine months of 2015 and 7.4 percentage points in the third quarter compared with 2.9 and 5.9 percentage points, respectively, in the same periods of 2014.

Workers’ compensation results were profitable in the first nine months and third quarter of 2015 and 2014, but more so in the 2014 periods. The 3.2 percentage point increase in the combined ratio in the first nine months of 2015 compared with the same period of 2014 was due to a lower amount of favorable prior year loss development and a slightly higher current accident year loss ratio. The 3.1 percentage point increase in the combined ratio in the third quarter of 2015 compared with the same period of 2014 was also due to a lower amount of favorable prior year loss development and a slightly higher current accident year loss ratio. Results in all periods reflected our disciplined risk selection during the past several years.

Property and marine results were profitable in the first nine months of 2015 and 2014, but more so in 2015. Results were profitable in the third quarter of both years, but slightly more so in 2014. The 6.6 percentage point decrease in the combined ratio in the first nine months of 2015 compared with the same period of 2014 was due to a lower impact of catastrophes and, to a lesser extent, a lower current accident year loss ratio excluding catastrophes. The 1.2 percentage point increase in the combined ratio in the third quarter of 2015 compared to the same period of 2014 was due to a modest amount of unfavorable prior year loss development and a modestly higher current accident year loss ratio excluding catastrophes, offset in part by a lower impact of catastrophes. The impact of catastrophes accounted for 5.7 percentage points of the combined ratio in the first nine months of 2015 and 1.3 percentage points in the third quarter compared with 11.4 and 6.6 percentage points, respectively, in the same periods of 2014.

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Specialty Insurance

Net premiums written in our specialty insurance segment, which represented 20% of our total net premiums written in the first nine months of 2015, decreased by 1% in the first nine months of 2015 and 3% in the third quarter compared with the same periods of 2014. Net premiums written for the classes of business within the specialty insurance segment were as follows:

	Nine Months Ended September 30				% Incr. (Decr.)			Quarter Ended September 30				% Incr. (Decr.)
	2015		2014					2015		2014
	(in millions)							(in millions)
Professional liability	$	1,724	$	1,753		(2	)%	$	606	$	629		(4	)%
Surety		234		227		3			75		72		4
Total specialty	$	1,958	$	1,980		(1	)	$	681	$	701		(3	)

The decrease in net premiums written in our specialty insurance segment in the first nine months and third quarter of 2015 compared with the same periods of 2014 reflected the negative effect of foreign currency translation. Excluding the effect of foreign currency translation, net premiums written increased by 2% in the first nine months of 2015 and were flat in the third quarter.

The decrease in net premiums written for our professional liability business in the first nine months and third quarter of 2015 was driven in large part by a decline in net premiums written outside the United States in both periods compared with the same periods of 2014, due to the negative effect of foreign currency translation. Net premiums written in the United States were modestly higher in the first nine months of 2015 and slightly lower in the third quarter compared with the same periods of 2014. Overall premium growth in our professional liability business continued to reflect our focus on profitability in the pricing of renewal policies and new business, in what remains a competitive marketplace. Retention levels for this business remained strong. Such levels were slightly higher in the first nine months of 2015 compared with those in the same period of 2014, both inside and outside the United States. Retention levels were flat inside the United States and down slightly outside the United States in the third quarter of 2015 compared with those in the same period of 2014. New business increased in the United States, but decreased outside the United States, in the first nine months and third quarter of 2015 compared with the same periods of 2014. Average renewal rates in the United States for our professional liability business were up modestly in the first nine months of 2015 and up slightly in the third quarter compared with expiring rates, with increases occurring in most classes of this business. Average renewal rates outside the United States were flat in the first nine months of 2015 and down slightly in the third quarter compared with expiring rates. On average, the amounts of insured exposures upon renewal were up slightly in the United States and flat outside the United States in the first nine months and third quarter of 2015.

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The increase in net premiums written for our surety business in the first nine months of 2015 compared with the same period of 2014 was driven primarily by an increase in premiums written in the United States. Net premiums written outside the United States for our surety business also increased in the first nine months of 2015, but only slightly. In the third quarter of 2015, the increase in net premiums written for our surety business was driven by growth in the United States, offset in part by a decrease in premiums written outside the United States. Growth in net premiums written outside the United States in both periods of 2015 reflected the negative effect of foreign currency translation. Premiums written in our surety business depend significantly on the extent to which our existing customers are awarded contracts to perform services. As a result, premium growth in our surety business can often vary from period to period.

Our specialty insurance segment produced profitable underwriting results in the first nine months and third quarter of 2015 and 2014, but more so in the 2015 periods. The combined loss and expense ratios for the classes of business within the specialty insurance segment were as follows:

	Periods Ended September 30
	Nine Months						Third Quarter
	2015			2014			2015			2014
Professional liability		81.3	%		82.9	%		78.1	%		81.3	%
Surety		46.8			73.3			52.1			54.8
Total specialty		77.2			81.8			74.8			78.3

The 4.6 percentage point decrease in the combined loss and expense ratio for our specialty insurance segment in the first nine months of 2015 compared with the same period of 2014 was driven by improved results for our surety business and, to a lesser extent, improved results for our professional liability business. The 3.5 percentage point decrease in the combined loss and expense ratio for our specialty insurance segment in the third quarter of 2015 was driven by improved results in both our professional liability and surety businesses.

Professional liability results were profitable in the first nine months and third quarter of 2015 and 2014, but more so in the 2015 periods. The 1.6 percentage point decrease in the combined ratio for this business in the first nine months of 2015 compared with the same period of 2014 was due to improved current accident year results. The 3.2 percentage point decrease in the combined ratio for this business in the third quarter of 2015 compared with the same period of 2014 was due to improved current accident year results and, to a lesser extent, a higher amount of favorable prior year loss development.

Results for the directors and officers liability class were highly profitable in the first nine months of 2015 and 2014, but more so in 2014. Results for this class were also highly profitable in the third quarter of both years. Results for the directors and officers liability class reflected favorable prior year loss development in the first nine months of 2015 and 2014, but more so in 2014. Results for this class reflected a similar amount of favorable prior year loss development in the third quarter of both years.

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Results for the fiduciary liability class were also highly profitable in the first nine months and third quarter of 2015 and 2014, with results in all periods reflecting favorable prior year loss development. Results for the fidelity class were highly profitable in the first nine months and third quarter of 2015 compared with profitable results in the same periods of 2014. Results for this class reflected favorable prior year loss development in the first nine months of 2015 compared with unfavorable prior year loss development in the same period of 2014. Results for the employment practices liability class were slightly unprofitable in the first nine months of 2015 and modestly profitable in the third quarter compared with modestly unprofitable results in the same periods of 2014. Results for the errors and omissions liability class were profitable in the first nine months of 2015 compared with modestly unprofitable results in the same period of 2014. Results for this class reflected favorable prior year loss development in the first nine months of 2015 compared with unfavorable prior year loss development in the same period of 2014. Results for this class were similarly profitable in the third quarter of both years, reflecting favorable prior year loss development.

Surety results were profitable in the first nine months of 2015 and 2014, but more so in 2015. Such results were also profitable in the third quarter of both years. The combined ratio was 26.5 and 2.7 percentage points lower in the first nine months and third quarter of 2015, respectively, compared with the same periods of 2014. The significantly higher combined ratio in the first nine months of 2014 was due to one large loss in the first quarter outside the United States. Our surety business tends to be characterized by losses that are infrequent but have the potential to be highly severe.

Reinsurance Assumed

Net premiums written in our runoff reinsurance assumed business were not significant in the first nine months and third quarter of 2015 or 2014. Results for this business were profitable in the first nine months and third quarter of 2015 compared with breakeven results in the same periods of 2014. Results in the 2015 periods benefited from favorable prior year loss development.

Catastrophe Risk Management

Our property and casualty insurance subsidiaries have exposure to losses caused by natural perils such as hurricanes and other windstorms, earthquakes, severe winter weather and brush fires as well as from man-made catastrophic events such as terrorism. The frequency and severity of catastrophes are inherently unpredictable.

The extent of losses from a catastrophe is a function of both the total amount of insured exposure in an area affected by the event and the severity of the event. We regularly assess our concentrations of risk in catastrophe exposed areas globally and have strategies and underwriting standards to manage these exposures through individual risk selection, subject to regulatory constraints, and through the purchase of catastrophe reinsurance coverage. We use catastrophe modeling and a risk concentration management tool to monitor and control our accumulations of potential losses in catastrophe exposed areas in the United States, such as California and the gulf and east coasts, as well as

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in catastrophe exposed areas in other countries. The information provided by the catastrophe modeling and the risk concentration management tool has resulted in our non-renewing or reducing our exposure on some accounts and refraining from writing others.

Catastrophe modeling generally relies on multiple inputs based on experience, science, engineering and history, and the selection of those inputs requires a significant amount of judgment. Also, the modeling results may fail to account for risks that are outside the range of normal probability or are otherwise unforeseen. Because of this, actual results may differ materially from those derived from our modeling exercises.

We also continue to assess how changes in catastrophe risk, including the potential impact of global climate change, may affect our ability to manage our exposure under the insurance policies we issue, as well as how laws and regulations intended to combat climate change may affect us.

Despite our efforts to manage our catastrophe exposure, the occurrence of one or more severe catastrophic events could have a material effect on the Corporation’s results of operations, financial condition or liquidity.

Loss Reserves

Unpaid losses and loss expenses, also referred to as loss reserves, are the largest liability of our property and casualty insurance subsidiaries.

Our loss reserves include case estimates for claims that have been reported and estimates for claims that have been incurred but not reported at the balance sheet date as well as estimates of the expenses associated with processing and settling all reported and unreported claims, less estimates of anticipated salvage and subrogation recoveries. Estimates are based upon past loss experience modified for current trends as well as prevailing economic, legal and social conditions. Our loss reserves are not discounted to present value.

We regularly review our loss reserves using a variety of actuarial techniques. We update the reserve estimates as historical loss experience develops, additional claims are reported and/or settled and new information becomes available. Any changes in estimates are reflected in operating results in the period in which the estimates are changed.

Incurred but not reported (IBNR) reserve estimates are generally calculated by first projecting the ultimate cost of all claims that have occurred and then subtracting reported losses and loss expenses. Reported losses include cumulative paid losses and loss expenses plus case reserves. The IBNR reserve includes a provision for claims that have occurred but have not yet been reported to us, some of which are not yet known to the insured, as well as a provision for future development on reported claims. A relatively large proportion of our net loss reserves, particularly for long tail liability classes, are reserves for IBNR losses. In fact, about 75% of our aggregate net loss reserves at September 30, 2015 were for IBNR losses.

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Our gross case and IBNR loss reserves and related reinsurance recoverable by class of business were as follows:

	Gross Loss Reserves						Reinsurance		Net Loss
September 30, 2015	Case		IBNR		Total		Recoverable		Reserves
	(in millions)
Personal insurance
Automobile	$	258	$	147	$	405	$	12	$	393
Homeowners		487		359		846		26		820
Other		306		742		1,048		66		982
Total personal		1,051		1,248		2,299		104		2,195
Commercial insurance
Multiple peril		574		1,175		1,749		31		1,718
Casualty		1,332		5,516		6,848		419		6,429
Workers’ compensation		1,218		2,158		3,376		289		3,087
Property and marine		759		443		1,202		311		891
Total commercial		3,883		9,292		13,175		1,050		12,125
Specialty insurance
Professional liability		1,131		5,323		6,454		241		6,213
Surety		16		67		83		5		78
Total specialty		1,147		5,390		6,537		246		6,291
Total insurance		6,081		15,930		22,011		1,400		20,611
Reinsurance assumed		115		233		348		105		243
Total	$	6,196	$	16,163	$	22,359	$	1,505	$	20,854
	Gross Loss Reserves						Reinsurance		Net Loss
December 31, 2014	Case		IBNR		Total		Recoverable		Reserves
	(in millions)
Personal insurance
Automobile	$	260	$	151	$	411	$	14	$	397
Homeowners		438		353		791		43		748
Other		331		739		1,070		70		1,000
Total personal		1,029		1,243		2,272		127		2,145
Commercial insurance
Multiple peril		596		1,194		1,790		40		1,750
Casualty		1,412		5,514		6,926		412		6,514
Workers’ compensation		1,116		2,091		3,207		289		2,918
Property and marine		773		465		1,238		355		883
Total commercial		3,897		9,264		13,161		1,096		12,065
Specialty insurance
Professional liability		1,180		5,587		6,767		287		6,480
Surety		18		62		80		5		75
Total specialty		1,198		5,649		6,847		292		6,555
Total insurance		6,124		16,156		22,280		1,515		20,765
Reinsurance assumed		145		253		398		124		274
Total	$	6,269	$	16,409	$	22,678	$	1,639	$	21,039

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Loss reserves, net of reinsurance recoverable, decreased by $185 million during the first nine months of 2015. The decrease in loss reserves during the first nine months of 2015 included a decrease of $361 million related to the effect of foreign currency translation, due to a stronger U.S. dollar relative to the currencies in which our loss reserves were held at September 30, 2015 compared with December 31, 2014. The decrease in loss reserves also reflected an increase of $34 million related to catastrophe losses. Loss reserves related to our insurance business decreased by $154 million and loss reserves related to our runoff reinsurance assumed business decreased by $31 million.

The increase in gross loss reserves in the homeowners class during the first nine months of 2015 was driven primarily by catastrophe losses. The decrease in gross loss reserves in the casualty classes was mainly driven by the effect of foreign currency translation. The increase in gross loss reserves in the workers’ compensation class was driven mainly by increased exposures. The decrease in gross loss reserves in the professional liability classes reflected the effect of foreign currency translation, as well as payment activity and favorable prior year loss development.

In establishing the loss reserves of our property and casualty insurance subsidiaries, we consider facts currently known and the present state of the law and coverage litigation. Based on all information currently available, we believe that the aggregate net loss reserves at September 30, 2015 were adequate to cover claims for losses that had occurred as of that date, including both those known to us and those yet to be reported. However, as discussed in Item 7 of our Annual Report on Form 10-K for the year ended December 31, 2014, there are significant uncertainties inherent in the loss reserving process. It is therefore possible that management’s estimate of the ultimate liability for losses that had occurred as of September 30, 2015 may change, which could have a material effect on the Corporation’s results of operations and financial condition.

Changes in loss reserve estimates are unavoidable because such estimates are subject to the outcome of future events. Loss trends vary and time is required for changes in trends to be recognized and confirmed. Reserve changes that increase previous estimates of ultimate cost are referred to as unfavorable or adverse development or reserve strengthening. Reserve changes that decrease previous estimates of ultimate cost are referred to as favorable development or reserve releases.

We estimate that we experienced overall favorable development of about $475 million in the first nine months of 2015 and $180 million in the third quarter compared with favorable development of about $480 million and $155 million, respectively, in the same periods of 2014, on net loss reserves established as of the respective prior year end.

The favorable development in the first nine months of 2015 was primarily in the professional liability and commercial liability classes due to favorable loss experience related to accident years 2013 and prior. The favorable development in the first nine months of 2014 was primarily in the professional liability classes due to favorable loss experience related mainly to accident years 2010 and prior, and in the commercial liability classes due to favorable loss experience related mainly to accident years 2008 through 2012.

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Investment Results

Our ability to grow our property and casualty investment income is a function of several variables, including investable cash flows, available reinvestment rates and foreign currency to U.S. dollar exchange rates. The property and casualty subsidiaries’ investable cash flows are impacted by many factors, including operating activities, the payment of dividends to Chubb and the timing of maturities, calls and redemptions of fixed maturities. Economic conditions and national monetary policies both inside and outside the United States have resulted in a low interest rate environment in recent years that is expected to continue to adversely affect our ability to increase our investment income.

Property and casualty investment income before taxes decreased by 5% in the first nine months and third quarter of 2015 compared with the same periods in 2014. The decrease was due primarily to a decline in the average yield of our property and casualty subsidiaries’ investment portfolio and, to a lesser extent, the impact of foreign currency translation, partially offset by the impact of an increase in our average invested assets. The decrease in the average yield on the investment portfolio primarily resulted from lower reinvestment yields on securities that we purchased to replace fixed maturities that matured, were redeemed by the issuer or were sold since the third quarter of 2014. While the property and casualty subsidiaries generated substantial operating cash flows in the last three months of 2014 and the first nine months of 2015, average invested assets were impacted by substantial dividend distributions made by the property and casualty subsidiaries to Chubb during 2014 and the first half of 2015. As a result of the dividend distributions, our property and casualty subsidiaries held only a slightly higher amount of average invested assets in the first nine months of 2015 and in the third quarter compared with the same periods in 2014.

The effective tax rate on our investment income was 17.6% in the first nine months of 2015 compared with 18.1% in the same period of 2014. The effective tax rate on our investment income is lower than the U.S. statutory tax rate since a portion of our investment income is tax exempt interest income. The effective tax rate fluctuates as the proportion of tax exempt investment income relative to total investment income changes from period to period.

On an after-tax basis, property and casualty investment income decreased by 5% in the first nine months and 6% in the third quarter of 2015 compared with the same periods in 2014. The after-tax annualized yield on our property and casualty subsidiaries’ investment portfolio was 2.63% and 2.76% in the first nine months of 2015 and 2014, respectively.

Other Income and Charges

Other income and charges, which includes miscellaneous income and expenses of the property and casualty subsidiaries, was not significant in the first nine months of 2015 and 2014.

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Corporate and Other

Corporate and other comprises investment income earned on corporate invested assets, interest expense and other expenses not allocated to our operating subsidiaries and the results of our non-insurance subsidiaries.

Corporate and other produced a loss before taxes of $209 million in the first nine months of 2015 compared with a loss of $177 million for the same period of 2014. The higher loss for the first nine months of 2015 compared with the same period of 2014 was due primarily to Merger-related professional fee expenses of approximately $22 million incurred in the second and third quarters of 2015. The Corporation expects to continue to incur expenses relating to the Merger in future periods, which may have a material effect on the results of operations of the Corporation for the relevant period.

Realized Investment Gains and Losses

Net realized investment gains and losses were as follows:

	Periods Ended September 30
	Nine Months						Third Quarter
	2015			2014			2015			2014
	(in millions)
Net realized gains
Fixed maturities	$	27		$	71		$	15		$	22
Equity securities		58			132			42			43
Other invested assets		77			153			51			45
		162			356			108			110
Other-than-temporary impairment losses
Fixed maturities		(12	)		(4	)		(11	)		—
Equity securities		(37	)		(1	)		(15	)		—
		(49	)		(5	)		(26	)		—
Realized investment gains before tax	$	113		$	351		$	82		$	110
Realized investment gains after tax	$	75		$	228		$	54		$	72

The net realized gains and losses of other invested assets primarily include the aggregate of realized gain distributions to us from the private equity limited partnerships in which we have an interest and changes in our equity in the net assets of those partnerships based on valuations provided to us by the manager of each partnership. Due to the timing of our receipt of valuation data from the investment managers, the value of these investments and any related realized gains and losses are generally reported on a one quarter lag.

The net realized gains of the limited partnerships reported in the first nine months of 2015 primarily reflected the positive performance of the U.S. equity markets in the first six months of 2015 and the fourth quarter of 2014 and the positive performance of the equity markets outside the United States in

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the second quarter of 2015. The net realized gains of the limited partnerships reported in the first nine months of 2014 primarily reflected the positive performance of the global equity and high yield investment markets in the first six months of 2014 and the fourth quarter of 2013.

We have not yet received third quarter 2015 valuations from many of the limited partnerships. Based on the limited preliminary information we have received to date about the third quarter performance of some of the limited partnerships and the weak performance in the global equity markets in the third quarter, we may experience an overall decline in our equity in the net assets of these limited partnership investments, which would be reflected in our fourth quarter 2015 net realized investment gains and losses.

We regularly review invested assets that have a fair value less than cost to determine if an other-than-temporary decline in value has occurred. We have a monitoring process overseen by a committee of investment and accounting professionals that is responsible for identifying those securities to be specifically evaluated for a potential other-than-temporary impairment.

The determination of whether a decline in value of any investment is temporary or other than temporary requires the judgment of management. The assessment of other-than-temporary impairment of fixed maturities and equity securities is based on both quantitative criteria and qualitative information. A number of factors are considered including, but not limited to, the length of time and the extent to which the fair value has been less than the cost, the financial condition and near term prospects of the issuer, whether the issuer is current on contractually obligated interest and principal payments, general market conditions and industry or sector specific factors. The decision to recognize a decline in the value of a security carried at fair value as other than temporary rather than temporary has no impact on shareholders’ equity.

In determining whether fixed maturities are other than temporarily impaired, we are required to recognize an other-than-temporary impairment loss when we conclude that we have the intent to sell or it is more likely than not that we will be required to sell an impaired fixed maturity before the security recovers to its amortized cost value or it is likely we will not recover the entire amortized cost value of an impaired security. If we have the intent to sell or it is more likely than not that we will be required to sell an impaired fixed maturity before the security recovers to its amortized cost value, the security is written down to fair value and the entire amount of the writedown is included in net income as a realized investment loss. For all other impaired fixed maturities, when the impairment is determined to be other than temporary, the impairment loss is separated into the amount representing the credit loss and the amount representing the loss related to all other factors. The amount of the impairment loss that represents the credit loss is included in net income as a realized investment loss and the amount of the impairment loss that relates to all other factors is included in other comprehensive income.

In determining whether equity securities are other than temporarily impaired, we consider our intent and ability to hold a security for a period of time sufficient to allow us to recover our cost. If a decline in the fair value of an equity security is deemed to be other than temporary, the security is written down to fair value and the amount of the writedown is included in net income as a realized investment loss.

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Capital Resources and Liquidity

Capital resources and liquidity represent a company’s overall financial strength and its ability to generate cash flows, borrow funds at competitive rates and raise new capital to meet operating and growth needs.

Capital Resources

Capital resources provide protection for policyholders, furnish the financial strength to support the business of underwriting insurance risks and facilitate continued business growth. At September 30, 2015, the Corporation had shareholders’ equity of $16.4 billion and total debt of $3.3 billion.

Management regularly monitors the Corporation’s capital resources. In connection with our long term capital strategy, from time to time Chubb may contribute capital to its property and casualty subsidiaries. In addition, in order to satisfy capital needs as a result of any rating agency capital adequacy or other future rating issues, or in the event we were to need additional capital to make strategic investments in light of market opportunities, we may take a variety of actions, which could include the issuance of additional debt and/or equity securities. We believe that our strong financial position and current debt level provide us with the flexibility and capacity to obtain funds externally through debt or equity financings on both a short term and long term basis. Pursuant to the Merger Agreement, Chubb, without the prior written consent of ACE, cannot take certain actions until the effective time of the Merger or termination of the Merger Agreement, including incurring any additional indebtedness, issuing equity, selling any material properties or assets, acquiring assets or making, or committing to make, capital expenditures, in each case except as permitted pursuant to the Merger Agreement.

In January 2014, the Chubb Board of Directors (the Board) authorized the repurchase of up to $1.5 billion of Chubb’s common stock. Repurchases under this authorization were completed in January 2015. On January 29, 2015, the Board authorized the repurchase of up to $1.3 billion of Chubb’s common stock. During the first six months of 2015, under these two authorizations we repurchased 6,046,623 shares of Chubb’s common stock in open market transactions at a cost of $604 million. During the second quarter of 2015, Chubb suspended repurchases of its common stock in connection with it agreeing to be acquired by ACE, which was announced on July 1, 2015. As of September 30, 2015, $749 million remained under the January 2015 authorization.

Ratings

Chubb and its property and casualty insurance subsidiaries are rated by major rating agencies. These ratings reflect the rating agency’s opinion of our financial strength, operating performance, strategic position and ability to meet our obligations to policyholders.

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Credit ratings assess a company’s ability to make timely payments of interest and principal on its debt. The following table presents Chubb’s credit ratings as determined by the major independent rating organizations as of November 4, 2015.

	A.M. Best	Standard & Poor’s	Moody’s	Fitch
Senior unsecured debt	aa	A	A2	A+
Junior subordinated capital securities	a+	BBB+	A3	A-
Commercial paper	AMB-1+	A-1	P-1	F1+

Since the announcement of the Merger, the four rating agencies revised either their credit rating of Chubb or their outlook on the credit rating. On July 1, 2015, Fitch placed the rating on “Rating Watch Negative.” On July 1, 2015, Standard & Poor’s placed the rating on “CreditWatch with negative implications” and then on October 26, 2015, subsequent to the announcements of Chubb and ACE satisfying certain closing conditions and ACE’s offering of $5.3 billion in senior unsecured notes to fund a portion of the Merger consideration, lowered the rating to A from A+ with an outlook of “negative.” On July 2, 2015, A.M. Best placed the rating “under review with negative implications.” On July 2, 2015, Moody’s affirmed the rating with a stable outlook but on October 27, 2015 placed the rating “On Review for Possible Downgrade” with an outlook of “Rating Under Review.”

Financial strength ratings assess an insurer’s ability to meet its financial obligations to policyholders. The following table presents our property and casualty subsidiaries’ financial strength ratings as determined by the major independent rating organizations as of November 4, 2015.

	A.M. Best		Standard & Poor’s		Moody’s		Fitch
Financial strength		A++		AA		Aa2		AA

Since the announcement of the Merger, Chubb’s property and casualty subsidiaries’ financial strength ratings were affirmed by the four rating agencies, with two revising their outlook. On July 1, 2015, Standard & Poor’s revised its outlook on the rating to “negative” and, on July 2, 2015, A.M. Best placed the rating “under review with negative implications.”

The rating agencies may take additional actions, which could be positive or negative, prior to or after the closing of the Merger.

Ratings are an important factor in establishing our competitive position in the insurance markets. There can be no assurance that our ratings will continue for any given period of time or that they will not be changed.

If our credit ratings were downgraded, we might incur higher borrowing costs and might have more limited means to access capital. A downgrade in our financial strength ratings could adversely affect the competitive position of our insurance operations, including a possible reduction in demand for our products in certain markets.

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Liquidity

Liquidity is a measure of a company’s ability to generate sufficient cash flows to meet the short and long term cash requirements of its business operations.

The Corporation’s liquidity requirements in the past have generally been met by funds from operations and we expect that funds from operations will continue to be sufficient to meet such requirements in the future. Liquidity requirements could also be met by funds received upon the maturity or sale of marketable securities in our investment portfolio. Chubb also has the ability to borrow under its $500 million credit facility and we believe we could issue debt or equity securities, subject, in each case, to obtaining ACE’s prior written consent as required under the terms of the Merger Agreement.

Our property and casualty operations provide liquidity in that insurance premiums are generally received months or even years before losses are paid under the policies purchased by such premiums. Cash receipts from operations, consisting of insurance premiums and investment income, provide funds to pay losses, operating expenses and dividends to Chubb. Cash receipts in excess of required cash outflows can be used to build the investment portfolio with the expectation of generating additional investment income in the future.

Our property and casualty subsidiaries maintain substantial investments in highly liquid, short term marketable securities. Accordingly, we do not anticipate selling long term fixed maturities to meet any liquidity needs.

Chubb’s liquidity requirements primarily include the payment of dividends to shareholders and interest and principal on debt obligations. The declaration and payment of dividends to Chubb’s shareholders is at the discretion of Chubb’s Board and depends upon many factors, including our operating results, financial condition, capital requirements and any regulatory constraints.

As a holding company, Chubb’s ability to continue to pay dividends to shareholders and to satisfy its debt obligations relies on the availability of liquid assets, which is dependent in large part on the dividend paying ability of its property and casualty subsidiaries. The timing and amount of dividends paid by the property and casualty subsidiaries to Chubb may vary from year to year. In the United States, our property and casualty subsidiaries are subject to laws and regulations in the jurisdictions in which they operate that restrict the amount and timing of dividends they may pay within twelve consecutive months without the prior approval of regulatory authorities. The restrictions are generally based on net income and on certain levels of policyholders’ surplus as determined in accordance with statutory accounting principles. Dividends in excess of such thresholds are considered “extraordinary” and require prior regulatory approval.

During the first nine months of 2015, the property and casualty subsidiaries paid dividends of $1,255 million to Chubb. As of September 30, 2015, the maximum aggregate dividend distribution that may be made by the subsidiaries to Chubb during the remainder of 2015 without prior regulatory approval was approximately $600 million.

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On October 21, 2015, a property and casualty subsidiary of Chubb declared a dividend to Chubb of $600 million to be paid on December 23, 2015, which is not considered extraordinary and, therefore, is not subject to regulatory approval.

Pursuant to the Merger Agreement, Chubb has agreed to use its reasonable best efforts to have available $3 billion in cash and cash equivalents prior to the effective time of the Merger. It is expected that, immediately after the effective time of the Merger, Chubb will pay to its shareholder after the Merger a dividend of $3 billion that will be used by ACE in connection with the funding of a portion of the cash consideration in the Merger. A portion of the $3 billion in cash and cash equivalents that may be held by Chubb prior to the effective time of the Merger will be from an extraordinary dividend to be paid to Chubb by a property and casualty subsidiary. Accordingly, on October 21, 2015, the property and casualty subsidiary declared a dividend to be paid to Chubb prior to the closing of the Merger, on such date after December 23, 2015 but on or prior to March 31, 2016, and in an amount to be determined at that time but not to exceed $1.4 billion. Since this dividend is considered extraordinary, it required regulatory approval, which has been received. Chubb expects that the balance of the $3 billion in cash and cash equivalents that may be held by Chubb prior to the effective time of the Merger will be cash and cash equivalents otherwise held by Chubb at that time.

The Corporation’s strong underwriting and investment results generated substantial positive operating cash flows of $1,957 million and $1,919 million in the first nine months of 2015 and 2014, respectively. The cash provided by operating activities increased $38 million in the first nine months of 2015 compared with the same period of 2014 primarily as a result of higher premium collections and lower loss payments, partially offset by higher tax payments.

Invested Assets

The main objectives in managing our investment portfolios are to maximize after-tax investment income and total investment return while managing credit risk and interest rate risk in order to ensure that funds will be available to meet our insurance and other obligations. Investment strategies are developed based on many factors including underwriting results and our resulting tax position, regulatory requirements, fluctuations in interest rates and consideration of other market risks. Investment decisions are centrally managed by investment professionals based on guidelines established by management and approved by the boards of directors of Chubb and its respective operating companies.

Our investment portfolio primarily comprises high quality bonds, principally tax exempt securities, corporate bonds, U.S. Treasury securities and mortgage-backed securities, as well as foreign government and corporate bonds that support our operations outside the United States. The portfolio also includes equity securities, primarily publicly traded common stocks, and other invested assets, primarily private equity limited partnerships, all of which are held with the primary objective of capital appreciation.

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Our objective is to achieve an appropriate mix of taxable and tax exempt securities in our portfolio to balance both investment and tax strategies. At September 30, 2015, 66% of our U.S. fixed maturity portfolio was invested in tax exempt securities. At September 30, 2015, about 75% of our tax exempt securities were rated Aa or better, with about 15% rated Aaa. The average rating of our tax exempt securities was Aa. While about 10% of our tax exempt securities were insured, the effect of insurance on the average credit rating of these securities was insignificant. The insured tax exempt securities in our portfolio have been selected based on the quality of the underlying credit and not the value of the credit insurance enhancement.

At September 30, 2015, 8% of our taxable fixed maturity portfolio was invested in U.S. government and government agency and authority obligations other than mortgage-backed securities and had an average rating of Aa. About 70% of the U.S. government and government agency and authority obligations other than mortgage-backed securities were U.S. Treasury securities with an average rating of Aaa and the remainder were taxable bonds issued by states, municipalities and political subdivisions within the United States with an average rating of Aa.

At September 30, 2015, 50% of our taxable fixed maturity portfolio consisted of corporate bonds that were issued by a diverse group of U.S. and foreign issuers and had an average rating of A. About 60% of our corporate bonds were issued by U.S. companies and about 40% were issued by foreign companies. At September 30, 2015, about 3% of our foreign corporate bonds were below investment grade.

At September 30, 2015, 36% of our taxable fixed maturity portfolio was invested in foreign government and government agency obligations, which had an average rating of Aa. The foreign government and government agency obligations consisted of high quality securities, primarily issued or guaranteed by national governments and, to a lesser extent, government agencies, regional governments and supranational organizations. The five largest foreign government and government agency issuers within our portfolio were Canada, the United Kingdom, Germany, Australia and Brazil, which collectively accounted for about 75% of our total foreign government and government agency obligations. Another 7% of our total foreign government and government agency obligations were issued by supranational organizations. At September 30, 2015, none of our foreign government and government agency obligations were below investment grade. We did not hold any foreign government or government agency obligations that have third party guarantees.

At September 30, 2015, 6% of our taxable fixed maturity portfolio was invested in mortgage-backed securities. About 95% of the mortgage-backed securities were rated Aaa. About half of the remaining 5% were below investment grade. Of the Aaa rated securities, 93% were call protected, commercial mortgage-backed securities (CMBS). All of our CMBS were senior securities with the highest level of credit support. The other 7% of the Aaa rated securities were residential mortgage-backed securities, consisting of government agency pass-through securities guaranteed by a government agency or a government sponsored enterprise and collateralized mortgage obligations backed by single family home mortgages.

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The net unrealized appreciation before tax of our fixed maturities and equity securities carried at fair value was $2.3 billion at September 30, 2015 compared with net unrealized appreciation before tax of $2.7 billion at December 31, 2014. Such unrealized appreciation is reflected in accumulated other comprehensive income, net of applicable deferred income taxes.

Fair Values of Financial Instruments

Fair values of financial instruments are determined by management using valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs. Fair values are generally measured using quoted prices in active markets for identical assets or liabilities or other inputs, such as quoted prices for similar assets or liabilities, that are observable, either directly or indirectly. In those instances where observable inputs are not available, fair values are measured using unobservable inputs for the asset or liability. Unobservable inputs reflect our own assumptions about the assumptions that market participants would use in pricing the asset or liability and are developed based on the best information available in the circumstances. Fair value estimates derived from unobservable inputs are affected by the assumptions used, including the discount rates and the estimated amounts and timing of future cash flows. The derived fair value estimates cannot be substantiated by comparison to independent markets and are not necessarily indicative of the amounts that would be realized in a current market exchange.

The fair value hierarchy prioritizes the inputs to valuation techniques used to measure fair value into three broad levels as follows:

Level 1 – Unadjusted quoted prices in active markets for identical financial instruments.

Level 2 – Other inputs that are observable for the financial instrument, either directly or indirectly.

Level 3 – Significant unobservable inputs.

The methods and assumptions used to estimate the fair values of financial instruments are as follows:

The carrying value of short term investments approximates fair value due to the short maturities of these investments.

Fair values of fixed maturities are determined by management, utilizing prices obtained from a third party, nationally recognized pricing service or, in the case of securities for which prices are not provided by a pricing service, from third party brokers. For fixed maturities that have quoted prices in active markets, market quotations are provided. For fixed maturities that do not trade on a daily basis, the pricing service and brokers provide fair value estimates using a variety of inputs including, but not limited to, benchmark yields, reported trades, broker/dealer quotes, issuer spreads, bids, offers, reference data, prepayment rates and measures of volatility. Management reviews on an ongoing basis the reasonableness of the methodologies used by the relevant pricing service and brokers. In addition, management, using the prices received

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for the securities from the pricing service and brokers, determines the aggregate portfolio price performance and reviews it against applicable indices. If management believes that significant discrepancies exist, it will discuss these with the relevant pricing service or broker to resolve the discrepancies.

Fair values of equity securities are determined by management, utilizing quoted market prices.

Fair values of long term debt issued by Chubb are determined by management, utilizing prices obtained from a third party, nationally recognized pricing service.

At September 30, 2015 and December 31, 2014, a pricing service provided fair value amounts for approximately 99% of our fixed maturities. The prices we obtain from a pricing service and brokers generally are non-binding, but are reflective of current market transactions in the applicable financial instruments.

At September 30, 2015 and December 31, 2014, we held an insignificant amount of financial instruments in our investment portfolio for which a lack of market liquidity impacted our determination of fair value.

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Item 3 — Quantitative and Qualitative Disclosures About Market Risk

For the Corporation’s disclosures about market risk, see Item 7A in Part II of Chubb’s Annual Report on Form 10-K for the year ended December 31, 2014. There have been no material changes to the Corporation’s disclosures about market risk in Item 7A of Chubb’s Annual Report on Form 10-K for the year ended December 31, 2014.

Item 4 — Controls and Procedures

As of September 30, 2015, an evaluation of the effectiveness of the design and operation of the Corporation’s disclosure controls and procedures (as such term is defined in Rule 13a-15(e) of the Securities Exchange Act of 1934) was performed under the supervision and with the participation of the Corporation’s management, including Chubb’s chief executive officer and chief financial officer. Based on that evaluation, the chief executive officer and chief financial officer concluded that the Corporation’s disclosure controls and procedures were effective as of September 30, 2015.

During the quarter ended September 30, 2015, there were no changes in internal control over financial reporting that have materially affected, or are reasonably likely to materially affect, the Corporation’s internal control over financial reporting.

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PART II. OTHER INFORMATION

Item 1 — Legal Proceedings

Chubb, the Board, ACE and/or Merger Sub were named as defendants in ten putative class actions brought by purported Chubb shareholders challenging the Merger in the New Jersey Superior Court, Somerset County, Chancery Division. The suits are captioned The Sadie Nauy Charitable Found. v. The Chubb Corp., et al., C-012040-15 (filed July 10, 2015); Anne Cutler v. John D. Finnegan, et al., C-012041-15 (filed July 10, 2015); Sidney Weiman v. The Chubb Corp., et al., C-012043-15 (filed July 14, 2015); Renee Sayegh v. The Chubb Corp., et al., C-012045-15 (filed July 10, 2015); Judy Mesirov v. The Chubb Corp., et al., C-012046-15 (filed July 20, 2015); Shiva Stein v. The Chubb Corp., et al., C-012047-15 (filed July 21, 2015); Vladimir Gusinsky Living Trust v. The Chubb Corp., et al., C-012048-15 (filed July 22, 2015); Jane Schwartzman v. Zoe Baird Budinger, et al., C-012049-15 (filed July 20, 2015); Saunders v. The Chubb Corp., et al., C-012050-15 (filed July 23, 2015); and Polatsch v. The Chubb Corp., et al., C-012051-15 (filed July 23, 2015) (collectively, the Actions). The complaints filed in the Actions allege, among other things, that the Board breached its fiduciary duties by agreeing to sell Chubb through an unfair and inadequate process and by failing to maximize the value of Chubb. Several of the complaints also allege that Chubb, ACE and/or Merger Sub have aided and abetted these breaches of fiduciary duties. The amended complaints filed in the Mesirov, Weiman and Schwartzman Actions added, among other things, allegations that the Registration Statement on Form S-4 filed by ACE on August 3, 2015 contained material misstatements and omissions. The plaintiffs seek as relief, among other things, an injunction against the Merger, rescission of the Merger to the extent it is already implemented, and an award of damages. Chubb believes the allegations made in the Actions are without merit.

On October 12, 2015, the defendants and the plaintiffs in the Actions entered into a Memorandum of Understanding (the MOU), which provides for the settlement of the Actions. Pursuant to the settlement contemplated by the terms of the MOU, Chubb filed a Current Report on Form 8-K on October 13, 2015 that included certain supplemental disclosures relating to the Merger.

The settlement contemplated by the MOU is subject to confirmatory discovery and customary conditions, including court approval. It is expected that a hearing will be scheduled at which the New Jersey Superior Court will consider the fairness, reasonableness and adequacy of the settlement. If the settlement is approved by the court, it will resolve and release all claims by shareholders of Chubb under New Jersey law challenging any aspect of the Merger, the Merger Agreement and any disclosure made in connection therewith, pursuant to terms that will be disclosed to shareholders prior to final approval of the settlement. There can be no assurance that the court will approve the settlement contemplated by the MOU. If the court does not approve the settlement, or if the settlement is otherwise disallowed, the proposed settlement as contemplated by the MOU may be terminated.

Chubb and its subsidiaries are defendants in various other lawsuits arising out of their businesses. It is the opinion of management that the final outcome of these matters will not materially affect the consolidated financial position of the registrant.

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Item 1A — Risk Factors

For additional discussion of the Corporation’s potential risks and uncertainties that could have a material adverse effect on our business, results of operations, profitability, financial condition, liquidity or cash flows and that could cause our operating results to vary significantly from period to period, see Item 1A in Part I of Chubb’s Annual Report on Form 10-K for the year ended December 31, 2014 and the section entitled Risk Factors in the definitive proxy materials relating to the Merger filed by Chubb on September 11, 2015. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial also could have a material adverse effect on our business, results of operations, profitability, financial condition, liquidity or cash flows.

We will be subject to business uncertainties while the Merger is pending, which could adversely affect our business.

Uncertainty about the effect of the Merger on our employees and customers may have an adverse effect on us. Additionally, the Merger is not expected to close until the first quarter of 2016 and may be delayed for any number of reasons, including those described in these Risk Factors. The length of time of the expected closing of the Merger and the uncertainties about the effect of the Merger on our employees and customers may impair our ability to attract, retain and motivate key personnel until the Merger is completed and for a period of time thereafter, and could cause customers and others that deal with us to seek to change their existing business relationships or cease doing business with us. Employee retention may be particularly challenging during the pendency of the Merger, as employees may experience uncertainty about their roles with ACE following the Merger and may become distracted as a result of such uncertainty.

In addition, the Merger Agreement restricts us from taking specified actions without the consent of ACE, and generally requires us to continue our operations in the ordinary course until completion of the Merger. These restrictions may prevent us from pursuing attractive business opportunities that may arise prior to the completion of the Merger or otherwise adversely affect our ability to do business.

We have incurred and will continue to incur transaction costs in connection with the Merger.

We have incurred and will continue to incur costs in connection with the negotiation and completion of the transactions contemplated by the Merger Agreement. Such costs include a portion of all filing fees paid to the Securities and Exchange Commission in connection with the Merger and the costs of printing and mailing a joint proxy statement/prospectus relating to special meetings at which ACE and Chubb shareholders voted on Merger-related matters. We expect to continue to incur a number of other nonrecurring costs associated with completing the Merger, including, among others, fees paid to financial, legal, accounting and other advisors, which we have and will continue to incur, and employee retention costs. These costs, as well as other unanticipated costs and expenses, could have an adverse effect on our financial condition and results of operations prior to the completion of the Merger.

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Regulatory approvals may not be received, may take longer than expected to be received or may impose conditions that are not presently anticipated or cannot be met.

Completion of the Merger is conditioned upon, among other things, the receipt of certain governmental approvals, including, without limitation, insurance regulatory approvals. Although each party has agreed to use respective reasonable best efforts to obtain the requisite governmental approvals, there can be no assurance that these approvals will be obtained and that the other conditions to completing the Merger will be satisfied. In addition, the governmental authorities from which the regulatory approvals are required may impose conditions on the completion of the Merger or require changes to the terms of the Merger or Merger Agreement. Such conditions or changes and the process of obtaining regulatory approvals could have the effect of delaying or impeding completion of the Merger.

Each party’s obligation to complete the Merger is subject to the condition that the required governmental approvals have been obtained without the imposition of a condition or restriction that would reasonably be likely to have a material and adverse effect on ACE and its subsidiaries, taken as a whole, giving effect to the Merger (with such materiality measured on a scale relative to the Corporation, taken as a whole). Therefore, the Merger may not be completed if a regulator were to seek to impose such a condition or restriction.

The Merger Agreement limits our ability to pursue alternatives to the Merger.

The Merger Agreement contains provisions that may discourage a third party from submitting an acquisition proposal to Chubb that might result in greater value to Chubb shareholders than the Merger, or may result in a potential competing acquirer proposing to pay a lower per share price to acquire us than it might otherwise have proposed to pay. These provisions include a general prohibition on Chubb from soliciting or, subject to certain exceptions relating to the exercise of fiduciary duties by the Board, entering into discussions with any third party regarding any acquisition proposal or offers for competing transactions. In addition, Chubb may be required to pay ACE a termination fee of $930 million in certain circumstances involving acquisition proposals for competing transactions.

Failure to complete the Merger could negatively impact the price of Chubb common stock, as well as our future business and financial results.

The Merger Agreement contains a number of conditions that must be satisfied or waived prior to the completion of the Merger. Those conditions include the receipt of all required regulatory approvals and expiration or termination of all statutory waiting periods in respect thereof, the accuracy of representations and warranties under the Merger Agreement (subject to the materiality standards set forth in the Merger Agreement) and each party’s performance of their respective obligations under the Merger Agreement in all material respects. There can be no assurance that all of the conditions to the Merger will be so satisfied or waived. If the conditions to the Merger are not satisfied or waived, ACE and Chubb will be unable to complete the Merger.

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If the Merger is not completed for any reason, the Corporation’s business and financial results may be adversely affected, including as follows:

• we may experience negative reactions from the financial markets, including negative impacts on the market price of Chubb common stock;

• the manner in which brokers, customers, insurers, cedants and other third parties perceive us may be negatively impacted, which in turn could affect our ability to compete for or write new business or obtain renewals in the marketplace;

• we may experience negative reactions from employees; and

• we will have expended time and resources that could otherwise have been spent on our existing business and the pursuit of other opportunities that could have been beneficial to our ongoing business and financial results may be adversely affected.

In addition to the above risks, if the Merger Agreement is terminated and/or the Board seeks an alternative transaction, Chubb’s shareholders cannot be certain that we will be able to find a party willing to engage in a transaction on more attractive terms than the Merger. If the Merger Agreement is terminated under certain circumstances, Chubb may be required to pay a termination fee of $930 million to ACE.

The Merger Agreement may be terminated in accordance with its terms and the Merger may not be completed.

The Merger Agreement is subject to a number of conditions that must be fulfilled in order to complete the Merger. These conditions to the closing of the Merger may not be fulfilled in a timely manner or at all, and, accordingly, the Merger may be delayed or may not be completed. In addition, if the Merger is not completed by June 30, 2016, either ACE or Chubb may choose not to proceed with the Merger, and the parties can mutually decide to terminate the Merger Agreement at any time. In addition, ACE and Chubb may elect to terminate the Merger Agreement in certain other circumstances and Chubb may be required to pay a termination fee.

Actions taken by rating agencies in response to the transactions contemplated by the Merger Agreement could adversely affect our cost of, and access to, capital and the competitive position of our insurance operations.

Credit ratings and financial strength ratings can be important factors in establishing our competitive position in the insurance markets. Since the announcement of the Merger, the rating agencies have taken various actions with respect to our debt ratings and our insurance company subsidiaries’ financial strength ratings. On October 26, 2015, subsequent to the announcements of Chubb and ACE satisfying certain closing conditions and ACE’s offering of $5.3 billion in senior unsecured notes to fund a portion of the Merger consideration, Standard & Poor’s (S&P) downgraded Chubb’s issuer credit rating to “A” from “A+.” In addition, although Moody’s, A.M. Best and Fitch have not downgraded our credit rating, A.M. Best and Fitch have each revised their outlook on the rating to negative and Moody’s has placed the rating under review for a possible

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downgrade. S&P and A.M. Best also have each revised its outlook on our insurance subsidiaries’ financial strength ratings to negative. There can be no assurance that our ratings will continue for any given period of time or that they will not be changed. The rating agencies may take additional actions, which may be positive or negative, prior to or after the closing of the Merger. As a result of the downgrade of our credit rating by S&P, and if our credit ratings were downgraded by the other rating agencies (or further downgraded by S&P), we could incur higher borrowing costs and may have more limited means to access capital. In addition, if the rating agencies were to downgrade our financial strength ratings, it could adversely affect the competitive position of our insurance operations, including a possible reduction in demand for our products in certain markets.

For additional information on our credit ratings and financial strength ratings, see Part I, Item 2 MD&A – Capital Resources and Liquidity - Ratings in this Form 10-Q and Part II, Item 7 MD&A – Capital Resources and Liquidity - Ratings in our Annual Report on Form 10-K for the year ended December 31, 2014.

Litigation relating to the Merger could require us to incur significant costs, as well as prevent and/or delay the Merger.

In connection with the Merger, purported Chubb shareholders have filed putative shareholder class action lawsuits in New Jersey Superior Court, Somerset County, Chancery Division, against Chubb, members of the Board, ACE and Merger Sub. Among other remedies, the plaintiffs seek to enjoin the Merger. On October 12, 2015, the defendants and the plaintiffs entered into a Memorandum of Understanding (the MOU), which provides for the settlement of the lawsuits. The settlement contemplated by the MOU is subject to confirmatory discovery and customary conditions, including court approval. It is expected that a hearing will be scheduled at which the New Jersey Superior Court will consider the fairness, reasonableness and adequacy of the settlement. If the settlement is approved by the court, it will resolve and release all claims by shareholders of Chubb under New Jersey law challenging any aspect of the Merger, the Merger Agreement, and any disclosure made in connection therewith, pursuant to terms that will be disclosed to shareholders prior to final approval of the settlement.

There can be no assurance that the court will approve the settlement contemplated by the MOU. If the court does not approve the settlement, or if the settlement is otherwise disallowed, the proposed settlement as contemplated by the MOU may be terminated. The outcome of such litigation therefore remains uncertain. If the cases are not resolved, these lawsuits could prevent or delay completion of the Merger and result in substantial costs to us and ACE, including any costs associated with the indemnification of directors and officers. Additional lawsuits may also be filed against Chubb, ACE and/or the directors and officers of either company in connection with the Merger. The defense or settlement of any lawsuit or claim that remains unresolved at the time the Merger is completed may adversely affect our business, financial condition, results of operations and cash flows. For additional information on litigation relating to the Merger and the MOU, see Part II, Item 1 Legal Proceedings in this Form 10-Q.

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Because the market price of ACE common shares may fluctuate, Chubb shareholders cannot be certain of the precise value of the stock portion of the Merger consideration they may receive in the Merger.

At the time the Merger is completed, each issued and outstanding share of Chubb common stock (except for certain shares held by ACE, Chubb or their subsidiaries) will be converted into the right to receive consideration in the form of a combination of ACE common shares and cash. Until the closing the market value of ACE common shares will fluctuate as a result of a variety of factors, including general market and economic conditions, changes in ACE’s businesses, operations and prospects and regulatory considerations. Many of these factors are outside the control of the Corporation and ACE. The actual value of the ACE common shares received by Chubb shareholders will depend on the market value of the ACE common shares at that time. This market value may differ, possibly materially, from the value used in setting the Merger consideration.

Item 2 – Unregistered Sales of Equity Securities and Use of Proceeds

On January 29, 2015, the Board authorized the repurchase of up to $1.3 billion of Chubb’s common stock. The January 29, 2015 authorization has no expiration date.

During the second quarter of 2015, Chubb suspended repurchases of its common stock in connection with its agreeing to be acquired by ACE, which was announced on July 1, 2015. During the third quarter of 2015, no shares of Chubb common stock were repurchased pursuant to the January 29, 2015 authorization. As of September 30, 2015, $749 million remained available under such authorization.

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Item 6 — Exhibits

Exhibit Number		Description
	-	Rule 13a-14(a)/15d-14(a) Certifications
31.1		Certification by John D. Finnegan filed herewith.
31.2		Certification by Richard G. Spiro filed herewith.
	-	Section 1350 Certifications
32.1		Certification by John D. Finnegan filed herewith.
32.2		Certification by Richard G. Spiro filed herewith.
	-	Interactive Data File
101.INS		XBRL Instance Document
101.SCH		XBRL Taxonomy Extension Schema Document
101.CAL		XBRL Taxonomy Extension Calculation Linkbase Document
101.LAB		XBRL Taxonomy Extension Label Linkbase Document
101.PRE		XBRL Taxonomy Extension Presentation Linkbase Document
101.DEF		XBRL Taxonomy Extension Definition Linkbase Document

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, The Chubb Corporation has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

THE CHUBB CORPORATION
(Registrant)
By:	/s/ John J. Kennedy
	John J. Kennedy
	Senior Vice President and
	Chief Accounting Officer

Date: November 6, 2015

EX-31.1

Exhibit 31.1

THE CHUBB CORPORATION

CERTIFICATION

I, John D. Finnegan, certify that:

1.    I have reviewed this quarterly report on Form 10-Q of The Chubb Corporation;

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(s) 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(s) 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: November 6, 2015

/s/    John D. Finnegan

John D. Finnegan

Chairman, President and Chief Executive Officer

EX-31.2

Exhibit 31.2

THE CHUBB CORPORATION

CERTIFICATION

I, Richard G. Spiro, certify that:

1.    I have reviewed this quarterly report on Form 10-Q of The Chubb Corporation;

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(s) 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(s) 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: November 6, 2015

/s/    Richard G. Spiro

Richard G. Spiro

Executive Vice President and Chief Financial Officer

EX-32.1

Exhibit 32.1

THE CHUBB CORPORATION

CERTIFICATION OF PERIODIC REPORT

I, John D. Finnegan, Chairman, President and Chief Executive Officer of The Chubb Corporation (the “Corporation”), certify, pursuant to 18 U.S.C. Section 1350 adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) the Quarterly Report on Form 10-Q of the Corporation for the quarterly period ended September 30, 2015 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Corporation.

Dated: November 6, 2015

/s/    John D. Finnegan

John D. Finnegan

Chairman, President and Chief Executive Officer

EX-32.2

Exhibit 32.2

THE CHUBB CORPORATION

CERTIFICATION OF PERIODIC REPORT

I, Richard G. Spiro, Executive Vice President and Chief Financial Officer of The Chubb Corporation (the “Corporation”), certify, pursuant to 18 U.S.C. Section 1350 adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) the Quarterly Report on Form 10-Q of the Corporation for the quarterly period ended September 30, 2015 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Corporation.

Dated: November 6, 2015

/s/    Richard G. Spiro

Richard G. Spiro

Executive Vice President and Chief Financial Officer

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Segments Information - Revenues and Income Before Income Tax of Each Operating Segment (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues
Premiums earned related to insurance business	$ 3,166	$ 3,119	$ 9,405	$ 9,211
Premiums earned related to reinsurance assumed			(1)	1
Net Premiums earned	3,166	3,119	9,404	9,212
Investment Income	328	344	1,001	1,053
Corporate and other	8	7	25	25
Realized investment gains, net	82	110	113	351
Total Revenues	3,578	3,574	10,524	10,622
Insurance underwriting income (loss)	522	425	1,107	876
Reinsurance assumed underwriting income	4		7	1
Underwriting income before deferred policy acquisition costs	526	425	1,114	877
Increase (decrease) in deferred policy acquisition costs	(1)	14	44	48
Underwriting income	525	439	1,158	925
Total property and casualty insurance	831	766	2,103	1,925
Corporate and other	(66)	(58)	(209)	(177)
Realized investment gains, net	82	110	113	351
Income Before Federal and Foreign Income Tax	847	818	2,007	2,099
Personal Insurance [Member]
Revenues
Premiums earned related to insurance business	1,114	1,118	3,364	3,296
Insurance underwriting income (loss)	154	141	213	188
Commercial Insurance [Member]
Revenues
Premiums earned related to insurance business	1,390	1,338	4,077	3,943
Insurance underwriting income (loss)	207	151	446	333
Specialty Insurance [Member]
Revenues
Premiums earned related to insurance business	662	663	1,964	1,972
Insurance underwriting income (loss)	161	133	448	355
Property and Casualty Insurance [Member]
Revenues
Investment Income	322	338	982	1,034
Total Revenues	3,488	3,457	10,386	10,246
Investment income	310	$ 327	949	1,004
Other charges	$ (4)		$ (4)	$ (4)

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Invested Assets - Fair Value and Amortized Cost of Fixed Maturities by Contractual Maturity (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Schedule of Available-For-Sale Securities [Line Items]
Due in one year or less, Fair Value	$ 2,193
Due after one year through five years, Fair Value	11,621
Due after five years through ten years, Fair Value	13,722
Due after ten years, Fair Value	8,395
Subtotal fixed maturities, Fair Value	35,931
Total fixed maturities, Fair Value	37,016	$ 38,780
Due in one year or less, Amortized Cost	2,174
Due after one year through five years, Amortized Cost	11,173
Due after five years through ten years, Amortized Cost	13,032
Due after ten years, Amortized Cost	8,037
Subtotal fixed maturities, Amortized Cost	34,416
Fixed maturities, Amortized Cost	35,469	$ 36,958
Residential Mortgage-backed Securities [Member]
Schedule of Available-For-Sale Securities [Line Items]
Taxable, Fair Value	124
Taxable, Amortized Cost	110
Commercial Mortgage-backed Securities [Member]
Schedule of Available-For-Sale Securities [Line Items]
Taxable, Fair Value	961
Taxable, Amortized Cost	$ 943

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Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Basic earnings per share:
Net Income	$ 601	$ 594	$ 1,470	$ 1,542
Weighted average shares outstanding	229.4	240.2	231.2	244.8
Basic earnings per share	$ 2.62	$ 2.47	$ 6.36	$ 6.30
Diluted earnings per share:
Net Income	$ 601	$ 594	$ 1,470	$ 1,542
Weighted average shares outstanding	229.4	240.2	231.2	244.8
Additional shares from assumed issuance of shares under stock-based compensation awards	1.7	0.4	0.9	0.6
Weighted average shares and potential shares assumed outstanding for computing diluted earnings per share	231.1	240.6	232.1	245.4
Diluted earnings per share	$ 2.60	$ 2.47	$ 6.33	$ 6.28

XML

General

9 Months Ended

Sep. 30, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

General

1) General

The accompanying condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (GAAP) and include the accounts of The Chubb Corporation (Chubb) and its subsidiaries (collectively, the Corporation). Significant intercompany transactions have been eliminated in consolidation.

The amounts included in this report are unaudited but include those adjustments, consisting of normal recurring items, that management considers necessary for a fair presentation. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes in the Notes to Consolidated Financial Statements included in Chubb’s Annual Report on Form 10-K for the year ended December 31, 2014.

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Invested Assets - Change in Unrealized Appreciation or Depreciation of Investments Carried at Fair Value (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Investments, Debt and Equity Securities [Abstract]
Change in unrealized appreciation of fixed maturities	$ 134	$ 2	$ (275)	$ 619
Change in unrealized appreciation of equity securities	(163)	(73)	(164)	37
Net unrealized gains (losses) recognized in other comprehensive income or loss, Before Tax	(29)	(71)	(439)	656
Deferred income tax (credit)	(10)	(25)	(154)	229
Net unrealized gains (losses) recognized in other comprehensive income or loss, Net of Tax	$ (19)	$ (46)	$ (285)	$ 427

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Invested Assets - Additional Information (Detail) $ in Millions	Sep. 30, 2015 USD ($) Investment	Dec. 31, 2014 USD ($)
Investments, Debt and Equity Securities [Abstract]
Approximate number of individual fixed maturities in unrealized loss position	1,125
Approximate number of individual equity securities in unrealized loss position	25
Cumulative credit-related losses recognized in net income | $	$ 16	$ 18

XML

Invested Assets - Realized Investment Gains and Losses (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net Investment Income [Line Items]
Other-than-temporary impairment losses	$ (26)		$ (49)	$ (5)
Total fixed maturities	4	$ 22	15	67
Total equity securities	27	43	21	131
Other invested assets	51	45	77	153
Total Realized Investment Gains, Net	82	110	113	351
Fixed Maturities [Member]
Net Investment Income [Line Items]
Gross realized gains	20	27	50	104
Gross realized losses	(5)	(5)	(23)	(33)
Other-than-temporary impairment losses	(11)		(12)	(4)
Equity Securities [Member]
Net Investment Income [Line Items]
Gross realized gains	42	$ 43	58	132
Other-than-temporary impairment losses	$ (15)		$ (37)	$ (1)

XML

Comprehensive Income - Components of Other Comprehensive Income or Loss (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net unrealized holding gains (losses) arising during the period, Before Tax	$ 2	$ (6)	$ (403)	$ 854
Reclassification adjustment for net realized gains included in net income, Before Tax	31	65	36	198
Net unrealized gains (losses) recognized in other comprehensive income or loss, Before Tax	(29)	(71)	(439)	656
Postretirement benefit gain not yet recognized in net income arising during the period, Before Tax	2	1	7	1
Reclassification adjustment for the amortization of net actuarial loss and prior service cost included in net income, Before Tax	(15)	(9)	(47)	(26)
Net change in postretirement benefit costs not yet recognized in net income, Before Tax	17	10	54	27
Foreign currency translation losses, Before Tax	(58)	(40)	(305)	(62)
Total other comprehensive income (loss), Before Tax	(70)	(101)	(690)	621
Net unrealized holding gains (losses) arising during the period, Income Tax	1	(3)	(141)	298
Reclassification adjustment for net realized gains included in net income, Income Tax	11	22	13	69
Net unrealized gains (losses) recognized in other comprehensive income or loss, Income Tax	(10)	(25)	(154)	229
Postretirement benefit gain not yet recognized in net income arising during the period, Income Tax			2
Reclassification adjustment for the amortization of net actuarial loss and prior service cost included in net income, Income Tax	(6)	(4)	(17)	(10)
Net change in postretirement benefit costs not yet recognized in net income, Income Tax	6	4	19	10
Foreign currency translation losses, Income Tax	(20)	(14)	(106)	(21)
Total other comprehensive income (loss), Income Tax	(24)	(35)	(241)	218
Net unrealized holding gains (losses) arising during the period, Net of Tax	1	(3)	(262)	556
Reclassification adjustment for net realized gains included in net income, Net of Tax	20	43	23	129
Net unrealized gains (losses) recognized in other comprehensive income or loss, Net of Tax	(19)	(46)	(285)	427
Postretirement benefit gain not yet recognized in net income arising during the period, Net of Tax	2	1	5	1
Reclassification adjustment for the amortization of net actuarial loss and prior service cost included in net income, Net of Tax	(9)	(5)	(30)	(16)
Net change in postretirement benefit costs not yet recognized in net income, Net of Tax	11	6	35	17
Foreign currency translation losses, Net of Tax	(38)	(26)	(199)	(41)
Total Other Comprehensive Income (Loss) Net of Tax	$ (46)	$ (66)	$ (449)	$ 403

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Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash Flows from Operating Activities
Net Income	$ 1,470	$ 1,542
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities
Increase in Unpaid Losses and Loss Expenses, Net	176	151
Increase in Unearned Premiums, Net	182	242
Change in Income Tax Payable or Recoverable	(45)	163
Deferred Income Tax	107	66
Amortization of Premiums and Discounts on Fixed Maturities	173	143
Depreciation	39	41
Realized Investment Gains, Net	(113)	(351)
Other, Net	(32)	(78)
Net Cash Provided by Operating Activities	1,957	1,919
Cash Flows from Investing Activities
Proceeds from Fixed Maturities - Sales	3,197	3,243
Proceeds from Fixed Maturities - Maturities, Calls and Redemptions	3,207	3,162
Proceeds from Sales of Equity Securities	94	199
Purchases of Fixed Maturities	(5,683)	(7,517)
Purchases of Equity Securities	(48)	(109)
Investments in Other Invested Assets, Net	74	189
Decrease (Increase) in Short Term Investments, Net	(1,757)	56
Change in Receivable or Payable from Security Transactions Not Settled, Net	14	457
Purchases of Property and Equipment, Net	(54)	(44)
Net Cash Used in Investing Activities	(956)	(364)
Cash Flows from Financing Activities
Decrease in Funds Held Under Deposit Contracts	(3)	(2)
Proceeds from Issuance of Common Stock Under Stock-Based Employee Compensation Plans	13	18
Repurchase of Shares	(624)	(1,210)
Dividends Paid to Shareholders	(381)	(356)
Net Cash Used in Financing Activities	(995)	(1,550)
Net Increase in Cash	6	5
Cash at Beginning of Year	47	52
Cash at End of Period	$ 53	$ 57

XML

Segments Information - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2015 Business_Unit Operations
Segment Reporting [Abstract]
Number of segment operations	2
Number of business units | Business_Unit	4

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Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues
Premiums Earned	$ 3,166	$ 3,119	$ 9,404	$ 9,212
Investment Income	328	344	1,001	1,053
Other Revenues	2	1	6	6
Realized Investment Gains (Losses), Net
Total Other-Than-Temporary Impairment Losses on Investments	(26)		(49)	(5)
Other Realized Investment Gains, Net	108	110	162	356
Total Realized Investment Gains, Net	82	110	113	351
Total Revenues	3,578	3,574	10,524	10,622
Losses and Expenses
Losses and Loss Expenses	1,633	1,679	5,260	5,316
Amortization of Deferred Policy Acquisition Costs	663	644	1,941	1,896
Other Insurance Operating Costs and Expenses	349	357	1,049	1,079
Investment Expenses	13	12	36	32
Other Expenses	4	4	10	14
Corporate Expenses	69	60	221	186
Total Losses and Expenses	2,731	2,756	8,517	8,523
Income Before Federal and Foreign Income Tax	847	818	2,007	2,099
Federal and Foreign Income Tax	246	224	537	557
Net Income	$ 601	$ 594	$ 1,470	$ 1,542
Net Income Per Share
Basic	$ 2.62	$ 2.47	$ 6.36	$ 6.30
Diluted	2.60	2.47	6.33	6.28
Dividends Declared Per Share	$ 0.57	$ 0.50	$ 1.71	$ 1.50

XML

Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions	Total	Common Stock [Member]	Paid-In-Surplus [Member]	Retained Earnings [Member]	Unrealized Appreciation of Investments Including Unrealized Other-Than-Temporary Impairment Losses [Member]	Postretirement Benefit Costs Not Yet Recognized in Net Income [Member]	Foreign Currency Translation Gains (Losses) [Member]	Accumulated Other Comprehensive Income [Member]	Treasury Stock, at Cost [Member]
Balance, Beginning of Year at Dec. 31, 2013			$ 171	$ 21,902	$ 1,225	$ (253)	$ 63		$ (7,383)
Net Income	$ 1,542			1,542
Repurchase of Shares									(1,209)
Changes Related to Stock-Based Employee Compensation (includes tax benefit of $4 and $16)			(20)
Change During Period, Net of Tax	403				427	17	(41)
Dividends Declared (per share $1.71 and $1.50)				(365)
Shares Issued Under Stock-Based Employee Compensation Plans									58
Balance, End of Period at Sep. 30, 2014	16,506	$ 372	151	23,079	1,652	(236)	22	$ 1,438	(8,534)
Balance, Beginning of Year at Dec. 31, 2014	16,296		171	23,520	1,753	(589)	(54)		(8,877)
Net Income	1,470			1,470
Repurchase of Shares									(604)
Changes Related to Stock-Based Employee Compensation (includes tax benefit of $4 and $16)			8
Change During Period, Net of Tax	(449)				(285)	35	(199)
Dividends Declared (per share $1.71 and $1.50)				(394)
Shares Issued Under Stock-Based Employee Compensation Plans									44
Balance, End of Period at Sep. 30, 2015	$ 16,371	$ 372	$ 179	$ 24,596	$ 1,468	$ (554)	$ (253)	$ 661	$ (9,437)

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Fair Values of Financial Instruments - Additional Information (Detail)	Sep. 30, 2015	Dec. 31, 2014
Debt Instrument Fair Value Carrying Value [Abstract]
Percentage of fair value amounts for fixed maturities provided by a pricing service	99.00%	99.00%

XML

Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share:

	Periods Ended September 30
	Third Quarter				Nine Months
	2015		2014		2015		2014
	(in millions, except for per share amounts)
Basic earnings per share:
Net income	$	601	$	594	$	1,470	$	1,542
Weighted average shares outstanding		229.4		240.2		231.2		244.8
Basic earnings per share	$	2.62	$	2.47	$	6.36	$	6.30
Diluted earnings per share:
Net income	$	601	$	594	$	1,470	$	1,542
Weighted average shares outstanding		229.4		240.2		231.2		244.8
Additional shares from assumed issuance of shares under stock-based compensation awards		1.7		.4		.9		.6
Weighted average shares and potential shares assumed outstanding for computing diluted earnings per share		231.1		240.6		232.1		245.4
Diluted earnings per share	$	2.60	$	2.47	$	6.33	$	6.28

XML

Fair Values of Financial Instruments - Fair Value of Financial Instruments Categorized Based Upon Lowest Level of Input (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short Term Investments	$ 3,052	$ 1,318
Fixed maturities, Fair Value	37,016	38,780
Equity securities	1,771	1,964
Long Term Debt	3,300	3,300
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short Term Investments	3,052	1,318
Fixed maturities, Fair Value	37,016	38,780
Equity securities	1,771	1,964
Total fixed maturities, equity securities and other invested assets, Fair Value	41,839	42,062
Long Term Debt	3,788	4,013
Tax Exempt [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, Fair Value	19,873	19,772
Tax Exempt [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, Fair Value	19,873	19,772
Taxable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, Fair Value	17,143	19,008
Taxable [Member] | U.S. Government and Government Agency and Authority Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, Fair Value	1,312	2,007
Taxable [Member] | Corporate Bonds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, Fair Value	8,624	9,028
Taxable [Member] | Foreign Government and Government Agency Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, Fair Value	6,122	6,672
Taxable [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, Fair Value	17,143	19,008
Taxable [Member] | Fair Value [Member] | U.S. Government and Government Agency and Authority Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, Fair Value	1,312	2,007
Taxable [Member] | Fair Value [Member] | Corporate Bonds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, Fair Value	8,624	9,028
Taxable [Member] | Fair Value [Member] | Foreign Government and Government Agency Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, Fair Value	6,122	6,672
Taxable [Member] | Fair Value [Member] | Residential Mortgage-backed Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, Fair Value	124	211
Taxable [Member] | Fair Value [Member] | Commercial Mortgage-backed Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, Fair Value	961	1,090
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short Term Investments	277	206
Equity securities	1,765	1,958
Total fixed maturities, equity securities and other invested assets, Fair Value	2,042	2,164
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short Term Investments	2,775	1,112
Fixed maturities, Fair Value	36,819	38,651
Total fixed maturities, equity securities and other invested assets, Fair Value	39,594	39,763
Long Term Debt	3,788	4,013
Level 2 [Member] | Tax Exempt [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, Fair Value	19,871	19,769
Level 2 [Member] | Taxable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, Fair Value	16,948	18,882
Level 2 [Member] | Taxable [Member] | U.S. Government and Government Agency and Authority Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, Fair Value	1,312	2,007
Level 2 [Member] | Taxable [Member] | Corporate Bonds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, Fair Value	8,431	8,912
Level 2 [Member] | Taxable [Member] | Foreign Government and Government Agency Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, Fair Value	6,122	6,663
Level 2 [Member] | Taxable [Member] | Residential Mortgage-backed Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, Fair Value	122	210
Level 2 [Member] | Taxable [Member] | Commercial Mortgage-backed Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, Fair Value	961	1,090
Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, Fair Value	197	129
Equity securities	6	6
Total fixed maturities, equity securities and other invested assets, Fair Value	203	135
Level 3 [Member] | Tax Exempt [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, Fair Value	2	3
Level 3 [Member] | Taxable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, Fair Value	195	126
Level 3 [Member] | Taxable [Member] | Corporate Bonds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, Fair Value	193	116
Level 3 [Member] | Taxable [Member] | Foreign Government and Government Agency Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, Fair Value		9
Level 3 [Member] | Taxable [Member] | Residential Mortgage-backed Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, Fair Value	$ 2	$ 1

XML

Invested Assets - Amortized Cost and Fair Value of Fixed Maturities and Equity Securities (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Investment Holdings [Line Items]
Fixed maturities, Amortized Cost	$ 35,469	$ 36,958
Fixed maturities, Gross Unrealized Appreciation	1,629	1,884
Fixed maturities, Gross Unrealized Depreciation	82	62
Fixed maturities, Fair Value	37,016	38,780
Equity securities, Amortized Cost	1,060	1,089
Equity securities, Gross Unrealized Appreciation	742	894
Equity securities, Gross Unrealized Depreciation	31	19
Equity securities, Fair Value	1,771	1,964
Tax Exempt [Member]
Investment Holdings [Line Items]
Fixed maturities, Amortized Cost	18,890	18,614
Fixed maturities, Gross Unrealized Appreciation	1,012	1,174
Fixed maturities, Gross Unrealized Depreciation	29	16
Fixed maturities, Fair Value	19,873	19,772
Taxable [Member]
Investment Holdings [Line Items]
Fixed maturities, Amortized Cost	16,579	18,344
Fixed maturities, Gross Unrealized Appreciation	617	710
Fixed maturities, Gross Unrealized Depreciation	53	46
Fixed maturities, Fair Value	17,143	19,008
Taxable [Member] | Residential Mortgage-backed Securities [Member]
Investment Holdings [Line Items]
Fixed maturities, Amortized Cost	110	192
Fixed maturities, Gross Unrealized Appreciation	15	20
Fixed maturities, Gross Unrealized Depreciation	1	1
Fixed maturities, Fair Value	124	211
Taxable [Member] | Commercial Mortgage-backed Securities [Member]
Investment Holdings [Line Items]
Fixed maturities, Amortized Cost	943	1,069
Fixed maturities, Gross Unrealized Appreciation	19	22
Fixed maturities, Gross Unrealized Depreciation	1	1
Fixed maturities, Fair Value	961	1,090
Taxable [Member] | U.S. Government and Government Agency and Authority Obligations [Member]
Investment Holdings [Line Items]
Fixed maturities, Amortized Cost	1,259	1,962
Fixed maturities, Gross Unrealized Appreciation	54	46
Fixed maturities, Gross Unrealized Depreciation	1	1
Fixed maturities, Fair Value	1,312	2,007
Taxable [Member] | Corporate Bonds [Member]
Investment Holdings [Line Items]
Fixed maturities, Amortized Cost	8,409	8,741
Fixed maturities, Gross Unrealized Appreciation	260	327
Fixed maturities, Gross Unrealized Depreciation	45	40
Fixed maturities, Fair Value	8,624	9,028
Taxable [Member] | Foreign Government and Government Agency Obligations [Member]
Investment Holdings [Line Items]
Fixed maturities, Amortized Cost	5,858	6,380
Fixed maturities, Gross Unrealized Appreciation	269	295
Fixed maturities, Gross Unrealized Depreciation	5	3
Fixed maturities, Fair Value	$ 6,122	$ 6,672

XML

Consolidated Statements of Shareholders' Equity (Parenthetical) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Dividends Declared Per Share	$ 1.71	$ 1.50
Paid-In-Surplus [Member]
Tax benefit, Stock-Based Employee Compensation	$ 4	$ 16
Retained Earnings [Member]
Dividends Declared Per Share	$ 1.71	$ 1.50

XML

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net Income	$ 601	$ 594	$ 1,470	$ 1,542
Other Comprehensive Income (Loss), Net of Tax
Change in Unrealized Appreciation of Investments	(19)	(46)	(285)	427
Change in Postretirement Benefit Costs Not Yet Recognized in Net Income	11	6	35	17
Foreign Currency Translation Losses	(38)	(26)	(199)	(41)
Total Other Comprehensive Income (Loss) Net of Tax	(46)	(66)	(449)	403
Comprehensive Income	$ 555	$ 528	$ 1,021	$ 1,945

XML

Accounting Pronouncements Not Yet Adopted (Policies)	9 Months Ended
	Sep. 30, 2015
Accounting Changes and Error Corrections [Abstract]
Accounting Pronouncements Not Yet Adopted	In February 2015, the Financial Accounting Standards Board issued updated guidance that amends certain aspects of the current consolidation accounting guidance. In particular, the new guidance modifies the evaluation of whether limited partnerships and similar legal entities are variable interest entities (VIEs) or voting interest entities and eliminates the presumption that a general partner should consolidate a limited partnership. The new guidance would be effective for the Corporation for the year beginning January 1, 2016. The Corporation is in the process of assessing the effect, if any, that the implementation of this guidance will have on its financial position and results of operations.

XML

Document and Entity Information	9 Months Ended
	Sep. 30, 2015 shares
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Trading Symbol	CB
Entity Registrant Name	CHUBB CORP
Entity Central Index Key	0000020171
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	227,055,872

XML

Invested Assets (Tables)

9 Months Ended

Sep. 30, 2015

Text Block [Abstract]

Amortized Cost and Fair Value of Fixed Maturities and Equity Securities

(a) The amortized cost and fair value of fixed maturities and equity securities were as follows:

	September 30, 2015
	Amortized Cost		Gross Unrealized Appreciation		Gross Unrealized Depreciation		Fair Value
	(in millions)
Fixed maturities
Tax exempt	$	18,890	$	1,012	$	29	$	19,873
Taxable
U.S. government and government agency and authority obligations		1,259		54		1		1,312
Corporate bonds		8,409		260		45		8,624
Foreign government and government agency obligations		5,858		269		5		6,122
Residential mortgage-backed securities		110		15		1		124
Commercial mortgage-backed securities		943		19		1		961
		16,579		617		53		17,143
Total fixed maturities	$	35,469	$	1,629	$	82	$	37,016
Equity securities	$	1,060	$	742	$	31	$	1,771

	December 31, 2014
	Amortized Cost		Gross Unrealized Appreciation		Gross Unrealized Depreciation		Fair Value
	(in millions)
Fixed maturities
Tax exempt	$	18,614	$	1,174	$	16	$	19,772
Taxable
U.S. government and government agency and authority obligations		1,962		46		1		2,007
Corporate bonds		8,741		327		40		9,028
Foreign government and government agency obligations		6,380		295		3		6,672
Residential mortgage-backed securities		192		20		1		211
Commercial mortgage-backed securities		1,069		22		1		1,090
		18,344		710		46		19,008
Total fixed maturities	$	36,958	$	1,884	$	62	$	38,780
Equity securities	$	1,089	$	894	$	19	$	1,964

Fair Value and Amortized Cost of Fixed Maturities by Contractual Maturity

The fair value and amortized cost of fixed maturities at September 30, 2015 by contractual maturity were as follows:

	Fair Value		Amortized Cost
	(in millions)
Due in one year or less	$	2,193	$	2,174
Due after one year through five years		11,621		11,173
Due after five years through ten years		13,722		13,032
Due after ten years		8,395		8,037
		35,931		34,416
Residential mortgage-backed securities		124		110
Commercial mortgage-backed securities		961		943
	$	37,016	$	35,469

Components of Unrealized Appreciation or Depreciation of Investments

(b) The components of unrealized appreciation or depreciation, including unrealized other-than-temporary impairment losses, of investments carried at fair value were as follows:

	September 30 2015		December 31 2014
	(in millions)
Fixed maturities
Gross unrealized appreciation	$	1,629	$	1,884
Gross unrealized depreciation		82		62
		1,547		1,822
Equity securities
Gross unrealized appreciation		742		894
Gross unrealized depreciation		31		19
		711		875
		2,258		2,697
Deferred income tax liability		790		944
	$	1,468	$	1,753

Fair Value and Gross Unrealized Depreciation of Investments in Unrealized Loss Position

The following table summarizes, for all investment securities in an unrealized loss position at September 30, 2015, the aggregate fair value and gross unrealized depreciation, including unrealized other-than-temporary impairment losses, by investment category and length of time that individual securities have continuously been in an unrealized loss position.

	Less Than 12 Months				12 Months or More				Total
	Fair Value		Gross Unrealized Depreciation		Fair Value		Gross Unrealized Depreciation		Fair Value		Gross Unrealized Depreciation
	(in millions)
Fixed maturities
Tax exempt	$	1,287	$	16	$	249	$	13	$	1,536	$	29
Taxable
U.S. government and government agency and authority obligations		52		1		10		—		62		1
Corporate bonds		1,695		30		441		15		2,136		45
Foreign government and government agency obligations		430		3		125		2		555		5
Residential mortgage-backed securities		—		—		5		1		5		1
Commercial mortgage-backed securities		47		1		32		—		79		1
		2,224		35		613		18		2,837		53
Total fixed maturities		3,511		51		862		31		4,373		82
Equity securities		138		27		8		4		146		31
	$	3,649	$	78	$	870	$	35	$	4,519	$	113

At September 30, 2015, approximately 1,125 individual fixed maturities and 25 individual equity securities were in an unrealized loss position. The Corporation does not have the intent to sell and it is not more likely than not that the Corporation will be required to sell these fixed maturities before the securities recover to their amortized cost value. In addition, the Corporation believes that none of the declines in the fair values of these fixed maturities relate to credit losses. The Corporation has the intent and ability to hold the equity securities in an unrealized loss position for a period of time sufficient to allow for the recovery of cost. The Corporation believes that none of the declines in the fair value of these fixed maturities and equity securities were other than temporary at September 30, 2015.

The following table summarizes, for all investment securities in an unrealized loss position at December 31, 2014, the aggregate fair value and gross unrealized depreciation, including unrealized other-than-temporary impairment losses, by investment category and length of time that individual securities have continuously been in an unrealized loss position.

	Less Than 12 Months				12 Months or More				Total
	Fair Value		Gross Unrealized Depreciation		Fair Value		Gross Unrealized Depreciation		Fair Value		Gross Unrealized Depreciation
	(in millions)
Fixed maturities
Tax exempt	$	422	$	3	$	305	$	13	$	727	$	16
Taxable
U.S. government and government agency and authority obligations		936		1		36		—		972		1
Corporate bonds		1,327		23		888		17		2,215		40
Foreign government and government agency obligations		318		1		207		2		525		3
Residential mortgage-backed securities		—		—		7		1		7		1
Commercial mortgage-backed securities		106		—		67		1		173		1
		2,687		25		1,205		21		3,892		46
Total fixed maturities		3,109		28		1,510		34		4,619		62
Equity securities		67		11		11		8		78		19
	$	3,176	$	39	$	1,521	$	42	$	4,697	$	81

Change in Unrealized Appreciation or Depreciation of Investments Carried at Fair Value

The change in unrealized appreciation or depreciation of investments carried at fair value, including the change in unrealized other-than-temporary impairment losses, was as follows:

	Periods Ended September 30
	Third Quarter						Nine Months
	2015			2014			2015			2014
	(in millions)
Change in unrealized appreciation of fixed maturities	$	134		$	2		$	(275	)	$	619
Change in unrealized appreciation of equity securities		(163	)		(73	)		(164	)		37
		(29	)		(71	)		(439	)		656
Deferred income tax (credit)		(10	)		(25	)		(154	)		229
	$	(19	)	$	(46	)	$	(285	)	$	427

Realized Investment Gains and Losses

(c) Realized investment gains and losses were as follows:

	Periods Ended September 30
	Third Quarter						Nine Months
	2015			2014			2015			2014
				(in millions)
Fixed maturities
Gross realized gains	$	20		$	27		$	50		$	104
Gross realized losses		(5	)		(5	)		(23	)		(33	)
Other-than-temporary impairment losses		(11	)		—			(12	)		(4	)
		4			22			15			67
Equity securities
Gross realized gains		42			43			58			132
Other-than-temporary impairment losses		(15	)		—			(37	)		(1	)
		27			43			21			131
Other invested assets		51			45			77			153
	$	82		$	110		$	113		$	351

XML

Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Assets
Short Term Investments	$ 3,052	$ 1,318
Fixed Maturities (cost $35,469 and $36,958)	37,016	38,780
Equity Securities (cost $1,060 and $1,089)	1,771	1,964
Other Invested Assets	1,422	1,423
TOTAL INVESTED ASSETS	43,261	43,485
Cash	53	47
Accrued Investment Income	403	410
Premiums Receivable	2,480	2,560
Reinsurance Recoverable on Unpaid Losses and Loss Expenses	1,505	1,639
Prepaid Reinsurance Premiums	257	256
Deferred Policy Acquisition Costs	1,302	1,284
Deferred Income Tax	120
Goodwill	467	467
Other Assets	1,344	1,138
TOTAL ASSETS	51,192	51,286
Liabilities
Unpaid Losses and Loss Expenses	22,359	22,678
Unearned Premiums	6,636	6,581
Long Term Debt	3,300	3,300
Dividend Payable to Shareholders	130	117
Deferred Income Tax		15
Accrued Expenses and Other Liabilities	2,396	2,299
TOTAL LIABILITIES	34,821	34,990
Shareholders' Equity
Common Stock - $1 Par Value; 371,980,460 Shares	372	372
Paid-In Surplus	179	171
Retained Earnings	24,596	23,520
Accumulated Other Comprehensive Income	661	1,110
Treasury Stock, at Cost - 144,924,588 and 139,551,071 Shares	(9,437)	(8,877)
TOTAL SHAREHOLDERS' EQUITY	16,371	16,296
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 51,192	$ 51,286

XML

Invested Assets

9 Months Ended

Sep. 30, 2015

Text Block [Abstract]

Invested Assets

4) Invested Assets

(a) The amortized cost and fair value of fixed maturities and equity securities were as follows:

	September 30, 2015
	Amortized Cost		Gross Unrealized Appreciation		Gross Unrealized Depreciation		Fair Value
	(in millions)
Fixed maturities
Tax exempt	$	18,890	$	1,012	$	29	$	19,873
Taxable
U.S. government and government agency and authority obligations		1,259		54		1		1,312
Corporate bonds		8,409		260		45		8,624
Foreign government and government agency obligations		5,858		269		5		6,122
Residential mortgage-backed securities		110		15		1		124
Commercial mortgage-backed securities		943		19		1		961
		16,579		617		53		17,143
Total fixed maturities	$	35,469	$	1,629	$	82	$	37,016
Equity securities	$	1,060	$	742	$	31	$	1,771

	December 31, 2014
	Amortized Cost		Gross Unrealized Appreciation		Gross Unrealized Depreciation		Fair Value
	(in millions)
Fixed maturities
Tax exempt	$	18,614	$	1,174	$	16	$	19,772
Taxable
U.S. government and government agency and authority obligations		1,962		46		1		2,007
Corporate bonds		8,741		327		40		9,028
Foreign government and government agency obligations		6,380		295		3		6,672
Residential mortgage-backed securities		192		20		1		211
Commercial mortgage-backed securities		1,069		22		1		1,090
		18,344		710		46		19,008
Total fixed maturities	$	36,958	$	1,884	$	62	$	38,780
Equity securities	$	1,089	$	894	$	19	$	1,964

The fair value and amortized cost of fixed maturities at September 30, 2015 by contractual maturity were as follows:

	Fair Value		Amortized Cost
	(in millions)
Due in one year or less	$	2,193	$	2,174
Due after one year through five years		11,621		11,173
Due after five years through ten years		13,722		13,032
Due after ten years		8,395		8,037
		35,931		34,416
Residential mortgage-backed securities		124		110
Commercial mortgage-backed securities		961		943
	$	37,016	$	35,469

Actual maturities could differ from contractual maturities because borrowers may have the right to call or prepay obligations.

The Corporation’s equity securities comprise a diversified portfolio of primarily U.S. publicly-traded common stocks.

The Corporation is involved in the normal course of business with VIEs primarily as a passive investor in residential mortgage-backed securities, commercial mortgage-backed securities and private equity limited partnerships issued by third party VIEs. The Corporation is not the primary beneficiary of these VIEs. The Corporation’s maximum exposure to loss with respect to these investments is limited to the investment carrying values included in the Corporation’s consolidated balance sheet and any unfunded partnership commitments.

(b) The components of unrealized appreciation or depreciation, including unrealized other-than-temporary impairment losses, of investments carried at fair value were as follows:

	September 30 2015		December 31 2014
	(in millions)
Fixed maturities
Gross unrealized appreciation	$	1,629	$	1,884
Gross unrealized depreciation		82		62
		1,547		1,822
Equity securities
Gross unrealized appreciation		742		894
Gross unrealized depreciation		31		19
		711		875
		2,258		2,697
Deferred income tax liability		790		944
	$	1,468	$	1,753

The following table summarizes, for all investment securities in an unrealized loss position at September 30, 2015, the aggregate fair value and gross unrealized depreciation, including unrealized other-than-temporary impairment losses, by investment category and length of time that individual securities have continuously been in an unrealized loss position.

	Less Than 12 Months				12 Months or More				Total
	Fair Value		Gross Unrealized Depreciation		Fair Value		Gross Unrealized Depreciation		Fair Value		Gross Unrealized Depreciation
	(in millions)
Fixed maturities
Tax exempt	$	1,287	$	16	$	249	$	13	$	1,536	$	29
Taxable
U.S. government and government agency and authority obligations		52		1		10		—		62		1
Corporate bonds		1,695		30		441		15		2,136		45
Foreign government and government agency obligations		430		3		125		2		555		5
Residential mortgage-backed securities		—		—		5		1		5		1
Commercial mortgage-backed securities		47		1		32		—		79		1
		2,224		35		613		18		2,837		53
Total fixed maturities		3,511		51		862		31		4,373		82
Equity securities		138		27		8		4		146		31
	$	3,649	$	78	$	870	$	35	$	4,519	$	113

At September 30, 2015, approximately 1,125 individual fixed maturities and 25 individual equity securities were in an unrealized loss position. The Corporation does not have the intent to sell and it is not more likely than not that the Corporation will be required to sell these fixed maturities before the securities recover to their amortized cost value. In addition, the Corporation believes that none of the declines in the fair values of these fixed maturities relate to credit losses. The Corporation has the intent and ability to hold the equity securities in an unrealized loss position for a period of time sufficient to allow for the recovery of cost. The Corporation believes that none of the declines in the fair value of these fixed maturities and equity securities were other than temporary at September 30, 2015.

The following table summarizes, for all investment securities in an unrealized loss position at December 31, 2014, the aggregate fair value and gross unrealized depreciation, including unrealized other-than-temporary impairment losses, by investment category and length of time that individual securities have continuously been in an unrealized loss position.

	Less Than 12 Months				12 Months or More				Total
	Fair Value		Gross Unrealized Depreciation		Fair Value		Gross Unrealized Depreciation		Fair Value		Gross Unrealized Depreciation
	(in millions)
Fixed maturities
Tax exempt	$	422	$	3	$	305	$	13	$	727	$	16
Taxable
U.S. government and government agency and authority obligations		936		1		36		—		972		1
Corporate bonds		1,327		23		888		17		2,215		40
Foreign government and government agency obligations		318		1		207		2		525		3
Residential mortgage-backed securities		—		—		7		1		7		1
Commercial mortgage-backed securities		106		—		67		1		173		1
		2,687		25		1,205		21		3,892		46
Total fixed maturities		3,109		28		1,510		34		4,619		62
Equity securities		67		11		11		8		78		19
	$	3,176	$	39	$	1,521	$	42	$	4,697	$	81

The change in unrealized appreciation or depreciation of investments carried at fair value, including the change in unrealized other-than-temporary impairment losses, was as follows:

	Periods Ended September 30
	Third Quarter						Nine Months
	2015			2014			2015			2014
	(in millions)
Change in unrealized appreciation of fixed maturities	$	134		$	2		$	(275	)	$	619
Change in unrealized appreciation of equity securities		(163	)		(73	)		(164	)		37
		(29	)		(71	)		(439	)		656
Deferred income tax (credit)		(10	)		(25	)		(154	)		229
	$	(19	)	$	(46	)	$	(285	)	$	427

(c) Realized investment gains and losses were as follows:

	Periods Ended September 30
	Third Quarter						Nine Months
	2015			2014			2015			2014
				(in millions)
Fixed maturities
Gross realized gains	$	20		$	27		$	50		$	104
Gross realized losses		(5	)		(5	)		(23	)		(33	)
Other-than-temporary impairment losses		(11	)		—			(12	)		(4	)
		4			22			15			67
Equity securities
Gross realized gains		42			43			58			132
Other-than-temporary impairment losses		(15	)		—			(37	)		(1	)
		27			43			21			131
Other invested assets		51			45			77			153
	$	82		$	110		$	113		$	351

(d) As of September 30, 2015 and December 31, 2014, fixed maturities still held by the Corporation for which a portion of their other-than-temporary impairment losses were recognized in other comprehensive income had cumulative credit-related losses of $16 million and $18 million, respectively, recognized in net income.

XML

Accounting Pronouncements Not Yet Adopted

9 Months Ended

Sep. 30, 2015

Accounting Changes and Error Corrections [Abstract]

Accounting Pronouncements Not Yet Adopted

3) Accounting Pronouncements Not Yet Adopted

In February 2015, the Financial Accounting Standards Board issued updated guidance that amends certain aspects of the current consolidation accounting guidance. In particular, the new guidance modifies the evaluation of whether limited partnerships and similar legal entities are variable interest entities (VIEs) or voting interest entities and eliminates the presumption that a general partner should consolidate a limited partnership. The new guidance would be effective for the Corporation for the year beginning January 1, 2016. The Corporation is in the process of assessing the effect, if any, that the implementation of this guidance will have on its financial position and results of operations.

XML

Merger Agreement with ACE Limited - Additional Information (Detail)	Jun. 30, 2015 USD ($) $ / shares shares	Sep. 30, 2015 USD ($) $ / shares	Jun. 30, 2015 SFr / shares	Jun. 30, 2015 $ / shares	Dec. 31, 2014 $ / shares
Business Acquisition [Line Items]
Common Stock, Par Value		$ 1			$ 1
ACE Limited [Member]
Business Acquisition [Line Items]
Common Stock, Par Value				$ 1.00
Amount of common share of ACE converted from common stock of Chubb | shares	0.6019
ACE common stock, par value per share | SFr / shares			SFr 24.15
Cash received per share of Chubb common stock due to conversion to ACE common share	$ 62.93
Termination fee | $	$ 930,000,000
Accrued termination fee | $		$ 0

XML

Comprehensive Income (Tables)

9 Months Ended

Sep. 30, 2015

Equity [Abstract]

Components of Other Comprehensive Income or Loss

The components of other comprehensive income or loss were as follows:

	Periods Ended September 30, 2015
	Third Quarter									Nine Months
	Before Tax			Income Tax			Net of Tax			Before Tax			Income Tax			Net of Tax
	(in millions)
Net unrealized holding gains (losses) arising during the period	$	2		$	1		$	1		$	(403	)	$	(141	)	$	(262	)
Reclassification adjustment for net realized gains included in net income		31			11			20			36			13			23
Net unrealized losses recognized in other comprehensive loss		(29	)		(10	)		(19	)		(439	)		(154	)		(285	)
Postretirement benefit gain not yet recognized in net income arising during the period		2			—			2			7			2			5
Reclassification adjustment for the amortization of net actuarial loss and prior service cost included in net income (a)		(15	)		(6	)		(9	)		(47	)		(17	)		(30	)
Net change in postretirement benefit costs not yet recognized in net income		17			6			11			54			19			35
Foreign currency translation losses		(58	)		(20	)		(38	)		(305	)		(106	)		(199	)
Total other comprehensive loss	$	(70	)	$	(24	)	$	(46	)	$	(690	)	$	(241	)	$	(449	)
	Periods Ended September 30, 2014
	Third Quarter									Nine Months
	Before Tax			Income Tax			Net of Tax			Before Tax			Income Tax			Net of Tax
	(in millions)
Net unrealized holding gains (losses) arising during the period	$	(6	)	$	(3	)	$	(3	)	$	854		$	298		$	556
Reclassification adjustment for net realized gains included in net income		65			22			43			198			69			129
Net unrealized gains (losses) recognized in other comprehensive income or loss		(71	)		(25	)		(46	)		656			229			427
Postretirement benefit gain not yet recognized in net income arising during the period		1			—			1			1			—			1
Reclassification adjustment for the amortization of net actuarial loss and prior service cost included in net income (a)		(9	)		(4	)		(5	)		(26	)		(10	)		(16	)
Net change in postretirement benefit costs not yet recognized in net income		10			4			6			27			10			17
Foreign currency translation losses		(40	)		(14	)		(26	)		(62	)		(21	)		(41	)
Total other comprehensive income (loss)	$	(101	)	$	(35	)	$	(66	)	$	621		$	218		$	403

(a) Postretirement benefit costs recognized in net income during the period are included among several of the loss and expense components presented in the consolidated statements of income.

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Fair Values of Financial Instruments

9 Months Ended

Sep. 30, 2015

Fair Value Disclosures [Abstract]

Fair Values of Financial Instruments

7) Fair Values of Financial Instruments

Fair values of financial instruments are determined by management using valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs. Fair values are generally measured using quoted prices in active markets for identical assets or liabilities or other inputs, such as quoted prices for similar assets or liabilities, that are observable, either directly or indirectly. In those instances where observable inputs are not available, fair values are measured using unobservable inputs for the asset or liability. Unobservable inputs reflect the Corporation’s own assumptions about the assumptions that market participants would use in pricing the asset or liability and are developed based on the best information available in the circumstances. Fair value estimates derived from unobservable inputs are affected by the assumptions used, including the discount rates and the estimated amounts and timing of future cash flows. The derived fair value estimates cannot be substantiated by comparison to independent markets and are not necessarily indicative of the amounts that would be realized in a current market exchange. Certain financial instruments, particularly insurance contracts, are excluded from fair value disclosure requirements.

The methods and assumptions used to estimate the fair values of financial instruments are as follows:

(i) The carrying value of short term investments approximates fair value due to the short maturities of these investments.

(ii) Fair values of fixed maturities are determined by management, utilizing prices obtained from a third party, nationally recognized pricing service or, in the case of securities for which prices are not provided by a pricing service, from third party brokers. For fixed maturities that have quoted prices in active markets, market quotations are provided. For fixed maturities that do not trade on a daily basis, the pricing service and brokers provide fair value estimates using a variety of inputs including, but not limited to, benchmark yields, reported trades, broker/dealer quotes, issuer spreads, bids, offers, reference data, prepayment rates and measures of volatility. Management reviews on an ongoing basis the reasonableness of the methodologies used by the relevant pricing service and brokers. In addition, management, using the prices received for the securities from the pricing service and brokers, determines the aggregate portfolio price performance and reviews it against applicable indices. If management believes that significant discrepancies exist, it will discuss these with the relevant pricing service or broker to resolve the discrepancies.

(iii) Fair values of equity securities are determined by management, utilizing quoted market prices.

(iv) Fair values of long term debt issued by Chubb are determined by management, utilizing prices obtained from a third party, nationally recognized pricing service.

The carrying values and fair values of financial instruments were as follows:

	September 30, 2015				December 31, 2014
	Carrying Value		Fair Value		Carrying Value		Fair Value
	(in millions)
Assets
Invested assets
Short term investments	$	3,052	$	3,052	$	1,318	$	1,318
Fixed maturities		37,016		37,016		38,780		38,780
Equity securities		1,771		1,771		1,964		1,964
Liabilities
Long term debt		3,300		3,788		3,300		4,013

At September 30, 2015 and December 31, 2014, a pricing service provided fair value amounts for approximately 99% of the Corporation’s fixed maturities. The prices obtained from a pricing service and brokers generally are non-binding, but are reflective of current market transactions in the applicable financial instruments.

At September 30, 2015 and December 31, 2014, the Corporation held an insignificant amount of financial instruments in its investment portfolio for which a lack of market liquidity impacted the determination of fair value.

The fair value hierarchy prioritizes the inputs to valuation techniques used to measure fair value into three broad levels as follows:

Level 1 – Unadjusted quoted prices in active markets for identical financial instruments.

Level 2 – Other inputs that are observable for the financial instrument, either directly or indirectly.

Level 3 – Significant unobservable inputs.

The fair value of financial instruments categorized based upon the lowest level of input that was significant to the fair value measurement was as follows:

	September 30, 2015
	Level 1		Level 2		Level 3		Total
	(in millions)
Assets
Short term investments	$	277	$	2,775	$	—	$	3,052
Fixed maturities
Tax exempt		—		19,871		2		19,873
Taxable
U.S. government and government agency and authority obligations		—		1,312		—		1,312
Corporate bonds		—		8,431		193		8,624
Foreign government and government agency obligations		—		6,122		—		6,122
Residential mortgage-backed securities		—		122		2		124
Commercial mortgage-backed securities		—		961		—		961
		—		16,948		195		17,143
Total fixed maturities		—		36,819		197		37,016
Equity securities		1,765		—		6		1,771
	$	2,042	$	39,594	$	203	$	41,839
Liabilities
Long term debt	$	—	$	3,788	$	—	$	3,788

	December 31, 2014
	Level 1		Level 2		Level 3		Total
	(in millions)
Assets
Short term investments	$	206	$	1,112	$	—	$	1,318
Fixed maturities
Tax exempt		—		19,769		3		19,772
Taxable
U.S. government and government agency and authority obligations		—		2,007		—		2,007
Corporate bonds		—		8,912		116		9,028
Foreign government and government agency obligations		—		6,663		9		6,672
Residential mortgage-backed securities		—		210		1		211
Commercial mortgage-backed securities		—		1,090		—		1,090
		—		18,882		126		19,008
Total fixed maturities		—		38,651		129		38,780
Equity securities		1,958		—		6		1,964
	$	2,164	$	39,763	$	135	$	42,062
Liabilities
Long term debt	$	—	$	4,013	$	—	$	4,013

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Comprehensive Income

9 Months Ended

Sep. 30, 2015

Equity [Abstract]

Comprehensive Income

5) Comprehensive Income

Comprehensive income is defined as all changes in shareholders’ equity, except those arising from transactions with shareholders. Comprehensive income includes net income and other comprehensive income or loss, which for the Corporation consists of changes in unrealized appreciation or depreciation of investments carried at fair value, changes in unrealized other-than-temporary impairment losses of fixed maturities, changes in postretirement benefit costs not yet recognized in net income and changes in foreign currency translation gains or losses.

The components of other comprehensive income or loss were as follows:

	Periods Ended September 30, 2015
	Third Quarter									Nine Months
	Before Tax			Income Tax			Net of Tax			Before Tax			Income Tax			Net of Tax
	(in millions)
Net unrealized holding gains (losses) arising during the period	$	2		$	1		$	1		$	(403	)	$	(141	)	$	(262	)
Reclassification adjustment for net realized gains included in net income		31			11			20			36			13			23
Net unrealized losses recognized in other comprehensive loss		(29	)		(10	)		(19	)		(439	)		(154	)		(285	)
Postretirement benefit gain not yet recognized in net income arising during the period		2			—			2			7			2			5
Reclassification adjustment for the amortization of net actuarial loss and prior service cost included in net income (a)		(15	)		(6	)		(9	)		(47	)		(17	)		(30	)
Net change in postretirement benefit costs not yet recognized in net income		17			6			11			54			19			35
Foreign currency translation losses		(58	)		(20	)		(38	)		(305	)		(106	)		(199	)
Total other comprehensive loss	$	(70	)	$	(24	)	$	(46	)	$	(690	)	$	(241	)	$	(449	)
	Periods Ended September 30, 2014
	Third Quarter									Nine Months
	Before Tax			Income Tax			Net of Tax			Before Tax			Income Tax			Net of Tax
	(in millions)
Net unrealized holding gains (losses) arising during the period	$	(6	)	$	(3	)	$	(3	)	$	854		$	298		$	556
Reclassification adjustment for net realized gains included in net income		65			22			43			198			69			129
Net unrealized gains (losses) recognized in other comprehensive income or loss		(71	)		(25	)		(46	)		656			229			427
Postretirement benefit gain not yet recognized in net income arising during the period		1			—			1			1			—			1
Reclassification adjustment for the amortization of net actuarial loss and prior service cost included in net income (a)		(9	)		(4	)		(5	)		(26	)		(10	)		(16	)
Net change in postretirement benefit costs not yet recognized in net income		10			4			6			27			10			17
Foreign currency translation losses		(40	)		(14	)		(26	)		(62	)		(21	)		(41	)
Total other comprehensive income (loss)	$	(101	)	$	(35	)	$	(66	)	$	621		$	218		$	403

(a) Postretirement benefit costs recognized in net income during the period are included among several of the loss and expense components presented in the consolidated statements of income.

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Segments Information

9 Months Ended

Sep. 30, 2015

Segment Reporting [Abstract]

Segments Information

6) Segments Information

The principal business of the Corporation is the sale of property and casualty insurance. The profitability of the property and casualty insurance business depends on the results of both underwriting operations and investments, which are viewed as two distinct operations. The underwriting operations are managed and evaluated separately from the investment function.

The property and casualty insurance subsidiaries underwrite most lines of property and casualty insurance. Underwriting operations consist of four separate business units: personal insurance, commercial insurance, specialty insurance and reinsurance assumed. The personal segment targets the personal insurance market. The personal classes include automobile, homeowners and other personal coverages. The commercial segment includes those classes of business that are generally available in broad markets and are of a more commodity nature. Commercial classes include multiple peril, casualty, workers’ compensation and property and marine. The specialty segment includes those classes of business that are available in more limited markets since they require specialized underwriting and claim settlement. Specialty classes include professional liability coverages and surety. The reinsurance assumed business has been in runoff since the transfer of the ongoing reinsurance assumed business to a reinsurance company in 2005.

Corporate and other includes investment income earned on corporate invested assets, corporate expenses and the results of the Corporation’s non-insurance subsidiaries.

Revenues and income before income tax of each operating segment were as follows:

	Periods Ended September 30
	Third Quarter						Nine Months
	2015			2014			2015			2014
	(in millions)
Revenues
Property and casualty insurance
Premiums earned
Personal insurance	$	1,114		$	1,118		$	3,364		$	3,296
Commercial insurance		1,390			1,338			4,077			3,943
Specialty insurance		662			663			1,964			1,972
Total insurance		3,166			3,119			9,405			9,211
Reinsurance assumed		—			—			(1	)		1
		3,166			3,119			9,404			9,212
Investment income		322			338			982			1,034
Total property and casualty insurance		3,488			3,457			10,386			10,246
Corporate and other		8			7			25			25
Realized investment gains, net		82			110			113			351
Total revenues	$	3,578		$	3,574		$	10,524		$	10,622
Income (loss) before income tax
Property and casualty insurance
Underwriting
Personal insurance	$	154		$	141		$	213		$	188
Commercial insurance		207			151			446			333
Specialty insurance		161			133			448			355
Total insurance		522			425			1,107			876
Reinsurance assumed		4			—			7			1
		526			425			1,114			877
Increase (decrease) in deferred policy acquisition costs		(1	)		14			44			48
Underwriting income		525			439			1,158			925
Investment income		310			327			949			1,004
Other charges		(4	)		—			(4	)		(4	)
Total property and casualty insurance		831			766			2,103			1,925
Corporate and other		(66	)		(58	)		(209	)		(177	)
Realized investment gains, net		82			110			113			351
Total income before income tax	$	847		$	818		$	2,007		$	2,099

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Earnings Per Share

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Earnings Per Share

8) Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share:

	Periods Ended September 30
	Third Quarter				Nine Months
	2015		2014		2015		2014
	(in millions, except for per share amounts)
Basic earnings per share:
Net income	$	601	$	594	$	1,470	$	1,542
Weighted average shares outstanding		229.4		240.2		231.2		244.8
Basic earnings per share	$	2.62	$	2.47	$	6.36	$	6.30
Diluted earnings per share:
Net income	$	601	$	594	$	1,470	$	1,542
Weighted average shares outstanding		229.4		240.2		231.2		244.8
Additional shares from assumed issuance of shares under stock-based compensation awards		1.7		.4		.9		.6
Weighted average shares and potential shares assumed outstanding for computing diluted earnings per share		231.1		240.6		232.1		245.4
Diluted earnings per share	$	2.60	$	2.47	$	6.33	$	6.28

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Fair Values of Financial Instruments - Carrying Values and Fair Values of Financial Instruments (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short Term Investments	$ 3,052	$ 1,318
Fixed maturities	37,016	38,780
Equity securities	1,771	1,964
Long Term Debt	3,300	3,300
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short Term Investments	3,052	1,318
Fixed maturities	37,016	38,780
Equity securities	1,771	1,964
Long Term Debt	3,300	3,300
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short Term Investments	3,052	1,318
Fixed maturities	37,016	38,780
Equity securities	1,771	1,964
Long Term Debt	$ 3,788	$ 4,013

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Fair Values of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2015

Fair Value Disclosures [Abstract]

Carrying Values and Fair Values of Financial Instruments

The carrying values and fair values of financial instruments were as follows:

	September 30, 2015				December 31, 2014
	Carrying Value		Fair Value		Carrying Value		Fair Value
	(in millions)
Assets
Invested assets
Short term investments	$	3,052	$	3,052	$	1,318	$	1,318
Fixed maturities		37,016		37,016		38,780		38,780
Equity securities		1,771		1,771		1,964		1,964
Liabilities
Long term debt		3,300		3,788		3,300		4,013

Fair Value of Financial Instruments Categorized Based Upon Lowest Level of Input

The fair value of financial instruments categorized based upon the lowest level of input that was significant to the fair value measurement was as follows:

	September 30, 2015
	Level 1		Level 2		Level 3		Total
	(in millions)
Assets
Short term investments	$	277	$	2,775	$	—	$	3,052
Fixed maturities
Tax exempt		—		19,871		2		19,873
Taxable
U.S. government and government agency and authority obligations		—		1,312		—		1,312
Corporate bonds		—		8,431		193		8,624
Foreign government and government agency obligations		—		6,122		—		6,122
Residential mortgage-backed securities		—		122		2		124
Commercial mortgage-backed securities		—		961		—		961
		—		16,948		195		17,143
Total fixed maturities		—		36,819		197		37,016
Equity securities		1,765		—		6		1,771
	$	2,042	$	39,594	$	203	$	41,839
Liabilities
Long term debt	$	—	$	3,788	$	—	$	3,788

	December 31, 2014
	Level 1		Level 2		Level 3		Total
	(in millions)
Assets
Short term investments	$	206	$	1,112	$	—	$	1,318
Fixed maturities
Tax exempt		—		19,769		3		19,772
Taxable
U.S. government and government agency and authority obligations		—		2,007		—		2,007
Corporate bonds		—		8,912		116		9,028
Foreign government and government agency obligations		—		6,663		9		6,672
Residential mortgage-backed securities		—		210		1		211
Commercial mortgage-backed securities		—		1,090		—		1,090
		—		18,882		126		19,008
Total fixed maturities		—		38,651		129		38,780
Equity securities		1,958		—		6		1,964
	$	2,164	$	39,763	$	135	$	42,062
Liabilities
Long term debt	$	—	$	4,013	$	—	$	4,013

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Invested Assets - Components of Unrealized Appreciation or Depreciation of Investments (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Fixed maturities, Gross Unrealized Appreciation	$ 1,629	$ 1,884
Fixed maturities, Gross Unrealized Depreciation	82	62
Fixed maturities, Unrealized appreciation (depreciation), Net	1,547	1,822
Equity securities, Gross Unrealized Appreciation	742	894
Equity securities, Gross Unrealized Depreciation	31	19
Equity securities, Unrealized appreciation (depreciation), Net	711	875
Total fixed maturities and equity securities, Unrealized appreciation (depreciation), Net	2,258	2,697
Deferred income tax liability	790	944
Total fixed maturities and equity securities, Unrealized appreciation (depreciation), Net of tax	$ 1,468	$ 1,753

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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Fixed Maturities, cost	$ 35,469	$ 36,958
Equity Securities, cost	$ 1,060	$ 1,089
Common Stock, Par Value	$ 1	$ 1
Common Stock, Shares issued	371,980,460	371,980,460
Treasury Stock, Shares	144,924,588	139,551,071

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Merger Agreement with ACE Limited

9 Months Ended

Sep. 30, 2015

Business Combinations [Abstract]

Merger Agreement with ACE Limited

2) Merger Agreement with ACE Limited

On June 30, 2015, Chubb entered into an Agreement and Plan of Merger (Merger Agreement) with ACE Limited (ACE), a company organized under the laws of Switzerland, and William Investment Holdings Corporation (Merger Sub), a New Jersey corporation and a wholly owned indirect subsidiary of ACE, pursuant to which Merger Sub will merge with and into Chubb, with Chubb surviving as a wholly owned indirect subsidiary of ACE (the Merger). ACE has indicated that shortly after the completion of the Merger, it expects to merge Chubb with and into ACE INA Holdings Inc., a Delaware corporation and indirect subsidiary of ACE, with ACE INA Holdings Inc. continuing as the surviving corporation.

At the effective time of the Merger, each share (except for certain shares held by ACE, Chubb or their subsidiaries) of common stock of Chubb, par value $1.00 per share, will be converted into the right to receive 0.6019 of a common share of ACE, par value CHF 24.15 per share, and $62.93 in cash.

The Board of Directors of Chubb (the Board) unanimously approved the Merger Agreement and the transactions contemplated thereby, including the Merger. The closing of the Merger is subject to various customary conditions, including receipt of required insurance regulatory and other governmental approvals. Some other closing conditions have already been satisfied, including Chubb shareholder approval of the Merger Agreement, approval by ACE shareholders of certain Merger-related matters and the termination of the applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended. The transaction is expected to close during the first quarter of 2016.

The Merger Agreement contains certain termination rights for both Chubb and ACE and further provides that, upon termination under specified circumstances, Chubb would be required to pay to ACE a termination fee of $930 million. No such termination fee has been accrued as of September 30, 2015.

Pursuant to the Merger Agreement, until the effective time of the Merger or termination of the Merger Agreement, the Corporation is required to conduct its business in the ordinary course in all material respects and, without the prior written consent of ACE, cannot take certain actions, except in each case as permitted pursuant to the Merger Agreement.

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Invested Assets - Fair Value and Gross Unrealized Depreciation of Investments in Unrealized Loss Position (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Investment Holdings [Line Items]
Investment securities, Continuous unrealized loss position, Less Than 12 Months, Fair Value	$ 3,649	$ 3,176
Investment securities, Continuous unrealized loss position, Less Than 12 Months, Gross Unrealized Depreciation	78	39
Investment securities, Continuous unrealized loss position, 12 Months or More, Fair Value	870	1,521
Investment securities, Continuous unrealized loss position, 12 Months or More, Gross Unrealized Depreciation	35	42
Investment securities, Continuous unrealized loss position, Fair Value, Total	4,519	4,697
Investment securities, Continuous unrealized loss position, Gross Unrealized Depreciation, Total	113	81
Fixed Maturities [Member]
Investment Holdings [Line Items]
Investment securities, Continuous unrealized loss position, Less Than 12 Months, Fair Value	3,511	3,109
Investment securities, Continuous unrealized loss position, Less Than 12 Months, Gross Unrealized Depreciation	51	28
Investment securities, Continuous unrealized loss position, 12 Months or More, Fair Value	862	1,510
Investment securities, Continuous unrealized loss position, 12 Months or More, Gross Unrealized Depreciation	31	34
Investment securities, Continuous unrealized loss position, Fair Value, Total	4,373	4,619
Investment securities, Continuous unrealized loss position, Gross Unrealized Depreciation, Total	82	62
Equity Securities [Member]
Investment Holdings [Line Items]
Investment securities, Continuous unrealized loss position, Less Than 12 Months, Fair Value	138	67
Investment securities, Continuous unrealized loss position, Less Than 12 Months, Gross Unrealized Depreciation	27	11
Investment securities, Continuous unrealized loss position, 12 Months or More, Fair Value	8	11
Investment securities, Continuous unrealized loss position, 12 Months or More, Gross Unrealized Depreciation	4	8
Investment securities, Continuous unrealized loss position, Fair Value, Total	146	78
Investment securities, Continuous unrealized loss position, Gross Unrealized Depreciation, Total	31	19
Tax Exempt [Member] | Fixed Maturities [Member]
Investment Holdings [Line Items]
Investment securities, Continuous unrealized loss position, Less Than 12 Months, Fair Value	1,287	422
Investment securities, Continuous unrealized loss position, Less Than 12 Months, Gross Unrealized Depreciation	16	3
Investment securities, Continuous unrealized loss position, 12 Months or More, Fair Value	249	305
Investment securities, Continuous unrealized loss position, 12 Months or More, Gross Unrealized Depreciation	13	13
Investment securities, Continuous unrealized loss position, Fair Value, Total	1,536	727
Investment securities, Continuous unrealized loss position, Gross Unrealized Depreciation, Total	29	16
Taxable [Member] | Fixed Maturities [Member]
Investment Holdings [Line Items]
Investment securities, Continuous unrealized loss position, Less Than 12 Months, Fair Value	2,224	2,687
Investment securities, Continuous unrealized loss position, Less Than 12 Months, Gross Unrealized Depreciation	35	25
Investment securities, Continuous unrealized loss position, 12 Months or More, Fair Value	613	1,205
Investment securities, Continuous unrealized loss position, 12 Months or More, Gross Unrealized Depreciation	18	21
Investment securities, Continuous unrealized loss position, Fair Value, Total	2,837	3,892
Investment securities, Continuous unrealized loss position, Gross Unrealized Depreciation, Total	53	46
Taxable [Member] | U.S. Government and Government Agency and Authority Obligations [Member] | Fixed Maturities [Member]
Investment Holdings [Line Items]
Investment securities, Continuous unrealized loss position, Less Than 12 Months, Fair Value	52	936
Investment securities, Continuous unrealized loss position, Less Than 12 Months, Gross Unrealized Depreciation	1	1
Investment securities, Continuous unrealized loss position, 12 Months or More, Fair Value	10	36
Investment securities, Continuous unrealized loss position, Fair Value, Total	62	972
Investment securities, Continuous unrealized loss position, Gross Unrealized Depreciation, Total	1	1
Taxable [Member] | Corporate Bonds [Member] | Fixed Maturities [Member]
Investment Holdings [Line Items]
Investment securities, Continuous unrealized loss position, Less Than 12 Months, Fair Value	1,695	1,327
Investment securities, Continuous unrealized loss position, Less Than 12 Months, Gross Unrealized Depreciation	30	23
Investment securities, Continuous unrealized loss position, 12 Months or More, Fair Value	441	888
Investment securities, Continuous unrealized loss position, 12 Months or More, Gross Unrealized Depreciation	15	17
Investment securities, Continuous unrealized loss position, Fair Value, Total	2,136	2,215
Investment securities, Continuous unrealized loss position, Gross Unrealized Depreciation, Total	45	40
Taxable [Member] | Foreign Government and Government Agency Obligations [Member] | Fixed Maturities [Member]
Investment Holdings [Line Items]
Investment securities, Continuous unrealized loss position, Less Than 12 Months, Fair Value	430	318
Investment securities, Continuous unrealized loss position, Less Than 12 Months, Gross Unrealized Depreciation	3	1
Investment securities, Continuous unrealized loss position, 12 Months or More, Fair Value	125	207
Investment securities, Continuous unrealized loss position, 12 Months or More, Gross Unrealized Depreciation	2	2
Investment securities, Continuous unrealized loss position, Fair Value, Total	555	525
Investment securities, Continuous unrealized loss position, Gross Unrealized Depreciation, Total	5	3
Residential Mortgage-backed Securities [Member] | Taxable [Member] | Fixed Maturities [Member]
Investment Holdings [Line Items]
Investment securities, Continuous unrealized loss position, 12 Months or More, Fair Value	5	7
Investment securities, Continuous unrealized loss position, 12 Months or More, Gross Unrealized Depreciation	1	1
Investment securities, Continuous unrealized loss position, Fair Value, Total	5	7
Investment securities, Continuous unrealized loss position, Gross Unrealized Depreciation, Total	1	1
Commercial Mortgage-backed Securities [Member] | Taxable [Member] | Fixed Maturities [Member]
Investment Holdings [Line Items]
Investment securities, Continuous unrealized loss position, Less Than 12 Months, Fair Value	47	106
Investment securities, Continuous unrealized loss position, Less Than 12 Months, Gross Unrealized Depreciation	1
Investment securities, Continuous unrealized loss position, 12 Months or More, Fair Value	32	67
Investment securities, Continuous unrealized loss position, 12 Months or More, Gross Unrealized Depreciation		1
Investment securities, Continuous unrealized loss position, Fair Value, Total	79	173
Investment securities, Continuous unrealized loss position, Gross Unrealized Depreciation, Total	$ 1	$ 1

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Segments Information (Tables)

9 Months Ended

Sep. 30, 2015

Segment Reporting [Abstract]

Revenues and Income Before Income Tax of Each Operating Segment

Revenues and income before income tax of each operating segment were as follows:

	Periods Ended September 30
	Third Quarter						Nine Months
	2015			2014			2015			2014
	(in millions)
Revenues
Property and casualty insurance
Premiums earned
Personal insurance	$	1,114		$	1,118		$	3,364		$	3,296
Commercial insurance		1,390			1,338			4,077			3,943
Specialty insurance		662			663			1,964			1,972
Total insurance		3,166			3,119			9,405			9,211
Reinsurance assumed		—			—			(1	)		1
		3,166			3,119			9,404			9,212
Investment income		322			338			982			1,034
Total property and casualty insurance		3,488			3,457			10,386			10,246
Corporate and other		8			7			25			25
Realized investment gains, net		82			110			113			351
Total revenues	$	3,578		$	3,574		$	10,524		$	10,622
Income (loss) before income tax
Property and casualty insurance
Underwriting
Personal insurance	$	154		$	141		$	213		$	188
Commercial insurance		207			151			446			333
Specialty insurance		161			133			448			355
Total insurance		522			425			1,107			876
Reinsurance assumed		4			—			7			1
		526			425			1,114			877
Increase (decrease) in deferred policy acquisition costs		(1	)		14			44			48
Underwriting income		525			439			1,158			925
Investment income		310			327			949			1,004
Other charges		(4	)		—			(4	)		(4	)
Total property and casualty insurance		831			766			2,103			1,925
Corporate and other		(66	)		(58	)		(209	)		(177	)
Realized investment gains, net		82			110			113			351
Total income before income tax	$	847		$	818		$	2,007		$	2,099