10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

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

For the Quarterly Period Ended March 31, 2019

OR

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

For the Transition Period from             to             

Commission File No. 1-11778

CHUBB LIMITED

(Exact name of registrant as specified in its charter)

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

Baerengasse 32

Zurich, Switzerland CH-8001

(Address of principal executive offices) (Zip Code)

+41 (0)43 456 76 00

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15 (d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

YES þ                                                 NO  ¨

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted 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 such files).

YES þ                                                 NO  ¨

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

Large accelerated filer þ	Accelerated filer ¨
Non-accelerated filer ¨	Smaller reporting company ¨
	Emerging growth company ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

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

YES ¨                                                NO  þ

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

The number of registrant’s Common Shares (CHF 24.15 par value) outstanding as of April 18, 2019 was 457,870,731.

CHUBB LIMITED

INDEX TO FORM 10-Q

Part I.	FINANCIAL INFORMATION		Page
Item 1.	Financial Statements:
	Consolidated Balance Sheets (Unaudited) March 31, 2019 and December 31, 2018		3
	Consolidated Statements of Operations and Comprehensive Income (Unaudited) Three Months Ended March 31, 2019 and 2018		4
	Consolidated Statements of Shareholders' Equity (Unaudited) Three Months Ended March 31, 2019 and 2018		5
	Consolidated Statements of Cash Flows (Unaudited) Three Months Ended March 31, 2019 and 2018		6
	Notes to Consolidated Financial Statements (Unaudited)
	Note 1.	General	7
	Note 2.	Investments	8
	Note 3.	Fair value measurements	13
	Note 4.	Unpaid losses and loss expenses	20
	Note 5.	Commitments, contingencies, and guarantees	23
	Note 6.	Shareholders’ equity	28
	Note 7.	Share-based compensation	29
	Note 8.	Postretirement benefits	29
	Note 9.	Segment information	30
	Note 10.	Earnings per share	32
	Note 11.	Information provided in connection with outstanding debt of subsidiaries	33
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations		38
Item 3.	Quantitative and Qualitative Disclosures About Market Risk		74
Item 4.	Controls and Procedures		76
Part II.	OTHER INFORMATION
Item 1.	Legal Proceedings		77
Item 1A.	Risk Factors		77
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds and Issuer Repurchases of Equity Securities		77
Item 6.	Exhibits		78

2

PART I FINANCIAL INFORMATION

ITEM 1. Financial Statements

CONSOLIDATED BALANCE SHEETS (Unaudited)

Chubb Limited and Subsidiaries

	March 31			December 31
(in millions of U.S. dollars, except share and per share data)	2019			2018
Assets
Investments
Fixed maturities available for sale, at fair value (amortized cost – $79,624and $79,323) (includes hybrid financial instruments of$8 and $9)	$	80,663		$	78,470
Fixed maturities held to maturity, at amortized cost (fair value – $13,240 and $13,259)	13,136			13,435
Equity securities, at fair value and cost	821			770
Short-term investments, at fair value and amortized cost	3,078			3,016
Other investments, at fair value and cost	5,562			5,277
Total investments	103,260			100,968
Cash	1,271			1,247
Restricted cash	122			93
Securities lending collateral	1,861			1,926
Accrued investment income	870			883
Insurance and reinsurance balances receivable	9,826			10,075
Reinsurance recoverable on losses and loss expenses	16,137			15,993
Reinsurance recoverable on policy benefits	203			202
Deferred policy acquisition costs	5,008			4,922
Value of business acquired	289			295
Goodwill	15,328			15,271
Other intangible assets	6,091			6,143
Prepaid reinsurance premiums	2,698			2,544
Investments in partially-owned insurance companies	708			678
Other assets	7,675			6,531
Total assets	$	171,347		$	167,771
Liabilities
Unpaid losses and loss expenses	$	63,143		$	62,960
Unearned premiums	15,909			15,532
Future policy benefits	5,552			5,506
Insurance and reinsurance balances payable	6,469			6,437
Securities lending payable	1,861			1,926
Accounts payable, accrued expenses, and other liabilities	11,210			10,472
Deferred tax liabilities	541			304
Repurchase agreements	1,419			1,418
Short-term debt	509			509
Long-term debt	12,071			12,087
Trust preferred securities	308			308
Total liabilities	118,992			117,459
Commitments and contingencies
Shareholders’ equity
Common Shares (CHF 24.15 par value; 479,783,864 shares issued; 458,179,205 and 459,203,378 shares outstanding)	11,121			11,121
Common Shares in treasury (21,604,659 and 20,580,486 shares)	(2,775		)	(2,618		)
Additional paid-in capital	12,051			12,557
Retained earnings	32,728			31,700
Accumulated other comprehensive income (loss) (AOCI)	(770		)	(2,448		)
Total shareholders’ equity	52,355			50,312
Total liabilities and shareholders’ equity	$	171,347		$	167,771

See accompanying notes to the consolidated financial statements

3

CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (Unaudited)

Chubb Limited and Subsidiaries

	Three Months Ended
	March 31
(in millions of U.S. dollars, except per share data)	2019			2018
Revenues
Net premiums written	$	7,313		$	7,104
Increase in unearned premiums	(176		)	(77		)
Net premiums earned	7,137			7,027
Net investment income	836			806
Net realized gains (losses):
Other-than-temporary impairment (OTTI) losses gross	(13		)	(1		)
Portion of OTTI losses recognized in other comprehensive income (OCI)	—			—
Net OTTI losses recognized in income	(13		)	(1		)
Net realized gains (losses) excluding OTTI losses	(84		)	(1		)
Total net realized gains (losses) (includes $(44) and $(23) reclassified from AOCI)	(97		)	(2		)
Total revenues	7,876			7,831
Expenses
Losses and loss expenses	4,098			4,102
Policy benefits	196			151
Policy acquisition costs	1,464			1,464
Administrative expenses	710			692
Interest expense	140			157
Other (income) expense	(39		)	(47		)
Amortization of purchased intangibles	76			85
Chubb integration expenses	3			10
Total expenses	6,648			6,614
Income before income tax	1,228			1,217
Income tax expense (benefit) (includes $(6) and $(3) on reclassified unrealized losses)	188			135
Net income	$	1,040		$	1,082
Other comprehensive income (loss)
Unrealized appreciation (depreciation)	$	1,845		$	(1,234	)
Reclassification adjustment for net realized (gains) losses included in net income	44			23
	1,889			(1,211		)
Change in:
Cumulative foreign currency translation adjustment	147			397
Postretirement benefit liability adjustment	(27		)	(23		)
Other comprehensive income (loss), before income tax	2,009			(837		)
Income tax (expense) benefit related to OCI items	(331		)	208
Other comprehensive income (loss)	1,678			(629		)
Comprehensive income	$	2,718		$	453
Earnings per share
Basic earnings per share	$	2.27		$	2.32
Diluted earnings per share	$	2.25		$	2.30

See accompanying notes to the consolidated financial statements

4

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited)

Chubb Limited and Subsidiaries

	Three Months Ended
	March 31
(in millions of U.S. dollars)	2019			2018
Common Shares
Balance – beginning and end of period	$	11,121		$	11,121
Common Shares in treasury
Balance – beginning of period	(2,618		)	(1,944		)
Common Shares repurchased	(367		)	—
Net shares redeemed under employee share-based compensation plans	210			217
Balance – end of period	(2,775		)	(1,727		)
Additional paid-in capital
Balance – beginning of period	12,557			13,978
Net shares redeemed under employee share-based compensation plans	(191		)	(262		)
Exercise of stock options	(34		)	(16		)
Share-based compensation expense	54			62
Funding of dividends declared to Retained earnings	(335		)	(332		)
Balance – end of period	12,051			13,430
Retained earnings
Balance – beginning of period	31,700			27,474
Cumulative effect of adoption of accounting guidance (refer to Note 1)	(12		)	409
Balance – beginning of period, as adjusted	31,688			27,883
Net income	1,040			1,082
Funding of dividends declared from Additional paid-in capital	335			332
Dividends declared on Common Shares	(335		)	(332		)
Balance – end of period	32,728			28,965
Accumulated other comprehensive income (loss)
Net unrealized appreciation on investments
Balance – beginning of period	(545		)	1,450
Cumulative effect of adoption of accounting guidance	—			(416		)
Balance – beginning of period, as adjusted	(545		)	1,034
Change in period, before reclassification from AOCI, net of income tax     benefit (expense) of $(324) and $226	1,521			(1,008		)
Amounts reclassified from AOCI, net of income tax expense of $(6) and $(3)	38			20
Change in period, net of income tax benefit (expense) of $(330) and $223	1,559			(988		)
Balance – end of period	1,014			46
Cumulative foreign currency translation adjustment
Balance – beginning of period	(1,976		)	(1,187		)
Change in period, net of income tax expense of $(7) and $(19)	140			378
Balance – end of period	(1,836		)	(809		)
Postretirement benefit liability adjustment
Balance – beginning of period	73			280
Change in period, net of income tax benefit of $6 and $4	(21		)	(19		)
Balance – end of period	52			261
Accumulated other comprehensive income (loss)	(770		)	(502		)
Total shareholders’ equity	$	52,355		$	51,287

See accompanying notes to the consolidated financial statements

5

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited)

Chubb Limited and Subsidiaries

	Three Months Ended March 31
(in millions of U.S. dollars)	2019			2018
Cash flows from operating activities
Net income	$	1,040		$	1,082
Adjustments to reconcile net income to net cash flows from operating activities
Net realized (gains) losses	97			2
Amortization of premiums/discounts on fixed maturities	118			155
Amortization of purchased intangibles	76			85
Deferred income taxes	(76		)	(2		)
Unpaid losses and loss expenses	62			(420		)
Unearned premiums	274			111
Future policy benefits	41			58
Insurance and reinsurance balances payable	13			250
Accounts payable, accrued expenses, and other liabilities	(502		)	(724		)
Income taxes payable	266			88
Insurance and reinsurance balances receivable	278			(174		)
Reinsurance recoverable	(97		)	141
Deferred policy acquisition costs	(63		)	(75		)
Other	(205		)	(26		)
Net cash flows from operating activities	1,322			551
Cash flows from investing activities
Purchases of fixed maturities available for sale	(5,561		)	(5,972		)
Purchases of fixed maturities held to maturity	(1		)	(162		)
Purchases of equity securities	(49		)	(55		)
Sales of fixed maturities available for sale	3,287			2,562
Sales of to be announced mortgage-backed securities	6			—
Sales of equity securities	60			40
Maturities and redemptions of fixed maturities available for sale	1,831			1,865
Maturities and redemptions of fixed maturities held to maturity	280			255
Net change in short-term investments	(39		)	731
Net derivative instruments settlements	(358		)	39
Private equity contributions	(410		)	(353		)
Private equity distributions	368			201
Other	(87		)	(32		)
Net cash flows used for investing activities	(673		)	(881		)
Cash flows from financing activities
Dividends paid on Common Shares	(336		)	(330		)
Common Shares repurchased	(367		)	(29		)
Proceeds from issuance of long-term debt	—			2,175
Repayment of long-term debt	—			(300		)
Proceeds from issuance of repurchase agreements	471			408
Repayment of repurchase agreements	(470		)	(404		)
Proceeds from share-based compensation plans	35			34
Policyholder contract deposits	115			118
Policyholder contract withdrawals	(78		)	(105		)
Net cash flows (used for) from financing activities	(630		)	1,567
Effect of foreign currency rate changes on cash and restricted cash	34			25
Net increasein cash and restricted cash	53			1,262
Cash and restricted cash – beginning of period	1,340			851
Cash and restricted cash – end of period	$	1,393		$	2,113
Supplemental cash flow information
Taxes paid	$	14		$	93
Interest paid	$	85		$	82

See accompanying notes to the consolidated financial statements

6

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Unaudited)

Chubb Limited and Subsidiaries

1. General

a) Basis of presentation

Chubb Limited is a holding company incorporated in Zurich, Switzerland. Chubb Limited, through its subsidiaries, provides a broad range of insurance and reinsurance products to insureds worldwide. Chubb operates through the following business segments: North America Commercial P&C Insurance, North America Personal P&C Insurance, North America Agricultural Insurance, Overseas General Insurance, Global Reinsurance, and Life Insurance. Refer to Note 9 for additional information.

The interim unaudited consolidated financial statements, which include the accounts of Chubb Limited and its subsidiaries (collectively, Chubb, we, us, or our), have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) and, in the opinion of management, reflect all adjustments (consisting of normally recurring accruals) necessary for a fair statement of the results and financial position for such periods. All significant intercompany accounts and transactions, including internal reinsurance transactions, have been eliminated.

The results of operations and cash flows for any interim period are not necessarily indicative of the results for the full year. These consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes included in our 2018 Form 10-K.

b) Restricted cash

Restricted cash in the Consolidated balance sheets represents amounts held for the benefit of third parties and is legally or contractually restricted as to withdrawal or usage. Amounts include deposits with U.S. and non-U.S. regulatory authorities, trust funds set up for the benefit of ceding companies, and amounts pledged as collateral to meet financing arrangements.

The following table provides a reconciliation of cash and restricted cash reported within the Consolidated balance sheets that total to the amounts shown in the Consolidated statements of cash flows:

	March 31		December 31
(in millions of U.S. dollars)	2019		2018
Cash	$	1,271	$	1,247
Restricted cash	122		93
Total cash and restricted cash shown in the Consolidated statements of cash flows	$	1,393	$	1,340

c) Goodwill

During the three months endedMarch 31, 2019, Goodwill increased $57 million, primarily reflecting the impact of foreign exchange.

d) Accounting guidance adopted in 2019

Premium Amortization on Purchased Callable Debt Securities

Effective January 1, 2019, we adopted new accounting guidance on "Premium Amortization on Purchased Callable Debt Securities" for bonds held at a premium on a modified retrospective basis. The guidance requires the premium to be amortized to the earliest call date. As a result, we recorded a cumulative effect adjustment to decrease beginning retained earnings by $12 million after-tax ($15 million pre-tax). Securities held at a discount did not require an accounting change.

Lease Accounting

Effective for the quarter ended March 31, 2019, we adopted new lease accounting guidance and elected to utilize a modified retrospective approach which allowed us to initially apply the new lease standard at the adoption date and recognize a cumulative effect adjustment to the opening balance of retained earnings for 2019, with no adjustment to prior periods presented. The cumulative effect adjustment to the opening balance of retained earnings was zero. Our leases consist principally of real estate operating leases that are amortized on a straight-line basis over the term of the lease. The adoption of the updated guidance resulted in our recognizing a right-of-use asset of $608 million, which was recorded within Other assets, and a lease liability of $653 million, which was recorded within Accounts payable, accrued expenses, and other liabilities on the Consolidated balance sheet as well as de-recognizing the liability for deferred rent that was required under the previous guidance. The adoption of the new guidance did not have a material effect on our results of operations, financial condition or liquidity.

Refer to the2018 Form 10-K for information on accounting guidance not yet adopted.

7

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

2. Investments

a) Fixed maturities

March 31, 2019	Amortized Cost		Gross Unrealized Appreciation		Gross Unrealized Depreciation			Fair Value		OTTI Recognized in AOCI
(in millions of U.S. dollars)
Available for sale
U.S. Treasury and agency	$	3,760	$	50	$	(19	)	$	3,791	$	—
Foreign	21,796		658		(112		)	22,342		—
Corporate securities	27,519		476		(170		)	27,825		(5		)
Mortgage-backed securities	16,369		173		(112		)	16,430		(1		)
States, municipalities, and political subdivisions	10,180		123		(28		)	10,275		—
	$	79,624	$	1,480	$	(441	)	$	80,663	$	(6	)
Held to maturity
U.S. Treasury and agency	$	1,144	$	11	$	(3	)	$	1,152	$	—
Foreign	1,503		34		(3		)	1,534		—
Corporate securities	2,543		30		(34		)	2,539		—
Mortgage-backed securities	2,484		16		(6		)	2,494		—
States, municipalities, and political subdivisions	5,462		67		(8		)	5,521		—
	$	13,136	$	158	$	(54	)	$	13,240	$	—

December 31, 2018	Amortized Cost		Gross Unrealized Appreciation		Gross Unrealized Depreciation			Fair Value		OTTI Recognized in AOCI
(in millions of U.S. dollars)
Available for sale
U.S. Treasury and agency	$	4,158	$	30	$	(43	)	$	4,145	$	—
Foreign	21,370		395		(349		)	21,416		—
Corporate securities	27,183		150		(750		)	26,583		(6		)
Mortgage-backed securities	15,758		66		(284		)	15,540		(1		)
States, municipalities, and political subdivisions	10,854		49		(117		)	10,786		—
	$	79,323	$	690	$	(1,543	)	$	78,470	$	(7	)
Held to maturity
U.S. Treasury and agency	$	1,185	$	8	$	(11	)	$	1,182	$	—
Foreign	1,549		11		(18		)	1,542		—
Corporate securities	2,601		11		(104		)	2,508		—
Mortgage-backed securities	2,524		5		(43		)	2,486		—
States, municipalities, and political subdivisions	5,576		16		(51		)	5,541		—
	$	13,435	$	51	$	(227	)	$	13,259	$	—

As discussed in Note 2b), if a credit loss is incurred on an impaired fixed maturity, an OTTI is considered to have occurred and the portion of the impairment not related to credit losses (non-credit OTTI) is recognized in OCI. Included in the “OTTI Recognized in AOCI” columns above are the cumulative amounts of non-credit OTTI recognized in OCI adjusted for subsequent sales, maturities, and redemptions. OTTI recognized in AOCI does not include the impact of subsequent changes in fair value of the related securities. In periods subsequent to a recognition of OTTI in OCI, changes in the fair value of the related fixed maturities are reflected in Net unrealized appreciation on investments in the Consolidated statements of shareholders’ equity. For the three months endedMarch 31, 2019 and 2018, $9 million of net unrealized appreciation and $4 million of net unrealized depreciation, respectively, related to such securities are included in OCI. At March 31, 2019 and December 31,

8

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

2018, AOCI included cumulative net unrealized appreciation of $3 million and $1 million, respectively, related to securities remaining in the investment portfolio for which a non-credit OTTI was recognized.

Mortgage-backed securities (MBS) issued by U.S. government agencies are combined with all other to be announced mortgage-backed securities (TBAs) held (refer to Note 5 b) (iv)) and are included in the category, “Mortgage-backed securities”. Approximately 82 percent and81 percent of the total mortgage-backed securities at March 31, 2019 and December 31, 2018, respectively, are represented by investments in U.S. government agency bonds. The remainder of the mortgage exposure consists of collateralized mortgage obligations and non-government mortgage-backed securities, the majority of which provide a planned structure for principal and interest payments and carry a rating of AAA by the major credit rating agencies.

The following table presents fixed maturities by contractual maturity:

			March 31				December 31
			2019				2018
(in millions of U.S. dollars)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Available for sale
Due in 1 year or less	$	3,776	$	3,785	$	3,569	$	3,568
Due after 1 year through 5 years	27,308		27,593		27,134		27,005
Due after 5 years through 10 years	23,367		23,690		24,095		23,543
Due after 10 years	8,804		9,165		8,767		8,814
	63,255		64,233		63,565		62,930
Mortgage-backed securities	16,369		16,430		15,758		15,540
	$	79,624	$	80,663	$	79,323	$	78,470
Held to maturity
Due in 1 year or less	$	614	$	616	$	536	$	537
Due after 1 year through 5 years	3,111		3,125		3,122		3,106
Due after 5 years through 10 years	4,246		4,287		4,468		4,407
Due after 10 years	2,681		2,718		2,785		2,723
	10,652		10,746		10,911		10,773
Mortgage-backed securities	2,484		2,494		2,524		2,486
	$	13,136	$	13,240	$	13,435	$	13,259

Expected maturities could differ from contractual maturities because borrowers may have the right to call or prepay obligations, with or without call or prepayment penalties. 

b) Net realized gains (losses)

In accordance with guidance related to the recognition and presentation of OTTI, when an impairment related to a fixed maturity has occurred, OTTI is required to be recorded in Net income if management has the intent to sell the security or it is more likely than not that we will be required to sell the security before the recovery of its amortized cost. Further, in cases where we do not intend to sell the security and it is more likely than not that we will not be required to sell the security, we must evaluate the security to determine the portion of the impairment, if any, related to credit losses. If a credit loss is incurred, an OTTI is considered to have occurred and any portion of the OTTI related to credit losses must be reflected in Net income while the portion of OTTI related to all other factors is recognized in OCI. For fixed maturities held to maturity, OTTI recognized in OCI is accreted from AOCI to the amortized cost of the fixed maturity prospectively over the remaining term of the securities.

Each quarter, securities in an unrealized loss position (impaired securities), including fixed maturities and securities lending collateral are reviewed to identify impaired securities to be specifically evaluated for a potential OTTI.

Evaluation of potential credit losses related to fixed maturities

We review each fixed maturity in an unrealized loss position to assess whether the security is a candidate for credit loss. Specifically, we consider credit rating, market price, and issuer-specific financial information, among other factors, to assess the likelihood of collection of all principal and interest as contractually due. Securities, for which we determine that credit loss is likely, are subjected to further analysis to estimate the credit loss recognized in Net income, if any. In general, credit loss

9

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

recognized in Net income equals the difference between the security’s amortized cost and the net present value of its projected future cash flows discounted at the effective interest rate implicit in the debt security. All significant assumptions used in determining credit losses are subject to change as market conditions evolve.

Corporate securities

Projected cash flows for corporate securities (principally senior unsecured bonds) are driven primarily by assumptions regarding probability of default and also the timing and amount of recoveries associated with defaults. Chubb developed projected cash flows for corporate securities using market observable data, issuer-specific information, and credit ratings. We use historical default data by Moody’s Investors Service (Moody’s) rating category to calculate a 1-in-100 year probability of default, which results in a default assumption in excess of the historical mean default rate. Consistent with management's approach, Chubb assumed a 32 percent recovery rate (the par value of a defaulted security that will be recovered) across all rating categories rather than using Moody's historical mean recovery rate of 42 percent. We believe that use of a default assumption in excess of the historical mean is conservative.

For the three months endedMarch 31, 2019 and 2018, credit losses recognized in Net income for corporate securities were $6 million and nil, respectively.

Mortgage-backed securities

For mortgage-backed securities, credit impairment is assessed using a cash flow model that estimates the cash flows on the underlying mortgages, using the security-specific collateral and transaction structure. The model estimates cash flows from the underlying mortgage loans and distributes those cash flows to various tranches of securities, considering the transaction structure and any subordination and credit enhancements that exist in that structure. The cash flow model incorporates actual cash flows on the mortgage-backed securities through the current period and then projects the remaining cash flows using a number of assumptions, including default rates, prepayment rates, and loss severity rates (the par value of a defaulted security that will not be recovered) on foreclosed properties.

For the three months endedMarch 31, 2019 and 2018, there were no credit losses recognized in Net income for mortgage-backed securities.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

The following table presents the components of Net realized gains (losses):

	Three Months Ended
	March 31
(in millions of U.S. dollars)	2019			2018
Fixed maturities:
OTTI on fixed maturities, gross and net	$	(13	)	$	(1	)
Gross realized gains excluding OTTI	27			66
Gross realized losses excluding OTTI	(58		)	(88		)
Total fixed maturities	(44		)	(23		)
Equity securities:
Gross realized gains excluding OTTI	64			10
Gross realized losses excluding OTTI	(6		)	(21		)
Total equity securities	58			(11		)
Other investments	(44		)	29
Foreign exchange gains (losses)	13			(77		)
Investment and embedded derivative instruments	(130		)	17
Fair value adjustments on insurance derivative	114			38
S&P futures	(63		)	22
Other derivative instruments	(1		)	2
Other	—			1
Net realized gains (losses) (pre-tax)	$	(97	)	$	(2	)

The following table presents a roll-forward of pre-tax credit losses related to fixed maturities for which a portion of OTTI was recognized in OCI:

	Three Months Ended
	March 31
(in millions of U.S. dollars)	2019			2018
Balance of credit losses related to securities still held – beginning of period	$	34		$	22
Additions where no OTTI was previously recorded	6			—
Reductions for securities sold during the period	(8		)	(7		)
Balance of credit losses related to securities still held – end of period	$	32		$	15

c) Equity securities and Other investments

The following table presents realized gains and losses from equity securities and other investments, including both sales of securities and unrealized gains and losses from changes in fair value:

									Three Months Ended
									March 31
	2019								2018
(in millions of U.S. dollars)	Equity Securities		Other Investments			Total			Equity Securities			Other Investments		Total
Net gains (losses) recognized during the period	$	58	$	(44	)	$	14		$	(11	)	$	29	$	18
Less: Net gains (losses) recognized from sales of securities	1		(2		)	(1		)	10			—		10
Unrealized gains (losses) recognized for securities still held at reporting date	$	57	$	(42	)	$	15		$	(21	)	$	29	$	8

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

d) Gross unrealized loss

At March 31, 2019, there were 10,095 fixed maturities out of a total of 30,335 fixed maturities in an unrealized loss position. The largest single unrealized loss in the fixed maturities was $6 million. Fixed maturities in an unrealized loss position at March 31, 2019, comprised both investment grade and below investment grade securities for which fair value declined primarily due to widening credit spreads since the date of purchase.

The following tables present, for all securities in an unrealized loss position (including securities on loan), the aggregate fair value and gross unrealized loss by length of time the security has continuously been in an unrealized loss position:

	0 – 12 Months					Over 12 Months					Total
March 31, 2019	Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss
(in millions of U.S. dollars)
U.S. Treasury and agency	$	68	$	—		$	2,298	$	(22	)	$	2,366	$	(22	)
Foreign	1,346		(26		)	4,228		(89		)	5,574		(115		)
Corporate securities	3,649		(62		)	6,206		(142		)	9,855		(204		)
Mortgage-backed securities	388		(1		)	8,974		(117		)	9,362		(118		)
States, municipalities, and political subdivisions	93		—			4,867		(36		)	4,960		(36		)
Total fixed maturities	$	5,544	$	(89	)	$	26,573	$	(406	)	$	32,117	$	(495	)

	0 – 12 Months					Over 12 Months					Total
December 31, 2018	Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss
(in millions of U.S. dollars)
U.S. Treasury and agency	$	523	$	(4	)	$	2,859	$	(50	)	$	3,382	$	(54	)
Foreign	6,764		(208		)	5,349		(159		)	12,113		(367		)
Corporate securities	16,538		(599		)	4,873		(255		)	21,411		(854		)
Mortgage-backed securities	6,103		(98		)	6,913		(229		)	13,016		(327		)
States, municipalities, and political subdivisions	5,024		(44		)	7,768		(124		)	12,792		(168		)
Total fixed maturities	$	34,952	$	(953	)	$	27,762	$	(817	)	$	62,714	$	(1,770	)

e) Restricted assets

Chubb is required to maintain assets on deposit with various regulatory authorities to support its insurance and reinsurance operations. These requirements are generally promulgated in the statutory regulations of the individual jurisdictions. The assets on deposit are available to settle insurance and reinsurance liabilities. Chubb is also required to restrict assets pledged under repurchase agreements, which represent Chubb's agreement to sell securities and repurchase them at a future date for a predetermined price. We use trust funds in certain large reinsurance transactions where the trust funds are set up for the benefit of the ceding companies and generally take the place of letter of credit (LOC) requirements. We have investments in segregated portfolios primarily to provide collateral or guarantees for LOC and derivative transactions. Included in restricted assets at March 31, 2019 and December 31, 2018 are investments, primarily fixed maturities, totaling $22.0 billion and $21.0 billion, respectively, and cash of $122 million and $93 million, respectively.

The following table presents the components of restricted assets:

	March 31		December 31
(in millions of U.S. dollars)	2019		2018
Trust funds	$	13,943	$	13,988
Deposits with U.S. regulatory authorities	2,904		2,405
Deposits with non-U.S. regulatory authorities	2,851		2,531
Assets pledged under repurchase agreements	1,478		1,468
Other pledged assets	942		692
Total	$	22,118	$	21,084

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

3. Fair value measurements

a) Fair value hierarchy

Fair value of financial assets and financial liabilities is estimated based on the framework established in the fair value accounting guidance. The guidance defines fair value as the price to sell an asset or transfer a liability (an exit price) in an orderly transaction between market participants and establishes a three-level valuation hierarchy based on the reliability of the inputs. The fair value hierarchy gives the highest priority to quoted prices in active markets and the lowest priority to unobservable data.

The three levels of the hierarchy are as follows:

• Level 1 – Unadjusted quoted prices for identical assets or liabilities in active markets;

• Level 2 – Includes, among other items, inputs other than quoted prices that are observable for the asset or liability such as

interest rates and yield curves, quoted prices for similar assets and liabilities in active markets, and quoted prices for identical or similar assets and liabilities in markets that are not active; and

• Level 3 – Inputs that are unobservable and reflect management’s judgments about assumptions that market participants

would use in pricing an asset or liability.

We categorize financial instruments within the valuation hierarchy at the balance sheet date based upon the lowest level of inputs that are significant to the fair value measurement.

We use pricing services to obtain fair value measurements for the majority of our investment securities. Based on management’s understanding of the methodologies used, these pricing services only produce an estimate of fair value if there is observable market information that would allow them to make a fair value estimate. Based on our understanding of the market inputs used by the pricing services, all applicable investments have been valued in accordance with GAAP. We do not adjust prices obtained from pricing services. The following is a description of the valuation techniques and inputs used to determine fair values for financial instruments carried at fair value, as well as the general classification of such financial instruments pursuant to the valuation hierarchy.

Fixed maturities

We use pricing services to estimate fair value measurements for the majority of our fixed maturities. The pricing services use market quotations for fixed maturities that have quoted prices in active markets; such securities are classified within Level 1. For fixed maturities other than U.S. Treasury securities that generally do not trade on a daily basis, the pricing services prepare estimates of fair value measurements using their pricing applications, which include available relevant market information, benchmark curves, benchmarking of like securities, sector groupings, and matrix pricing. Additional valuation factors that can be taken into account are nominal spreads, dollar basis, and liquidity adjustments. The pricing services evaluate each asset class based on relevant market and credit information, perceived market movements, and sector news. The market inputs used in the pricing evaluation, listed in the approximate order of priority include: benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, reference data, and industry and economic events. The extent of the use of each input is dependent on the asset class and the market conditions. Given the asset class, the priority of the use of inputs may change, or some market inputs may not be relevant. Additionally, fixed maturities valuation is more subjective when markets are less liquid due to the lack of market based inputs (i.e., stale pricing), which may increase the potential that an investment's estimated fair value is not reflective of the price at which an actual transaction would occur. The overwhelming majority of fixed maturities are classified within Level 2 because the most significant inputs used in the pricing techniques are observable. For a small number of fixed maturities, we obtain a single broker quote (typically from a market maker). Due to the disclaimers on the quotes that indicate that the price is indicative only, we include these fair value estimates in Level 3. 

Equity securities

Equity securities with active markets are classified within Level 1 as fair values are based on quoted market prices. For equity securities in markets which are less active, fair values are based on market valuations and are classified within Level 2. Equity securities for which pricing is unobservable are classified within Level 3.

Short-term investments

Short-term investments, which comprise securities due to mature within one year of the date of purchase that are traded in active markets, are classified within Level 1 as fair values are based on quoted market prices. Securities such as commercial paper and discount notes are classified within Level 2 because these securities are typically not actively traded due to their

13

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

approaching maturity and, as such, their cost approximates fair value. Short-term investments for which pricing is unobservable are classified within Level 3.

Other investments

Fair values for the majority of Other investments including investments in partially-owned investment companies, investment funds, and limited partnerships are based on their respective net asset values or equivalent (NAV) and are excluded from the fair value hierarchy table below. Certain of our long-duration contracts are supported by assets that do not qualify for separate account reporting under GAAP. These assets comprise mutual funds classified within Level 1 in the valuation hierarchy on the same basis as other equity securities traded in active markets. Other investments also include equity securities classified within Level 1, and fixed maturities, classified within Level 2, held in rabbi trusts maintained by Chubb for deferred compensation plans and supplemental retirement plans and are classified within the valuation hierarchy on the same basis as other equity securities and fixed maturities. Other investments for which pricing is unobservable are classified within Level 3.

Securities lending collateral

The underlying assets included in Securities lending collateral in the Consolidated balance sheets are fixed maturities which are classified in the valuation hierarchy on the same basis as other fixed maturities. Excluded from the valuation hierarchy is the corresponding liability related to Chubb’s obligation to return the collateral plus interest as it is reported at contract value and not fair value in the Consolidated balance sheets.

Investment derivative instruments

Actively traded investment derivative instruments, including futures, options, and forward contracts are classified within Level 1 as fair values are based on quoted market prices. The fair value of cross-currency swaps and interest rate swaps is based on market valuations and is classified within Level 2. Investment derivative instruments are recorded in either Other assets or Accounts payable, accrued expenses, and other liabilities in the Consolidated balance sheets.

Other derivative instruments

We maintain positions in exchange-traded equity futures contracts designed to limit exposure to a severe equity market decline, which would cause an increase in expected claims and, therefore, an increase in reserves for our guaranteed minimum death benefits (GMDB) and guaranteed living benefits (GLB) reinsurance business. Our positions in exchange-traded equity futures contracts are classified within Level 1. The fair value of the majority of the remaining positions in other derivative instruments is based on significant observable inputs including equity security and interest rate indices. Accordingly, these are classified within Level 2. Other derivative instruments based on unobservable inputs are classified within Level 3. Other derivative instruments are recorded in either Other assets or Accounts payable, accrued expenses, and other liabilities in the Consolidated balance sheets.

Separate account assets

Separate account assets represent segregated funds where investment risks are borne by the customers, except to the extent of certain guarantees made by Chubb. Separate account assets comprise mutual funds classified within Level 1 in the valuation hierarchy on the same basis as other equity securities traded in active markets. Separate account assets also include fixed maturities classified within Level 2 because the most significant inputs used in the pricing techniques are observable. Excluded from the valuation hierarchy are the corresponding liabilities as they are reported at contract value and not fair value in the Consolidated balance sheets. Separate account assets are recorded in Other assets in the Consolidated balance sheets.

Guaranteed living benefits

The GLB arises from life reinsurance programs covering living benefit guarantees whereby we assume the risk of guaranteed minimum income benefits (GMIB) associated with variable annuity contracts. GLB’s are recorded in Accounts payable, accrued expenses, and other liabilities and Future policy benefits in the Consolidated balance sheets. For GLB reinsurance, Chubb estimates fair value using an internal valuation model which includes current market information and estimates of policyholder behavior. All of the treaties contain claim limits, which are factored into the valuation model. The fair value depends on a number of factors, including interest rates, equity markets, credit risk, current account value, market volatility, expected annuitization rates and other policyholder behavior, and changes in policyholder mortality.

The most significant policyholder behavior assumptions include lapse rates and the GMIB annuitization rates. Assumptions regarding lapse rates and GMIB annuitization rates differ by treaty, but the underlying methodologies to determine rates applied to each treaty are comparable.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

A lapse rate is the percentage of in-force policies surrendered in a given calendar year. All else equal, as lapse rates increase, ultimate claim payments will decrease.

The GMIB annuitization rate is the percentage of policies for which the policyholder will elect to annuitize using the guaranteed benefit provided under the GMIB. All else equal, as GMIB annuitization rates increase, ultimate claim payments will increase, subject to treaty claim limits.

The effect of changes in key market factors on assumed lapse and annuitization rates reflect emerging trends using data available from cedants. For treaties with limited experience, rates are established in line with data received from other ceding companies adjusted, as appropriate, with industry estimates. The model and related assumptions are regularly re-evaluated by management and enhanced, as appropriate, based upon additional experience obtained related to policyholder behavior and availability of updated information such as market conditions, market participant assumptions, and demographics of in-force annuities. Because of the significant use of unobservable inputs including policyholder behavior, GLB reinsurance is classified within Level 3.For the three months ended March 31, 2019 and 2018, no material technical refinements were made to the model. For detailed information on our lapse and annuitization rate assumptions, refer to Note 3 to the Consolidated Financial Statements of our 2018 Form 10-K.

Financial instruments measured at fair value on a recurring basis, by valuation hierarchy

March 31, 2019	Level 1		Level 2		Level 3		Total
(in millions of U.S. dollars)
Assets:
Fixed maturities available for sale
U.S. Treasury and agency	$	3,168	$	623	$	—	$	3,791
Foreign	—		21,982		360		22,342
Corporate securities	—		26,483		1,342		27,825
Mortgage-backed securities	—		16,352		78		16,430
States, municipalities, and political subdivisions	—		10,275		—		10,275
	3,168		75,715		1,780		80,663
Equity securities	766		—		55		821
Short-term investments	1,785		1,293		—		3,078
Other investments (1)	411		342		11		764
Securities lending collateral	—		1,861		—		1,861
Investment derivative instruments	15		—		—		15
Other derivative instruments	7		—		—		7
Separate account assets	2,991		139		—		3,130
Total assets measured at fair value (1)	$	9,143	$	79,350	$	1,846	$	90,339
Liabilities:
Investment derivative instruments	$	52	$	195	$	—	$	247
Other derivative instruments	12		—		—		12
GLB (2)	—		—		338		338
Total liabilities measured at fair value	$	64	$	195	$	338	$	597

⁽¹⁾  Excluded from the table above are partially-owned investments, investment funds, and limited partnerships of $4,464 million and other investments of $91 million at March 31, 2019 measured using NAV as a practical expedient.

⁽²⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the Consolidated balance sheets.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

December 31, 2018	Level 1		Level 2		Level 3		Total
(in millions of U.S. dollars)
Assets:
Fixed maturities available for sale
U.S. Treasury and agency	$	3,400	$	745	$	—	$	4,145
Foreign	—		21,071		345		21,416
Corporate securities	—		25,284		1,299		26,583
Mortgage-backed securities	—		15,479		61		15,540
States, municipalities, and political subdivisions	—		10,786		—		10,786
	3,400		73,365		1,705		78,470
Equity securities	713		—		57		770
Short-term investments	1,575		1,440		1		3,016
Other investments (1)	381		303		11		695
Securities lending collateral	—		1,926		—		1,926
Investment derivative instruments	28		—		—		28
Other derivative instruments	25		—		—		25
Separate account assets	2,686		137		—		2,823
Total assets measured at fair value (1)	$	8,808	$	77,171	$	1,774	$	87,753
Liabilities:
Investment derivative instruments	$	38	$	115	$	—	$	153
GLB (2)	—		—		452		452
Total liabilities measured at fair value	$	38	$	115	$	452	$	605

⁽¹⁾  Excluded from the table above are partially-owned investments, investment funds, and limited partnerships of $4,244 million and other investments of $95 million at December 31, 2018 measured using NAV as a practical expedient.

⁽²⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the Consolidated balance sheets.

Fair value of alternative investments

Alternative investments include investment funds, limited partnerships, and partially-owned investment companies measured at fair value using NAV as a practical expedient. The following table presents, by investment category, the expected liquidation period, fair value, and maximum future funding commitments of alternative investments:

				March 31				December 31
	Expected Liquidation Period of Underlying Assets			2019				2018
(in millions of U.S. dollars)		Fair Value		Maximum Future Funding Commitments		Fair Value		Maximum Future Funding Commitments
Financial	2 to 9 Years	$	591	$	188	$	596	$	193
Real Assets	2 to 11 Years	762		449		704		362
Distressed	2 to 7 Years	263		98		296		105
Private Credit	3 to 8 Years	134		291		147		310
Traditional	2 to 14 Years	2,331		2,573		2,362		2,735
Vintage	1 to 2 Years	125		43		56		—
Investment funds	Not Applicable	258		—		83		—
		$	4,464	$	3,642	$	4,244	$	3,705

Included in all categories in the above table, except for Investment funds, are investments for which Chubb will never have the contractual option to redeem but receives distributions based on the liquidation of the underlying assets. Further, for all categories except for Investment funds, Chubb does not have the ability to sell or transfer the investments without the consent from the general partner of individual funds.

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Chubb Limited and Subsidiaries

Investment Category:	Consists of investments in private equity funds:
Financial	targeting financial services companies, such as financial institutions and insurance services worldwide
Real Assets	targeting investments related to hard, physical assets, such as real estate, infrastructure and natural resources
Distressed	targeting distressed corporate debt/credit and equity opportunities in the U.S.
Private Credit	targeting privately originated corporate debt investments, including senior secured loans and subordinated bonds
Traditional	employing traditional private equity investment strategies, such as buyout and growth equity globally
Vintage	funds where the initial fund term has expired

Investment funds

Chubb’s investment funds employ various investment strategies, such as long/short equity and arbitrage/distressed. Included in this category are investments for which Chubb has the option to redeem at agreed upon value as described in each investment fund’s subscription agreement. Depending on the terms of the various subscription agreements, investment fund investments may be redeemed monthly, quarterly, semi-annually, or annually. If Chubb wishes to redeem an investment fund investment, it must first determine if the investment fund is still in a lock-up period (a time when Chubb cannot redeem its investment so that the investment fund manager has time to build the portfolio). If the investment fund is no longer in its lock-up period, Chubb must then notify the investment fund manager of its intention to redeem by the notification date prescribed by the subscription agreement. Subsequent to notification, the investment fund can redeem Chubb’s investment within several months of the notification. Notice periods for redemption of the investment funds range between 5 and 120 days. Chubb can redeem its investment funds without consent from the investment fund managers.

Level 3 financial instruments

The following table presents the significant unobservable inputs used in the Level 3 liability valuations. Excluded from the table below are inputs used to determine the fair value of Level 3 assets which are based on single broker quotes and contain no quantitative unobservable inputs developed by management. The majority of our fixed maturities classified as Level 3 used external pricing when markets are less liquid due to the lack of market inputs (i.e., stale pricing, broker quotes).

(in millions of U.S. dollars, except for percentages)	Fair Value				Valuation Technique	Significant Unobservable Inputs	Ranges
	March 31, 2019		December 31, 2018
GLB (1)	$	338	$	452	Actuarial model	Lapse rate	3% – 32%
						Annuitization rate	0% – 42%

⁽¹⁾  Discussion of the most significant inputs used in the fair value measurement of GLB and the sensitivity of those assumptions is included within Note 3 a) Guaranteed living benefits.

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Chubb Limited and Subsidiaries

The following tables present a reconciliation of the beginning and ending balances of financial instruments measured at fair value using significant unobservable inputs (Level 3):

	Assets																	Liabilities
Three Months Ended	Available-for-Sale Debt Securities									Equity securities			Short-term investments			Other investments			GLB (1)
March 31, 2019	Foreign			Corporate securities			MBS
(in millions of U.S. dollars)
Balance – beginning of period	$	345		$	1,299		$	61		$	57		$	1		$	11		$	452
Transfers into Level 3	3			5			—			—			—			—			—
Transfers out of Level 3	(15		)	—			—			—			—			—			—
Change in Net Unrealized Gains (Losses) included in OCI, including foreign exchange	6			4			—			1			—			—			—
Net Realized Gains/Losses	(1		)	1			—			(2		)	—			—			(114		)
Purchases	53			128			18			9			—			—			—
Sales	(5		)	(37		)	—			(10		)	—			—			—
Settlements	(26		)	(58		)	(1		)	—			(1		)	—			—
Balance – end of period	$	360		$	1,342		$	78		$	55		$	—		$	11		$	338
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date	$	—		$	—		$	—		$	(1	)	$	—		$	—		$	(114	)

⁽¹⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the Consolidated balance sheets. The liability for GLB reinsurance was $741 million at March 31, 2019, and $861 million at December 31, 2018, which includes a fair value derivative adjustment of $338 million and 452 million, respectively.

	Assets																		Liabilities
Three Months Ended	Available-for-Sale Debt Securities								Equity securities		Short-term investments			Other investments			Other derivative instruments		GLB (2)
March 31, 2018	Foreign			Corporate securities (1)			MBS
(in millions of U.S. dollars)
Balance – beginning of period	$	93		$	1,037		$	78	$	44	$	—		$	263		$	2	$	204
Transfers into Level 3	7			—			1		—		5			—			—		—
Transfers out of Level 3	—			(10		)	—		—		—			—			—		—
Change in Net Unrealized Gains (Losses) included in OCI, including foreign exchange	9			(3		)	—		1		—			2			—		—
Net Realized Gains/Losses	—			—			—		2		—			—			—		(37		)
Purchases	87			139			4		17		8			14			—		—
Sales	(19		)	(51		)	—		—		—			—			—		—
Settlements	(1		)	(39		)	—		—		(1		)	(9		)	—		—
Balance – end of period	$	176		$	1,073		$	83	$	64	$	12		$	270		$	2	$	167
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date	$	—		$	—		$	—	$	—	$	—		$	—		$	—	$	(37	)

⁽¹⁾  Purchases in Level 3 primarily consist of privately-placed fixed income securities.

⁽²⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the Consolidated balance sheets. The liability for GLB reinsurance was $529 million at March 31, 2018, and $550 million at December 31, 2017, which includes a fair value derivative adjustment of $167 million and $204 million, respectively.

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Chubb Limited and Subsidiaries

b) Financial instruments disclosed, but not measured, at fair value

Chubb uses various financial instruments in the normal course of its business. Our insurance contracts are excluded from fair value of financial instruments accounting guidance, and therefore, are not included in the amounts discussed below.

The carrying values of cash, other assets, other liabilities, and other financial instruments not included below approximated their fair values.

Refer to the 2018 Form 10-K for information on the fair value methods and assumptions for investments in partially-owned insurance companies, short-term and long-term debt, repurchase agreements, and trust-preferred securities.

The following tables present fair value, by valuation hierarchy, and carrying value of the financial instruments not measured at fair value:

March 31, 2019	Fair Value								Carrying Value
(in millions of U.S. dollars)	Level 1		Level 2		Level 3		Total
Assets:
Fixed maturities held to maturity
U.S. Treasury and agency	$	1,098	$	54	$	—	$	1,152	$	1,144
Foreign	—		1,534		—		1,534		1,503
Corporate securities	—		2,509		30		2,539		2,543
Mortgage-backed securities	—		2,494		—		2,494		2,484
States, municipalities, and political subdivisions	—		5,521		—		5,521		5,462
Total assets	$	1,098	$	12,112	$	30	$	13,240	$	13,136
Liabilities:
Repurchase agreements	$	—	$	1,419	$	—	$	1,419	$	1,419
Short-term debt	—		512		—		512		509
Long-term debt	—		12,719		—		12,719		12,071
Trust preferred securities	—		425		—		425		308
Total liabilities	$	—	$	15,075	$	—	$	15,075	$	14,307

December 31, 2018	Fair Value								Carrying Value
(in millions of U.S. dollars)	Level 1		Level 2		Level 3		Total
Assets:
Fixed maturities held to maturity
U.S. Treasury and agency	$	1,128	$	54	$	—	$	1,182	$	1,185
Foreign	—		1,542		—		1,542		1,549
Corporate securities	—		2,477		31		2,508		2,601
Mortgage-backed securities	—		2,486		—		2,486		2,524
States, municipalities, and political subdivisions	—		5,541		—		5,541		5,576
Total assets	$	1,128	$	12,100	$	31	$	13,259	$	13,435
Liabilities:
Repurchase agreements	$	—	$	1,418	$	—	$	1,418	$	1,418
Short-term debt	—		516		—		516		509
Long-term debt	—		12,181		—		12,181		12,087
Trust preferred securities	—		409		—		409		308
Total liabilities	$	—	$	14,524	$	—	$	14,524	$	14,322

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

4. Unpaid losses and loss expenses

The following table presents a reconciliation of beginning and ending Unpaid losses and loss expenses:

	Three Months Ended March 31
(in millions of U.S. dollars)	2019			2018
Gross unpaid losses and loss expenses – beginning of period	$	62,960		$	63,179
Reinsurance recoverable on unpaid losses - beginning of period (1)	(14,689		)	(14,014		)
Net unpaid losses and loss expenses – beginning of period	48,271			49,165
Net losses and loss expenses incurred in respect of losses occurring in:
Current year	4,326			4,358
Prior years (2)	(228		)	(256		)
Total	4,098			4,102
Net losses and loss expenses paid in respect of losses occurring in:
Current year	785			809
Prior years	3,234			3,433
Total	4,019			4,242
Foreign currency revaluation and other	86			292
Net unpaid losses and loss expenses – end of period	48,436			49,317
Reinsurance recoverable on unpaid losses (1)	14,707			13,822
Gross unpaid losses and loss expenses – end of period	$	63,143		$	63,139

⁽¹⁾  Net of provision for uncollectible reinsurance.

⁽²⁾  Relates to prior period loss reserve development only and excludes prior period development related to reinstatement premiums, expense adjustments and earned premiums totaling $24 million and $47 million for the three months ended March 31, 2019 and 2018, respectively.

Gross and net unpaid losses and loss expenses increased slightly in the quarter as the underlying reserve increase of $557 million was mostly offset by the favorable impact of prior period development and catastrophic and crop insurance payments in the quarter.

Prior Period Development

Prior period development (PPD) arises from changes to loss estimates recognized in the current year that relate to loss events that occurred in previous calendar years and excludes the effect of losses from the development of earned premium from previous accident years. Long-tail lines include lines such as workers' compensation, general liability, and professional liability; while short-tail lines include lines such as most property lines, energy, personal accident, and agriculture.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

The following table summarizes (favorable) and adverse PPD by segment.

	Three Months Ended March 31
(in millions of U.S. dollars)	Long-tail			Short-tail			Total
2019
North America Commercial P&C Insurance	$	(65	)	$	(66	)	$	(131	)
North America Personal P&C Insurance	—			(10		)	(10		)
North America Agricultural Insurance	—			(61		)	(61		)
Overseas General Insurance	—			(4		)	(4		)
Global Reinsurance	(1		)	(7		)	(8		)
Corporate	10			—			10
Total	$	(56	)	$	(148	)	$	(204	)
2018
North America Commercial P&C Insurance	$	8		$	(109	)	$	(101	)
North America Personal P&C Insurance	—			(6		)	(6		)
North America Agricultural Insurance	—			(76		)	(76		)
Overseas General Insurance	—			(22		)	(22		)
Global Reinsurance	—			(14		)	(14		)
Corporate	10			—			10
Total	$	18		$	(227	)	$	(209	)

Significant prior period movements by segment, principally driven by reserve reviews completed during each respective period, are discussed in more detail below. The remaining net development for long-tail lines and short-tail business for each segment and Corporate comprises numerous favorable and adverse movements across a number of lines and accident years, none of which is significant individually or in the aggregate.

North America Commercial P&C Insurance

2019

For the three months ended March 31, 2019, net favorable PPD was $131 million, which was the net result of several underlying favorable and adverse movements, and was driven by the following principal changes:

• Net favorable development of $65 million in long-tail business, primarily from:

• Net favorable development of $57 million in professional liability (errors & omissions and cyber), mainly in the 2015 and prior accident years where case activity was less than expected, partially offset by adverse development in the 2016 accident year, which was driven by several large adverse claim developments;

• Net favorable development of $31 million in commercial excess and umbrella portfolios, driven by the 2013 and prior accident years, where case emergence was less than expected and greater weight was given to experience-based methods; this was partially offset by higher than expected claim activity in the 2015, 2016, and 2018 accident years which led to reserve strengthening in those years;

• Net favorable development of $30 million in our construction workers' compensation lines, impacting accident years 2015 and prior, and was driven by both lower than expected reported development and related favorable updates to development patterns used in our loss projection methods;

• Net adverse development of $50 million from the aggregation of general liability and automobile liability coverages within construction and wholesale portfolios, mainly impacting the 2013 through 2018 accident years, and largely the result of higher than expected reported loss development; and

• The remaining $3 million of adverse development was due to several underlying favorable and adverse movements, none of which were significant individually or in the aggregate.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

• Net favorable development of $66 million in short-tail business, primarily from:

• Net favorable development of $49 million in surety business, mainly in the 2017 accident year, driven by lower than expected reported loss activity; and

• Net favorable development of $17 million was due to several underlying favorable and adverse movements, mainly driven by favorable development in A&H lines, primarily in accident years 2015 through 2017.

2018

For the three months ended March 31, 2018, net favorable PPD was $101 million, which was the net result of several underlying favorable and adverse movements, and was driven by the following principal changes:

• Net adverse development of $8 million in long-tail business, primarily from:

• Net favorable development of $29 million in commercial excess and umbrella portfolios, driven by the 2012 and prior accident years where the cumulative emergence over time has been less than expected overall and an increase in weighting towards experience-based methods, partly offset by several large settlements; additionally there was adverse claim activity in the 2014 and 2015 accident years which led to reserve strengthening in those years;

• Net favorable development of $3 million on several lines of business due to favorable claim development on the 2017 natural catastrophes; and

• Net adverse development of $40 million, mainly in 2015, 2016 and some older accident years, partially offset by favorable development in other periods, particularly in the 2014 accident year. This net adverse development consisted of several underlying favorable and adverse movements by portfolio, principally including $16 million of adverse development in wholesale general liability lines.

• Net favorable development of $109 million in short-tail business, primarily from:

• Net favorable development of $75 million in commercial property and marine businesses due to favorable claim development on the 2017 natural catastrophes; and

• Net favorable development of $34 million, principally including $19 million in surety business. The remainder was due to several underlying favorable and adverse movements, none of which were significant individually or in the aggregate.

North America Personal P&C Insurance

2019

For the three months ended March 31, 2019, net favorable PPD was $10 million in homeowners and valuables reflecting favorable claim development of $132 million on the 2017 and 2018 natural catastrophes mostly offset by adverse development of $122 million for the 2018 accident year, due to elevated non-catastrophe activity.

2018

For the three months ended March 31, 2018, net favorable PPD was $6 million, and was driven by claim development on the 2017 natural catastrophes.

North America Agricultural Insurance

For the three months ended March 31, 2019 and 2018, net favorable PPD was $61 million and $76 million, respectively. Actual claim development relates to our Multiple Peril Crop Insurance (MPCI) business and is favorable due to better than expected crop yield results in certain states at the prior year-end period (i.e., 2019 results based on crop yield results at year-end 2018).

22

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

Overseas General Insurance

2019

For the three months ended March 31, 2019, net favorable PPD was $4 million, comprising of $3 million of adverse claim development on the 2018 natural catastrophes, and $7 million of favorable development, which was the net result of several underlying favorable and adverse movements, none of which were significant individually or in the aggregate.

2018

For the three months ended March 31, 2018, net favorable PPD was $22 million, which was primarily driven by $12 million of claim development on the 2017 natural catastrophes.

Global Reinsurance

2019

For the three months ended March 31, 2019, net favorable PPD was $8 million, which was the net result of several underlying favorable and adverse movements, and was driven by the following principal changes:

• Net favorable development of $7 million in short-tail business, primarily from:

• Favorable development of $12 million, principally driven by marine, energy and surety business primarily from a favorable court ruling on an open claim; and

• Adverse development of $5 million in property catastrophe lines related to the 2018 natural catastrophes.

2018

For the three months ended March 31, 2018, net favorable PPD was $14 million, which was primarily driven by $10 million of claim development on the 2017 natural catastrophes.

Corporate

For the three months ended March 31, 2019 and 2018, adverse development was $10 million for both periods, principally related to unallocated loss adjustment expenses due to run-off operating expenses paid and incurred.

5. Commitments, contingencies, and guarantees

a) Derivative instruments

Foreign currency management

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

Derivative instruments employed

Chubb maintains positions in derivative instruments such as futures, options, swaps, and foreign currency forward contracts for which the primary purposes are to manage duration and foreign currency exposure, yield enhancement, or to obtain an exposure to a particular financial market. Chubb also maintains positions in convertible securities that contain embedded derivatives. Investment derivative instruments are recorded in either Other assets (OA) or Accounts payable, accrued expenses, and other liabilities (AP), convertible bonds are recorded in Fixed maturities available for sale (FM AFS), and convertible equity securities are recorded in Equity securities (ES) in the Consolidated balance sheets. These are the most numerous and frequent derivative transactions. In addition, Chubb purchases to be announced mortgage-backed securities (TBAs) as part of its investing activities.

Under reinsurance programs covering GLBs, Chubb assumes the risk of GLBs (principally GMIB) associated with variable annuity contracts. The GMIB risk is triggered if, at the time the contract holder elects to convert the accumulated account value to a periodic payment stream (annuitize), the accumulated account value is not sufficient to provide a guaranteed minimum level of monthly income. The GLB reinsurance product meets the definition of a derivative instrument. Benefit reserves in respect of GLBs are classified as Future policy benefits (FPB) while the fair value derivative adjustment is classified within AP. Chubb also generally maintains positions in exchange-traded equity futures contracts on equity market indices to limit equity exposure in the GMDB and GLB books of business.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

All derivative instruments are carried at fair value with changes in fair value recorded in Net realized gains (losses) in the Consolidated statements of operations. None of the derivative instruments are designated as hedges for accounting purposes.

The following table presents the balance sheet locations, fair values of derivative instruments in an asset or (liability) position, and notional values/payment provisions of our derivative instruments:

				March 31, 2019							December 31, 2018
	Consolidated Balance Sheet Location	Fair Value					Notional Value/ Payment Provision		Fair Value					Notional Value/ Payment Provision
(in millions of U.S. dollars)		Derivative Asset		Derivative (Liability)					Derivative Asset		Derivative (Liability)
Investment and embedded derivative instruments:
Foreign currency forward contracts	OA / (AP)	$	9	$	(28	)	$	2,559	$	15	$	(19	)	$	2,185
Cross-currency swaps	OA / (AP)	—		—			45		—		—			45
Interest rate swaps	OA / (AP)	—		(195		)	5,250		—		(115		)	5,250
Options/Futures contracts on notes, bonds, and equities	OA / (AP)	6		(24		)	1,080		13		(19		)	1,046
Convertible securities (1)	FM AFS / ES	8		—			9		9		—			11
TBAs	FM AFS	—		—			—		6		—			6
		$	23	$	(247	)	$	8,943	$	43	$	(153	)	$	8,543
Other derivative instruments:
Futures contracts on equities(2)	OA / (AP)	$	—	$	(12	)	$	537	$	23	$	—		$	507
Other	OA / (AP)	7		—			184		2		—			74
		$	7	$	(12	)	$	721	$	25	$	—		$	581
GLB (3)	(AP) / (FPB)	$	—	$	(741	)	$	1,458	$	—	$	(861	)	$	1,750

⁽¹⁾  Includes fair value of embedded derivatives.

⁽²⁾  Related to GMDB and GLB blocks of business.

⁽³⁾  Includes both future policy benefits reserves and fair value derivative adjustment. Note that the payment provision related to GLB is the net amount at risk. The concept of a notional value does not apply to the GLB reinsurance contracts.

At March 31, 2019 and December 31, 2018, derivative liabilitiesof $234 million and $95 million, respectively, included in the table above were subject to a master netting agreement. The remaining derivatives included in the table above were not subject to a master netting agreement. 

24

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

The following table presents net realized gains (losses) related to derivative instrument activity in the Consolidated statements of operations:

	Three Months Ended
	March 31
(in millions of U.S. dollars)	2019			2018
Investment and embedded derivative instruments:
Foreign currency forward contracts	$	(15	)	$	4
Interest rate swaps	(80		)	—
All other futures contracts, options, and equities	(36		)	13
Convertible securities (1)	1			—
Total investment and embedded derivative instruments	$	(130	)	$	17
GLB and other derivative instruments:
GLB (2)	$	114		$	38
Futures contracts on equities (3)	(63		)	22
Other	(1		)	2
Total GLB and other derivative instruments	$	50		$	62
	$	(80	)	$	79

⁽¹⁾  Includes embedded derivatives.

⁽²⁾  Excludes foreign exchange gains (losses) related to GLB.

⁽³⁾  Related to GMDB and GLB blocks of business.

b) Derivative instrument objectives

(i) Foreign currency exposure management

A foreign currency forward contract (forward) is an agreement between participants to exchange specific foreign currencies at a future date. Chubb uses forwards to minimize the effect of fluctuating foreign currencies as discussed above.

(ii) Duration management and market exposure

Futures

Futures contracts give the holder the right and obligation to participate in market movements, determined by the index or underlying security on which the futures contract is based. Settlement is made daily in cash by an amount equal to the change in value of the futures contract times a multiplier that scales the size of the contract. Exchange-traded futures contracts on money market instruments, notes, and bonds are used in fixed maturity portfolios to more efficiently manage duration, as substitutes for ownership of the money market instruments, bonds, and notes without significantly increasing the risk in the portfolio. Investments in futures contracts may be made only to the extent that there are assets under management not otherwise committed.

Exchange-traded equity futures contracts are used to limit exposure to a severe equity market decline, which would cause an increase in expected claims and therefore, an increase in reserves for GMDB and GLB reinsurance business.

Options

An option contract conveys to the holder the right, but not the obligation, to purchase or sell a specified amount or value of an underlying security at a fixed price. Option contracts are used in our investment portfolio as protection against unexpected shifts in interest rates, which would affect the duration of the fixed maturity portfolio. By using options in the portfolio, the overall interest rate sensitivity of the portfolio can be reduced. Option contracts may also be used as an alternative to futures contracts in the synthetic strategy as described above.

The price of an option is influenced by the underlying security, expected volatility, time to expiration, and supply and demand.

The credit risk associated with the above derivative financial instruments relates to the potential for non-performance by counterparties. Although non-performance is not anticipated, in order to minimize the risk of loss, management monitors the creditworthiness of its counterparties and obtains collateral. The performance of exchange-traded instruments is guaranteed by the exchange on which they trade. For non-exchange-traded instruments, the counterparties are principally banks which must meet certain criteria according to our investment guidelines.

25

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

Interest rate swaps

An interest rate swap is a contract between two counterparties in which interest payments are made based on a notional principal amount, which itself is never paid or received. Under the terms of an interest rate swap, one counterparty makes interest payments based on a fixed interest rate and the other counterparty’s payments are based on a floating rate. Interest rate swap contracts are used occasionally in our investment portfolio as protection against unexpected shifts in interest rates, which would affect the fair value of the fixed maturity portfolio. By using interest rate swaps in the portfolio, the overall duration or interest rate sensitivity of the portfolio can be impacted.

Cross-currency swaps

Cross-currency swaps are agreements under which two counterparties exchange interest payments and principal denominated in different currencies at a future date. We use cross-currency swaps to reduce the foreign currency and interest rate risk by converting cash flows back into local currency. We invest in foreign currency denominated investments to improve credit diversification and also to obtain better duration matching to our liabilities that is limited in the local currency market.

Other

Included within Other are derivatives intended to reduce potential losses which may arise from certain exposures in our insurance business. The economic benefit provided by these derivatives is similar to purchased reinsurance. For example, Chubb may enter into crop derivative contracts to protect underwriting results in the event of a significant decline in commodity prices.

(iii) Convertible security investments

A convertible security is a debt instrument or preferred stock that can be converted into a predetermined amount of the issuer’s equity. The convertible option is an embedded derivative within the host instruments which are classified in the investment portfolio as either available for sale or as an equity security. Chubb purchases convertible securities for their total return and not specifically for the conversion feature.

(iv) TBA

By acquiring TBAs, we make a commitment to purchase a future issuance of mortgage-backed securities. For the period between purchase of the TBAs and issuance of the underlying security, we account for our position as a derivative in the consolidated financial statements. Chubb purchases TBAs both for their total return and for the flexibility they provide related to our mortgage-backed security strategy.

(v) GLB

Under the GLB program, as the assuming entity, Chubb is obligated to provide coverage until the expiration or maturity of the underlying deferred annuity contracts or the expiry of the reinsurance treaty. Premiums received under the reinsurance treaties are classified as premium. Expected losses allocated to premiums received are classified as Future policy benefits and valued similar to GMDB reinsurance. Other changes in fair value arise principally from changes in expected losses allocated to expected future premiums. Fair value represents management’s estimate of an exit price and thus, includes a risk margin. We may recognize a realized loss for other changes in fair value due to adverse changes in the capital markets (e.g., declining interest rates and/or declining U.S. and/or international equity markets) and changes in actual or estimated future policyholder behavior (e.g., increased annuitization or decreased lapse rates) although we expect the business to be profitable.

To mitigate adverse changes in the capital markets, we maintain positions in exchange-traded equity futures contracts, as noted under section "(ii) Futures" above. These futures increase in fair value when the S&P 500 index decreases (and decrease in fair value when the S&P 500 index increases). The net impact of gains or losses related to changes in fair value of the GLB liability and the exchange-traded equity futures are included in Net realized gains (losses).

c) Securities lending and secured borrowings

Chubb participates in a securities lending program operated by a third-party banking institution whereby certain assets are loaned to qualified borrowers and from which we earn an incremental return. The securities lending collateral can only be drawn down by Chubb in the event that the institution borrowing the securities is in default under the lending agreement. An indemnification agreement with the lending agent protects us in the event a borrower becomes insolvent or fails to return any of the securities on loan.The collateral is recorded in Securities lending collateral and the liability is recorded in Securities lending payable in the Consolidated balance sheets.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

The following table presents the carrying value of collateral held under securities lending agreements by investment category and remaining contractual maturity of the underlying agreements:

	Remaining contractual maturity
	March 31		December 31
	2019		2018
(in millions of U.S. dollars)	Overnight and Continuous
Collateral held under securities lending agreements:
Cash	$	846	$	756
U.S. Treasury and agency	60		64
Foreign	655		795
Corporate securities	29		15
Mortgage-backed securities	47		45
Equity securities	224		251
	$	1,861	$	1,926
Gross amount of recognized liability for securities lending payable	$	1,861	$	1,926

AtMarch 31, 2019andDecember 31, 2018, our repurchase agreement obligations of$1,419 millionand$1,418 million, respectively, were fully collateralized. In contrast to securities lending programs, the use of cash received is not restricted for the repurchase obligations.The fair value of the underlying securities sold remains in Fixed maturities available for sale and the repurchase agreement obligation is recorded in Repurchase agreements in the Consolidated balance sheets.  

The following table presents the carrying value of collateral pledged under repurchase agreements by investment category and remaining contractual maturity of the underlying agreements:

	Remaining contractual maturity
	March 31, 2019						December 31, 2018
	Up to 30 Days		Greater than 90 Days		Total		30-90 Days		Greater than 90 Days		Total
(in millions of U.S. dollars)
Collateral pledged under repurchase agreements:
U.S. Treasury and agency	$	255	$	9	$	264	$	—	$	259	$	259
Mortgage-backed securities	330		884		1,214		496		713		1,209
	$	585	$	893	$	1,478	$	496	$	972	$	1,468
Gross amount of recognized liabilities for repurchase agreements					$	1,419					$	1,418
Difference (1)					$	59					$	50

⁽¹⁾  Per the repurchase agreements, the amount of collateral posted is required to exceed the amount of gross liability.

Potential risks exist in our secured borrowing transactions due to market conditions and counterparty exposure. With collateral that we pledge, there is a risk that the collateral may not be returned at the expiration of the agreement. If the counterparty fails to return the collateral, Chubb will have free use of the borrowed funds until our collateral is returned. In addition, we may encounter the risk that Chubb may not be able to renew outstanding borrowings with a new term or with an existing counterparty due to market conditions including a decrease in demand as well as more restrictive terms from banks due to increased regulatory and capital constraints. Should this condition occur, Chubb may seek alternative borrowing sources or reduce borrowings. Additionally, increased margins and collateral requirements due to market conditions would increase our restricted assets as we are required to provide additional collateral to support the transaction.

d) Fixed maturities

At March 31, 2019, we have commitments to purchase fixed income securities of $792 million over the next several years.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

e) Other investments

At March 31, 2019, included in Other investments in the Consolidated balance sheets are investments in limited partnerships and partially-owned investment companies with a carrying value of $4.2 billion. In connection with these investments, we have commitments that may require funding of up to $3.6 billion over the next several years.

f) Income Taxes

At March 31, 2019, $14 million of unrecognized tax benefits remain outstanding. It is reasonably possible that over the next twelve months, that the amount of unrecognized tax benefits may change resulting from the re-evaluation of unrecognized tax benefits arising from examinations by taxing authorities and the lapses of statutes of limitations. With few exceptions, Chubb is no longer subject to income tax examinations for years before 2010.

g) Legal proceedings

Our insurance subsidiaries are subject to claims litigation involving disputed interpretations of policy coverages and, in some jurisdictions, direct actions by allegedly-injured persons seeking damages from policyholders. These lawsuits, involving claims on policies issued by our subsidiaries which are typical to the insurance industry in general and in the normal course of business, are considered in our loss and loss expense reserves. In addition to claims litigation, we are subject to lawsuits and regulatory actions in the normal course of business that do not arise from or directly relate to claims on insurance policies. This category of business litigation typically involves, among other things, allegations of underwriting errors or misconduct, employment claims, regulatory activity, or disputes arising from our business ventures. In the opinion of management, our ultimate liability for these matters could be, but we believe is not likely to be, material to our consolidated financial condition and results of operations.

6. Shareholders’ equity

All of Chubb’s Common Shares are authorized under Swiss corporate law. Though the par value of Common Shares is stated in Swiss francs, Chubb continues to use U.S. dollars as its reporting currency for preparing consolidated financial statements. Under Swiss corporate law, dividends, including distributions through a reduction in par value (par value reduction) or from legal reserves, must be stated in Swiss francs though dividend payments are made by Chubb in U.S. dollars. At March 31, 2019, our Common Shares had a par value of CHF 24.15 per share.

At our May 2018 and 2017 annual general meetings, our shareholders approved an annual dividend for the following year of up to $2.92per share and$2.84 per share, respectively, which was paid in four quarterly installments of $0.73per share and$0.71 per share, respectively, at dates determined by the Board of Directors (Board) after the annual general meetings by way of a distribution from capital contribution reserves, transferred to free reserves for payment.

Dividend distributions per Common Share for the three months endedMarch 31, 2019 and 2018 were $0.73 (CHF 0.72) and $0.71 (CHF 0.66), respectively.

Common Shares in treasury are used principally for issuance upon the exercise of employee stock options, grants of restricted stock, and purchases under the Employee Stock Purchase Plan (ESPP). At March 31, 2019, 21,604,659 Common Shares remain in treasury after net shares redeemed under employee share-based compensation plans.

Chubb Limited securities repurchase authorization

In December 2017, the Board authorized a share repurchase program of $1.0 billion of Chubb's Common Shares from January 1, 2018 through December 31, 2018. In December 2018, our Board authorized the repurchase of up to $1.5 billion of Chubb's Common Shares from December 1, 2018 through December 31, 2019.

The following table presents repurchases of Chubb's Common Shares conducted in a series of open market transactions under the Board authorizations:

	Three Months Ended March 31				April 1, 2019 through May 1, 2019
(in millions of U.S. dollars, except share data)	2019		2018
Number of shares repurchased	2,753,754		—		550,000
Cost of shares repurchased	$	367	$	—	$	77
Repurchase authorization remaining at end of period	$	1,112	$	1,000	$	1,035

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

7. Share-based compensation

The Chubb Limited 2016 Long-Term Incentive Plan (the 2016 LTIP) permits grants of both incentive and non-qualified stock options principally at an option price per share equal to the grant date fair value of Chubb's Common Shares. Stock options are generally granted with a 3-year vesting period and a 10-year term. Stock options typically vest in equal annual installments over the respective vesting period, which is also the requisite service period. On February 28, 2019, Chubb granted 2,073,712 stock options with a weighted-average grant date fair value of $18.79 each. The fair value of the options issued is estimated on the grant date using the Black-Scholes option pricing model.

The 2016 LTIP also permits grants of service-based restricted stock and restricted stock units as well as performance-based restricted stock awards. Chubb generally grants service-based restricted stock and restricted stock units with a 4-year vesting period, based on a graded vesting schedule. Beginning in 2017, the performance-based restricted stock awards granted comprise target awards and premium awards that cliff vest at the end of a 3-year performance period based on both tangible book value (shareholders' equity less goodwill and intangible assets, net of tax) per share growth and P&C combined ratio compared to a defined group of peer companies. Premium awards are subject to an additional vesting provision based on total shareholder return compared to our peer group. The restricted stock is granted at market close price on the grant date. On February 28, 2019, Chubb granted 1,078,247 service-based restricted stock awards, 357,463 service-based restricted stock units, and 212,059 performance-based stock awards to employees and officers with a grant date fair value of $133.90 each. Each restricted stock unit represents our obligation to deliver to the holder one Common Share upon vesting.

8. Postretirement benefits

The components of net pension and other postretirement benefit costs (benefits) reflected in Net income in the Consolidated statements of operations were as follows:

	Pension Benefit Plans												Other Postretirement Benefit Plans
	2019						2018						2019			2018
Three Months Ended March 31	U.S. Plans			Non-U.S. Plans			U.S. Plans			Non-U.S. Plans
(in millions of U.S. dollars)
Service cost	$	12		$	3		$	14		$	3		$	—		$	—
Non-service cost:
Interest cost	30			7			26			7			1			1
Expected return on plan assets	(47		)	(11		)	(53		)	(13		)	(1		)	(1		)
Amortization of prior service cost	—			—			—			—			(20		)	(21		)
Total non-service (benefit) cost	(17		)	(4		)	(27		)	(6		)	(20		)	(21		)
Net periodic (benefit) cost	$	(5	)	$	(1	)	$	(13	)	$	(3	)	$	(20	)	$	(21	)

29

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

The service and non-service cost components of net periodic (benefit) cost reflected in the Consolidated statements of operations were as follows:

	Pension Benefit Plans						Other Postretirement Benefit Plans
Three Months Ended March 31	2019			2018			2019			2018
(in millions of U.S. dollars)
Service Cost:
Losses and loss expenses	$	2		$	2		$	—		$	—
Administrative expenses	13			15			—			—
Total service cost	15			17			—			—
Non-service Cost:
Losses and loss expenses	(2		)	(3		)	(2		)	(1		)
Administrative expenses	(19		)	(30		)	(18		)	(20		)
Total non-service (benefit) cost	(21		)	(33		)	(20		)	(21		)
Net periodic (benefit) cost	$	(6	)	$	(16	)	$	(20	)	$	(21	)

9. Segment information

Chubb operates through six business segments: North America Commercial P&C Insurance, North America Personal P&C Insurance, North America Agricultural Insurance, Overseas General Insurance, Global Reinsurance, and Life Insurance.

Corporate results primarily include income and expenses not attributable to reportable segments and loss and loss expenses of asbestos and environmental (A&E) liabilities.

For segment reporting purposes, certain items are presented in a different manner below than in the consolidated financial statements. Management uses underwriting income (loss) as the main measures of segment performance. Chubb calculates underwriting income (loss) by subtracting Losses and loss expenses, Policy benefits, Policy acquisition costs, and Administrative expenses from Net premiums earned. To calculate Segment income (loss), include Net investment income (loss), Other (income) expense, and Amortization of purchased intangibles. For the North America Agricultural Insurance segment, management includes gains and losses on crop derivatives as a component of underwriting income (loss). For example, for the three months ended March 31, 2019, underwriting income in our North America Agricultural Insurance segment was $73 million. This amount includes $1 million of realized losses related to crop derivatives which are reported in Net realized gains (losses) in the Corporate column below.

For the Life Insurance segment, management includes Net investment income and (Gains) losses from fair value changes in separate account assets that do not qualify for separate account reporting under GAAP as components of Life Insurance underwriting income. For example, for the three months ended March 31, 2019, Life Insurance underwriting income of $75 million includes Net investment income of $89 million and gains from fair value changes in separate account assets of $30 million. The gains from fair value changes in separate account assets are reported in Other (income) expense in the table below.

30

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

The following tables present the Statement of Operations by segment:

For the Three Months Ended March 31, 2019 (in millions of U.S. dollars)	North America Commercial P&C Insurance			North America Personal P&C Insurance		North America Agricultural Insurance			Overseas General Insurance		Global Reinsurance			Life Insurance			Corporate			Chubb Consolidated
Net premiums written	$	2,951		$	1,056	$	130		$	2,395	$	202		$	579		$	—		$	7,313
Net premiums earned	3,085			1,154		55			2,114		168			561			—			7,137
Losses and loss expenses	1,973			757		(27		)	1,106		76			202			11			4,098
Policy benefits	—			—		—			—		—			196			—			196
Policy acquisition costs	459			231		7			596		43			128			—			1,464
Administrative expenses	240			68		1			249		10			79			63			710
Underwriting income (loss)	413			98		74			163		39			(44		)	(74		)	669
Net investment income (loss)	510			64		10			144		56			89			(37		)	836
Other (income) expense	(5		)	—		—			4		(9		)	(40		)	11			(39		)
Amortization expense of purchased intangibles	—			3		7			11		—			—			55			76
Segment income (loss)	$	928		$	159	$	77		$	292	$	104		$	85		$	(177	)	$	1,468
Net realized gains (losses) including OTTI																	(97		)	(97		)
Interest expense																	140			140
Chubb integration expenses																	3			3
Income tax expense																	188			188
Net income (loss)																	$	(605	)	$	1,040

For the Three Months Ended March 31, 2018 (in millions of U.S. dollars)	North America Commercial P&C Insurance			North America Personal P&C Insurance			North America Agricultural Insurance			Overseas General Insurance		Global Reinsurance			Life Insurance			Corporate			Chubb Consolidated
Net premiums written	$	2,812		$	1,048		$	108		$	2,384	$	193		$	559		$	—		$	7,104
Net premiums earned	3,029			1,140			43			2,107		168			540			—			7,027
Losses and loss expenses	1,908			886			(53		)	1,078		67			205			11			4,102
Policy benefits	—			—			—			—		—			151			—			151
Policy acquisition costs	472			237			(1		)	588		40			128			—			1,464
Administrative expenses	231			65			(3		)	239		10			78			72			692
Underwriting income (loss)	418			(48		)	100			202		51			(22		)	(83		)	618
Net investment income (loss)	503			59			7			151		64			83			(61		)	806
Other (income) expense	(6		)	—			—			7		(7		)	(4		)	(37		)	(47		)
Amortization expense of purchased intangibles	—			3			7			10		—			1			64			85
Segment income (loss)	$	927		$	8		$	100		$	336	$	122		$	64		$	(171	)	$	1,386
Net realized gains (losses) including OTTI																		(2		)	(2		)
Interest expense																		157			157
Chubb integration expenses																		10			10
Income tax expense																		135			135
Net income (loss)																		$	(475	)	$	1,082

Underwriting assets are reviewed in total by management for purposes of decision-making. Other than Unpaid losses and loss expenses, Reinsurance recoverables, Goodwill and Other intangible assets, Chubb does not allocate assets to its segments.

31

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

10. Earnings per share

	Three Months Ended
	March 31
(in millions of U.S. dollars, except share and per share data)	2019		2018
Numerator:
Net income	$	1,040	$	1,082
Denominator:
Denominator for basic earnings per share:
Weighted-average shares outstanding	458,805,185		465,703,240
Denominator for diluted earnings per share:
Share-based compensation plans	2,731,755		3,770,351
Weighted-average shares outstanding and assumed conversions	461,536,940		469,473,591
Basic earnings per share	$	2.27	$	2.32
Diluted earnings per share	$	2.25	$	2.30
Potential anti-dilutive share conversions	4,343,204		2,116,188

Excluded from weighted-average shares outstanding and assumed conversions is the impact of securities that would have been anti-dilutive during the respective periods.

32

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

11. Information provided in connection with outstanding debt of subsidiaries

The following tables present condensed consolidating financial information at March 31, 2019 and December 31, 2018, and for the three months ended March 31, 2019 and 2018 for Chubb Limited (Parent Guarantor) and Chubb INA Holdings Inc. (Subsidiary Issuer). The Subsidiary Issuer is an indirect 100 percent-owned subsidiary of the Parent Guarantor. The Parent Guarantor fully and unconditionally guarantees certain of the debt of the Subsidiary Issuer. Condensed consolidating financial information of the Parent Guarantor and Subsidiary Issuer are presented on the equity method of accounting. The revenues and expenses and cash flows of the subsidiaries of the Subsidiary Issuer are presented in the Other Chubb Limited Subsidiaries column on a combined basis.

Condensed Consolidating Balance Sheet at March 31, 2019

(in millions of U.S. dollars)	Chubb Limited (Parent Guarantor)		Chubb INA Holdings Inc. (Subsidiary Issuer)		Other Chubb Limited Subsidiaries		Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
Assets
Investments	$	—	$	229	$	103,031	$	—		$	103,260
Cash (1)	2		71		2,220		(1,022		)	1,271
Restricted cash	—		—		122		—			122
Insurance and reinsurance balances receivable	—		—		11,491		(1,665		)	9,826
Reinsurance recoverable on losses and loss expenses	—		—		26,232		(10,095		)	16,137
Reinsurance recoverable on policy benefits	—		—		306		(103		)	203
Value of business acquired	—		—		289		—			289
Goodwill and other intangible assets	—		—		21,419		—			21,419
Investments in subsidiaries	45,648		51,996		—		(97,644		)	—
Due from subsidiaries and affiliates, net	7,358		—		616		(7,974		)	—
Other assets	9		488		20,170		(1,847		)	18,820
Total assets	$	53,017	$	52,784	$	185,896	$	(120,350	)	$	171,347
Liabilities
Unpaid losses and loss expenses	$	—	$	—	$	72,998	$	(9,855	)	$	63,143
Unearned premiums	—		—		17,039		(1,130		)	15,909
Future policy benefits	—		—		5,655		(103		)	5,552
Due to subsidiaries and affiliates, net	—		7,974		—		(7,974		)	—
Affiliated notional cash pooling programs (1)	331		691		—		(1,022		)	—
Repurchase agreements	—		—		1,419		—			1,419
Short-term debt	—		500		9		—			509
Long-term debt	—		12,070		1		—			12,071
Trust preferred securities	—		308		—		—			308
Other liabilities	331		1,894		20,478		(2,622		)	20,081
Total liabilities	662		23,437		117,599		(22,706		)	118,992
Total shareholders’ equity	52,355		29,347		68,297		(97,644		)	52,355
Total liabilities and shareholders’ equity	$	53,017	$	52,784	$	185,896	$	(120,350	)	$	171,347

⁽¹⁾  Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Various Chubb entities participate in one or the other of the Pools, pursuant to which credit and debit balances in individual Chubb accounts are translated daily into a single currency and pooled on a notional basis. Individual Chubb entities are permitted to overdraw on their individual accounts provided the overall Pool balances do not fall below zero. At March 31, 2019, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

33

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

Condensed Consolidating Balance Sheet at December 31, 2018

(in millions of U.S. dollars)	Chubb Limited (Parent Guarantor)		Chubb INA Holdings Inc. (Subsidiary Issuer)		Other Chubb Limited Subsidiaries		Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
Assets
Investments	$	—	$	214	$	100,754	$	—		$	100,968
Cash (1)	1		2		1,896		(652		)	1,247
Restricted cash	—		—		93		—			93
Insurance and reinsurance balances receivable	—		—		11,861		(1,786		)	10,075
Reinsurance recoverable on losses and loss expenses	—		—		26,422		(10,429		)	15,993
Reinsurance recoverable on policy benefits	—		—		306		(104		)	202
Value of business acquired	—		—		295		—			295
Goodwill and other intangible assets	—		—		21,414		—			21,414
Investments in subsidiaries	43,531		50,209		—		(93,740		)	—
Due from subsidiaries and affiliates, net	7,074		—		598		(7,672		)	—
Other assets	3		1,007		18,102		(1,628		)	17,484
Total assets	$	50,609	$	51,432	$	181,741	$	(116,011	)	$	167,771
Liabilities
Unpaid losses and loss expenses	$	—	$	—	$	72,857	$	(9,897	)	$	62,960
Unearned premiums	—		—		16,611		(1,079		)	15,532
Future policy benefits	—		—		5,610		(104		)	5,506
Due to subsidiaries and affiliates, net	—		7,672		—		(7,672		)	—
Affiliated notional cash pooling programs (1)	35		617		—		(652		)	—
Repurchase agreements	—		—		1,418		—			1,418
Short-term debt	—		500		9		—			509
Long-term debt	—		12,086		1		—			12,087
Trust preferred securities	—		308		—		—			308
Other liabilities	262		2,545		19,199		(2,867		)	19,139
Total liabilities	297		23,728		115,705		(22,271		)	117,459
Total shareholders’ equity	50,312		27,704		66,036		(93,740		)	50,312
Total liabilities and shareholders’ equity	$	50,609	$	51,432	$	181,741	$	(116,011	)	$	167,771

⁽¹⁾  Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Various Chubb entities participate in one or the other of the Pools, pursuant to which credit and debit balances in individual Chubb accounts are translated daily into a single currency and pooled on a notional basis. Individual Chubb entities are permitted to overdraw on their individual accounts provided the overall Pool balances do not fall below zero. At December 31, 2018, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

34

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

Condensed Consolidating Statements of Operations and Comprehensive Income

For the Three Months Ended March 31, 2019	Chubb Limited (Parent Guarantor)			Chubb INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net premiums written	$	—		$	—		$	7,313		$	—		$	7,313
Net premiums earned	—			—			7,137			—			7,137
Net investment income	1			(4		)	839			—			836
Equity in earnings of subsidiaries	990			759			—			(1,749		)	—
Net realized gains (losses) including OTTI	1			(13		)	(85		)	—			(97		)
Losses and loss expenses	—			—			4,098			—			4,098
Policy benefits	—			—			196			—			196
Policy acquisition costs and administrative expenses	20			(15		)	2,169			—			2,174
Interest (income) expense	(66		)	185			21			—			140
Other (income) expense	(6		)	3			(36		)	—			(39		)
Amortization of purchased intangibles	—			—			76			—			76
Chubb integration expenses	—			2			1			—			3
Income tax expense (benefit)	4			(42		)	226			—			188
Net income	$	1,040		$	609		$	1,140		$	(1,749	)	$	1,040
Comprehensive income	$	2,718		$	1,941		$	2,788		$	(4,729	)	$	2,718

Condensed Consolidating Statements of Operations and Comprehensive Income

For the Three Months Ended March 31, 2018	Chubb Limited (Parent Guarantor)			Chubb INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net premiums written	$	—		$	—		$	7,104		$	—		$	7,104
Net premiums earned	—			—			7,027			—			7,027
Net investment income	2			4			800			—			806
Equity in earnings of subsidiaries	1,022			885			—			(1,907		)	—
Net realized gains (losses) including OTTI	(2		)	(24		)	24			—			(2		)
Losses and loss expenses	—			—			4,102			—			4,102
Policy benefits	—			—			151			—			151
Policy acquisition costs and administrative expenses	18			22			2,116			—			2,156
Interest (income) expense	(80		)	209			28			—			157
Other (income) expense	(5		)	8			(50		)	—			(47		)
Amortization of purchased intangibles	—			—			85			—			85
Chubb integration expenses	2			1			7			—			10
Income tax expense (benefit)	5			(59		)	189			—			135
Net income	$	1,082		$	684		$	1,223		$	(1,907	)	$	1,082
Comprehensive income	$	453		$	216		$	614		$	(830	)	$	453

35

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

Condensed Consolidating Statement of Cash Flows

For the Three Months Ended March 31, 2019	Chubb Limited (Parent Guarantor)			Chubb INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net cash flows from (used for) operating activities	$	307		$	(163	)	$	1,378		$	(200	)	$	1,322
Cash flows from investing activities
Purchases of fixed maturities available for sale	—			(3		)	(5,558		)	—			(5,561		)
Purchases of fixed maturities held to maturity	—			—			(1		)	—			(1		)
Purchases of equity securities	—			—			(49		)	—			(49		)
Sales of fixed maturities available for sale	—			—			3,293			—			3,293
Sales of equity securities	—			—			60			—			60
Maturities and redemptions of fixed maturities available for sale	—			6			1,825			—			1,831
Maturities and redemptions of fixed maturities held to maturity	—			—			280			—			280
Net change in short-term investments	—			(3		)	(36		)	—			(39		)
Net derivative instruments settlements	—			(28		)	(330		)	—			(358		)
Private equity contributions	—			—			(410		)	—			(410		)
Private equity distributions	—			—			368			—			368
Capital contribution	—			(110		)	—			110			—
Other	—			(12		)	(75		)	—			(87		)
Net cash flows used for investing activities	—			(150		)	(633		)	110			(673		)
Cash flows from financing activities
Dividends paid on Common Shares	(336		)	—			—			—			(336		)
Common Shares repurchased	—			—			(367		)	—			(367		)
Proceeds from issuance of repurchase agreements	—			—			471			—			471
Repayment of repurchase agreements	—			—			(470		)	—			(470		)
Proceeds from share-based compensation plans	—			—			35			—			35
Dividend to parent company	—			—			(200		)	200			—
Advances (to) from affiliates	(266		)	308			(42		)	—			—
Capital contribution	—			—			110			(110		)	—
Net proceeds from affiliated notional cash pooling programs (1)	296			74			—			(370		)	—
Policyholder contract deposits	—			—			115			—			115
Policyholder contract withdrawals	—			—			(78		)	—			(78		)
Net cash flows from (used for) financing activities	(306		)	382			(426		)	(280		)	(630		)
Effect of foreign currency rate changes on cash and restricted cash	—			—			34			—			34
Net increase in cash and restricted cash	1			69			353			(370		)	53
Cash and restricted cash – beginning of period (1)	1			2			1,989			(652		)	1,340
Cash and restricted cash – end of period (1)	$	2		$	71		$	2,342		$	(1,022	)	$	1,393

⁽¹⁾  Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Various Chubb entities participate in one or the other of the Pools, pursuant to which credit and debit balances in individual Chubb accounts are translated daily into a single currency and pooled on a notional basis. Individual Chubb entities are permitted to overdraw on their individual accounts provided the overall Pool balances do not fall below zero. At March 31, 2019 and December 31, 2018, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

36

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued (Unaudited)

Chubb Limited and Subsidiaries

Condensed Consolidating Statement of Cash Flows

For the Three Months Ended March 31, 2018	Chubb Limited (Parent Guarantor)			Chubb INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net cash flows from operating activities	$	24		$	2,727		$	800		$	(3,000	)	$	551
Cash flows from investing activities
Purchases of fixed maturities available for sale	—			(8		)	(5,964		)	—			(5,972		)
Purchases of fixed maturities held to maturity	—			—			(162		)	—			(162		)
Purchases of equity securities	—			—			(55		)	—			(55		)
Sales of fixed maturities available for sale	—			—			2,562			—			2,562
Sales of equity securities	—			—			40			—			40
Maturities and redemptions of fixed maturities    available for sale	—			3			1,862			—			1,865
Maturities and redemptions of fixed maturities held to maturity	—			—			255			—			255
Net change in short-term investments	—			(14		)	745			—			731
Net derivative instruments settlements	—			(7		)	46			—			39
Private equity contributions	—			—			(353		)	—			(353		)
Private equity distributions	—			—			201			—			201
Capital contribution	(750		)	(3,500		)	—			4,250			—
Other	—			(3		)	(29		)	—			(32		)
Net cash flows used for investing activities	(750		)	(3,529		)	(852		)	4,250			(881		)
Cash flows from financing activities
Dividends paid on Common Shares	(330		)	—			—			—			(330		)
Common Shares repurchased	—			—			(29		)	—			(29		)
Proceeds from issuance of long-term debt	—			2,175			—			—			2,175
Repayment of long-term debt	—			(300		)	—			—			(300		)
Proceeds from issuance of repurchase agreements	—			—			408			—			408
Repayment of repurchase agreements	—			—			(404		)	—			(404		)
Proceeds from share-based compensation plans	—			—			34			—			34
Dividend to parent company	—			—			(3,000		)	3,000			—
Advances (to) from affiliates	656			(95		)	(561		)	—			—
Capital contribution	—			—			4,250			(4,250		)	—
Net proceeds from (payments to) affiliated notional cash pooling programs (1)	400			(115		)	—			(285		)	—
Policyholder contract deposits	—			—			118			—			118
Policyholder contract withdrawals	—			—			(105		)	—			(105		)
Net cash flows from financing activities	726			1,665			711			(1,535		)	1,567
Effect of foreign currency rate changes on cash and restricted cash	(2		)	—			27			—			25
Net increase (decrease) in cash and restricted cash	(2		)	863			686			(285		)	1,262
Cash and restricted cash – beginning of period (1)	3			1			962			(115		)	851
Cash and restricted cash – end of period (1)	$	1		$	864		$	1,648		$	(400	)	$	2,113

⁽¹⁾  Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Various Chubb entities participate in one or the other of the Pools, pursuant to which credit and debit balances in individual Chubb accounts are translated daily into a single currency and pooled on a notional basis. Individual Chubb entities are permitted to overdraw on their individual accounts provided the overall Pool balances do not fall below zero. At March 31, 2018 and December 31, 2017, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

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ITEM 2. Management's Discussion and Analysis of Financial Condition and Results of Operations

The following is a discussion of our results of operations, financial condition, and liquidity and capital resources as of and for the three months ended March 31, 2019.

All comparisons in this discussion are to the corresponding prior year period unless otherwise indicated. All dollar amounts are rounded. However, percent changes and ratios are calculated using whole dollars. Accordingly, calculations using rounded dollars may differ.

Our results of operations and cash flows for any interim period are not necessarily indicative of our results for the full year. This discussion should be read in conjunction with our consolidated financial statements and related notes and our Management’s Discussion and Analysis of Financial Condition and Results of Operations included in our Annual Report on Form 10-K for the year ended December 31, 2018 (2018 Form 10-K).

Other Information

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

MD&A Index	Page
Forward-Looking Statements	39
Overview	41
Financial Highlights	41
Consolidated Operating Results	42
Segment Operating Results	46
Effective Income Tax Rate	57
Non-GAAP Reconciliation	57
Other Income and Expense	61
Amortization of Purchased Intangibles and Other Amortization	61
Interest Expense	63
Net Investment Income	63
Net Realized and Unrealized Gains (Losses)	64
Investments	65
Critical Accounting Estimates	68
Reinsurance Recoverable on Ceded Reinsurance	68
Unpaid Losses and Loss Expenses	69
Asbestos and Environmental (A&E)	69
Fair Value Measurements	69
Catastrophe Management	69
Natural Catastrophe Property Reinsurance Program	70
Crop Insurance	71
Liquidity	72
Capital Resources	73

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Forward-Looking Statements

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

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

• the number of insureds and ceding companies affected;

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

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

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

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

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

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

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

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

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

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

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

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

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

• the potential impact of the United Kingdom’s vote to withdraw from the European Union, including political, regulatory, social, and economic uncertainty and market and exchange rate volatility;

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

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

• the capital markets;

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

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

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

• the effects of data privacy or cyber laws or regulation on our current or future business;

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

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

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

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

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

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

• the adequacy of collateral supporting funded high deductible programs;

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

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

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

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

• the amount of dividends received from subsidiaries;

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

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

• the ability of our company to increase use of data analytics and technology as part of our business strategy and adapt to new technologies; and

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

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

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Overview

Chubb Limited is the Swiss-incorporated holding company of the Chubb Group of Companies. Chubb Limited, which is headquartered in Zurich, Switzerland, and its direct and indirect subsidiaries (collectively, the Chubb Group of Companies, Chubb, we, us, or our) are a global insurance and reinsurance organization, serving the needs of a diverse group of clients worldwide. At March 31, 2019, we had total assets of $171 billion and shareholders’ equity of $52 billion. Chubb was incorporated in 1985 at which time it opened its first business office in Bermuda and continues to maintain operations in Bermuda. We operate through six business segments: North America Commercial P&C Insurance, North America Personal P&C Insurance, North America Agricultural Insurance, Overseas General Insurance, Global Reinsurance, and Life Insurance. For more information on our segments refer to “Segment Information” under Item 1 in our 2018 Form 10-K.

Financial Highlights for the Three Months Ended March 31, 2019

• Net income was $1,040 million compared with $1,082 million in the prior year period.

• Total company and P&C net premiums written were $7.3 billion and $6.7 billion, respectively, both up 2.9 percent, or 5.1 percent on a constant-dollar basis.

• P&C combined ratio was 89.2 percent compared with 90.1 percent in the prior year period. P&C current accident year combined ratio excluding catastrophe losses was 88.5 percent compared with 87.6 percent in the prior year period.

• Total pre-tax and after-tax catastrophe losses were $250 million (3.8 percentage points of the combined ratio) and $201 million, respectively, compared with $380 million (5.8 percentage points of the combined ratio) and $303 million, respectively, in the prior year period.

• Total pre-tax and after-tax favorable prior period development were $204 million (3.1 percentage points of the combined ratio) and $161 million, respectively, compared with $209 million (3.3 percentage points of the combined ratio) and $166 million, respectively, in the prior year period.

• Operating cash flow was $1,322 million compared with $551 million in the prior year period. Refer to the Liquidity section for additional information on our cash flows.

• Net investment income was $836 million compared with $806 million in the prior year period.

• Share repurchases totaled $367 million, or approximately 2.8 million shares, during the quarter.

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Consolidated Operating Results – Three Months Ended March 31, 2019 and 2018

	Three Months Ended
	March 31						% Change
(in millions of U.S. dollars, except for percentages)	2019			2018			Q-19 vs. Q-18
Net premiums written (1)	$	7,313		$	7,104		2.9	%
Net premiums earned (1)	7,137			7,027			1.6	%
Net investment income	836			806			3.7	%
Net realized gains (losses)	(97		)	(2		)	NM
Total revenues	7,876			7,831			0.6	%
Losses and loss expenses	4,098			4,102			(0.1	)%
Policy benefits	196			151			29.8	%
Policy acquisition costs	1,464			1,464			—
Administrative expenses	710			692			2.5	%
Interest expense	140			157			(10.8	)%
Other (income) expense	(39		)	(47		)	(17.8	)%
Amortization of purchased intangibles	76			85			(10.2	)%
Chubb integration expenses	3			10			(69.3	)%
Total expenses	6,648			6,614			0.5	%
Income before income tax	1,228			1,217			0.9	%
Income tax expense	188			135			39.4	%
Net income	$	1,040		$	1,082		(3.9	)%

NM – not meaningful

⁽¹⁾   On a constant-dollar basis for the three months ended March 31, 2019, net premiums written increased$353 million, or 5.1 percent, and net premiums earned increased$251 million, or 3.6 percent. Amounts are calculated by translating prior period results using the same local currency exchange rates as the comparable current period.

Net Premiums Written

Net premiums written reflect the premiums we retain after purchasing reinsurance protection. For the three months ended March 31, 2019 consolidated net premiums written increased$209 million, or $353 million (5.1 percent), on a constant-dollar basis, reflecting growth across all segments.

• Net premiums written in our North America Commercial P&C Insurance segment increased$139 million, or 5.0 percent, for the three months endedMarch 31, 2019, reflecting positive rate increases, new business written, and strong renewals across many retail lines, particularly in casualty, financial lines, A&H, package, and property, as well as growth in our wholesale and high excess Bermuda lines and in our small commercial businesses.

• Net premiums written in our North America Personal P&C Insurance segment increased$8 million, or 0.8 percent, for the three months endedMarch 31, 2019, due to strong retention and rate increases primarily in our homeowners and personal excess products, partially offset by higher cessions due to the homeowners quota share reinsurance treaty which was effective October 1, 2018.

• Net premiums written in our North America Agricultural Insurance segment increased$22 million, or 19.9 percent, for the three months endedMarch 31, 2019, primarily due to growth in Chubb Agribusiness and the year-over-year increase in MPCI premiums reflecting less premiums returned to the U.S government under the premium-sharing formulas. Under the MPCI profit and loss calculation, we cede additional premiums to the government during profitable years. In the prior year, the program was more profitable which resulted in higher cessions compared to the first quarter of 2019.

• Net premiums written in our Overseas General Insurance segment increased$11 million, or $136 million (6.0 percent) on a constant-dollar basis, for the three months endedMarch 31, 2019, reflecting growth across all regions and lines of business. P&C lines growth was principally due to new business in small commercial property and general casualty lines, middle market, and excess and surplus lines. Personal lines growth was driven by new business. Accident and health (A&H) lines growth was principally in Asia and Latin America driven by new business.

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• Net premiums written in our Global Reinsurance segment increased$9 million, or $12 million (6.4 percent) on a constant-dollar basis, for the three months endedMarch 31, 2019, primarily due to new business written in marine and property lines, and the timing of homeowners business, which was previously written mainly in the third quarter of 2018. This increase was partially offset by lower net renewals primarily in the motor line, which were reflective of competitive market conditions and higher ceded retrocessions principally in property catastrophe lines mainly due to timing.

• Net premiums written in our Life Insurance segment increased $20 million, or $29 million (5.2 percent) on a constant-dollar basis, for the three months endedMarch 31, 2019, primarily reflecting growth in our North American Combined Insurance supplemental A&H program and Asian and Latin American international life operations, partially offset by our life reinsurance business, which continues to decline as no new life reinsurance business is currently being written.

Net Premiums Written By Line of Business

	Three Months Ended
							March 31
(in millions of U.S. dollars, except for percentages)	2019		2018		% Change Q-19 vs. Q-18		C$(1)2018		C$ (1) % Change Q-19 vs. Q-18
Commercial casualty	$	1,200	$	1,101	8.9	%	$	1,087	10.4	%
Workers' compensation	593		622		(4.6	)%	622		(4.6	)%
Professional liability	786		773		1.7	%	761		3.4	%
Surety	152		161		(5.4	)%	156		(2.5	)%
Commercial multiple peril (2)	219		200		9.0	%	200		9.0	%
Property and other short-tail lines	1,157		1,087		6.6	%	1,058		9.4	%
Total Commercial P&C (3)	4,107		3,944		4.2	%	3,884		5.7	%
Agriculture	130		108		19.9	%	108		19.9	%
Personal automobile	421		398		6.0	%	391		7.9	%
Personal homeowners	743		738		0.6	%	735		1.1	%
Personal other	368		387		(4.9	)%	372		(1.0	)%
Total Personal lines	1,532		1,523		0.6	%	1,498		2.3	%
Total Property and Casualty lines	5,769		5,575		3.5	%	5,490		5.1	%
Global A&H lines (4)	1,073		1,072		0.1	%	1,022		5.0	%
Reinsurance lines	202		193		4.4	%	190		6.4	%
Life	269		264		1.6	%	258		4.1	%
Total consolidated	$	7,313	$	7,104	2.9	%	$	6,960	5.1	%

⁽¹⁾  On a constant-dollar basis. Amounts are calculated by translating prior period results using the same local currency exchange rates as the comparable current period.

⁽²⁾  Commercial multiple peril represents retail package business (property and general liability).

⁽³⁾  March 31, 2018 includes a reclassification of $44 million from Commercial casualty, $2 million from Workers' compensation, and $1 million from Commercial multiple peril to Property and other short-tail lines to better align the reporting with current year. There is no impact to total Commercial P&C.

⁽⁴⁾  For purposes of this schedule only, A&H results from our Combined North America and International businesses, normally included in the Life Insurance and Overseas General Insurance segments, respectively, as well as the A&H results of our North America Commercial P&C segment, are included in Global A&H lines above.

The increase in net premiums written for the three months ended March 31, 2019, reflects growth across most lines of business from positive rate increases, new business and strong renewals. The increase in commercial casualty and professional liability business was due to new business in North America, Europe, and Asia. Workers' compensation was adversely impacted by competitive market conditions. Commercial multiple peril increased due to new business and strong renewals. Property and other short-tail lines increased due to growth in North America major accounts and internationally due to new business and strong renewals. Our personal lines increased in North America due to strong retention and rate increases in homeowners and

43

personal excess products. Personal lines growth in North America was partially offset by higher cessions due to the homeowners quota share reinsurance treaty which was effective October 1, 2018. Global A&H lines increased due to growth in our North American Combined Insurance supplemental A&H program. For additional information on net premiums written, refer to the segment results discussions.

Net Premiums Earned

Net premiums earned for short-duration contracts, typically P&C contracts, generally reflect the portion of net premiums written that were recorded as revenues for the period as the exposure periods expire. Net premiums earned for long-duration contracts, typically traditional life contracts, generally are recognized as earned when due from policyholders. For the three months ended March 31, 2019, net premiums earned increased$110 million, or $251 million (3.6 percent) on a constant-dollar basis, reflecting the growth in net premiums written as described above. Net premiums earned benefited from $57 million of net premiums written in the quarter principally related to large structured transactions and audit and retrospective premium adjustments that were fully earned when written, compared to $54 million in the prior year.

P&C Combined Ratio

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

	Three Months Ended
	March 31
	2019		2018
Loss and loss expense ratio	59.3	%	60.0	%
Policy acquisition cost ratio	20.3	%	20.6	%
Administrative expense ratio	9.6	%	9.5	%
P&C Combined ratio	89.2	%	90.1	%

The loss and loss expense ratio decreased0.7 percentage points for the three months ended March 31, 2019, due to the following:

• Lower catastrophe losses partially offset by lower favorable PPD (net 1.6 percentage points);

• Offset by an increase in the underlying loss ratio, reflecting earned rate changes modestly below loss trends.

Policy acquisition costs consist of commissions, premium taxes, and certain underwriting costs directly related to the successful acquisition of new or renewal insurance contracts. Our policy acquisition cost ratio decreased 0.3 percentage points for the three months ended March 31, 2019, primarily due to a supplemental commission adjustment in the current year which decreased the policy acquisition cost ratio along with higher net premiums earned as described above.

Our administrative expense ratio remained relatively flat for the three months ended March 31, 2019.

Catastrophe Losses and Prior Period Development

Catastrophe losses exclude reinstatement premiums which are additional premiums paid on certain reinsurance agreements in order to reinstate coverage that had been exhausted by loss occurrences. The reinstatement premium amount is typically a pro rata portion of the original ceded premium paid based on how much of the reinsurance limit had been exhausted. Prior period development is net of related adjustments which typically relate to either profit commission reserves or policyholder dividend reserves based on actual claim experience that develops after the policy period ends. The expense adjustments correlate to the prior period loss development on these same policies. Refer to the Non-GAAP Reconciliation section for further information on reinstatement premiums on catastrophe losses and adjustments to prior period development.

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	Three Months Ended
	March 31
(in millions of U.S dollars)	2019		2018
Catastrophe losses	$	250	$	380
Favorable prior period development	$	204	$	209

We generally define catastrophe loss events consistent with the definition of the Property Claims Service (PCS) for events in the U.S. and Canada. PCS defines a catastrophe as an event that causes damage of $25 million or more in insured property losses and affects a significant number of insureds. For events outside of the U.S. and Canada, we generally use a similar definition.

The following tables present catastrophe losses, including reinstatement premiums (RIPs), for the three months ended March 31, 2019 and 2018:

	Catastrophe Loss Charge by Event
	North America Commercial P&C Insurance		North America Personal P&C Insurance		North America Agricultural Insurance		Overseas General Insurance		Global Reinsurance		Total Consolidated including RIPs
Three Months Ended
March 31, 2019
(in millions of U.S. dollars)
Net losses
Winter-related storms	$	70	$	119	$	2	$	—	$	—	$	191
U.S. flooding, hail, tornadoes, and wind events	24		10		—		—		—		34
Australia storms	—		—		—		21		—		21
Other	—		—		—		4		—		4
Total before income tax	$	94	$	129	$	2	$	25	$	—	$	250
Income tax benefit											49
Total after income tax											$	201

	Catastrophe Loss Charge by Event
	North America Commercial P&C Insurance		North America Personal P&C Insurance		North America Agricultural Insurance		Overseas General Insurance		Global Reinsurance		Total Consolidated including RIPs
Three Months Ended
March 31, 2018
(in millions of U.S. dollars)
Net losses
Northeast winter storms	$	53	$	139	$	1	$	—	$	2	$	195
California mudslides	4		120		—		1		—		125
Other	21		25		—		14		—		60
Total before income tax	$	78	$	284	$	1	$	15	$	2	$	380
Income tax benefit											77
Total after income tax											$	303

Prior period development (PPD) arises from changes to loss estimates recognized in the current year that relate to loss events that occurred in previous calendar years and excludes the effect of losses from the development of earned premium from previous accident years. Refer to the Prior Period Development section in Note 4 to the Consolidated Financial Statements for additional information.

Pre-tax net favorable prior period development for the three months ended March 31, 2019 was $204 million, including $61 million favorable development related to the 2018 crop year loss estimates, $124 million favorable development related to the 2017 and 2018 catastrophe events, principally in homeowners, and adverse development of $122 million principally in homeowners due to elevated non-catastrophe activity. The remaining favorable development of $141 million is split approximately 60 percent from short-tail lines and 40 percent from long-tail lines, primarily from accident years 2014 and prior.

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Pre-tax net favorable prior period development for the three months ended March 31, 2018 was $209 million, which included favorable development of $106 million related to 2017 catastrophe events and $76 million related to the 2017 crop year loss estimates.

Current Accident Year (CAY) Loss Ratio excluding CATs and CAY P&C Combined Ratio excluding CATs

For these measures, the numerator includes losses and loss expenses adjusted to exclude CATs and PPD. In addition, the denominator is adjusted to exclude net premiums earned adjustments on PPD and reinstatement premiums on CATs and PPD.

	Three Months Ended
	March 31
	2019		2018
Loss and loss expense ratio	59.3	%	60.0	%
Catastrophe losses	(3.8	)%	(5.8	)%
Prior period development	3.1	%	3.5	%
CAY loss ratio excluding catastrophe losses	58.6	%	57.7	%

The CAY loss ratio excluding CATs increased 0.9 percentage points for the three months ended March 31, 2019, due to an increase in the underlying loss ratio, reflecting earned rate changes modestly below loss trends.

CAY P&C Combined Ratio excluding Catastrophe Losses

	Three Months Ended
	March 31
	2019		2018
CAY Loss and loss expense ratio ex CATs	58.6	%	57.7	%
CAY Policy acquisition cost ratio ex CATs	20.3	%	20.5	%
CAY Administrative expense ratio ex CATs	9.6	%	9.4	%
CAY P&C combined ratio ex CATs	88.5	%	87.6	%
Adverse impact of CATs above an expected level on combined ratio	0.6	%	2.7	%

Refer to the Non-GAAP Reconciliation section for the definition of “expected level of CATs.”

Policy benefits

Policy benefits represent losses on contracts classified as long-duration and generally include accident and supplemental health products, term and whole life products, endowment products, and annuities. Refer to the Life Insurance segment operating results section for further discussion.

For the three months ended March 31, 2019 and 2018, Policy benefits were $196 million and $151 million, respectively, which included separate account losses of $30 million and $6 million, respectively, related to separate account liabilities.

Refer to the respective sections for a discussion of Net investment income, Interest expense, Other (income) expense, Net realized gains and losses, Amortization of purchased intangibles, and Income tax expense.

Segment Operating Results – Three Months Ended March 31, 2019 and 2018

We operate through six business segments: North America Commercial P&C Insurance, North America Personal P&C Insurance, North America Agricultural Insurance, Overseas General Insurance, Global Reinsurance, and Life Insurance. For more information on our segments refer to “Segment Information” under Item 1 in our 2018 Form 10-K.

Corporate results primarily include the results of our non-insurance companies, income and expenses not attributable to reportable segments and loss and loss expenses of asbestos and environmental (A&E) liabilities.

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North America Commercial P&C Insurance

The North America Commercial P&C Insurance segment comprises operations that provide property and casualty (P&C) insurance and services to large, middle market, and small commercial businesses in the U.S., Canada, and Bermuda. This segment includes our North America Major Accounts and Specialty Insurance division (large corporate accounts and wholesale business), and the North America Commercial Insurance division (principally middle market and small commercial accounts).

	Three Months Ended
	March 31						% Change
(in millions of U.S. dollars, except for percentages)	2019			2018			Q-19 vs. Q-18
Net premiums written	$	2,951		$	2,812		5.0			%
Net premiums earned	3,085			3,029			1.9			%
Losses and loss expenses	1,973			1,908			3.4			%
Policy acquisition costs	459			472			(2.8			)%
Administrative expenses	240			231			4.1			%
Underwriting income	413			418			(1.1			)%
Net investment income	510			503			1.1			%
Other (income) expense	(5		)	(6		)	(5.4			)%
Segment income	$	928		$	927		0.1			%
Loss and loss expense ratio	63.9		%	63.0		%	0.9		pts
Policy acquisition cost ratio	14.9		%	15.6		%	(0.7	)	pts
Administrative expense ratio	7.8		%	7.6		%	0.2		pts
Combined ratio	86.6		%	86.2		%	0.4		pts

Premiums

Net premiums written increased$139 million, or 5.0 percent, for the three months endedMarch 31, 2019, reflecting positive rate increases, new business written, and strong renewals across many retail lines, particularly in casualty, financial lines, A&H, package, and property, as well as growth in our wholesale and high excess Bermuda lines and in our small commercial businesses.

Net premiums earned increased$56 million, or 1.9 percent, for the three months endedMarch 31, 2019 due to net premiums written growth described above. Net premiums earned benefited from $57 million of net premiums written in the quarter principally related to large structured transactions and audit and retrospective premium adjustments that were fully earned when written, compared to $54 million in the prior year.

Combined Ratio

The loss and loss expense ratio increased0.9 percentage points for the three months endedMarch 31, 2019, primarily due to an increase in the underlying loss ratio, reflecting earned rate changes modestly below loss trends and higher catastrophe losses partially offset by higher favorable prior period development.

The policy acquisition cost ratio decreased0.7 percentage points for the three months endedMarch 31, 2019, primarily due to a change in mix of business towards lower acquisition cost ratio lines and increased cessions under certain reinsurance agreements that resulted in higher ceded acquisition costs benefit than in prior year.

The administrative expense ratio increased0.2 percentage points for the three months endedMarch 31, 2019, primarily due to higher employee-related expenses, including merit-based salary and inflationary increases.

47

Catastrophe Losses and Prior Period Development

	Three Months Ended
	March 31
(in millions of U.S. dollars)	2019		2018
Catastrophe losses	$	94	$	78
Favorable prior period development	$	131	$	101

Catastrophe losses through March 31, 2019 and 2018 were primarily from the following events (refer to table on page 45):

• 2019: Winter-related storms and other severe weather-related events in the U.S.

• 2018: Severe weather-related events in the U.S.

Refer to the prior period development discussion in Footnote 4 to the Consolidated Financial Statements for additional information.

CAY Loss Ratio excluding Catastrophe Losses

	Three Months Ended
	March 31
	2019		2018
Loss and loss expense ratio	63.9	%	63.0	%
Catastrophe losses	(3.0	)%	(2.6	)%
Prior period development	4.1	%	3.6	%
CAY loss ratio excluding catastrophe losses	65.0	%	64.0	%

The CAY loss ratio excluding catastrophe losses increased1.0 percentage point for the three months endedMarch 31, 2019, primarily due to an increase in the underlying loss ratio, reflecting earned rate changes modestly below loss trends.

48

North America Personal P&C Insurance

The North America Personal P&C Insurance segment comprises operations that provide high net worth personal lines products, including homeowners and complementary products such as valuable articles, excess liability, automobile, and recreational marine insurance and services in the U.S. and Canada.

	Three Months Ended
	March 31						% Change
(in millions of U.S. dollars, except for percentages)	2019			2018			Q-19 vs. Q-18
Net premiums written	$	1,056		$	1,048		0.8			%
Net premiums earned	1,154			1,140			1.2			%
Losses and loss expenses	757			886			(14.6			)%
Policy acquisition costs	231			237			(2.3			)%
Administrative expenses	68			65			4.5			%
Underwriting income (loss)	98			(48		)	NM
Net investment income	64			59			8.7			%
Other (income) expense	—			—			NM
Amortization of purchased intangibles	3			3			—
Segment income	$	159		$	8		NM
Loss and loss expense ratio	65.5		%	77.7		%	(12.2	)	pts
Policy acquisition cost ratio	20.1		%	20.8		%	(0.7	)	pts
Administrative expense ratio	5.9		%	5.7		%	0.2		pts
Combined ratio	91.5		%	104.2		%	(12.7	)	pts

NM – not meaningful

Premiums

Net premiums written increased$8 million, or 0.8 percent, for the three months endedMarch 31, 2019, due to strong retention and rate increases primarily in our homeowners and personal excess products, partially offset by higher cessions due to the homeowners quota share reinsurance treaty which was effective October 1, 2018.

Net premiums earned increased$14 million, or 1.2 percent, for the three months endedMarch 31, 2019, reflecting the earning in of premiums written in the prior year and the factors described above.

Combined Ratio

The loss and loss expense ratio decreased12.2 percentage points for the three months endedMarch 31, 2019, primarily due to lower catastrophe losses and higher favorable prior period development (together 14.0 percentage points), partially offset by an increase in the underlying loss ratio, reflecting an ongoing re-evaluation of non-catastrophe loss activity.

The policy acquisition cost ratio decreased0.7 percentage points for the three months endedMarch 31, 2019, primarily due to a supplemental commission adjustment in the current year which decreased the policy acquisition cost ratio.

The administrative expense ratio increased0.2 percentage points for the three months endedMarch 31, 2019, primarily due to higher employee-related expenses, including merit-based salary and inflationary increases.

Catastrophe losses and Prior Period Development

	Three Months Ended
	March 31
(in millions of U.S. dollars)	2019		2018
Catastrophe losses	$	129	$	284
Favorable prior period development	$	10	$	6

49

Catastrophe losses through March 31, 2019 and 2018 were primarily from the following events (refer to table on page 45):

• 2019: Winter-related storms and other severe weather-related events in the U.S.

• 2018: California mudslides and Northeast winter storms.

Refer to the prior period development discussion in Footnote 4 to the Consolidated Financial Statements for additional information.

CAY Loss Ratio excluding Catastrophe Losses

	Three Months Ended
	March 31
	2019		2018
Loss and loss expense ratio	65.5	%	77.7	%
Catastrophe losses	(11.2	)%	(24.9	)%
Prior period development	0.8	%	0.5	%
CAY loss ratio excluding catastrophe losses	55.1	%	53.3	%

The CAY loss ratio excluding catastrophe losses increased1.8 percentage points for the three months endedMarch 31, 2019, primarily due to an increase in the underlying loss ratio, reflecting an ongoing re-evaluation of non-catastrophe loss activity.

North America Agricultural Insurance

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

	Three Months Ended
	March 31						% Change
(in millions of U.S. dollars, except for percentages)	2019			2018			Q-19 vs. Q-18
Net premiums written	$	130		$	108		19.9		%
Net premiums earned	55			43			27.4		%
Losses and loss expenses (1)	(26		)	(55		)	(51.8		)%
Policy acquisition costs	7			(1		)	NM
Administrative expenses	1			(3		)	NM
Underwriting income	73			102			(28.6		)%
Net investment income	10			7			47.0		%
Amortization of purchased intangibles	7			7			—
Segment income	$	76		$	102		(25.6		)%
Loss and loss expense ratio	(48.3		)%	(127.6		)%	79.3	pts
Policy acquisition cost ratio	12.1		%	(3.1		)%	15.2	pts
Administrative expense ratio	2.6		%	(7.6		)%	10.2	pts
Combined ratio	(33.6		)%	(138.3		)%	104.7	pts

NM – not meaningful

⁽¹⁾  Gains (losses) on crop derivatives were $(1) million and $2 million for the three months endedMarch 31, 2019 and 2018, respectively. These gains (losses) are included in Net realized gains (losses) in our Consolidated statements of operations but are reclassified to Losses and loss expenses for purposes of presenting North America Agricultural Insurance underwriting income.

Premiums

Net premiums written increased$22 million, or 19.9 percent, for the three months endedMarch 31, 2019, primarily due to growth in Chubb Agribusiness and the year-over-year increase in MPCI premiums reflecting less premiums returned to the U.S government under the premium-sharing formulas. Under the MPCI profit and loss calculation, we cede additional premiums to

50

the government during profitable years. In the prior year, the program was more profitable which resulted in higher cessions compared to the first quarter of 2019.

Net premiums earned increased$12 million, or 27.4 percent, for the three months endedMarch 31, 2019, due to the factors described above.

Combined Ratio

The loss and loss expense ratio increased79.3 percentage points for the three months endedMarch 31, 2019, primarily due to lower favorable prior period development and higher catastrophe losses, as well as current quarter loss on our crop derivatives compared to a crop derivative gain in the prior year.

The policy acquisition cost ratio increased15.2 percentage points for the three months endedMarch 31, 2019, primarily due to reinsurance ceded commission adjustment in the prior year that benefited acquisition expenses and the year-over-year impact of premiums returned to the U.S. government under the premium-sharing formulas.

The administrative expense ratio increased10.2 percentage points for the three months endedMarch 31, 2019, primarily due to a reduction in the current year Administrative and Operating (A&O) reimbursements on the MPCI business we recorded under the government program. The current year reimbursement was less than the prior year reimbursement. In addition, the administrative expense ratio was higher due to merit-based salary increases.

Catastrophe Losses and Prior Period Development

	Three Months Ended
	March 31
(in millions of U.S. dollars)	2019		2018
Catastrophe losses	$	2	$	1
Favorable prior period development	$	61	$	76

Catastrophe losses through March 31, 2019 and 2018 were primarily from our farm, ranch, and specialty P&C businesses.

Refer to the prior period development discussion in Footnote 4 to the Consolidated Financial Statements for additional information.

For the three months endedMarch 31, 2019, net favorable prior period development was $61 million which included $90 million of favorable incurred losses and $3 million of lower acquisition costs due to lower than expected MPCI losses for the 2018 crop year, partially offset by a $32 million decrease in net premiums earned related to the MPCI profit and loss calculation formula. For the three months endedMarch 31, 2018, net favorable prior period development was $76 million which included $112 million of favorable incurred losses and $4 million of lower acquisition costs due to lower than expected MPCI losses for the 2017 crop year, partially offset by a $40 million decrease in net premiums earned related to the MPCI profit and loss calculation formula.

CAY Loss Ratio excluding Catastrophe Losses

	Three Months Ended
	March 31
	2019		2018
Loss and loss expense ratio	(48.3	)%	(127.6	)%
Catastrophe losses	(4.1	)%	(1.5	)%
Prior period development	123.5	%	198.0	%
CAY loss ratio excluding catastrophe losses	71.1	%	68.9	%

The CAY loss ratio excluding catastrophe losses increased2.2 percentage points for the three months endedMarch 31, 2019, primarily due to the loss on our crop derivatives compared to a crop derivative gain in the prior year.

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Overseas General Insurance

Overseas General Insurance segment comprises Chubb International and Chubb Global Markets (CGM). Chubb International comprises our international commercial P&C traditional and specialty lines serving large corporations, middle market and small customers; A&H and traditional and specialty personal lines business serving local territories outside the U.S., Bermuda, and Canada. CGM, our London-based international commercial P&C excess and surplus lines business, includes Lloyd's of London (Lloyd's) Syndicate 2488. Chubb provides funds at Lloyd's to support underwriting by Syndicate 2488 which is managed by Chubb Underwriting Agencies Limited.

	Three Months Ended
	March 31						% Change
(in millions of U.S. dollars, except for percentages)	2019			2018			Q-19 vs. Q-18
Net premiums written (1)	$	2,395		$	2,384		0.4		%
Net premiums earned	2,114			2,107			0.3		%
Losses and loss expenses	1,106			1,078			2.6		%
Policy acquisition costs	596			588			1.4		%
Administrative expenses	249			239			3.8		%
Underwriting income (1)	163			202			(19.4		)%
Net investment income	144			151			(4.4		)%
Other (income) expense	4			7			(44.4		)%
Amortization of purchased intangibles	11			10			11.2		%
Segment income	$	292		$	336		(13.1		)%
Loss and loss expense ratio	52.3		%	51.1		%	1.2	pts
Policy acquisition cost ratio	28.2		%	27.9		%	0.3	pts
Administrative expense ratio	11.8		%	11.4		%	0.4	pts
Combined ratio	92.3		%	90.4		%	1.9	pts

⁽¹⁾  On a constant-dollar basis, for the three months ended March 31, 2019, net premiums written increased$136 million, or 6.0 percent, and underwriting income decreased$21 million, or 11.6 percent. Amounts are calculated by translating prior period results using the same local currency rates as the comparable current period.

Premiums

For the three months ended March 31, 2019, net premiums written increased$11 million, or $136 million (6.0 percent) on a constant-dollar basis, reflecting growth across all regions and lines of business. P&C lines growth was principally due to new business in small commercial property and general casualty lines, middle market, and excess and surplus lines. Personal lines growth was driven by new business. Accident and health (A&H) lines growth was principally in Asia and Latin America driven by new business.

For the three months ended March 31, 2019, net premiums earned increased$7 million, or $126 million (6.3 percent) on a constant-dollar basis, reflecting the increase in net premiums written.

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Net Premiums Written by Region

	Three Months Ended March 31										% Change
(in millions of U.S. dollars, except for percentages)	2019		2019 % of Total		2018		2018 % of Total		C$ (1) 2018		Q-19 vs. Q-18		C$ (1) Q-19 vs. Q-18
Region
Europe	$	1,106	46	%	$	1,110	47	%	$	1,062	(0.4	)%	4.2	%
Latin America	533		22	%	528		22	%	472		1.0	%	12.8	%
Asia	669		28	%	657		28	%	640		1.7	%	4.5	%
Other (2)	87		4	%	89		3	%	85		(1.9	)%	3.0	%
Net premiums written	$	2,395	100	%	$	2,384	100	%	$	2,259	0.4	%	6.0	%

⁽¹⁾  On a constant-dollar basis. Amounts are calculated by translating prior period results using the same local currency exchange rates as the comparable current period. 

⁽²⁾  Comprises Combined International, Eurasia and Africa region, and other international.

Combined Ratio

The loss and loss expense ratio increased1.2 percentage points for the three months ended March 31, 2019, primarily due to higher catastrophe losses and lower favorable prior period development.

The policy acquisition cost ratio increased0.3 percentage points for the three months ended March 31, 2019, primarily due to higher deferrable underwriting costs resulting from the successful acquisition of business.

The administrative expense ratio increased0.4 percentage points for the three months ended March 31, 2019, primarily driven by higher employee merit and benefit-related expenses and increased spending to support growth, partially offset by higher deferrable underwriting costs as noted above.

Catastrophe Losses and Prior Period Development

	Three Months Ended
	March 31
(in millions of U.S. dollars)	2019		2018
Catastrophe losses	$	25	$	15
Favorable prior period development	$	4	$	22

Catastrophe losses through March 31, 2019 and 2018 were primarily from the following events (refer to table on page 45):

• 2019: Storms in Australia and other international weather-related events

• 2018: Severe weather-related events in Europe

Refer to the prior period development discussion in Footnote 4 to the Consolidated Financial Statements for additional information.

CAY Loss Ratio excluding Catastrophe Losses

	Three Months Ended
	March 31
	2019		2018
Loss and loss expense ratio	52.3	%	51.1	%
Catastrophe losses	(1.2	)%	(0.7	)%
Prior period development	0.2	%	1.0	%
CAY loss ratio excluding catastrophe losses	51.3	%	51.4	%

The CAY loss ratio excluding catastrophe losses remained relatively flat for the three months ended March 31, 2019.

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Global Reinsurance

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

	Three Months Ended
	March 31						% Change
(in millions of U.S. dollars, except for percentages)	2019			2018			Q-19 vs. Q-18
Net premiums written	$	202		$	193		4.4			%
Net premiums earned	168			168			0.1			%
Losses and loss expenses	76			67			14.0			%
Policy acquisition costs	43			40			7.5			%
Administrative expenses	10			10			(1.8			)%
Underwriting income	39			51			(23.6			)%
Net investment income	56			64			(11.3			)%
Other (income) expense	(9		)	(7		)	19.5			%
Segment income	$	104		$	122		(14.7			)%
Loss and loss expense ratio	45.7		%	40.1		%	5.6		pts
Policy acquisition cost ratio	25.4		%	23.6		%	1.8		pts
Administrative expense ratio	5.7		%	5.8		%	(0.1	)	pts
Combined ratio	76.8		%	69.5		%	7.3		pts

Premiums

For the three months ended March 31, 2019, net premiums written increased$9 million, or $12 million (6.4 percent) on a constant-dollar basis, primarily due to new business written in marine and property lines, and the timing of homeowners business, which was previously written mainly in the third quarter of 2018. This increase was partially offset by lower net renewals primarily in the motor line, which were reflective of competitive market conditions and higher ceded retrocessions principally in property catastrophe lines mainly due to timing.

For the three months ended March 31, 2019, net premiums earned remained flat or increased$4 million (2.6 percent) on a constant-dollar basis, reflecting the increase in net premiums written.

Combined Ratio

The loss and loss expense ratio increased5.6 percentage points for the three months ended March 31, 2019, principally due to lower favorable prior period development and a change in mix of business reflecting proportionally lower premiums earned from property catastrophe business, which has a low loss ratio. Lower catastrophe losses partially offset the increase.

The policy acquisition cost ratio increased1.8 percentage points for the three months ended March 31, 2019, primarily due to a change in mix of business reflecting proportionally lower premiums earned from property catastrophe business and increased excess of loss ceded retrocessions, for which we receive no cede commission benefit. In addition, the prior year benefited from a reduction in policy acquisition costs on treaties with adjustable commission features.

The administrative expense ratio remained relatively flat for the three months ended March 31, 2019.

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Catastrophe Losses and Prior Period Development

	Three Months Ended
	March 31
(in millions of U.S dollars)	2019		2018
Catastrophe losses	$	—	$	2
Favorable prior period development	$	8	$	14

Refer to the prior period development discussion in Footnote 4 to the Consolidated Financial Statements for additional information.

CAY Loss Ratio excluding Catastrophe Losses

	Three Months Ended
	March 31
	2019		2018
Loss and loss expense ratio	45.7	%	40.1	%
Catastrophe losses	—		(1.2	)%
Prior period development	4.8	%	8.8	%
CAY loss ratio excluding catastrophe losses	50.5	%	47.7	%

The CAY loss ratio excluding catastrophe losses increased2.8 percentage points for the three months ended March 31, 2019, primarily due to a change in mix of business reflecting proportionally lower premiums earned from property catastrophe business.

Life Insurance

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

	Three Months Ended
	March 31						% Change
(in millions of U.S. dollars, except for percentages)	2019			2018			Q-19 vs. Q-18
Net premiums written	$	579		$	559		3.5	%
Net premiums earned	561			540			3.9	%
Losses and loss expenses	202			205			(1.5	)%
Policy benefits (1)	196			151			29.8	%
(Gains) losses from fair value changes in separate account assets (1)	(30		)	(6		)	389.7	%
Policy acquisition costs	128			128			0.1	%
Administrative expenses	79			78			0.2	%
Net investment income	89			83			8.3	%
Life Insurance underwriting income	75			67			14.5	%
Other (income) expense (1)	(10		)	2			NM
Amortization of purchased intangibles	—			1			NM
Segment income	$	85		$	64		33.9	%

NM – not meaningful

⁽¹⁾  (Gains) losses from fair value changes in separate account assets that do not qualify for separate account reporting under GAAP have been reclassified from Other (income) expense for purposes of presenting Life Insurance underwriting income. The offsetting movement in the separate account liabilities is included in Policy benefits.

55

Premiums

For the three months ended March 31, 2019, net premiums written increased $20 million, or $29 million (5.2 percent) on a constant-dollar basis, primarily reflecting growth in our North American Combined Insurance supplemental A&H program and Asian and Latin American international life operations, partially offset by our life reinsurance business, which continues to decline as no new life reinsurance business is currently being written.

Deposits

The following table presents deposits collected on universal life and investment contracts:

	Three Months Ended
	March 31						% Change
(in millions of U.S. dollars, except for percentages)	2019		2018		C$ (1) 2018		Q-19 vs. Q-18		C$ (1)Q-19 vs. Q-18
Deposits collected on Universal life and investment contracts	$	321	$	379	$	366	(15.1	)%	(12.3	)%

⁽¹⁾  On a constant-dollar basis. Amounts are calculated by translating prior period results using the same local currency exchange rates as the comparable current period. 

Deposits collected on universal life and investment contracts (life deposits) are not reflected as revenues in our Consolidated statements of operations in accordance with GAAP. New life deposits are an important component of production, and although they do not significantly affect current period income from operations, they are key to our efforts to grow our business. Life deposits collected decreased for the three months ended March 31, 2019, primarily due to a decline in Taiwan driven by competitive market conditions, partially offset by growth in Hong Kong and Vietnam.

Life Insurance underwriting income and Segment income

Life Insurance underwriting income increased $8 million for the three months ended March 31, 2019, principally reflecting growth as described above, and an increase in net investment income. Additionally, the increase in segment income was also due to our share of net income from our partially-owned life insurance entities of $12 million, including a one-time favorable adjustment of $7 million.

Corporate

Corporate results primarily include the results of our non-insurance companies, income and expenses not attributable to reportable segments and loss and loss expenses of asbestos and environmental (A&E) liabilities.

	Three Months Ended
	March 31						% Change
(in millions of U.S. dollars, except for percentages)	2019			2018			Q-19 vs. Q-18
Losses and loss expenses	$	11		$	11		—
Administrative expenses	63			72			(12.0	)%
Underwriting loss	74			83			(10.8	)%
Net investment income (loss)	(37		)	(61		)	(37.9	)%
Interest expense	140			157			(10.8	)%
Net realized gains (losses)	(96		)	(4		)	NM
Other (income) expense	11			(37		)	NM
Amortization expense of purchased intangibles	55			64			(14.5	)%
Chubb integration expenses	3			10			(69.3	)%
Income tax expense	188			135			39.4	%
Net loss	$	(604	)	$	(477	)	26.9	%

NM - not meaningful

Losses and loss expenses in both years were primarily related to unallocated loss adjustment expenses of the A&E claim operations.

56

Administrative expenses decreased$9 million for the three months ended March 31, 2019, primarily due to lower employee incentive compensation costs.

Chubb integration expenses are one-time in nature and are not related to the on-going business activities of the segments. The Chief Executive Officer does not manage segment results or allocate resources to segments when considering these costs and they are therefore excluded from our definition of segment income. Chubb integration expenses were $3 million and $10 million for the three months ended March 31, 2019 and 2018, respectively, and principally consisted of personnel-related expenses.

Refer to the respective sections for a discussion of Net investment income, Interest expense, Other (income) expense, Net realized gains and losses, Amortization of purchased intangibles, and Income tax expense.

Effective Income Tax Rate

Our effective income tax rate reflects a mix of income or losses in jurisdictions with a wide range of tax rates, permanent differences between US GAAP and local tax laws, and the timing of recording discrete items. A change in the geographic mix of earnings could impact our effective tax rate. For the three months ended March 31, 2019 and 2018, our effective income tax rate was 15.3 percent and 11.1 percent, respectively. The effective income tax rate of 15.3 percent in the current year was higher compared to the prior year primarily due to a higher percentage of income generated in higher taxing jurisdictions, a higher percentage of realized losses generated in lower taxing jurisdictions, lower amounts of tax-exempt income and a decrease in discrete tax benefits associated with stock-based compensation.

Non-GAAP Reconciliation

In presenting our results, we included and discussed certain non-GAAP measures. These non-GAAP measures, which may be defined differently by other companies, are important for an understanding of our overall results of operations and financial condition. However, they should not be viewed as a substitute for measures determined in accordance with generally accepted accounting principles (GAAP).

We provide financial measures, including net premiums written, net premiums earned, and underwriting income on a constant-dollar basis. We believe it is useful to evaluate the trends in our results exclusive of the effect of fluctuations in exchange rates between the U.S. dollar and the currencies in which our international business is transacted, as these exchange rates could fluctuate significantly between periods and distort the analysis of trends. The impact is determined by assuming constant foreign exchange rates between periods by translating prior period results using the same local currency exchange rates as the comparable current period.

P&C performance metrics comprise consolidated operating results (including Corporate) and exclude the operating results of the Life Insurance segment. We believe that these measures are useful and meaningful to investors as they are used by management to assess the company’s P&C operations which are the most economically similar. We exclude the Life Insurance segment because the results of this business do not always correlate with the results of our P&C operations.

P&C combined ratio is the sum of the loss and loss expense ratio, acquisition cost ratio and the administrative expense ratio excluding the life business and including the realized gains and losses on the crop derivatives. These derivatives were purchased to provide economic benefit, in a manner similar to reinsurance protection, in the event that a significant decline in commodity pricing impacts underwriting results. We view gains and losses on these derivatives as part of the results of our underwriting operations.

CAY P&C combined ratio excluding catastrophe losses (CATs) excludes CATs and prior period development (PPD) from the P&C combined ratio. We exclude CATs as they are not predictable as to timing and amount and PPD as these unexpected loss developments on historical reserves are not indicative of our current underwriting performance. The combined ratio numerator is adjusted to exclude CATs, net premiums earned adjustments on PPD, prior period expense adjustments and reinstatement premiums on PPD, and the denominator is adjusted to exclude net premiums earned adjustments on PPD and reinstatement premiums on CATs and PPD. In periods where there are adjustments on loss sensitive policies, these adjustments are excluded from PPD and net premiums earned when calculating the ratios. We believe this measure provides a better evaluation of our underwriting performance and enhances the understanding of the trends in our P&C business that may be obscured by these items. This measure is commonly reported among our peer companies and allows for a better comparison.

57

Reinstatement premiums are additional premiums paid on certain reinsurance agreements in order to reinstate coverage that had been exhausted by loss occurrences. The reinstatement premium amount is typically a pro rata portion of the original ceded premium paid based on how much of the reinsurance limit had been exhausted.

Net premiums earned adjustments within PPD are adjustments to the initial premium earned on retrospectively rated policies based on actual claim experience that develops after the policy period ends. The premium adjustments correlate to the prior period loss development on these same policies and are fully earned in the period the adjustments are recorded.

Prior period expense adjustments typically relate to adjustable commission reserves or policyholder dividend reserves based on actual claim experience that develops after the policy period ends. The expense adjustments correlate to the prior period loss development on these same policies.

For this disclosure purpose, the normalized level of CATs, or expected level of CATs, is not intended to represent a probability weighted expectation for the company but rather to represent management’s view of what might be more typical for a given period, based on various factors, including historical experience, seasonal patterns, and consideration of both modeled CATs (e.g., windstorm and earthquake) as well as non-modeled CATs (e.g., wildfires, floods and freeze). For the three months ended March 31, 2019 and 2018, based on these and other factors, the expected level of pre-tax CATs was $206 million and $205 million, respectively, resulting in CATs above expected level of $44 million and $175 million, respectively.

The following tables present the calculation of combined ratio, as reported for each segment to P&C combined ratio, adjusted for catastrophe losses (CATs) and PPD:

58

		North America Commercial P&C Insurance			North America Personal P&C Insurance			North America Agricultural Insurance			Overseas General Insurance			Global Reinsurance			Corporate			Total P&C
Three Months Ended
March 31, 2019
(in millions of U.S. dollars except for ratios)
Numerator
Losses and loss expenses
Losses and loss expenses		$	1,973		$	757		$	(27	)	$	1,106		$	76		$	11		$	3,896
Realized (gains) losses on crop derivatives		—			—			1			—			—			—			1
Adjusted losses and loss expenses	A	$	1,973		$	757		$	(26	)	$	1,106		$	76		$	11		$	3,897
Catastrophe losses		(94		)	(129		)	(2		)	(25		)	—			—			(250		)
PPD and related adjustments
PPD, net of related adjustments - favorable (unfavorable)		131			10			61			4			8			(10		)	204
Net premiums earned adjustments on PPD - unfavorable (favorable)		2			—			32			—			—			—			34
Expense adjustments - unfavorable (favorable)		(4		)	—			(3		)	—			—			—			(7		)
PPD reinstatement premiums - unfavorable (favorable)		—			(3		)	—			—			—			—			(3		)
PPD - gross of related adjustments - favorable (unfavorable)		129			7			90			4			8			(10		)	228
CAY loss and loss expense ex CATs	B	$	2,008		$	635		$	62		$	1,085		$	84		$	1		$	3,875
Policy acquisition costs and administrative expenses
Policy acquisition costs and administrative expenses	C	$	699		$	299		$	8		$	845		$	53		$	63		$	1,967
Expense adjustments - favorable (unfavorable)		4			—			3			—			—			—			7
Policy acquisition costs and administrative expenses, adjusted	D	$	703		$	299		$	11		$	845		$	53		$	63		$	1,974
Denominator
Net premiums earned	E	$	3,085		$	1,154		$	55		$	2,114		$	168					$	6,576
Net premiums earned adjustments on PPD - unfavorable (favorable)		2			—			32			—			—						34
PPD reinstatement premiums - unfavorable (favorable)		—			(3		)	—			—			—						(3		)
Net premiums earned excluding adjustments	F	$	3,087		$	1,151		$	87		$	2,114		$	168					$	6,607
P&C Combined ratio
Loss and loss expense ratio	A/E	63.9		%	65.5		%	(48.3		)%	52.3		%	45.7		%				59.3		%
Policy acquisition costs and administrative expense ratio	C/E	22.7		%	26.0		%	14.7		%	40.0		%	31.1		%				29.9		%
P&C Combined ratio		86.6		%	91.5		%	(33.6		)%	92.3		%	76.8		%				89.2		%
CAY P&C Combined ratio ex CATs
Loss and loss expense ratio, adjusted	B/F	65.0		%	55.1		%	71.1		%	51.3		%	50.5		%				58.6		%
Policy acquisition costs and administrative expense ratio, adjusted	D/F	22.8		%	26.0		%	12.8		%	40.0		%	31.0		%				29.9		%
CAY P&C Combined ratio ex CATs		87.8		%	81.1		%	83.9		%	91.3		%	81.5		%				88.5		%
Combined ratio
Combined ratio																				89.2		%
Add: impact of gains and losses on crop derivatives																				—
P&C Combined ratio																				89.2		%
Note: The ratios above are calculated using whole U.S. dollars. Accordingly, calculations using rounded amounts may differ. Letters A, B, C, D, E, and F included in the table are references for calculating the ratios above.

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		North America Commercial P&C Insurance			North America Personal P&C Insurance			North America Agricultural Insurance			Overseas General Insurance			Global Reinsurance			Corporate			Total P&C
Three Months Ended
March 31, 2018
(in millions of U.S. dollars except for ratios)
Numerator
Losses and loss expenses
Losses and loss expenses		$	1,908		$	886		$	(53	)	$	1,078		$	67		$	11		$	3,897
Realized (gains) losses on crop derivatives		—			—			(2		)	—			—			—			(2		)
Adjusted losses and loss expenses	A	$	1,908		$	886		$	(55	)	$	1,078		$	67		$	11		$	3,895
Catastrophe losses		(78		)	(284		)	(1		)	(15		)	(2		)	—			(380		)
PPD and related adjustments
PPD, net of related adjustments - favorable (unfavorable)		101			6			76			22			14			(10		)	209
Net premiums earned adjustments on PPD - unfavorable (favorable)		—			—			40			—			1			—			41
Expense adjustments - unfavorable (favorable)		6			—			(4		)	—			—			—			2
PPD reinstatement premiums - unfavorable (favorable)		4			—			—			—			—			—			4
PPD - gross of related adjustments - favorable (unfavorable)		111			6			112			22			15			(10		)	256
CAY loss and loss expense ex CATs	B	$	1,941		$	608		$	56		$	1,085		$	80		$	1		$	3,771
Policy acquisition costs and administrative expenses
Policy acquisition costs and administrative expenses	C	$	703		$	302		$	(4	)	$	827		$	50		$	72		$	1,950
Expense adjustments - favorable (unfavorable)		(6		)	—			4			—			—			—			(2		)
Policy acquisition costs and administrative expenses, adjusted	D	$	697		$	302		$	—		$	827		$	50		$	72		$	1,948
Denominator
Net premiums earned	E	$	3,029		$	1,140		$	43		$	2,107		$	168					$	6,487
Net premiums earned adjustments on PPD - unfavorable (favorable)		—			—			40			—			1						41
PPD reinstatement premiums - unfavorable (favorable)		4			—			—			—			—						4
Net premiums earned excluding adjustments	F	$	3,033		$	1,140		$	83		$	2,107		$	169					$	6,532
P&C Combined ratio
Loss and loss expense ratio	A/E	63.0		%	77.7		%	(127.6		)%	51.1		%	40.1		%				60.0		%
Policy acquisition costs and administrative expense ratio	C/E	23.2		%	26.5		%	(10.7		)%	39.3		%	29.4		%				30.1		%
P&C Combined ratio		86.2		%	104.2		%	(138.3		)%	90.4		%	69.5		%				90.1		%
CAY P&C Combined ratio ex CATs
Loss and loss expense ratio, adjusted	B/F	64.0		%	53.3		%	68.9		%	51.4		%	47.7		%				57.7		%
Policy acquisition costs and administrative expense ratio, adjusted	D/F	23.0		%	26.4		%	(1.2		)%	39.3		%	29.3		%				29.9		%
CAY P&C Combined ratio ex CATs		87.0		%	79.7		%	67.7		%	90.7		%	77.0		%				87.6		%
Combined ratio
Combined ratio																				90.1		%
Add: impact of gains and losses on crop derivatives																				—
P&C Combined ratio																				90.1		%
Note: The ratios above are calculated using whole U.S. dollars. Accordingly, calculations using rounded amounts may differ. Letters A, B, C, D, E, and F included in the table are references for calculating the ratios above.

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Other Income and Expense

	Three Months Ended
	March 31
(in millions of U.S. dollars)	2019			2018
Equity in net (income) loss of partially-owned entities	$	(22	)	$	(59	)
(Gains) losses from fair value changes in separate account assets (1)	(30		)	(6		)
Federal excise and capital taxes	6			3
Other	7			15
Other (income) expense	$	(39	)	$	(47	)

⁽¹⁾   Related to (gains) losses from fair value changes in separate account assets that do not qualify for separate account reporting under GAAP.

Other (income) expense includes equity in net (income) loss of partially-owned entities, which includes our share of net (income) loss related to partially-owned investment companies (private equity) and partially-owned insurance companies. Also included in Other (income) expense are (Gains) losses from fair value changes in separate account assets that do not qualify for separate account reporting under GAAP. The offsetting movement in the separate account liabilities is included in Policy benefits in the Consolidated statements of operations. Certain federal excise and capital taxes incurred as a result of capital management initiatives are included in Other (income) expense as these are considered capital transactions and are excluded from underwriting results.

Amortization of purchased intangibles and Other amortization

Amortization expense related to purchased intangibles was $76 million for the three months ended March 31, 2019, compared with $85 million in the prior year period. The decrease in amortization expense of purchased intangibles reflects lower intangible amortization expense related to agency distribution relationships and renewal rights and no expense related to internally developed software, which was fully amortized in 2018, partially offset by a lower amortization benefit from the fair value adjustment on unpaid losses and loss expenses.

Amortization expense for the remainder of 2019 is expected to be $228 million, or $76 million each quarter.

The following table presents, as of March 31, 2019, the estimated pre-tax amortization expense (benefit) of purchased intangibles, at current foreign currency exchange rates, for the second through fourth quarters of 2019 and the next five years:

	Associated with the Chubb Corp Acquisition
For the Years Ending December 31 (in millions of U.S. dollars)	Agency distribution relationships and renewal rights		Fair value adjustment on Unpaid losses and loss expenses			Total (1)		Other intangible assets (2)		Total Amortization of purchased intangibles
Second quarter of 2019	$	70	$	(15	)	$	55	$	21	$	76
Third quarter of 2019	70		(15		)	55		21		76
Fourth quarter of 2019	70		(15		)	55		21		76
2020	239		(35		)	204		83		287
2021	216		(20		)	196		75		271
2022	196		(15		)	181		70		251
2023	178		(7		)	171		66		237
2024	160		(6		)	154		60		214
Total	$	1,199	$	(128	)	$	1,071	$	417	$	1,488

⁽¹⁾  Recorded in Corporate.

⁽²⁾  Recorded in applicable segment(s) that acquired the intangible assets.

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Reduction of deferred tax liability associated with intangible assets related to Other intangible assets (excluding the fair value adjustment on Unpaid losses and loss expense)

At March 31, 2019, the deferred tax liability associated with Other intangible assets (excluding the fair value adjustment on Unpaid losses and loss expense) was $1,349 million.

The following table presents, as of March 31, 2019, the expected reduction of the deferred tax liability associated with Other intangible assets (which reduces as agency distribution relationships and renewal rights and other intangible assets amortize), at current foreign currency exchange rates, for the second through fourth quarters of 2019 and for the next five years:

For the Years Ending December 31 (in millions of U.S. dollars)	Reduction to deferred tax liability associated with intangible assets
Second quarter of 2019	$	20
Third quarter of 2019	20
Fourth quarter of 2019	20
2020	71
2021	64
2022	59
2023	54
2024	49
Total	$	357

Amortization of the fair value adjustment on acquired invested assets and assumed long-term debt

The following table presents at March 31, 2019, the expected amortization expense of the fair value adjustment on acquired invested assets, at current foreign currency exchange rates, and the expected amortization benefit from the amortization of the fair value adjustment on assumed long-term debt for the second through fourth quarters of 2019 and for the next five years:

	Amortization (expense) benefit of the fair value adjustment on
For the Years Ending December 31 (in millions of U.S. dollars)	Acquired invested assets (1)			Assumed long-term debt (2)
Second quarter of 2019	$	(45	)	$	5
Third quarter of 2019	(42		)	5
Fourth quarter of 2019	(40		)	6
2020	(150		)	21
2021	(135		)	21
2022	(53		)	21
2023	—			21
2024	—			21
Total	$	(465	)	$	121

⁽¹⁾  Recorded as a reduction to Net investment income in the Consolidated statements of operations.

⁽²⁾  Recorded as a reduction to Interest expense in the Consolidated statements of operations.

The estimate of amortization expense of the fair value adjustment on acquired invested assets could vary materially based on current market conditions, bond calls, overall duration of the acquired investment portfolio, and foreign exchange.

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Interest Expense

The following table presents the estimated interest expense for the remainder of 2019 based on our existing debt obligations as well as fees based on our expected usage of certain facilities including letters of credit, collateral fees, and repurchase agreements.

Our estimated fixed interest expense, at current foreign currency exchange rates, is based on outstanding debt obligations during the period. We plan to redeem the $500 million 5.9 percent senior note on June 15, 2019, therefore, no interest expense is included after the date of redemption.

Our estimated variable interest expense is based on expected usage and interest rates and may fluctuate. These interest expenses include: fees on collateral, repurchase agreements, and credit facilities.

										Estimated Interest Expense
	First Quarter			Second Quarter			Third Quarter			Fourth Quarter			Full Year
(in millions of U.S. dollars)	2019			2019			2019			2019			2019
Fixed interest expense based on outstanding debt	$	124		$	122		$	116		$	117		$	479
Variable interest expense based on expected usage	21			24			25			26			96
Adjusted interest expense	$	145		$	146		$	141		$	143		$	575
Amortization of the fair value of debt related to the Chubb Corp acquisition	(5		)	(5		)	(5		)	(6		)	(21		)
Total interest expense, including amortization of the fair value of debt	$	140		$	141		$	136		$	137		$	554

										Actual Interest Expense
	First Quarter			Second Quarter			Third Quarter			Fourth Quarter			Full Year
(in millions of U.S. dollars)	2018			2018			2018			2018			2018
Fixed interest expense based on outstanding debt	$	140		$	131		$	125		$	124		$	520
Variable interest expense	29			46			45			34			154
Adjusted interest expense	$	169		$	177		$	170		$	158		$	674
Amortization of the fair value of debt related to the Chubb Corp acquisition	(12		)	(10		)	(6		)	(5		)	(33		)
Total interest expense, including amortization of the fair value of debt	$	157		$	167		$	164		$	153		$	641

Net Investment Income

	Three Months Ended
	March 31
(in millions of U.S. dollars)	2019			2018
Fixed maturities (1)	$	820		$	772
Short-term investments	24			20
Other interest income (2)	6			28
Equity securities	7			8
Other investments	22			19
Gross investment income	879			847
Investment expenses	(43		)	(41		)
Net investment income	$	836		$	806
(1)Includes amortization expense related to fair value adjustment on acquired invested assets related to the Chubb Corp acquisition	$	(46	)	$	(71	)

⁽²⁾  Other interest income includes interest earned from operating cash held outside the investment portfolio and also cash held in our global multi-currency notional cash pooling programs. Other interest income fluctuates based on changing interest rates and cash balances.

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Net investment income is influenced by a number of factors including the amounts and timing of inward and outward cash flows, the level of interest rates, and changes in overall asset allocation. Net investment income increased 3.7 percent for the three months ended March 31, 2019, compared with the prior year period. The increase was primarily due to higher average invested assets and reinvestment rates on new and reinvested assets, partially offset by a reduction in the usage of notional cash pooling programs and unfavorable foreign exchange across all markets.

Net Realized and Unrealized Gains (Losses)

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

The effect of market movements on our fixed maturities portfolio impacts Net income (through Net realized gains (losses)) when securities are sold or when we record an Other-than-temporary impairment (OTTI) charge. For a further discussion related to how we assess OTTI for our fixed maturities, including credit-related OTTI, and the related impact on Net income, refer to Note 2 b) to the Consolidated Financial Statements. Additionally, Net income is impacted through the reporting of changes in the fair value of equity securities and private equity securities where we own less than three percent and derivatives, including financial futures, options, swaps, and GLB reinsurance. Changes in unrealized appreciation and depreciation on available for sale securities, resulting from the revaluation of securities held, changes in cumulative foreign currency translation adjustment, and unrealized postretirement benefit liability adjustment, are reported as separate components of Accumulated other comprehensive income (loss) in Shareholders’ equity in the Consolidated balance sheets.

	Three Months Ended March 31, 2019									Three Months Ended March 31, 2018
(in millions of U.S. dollars)	Net Realized Gains (Losses)			Net Unrealized Gains (Losses)			Net Impact			Net Realized Gains (Losses)			Net Unrealized Gains (Losses)			Net Impact
Fixed maturities	$	(44	)	$	1,889		$	1,845		$	(23	)	$	(1,211	)	$	(1,234	)
Fixed income and equity derivatives	(130		)	—			(130		)	17			—			17
Public equity	1			—			1			10			—			10
Private equity	(2		)	—			(2		)	—			—			—
Mark-to-market on public and private equity	15			—			15			8			—			8
Total investment portfolio (1)	(160		)	1,889			1,729			12			(1,211		)	(1,199		)
Variable annuity reinsurance derivative transactions, net of applicable hedges	51			—			51			60			—			60
Other derivatives	(1		)	—			(1		)	2			—			2
Foreign exchange	13			147			160			(77		)	397			320
Other	—			(27		)	(27		)	1			(23		)	(22		)
Net gains (losses), pre-tax	$	(97	)	$	2,009		$	1,912		$	(2	)	$	(837	)	$	(839	)

⁽¹⁾  For the three months ended March 31, 2019, other-than-temporary impairments in Net realized gains (losses) included $13 million for fixed maturities. For the three months ended March 31, 2018, other-than-temporary impairments in Net realized gains (losses) included $1 million for fixed maturities.

The variable annuity reinsurance derivative transactions resulted in realized gains of $51 million for the three months ended March 31, 2019, reflecting a net decrease in the fair value of GLB liabilities of $114 million. The decrease in the fair value of GLB liabilities was primarily due to higher global equity market levels, partially offset by lower interest rates. In addition, we maintain positions in derivative instruments that decrease in fair value when the S&P 500 index increases. There were realized losses of $63 million related to these derivative instruments.

The variable annuity reinsurance derivative transactions resulted in realized gains of $60 million for the three months ended March 31, 2018, reflecting a net decrease in the fair value of GLB liabilities of $38 million. The decrease in the fair value of GLB liabilities was primarily due to rising interest rates, partially offset by lower equity market levels. In addition, we maintain positions in derivative instruments that decrease in fair value when the S&P 500 index increases. There were realized gains of $22 million related to these derivative instruments.

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Investments

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

The average duration of our fixed income securities, including the effect of options and swaps, was 3.6 years and 3.7 years at March 31, 2019 and December 31, 2018, respectively. We estimate that a 100 basis point (bps) increase in interest rates would reduce the valuation of our fixed income portfolio by approximately $3.5 billion at March 31, 2019.

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

	March 31, 2019				December 31, 2018
(in millions of U.S. dollars)	Fair Value		Cost/ Amortized Cost		Fair Value		Cost/ Amortized Cost
Fixed maturities available for sale	$	80,663	$	79,624	$	78,470	$	79,323
Fixed maturities held to maturity	13,240		13,136		13,259		13,435
Short-term investments	3,078		3,078		3,016		3,016
	96,981		95,838		94,745		95,774
Equity securities	821		821		770		770
Other investments	5,562		5,562		5,277		5,277
Total investments	$	103,364	$	102,221	$	100,792	$	101,821

The fair value of our total investments increased $2.6 billion during the three months endedMarch 31, 2019, primarily due to unrealized appreciation driven by declining interest rates and the investing of operating cash flows. This increase was partially offset by the payment of dividends on our Common Shares and share repurchases.

65

The following tables present the market value of our fixed maturities and short-term investments at March 31, 2019 and December 31, 2018. The first table lists investments according to type and second according to S&P credit rating:

	March 31, 2019				December 31, 2018
(in millions of U.S. dollars, except for percentages)	Market Value		% of Total		Market Value		% of Total
Treasury	$	4,551	5	%	$	4,799	5	%
Agency	392		—		528		1	%
Corporate and asset-backed securities	30,364		31	%	29,091		31	%
Mortgage-backed securities	18,924		20	%	18,026		19	%
Municipal	15,796		16	%	16,327		17	%
Non-U.S.	23,876		25	%	22,958		24	%
Short-term investments	3,078		3	%	3,016		3	%
Total	$	96,981	100	%	$	94,745	100	%
AAA	$	14,917	16	%	$	14,571	15	%
AA	37,023		38	%	36,715		39	%
A	17,867		19	%	17,253		18	%
BBB	11,961		12	%	12,035		13	%
BB	8,807		9	%	8,363		9	%
B	6,148		6	%	5,596		6	%
Other	258		—		212		—
Total	$	96,981	100	%	$	94,745	100	%

Corporate and asset-backed securities

The following table presents our 10 largest global exposures to corporate bonds by market value at March 31, 2019:

(in millions of U.S. dollars)	Market Value
Wells Fargo & Co	$	578
Bank of America Corp	518
JP Morgan Chase & Co	479
Comcast Corp	380
HSBC Holdings Plc	354
Verizon Communications Inc	336
Anheuser-Busch InBev NV	334
Citigroup Inc	327
AT&T Inc	316
Morgan Stanley	302

Mortgage-backed securities

	S&P Credit Rating										Market  Value		Amortized Cost
March 31, 2019 (in millions of U.S. dollars)	AAA		AA		A		BBB		BB and below		Total		Total
Agency residential mortgage-backed (RMBS)	$	—	$	15,505	$	—	$	—	$	—	$	15,505	$	15,442
Non-agency RMBS	25		47		69		27		20		188		187
Commercial mortgage-backed	2,877		249		105		—		—		3,231		3,224
Total mortgage-backed securities	$	2,902	$	15,801	$	174	$	27	$	20	$	18,924	$	18,853

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Municipal

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

Non-U.S.

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

Our non-U.S. investment grade fixed income portfolios are currency-matched with the insurance liabilities of our non-U.S. operations. The average credit quality of our non-U.S. fixed income securities is A and 51 percent of our holdings are rated AAA or guaranteed by governments or quasi-government agencies. Within the context of these investment portfolios, our government and corporate bond holdings are highly diversified across industries and geographies. Issuer limits are based on credit rating (AA—two percent, A—one percent, BBB—0.5 percent of the total portfolio) and are monitored daily via an internal compliance system. We manage our indirect exposure using the same credit rating based investment approach. Accordingly, we do not believe our indirect exposure is material.

The following table summarizes the market value and amortized cost of our non-U.S. fixed income portfolio by country/sovereign for non-U.S. government securities at March 31, 2019: 

(in millions of U.S. dollars)	Market Value		Amortized Cost
United Kingdom	$	1,138	$	1,115
Republic of Korea	1,088		975
Canada	841		833
Federative Republic of Brazil	763		747
Province of Ontario	668		658
United Mexican States	563		567
Kingdom of Thailand	506		480
Province of Quebec	490		482
Commonwealth of Australia	324		292
Federal Republic of Germany	308		292
Other Non-U.S. Government Securities (1)	4,541		4,421
Total	$	11,230	$	10,862

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

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The following table summarizes the market value and amortized cost of our non-U.S. fixed income portfolio by country/sovereign for non-U.S. corporate securities at March 31, 2019: 

(in millions of U.S. dollars)	Market Value		Amortized Cost
United Kingdom	$	1,995	$	1,953
Canada	1,545		1,527
United States (1)	1,184		1,170
France	957		933
Australia	833		814
Netherlands	679		667
Germany	534		521
Japan	519		515
Switzerland	460		452
China	375		369
Other Non-U.S. Corporate Securities	3,565		3,516
Total	$	12,646	$	12,437

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

Below-investment grade corporate fixed income portfolio

Below-investment grade securities have different characteristics than investment grade corporate debt securities. Risk of loss from default by the borrower is greater with below-investment grade securities. Below-investment grade securities are generally unsecured and are often subordinated to other creditors of the issuer. Also, issuers of below-investment grade securities usually have higher levels of debt and are more sensitive to adverse economic conditions, such as recession or increasing interest rates, than investment grade issuers. At March 31, 2019, our corporate fixed income investment portfolio included below-investment grade and non-rated securities which, in total, comprised approximately 14 percent of our fixed income portfolio. Our below-investment grade and non-rated portfolio includes over 1,200 issuers, with the greatest single exposure being $147 million.

We manage high-yield bonds as a distinct and separate asset class from investment grade bonds. The allocation to high-yield bonds is explicitly set by internal management and is targeted to securities in the upper tier of credit quality (BB/B). Our minimum rating for initial purchase is BB/B. Eleven external investment managers are responsible for high-yield security selection and portfolio construction. Our high-yield managers have a conservative approach to credit selection and very low historical default experience. Holdings are highly diversified across industries and generally subject to a 1.5 percent issuer limit as a percentage of high-yield allocation. We monitor position limits daily through an internal compliance system. Derivative and structured securities (e.g., credit default swaps and collateralized loan obligations) are not permitted in the high-yield portfolio.

Critical Accounting Estimates

As of March 31, 2019, there were no material changes to our critical accounting estimates. For a full discussion of our critical accounting estimates, refer to Item 7 in our 2018 Form 10-K.

Reinsurance recoverable on ceded reinsurance

	March 31, 2019				December 31, 2018
(in millions of U.S. dollars)	Net Reinsurance Recoverable (1)		Provision for Uncollectible		Net Reinsurance Recoverable (1)		Provision for Uncollectible
Reinsurance recoverable on unpaid losses and loss expenses	$	14,707	$	248	$	14,689	$	251
Reinsurance recoverable on paid losses and loss expenses	1,430		75		1,304		72
Reinsurance recoverable on losses and loss expenses	$	16,137	$	323	$	15,993	$	323
Reinsurance recoverable on policy benefits	$	203	$	4	$	202	$	4

⁽¹⁾  Net of provision for uncollectible reinsurance.

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The increase in reinsurance recoverable on losses and loss expenses was primarily due to additional reinsurance recoverables related to catastrophe losses in 2019 and prior period development, partially offset by collections on catastrophe losses and crop activity.

We evaluate the financial condition of our reinsurers and potential reinsurers on a regular basis and also monitor concentrations of credit risk with reinsurers. The provision for uncollectible reinsurance is required principally due to the potential failure of reinsurers to indemnify Chubb, primarily because of disputes under reinsurance contracts and insolvencies. We have established provisions for amounts estimated to be uncollectible on both unpaid and paid losses as well as future policy benefits.

Unpaid losses and loss expenses

As an insurance and reinsurance company, we are required by applicable laws and regulations and GAAP to establish loss and loss expense reserves for the estimated unpaid portion of the ultimate liability for losses and loss expenses under the terms of our policies and agreements with our insured and reinsured customers. With the exception of certain structured settlements, for which the timing and amount of future claim payments are reliably determinable, and certain reserves for unsettled claims that are discounted in statutory filings, our loss reserves are not discounted for the time value of money.

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

(in millions of U.S. dollars)	Gross Losses			Reinsurance Recoverable (1)			Net Losses
Balance at December 31, 2018	$	62,960		$	14,689		$	48,271
Losses and loss expenses incurred	5,261			1,163			4,098
Losses and loss expenses paid	(5,197		)	(1,178		)	(4,019		)
Foreign currency revaluation and other	119			33			86
Balance at March 31, 2019	$	63,143		$	14,707		$	48,436

⁽¹⁾  Net of provision for uncollectible reinsurance.

The estimate of the liabilities includes provisions for claims that have been reported but are unpaid at the balance sheet date (case reserves) and for obligations on claims that have been incurred but not reported (IBNR) at the balance sheet date. IBNR may also include provisions to account for the possibility that reported claims may settle for amounts that differ from the established case reserves. Loss reserves also include an estimate of expenses associated with processing and settling unpaid claims (loss expenses).

Refer to Note 4 to the Consolidated Financial Statements for a discussion on the changes in the loss reserves.

Asbestos and Environmental (A&E)

There was no significant A&E reserve activity during the three months ended March 31, 2019. A&E reserves are included in Corporate. Refer to our 2018 Form 10-K for further information on our A&E exposures.

Fair value measurements

Accounting guidance defines fair value as the price to sell an asset or transfer a liability (an exit price) in an orderly transaction between market participants and establishes a three-level valuation hierarchy based on the reliability of the inputs. The fair value hierarchy gives the highest priority to quoted prices in active markets (Level 1 inputs) and the lowest priority to unobservable data (Level 3 inputs). Level 2 includes inputs, other than quoted prices within Level 1, that are observable for assets or liabilities either directly or indirectly. Refer to Note 3 to the Consolidated Financial Statements for information on our fair value measurements.

Catastrophe management

We actively monitor and manage our catastrophe risk accumulation around the world such as setting risk limits based on probable maximum loss (PML) and purchasing catastrophe reinsurance. The table below presents our modeled pre-tax estimates of natural catastrophe PML, net of reinsurance, at March 31, 2019, for Worldwide, U.S. hurricane and California earthquake events, based on our in-force portfolio at January 1, 2019 and reflecting the April 1, 2019 reinsurance program (see Natural Catastrophe Property Reinsurance Program section) as well as inuring reinsurance protection coverages. According to the model, for the 1-in-100 return period scenario, there is a one percent chance that our annual aggregate losses incurred in

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any year from U.S. hurricane events could be in excess of $2,659 million (or 5.1 percent of our total shareholders’ equity at March 31, 2019).

	Modeled Net Probable Maximum Loss (PML)
	Worldwide (1)				U.S. Hurricane (2)				California Earthquake (3)
	Annual Aggregate				Annual Aggregate				Single Occurrence
(in millions of U.S. dollars, except for percentages)	Chubb		% of Total Shareholders’ Equity		Chubb		% of Total Shareholders’ Equity		Chubb		% of Total Shareholders’ Equity
1-in-10	$	1,848	3.5	%	$	1,065	2.0	%	$	127	0.2	%
1-in-100	$	3,787	7.2	%	$	2,659	5.1	%	$	1,339	2.6	%
1-in-250	$	6,145	11.7	%	$	4,779	9.1	%	$	1,519	2.9	%

⁽¹⁾  Worldwide losses are comprised of losses arising only from hurricanes, typhoons, convective storms and earthquakes and do not include “non-modeled” perils such as wildfire and flood.

⁽²⁾  U.S. Hurricane losses include losses from wind and storm-surge and exclude rainfall.

⁽³⁾  California earthquakes include fire-following perils.

The above estimates of Chubb’s loss profile are inherently uncertain for many reasons, including the following:

• While the use of third-party catastrophe modeling packages to simulate potential hurricane and earthquake losses is prevalent within the insurance industry, the models are reliant upon significant meteorology, seismology, and engineering assumptions to estimate catastrophe losses. In particular, modeled catastrophe events are not always a representation of actual events and ensuing additional loss potential;

• There is no universal standard in the preparation of insured data for use in the models, the running of the modeling software and interpretation of loss output. These loss estimates do not represent our potential maximum exposures and it is highly likely that our actual incurred losses would vary materially from the modeled estimates; and

• The potential effects of climate change add to modeling complexity.

Natural Catastrophe Property Reinsurance Program

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

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

Chubb renewed its Global Property Catastrophe Reinsurance Program for our North American and International operations effective April 1, 2019 through March 31, 2020, with modest enhancements in coverage from the expiring program. The program consists of three layers in excess of losses retained by Chubb on a per occurrence basis. In addition, Chubb also renewed its terrorism coverage (excluding nuclear, biological, chemical and radiation coverage, with an inclusion of coverage for biological and chemical coverage for personal lines) for the United States from April 1, 2019 through March 31, 2020 with the same limits and retention and percentage placed except that the majority of terrorism coverage is on an aggregate basis above our retentions without a reinstatement.

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Loss Location	Layer of Loss	Comments	Notes
United States (excluding Alaska and Hawaii)	$0 million – $1.0 billion	Losses retained by Chubb	(a)
United States (excluding Alaska and Hawaii)	$1.0 billion – $1.2 billion	All natural perils and terrorism	(b)
United States (excluding Alaska and Hawaii)	$1.2 billion – $2.2 billion	All natural perils and terrorism	(c)
United States (excluding Alaska and Hawaii)	$2.2 billion – $3.5 billion	All natural perils and terrorism	(d)
International (including Alaska and Hawaii)	$0 million – $175 million	Losses retained by Chubb	(a)
International (including Alaska and Hawaii)	$175 million – $1.175 billion	All natural perils and terrorism	(c)
Alaska, Hawaii, and Canada	$1.175 billion – $2.475 billion	All natural perils and terrorism	(d)

^(a)  Ultimate retention will depend upon the nature of the loss and the interplay between the underlying per risk programs and certain other catastrophe programs purchased by individual business units. These other catastrophe programs have the potential to reduce our effective retention below the stated levels.

^(b)  These coverages are partially placed with Reinsurers.

^(c)  These coverages are both part of the same Second layer within the Global Catastrophe Program and are fully placed with Reinsurers.

^(d)  These coverages are both part of the same Third layer within the Global Catastrophe Program and are fully placed with Reinsurers.

Chubb also has a property catastrophe bond in place that offers additional natural catastrophe protection for certain parts of the portfolio. The geographic scope of this coverage is from Virginia through Maine. The East Lane VI 2015 bond currently provides $250 million of coverage as part of a $427 million layer in excess of $2.0 billion retention through March 13, 2020.

Crop Insurance

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

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

Each year the RMA issues a final SRA for the subsequent reinsurance year (i.e., the 2019 SRA covers the 2019 reinsurance year from July 1, 2018 through June 30, 2019). There were no significant changes in the terms and conditions to the 2019 SRA and therefore, the new SRA does not impact Chubb's outlook on the crop program relative to 2019.

We recognize net premiums written as soon as estimable on our MPCI business, which is generally when we receive acreage reports from the policyholders on the various crops throughout the U.S. This allows us to best determine the premium associated with the liability that is being planted. The MPCI program has specific timeframes as to when producers must report

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acreage to us and in certain cases, the reporting occurs after the close of the respective reinsurance year. Once the net premium written has been recorded, the premium is then earned over the growing season for the crops. A majority of the crops that are covered in the program are typically subject to the SRA in effect at the beginning of the year. Given the major crops covered in the program, we typically see a substantial written and earned premium impact in the second and third quarters.

The pricing of MPCI premium is determined using a number of factors including commodity prices and related volatility (i.e., both impact the amount of premium we can charge to the policyholder). For example, in most states, the pricing for the MPCI Revenue Product for corn (i.e., insurance coverage for lower than expected crop revenue in a given season) includes a factor based on the average commodity price in February. If corn commodity prices are higher in February, compared to the February price in the prior year, and all other factors are the same, the increase in price will increase the corn premium year-over-year. Pricing is also impacted by volatility factors, which measure the likelihood commodity prices will fluctuate over the crop year. For example, if volatility is set at a higher rate compared to the prior year, and all other factors are the same, the premium charged to the policyholder will be higher year-over-year for the same level of coverage.

Losses incurred on the MPCI business are determined using both commodity price and crop yield. With respect to commodity price, there are two important periods on a large portion of the business: The month of February when the initial premium base is set, and the month of October when the final harvest price is set. If the price declines from February to October, with yield remaining at normal levels, the policyholder may be eligible to recover on the policy. However, in most cases there are deductibles on these policies, therefore, the impact of a decline in price would have to exceed the deductible before a policyholder would be eligible to recover.

We evaluate our MPCI business at an aggregate level and the combination of all of our insured crops (both winter and summer) go into our underwriting gain or loss estimate in any given year. Typically, we do not have enough information on the harvest prices or crop yield outputs to quantify the preliminary estimated impact to our underwriting results until the fourth quarter.

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

Liquidity

We anticipate that positive cash flows from operations (underwriting activities and investment income) should be sufficient to cover cash outflows under most loss scenarios for the near term. In addition to cash from operations, routine sales of investments, and financing arrangements, we have agreements with a third-party bank provider which implemented two international multi-currency notional cash pooling programs to enhance cash management efficiency during periods of short-term timing mismatches between expected inflows and outflows of cash by currency. The programs allow us to optimize investment income by avoiding portfolio disruption. Should the need arise, we generally have access to capital markets and an available $1.0 billion letter of credit/revolver facility. We have the ability to increase the capacity to $2.0 billion under certain conditions, but any such increase would not raise the sub-limit for revolving loans above $1.0 billion. At March 31, 2019, our LOC usage was $669 million. Our access to funds under an existing credit facility is dependent on the ability of the banks that are a party to the facility to meet their funding commitments. Our existing credit facility has a remaining term expiring in October 2022 and requires that we maintain certain financial covenants, all of which we met at March 31, 2019. Should our existing credit provider experience financial difficulty, we may be required to replace credit sources, possibly in a difficult market. If we cannot obtain adequate capital or sources of credit on favorable terms, on a timely basis, or at all, our business, operating results, and financial condition could be adversely affected. To date, we have not experienced difficulty accessing our credit facility. Refer to "Credit Facilities" in our 2018 10-K for additional information.

The payment of dividends or other statutorily permissible distributions from our operating companies are subject to the laws and regulations applicable to each jurisdiction, as well as the need to maintain capital levels adequate to support the insurance and reinsurance operations, including financial strength ratings issued by independent rating agencies. During the three months endedMarch 31, 2019, we were able to meet all of our obligations, including the payments of dividends on our Common Shares, with our net cash flows.

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We assess which subsidiaries to draw dividends from based on a number of factors. Considerations such as regulatory and legal restrictions as well as the subsidiary’s financial condition are paramount to the dividend decision. Chubb Limited received dividends of $200 million and nil from its Bermuda subsidiaries during the three months endedMarch 31, 2019 and 2018, respectively.

The payment of any dividends from CGM or its subsidiaries is subject to applicable U.K. insurance laws and regulations. In addition, the release of funds by Syndicate 2488 to subsidiaries of CGM is subject to regulations promulgated by the Society of Lloyd’s. The U.S. insurance subsidiaries of Chubb INA Holdings Inc. (Chubb INA) may pay dividends, without prior regulatory approval, subject to restrictions set out in state law of the subsidiary’s domicile (or, if applicable, commercial domicile). Chubb INA’s international subsidiaries are also subject to insurance laws and regulations particular to the countries in which the subsidiaries operate. These laws and regulations sometimes include restrictions that limit the amount of dividends payable without prior approval of regulatory insurance authorities. Chubb Limited received no dividends from CGM or Chubb INA during the three months endedMarch 31, 2019 and 2018. Debt issued by Chubb INA is serviced by statutorily permissible distributions by Chubb INA’s insurance subsidiaries to Chubb INA as well as other group resources. Chubb INA received dividends of nil and $3.0 billion from its subsidiaries during the three months endedMarch 31, 2019 and 2018, respectively.

Cash Flows

Our sources of liquidity include cash from operations, routine sales of investments, and financing arrangements. The following is a discussion of our cash flows for the three months endedMarch 31, 2019 and 2018.

Operating cash flows were $1.3 billion in the three months endedMarch 31, 2019, compared to $551 million in the prior year period. The prior year had higher net claims paid, principally reflecting the catastrophe loss payments related to the 2017 catastrophe events. In addition, there were lower taxes paid in 2019, reflecting the benefit of a refund claim for overpayments of taxes from prior years.

Cash used for investing was $673 million in the three months endedMarch 31, 2019, compared to $881 million in the prior year period. Cash used for financing was $630 million in the three months endedMarch 31, 2019, compared to cash from financing of $1.6 billion in the prior year period. The current year included $367 million of share repurchases and $336 million of dividends paid on Common Shares. The prior year included $1.9 billion of net proceeds from the issuance of long-term debt (net of repayments) partially offset by $330 million of dividends paid on Common Shares.

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

We use repurchase agreements as a funding alternative. At March 31, 2019, there were $1.4 billion in repurchase agreements outstanding with various maturities over the next 8 months.

Capital Resources

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

	March 31			December 31
(in millions of U.S. dollars, except for ratios)	2019			2018
Short-term debt	$	509		$	509
Long-term debt	12,071			12,087
Total financial debt	12,580			12,596
Trust preferred securities	308			308
Total shareholders’ equity	52,355			50,312
Total capitalization	$	65,243		$	63,216
Ratio of financial debt to total capitalization	19.3		%	19.9		%
Ratio of financial debt plus trust preferred securities to total capitalization	19.8		%	20.4		%

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Repurchase agreements are excluded from the table above and are disclosed separately from short-term debt in the Consolidated balance sheets. The repurchase agreements are collateralized borrowings where we maintain the right and ability to redeem the collateral on short notice, unlike short-term debt which comprises the current maturities of our long-term debt instruments.

For the three months endedMarch 31, 2019, we repurchased $367 million of Common Shares in a series of open market transactions under the Board of Directors (Board) share repurchase authorization. At March 31, 2019, there were 21,604,659 Common Shares in treasury with a weighted average cost of $128.46 per share. For the period April 1 through May 1, 2019, we repurchased 550,000 Common Shares for a total of $77 million in a series of open market transactions. At May 1, 2019, $1.0 billion in share repurchase authorization remained through December 31, 2019.

We generally maintain the ability to issue certain classes of debt and equity securities via an unlimited Securities and Exchange Commission (SEC) shelf registration which is renewed every three years. This allows us capital market access for refinancing as well as for unforeseen or opportunistic capital needs.

Dividends

We have paid dividends each quarter since we became a public company in 1993. Under Swiss law, dividends must be stated in Swiss francs though dividend payments are made by Chubb in U.S. dollars. Refer to Note 6 to the Consolidated Financial Statements for a discussion of our dividend methodology.

At our May 2018 annual general meeting, our shareholders approved an annual dividend for the following year of up to $2.92 per share, or CHF 2.92 per share, calculated using the USD/CHF exchange rate as published in the Wall Street Journal on May 17, 2018, which was paid in four quarterly installments of $0.73 per share after the general meeting by way of a distribution from capital contribution reserves, transferred to free reserves for payment. The Board determines the record and payment dates at which the annual dividend may be paid until the date of the 2019 annual general meeting, and is authorized to abstain from distributing a dividend at its discretion. The annual dividend approved in May 2018 represented an $0.08 per share increase ($0.02 per quarter) over the prior year dividend.

The following table represents dividends paid per Common Share to shareholders of record on each of the following dates:

Shareholders of record as of:	Dividends paid as of:
December 21, 2018	January 11, 2019	$0.73 (CHF 0.73)
March 22, 2019	April 12, 2019	$0.73 (CHF 0.72)

ITEM 3. Quantitative and Qualitative Disclosures about Market Risk

Refer to Item 7A included in our 2018 Form 10-K.

Foreign currency management

As a global company, Chubb entities transact business in multiple currencies. Our policy is to generally match assets, liabilities and required capital for each individual jurisdiction in local currency, which would include the use of derivatives. We do not hedge our net asset non-U.S. dollar capital positions. We occasionally engage in hedging activity for planned cross border transactions. For an estimated impact of foreign currency movement on our net assets denominated in non-U.S. currencies, refer to Item 7A in our 2018 Form 10-K. This information will be updated and disclosed in interim filings if our net assets in non-U.S. currencies change materially from the December 31, 2018 balances disclosed in the 2018 Form 10-K.

Reinsurance of GMDB and GLB guarantees

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

Net income is directly impacted by changes in benefit reserves calculated in connection with reinsurance of variable annuity guarantees. In addition, net income is directly impacted by changes in the fair value of the GLB liability (FVL), which is

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classified as a derivative for accounting purposes. The FVL established for a GLB reinsurance contract represents the difference between the fair value of the contract and the benefit reserves. Benefit reserves and FVL calculations are directly affected by market factors, including equity levels, interest rate levels, credit risk, and implied volatilities, as well as policyholder behaviors, such as annuitization and lapse rates, and policyholder mortality.

The tables below are estimates of the sensitivities to instantaneous changes in economic inputs (e.g., equity shock, interest rate shock etc.) or actuarial assumptions at March 31, 2019 of the FVL and of the fair value of specific derivative instruments held (hedge value) to partially offset the risk in the variable annuity guarantee reinsurance portfolio. The following assumptions should be considered when using the below tables:

• No changes to the benefit ratio used to establish benefit reserves at March 31, 2019.

• Equity shocks impact all global equity markets equally

• Our liabilities are sensitive to global equity markets in the following proportions: 75 percent—85 percent U.S. equity, and 15 percent—25 percent international equity.

• Our current hedge portfolio is sensitive only to U.S. equity markets.

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

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

• Our liabilities are also sensitive to global interest rates at various points on the yield curve, mainly the U.S. Treasury curve in the following proportions: up to 10 percent short-term rates (maturing in less than 5 years), 25 percent—35 percent medium-term rates (maturing between 5 years and 10 years, inclusive), and 55 percent—65 percent long-term rates (maturing beyond 10 years).

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

• The hedge sensitivity is from March 31, 2019 market levels and only applicable to the equity and interest rate sensitivities table below.

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

• In addition, the tables below do not reflect the expected quarterly run rate of net income generated by the variable annuity guarantee reinsurance portfolio if markets remain unchanged during the period. All else equal, if markets remain unchanged during the period, the Gross FVL will increase, resulting in a realized loss. The Gross FVL increases primarily because future premiums are lower by the amount collected in the quarter, and also because future claims are discounted for a shorter period. We refer to this increase in Gross FVL as “timing effect”. The unfavorable impact of timing effect on our Gross FVL in a quarter is not reflected in the sensitivity tables below. For this reason, when using the tables below to estimate the sensitivity of Gross FVL in the second quarter to various changes, it is necessary to assume an additional $5 million to $45 million increase in Gross FVL and realized losses. The impact to Net income is partially mitigated because this realized loss is partially offset by the positive quarterly run rate of Life insurance underwriting income generated by the variable annuity guarantee reinsurance portfolio if markets remain unchanged during the period. Note that both the timing effect and the quarterly run rate of Life insurance underwriting income change over time as the book ages.

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Sensitivities to equity and interest rate movements
(in millions of U.S. dollars)		Worldwide Equity Shock
Interest Rate Shock		+10%			Flat			-10%			-20%			-30%			-40%
+100 bps	(Increase)/decrease in Gross FVL	$	302		$	184		$	34		$	(140	)	$	(343	)	$	(571	)
	Increase/(decrease) in hedge value	(55		)	—			55			110			165			220
	Increase/(decrease) in net income	$	247		$	184		$	89		$	(30	)	$	(178	)	$	(351	)
Flat	(Increase)/decrease in Gross FVL	$	147		$	—		$	(171	)	$	(370	)	$	(597	)	$	(846	)
	Increase/(decrease) in hedge value	(55		)	—			55			110			165			220
	Increase/(decrease) in net income	$	92		$	—		$	(116	)	$	(260	)	$	(432	)	$	(626	)
-100 bps	(Increase)/decrease in Gross FVL	$	(59	)	$	(226	)	$	(419	)	$	(639	)	$	(884	)	$	(1,143	)
	Increase/(decrease) in hedge value	(55		)	—			55			110			165			220
	Increase/(decrease) in net income	$	(114	)	$	(226	)	$	(364	)	$	(529	)	$	(719	)	$	(923	)
Sensitivities to Other Economic Variables		AA-rated Credit Spreads						Interest Rate Volatility						Equity Volatility
(in millions of U.S. dollars)		+100 bps			-100 bps			+2%			-2%			+2%			-2%
(Increase)/decrease in Gross FVL		$	64		$	(71	)	$	—		$	—		$	(9	)	$	8
Increase/(decrease) in net income		$	64		$	(71	)	$	—		$	—		$	(9	)	$	8
Sensitivities to Actuarial Assumptions								Mortality
(in millions of U.S. dollars)								+20%			+10%			-10%			-20%
(Increase)/decrease in Gross FVL								$	17		$	9		$	(9	)	$	(18	)
Increase/(decrease) in net income								$	17		$	9		$	(9	)	$	(18	)
								Lapses
(in millions of U.S. dollars)								+50%			+25%			-25%			-50%
(Increase)/decrease in Gross FVL								$	84		$	44		$	(48	)	$	(101	)
Increase/(decrease) in net income								$	84		$	44		$	(48	)	$	(101	)
								Annuitization
(in millions of U.S. dollars)								+50%			+25%			-25%			-50%
(Increase)/decrease in Gross FVL								$	(467	)	$	(247	)	$	273		$	476
Increase/(decrease) in net income								$	(467	)	$	(247	)	$	273		$	476

ITEM 4. Controls and Procedures

Chubb’s management, with the participation of Chubb’s Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of Chubb’s disclosure controls and procedures as defined in Rule 13a-15(e) and Rule 15d-15(e) under the Securities Exchange Act of 1934 as of March 31, 2019. Based upon that evaluation, Chubb’s Chief Executive Officer and Chief Financial Officer concluded that Chubb’s disclosure controls and procedures are effective in allowing information required to be disclosed in reports filed under the Securities Exchange Act of 1934 to be recorded, processed, summarized, and reported within time periods specified in the rules and forms of the SEC, and that such information is accumulated and communicated to Chubb’s management, including its Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure.

On January 14, 2016, Chubb completed the acquisition of The Chubb Corporation. During the three months ended March 31, 2019, we continued to integrate the information technology environments of the two companies.

There were no other changes to Chubb's internal controls over financial reporting during the three months ended March 31, 2019 that have materially affected, or are reasonably likely to materially affect, Chubb's internal controls over financial reporting.

76

PART II OTHER INFORMATION

ITEM 1. Legal Proceedings

The information required with respect to this item is included in Note 5 g) to the Consolidated Financial Statements which is hereby incorporated by reference.

ITEM 1A. Risk Factors

Refer to "Risk Factors" under Item 1A of Part I of our 2018 Form 10-K. There have been no material changes to the risk factors disclosed in Item 1A of Part I of our 2018 Form 10-K.

ITEM 2. Unregistered Sales of Equity Securities and Use of Proceeds and Issuer Repurchases of Equity Securities

Issuer’s Repurchases of Equity Securities

The following table provides information with respect to purchases by Chubb of its Common Shares during the three months ended March 31, 2019:

Period	Total Number of Shares Purchased (1)	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plan (2)	Approximate Dollar Value of Shares that May Yet be Purchased Under the Plan (3)
January 1 through January 31	378,763	$	129.25	373,129	$	1.43	billion
February 1 through February 28	1,389,224	$	132.65	1,005,625	$	1.30	billion
March 1 through March 31	1,380,440	$	135.46	1,375,000	$	1.11	billion
Total	3,148,427	$	133.47	2,753,754

⁽¹⁾  This column represents open market share repurchases and the surrender to Chubb of Common Shares to satisfy tax withholding obligations in connection with the vesting of restricted stock issued to employees and the exercising of options by employees.

⁽²⁾  The aggregate value of shares repurchased in the three months ended March 31, 2019 as part of the publicly announced plan was $367 million.

⁽³⁾  Refer to Note 6 to the Consolidated Financial Statements for more information on the Chubb Limited securities repurchase authorization. In December 2018, our Board authorized the repurchase of up to $1.5 billion of Chubb's Common Shares from December 1, 2018 through December 31, 2019. For the period April 1, 2019 through May 1, 2019, we repurchased 550,000 Common Shares for a total of $77 million in a series of open market transactions. At May 1, 2019, $1.0 billion in share repurchase authorization remained through December 31, 2019.

77

ITEM 6. Exhibits

		Incorporated by Reference
Exhibit Number	Exhibit Description	Form	Original Number	Date Filed	Filed Herewith
3.1	Articles of Association of the Company, as amended	8-K	3.1	May 18, 2018
3.2	Organizational Regulations of the Company, as amended	8-K	3.1	November 21, 2016
4.1	Articles of Association of the Company, as amended	8-K	4.1	May 18, 2018
4.2	Organizational Regulations of the Company, as amended	8-K	3.1	November 21, 2016
10.1*	Outside Directors Compensation Parameters	10-K	10.12	February 28, 2019
31.1	Certification Pursuant to Section 302 of The Sarbanes-Oxley Act of 2002				X
31.2	Certification Pursuant to Section 302 of The Sarbanes-Oxley Act of 2002				X
32.1	Certification Pursuant to 18 U.S.C. Section 1350, As Adopted Pursuant to Section 906 of The Sarbanes-Oxley Act of 2002				X
32.2	Certification Pursuant to 18 U.S.C. Section 1350, As Adopted Pursuant to Section 906 of The Sarbanes-Oxley Act of 2002				X
101.1	The following financial information from Chubb Limited’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2019 formatted in XBRL: (i) Consolidated Balance Sheets at March 31, 2019, and December 31, 2018; (ii) Consolidated Statements of Operations and Comprehensive Income for the three months ended March 31, 2019 and 2018; (iii) Consolidated Statements of Shareholders’ Equity for the three months ended March 31, 2019 and 2018; (iv) Consolidated Statements of Cash Flows for the three months ended March 31, 2019 and 2018; and (v) Notes to Consolidated Financial Statements				X
* Management contract, compensatory plan or arrangement

78

SIGNATURES

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

	CHUBB LIMITED
	(Registrant)
May 2, 2019	/s/ Evan G. Greenberg
	Evan G. Greenberg
	Chairman, President and Chief Executive Officer
May 2, 2019	/s/ Philip V. Bancroft
	Philip V. Bancroft
	Executive Vice President and Chief Financial Officer

79

EX-31.1

Exhibit 31.1

CERTIFICATION PURSUANT TO

SECTION 302 OF

THE SARBANES-OXLEY ACT OF 2002

I, Evan G. Greenberg, certify that:

1) I have reviewed this quarterly report on Form 10-Q of Chubb Limited;

2) Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3) Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4) The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5) The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s Board of Directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 2, 2019

/s/ Evan G. Greenberg

Evan G. Greenberg

Chairman, President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION PURSUANT TO

SECTION 302 OF

THE SARBANES-OXLEY ACT OF 2002

I, Philip V. Bancroft, certify that:

1) I have reviewed this quarterly report on Form 10-Q of Chubb Limited;

2) Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3) Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4) The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5) The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s Board of Directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 2, 2019

/s/ Philip V. Bancroft

Philip V. Bancroft

Executive Vice President and Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned officer of Chubb Limited (the Corporation) hereby certifies that the Corporation’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2019, fully complies with the applicable reporting requirements of Section 13(a) of the Securities Exchange Act of 1934 (15 U.S.C. 78m(a)) and that the information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Corporation.

Dated: May 2, 2019	/s/ Evan G. Greenberg
	Evan G. Greenberg
	Chairman, President and Chief Executive Officer

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned officer of Chubb Limited (the Corporation) hereby certifies that the Corporation’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2019, fully complies with the applicable reporting requirements of Section 13(a) of the Securities Exchange Act of 1934 (15 U.S.C. 78m(a)) and that the information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Corporation.

Dated: May 2, 2019	/s/ Philip V. Bancroft
	Philip V. Bancroft
	Executive Vice President and Chief Financial Officer

XML

Document and Entity Information - SFr / shares	3 Months Ended
	Mar. 31, 2019	Apr. 18, 2019	Dec. 31, 2018
Entity Information [Line Items]
Common Shares, par value	SFr 24.15		SFr 24.15
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Trading Symbol	CB
Entity Registrant Name	Chubb Ltd
Entity Central Index Key	0000896159
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Common Shares Outstanding		457,870,731

XML

Consolidated Balance Sheets - USD ($) $ in Millions		Mar. 31, 2019		Dec. 31, 2018
Assets
Fixed maturities available for sale, at fair value (amortized cost – $79,624 and $79,323) (includes hybrid financial instruments of $8 and $9)		$ 80,663		$ 78,470
Fixed maturities held to maturity, at amortized cost (fair value – $13,240 and $13,259)		13,136		13,435
Equity securities, at fair value and cost		821		770
Short-term investments, at fair value and amortized cost		3,078		3,016
Other investments, at fair value and cost		5,562		5,277
Total investments		103,260		100,968
Cash		1,271	[1]	1,247	[2]
Restricted cash	[1]	122		93
Securities lending collateral		1,861		1,926
Accrued investment income		870		883
Insurance and reinsurance balances receivable		9,826		10,075
Reinsurance recoverable on losses and loss expenses		16,137		15,993
Reinsurance recoverable on policy benefits		203		202
Deferred policy acquisition costs		5,008		4,922
Value of business acquired		289		295
Goodwill		15,328		15,271
Other intangible assets		6,091		6,143
Prepaid reinsurance premiums		2,698		2,544
Investments in partially-owned insurance companies		708		678
Other assets		7,675		6,531
Total assets		171,347		167,771
Liabilities
Unpaid losses and loss expenses		63,143		62,960
Unearned premiums		15,909		15,532
Future policy benefits		5,552		5,506
Insurance and reinsurance balances payable		6,469		6,437
Securities lending payable		1,861		1,926
Accounts payable, accrued expenses, and other liabilities		11,210		10,472
Deferred tax liabilities		541		304
Repurchase agreements		1,419		1,418
Short-term debt		509		509
Long-term debt		12,071		12,087
Trust preferred securities		308		308
Total liabilities		118,992		117,459
Commitments and contingencies
Shareholders’ equity
Common Shares (CHF 24.15 par value; 479,783,864 shares issued; 458,179,205 and 459,203,378 shares outstanding)		11,121		11,121
Common Shares in treasury (21,604,659 and 20,580,486 shares)		(2,775)		(2,618)
Additional Paid in Capital, Common Stock		12,051		12,557
Retained earnings		32,728		31,700
Accumulated other comprehensive income (loss) (AOCI)		(770)		(2,448)
Total shareholders’ equity		52,355		50,312
Total liabilities and shareholders’ equity		$ 171,347		$ 167,771

[1] Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Various Chubb entities participate in one or the other of the Pools, pursuant to which credit and debit balances in individual Chubb accounts are translated daily into a single currency and pooled on a notional basis. Individual Chubb entities are permitted to overdraw on their individual accounts provided the overall Pool balances do not fall below zero. At March 31, 2019, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[2] Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Various Chubb entities participate in one or the other of the Pools, pursuant to which credit and debit balances in individual Chubb accounts are translated daily into a single currency and pooled on a notional basis. Individual Chubb entities are permitted to overdraw on their individual accounts provided the overall Pool balances do not fall below zero. At December 31, 2018, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

XML

Consolidated Balance Sheets (Parenthetical) $ in Millions	Mar. 31, 2019 USD ($) shares	Dec. 31, 2018 USD ($) shares
Statement of Financial Position [Abstract]
Available for sale, at amortized cost	$ 79,624	$ 79,323
Fixed maturities available for sale, hybrid financial instruments	8	9
Held to maturity, at Fair Value	13,240	13,259
Equity securities, at cost	0
Other investments, cost	$ 0
Common Shares, shares issued | shares	479,783,864	479,783,864
Common Shares, shares outstanding | shares	458,179,205	459,203,378
Common Shares in treasury, shares | shares	21,604,659	20,580,486

XML

Consolidated Statements Of Operations and Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues
Net premiums written	$ 7,313	$ 7,104
Increase in unearned premiums	(176)	(77)
Net premiums earned	7,137	7,027
Net investment income	836	806
Net realized gains (losses):
Other-than-temporary impairment (OTTI) losses gross	(13)	(1)
Portion of OTTI losses recognized in other comprehensive income (OCI)	0	0
Net OTTI losses recognized in income	(13)	(1)
Net realized gains (losses) excluding OTTI losses	(84)	(1)
Net Realized Gains Losses	(97)	(2)
Total revenues	7,876	7,831
Expenses
Losses and loss expenses	4,098	4,102
Policy benefits	196	151
Policy acquisition costs	1,464	1,464
Administrative expenses	710	692
Interest expense	140	157
Other (income) expense	(39)	(47)
Amortization of purchased intangibles	76	85
Chubb integration expenses	3	10
Total expenses	6,648	6,614
Income before income tax	1,228	1,217
Income tax expense (benefit) (includes $(6) and $(3) on reclassified unrealized losses)	188	135
Net income	1,040	1,082
Other comprehensive income (loss)
Unrealized appreciation (depreciation)	1,845	(1,234)
Reclassification adjustment for net realized (gains) losses included in net income	44	23
Unrealized appreciation (Depreciation) after reclassification adjustment	1,889	(1,211)
Change in:
Cumulative foreign currency translation adjustment	147	397
Postretirement benefit liability adjustment	(27)	(23)
Other comprehensive income (loss), before income tax	2,009	(837)
Income tax (expense) benefit related to OCI items	(331)	208
Other comprehensive income (loss)	1,678	(629)
Comprehensive income	$ 2,718	$ 453
Earnings per share
Basic earnings per share	$ 2.27	$ 2.32
Diluted earnings per share	$ 2.25	$ 2.30

XML

Consolidated Statements of Operations and Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Total net realized gains (losses) reclassified from AOCI	$ (44)	$ (23)
Income tax expense on reclassified unrealized gains and loses	$ (6)	$ (3)

XML

Consolidated Statements Of Shareholders' Equity - USD ($) $ in Millions	Total	Common Stock [Member]	Common shares in treasury [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]	Cumulative Foreign Currency Translation Adjustment [Member]	Postretirement Benefit Liability Adjustment [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Cumulative effect of adoption of accounting guidance					$ 409	$ (416)
Balance - beginning of period at Dec. 31, 2017		$ 11,121	$ (1,944)	$ 13,978	27,883	1,034	$ (1,187)	$ 280
Balance - beginning of period (Previous Accounting Guidance [Member]) at Dec. 31, 2017					27,474	1,450
Common Shares repurchased			0
Net shares redeemed under employee share-based compensation plans			217	(262)
Exercise of stock options				(16)
Share-based compensation expense				62
Adjustments to Additional Paid in Capital, Dividends in Excess of Retained Earnings				(332)
Net income (loss)	$ 1,082				1,082
Funding of dividends declared from Additional paid-in capital					332
Dividends declared on Common Shares					(332)
Change in period, before reclassification from AOCI, net of income tax benefit (expense) of $(324) and $226						(1,008)
Amounts reclassified from AOCI, net of income tax expense of $(6) and $(3)						20
Change in period, net of income tax benefit (expense) of $(330) and $223						(988)
Change in period, net of income tax expense of $(7) and $(19)							378
Change in period, net of income tax benefit of $6 and $4								(19)
Balance - end of period at Mar. 31, 2018	51,287	11,121	(1,727)	13,430	28,965	46	(809)	261	$ (502)
Cumulative effect of adoption of accounting guidance						0
Cumulative effect of adoption of accounting guidance | Accounting Standards Update 2017-08 [Member]					(12)
Balance - beginning of period at Dec. 31, 2018	50,312	11,121	(2,618)	12,557	31,688	(545)	(1,976)	73
Balance - beginning of period (Previous Accounting Guidance [Member]) at Dec. 31, 2018					31,700	(545)
Common Shares repurchased			(367)
Net shares redeemed under employee share-based compensation plans			210	(191)
Exercise of stock options				(34)
Share-based compensation expense				54
Adjustments to Additional Paid in Capital, Dividends in Excess of Retained Earnings				(335)
Net income (loss)	1,040				1,040
Funding of dividends declared from Additional paid-in capital					335
Dividends declared on Common Shares					(335)
Change in period, before reclassification from AOCI, net of income tax benefit (expense) of $(324) and $226						1,521
Amounts reclassified from AOCI, net of income tax expense of $(6) and $(3)						38
Change in period, net of income tax benefit (expense) of $(330) and $223						1,559
Change in period, net of income tax expense of $(7) and $(19)							140
Change in period, net of income tax benefit of $6 and $4								(21)
Balance - end of period at Mar. 31, 2019	$ 52,355	$ 11,121	$ (2,775)	$ 12,051	$ 32,728	$ 1,014	$ (1,836)	$ 52	$ (770)

XML

Consolidated Statements Of Shareholders' Equity (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Stockholders' Equity [Abstract]
Other Comprehensive Income (Loss), Available-for-sale Securities, before Reclassification Adjustments, Tax	$ (324)	$ 226
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	(6)	(3)
Net unrealized appreciation on investments, Change in period, income tax (expense) benefit	(330)	223
Cumulative translation adjustment, Change in period, income tax(expense) benefit	(7)	(19)
Pension liability adjustment, Change in period, income tax (expense) benefit	$ 6	$ 4

XML

Consolidated Statements Of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities
Net income	$ 1,040	$ 1,082
Adjustments to reconcile net income to net cash flows from operating activities
Net Realized Gains Losses	97	2
Amortization of premiums/discounts on fixed maturities	118	155
Amortization of purchased intangibles	76	85
Deferred income taxes	(76)	(2)
Unpaid losses and loss expenses	62	(420)
Unearned premiums	274	111
Future policy benefits	41	58
Insurance and reinsurance balances payable	13	250
Accounts payable, accrued expenses, and other liabilities	(502)	(724)
Income taxes payable	266	88
Insurance and reinsurance balances receivable	278	(174)
Increase (Decrease) in Reinsurance Recoverable	(97)	141
Deferred policy acquisition costs	(63)	(75)
Other	(205)	(26)
Net cash flows from operating activities	1,322	551
Cash flows from investing activities
Purchases of fixed maturities available for sale	(5,561)	(5,972)
Purchases of fixed maturities held to maturity	(1)	(162)
Purchases of equity securities	(49)	(55)
Sales of fixed maturities available for sale	3,287	2,562
Proceeds From Sales To Be Announced Mortgage Backed Securities	6	0
Sales of equity securities	60	40
Maturities and redemptions of fixed maturities available for sale	1,831	1,865
Maturities and redemptions of fixed maturities held to maturity	280	255
Net change in short-term investments	(39)	731
Net derivative instruments settlements	(358)	39
Private equity contribution	(410)	(353)
Private equity distribution	368	201
Other	(87)	(32)
Net cash flows used for investing activities	(673)	(881)
Cash flows from financing activities
Dividends paid on Common Shares	(336)	(330)
Common Shares repurchased	(367)	(29)
Proceeds from Issuance of Long-term Debt	0	2,175
Proceeds from issuance of long-term debt	0	(300)
Proceeds from issuance of repurchase agreements	471	408
Repayment of repurchase agreements	(470)	(404)
Proceeds from share-based compensation plans	35	34
Policyholder contract deposits	115	118
Policyholder contract withdrawals	(78)	(105)
Net cash flows (used for) from financing activities	(630)	1,567
Effect of foreign currency rate changes on cash and restricted cash	34	25
Net Increase (Decrease) in cash and restricted cash	53	1,262
Cash and Restricted Cash - Beginning of year	1,340	851
Cash and Restricted Cash - end of Year	1,393	2,113
Supplemental cash flow information
Taxes paid	14	93
Interest paid	$ 85	$ 82

XML

General

3 Months Ended

Mar. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

General

General

a) Basis of presentation

Chubb Limited is a holding company incorporated in Zurich, Switzerland. Chubb Limited, through its subsidiaries, provides a broad range of insurance and reinsurance products to insureds worldwide. Chubb operates through the following business segments: North America Commercial P&C Insurance, North America Personal P&C Insurance, North America Agricultural Insurance, Overseas General Insurance, Global Reinsurance, and Life Insurance. Refer to Note 9 for additional information.

The interim unaudited consolidated financial statements, which include the accounts of Chubb Limited and its subsidiaries (collectively, Chubb, we, us, or our), have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) and, in the opinion of management, reflect all adjustments (consisting of normally recurring accruals) necessary for a fair statement of the results and financial position for such periods. All significant intercompany accounts and transactions, including internal reinsurance transactions, have been eliminated.

The results of operations and cash flows for any interim period are not necessarily indicative of the results for the full year. These consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes included in our 2018 Form 10-K.

b) Restricted cash

Restricted cash in the Consolidated balance sheets represents amounts held for the benefit of third parties and is legally or contractually restricted as to withdrawal or usage. Amounts include deposits with U.S. and non-U.S. regulatory authorities, trust funds set up for the benefit of ceding companies, and amounts pledged as collateral to meet financing arrangements.

The following table provides a reconciliation of cash and restricted cash reported within the Consolidated balance sheets that total to the amounts shown in the Consolidated statements of cash flows:

	March 31		December 31
(in millions of U.S. dollars)	2019		2018
Cash	$	1,271	$	1,247
Restricted cash	122		93
Total cash and restricted cash shown in the Consolidated statements of cash flows	$	1,393	$	1,340

c) Goodwill

During the three months endedMarch 31, 2019, Goodwill increased $57 million, primarily reflecting the impact of foreign exchange.

d) Accounting guidance adopted in 2019

Premium Amortization on Purchased Callable Debt Securities

Effective January 1, 2019, we adopted new accounting guidance on "Premium Amortization on Purchased Callable Debt Securities" for bonds held at a premium on a modified retrospective basis. The guidance requires the premium to be amortized to the earliest call date. As a result, we recorded a cumulative effect adjustment to decrease beginning retained earnings by $12 million after-tax ($15 million pre-tax). Securities held at a discount did not require an accounting change.

Lease Accounting

Effective for the quarter ended March 31, 2019, we adopted new lease accounting guidance and elected to utilize a modified retrospective approach which allowed us to initially apply the new lease standard at the adoption date and recognize a cumulative effect adjustment to the opening balance of retained earnings for 2019, with no adjustment to prior periods presented. The cumulative effect adjustment to the opening balance of retained earnings was zero. Our leases consist principally of real estate operating leases that are amortized on a straight-line basis over the term of the lease. The adoption of the updated guidance resulted in our recognizing a right-of-use asset of $608 million, which was recorded within Other assets, and a lease liability of $653 million, which was recorded within Accounts payable, accrued expenses, and other liabilities on the Consolidated balance sheet as well as de-recognizing the liability for deferred rent that was required under the previous guidance. The adoption of the new guidance did not have a material effect on our results of operations, financial condition or liquidity.

Refer to the2018 Form 10-K for information on accounting guidance not yet adopted.

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Investments

3 Months Ended

Mar. 31, 2019

Investments, Debt and Equity Securities [Abstract]

Investments

Investments

a) Fixed maturities

March 31, 2019	Amortized Cost		Gross Unrealized Appreciation		Gross Unrealized Depreciation			Fair Value		OTTI Recognized in AOCI
(in millions of U.S. dollars)
Available for sale
U.S. Treasury and agency	$	3,760	$	50	$	(19	)	$	3,791	$	—
Foreign	21,796		658		(112		)	22,342		—
Corporate securities	27,519		476		(170		)	27,825		(5		)
Mortgage-backed securities	16,369		173		(112		)	16,430		(1		)
States, municipalities, and political subdivisions	10,180		123		(28		)	10,275		—
	$	79,624	$	1,480	$	(441	)	$	80,663	$	(6	)
Held to maturity
U.S. Treasury and agency	$	1,144	$	11	$	(3	)	$	1,152	$	—
Foreign	1,503		34		(3		)	1,534		—
Corporate securities	2,543		30		(34		)	2,539		—
Mortgage-backed securities	2,484		16		(6		)	2,494		—
States, municipalities, and political subdivisions	5,462		67		(8		)	5,521		—
	$	13,136	$	158	$	(54	)	$	13,240	$	—

December 31, 2018	Amortized Cost		Gross Unrealized Appreciation		Gross Unrealized Depreciation			Fair Value		OTTI Recognized in AOCI
(in millions of U.S. dollars)
Available for sale
U.S. Treasury and agency	$	4,158	$	30	$	(43	)	$	4,145	$	—
Foreign	21,370		395		(349		)	21,416		—
Corporate securities	27,183		150		(750		)	26,583		(6		)
Mortgage-backed securities	15,758		66		(284		)	15,540		(1		)
States, municipalities, and political subdivisions	10,854		49		(117		)	10,786		—
	$	79,323	$	690	$	(1,543	)	$	78,470	$	(7	)
Held to maturity
U.S. Treasury and agency	$	1,185	$	8	$	(11	)	$	1,182	$	—
Foreign	1,549		11		(18		)	1,542		—
Corporate securities	2,601		11		(104		)	2,508		—
Mortgage-backed securities	2,524		5		(43		)	2,486		—
States, municipalities, and political subdivisions	5,576		16		(51		)	5,541		—
	$	13,435	$	51	$	(227	)	$	13,259	$	—

As discussed in Note 2b), if a credit loss is incurred on an impaired fixed maturity, an OTTI is considered to have occurred and the portion of the impairment not related to credit losses (non-credit OTTI) is recognized in OCI. Included in the “OTTI Recognized in AOCI” columns above are the cumulative amounts of non-credit OTTI recognized in OCI adjusted for subsequent sales, maturities, and redemptions. OTTI recognized in AOCI does not include the impact of subsequent changes in fair value of the related securities. In periods subsequent to a recognition of OTTI in OCI, changes in the fair value of the related fixed maturities are reflected in Net unrealized appreciation on investments in the Consolidated statements of shareholders’ equity. For the three months endedMarch 31, 2019 and 2018, $9 million of net unrealized appreciation and $4 million of net unrealized depreciation, respectively, related to such securities are included in OCI. At March 31, 2019 and December 31, 2018, AOCI included cumulative net unrealized appreciation of $3 million and $1 million, respectively, related to securities remaining in the investment portfolio for which a non-credit OTTI was recognized.

Mortgage-backed securities (MBS) issued by U.S. government agencies are combined with all other to be announced mortgage-backed securities (TBAs) held (refer to Note 5 b) (iv)) and are included in the category, “Mortgage-backed securities”. Approximately 82 percent and81 percent of the total mortgage-backed securities at March 31, 2019 and December 31, 2018, respectively, are represented by investments in U.S. government agency bonds. The remainder of the mortgage exposure consists of collateralized mortgage obligations and non-government mortgage-backed securities, the majority of which provide a planned structure for principal and interest payments and carry a rating of AAA by the major credit rating agencies.

The following table presents fixed maturities by contractual maturity:

			March 31				December 31
			2019				2018
(in millions of U.S. dollars)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Available for sale
Due in 1 year or less	$	3,776	$	3,785	$	3,569	$	3,568
Due after 1 year through 5 years	27,308		27,593		27,134		27,005
Due after 5 years through 10 years	23,367		23,690		24,095		23,543
Due after 10 years	8,804		9,165		8,767		8,814
	63,255		64,233		63,565		62,930
Mortgage-backed securities	16,369		16,430		15,758		15,540
	$	79,624	$	80,663	$	79,323	$	78,470
Held to maturity
Due in 1 year or less	$	614	$	616	$	536	$	537
Due after 1 year through 5 years	3,111		3,125		3,122		3,106
Due after 5 years through 10 years	4,246		4,287		4,468		4,407
Due after 10 years	2,681		2,718		2,785		2,723
	10,652		10,746		10,911		10,773
Mortgage-backed securities	2,484		2,494		2,524		2,486
	$	13,136	$	13,240	$	13,435	$	13,259

Expected maturities could differ from contractual maturities because borrowers may have the right to call or prepay obligations, with or without call or prepayment penalties. 

b) Net realized gains (losses)

In accordance with guidance related to the recognition and presentation of OTTI, when an impairment related to a fixed maturity has occurred, OTTI is required to be recorded in Net income if management has the intent to sell the security or it is more likely than not that we will be required to sell the security before the recovery of its amortized cost. Further, in cases where we do not intend to sell the security and it is more likely than not that we will not be required to sell the security, we must evaluate the security to determine the portion of the impairment, if any, related to credit losses. If a credit loss is incurred, an OTTI is considered to have occurred and any portion of the OTTI related to credit losses must be reflected in Net income while the portion of OTTI related to all other factors is recognized in OCI. For fixed maturities held to maturity, OTTI recognized in OCI is accreted from AOCI to the amortized cost of the fixed maturity prospectively over the remaining term of the securities.

Each quarter, securities in an unrealized loss position (impaired securities), including fixed maturities and securities lending collateral are reviewed to identify impaired securities to be specifically evaluated for a potential OTTI.

Evaluation of potential credit losses related to fixed maturities

We review each fixed maturity in an unrealized loss position to assess whether the security is a candidate for credit loss. Specifically, we consider credit rating, market price, and issuer-specific financial information, among other factors, to assess the likelihood of collection of all principal and interest as contractually due. Securities, for which we determine that credit loss is likely, are subjected to further analysis to estimate the credit loss recognized in Net income, if any. In general, credit loss recognized in Net income equals the difference between the security’s amortized cost and the net present value of its projected future cash flows discounted at the effective interest rate implicit in the debt security. All significant assumptions used in determining credit losses are subject to change as market conditions evolve.

Corporate securities

Projected cash flows for corporate securities (principally senior unsecured bonds) are driven primarily by assumptions regarding probability of default and also the timing and amount of recoveries associated with defaults. Chubb developed projected cash flows for corporate securities using market observable data, issuer-specific information, and credit ratings. We use historical default data by Moody’s Investors Service (Moody’s) rating category to calculate a 1-in-100 year probability of default, which results in a default assumption in excess of the historical mean default rate. Consistent with management's approach, Chubb assumed a 32 percent recovery rate (the par value of a defaulted security that will be recovered) across all rating categories rather than using Moody's historical mean recovery rate of 42 percent. We believe that use of a default assumption in excess of the historical mean is conservative.

For the three months endedMarch 31, 2019 and 2018, credit losses recognized in Net income for corporate securities were $6 million and nil, respectively.

Mortgage-backed securities

For mortgage-backed securities, credit impairment is assessed using a cash flow model that estimates the cash flows on the underlying mortgages, using the security-specific collateral and transaction structure. The model estimates cash flows from the underlying mortgage loans and distributes those cash flows to various tranches of securities, considering the transaction structure and any subordination and credit enhancements that exist in that structure. The cash flow model incorporates actual cash flows on the mortgage-backed securities through the current period and then projects the remaining cash flows using a number of assumptions, including default rates, prepayment rates, and loss severity rates (the par value of a defaulted security that will not be recovered) on foreclosed properties.

For the three months endedMarch 31, 2019 and 2018, there were no credit losses recognized in Net income for mortgage-backed securities.

The following table presents the components of Net realized gains (losses):

	Three Months Ended
	March 31
(in millions of U.S. dollars)	2019			2018
Fixed maturities:
OTTI on fixed maturities, gross and net	$	(13	)	$	(1	)
Gross realized gains excluding OTTI	27			66
Gross realized losses excluding OTTI	(58		)	(88		)
Total fixed maturities	(44		)	(23		)
Equity securities:
Gross realized gains excluding OTTI	64			10
Gross realized losses excluding OTTI	(6		)	(21		)
Total equity securities	58			(11		)
Other investments	(44		)	29
Foreign exchange gains (losses)	13			(77		)
Investment and embedded derivative instruments	(130		)	17
Fair value adjustments on insurance derivative	114			38
S&P futures	(63		)	22
Other derivative instruments	(1		)	2
Other	—			1
Net realized gains (losses) (pre-tax)	$	(97	)	$	(2	)

The following table presents a roll-forward of pre-tax credit losses related to fixed maturities for which a portion of OTTI was recognized in OCI:

	Three Months Ended
	March 31
(in millions of U.S. dollars)	2019			2018
Balance of credit losses related to securities still held – beginning of period	$	34		$	22
Additions where no OTTI was previously recorded	6			—
Reductions for securities sold during the period	(8		)	(7		)
Balance of credit losses related to securities still held – end of period	$	32		$	15

c) Equity securities and Other investments

The following table presents realized gains and losses from equity securities and other investments, including both sales of securities and unrealized gains and losses from changes in fair value:

									Three Months Ended
									March 31
	2019								2018
(in millions of U.S. dollars)	Equity Securities		Other Investments			Total			Equity Securities			Other Investments		Total
Net gains (losses) recognized during the period	$	58	$	(44	)	$	14		$	(11	)	$	29	$	18
Less: Net gains (losses) recognized from sales of securities	1		(2		)	(1		)	10			—		10
Unrealized gains (losses) recognized for securities still held at reporting date	$	57	$	(42	)	$	15		$	(21	)	$	29	$	8

d) Gross unrealized loss

At March 31, 2019, there were 10,095 fixed maturities out of a total of 30,335 fixed maturities in an unrealized loss position. The largest single unrealized loss in the fixed maturities was $6 million. Fixed maturities in an unrealized loss position at March 31, 2019, comprised both investment grade and below investment grade securities for which fair value declined primarily due to widening credit spreads since the date of purchase.

The following tables present, for all securities in an unrealized loss position (including securities on loan), the aggregate fair value and gross unrealized loss by length of time the security has continuously been in an unrealized loss position:

	0 – 12 Months					Over 12 Months					Total
March 31, 2019	Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss
(in millions of U.S. dollars)
U.S. Treasury and agency	$	68	$	—		$	2,298	$	(22	)	$	2,366	$	(22	)
Foreign	1,346		(26		)	4,228		(89		)	5,574		(115		)
Corporate securities	3,649		(62		)	6,206		(142		)	9,855		(204		)
Mortgage-backed securities	388		(1		)	8,974		(117		)	9,362		(118		)
States, municipalities, and political subdivisions	93		—			4,867		(36		)	4,960		(36		)
Total fixed maturities	$	5,544	$	(89	)	$	26,573	$	(406	)	$	32,117	$	(495	)

	0 – 12 Months					Over 12 Months					Total
December 31, 2018	Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss
(in millions of U.S. dollars)
U.S. Treasury and agency	$	523	$	(4	)	$	2,859	$	(50	)	$	3,382	$	(54	)
Foreign	6,764		(208		)	5,349		(159		)	12,113		(367		)
Corporate securities	16,538		(599		)	4,873		(255		)	21,411		(854		)
Mortgage-backed securities	6,103		(98		)	6,913		(229		)	13,016		(327		)
States, municipalities, and political subdivisions	5,024		(44		)	7,768		(124		)	12,792		(168		)
Total fixed maturities	$	34,952	$	(953	)	$	27,762	$	(817	)	$	62,714	$	(1,770	)

e) Restricted assets

Chubb is required to maintain assets on deposit with various regulatory authorities to support its insurance and reinsurance operations. These requirements are generally promulgated in the statutory regulations of the individual jurisdictions. The assets on deposit are available to settle insurance and reinsurance liabilities. Chubb is also required to restrict assets pledged under repurchase agreements, which represent Chubb's agreement to sell securities and repurchase them at a future date for a predetermined price. We use trust funds in certain large reinsurance transactions where the trust funds are set up for the benefit of the ceding companies and generally take the place of letter of credit (LOC) requirements. We have investments in segregated portfolios primarily to provide collateral or guarantees for LOC and derivative transactions. Included in restricted assets at March 31, 2019 and December 31, 2018 are investments, primarily fixed maturities, totaling $22.0 billion and $21.0 billion, respectively, and cash of $122 million and $93 million, respectively.

The following table presents the components of restricted assets:

	March 31		December 31
(in millions of U.S. dollars)	2019		2018
Trust funds	$	13,943	$	13,988
Deposits with U.S. regulatory authorities	2,904		2,405
Deposits with non-U.S. regulatory authorities	2,851		2,531
Assets pledged under repurchase agreements	1,478		1,468
Other pledged assets	942		692
Total	$	22,118	$	21,084

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Fair value measurements

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Fair value measurements

Fair value measurements

a) Fair value hierarchy

Fair value of financial assets and financial liabilities is estimated based on the framework established in the fair value accounting guidance. The guidance defines fair value as the price to sell an asset or transfer a liability (an exit price) in an orderly transaction between market participants and establishes a three-level valuation hierarchy based on the reliability of the inputs. The fair value hierarchy gives the highest priority to quoted prices in active markets and the lowest priority to unobservable data.

The three levels of the hierarchy are as follows:

• Level 1 – Unadjusted quoted prices for identical assets or liabilities in active markets;

• Level 2 – Includes, among other items, inputs other than quoted prices that are observable for the asset or liability such as

interest rates and yield curves, quoted prices for similar assets and liabilities in active markets, and quoted prices for identical or similar assets and liabilities in markets that are not active; and

• Level 3 – Inputs that are unobservable and reflect management’s judgments about assumptions that market participants

would use in pricing an asset or liability.

We categorize financial instruments within the valuation hierarchy at the balance sheet date based upon the lowest level of inputs that are significant to the fair value measurement.

We use pricing services to obtain fair value measurements for the majority of our investment securities. Based on management’s understanding of the methodologies used, these pricing services only produce an estimate of fair value if there is observable market information that would allow them to make a fair value estimate. Based on our understanding of the market inputs used by the pricing services, all applicable investments have been valued in accordance with GAAP. We do not adjust prices obtained from pricing services. The following is a description of the valuation techniques and inputs used to determine fair values for financial instruments carried at fair value, as well as the general classification of such financial instruments pursuant to the valuation hierarchy.

Fixed maturities

We use pricing services to estimate fair value measurements for the majority of our fixed maturities. The pricing services use market quotations for fixed maturities that have quoted prices in active markets; such securities are classified within Level 1. For fixed maturities other than U.S. Treasury securities that generally do not trade on a daily basis, the pricing services prepare estimates of fair value measurements using their pricing applications, which include available relevant market information, benchmark curves, benchmarking of like securities, sector groupings, and matrix pricing. Additional valuation factors that can be taken into account are nominal spreads, dollar basis, and liquidity adjustments. The pricing services evaluate each asset class based on relevant market and credit information, perceived market movements, and sector news. The market inputs used in the pricing evaluation, listed in the approximate order of priority include: benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, reference data, and industry and economic events. The extent of the use of each input is dependent on the asset class and the market conditions. Given the asset class, the priority of the use of inputs may change, or some market inputs may not be relevant. Additionally, fixed maturities valuation is more subjective when markets are less liquid due to the lack of market based inputs (i.e., stale pricing), which may increase the potential that an investment's estimated fair value is not reflective of the price at which an actual transaction would occur. The overwhelming majority of fixed maturities are classified within Level 2 because the most significant inputs used in the pricing techniques are observable. For a small number of fixed maturities, we obtain a single broker quote (typically from a market maker). Due to the disclaimers on the quotes that indicate that the price is indicative only, we include these fair value estimates in Level 3. 

Equity securities

Equity securities with active markets are classified within Level 1 as fair values are based on quoted market prices. For equity securities in markets which are less active, fair values are based on market valuations and are classified within Level 2. Equity securities for which pricing is unobservable are classified within Level 3.

Short-term investments

Short-term investments, which comprise securities due to mature within one year of the date of purchase that are traded in active markets, are classified within Level 1 as fair values are based on quoted market prices. Securities such as commercial paper and discount notes are classified within Level 2 because these securities are typically not actively traded due to their approaching maturity and, as such, their cost approximates fair value. Short-term investments for which pricing is unobservable are classified within Level 3.

Other investments

Fair values for the majority of Other investments including investments in partially-owned investment companies, investment funds, and limited partnerships are based on their respective net asset values or equivalent (NAV) and are excluded from the fair value hierarchy table below. Certain of our long-duration contracts are supported by assets that do not qualify for separate account reporting under GAAP. These assets comprise mutual funds classified within Level 1 in the valuation hierarchy on the same basis as other equity securities traded in active markets. Other investments also include equity securities classified within Level 1, and fixed maturities, classified within Level 2, held in rabbi trusts maintained by Chubb for deferred compensation plans and supplemental retirement plans and are classified within the valuation hierarchy on the same basis as other equity securities and fixed maturities. Other investments for which pricing is unobservable are classified within Level 3.

Securities lending collateral

The underlying assets included in Securities lending collateral in the Consolidated balance sheets are fixed maturities which are classified in the valuation hierarchy on the same basis as other fixed maturities. Excluded from the valuation hierarchy is the corresponding liability related to Chubb’s obligation to return the collateral plus interest as it is reported at contract value and not fair value in the Consolidated balance sheets.

Investment derivative instruments

Actively traded investment derivative instruments, including futures, options, and forward contracts are classified within Level 1 as fair values are based on quoted market prices. The fair value of cross-currency swaps and interest rate swaps is based on market valuations and is classified within Level 2. Investment derivative instruments are recorded in either Other assets or Accounts payable, accrued expenses, and other liabilities in the Consolidated balance sheets.

Other derivative instruments

We maintain positions in exchange-traded equity futures contracts designed to limit exposure to a severe equity market decline, which would cause an increase in expected claims and, therefore, an increase in reserves for our guaranteed minimum death benefits (GMDB) and guaranteed living benefits (GLB) reinsurance business. Our positions in exchange-traded equity futures contracts are classified within Level 1. The fair value of the majority of the remaining positions in other derivative instruments is based on significant observable inputs including equity security and interest rate indices. Accordingly, these are classified within Level 2. Other derivative instruments based on unobservable inputs are classified within Level 3. Other derivative instruments are recorded in either Other assets or Accounts payable, accrued expenses, and other liabilities in the Consolidated balance sheets.

Separate account assets

Separate account assets represent segregated funds where investment risks are borne by the customers, except to the extent of certain guarantees made by Chubb. Separate account assets comprise mutual funds classified within Level 1 in the valuation hierarchy on the same basis as other equity securities traded in active markets. Separate account assets also include fixed maturities classified within Level 2 because the most significant inputs used in the pricing techniques are observable. Excluded from the valuation hierarchy are the corresponding liabilities as they are reported at contract value and not fair value in the Consolidated balance sheets. Separate account assets are recorded in Other assets in the Consolidated balance sheets.

Guaranteed living benefits

The GLB arises from life reinsurance programs covering living benefit guarantees whereby we assume the risk of guaranteed minimum income benefits (GMIB) associated with variable annuity contracts. GLB’s are recorded in Accounts payable, accrued expenses, and other liabilities and Future policy benefits in the Consolidated balance sheets. For GLB reinsurance, Chubb estimates fair value using an internal valuation model which includes current market information and estimates of policyholder behavior. All of the treaties contain claim limits, which are factored into the valuation model. The fair value depends on a number of factors, including interest rates, equity markets, credit risk, current account value, market volatility, expected annuitization rates and other policyholder behavior, and changes in policyholder mortality.

The most significant policyholder behavior assumptions include lapse rates and the GMIB annuitization rates. Assumptions regarding lapse rates and GMIB annuitization rates differ by treaty, but the underlying methodologies to determine rates applied to each treaty are comparable.

A lapse rate is the percentage of in-force policies surrendered in a given calendar year. All else equal, as lapse rates increase, ultimate claim payments will decrease.

The GMIB annuitization rate is the percentage of policies for which the policyholder will elect to annuitize using the guaranteed benefit provided under the GMIB. All else equal, as GMIB annuitization rates increase, ultimate claim payments will increase, subject to treaty claim limits.

The effect of changes in key market factors on assumed lapse and annuitization rates reflect emerging trends using data available from cedants. For treaties with limited experience, rates are established in line with data received from other ceding companies adjusted, as appropriate, with industry estimates. The model and related assumptions are regularly re-evaluated by management and enhanced, as appropriate, based upon additional experience obtained related to policyholder behavior and availability of updated information such as market conditions, market participant assumptions, and demographics of in-force annuities. Because of the significant use of unobservable inputs including policyholder behavior, GLB reinsurance is classified within Level 3.For the three months ended March 31, 2019 and 2018, no material technical refinements were made to the model. For detailed information on our lapse and annuitization rate assumptions, refer to Note 3 to the Consolidated Financial Statements of our 2018 Form 10-K.

Financial instruments measured at fair value on a recurring basis, by valuation hierarchy

March 31, 2019	Level 1		Level 2		Level 3		Total
(in millions of U.S. dollars)
Assets:
Fixed maturities available for sale
U.S. Treasury and agency	$	3,168	$	623	$	—	$	3,791
Foreign	—		21,982		360		22,342
Corporate securities	—		26,483		1,342		27,825
Mortgage-backed securities	—		16,352		78		16,430
States, municipalities, and political subdivisions	—		10,275		—		10,275
	3,168		75,715		1,780		80,663
Equity securities	766		—		55		821
Short-term investments	1,785		1,293		—		3,078
Other investments (1)	411		342		11		764
Securities lending collateral	—		1,861		—		1,861
Investment derivative instruments	15		—		—		15
Other derivative instruments	7		—		—		7
Separate account assets	2,991		139		—		3,130
Total assets measured at fair value (1)	$	9,143	$	79,350	$	1,846	$	90,339
Liabilities:
Investment derivative instruments	$	52	$	195	$	—	$	247
Other derivative instruments	12		—		—		12
GLB (2)	—		—		338		338
Total liabilities measured at fair value	$	64	$	195	$	338	$	597

⁽¹⁾  Excluded from the table above are partially-owned investments, investment funds, and limited partnerships of $4,464 million and other investments of $91 million at March 31, 2019 measured using NAV as a practical expedient.

⁽²⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the Consolidated balance sheets.

December 31, 2018	Level 1		Level 2		Level 3		Total
(in millions of U.S. dollars)
Assets:
Fixed maturities available for sale
U.S. Treasury and agency	$	3,400	$	745	$	—	$	4,145
Foreign	—		21,071		345		21,416
Corporate securities	—		25,284		1,299		26,583
Mortgage-backed securities	—		15,479		61		15,540
States, municipalities, and political subdivisions	—		10,786		—		10,786
	3,400		73,365		1,705		78,470
Equity securities	713		—		57		770
Short-term investments	1,575		1,440		1		3,016
Other investments (1)	381		303		11		695
Securities lending collateral	—		1,926		—		1,926
Investment derivative instruments	28		—		—		28
Other derivative instruments	25		—		—		25
Separate account assets	2,686		137		—		2,823
Total assets measured at fair value (1)	$	8,808	$	77,171	$	1,774	$	87,753
Liabilities:
Investment derivative instruments	$	38	$	115	$	—	$	153
GLB (2)	—		—		452		452
Total liabilities measured at fair value	$	38	$	115	$	452	$	605

⁽¹⁾  Excluded from the table above are partially-owned investments, investment funds, and limited partnerships of $4,244 million and other investments of $95 million at December 31, 2018 measured using NAV as a practical expedient.

⁽²⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the Consolidated balance sheets.

Fair value of alternative investments

Alternative investments include investment funds, limited partnerships, and partially-owned investment companies measured at fair value using NAV as a practical expedient. The following table presents, by investment category, the expected liquidation period, fair value, and maximum future funding commitments of alternative investments:

				March 31				December 31
	Expected Liquidation Period of Underlying Assets			2019				2018
(in millions of U.S. dollars)		Fair Value		Maximum Future Funding Commitments		Fair Value		Maximum Future Funding Commitments
Financial	2 to 9 Years	$	591	$	188	$	596	$	193
Real Assets	2 to 11 Years	762		449		704		362
Distressed	2 to 7 Years	263		98		296		105
Private Credit	3 to 8 Years	134		291		147		310
Traditional	2 to 14 Years	2,331		2,573		2,362		2,735
Vintage	1 to 2 Years	125		43		56		—
Investment funds	Not Applicable	258		—		83		—
		$	4,464	$	3,642	$	4,244	$	3,705

Included in all categories in the above table, except for Investment funds, are investments for which Chubb will never have the contractual option to redeem but receives distributions based on the liquidation of the underlying assets. Further, for all categories except for Investment funds, Chubb does not have the ability to sell or transfer the investments without the consent from the general partner of individual funds.

Investment Category:	Consists of investments in private equity funds:
Financial	targeting financial services companies, such as financial institutions and insurance services worldwide
Real Assets	targeting investments related to hard, physical assets, such as real estate, infrastructure and natural resources
Distressed	targeting distressed corporate debt/credit and equity opportunities in the U.S.
Private Credit	targeting privately originated corporate debt investments, including senior secured loans and subordinated bonds
Traditional	employing traditional private equity investment strategies, such as buyout and growth equity globally
Vintage	funds where the initial fund term has expired

Investment funds

Chubb’s investment funds employ various investment strategies, such as long/short equity and arbitrage/distressed. Included in this category are investments for which Chubb has the option to redeem at agreed upon value as described in each investment fund’s subscription agreement. Depending on the terms of the various subscription agreements, investment fund investments may be redeemed monthly, quarterly, semi-annually, or annually. If Chubb wishes to redeem an investment fund investment, it must first determine if the investment fund is still in a lock-up period (a time when Chubb cannot redeem its investment so that the investment fund manager has time to build the portfolio). If the investment fund is no longer in its lock-up period, Chubb must then notify the investment fund manager of its intention to redeem by the notification date prescribed by the subscription agreement. Subsequent to notification, the investment fund can redeem Chubb’s investment within several months of the notification. Notice periods for redemption of the investment funds range between 5 and 120 days. Chubb can redeem its investment funds without consent from the investment fund managers.

Level 3 financial instruments

The following table presents the significant unobservable inputs used in the Level 3 liability valuations. Excluded from the table below are inputs used to determine the fair value of Level 3 assets which are based on single broker quotes and contain no quantitative unobservable inputs developed by management. The majority of our fixed maturities classified as Level 3 used external pricing when markets are less liquid due to the lack of market inputs (i.e., stale pricing, broker quotes).

(in millions of U.S. dollars, except for percentages)	Fair Value				Valuation Technique	Significant Unobservable Inputs	Ranges
	March 31, 2019		December 31, 2018
GLB (1)	$	338	$	452	Actuarial model	Lapse rate	3% – 32%
						Annuitization rate	0% – 42%

⁽¹⁾  Discussion of the most significant inputs used in the fair value measurement of GLB and the sensitivity of those assumptions is included within Note 3 a) Guaranteed living benefits.

The following tables present a reconciliation of the beginning and ending balances of financial instruments measured at fair value using significant unobservable inputs (Level 3):

	Assets																	Liabilities
Three Months Ended	Available-for-Sale Debt Securities									Equity securities			Short-term investments			Other investments			GLB (1)
March 31, 2019	Foreign			Corporate securities			MBS
(in millions of U.S. dollars)
Balance – beginning of period	$	345		$	1,299		$	61		$	57		$	1		$	11		$	452
Transfers into Level 3	3			5			—			—			—			—			—
Transfers out of Level 3	(15		)	—			—			—			—			—			—
Change in Net Unrealized Gains (Losses) included in OCI, including foreign exchange	6			4			—			1			—			—			—
Net Realized Gains/Losses	(1		)	1			—			(2		)	—			—			(114		)
Purchases	53			128			18			9			—			—			—
Sales	(5		)	(37		)	—			(10		)	—			—			—
Settlements	(26		)	(58		)	(1		)	—			(1		)	—			—
Balance – end of period	$	360		$	1,342		$	78		$	55		$	—		$	11		$	338
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date	$	—		$	—		$	—		$	(1	)	$	—		$	—		$	(114	)

⁽¹⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the Consolidated balance sheets. The liability for GLB reinsurance was $741 million at March 31, 2019, and $861 million at December 31, 2018, which includes a fair value derivative adjustment of $338 million and 452 million, respectively.

	Assets																		Liabilities
Three Months Ended	Available-for-Sale Debt Securities								Equity securities		Short-term investments			Other investments			Other derivative instruments		GLB (2)
March 31, 2018	Foreign			Corporate securities (1)			MBS
(in millions of U.S. dollars)
Balance – beginning of period	$	93		$	1,037		$	78	$	44	$	—		$	263		$	2	$	204
Transfers into Level 3	7			—			1		—		5			—			—		—
Transfers out of Level 3	—			(10		)	—		—		—			—			—		—
Change in Net Unrealized Gains (Losses) included in OCI, including foreign exchange	9			(3		)	—		1		—			2			—		—
Net Realized Gains/Losses	—			—			—		2		—			—			—		(37		)
Purchases	87			139			4		17		8			14			—		—
Sales	(19		)	(51		)	—		—		—			—			—		—
Settlements	(1		)	(39		)	—		—		(1		)	(9		)	—		—
Balance – end of period	$	176		$	1,073		$	83	$	64	$	12		$	270		$	2	$	167
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date	$	—		$	—		$	—	$	—	$	—		$	—		$	—	$	(37	)

⁽¹⁾  Purchases in Level 3 primarily consist of privately-placed fixed income securities.

⁽²⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the Consolidated balance sheets. The liability for GLB reinsurance was $529 million at March 31, 2018, and $550 million at December 31, 2017, which includes a fair value derivative adjustment of $167 million and $204 million, respectively.

b) Financial instruments disclosed, but not measured, at fair value

Chubb uses various financial instruments in the normal course of its business. Our insurance contracts are excluded from fair value of financial instruments accounting guidance, and therefore, are not included in the amounts discussed below.

The carrying values of cash, other assets, other liabilities, and other financial instruments not included below approximated their fair values.

Refer to the 2018 Form 10-K for information on the fair value methods and assumptions for investments in partially-owned insurance companies, short-term and long-term debt, repurchase agreements, and trust-preferred securities.

The following tables present fair value, by valuation hierarchy, and carrying value of the financial instruments not measured at fair value:

March 31, 2019	Fair Value								Carrying Value
(in millions of U.S. dollars)	Level 1		Level 2		Level 3		Total
Assets:
Fixed maturities held to maturity
U.S. Treasury and agency	$	1,098	$	54	$	—	$	1,152	$	1,144
Foreign	—		1,534		—		1,534		1,503
Corporate securities	—		2,509		30		2,539		2,543
Mortgage-backed securities	—		2,494		—		2,494		2,484
States, municipalities, and political subdivisions	—		5,521		—		5,521		5,462
Total assets	$	1,098	$	12,112	$	30	$	13,240	$	13,136
Liabilities:
Repurchase agreements	$	—	$	1,419	$	—	$	1,419	$	1,419
Short-term debt	—		512		—		512		509
Long-term debt	—		12,719		—		12,719		12,071
Trust preferred securities	—		425		—		425		308
Total liabilities	$	—	$	15,075	$	—	$	15,075	$	14,307

December 31, 2018	Fair Value								Carrying Value
(in millions of U.S. dollars)	Level 1		Level 2		Level 3		Total
Assets:
Fixed maturities held to maturity
U.S. Treasury and agency	$	1,128	$	54	$	—	$	1,182	$	1,185
Foreign	—		1,542		—		1,542		1,549
Corporate securities	—		2,477		31		2,508		2,601
Mortgage-backed securities	—		2,486		—		2,486		2,524
States, municipalities, and political subdivisions	—		5,541		—		5,541		5,576
Total assets	$	1,128	$	12,100	$	31	$	13,259	$	13,435
Liabilities:
Repurchase agreements	$	—	$	1,418	$	—	$	1,418	$	1,418
Short-term debt	—		516		—		516		509
Long-term debt	—		12,181		—		12,181		12,087
Trust preferred securities	—		409		—		409		308
Total liabilities	$	—	$	14,524	$	—	$	14,524	$	14,322

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Unpaid losses and loss expenses

3 Months Ended

Mar. 31, 2019

Liability for Claims and Claims Adjustment Expense [Abstract]

Liability for Future Policy Benefits and Unpaid Claims Disclosure [Text Block]

Unpaid losses and loss expenses

The following table presents a reconciliation of beginning and ending Unpaid losses and loss expenses:

	Three Months Ended March 31
(in millions of U.S. dollars)	2019			2018
Gross unpaid losses and loss expenses – beginning of period	$	62,960		$	63,179
Reinsurance recoverable on unpaid losses - beginning of period (1)	(14,689		)	(14,014		)
Net unpaid losses and loss expenses – beginning of period	48,271			49,165
Net losses and loss expenses incurred in respect of losses occurring in:
Current year	4,326			4,358
Prior years (2)	(228		)	(256		)
Total	4,098			4,102
Net losses and loss expenses paid in respect of losses occurring in:
Current year	785			809
Prior years	3,234			3,433
Total	4,019			4,242
Foreign currency revaluation and other	86			292
Net unpaid losses and loss expenses – end of period	48,436			49,317
Reinsurance recoverable on unpaid losses (1)	14,707			13,822
Gross unpaid losses and loss expenses – end of period	$	63,143		$	63,139

⁽¹⁾  Net of provision for uncollectible reinsurance.

⁽²⁾  Relates to prior period loss reserve development only and excludes prior period development related to reinstatement premiums, expense adjustments and earned premiums totaling $24 million and $47 million for the three months ended March 31, 2019 and 2018, respectively.

Gross and net unpaid losses and loss expenses increased slightly in the quarter as the underlying reserve increase of $557 million was mostly offset by the favorable impact of prior period development and catastrophic and crop insurance payments in the quarter.

Prior Period Development

Prior period development (PPD) arises from changes to loss estimates recognized in the current year that relate to loss events that occurred in previous calendar years and excludes the effect of losses from the development of earned premium from previous accident years. Long-tail lines include lines such as workers' compensation, general liability, and professional liability; while short-tail lines include lines such as most property lines, energy, personal accident, and agriculture.

The following table summarizes (favorable) and adverse PPD by segment.

	Three Months Ended March 31
(in millions of U.S. dollars)	Long-tail			Short-tail			Total
2019
North America Commercial P&C Insurance	$	(65	)	$	(66	)	$	(131	)
North America Personal P&C Insurance	—			(10		)	(10		)
North America Agricultural Insurance	—			(61		)	(61		)
Overseas General Insurance	—			(4		)	(4		)
Global Reinsurance	(1		)	(7		)	(8		)
Corporate	10			—			10
Total	$	(56	)	$	(148	)	$	(204	)
2018
North America Commercial P&C Insurance	$	8		$	(109	)	$	(101	)
North America Personal P&C Insurance	—			(6		)	(6		)
North America Agricultural Insurance	—			(76		)	(76		)
Overseas General Insurance	—			(22		)	(22		)
Global Reinsurance	—			(14		)	(14		)
Corporate	10			—			10
Total	$	18		$	(227	)	$	(209	)

Significant prior period movements by segment, principally driven by reserve reviews completed during each respective period, are discussed in more detail below. The remaining net development for long-tail lines and short-tail business for each segment and Corporate comprises numerous favorable and adverse movements across a number of lines and accident years, none of which is significant individually or in the aggregate.

North America Commercial P&C Insurance

2019

For the three months ended March 31, 2019, net favorable PPD was $131 million, which was the net result of several underlying favorable and adverse movements, and was driven by the following principal changes:

• Net favorable development of $65 million in long-tail business, primarily from:

• Net favorable development of $57 million in professional liability (errors & omissions and cyber), mainly in the 2015 and prior accident years where case activity was less than expected, partially offset by adverse development in the 2016 accident year, which was driven by several large adverse claim developments;

• Net favorable development of $31 million in commercial excess and umbrella portfolios, driven by the 2013 and prior accident years, where case emergence was less than expected and greater weight was given to experience-based methods; this was partially offset by higher than expected claim activity in the 2015, 2016, and 2018 accident years which led to reserve strengthening in those years;

• Net favorable development of $30 million in our construction workers' compensation lines, impacting accident years 2015 and prior, and was driven by both lower than expected reported development and related favorable updates to development patterns used in our loss projection methods;

• Net adverse development of $50 million from the aggregation of general liability and automobile liability coverages within construction and wholesale portfolios, mainly impacting the 2013 through 2018 accident years, and largely the result of higher than expected reported loss development; and

• The remaining $3 million of adverse development was due to several underlying favorable and adverse movements, none of which were significant individually or in the aggregate.

• Net favorable development of $66 million in short-tail business, primarily from:

• Net favorable development of $49 million in surety business, mainly in the 2017 accident year, driven by lower than expected reported loss activity; and

• Net favorable development of $17 million was due to several underlying favorable and adverse movements, mainly driven by favorable development in A&H lines, primarily in accident years 2015 through 2017.

2018

For the three months ended March 31, 2018, net favorable PPD was $101 million, which was the net result of several underlying favorable and adverse movements, and was driven by the following principal changes:

• Net adverse development of $8 million in long-tail business, primarily from:

• Net favorable development of $29 million in commercial excess and umbrella portfolios, driven by the 2012 and prior accident years where the cumulative emergence over time has been less than expected overall and an increase in weighting towards experience-based methods, partly offset by several large settlements; additionally there was adverse claim activity in the 2014 and 2015 accident years which led to reserve strengthening in those years;

• Net favorable development of $3 million on several lines of business due to favorable claim development on the 2017 natural catastrophes; and

• Net adverse development of $40 million, mainly in 2015, 2016 and some older accident years, partially offset by favorable development in other periods, particularly in the 2014 accident year. This net adverse development consisted of several underlying favorable and adverse movements by portfolio, principally including $16 million of adverse development in wholesale general liability lines.

• Net favorable development of $109 million in short-tail business, primarily from:

• Net favorable development of $75 million in commercial property and marine businesses due to favorable claim development on the 2017 natural catastrophes; and

• Net favorable development of $34 million, principally including $19 million in surety business. The remainder was due to several underlying favorable and adverse movements, none of which were significant individually or in the aggregate.

North America Personal P&C Insurance

2019

For the three months ended March 31, 2019, net favorable PPD was $10 million in homeowners and valuables reflecting favorable claim development of $132 million on the 2017 and 2018 natural catastrophes mostly offset by adverse development of $122 million for the 2018 accident year, due to elevated non-catastrophe activity.

2018

For the three months ended March 31, 2018, net favorable PPD was $6 million, and was driven by claim development on the 2017 natural catastrophes.

North America Agricultural Insurance

For the three months ended March 31, 2019 and 2018, net favorable PPD was $61 million and $76 million, respectively. Actual claim development relates to our Multiple Peril Crop Insurance (MPCI) business and is favorable due to better than expected crop yield results in certain states at the prior year-end period (i.e., 2019 results based on crop yield results at year-end 2018).

Overseas General Insurance

2019

For the three months ended March 31, 2019, net favorable PPD was $4 million, comprising of $3 million of adverse claim development on the 2018 natural catastrophes, and $7 million of favorable development, which was the net result of several underlying favorable and adverse movements, none of which were significant individually or in the aggregate.

2018

For the three months ended March 31, 2018, net favorable PPD was $22 million, which was primarily driven by $12 million of claim development on the 2017 natural catastrophes.

Global Reinsurance

2019

For the three months ended March 31, 2019, net favorable PPD was $8 million, which was the net result of several underlying favorable and adverse movements, and was driven by the following principal changes:

• Net favorable development of $7 million in short-tail business, primarily from:

• Favorable development of $12 million, principally driven by marine, energy and surety business primarily from a favorable court ruling on an open claim; and

• Adverse development of $5 million in property catastrophe lines related to the 2018 natural catastrophes.

2018

For the three months ended March 31, 2018, net favorable PPD was $14 million, which was primarily driven by $10 million of claim development on the 2017 natural catastrophes.

Corporate

For the three months ended March 31, 2019 and 2018, adverse development was $10 million for both periods, principally related to unallocated loss adjustment expenses due to run-off operating expenses paid and incurred.

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Commitments, contingencies, and guarantees

3 Months Ended

Mar. 31, 2019

Commitments and Contingencies Disclosure [Abstract]

Commitments, contingencies, and guarantees

Commitments, contingencies, and guarantees

a) Derivative instruments

Foreign currency management

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

Derivative instruments employed

Chubb maintains positions in derivative instruments such as futures, options, swaps, and foreign currency forward contracts for which the primary purposes are to manage duration and foreign currency exposure, yield enhancement, or to obtain an exposure to a particular financial market. Chubb also maintains positions in convertible securities that contain embedded derivatives. Investment derivative instruments are recorded in either Other assets (OA) or Accounts payable, accrued expenses, and other liabilities (AP), convertible bonds are recorded in Fixed maturities available for sale (FM AFS), and convertible equity securities are recorded in Equity securities (ES) in the Consolidated balance sheets. These are the most numerous and frequent derivative transactions. In addition, Chubb purchases to be announced mortgage-backed securities (TBAs) as part of its investing activities.

Under reinsurance programs covering GLBs, Chubb assumes the risk of GLBs (principally GMIB) associated with variable annuity contracts. The GMIB risk is triggered if, at the time the contract holder elects to convert the accumulated account value to a periodic payment stream (annuitize), the accumulated account value is not sufficient to provide a guaranteed minimum level of monthly income. The GLB reinsurance product meets the definition of a derivative instrument. Benefit reserves in respect of GLBs are classified as Future policy benefits (FPB) while the fair value derivative adjustment is classified within AP. Chubb also generally maintains positions in exchange-traded equity futures contracts on equity market indices to limit equity exposure in the GMDB and GLB books of business.

All derivative instruments are carried at fair value with changes in fair value recorded in Net realized gains (losses) in the Consolidated statements of operations. None of the derivative instruments are designated as hedges for accounting purposes.

The following table presents the balance sheet locations, fair values of derivative instruments in an asset or (liability) position, and notional values/payment provisions of our derivative instruments:

				March 31, 2019							December 31, 2018
	Consolidated Balance Sheet Location	Fair Value					Notional Value/ Payment Provision		Fair Value					Notional Value/ Payment Provision
(in millions of U.S. dollars)		Derivative Asset		Derivative (Liability)					Derivative Asset		Derivative (Liability)
Investment and embedded derivative instruments:
Foreign currency forward contracts	OA / (AP)	$	9	$	(28	)	$	2,559	$	15	$	(19	)	$	2,185
Cross-currency swaps	OA / (AP)	—		—			45		—		—			45
Interest rate swaps	OA / (AP)	—		(195		)	5,250		—		(115		)	5,250
Options/Futures contracts on notes, bonds, and equities	OA / (AP)	6		(24		)	1,080		13		(19		)	1,046
Convertible securities (1)	FM AFS / ES	8		—			9		9		—			11
TBAs	FM AFS	—		—			—		6		—			6
		$	23	$	(247	)	$	8,943	$	43	$	(153	)	$	8,543
Other derivative instruments:
Futures contracts on equities(2)	OA / (AP)	$	—	$	(12	)	$	537	$	23	$	—		$	507
Other	OA / (AP)	7		—			184		2		—			74
		$	7	$	(12	)	$	721	$	25	$	—		$	581
GLB (3)	(AP) / (FPB)	$	—	$	(741	)	$	1,458	$	—	$	(861	)	$	1,750

⁽¹⁾  Includes fair value of embedded derivatives.

⁽²⁾  Related to GMDB and GLB blocks of business.

⁽³⁾  Includes both future policy benefits reserves and fair value derivative adjustment. Note that the payment provision related to GLB is the net amount at risk. The concept of a notional value does not apply to the GLB reinsurance contracts.

At March 31, 2019 and December 31, 2018, derivative liabilitiesof $234 million and $95 million, respectively, included in the table above were subject to a master netting agreement. The remaining derivatives included in the table above were not subject to a master netting agreement. 

The following table presents net realized gains (losses) related to derivative instrument activity in the Consolidated statements of operations:

	Three Months Ended
	March 31
(in millions of U.S. dollars)	2019			2018
Investment and embedded derivative instruments:
Foreign currency forward contracts	$	(15	)	$	4
Interest rate swaps	(80		)	—
All other futures contracts, options, and equities	(36		)	13
Convertible securities (1)	1			—
Total investment and embedded derivative instruments	$	(130	)	$	17
GLB and other derivative instruments:
GLB (2)	$	114		$	38
Futures contracts on equities (3)	(63		)	22
Other	(1		)	2
Total GLB and other derivative instruments	$	50		$	62
	$	(80	)	$	79

⁽¹⁾  Includes embedded derivatives.

⁽²⁾  Excludes foreign exchange gains (losses) related to GLB.

⁽³⁾  Related to GMDB and GLB blocks of business.

b) Derivative instrument objectives

(i) Foreign currency exposure management

A foreign currency forward contract (forward) is an agreement between participants to exchange specific foreign currencies at a future date. Chubb uses forwards to minimize the effect of fluctuating foreign currencies as discussed above.

(ii) Duration management and market exposure

Futures

Futures contracts give the holder the right and obligation to participate in market movements, determined by the index or underlying security on which the futures contract is based. Settlement is made daily in cash by an amount equal to the change in value of the futures contract times a multiplier that scales the size of the contract. Exchange-traded futures contracts on money market instruments, notes, and bonds are used in fixed maturity portfolios to more efficiently manage duration, as substitutes for ownership of the money market instruments, bonds, and notes without significantly increasing the risk in the portfolio. Investments in futures contracts may be made only to the extent that there are assets under management not otherwise committed.

Exchange-traded equity futures contracts are used to limit exposure to a severe equity market decline, which would cause an increase in expected claims and therefore, an increase in reserves for GMDB and GLB reinsurance business.

Options

An option contract conveys to the holder the right, but not the obligation, to purchase or sell a specified amount or value of an underlying security at a fixed price. Option contracts are used in our investment portfolio as protection against unexpected shifts in interest rates, which would affect the duration of the fixed maturity portfolio. By using options in the portfolio, the overall interest rate sensitivity of the portfolio can be reduced. Option contracts may also be used as an alternative to futures contracts in the synthetic strategy as described above.

The price of an option is influenced by the underlying security, expected volatility, time to expiration, and supply and demand.

The credit risk associated with the above derivative financial instruments relates to the potential for non-performance by counterparties. Although non-performance is not anticipated, in order to minimize the risk of loss, management monitors the creditworthiness of its counterparties and obtains collateral. The performance of exchange-traded instruments is guaranteed by the exchange on which they trade. For non-exchange-traded instruments, the counterparties are principally banks which must meet certain criteria according to our investment guidelines.

Interest rate swaps

An interest rate swap is a contract between two counterparties in which interest payments are made based on a notional principal amount, which itself is never paid or received. Under the terms of an interest rate swap, one counterparty makes interest payments based on a fixed interest rate and the other counterparty’s payments are based on a floating rate. Interest rate swap contracts are used occasionally in our investment portfolio as protection against unexpected shifts in interest rates, which would affect the fair value of the fixed maturity portfolio. By using interest rate swaps in the portfolio, the overall duration or interest rate sensitivity of the portfolio can be impacted.

Cross-currency swaps

Cross-currency swaps are agreements under which two counterparties exchange interest payments and principal denominated in different currencies at a future date. We use cross-currency swaps to reduce the foreign currency and interest rate risk by converting cash flows back into local currency. We invest in foreign currency denominated investments to improve credit diversification and also to obtain better duration matching to our liabilities that is limited in the local currency market.

Other

Included within Other are derivatives intended to reduce potential losses which may arise from certain exposures in our insurance business. The economic benefit provided by these derivatives is similar to purchased reinsurance. For example, Chubb may enter into crop derivative contracts to protect underwriting results in the event of a significant decline in commodity prices.

(iii) Convertible security investments

A convertible security is a debt instrument or preferred stock that can be converted into a predetermined amount of the issuer’s equity. The convertible option is an embedded derivative within the host instruments which are classified in the investment portfolio as either available for sale or as an equity security. Chubb purchases convertible securities for their total return and not specifically for the conversion feature.

(iv) TBA

By acquiring TBAs, we make a commitment to purchase a future issuance of mortgage-backed securities. For the period between purchase of the TBAs and issuance of the underlying security, we account for our position as a derivative in the consolidated financial statements. Chubb purchases TBAs both for their total return and for the flexibility they provide related to our mortgage-backed security strategy.

(v) GLB

Under the GLB program, as the assuming entity, Chubb is obligated to provide coverage until the expiration or maturity of the underlying deferred annuity contracts or the expiry of the reinsurance treaty. Premiums received under the reinsurance treaties are classified as premium. Expected losses allocated to premiums received are classified as Future policy benefits and valued similar to GMDB reinsurance. Other changes in fair value arise principally from changes in expected losses allocated to expected future premiums. Fair value represents management’s estimate of an exit price and thus, includes a risk margin. We may recognize a realized loss for other changes in fair value due to adverse changes in the capital markets (e.g., declining interest rates and/or declining U.S. and/or international equity markets) and changes in actual or estimated future policyholder behavior (e.g., increased annuitization or decreased lapse rates) although we expect the business to be profitable.

To mitigate adverse changes in the capital markets, we maintain positions in exchange-traded equity futures contracts, as noted under section "(ii) Futures" above. These futures increase in fair value when the S&P 500 index decreases (and decrease in fair value when the S&P 500 index increases). The net impact of gains or losses related to changes in fair value of the GLB liability and the exchange-traded equity futures are included in Net realized gains (losses).

c) Securities lending and secured borrowings

Chubb participates in a securities lending program operated by a third-party banking institution whereby certain assets are loaned to qualified borrowers and from which we earn an incremental return. The securities lending collateral can only be drawn down by Chubb in the event that the institution borrowing the securities is in default under the lending agreement. An indemnification agreement with the lending agent protects us in the event a borrower becomes insolvent or fails to return any of the securities on loan.The collateral is recorded in Securities lending collateral and the liability is recorded in Securities lending payable in the Consolidated balance sheets.

The following table presents the carrying value of collateral held under securities lending agreements by investment category and remaining contractual maturity of the underlying agreements:

	Remaining contractual maturity
	March 31		December 31
	2019		2018
(in millions of U.S. dollars)	Overnight and Continuous
Collateral held under securities lending agreements:
Cash	$	846	$	756
U.S. Treasury and agency	60		64
Foreign	655		795
Corporate securities	29		15
Mortgage-backed securities	47		45
Equity securities	224		251
	$	1,861	$	1,926
Gross amount of recognized liability for securities lending payable	$	1,861	$	1,926

AtMarch 31, 2019andDecember 31, 2018, our repurchase agreement obligations of$1,419 millionand$1,418 million, respectively, were fully collateralized. In contrast to securities lending programs, the use of cash received is not restricted for the repurchase obligations.The fair value of the underlying securities sold remains in Fixed maturities available for sale and the repurchase agreement obligation is recorded in Repurchase agreements in the Consolidated balance sheets.  

The following table presents the carrying value of collateral pledged under repurchase agreements by investment category and remaining contractual maturity of the underlying agreements:

	Remaining contractual maturity
	March 31, 2019						December 31, 2018
	Up to 30 Days		Greater than 90 Days		Total		30-90 Days		Greater than 90 Days		Total
(in millions of U.S. dollars)
Collateral pledged under repurchase agreements:
U.S. Treasury and agency	$	255	$	9	$	264	$	—	$	259	$	259
Mortgage-backed securities	330		884		1,214		496		713		1,209
	$	585	$	893	$	1,478	$	496	$	972	$	1,468
Gross amount of recognized liabilities for repurchase agreements					$	1,419					$	1,418
Difference (1)					$	59					$	50

⁽¹⁾  Per the repurchase agreements, the amount of collateral posted is required to exceed the amount of gross liability.

Potential risks exist in our secured borrowing transactions due to market conditions and counterparty exposure. With collateral that we pledge, there is a risk that the collateral may not be returned at the expiration of the agreement. If the counterparty fails to return the collateral, Chubb will have free use of the borrowed funds until our collateral is returned. In addition, we may encounter the risk that Chubb may not be able to renew outstanding borrowings with a new term or with an existing counterparty due to market conditions including a decrease in demand as well as more restrictive terms from banks due to increased regulatory and capital constraints. Should this condition occur, Chubb may seek alternative borrowing sources or reduce borrowings. Additionally, increased margins and collateral requirements due to market conditions would increase our restricted assets as we are required to provide additional collateral to support the transaction.

d) Fixed maturities

At March 31, 2019, we have commitments to purchase fixed income securities of $792 million over the next several years.

e) Other investments

At March 31, 2019, included in Other investments in the Consolidated balance sheets are investments in limited partnerships and partially-owned investment companies with a carrying value of $4.2 billion. In connection with these investments, we have commitments that may require funding of up to $3.6 billion over the next several years.

f) Income Taxes

At March 31, 2019, $14 million of unrecognized tax benefits remain outstanding. It is reasonably possible that over the next twelve months, that the amount of unrecognized tax benefits may change resulting from the re-evaluation of unrecognized tax benefits arising from examinations by taxing authorities and the lapses of statutes of limitations. With few exceptions, Chubb is no longer subject to income tax examinations for years before 2010.

g) Legal proceedings

Our insurance subsidiaries are subject to claims litigation involving disputed interpretations of policy coverages and, in some jurisdictions, direct actions by allegedly-injured persons seeking damages from policyholders. These lawsuits, involving claims on policies issued by our subsidiaries which are typical to the insurance industry in general and in the normal course of business, are considered in our loss and loss expense reserves. In addition to claims litigation, we are subject to lawsuits and regulatory actions in the normal course of business that do not arise from or directly relate to claims on insurance policies. This category of business litigation typically involves, among other things, allegations of underwriting errors or misconduct, employment claims, regulatory activity, or disputes arising from our business ventures. In the opinion of management, our ultimate liability for these matters could be, but we believe is not likely to be, material to our consolidated financial condition and results of operations.

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Share-based compensation

3 Months Ended

Mar. 31, 2019

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-based compensation

Share-based compensation

The Chubb Limited 2016 Long-Term Incentive Plan (the 2016 LTIP) permits grants of both incentive and non-qualified stock options principally at an option price per share equal to the grant date fair value of Chubb's Common Shares. Stock options are generally granted with a 3-year vesting period and a 10-year term. Stock options typically vest in equal annual installments over the respective vesting period, which is also the requisite service period. On February 28, 2019, Chubb granted 2,073,712 stock options with a weighted-average grant date fair value of $18.79 each. The fair value of the options issued is estimated on the grant date using the Black-Scholes option pricing model.

The 2016 LTIP also permits grants of service-based restricted stock and restricted stock units as well as performance-based restricted stock awards. Chubb generally grants service-based restricted stock and restricted stock units with a 4-year vesting period, based on a graded vesting schedule. Beginning in 2017, the performance-based restricted stock awards granted comprise target awards and premium awards that cliff vest at the end of a 3-year performance period based on both tangible book value (shareholders' equity less goodwill and intangible assets, net of tax) per share growth and P&C combined ratio compared to a defined group of peer companies. Premium awards are subject to an additional vesting provision based on total shareholder return compared to our peer group. The restricted stock is granted at market close price on the grant date. On February 28, 2019, Chubb granted 1,078,247 service-based restricted stock awards, 357,463 service-based restricted stock units, and 212,059 performance-based stock awards to employees and officers with a grant date fair value of $133.90 each. Each restricted stock unit represents our obligation to deliver to the holder one Common Share upon vesting.

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Shareholders' equity

3 Months Ended

Mar. 31, 2019

Stockholders' Equity Note [Abstract]

Shareholders' equity

Shareholders’ equity

All of Chubb’s Common Shares are authorized under Swiss corporate law. Though the par value of Common Shares is stated in Swiss francs, Chubb continues to use U.S. dollars as its reporting currency for preparing consolidated financial statements. Under Swiss corporate law, dividends, including distributions through a reduction in par value (par value reduction) or from legal reserves, must be stated in Swiss francs though dividend payments are made by Chubb in U.S. dollars. At March 31, 2019, our Common Shares had a par value of CHF 24.15 per share.

At our May 2018 and 2017 annual general meetings, our shareholders approved an annual dividend for the following year of up to $2.92per share and$2.84 per share, respectively, which was paid in four quarterly installments of $0.73per share and$0.71 per share, respectively, at dates determined by the Board of Directors (Board) after the annual general meetings by way of a distribution from capital contribution reserves, transferred to free reserves for payment.

Dividend distributions per Common Share for the three months endedMarch 31, 2019 and 2018 were $0.73 (CHF 0.72) and $0.71 (CHF 0.66), respectively.

Common Shares in treasury are used principally for issuance upon the exercise of employee stock options, grants of restricted stock, and purchases under the Employee Stock Purchase Plan (ESPP). At March 31, 2019, 21,604,659 Common Shares remain in treasury after net shares redeemed under employee share-based compensation plans.

Chubb Limited securities repurchase authorization

In December 2017, the Board authorized a share repurchase program of $1.0 billion of Chubb's Common Shares from January 1, 2018 through December 31, 2018. In December 2018, our Board authorized the repurchase of up to $1.5 billion of Chubb's Common Shares from December 1, 2018 through December 31, 2019.

The following table presents repurchases of Chubb's Common Shares conducted in a series of open market transactions under the Board authorizations:

	Three Months Ended March 31				April 1, 2019 through May 1, 2019
(in millions of U.S. dollars, except share data)	2019		2018
Number of shares repurchased	2,753,754		—		550,000
Cost of shares repurchased	$	367	$	—	$	77
Repurchase authorization remaining at end of period	$	1,112	$	1,000	$	1,035

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Postretirement benefits

3 Months Ended

Mar. 31, 2019

Retirement Benefits [Abstract]

Compensation and Employee Benefit Plans [Text Block]

Postretirement benefits

The components of net pension and other postretirement benefit costs (benefits) reflected in Net income in the Consolidated statements of operations were as follows:

	Pension Benefit Plans												Other Postretirement Benefit Plans
	2019						2018						2019			2018
Three Months Ended March 31	U.S. Plans			Non-U.S. Plans			U.S. Plans			Non-U.S. Plans
(in millions of U.S. dollars)
Service cost	$	12		$	3		$	14		$	3		$	—		$	—
Non-service cost:
Interest cost	30			7			26			7			1			1
Expected return on plan assets	(47		)	(11		)	(53		)	(13		)	(1		)	(1		)
Amortization of prior service cost	—			—			—			—			(20		)	(21		)
Total non-service (benefit) cost	(17		)	(4		)	(27		)	(6		)	(20		)	(21		)
Net periodic (benefit) cost	$	(5	)	$	(1	)	$	(13	)	$	(3	)	$	(20	)	$	(21	)

The service and non-service cost components of net periodic (benefit) cost reflected in the Consolidated statements of operations were as follows:

	Pension Benefit Plans						Other Postretirement Benefit Plans
Three Months Ended March 31	2019			2018			2019			2018
(in millions of U.S. dollars)
Service Cost:
Losses and loss expenses	$	2		$	2		$	—		$	—
Administrative expenses	13			15			—			—
Total service cost	15			17			—			—
Non-service Cost:
Losses and loss expenses	(2		)	(3		)	(2		)	(1		)
Administrative expenses	(19		)	(30		)	(18		)	(20		)
Total non-service (benefit) cost	(21		)	(33		)	(20		)	(21		)
Net periodic (benefit) cost	$	(6	)	$	(16	)	$	(20	)	$	(21	)

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Segment information

3 Months Ended

Mar. 31, 2019

Segment Reporting [Abstract]

Segment information

Segment information

Chubb operates through six business segments: North America Commercial P&C Insurance, North America Personal P&C Insurance, North America Agricultural Insurance, Overseas General Insurance, Global Reinsurance, and Life Insurance.

Corporate results primarily include income and expenses not attributable to reportable segments and loss and loss expenses of asbestos and environmental (A&E) liabilities.

For segment reporting purposes, certain items are presented in a different manner below than in the consolidated financial statements. Management uses underwriting income (loss) as the main measures of segment performance. Chubb calculates underwriting income (loss) by subtracting Losses and loss expenses, Policy benefits, Policy acquisition costs, and Administrative expenses from Net premiums earned. To calculate Segment income (loss), include Net investment income (loss), Other (income) expense, and Amortization of purchased intangibles. For the North America Agricultural Insurance segment, management includes gains and losses on crop derivatives as a component of underwriting income (loss). For example, for the three months ended March 31, 2019, underwriting income in our North America Agricultural Insurance segment was $73 million. This amount includes $1 million of realized losses related to crop derivatives which are reported in Net realized gains (losses) in the Corporate column below.

For the Life Insurance segment, management includes Net investment income and (Gains) losses from fair value changes in separate account assets that do not qualify for separate account reporting under GAAP as components of Life Insurance underwriting income. For example, for the three months ended March 31, 2019, Life Insurance underwriting income of $75 million includes Net investment income of $89 million and gains from fair value changes in separate account assets of $30 million. The gains from fair value changes in separate account assets are reported in Other (income) expense in the table below.

The following tables present the Statement of Operations by segment:

For the Three Months Ended March 31, 2019 (in millions of U.S. dollars)	North America Commercial P&C Insurance			North America Personal P&C Insurance		North America Agricultural Insurance			Overseas General Insurance		Global Reinsurance			Life Insurance			Corporate			Chubb Consolidated
Net premiums written	$	2,951		$	1,056	$	130		$	2,395	$	202		$	579		$	—		$	7,313
Net premiums earned	3,085			1,154		55			2,114		168			561			—			7,137
Losses and loss expenses	1,973			757		(27		)	1,106		76			202			11			4,098
Policy benefits	—			—		—			—		—			196			—			196
Policy acquisition costs	459			231		7			596		43			128			—			1,464
Administrative expenses	240			68		1			249		10			79			63			710
Underwriting income (loss)	413			98		74			163		39			(44		)	(74		)	669
Net investment income (loss)	510			64		10			144		56			89			(37		)	836
Other (income) expense	(5		)	—		—			4		(9		)	(40		)	11			(39		)
Amortization expense of purchased intangibles	—			3		7			11		—			—			55			76
Segment income (loss)	$	928		$	159	$	77		$	292	$	104		$	85		$	(177	)	$	1,468
Net realized gains (losses) including OTTI																	(97		)	(97		)
Interest expense																	140			140
Chubb integration expenses																	3			3
Income tax expense																	188			188
Net income (loss)																	$	(605	)	$	1,040

For the Three Months Ended March 31, 2018 (in millions of U.S. dollars)	North America Commercial P&C Insurance			North America Personal P&C Insurance			North America Agricultural Insurance			Overseas General Insurance		Global Reinsurance			Life Insurance			Corporate			Chubb Consolidated
Net premiums written	$	2,812		$	1,048		$	108		$	2,384	$	193		$	559		$	—		$	7,104
Net premiums earned	3,029			1,140			43			2,107		168			540			—			7,027
Losses and loss expenses	1,908			886			(53		)	1,078		67			205			11			4,102
Policy benefits	—			—			—			—		—			151			—			151
Policy acquisition costs	472			237			(1		)	588		40			128			—			1,464
Administrative expenses	231			65			(3		)	239		10			78			72			692
Underwriting income (loss)	418			(48		)	100			202		51			(22		)	(83		)	618
Net investment income (loss)	503			59			7			151		64			83			(61		)	806
Other (income) expense	(6		)	—			—			7		(7		)	(4		)	(37		)	(47		)
Amortization expense of purchased intangibles	—			3			7			10		—			1			64			85
Segment income (loss)	$	927		$	8		$	100		$	336	$	122		$	64		$	(171	)	$	1,386
Net realized gains (losses) including OTTI																		(2		)	(2		)
Interest expense																		157			157
Chubb integration expenses																		10			10
Income tax expense																		135			135
Net income (loss)																		$	(475	)	$	1,082

Underwriting assets are reviewed in total by management for purposes of decision-making. Other than Unpaid losses and loss expenses, Reinsurance recoverables, Goodwill and Other intangible assets, Chubb does not allocate assets to its segments.

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Earnings per share

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Earnings per share

Earnings per share

	Three Months Ended
	March 31
(in millions of U.S. dollars, except share and per share data)	2019		2018
Numerator:
Net income	$	1,040	$	1,082
Denominator:
Denominator for basic earnings per share:
Weighted-average shares outstanding	458,805,185		465,703,240
Denominator for diluted earnings per share:
Share-based compensation plans	2,731,755		3,770,351
Weighted-average shares outstanding and assumed conversions	461,536,940		469,473,591
Basic earnings per share	$	2.27	$	2.32
Diluted earnings per share	$	2.25	$	2.30
Potential anti-dilutive share conversions	4,343,204		2,116,188

Excluded from weighted-average shares outstanding and assumed conversions is the impact of securities that would have been anti-dilutive during the respective periods.

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Information provided in connection with outstanding debt of subsidiaries

3 Months Ended

Mar. 31, 2019

Disclosure Text Block Supplement [Abstract]

Information provided in connection with outstanding debt of subsidiaries

Information provided in connection with outstanding debt of subsidiaries

The following tables present condensed consolidating financial information at March 31, 2019 and December 31, 2018, and for the three months ended March 31, 2019 and 2018 for Chubb Limited (Parent Guarantor) and Chubb INA Holdings Inc. (Subsidiary Issuer). The Subsidiary Issuer is an indirect 100 percent-owned subsidiary of the Parent Guarantor. The Parent Guarantor fully and unconditionally guarantees certain of the debt of the Subsidiary Issuer. Condensed consolidating financial information of the Parent Guarantor and Subsidiary Issuer are presented on the equity method of accounting. The revenues and expenses and cash flows of the subsidiaries of the Subsidiary Issuer are presented in the Other Chubb Limited Subsidiaries column on a combined basis.

Condensed Consolidating Balance Sheet at March 31, 2019

(in millions of U.S. dollars)	Chubb Limited (Parent Guarantor)		Chubb INA Holdings Inc. (Subsidiary Issuer)		Other Chubb Limited Subsidiaries		Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
Assets
Investments	$	—	$	229	$	103,031	$	—		$	103,260
Cash (1)	2		71		2,220		(1,022		)	1,271
Restricted cash	—		—		122		—			122
Insurance and reinsurance balances receivable	—		—		11,491		(1,665		)	9,826
Reinsurance recoverable on losses and loss expenses	—		—		26,232		(10,095		)	16,137
Reinsurance recoverable on policy benefits	—		—		306		(103		)	203
Value of business acquired	—		—		289		—			289
Goodwill and other intangible assets	—		—		21,419		—			21,419
Investments in subsidiaries	45,648		51,996		—		(97,644		)	—
Due from subsidiaries and affiliates, net	7,358		—		616		(7,974		)	—
Other assets	9		488		20,170		(1,847		)	18,820
Total assets	$	53,017	$	52,784	$	185,896	$	(120,350	)	$	171,347
Liabilities
Unpaid losses and loss expenses	$	—	$	—	$	72,998	$	(9,855	)	$	63,143
Unearned premiums	—		—		17,039		(1,130		)	15,909
Future policy benefits	—		—		5,655		(103		)	5,552
Due to subsidiaries and affiliates, net	—		7,974		—		(7,974		)	—
Affiliated notional cash pooling programs (1)	331		691		—		(1,022		)	—
Repurchase agreements	—		—		1,419		—			1,419
Short-term debt	—		500		9		—			509
Long-term debt	—		12,070		1		—			12,071
Trust preferred securities	—		308		—		—			308
Other liabilities	331		1,894		20,478		(2,622		)	20,081
Total liabilities	662		23,437		117,599		(22,706		)	118,992
Total shareholders’ equity	52,355		29,347		68,297		(97,644		)	52,355
Total liabilities and shareholders’ equity	$	53,017	$	52,784	$	185,896	$	(120,350	)	$	171,347

⁽¹⁾  Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Various Chubb entities participate in one or the other of the Pools, pursuant to which credit and debit balances in individual Chubb accounts are translated daily into a single currency and pooled on a notional basis. Individual Chubb entities are permitted to overdraw on their individual accounts provided the overall Pool balances do not fall below zero. At March 31, 2019, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

Condensed Consolidating Balance Sheet at December 31, 2018

(in millions of U.S. dollars)	Chubb Limited (Parent Guarantor)		Chubb INA Holdings Inc. (Subsidiary Issuer)		Other Chubb Limited Subsidiaries		Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
Assets
Investments	$	—	$	214	$	100,754	$	—		$	100,968
Cash (1)	1		2		1,896		(652		)	1,247
Restricted cash	—		—		93		—			93
Insurance and reinsurance balances receivable	—		—		11,861		(1,786		)	10,075
Reinsurance recoverable on losses and loss expenses	—		—		26,422		(10,429		)	15,993
Reinsurance recoverable on policy benefits	—		—		306		(104		)	202
Value of business acquired	—		—		295		—			295
Goodwill and other intangible assets	—		—		21,414		—			21,414
Investments in subsidiaries	43,531		50,209		—		(93,740		)	—
Due from subsidiaries and affiliates, net	7,074		—		598		(7,672		)	—
Other assets	3		1,007		18,102		(1,628		)	17,484
Total assets	$	50,609	$	51,432	$	181,741	$	(116,011	)	$	167,771
Liabilities
Unpaid losses and loss expenses	$	—	$	—	$	72,857	$	(9,897	)	$	62,960
Unearned premiums	—		—		16,611		(1,079		)	15,532
Future policy benefits	—		—		5,610		(104		)	5,506
Due to subsidiaries and affiliates, net	—		7,672		—		(7,672		)	—
Affiliated notional cash pooling programs (1)	35		617		—		(652		)	—
Repurchase agreements	—		—		1,418		—			1,418
Short-term debt	—		500		9		—			509
Long-term debt	—		12,086		1		—			12,087
Trust preferred securities	—		308		—		—			308
Other liabilities	262		2,545		19,199		(2,867		)	19,139
Total liabilities	297		23,728		115,705		(22,271		)	117,459
Total shareholders’ equity	50,312		27,704		66,036		(93,740		)	50,312
Total liabilities and shareholders’ equity	$	50,609	$	51,432	$	181,741	$	(116,011	)	$	167,771

⁽¹⁾  Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Various Chubb entities participate in one or the other of the Pools, pursuant to which credit and debit balances in individual Chubb accounts are translated daily into a single currency and pooled on a notional basis. Individual Chubb entities are permitted to overdraw on their individual accounts provided the overall Pool balances do not fall below zero. At December 31, 2018, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

Condensed Consolidating Statements of Operations and Comprehensive Income

For the Three Months Ended March 31, 2019	Chubb Limited (Parent Guarantor)			Chubb INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net premiums written	$	—		$	—		$	7,313		$	—		$	7,313
Net premiums earned	—			—			7,137			—			7,137
Net investment income	1			(4		)	839			—			836
Equity in earnings of subsidiaries	990			759			—			(1,749		)	—
Net realized gains (losses) including OTTI	1			(13		)	(85		)	—			(97		)
Losses and loss expenses	—			—			4,098			—			4,098
Policy benefits	—			—			196			—			196
Policy acquisition costs and administrative expenses	20			(15		)	2,169			—			2,174
Interest (income) expense	(66		)	185			21			—			140
Other (income) expense	(6		)	3			(36		)	—			(39		)
Amortization of purchased intangibles	—			—			76			—			76
Chubb integration expenses	—			2			1			—			3
Income tax expense (benefit)	4			(42		)	226			—			188
Net income	$	1,040		$	609		$	1,140		$	(1,749	)	$	1,040
Comprehensive income	$	2,718		$	1,941		$	2,788		$	(4,729	)	$	2,718

Condensed Consolidating Statements of Operations and Comprehensive Income

For the Three Months Ended March 31, 2018	Chubb Limited (Parent Guarantor)			Chubb INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net premiums written	$	—		$	—		$	7,104		$	—		$	7,104
Net premiums earned	—			—			7,027			—			7,027
Net investment income	2			4			800			—			806
Equity in earnings of subsidiaries	1,022			885			—			(1,907		)	—
Net realized gains (losses) including OTTI	(2		)	(24		)	24			—			(2		)
Losses and loss expenses	—			—			4,102			—			4,102
Policy benefits	—			—			151			—			151
Policy acquisition costs and administrative expenses	18			22			2,116			—			2,156
Interest (income) expense	(80		)	209			28			—			157
Other (income) expense	(5		)	8			(50		)	—			(47		)
Amortization of purchased intangibles	—			—			85			—			85
Chubb integration expenses	2			1			7			—			10
Income tax expense (benefit)	5			(59		)	189			—			135
Net income	$	1,082		$	684		$	1,223		$	(1,907	)	$	1,082
Comprehensive income	$	453		$	216		$	614		$	(830	)	$	453

Condensed Consolidating Statement of Cash Flows

For the Three Months Ended March 31, 2019	Chubb Limited (Parent Guarantor)			Chubb INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net cash flows from (used for) operating activities	$	307		$	(163	)	$	1,378		$	(200	)	$	1,322
Cash flows from investing activities
Purchases of fixed maturities available for sale	—			(3		)	(5,558		)	—			(5,561		)
Purchases of fixed maturities held to maturity	—			—			(1		)	—			(1		)
Purchases of equity securities	—			—			(49		)	—			(49		)
Sales of fixed maturities available for sale	—			—			3,293			—			3,293
Sales of equity securities	—			—			60			—			60
Maturities and redemptions of fixed maturities available for sale	—			6			1,825			—			1,831
Maturities and redemptions of fixed maturities held to maturity	—			—			280			—			280
Net change in short-term investments	—			(3		)	(36		)	—			(39		)
Net derivative instruments settlements	—			(28		)	(330		)	—			(358		)
Private equity contributions	—			—			(410		)	—			(410		)
Private equity distributions	—			—			368			—			368
Capital contribution	—			(110		)	—			110			—
Other	—			(12		)	(75		)	—			(87		)
Net cash flows used for investing activities	—			(150		)	(633		)	110			(673		)
Cash flows from financing activities
Dividends paid on Common Shares	(336		)	—			—			—			(336		)
Common Shares repurchased	—			—			(367		)	—			(367		)
Proceeds from issuance of repurchase agreements	—			—			471			—			471
Repayment of repurchase agreements	—			—			(470		)	—			(470		)
Proceeds from share-based compensation plans	—			—			35			—			35
Dividend to parent company	—			—			(200		)	200			—
Advances (to) from affiliates	(266		)	308			(42		)	—			—
Capital contribution	—			—			110			(110		)	—
Net proceeds from affiliated notional cash pooling programs (1)	296			74			—			(370		)	—
Policyholder contract deposits	—			—			115			—			115
Policyholder contract withdrawals	—			—			(78		)	—			(78		)
Net cash flows from (used for) financing activities	(306		)	382			(426		)	(280		)	(630		)
Effect of foreign currency rate changes on cash and restricted cash	—			—			34			—			34
Net increase in cash and restricted cash	1			69			353			(370		)	53
Cash and restricted cash – beginning of period (1)	1			2			1,989			(652		)	1,340
Cash and restricted cash – end of period (1)	$	2		$	71		$	2,342		$	(1,022	)	$	1,393

⁽¹⁾  Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Various Chubb entities participate in one or the other of the Pools, pursuant to which credit and debit balances in individual Chubb accounts are translated daily into a single currency and pooled on a notional basis. Individual Chubb entities are permitted to overdraw on their individual accounts provided the overall Pool balances do not fall below zero. At March 31, 2019 and December 31, 2018, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

Condensed Consolidating Statement of Cash Flows

For the Three Months Ended March 31, 2018	Chubb Limited (Parent Guarantor)			Chubb INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net cash flows from operating activities	$	24		$	2,727		$	800		$	(3,000	)	$	551
Cash flows from investing activities
Purchases of fixed maturities available for sale	—			(8		)	(5,964		)	—			(5,972		)
Purchases of fixed maturities held to maturity	—			—			(162		)	—			(162		)
Purchases of equity securities	—			—			(55		)	—			(55		)
Sales of fixed maturities available for sale	—			—			2,562			—			2,562
Sales of equity securities	—			—			40			—			40
Maturities and redemptions of fixed maturities    available for sale	—			3			1,862			—			1,865
Maturities and redemptions of fixed maturities held to maturity	—			—			255			—			255
Net change in short-term investments	—			(14		)	745			—			731
Net derivative instruments settlements	—			(7		)	46			—			39
Private equity contributions	—			—			(353		)	—			(353		)
Private equity distributions	—			—			201			—			201
Capital contribution	(750		)	(3,500		)	—			4,250			—
Other	—			(3		)	(29		)	—			(32		)
Net cash flows used for investing activities	(750		)	(3,529		)	(852		)	4,250			(881		)
Cash flows from financing activities
Dividends paid on Common Shares	(330		)	—			—			—			(330		)
Common Shares repurchased	—			—			(29		)	—			(29		)
Proceeds from issuance of long-term debt	—			2,175			—			—			2,175
Repayment of long-term debt	—			(300		)	—			—			(300		)
Proceeds from issuance of repurchase agreements	—			—			408			—			408
Repayment of repurchase agreements	—			—			(404		)	—			(404		)
Proceeds from share-based compensation plans	—			—			34			—			34
Dividend to parent company	—			—			(3,000		)	3,000			—
Advances (to) from affiliates	656			(95		)	(561		)	—			—
Capital contribution	—			—			4,250			(4,250		)	—
Net proceeds from (payments to) affiliated notional cash pooling programs (1)	400			(115		)	—			(285		)	—
Policyholder contract deposits	—			—			118			—			118
Policyholder contract withdrawals	—			—			(105		)	—			(105		)
Net cash flows from financing activities	726			1,665			711			(1,535		)	1,567
Effect of foreign currency rate changes on cash and restricted cash	(2		)	—			27			—			25
Net increase (decrease) in cash and restricted cash	(2		)	863			686			(285		)	1,262
Cash and restricted cash – beginning of period (1)	3			1			962			(115		)	851
Cash and restricted cash – end of period (1)	$	1		$	864		$	1,648		$	(400	)	$	2,113

⁽¹⁾  Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Various Chubb entities participate in one or the other of the Pools, pursuant to which credit and debit balances in individual Chubb accounts are translated daily into a single currency and pooled on a notional basis. Individual Chubb entities are permitted to overdraw on their individual accounts provided the overall Pool balances do not fall below zero. At March 31, 2018 and December 31, 2017, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

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General (Policies)

3 Months Ended

Mar. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of presentation

Basis of presentation

Chubb Limited is a holding company incorporated in Zurich, Switzerland. Chubb Limited, through its subsidiaries, provides a broad range of insurance and reinsurance products to insureds worldwide. Chubb operates through the following business segments: North America Commercial P&C Insurance, North America Personal P&C Insurance, North America Agricultural Insurance, Overseas General Insurance, Global Reinsurance, and Life Insurance. Refer to Note 9 for additional information.

The interim unaudited consolidated financial statements, which include the accounts of Chubb Limited and its subsidiaries (collectively, Chubb, we, us, or our), have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) and, in the opinion of management, reflect all adjustments (consisting of normally recurring accruals) necessary for a fair statement of the results and financial position for such periods. All significant intercompany accounts and transactions, including internal reinsurance transactions, have been eliminated.

The results of operations and cash flows for any interim period are not necessarily indicative of the results for the full year. These consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes included in our 2018 Form 10-K.

Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block]

Restricted cash

Restricted cash in the Consolidated balance sheets represents amounts held for the benefit of third parties and is legally or contractually restricted as to withdrawal or usage. Amounts include deposits with U.S. and non-U.S. regulatory authorities, trust funds set up for the benefit of ceding companies, and amounts pledged as collateral to meet financing arrangements.

The following table provides a reconciliation of cash and restricted cash reported within the Consolidated balance sheets that total to the amounts shown in the Consolidated statements of cash flows:

	March 31		December 31
(in millions of U.S. dollars)	2019		2018
Cash	$	1,271	$	1,247
Restricted cash	122		93
Total cash and restricted cash shown in the Consolidated statements of cash flows	$	1,393	$	1,340

Accounting guidance adopted in 2019

d) Accounting guidance adopted in 2019

Premium Amortization on Purchased Callable Debt Securities

Effective January 1, 2019, we adopted new accounting guidance on "Premium Amortization on Purchased Callable Debt Securities" for bonds held at a premium on a modified retrospective basis. The guidance requires the premium to be amortized to the earliest call date. As a result, we recorded a cumulative effect adjustment to decrease beginning retained earnings by $12 million after-tax ($15 million pre-tax). Securities held at a discount did not require an accounting change.

Lease Accounting

Effective for the quarter ended March 31, 2019, we adopted new lease accounting guidance and elected to utilize a modified retrospective approach which allowed us to initially apply the new lease standard at the adoption date and recognize a cumulative effect adjustment to the opening balance of retained earnings for 2019, with no adjustment to prior periods presented. The cumulative effect adjustment to the opening balance of retained earnings was zero. Our leases consist principally of real estate operating leases that are amortized on a straight-line basis over the term of the lease. The adoption of the updated guidance resulted in our recognizing a right-of-use asset of $608 million, which was recorded within Other assets, and a lease liability of $653 million, which was recorded within Accounts payable, accrued expenses, and other liabilities on the Consolidated balance sheet as well as de-recognizing the liability for deferred rent that was required under the previous guidance. The adoption of the new guidance did not have a material effect on our results of operations, financial condition or liquidity.

Accounting guidance not yet adopted

Refer to the2018 Form 10-K for information on accounting guidance not yet adopted.

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Fair value measurements Fair Value Measurement Policy (Policies)

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Fair Value Measurement, Policy [Policy Text Block]

Fair value of financial assets and financial liabilities is estimated based on the framework established in the fair value accounting guidance. The guidance defines fair value as the price to sell an asset or transfer a liability (an exit price) in an orderly transaction between market participants and establishes a three-level valuation hierarchy based on the reliability of the inputs. The fair value hierarchy gives the highest priority to quoted prices in active markets and the lowest priority to unobservable data.

The three levels of the hierarchy are as follows:

• Level 1 – Unadjusted quoted prices for identical assets or liabilities in active markets;

• Level 2 – Includes, among other items, inputs other than quoted prices that are observable for the asset or liability such as

interest rates and yield curves, quoted prices for similar assets and liabilities in active markets, and quoted prices for identical or similar assets and liabilities in markets that are not active; and

• Level 3 – Inputs that are unobservable and reflect management’s judgments about assumptions that market participants

would use in pricing an asset or liability.

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General General (Tables)

3 Months Ended

Mar. 31, 2019

Cash and Cash Equivalents [Abstract]

Schedule of Cash and Cash Equivalents [Table Text Block]

The following table provides a reconciliation of cash and restricted cash reported within the Consolidated balance sheets that total to the amounts shown in the Consolidated statements of cash flows:

	March 31		December 31
(in millions of U.S. dollars)	2019		2018
Cash	$	1,271	$	1,247
Restricted cash	122		93
Total cash and restricted cash shown in the Consolidated statements of cash flows	$	1,393	$	1,340

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Investments (Tables)

3 Months Ended

Mar. 31, 2019

Investments, Debt and Equity Securities [Abstract]

Schedule Of Amortized Cost And Fair Value Of HTM Fixed Maturities And Related OTTI Recognized In AOCI

March 31, 2019	Amortized Cost		Gross Unrealized Appreciation		Gross Unrealized Depreciation			Fair Value		OTTI Recognized in AOCI
(in millions of U.S. dollars)
Available for sale
U.S. Treasury and agency	$	3,760	$	50	$	(19	)	$	3,791	$	—
Foreign	21,796		658		(112		)	22,342		—
Corporate securities	27,519		476		(170		)	27,825		(5		)
Mortgage-backed securities	16,369		173		(112		)	16,430		(1		)
States, municipalities, and political subdivisions	10,180		123		(28		)	10,275		—
	$	79,624	$	1,480	$	(441	)	$	80,663	$	(6	)
Held to maturity
U.S. Treasury and agency	$	1,144	$	11	$	(3	)	$	1,152	$	—
Foreign	1,503		34		(3		)	1,534		—
Corporate securities	2,543		30		(34		)	2,539		—
Mortgage-backed securities	2,484		16		(6		)	2,494		—
States, municipalities, and political subdivisions	5,462		67		(8		)	5,521		—
	$	13,136	$	158	$	(54	)	$	13,240	$	—

December 31, 2018	Amortized Cost		Gross Unrealized Appreciation		Gross Unrealized Depreciation			Fair Value		OTTI Recognized in AOCI
(in millions of U.S. dollars)
Available for sale
U.S. Treasury and agency	$	4,158	$	30	$	(43	)	$	4,145	$	—
Foreign	21,370		395		(349		)	21,416		—
Corporate securities	27,183		150		(750		)	26,583		(6		)
Mortgage-backed securities	15,758		66		(284		)	15,540		(1		)
States, municipalities, and political subdivisions	10,854		49		(117		)	10,786		—
	$	79,323	$	690	$	(1,543	)	$	78,470	$	(7	)
Held to maturity
U.S. Treasury and agency	$	1,185	$	8	$	(11	)	$	1,182	$	—
Foreign	1,549		11		(18		)	1,542		—
Corporate securities	2,601		11		(104		)	2,508		—
Mortgage-backed securities	2,524		5		(43		)	2,486		—
States, municipalities, and political subdivisions	5,576		16		(51		)	5,541		—
	$	13,435	$	51	$	(227	)	$	13,259	$	—

Schedule Of Amortized Cost and Fair Value of Available-for-sale Securities and Related OTTI Recognized in AOCI

March 31, 2019	Amortized Cost		Gross Unrealized Appreciation		Gross Unrealized Depreciation			Fair Value		OTTI Recognized in AOCI
(in millions of U.S. dollars)
Available for sale
U.S. Treasury and agency	$	3,760	$	50	$	(19	)	$	3,791	$	—
Foreign	21,796		658		(112		)	22,342		—
Corporate securities	27,519		476		(170		)	27,825		(5		)
Mortgage-backed securities	16,369		173		(112		)	16,430		(1		)
States, municipalities, and political subdivisions	10,180		123		(28		)	10,275		—
	$	79,624	$	1,480	$	(441	)	$	80,663	$	(6	)
Held to maturity
U.S. Treasury and agency	$	1,144	$	11	$	(3	)	$	1,152	$	—
Foreign	1,503		34		(3		)	1,534		—
Corporate securities	2,543		30		(34		)	2,539		—
Mortgage-backed securities	2,484		16		(6		)	2,494		—
States, municipalities, and political subdivisions	5,462		67		(8		)	5,521		—
	$	13,136	$	158	$	(54	)	$	13,240	$	—

December 31, 2018	Amortized Cost		Gross Unrealized Appreciation		Gross Unrealized Depreciation			Fair Value		OTTI Recognized in AOCI
(in millions of U.S. dollars)
Available for sale
U.S. Treasury and agency	$	4,158	$	30	$	(43	)	$	4,145	$	—
Foreign	21,370		395		(349		)	21,416		—
Corporate securities	27,183		150		(750		)	26,583		(6		)
Mortgage-backed securities	15,758		66		(284		)	15,540		(1		)
States, municipalities, and political subdivisions	10,854		49		(117		)	10,786		—
	$	79,323	$	690	$	(1,543	)	$	78,470	$	(7	)
Held to maturity
U.S. Treasury and agency	$	1,185	$	8	$	(11	)	$	1,182	$	—
Foreign	1,549		11		(18		)	1,542		—
Corporate securities	2,601		11		(104		)	2,508		—
Mortgage-backed securities	2,524		5		(43		)	2,486		—
States, municipalities, and political subdivisions	5,576		16		(51		)	5,541		—
	$	13,435	$	51	$	(227	)	$	13,259	$	—

Schedule Of Fixed Maturities By Contractual Maturity

The following table presents fixed maturities by contractual maturity:

			March 31				December 31
			2019				2018
(in millions of U.S. dollars)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Available for sale
Due in 1 year or less	$	3,776	$	3,785	$	3,569	$	3,568
Due after 1 year through 5 years	27,308		27,593		27,134		27,005
Due after 5 years through 10 years	23,367		23,690		24,095		23,543
Due after 10 years	8,804		9,165		8,767		8,814
	63,255		64,233		63,565		62,930
Mortgage-backed securities	16,369		16,430		15,758		15,540
	$	79,624	$	80,663	$	79,323	$	78,470
Held to maturity
Due in 1 year or less	$	614	$	616	$	536	$	537
Due after 1 year through 5 years	3,111		3,125		3,122		3,106
Due after 5 years through 10 years	4,246		4,287		4,468		4,407
Due after 10 years	2,681		2,718		2,785		2,723
	10,652		10,746		10,911		10,773
Mortgage-backed securities	2,484		2,494		2,524		2,486
	$	13,136	$	13,240	$	13,435	$	13,259

Schedule of Realized Gain (Loss)

The following table presents the components of Net realized gains (losses):

	Three Months Ended
	March 31
(in millions of U.S. dollars)	2019			2018
Fixed maturities:
OTTI on fixed maturities, gross and net	$	(13	)	$	(1	)
Gross realized gains excluding OTTI	27			66
Gross realized losses excluding OTTI	(58		)	(88		)
Total fixed maturities	(44		)	(23		)
Equity securities:
Gross realized gains excluding OTTI	64			10
Gross realized losses excluding OTTI	(6		)	(21		)
Total equity securities	58			(11		)
Other investments	(44		)	29
Foreign exchange gains (losses)	13			(77		)
Investment and embedded derivative instruments	(130		)	17
Fair value adjustments on insurance derivative	114			38
S&P futures	(63		)	22
Other derivative instruments	(1		)	2
Other	—			1
Net realized gains (losses) (pre-tax)	$	(97	)	$	(2	)

Schedule Of Roll-Forward Of Pre-Tax Credit Losses Related To Fixed Maturities For Which A Portion Of OTTI Was Recognized In OCI

The following table presents a roll-forward of pre-tax credit losses related to fixed maturities for which a portion of OTTI was recognized in OCI:

	Three Months Ended
	March 31
(in millions of U.S. dollars)	2019			2018
Balance of credit losses related to securities still held – beginning of period	$	34		$	22
Additions where no OTTI was previously recorded	6			—
Reductions for securities sold during the period	(8		)	(7		)
Balance of credit losses related to securities still held – end of period	$	32		$	15

Gain (Loss) on Securities [Table Text Block]

equity securities and other investments, including both sales of securities and unrealized gains and losses from changes in fair value:

									Three Months Ended
									March 31
	2019								2018
(in millions of U.S. dollars)	Equity Securities		Other Investments			Total			Equity Securities			Other Investments		Total
Net gains (losses) recognized during the period	$	58	$	(44	)	$	14		$	(11	)	$	29	$	18
Less: Net gains (losses) recognized from sales of securities	1		(2		)	(1		)	10			—		10
Unrealized gains (losses) recognized for securities still held at reporting date	$	57	$	(42	)	$	15		$	(21	)	$	29	$	8

Schedule Of Aggregate Fair Value And Gross Unrealized Loss By Length Of Time The Security Has Continuously Been In An Unrealized Loss Position

The following tables present, for all securities in an unrealized loss position (including securities on loan), the aggregate fair value and gross unrealized loss by length of time the security has continuously been in an unrealized loss position:

	0 – 12 Months					Over 12 Months					Total
March 31, 2019	Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss
(in millions of U.S. dollars)
U.S. Treasury and agency	$	68	$	—		$	2,298	$	(22	)	$	2,366	$	(22	)
Foreign	1,346		(26		)	4,228		(89		)	5,574		(115		)
Corporate securities	3,649		(62		)	6,206		(142		)	9,855		(204		)
Mortgage-backed securities	388		(1		)	8,974		(117		)	9,362		(118		)
States, municipalities, and political subdivisions	93		—			4,867		(36		)	4,960		(36		)
Total fixed maturities	$	5,544	$	(89	)	$	26,573	$	(406	)	$	32,117	$	(495	)

	0 – 12 Months					Over 12 Months					Total
December 31, 2018	Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss
(in millions of U.S. dollars)
U.S. Treasury and agency	$	523	$	(4	)	$	2,859	$	(50	)	$	3,382	$	(54	)
Foreign	6,764		(208		)	5,349		(159		)	12,113		(367		)
Corporate securities	16,538		(599		)	4,873		(255		)	21,411		(854		)
Mortgage-backed securities	6,103		(98		)	6,913		(229		)	13,016		(327		)
States, municipalities, and political subdivisions	5,024		(44		)	7,768		(124		)	12,792		(168		)
Total fixed maturities	$	34,952	$	(953	)	$	27,762	$	(817	)	$	62,714	$	(1,770	)

Schedule Of Components Of Restricted Assets

The following table presents the components of restricted assets:

	March 31		December 31
(in millions of U.S. dollars)	2019		2018
Trust funds	$	13,943	$	13,988
Deposits with U.S. regulatory authorities	2,904		2,405
Deposits with non-U.S. regulatory authorities	2,851		2,531
Assets pledged under repurchase agreements	1,478		1,468
Other pledged assets	942		692
Total	$	22,118	$	21,084

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Fair value measurements (Tables)

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Financial Instruments Measured At Fair Value On A Recurring Basis

Financial instruments measured at fair value on a recurring basis, by valuation hierarchy

March 31, 2019	Level 1		Level 2		Level 3		Total
(in millions of U.S. dollars)
Assets:
Fixed maturities available for sale
U.S. Treasury and agency	$	3,168	$	623	$	—	$	3,791
Foreign	—		21,982		360		22,342
Corporate securities	—		26,483		1,342		27,825
Mortgage-backed securities	—		16,352		78		16,430
States, municipalities, and political subdivisions	—		10,275		—		10,275
	3,168		75,715		1,780		80,663
Equity securities	766		—		55		821
Short-term investments	1,785		1,293		—		3,078
Other investments (1)	411		342		11		764
Securities lending collateral	—		1,861		—		1,861
Investment derivative instruments	15		—		—		15
Other derivative instruments	7		—		—		7
Separate account assets	2,991		139		—		3,130
Total assets measured at fair value (1)	$	9,143	$	79,350	$	1,846	$	90,339
Liabilities:
Investment derivative instruments	$	52	$	195	$	—	$	247
Other derivative instruments	12		—		—		12
GLB (2)	—		—		338		338
Total liabilities measured at fair value	$	64	$	195	$	338	$	597

⁽¹⁾  Excluded from the table above are partially-owned investments, investment funds, and limited partnerships of $4,464 million and other investments of $91 million at March 31, 2019 measured using NAV as a practical expedient.

⁽²⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the Consolidated balance sheets.

December 31, 2018	Level 1		Level 2		Level 3		Total
(in millions of U.S. dollars)
Assets:
Fixed maturities available for sale
U.S. Treasury and agency	$	3,400	$	745	$	—	$	4,145
Foreign	—		21,071		345		21,416
Corporate securities	—		25,284		1,299		26,583
Mortgage-backed securities	—		15,479		61		15,540
States, municipalities, and political subdivisions	—		10,786		—		10,786
	3,400		73,365		1,705		78,470
Equity securities	713		—		57		770
Short-term investments	1,575		1,440		1		3,016
Other investments (1)	381		303		11		695
Securities lending collateral	—		1,926		—		1,926
Investment derivative instruments	28		—		—		28
Other derivative instruments	25		—		—		25
Separate account assets	2,686		137		—		2,823
Total assets measured at fair value (1)	$	8,808	$	77,171	$	1,774	$	87,753
Liabilities:
Investment derivative instruments	$	38	$	115	$	—	$	153
GLB (2)	—		—		452		452
Total liabilities measured at fair value	$	38	$	115	$	452	$	605

⁽¹⁾  Excluded from the table above are partially-owned investments, investment funds, and limited partnerships of $4,244 million and other investments of $95 million at December 31, 2018 measured using NAV as a practical expedient.

⁽²⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the Consolidated balance sheets.

Fair Value And Maximum Future Funding Commitments Related To Investments

The following table presents, by investment category, the expected liquidation period, fair value, and maximum future funding commitments of alternative investments:

				March 31				December 31
	Expected Liquidation Period of Underlying Assets			2019				2018
(in millions of U.S. dollars)		Fair Value		Maximum Future Funding Commitments		Fair Value		Maximum Future Funding Commitments
Financial	2 to 9 Years	$	591	$	188	$	596	$	193
Real Assets	2 to 11 Years	762		449		704		362
Distressed	2 to 7 Years	263		98		296		105
Private Credit	3 to 8 Years	134		291		147		310
Traditional	2 to 14 Years	2,331		2,573		2,362		2,735
Vintage	1 to 2 Years	125		43		56		—
Investment funds	Not Applicable	258		—		83		—
		$	4,464	$	3,642	$	4,244	$	3,705

Schedule Of Significant Unobservable Inputs Used In Level 3 Liability Valuations

The following table presents the significant unobservable inputs used in the Level 3 liability valuations. Excluded from the table below are inputs used to determine the fair value of Level 3 assets which are based on single broker quotes and contain no quantitative unobservable inputs developed by management. The majority of our fixed maturities classified as Level 3 used external pricing when markets are less liquid due to the lack of market inputs (i.e., stale pricing, broker quotes).

(in millions of U.S. dollars, except for percentages)	Fair Value				Valuation Technique	Significant Unobservable Inputs	Ranges
	March 31, 2019		December 31, 2018
GLB (1)	$	338	$	452	Actuarial model	Lapse rate	3% – 32%
						Annuitization rate	0% – 42%

⁽¹⁾  Discussion of the most significant inputs used in the fair value measurement of GLB and the sensitivity of those assumptions is included within Note 3 a) Guaranteed living benefits.

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

The following tables present a reconciliation of the beginning and ending balances of financial instruments measured at fair value using significant unobservable inputs (Level 3):

	Assets																	Liabilities
Three Months Ended	Available-for-Sale Debt Securities									Equity securities			Short-term investments			Other investments			GLB (1)
March 31, 2019	Foreign			Corporate securities			MBS
(in millions of U.S. dollars)
Balance – beginning of period	$	345		$	1,299		$	61		$	57		$	1		$	11		$	452
Transfers into Level 3	3			5			—			—			—			—			—
Transfers out of Level 3	(15		)	—			—			—			—			—			—
Change in Net Unrealized Gains (Losses) included in OCI, including foreign exchange	6			4			—			1			—			—			—
Net Realized Gains/Losses	(1		)	1			—			(2		)	—			—			(114		)
Purchases	53			128			18			9			—			—			—
Sales	(5		)	(37		)	—			(10		)	—			—			—
Settlements	(26		)	(58		)	(1		)	—			(1		)	—			—
Balance – end of period	$	360		$	1,342		$	78		$	55		$	—		$	11		$	338
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date	$	—		$	—		$	—		$	(1	)	$	—		$	—		$	(114	)

⁽¹⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the Consolidated balance sheets. The liability for GLB reinsurance was $741 million at March 31, 2019, and $861 million at December 31, 2018, which includes a fair value derivative adjustment of $338 million and 452 million, respectively.

	Assets																		Liabilities
Three Months Ended	Available-for-Sale Debt Securities								Equity securities		Short-term investments			Other investments			Other derivative instruments		GLB (2)
March 31, 2018	Foreign			Corporate securities (1)			MBS
(in millions of U.S. dollars)
Balance – beginning of period	$	93		$	1,037		$	78	$	44	$	—		$	263		$	2	$	204
Transfers into Level 3	7			—			1		—		5			—			—		—
Transfers out of Level 3	—			(10		)	—		—		—			—			—		—
Change in Net Unrealized Gains (Losses) included in OCI, including foreign exchange	9			(3		)	—		1		—			2			—		—
Net Realized Gains/Losses	—			—			—		2		—			—			—		(37		)
Purchases	87			139			4		17		8			14			—		—
Sales	(19		)	(51		)	—		—		—			—			—		—
Settlements	(1		)	(39		)	—		—		(1		)	(9		)	—		—
Balance – end of period	$	176		$	1,073		$	83	$	64	$	12		$	270		$	2	$	167
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date	$	—		$	—		$	—	$	—	$	—		$	—		$	—	$	(37	)

⁽¹⁾  Purchases in Level 3 primarily consist of privately-placed fixed income securities.

⁽²⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the Consolidated balance sheets. The liability for GLB reinsurance was $529 million at March 31, 2018, and $550 million at December 31, 2017, which includes a fair value derivative adjustment of $167 million and $204 million, respectively.

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

The following tables present a reconciliation of the beginning and ending balances of financial instruments measured at fair value using significant unobservable inputs (Level 3):

	Assets																	Liabilities
Three Months Ended	Available-for-Sale Debt Securities									Equity securities			Short-term investments			Other investments			GLB (1)
March 31, 2019	Foreign			Corporate securities			MBS
(in millions of U.S. dollars)
Balance – beginning of period	$	345		$	1,299		$	61		$	57		$	1		$	11		$	452
Transfers into Level 3	3			5			—			—			—			—			—
Transfers out of Level 3	(15		)	—			—			—			—			—			—
Change in Net Unrealized Gains (Losses) included in OCI, including foreign exchange	6			4			—			1			—			—			—
Net Realized Gains/Losses	(1		)	1			—			(2		)	—			—			(114		)
Purchases	53			128			18			9			—			—			—
Sales	(5		)	(37		)	—			(10		)	—			—			—
Settlements	(26		)	(58		)	(1		)	—			(1		)	—			—
Balance – end of period	$	360		$	1,342		$	78		$	55		$	—		$	11		$	338
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date	$	—		$	—		$	—		$	(1	)	$	—		$	—		$	(114	)

⁽¹⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the Consolidated balance sheets. The liability for GLB reinsurance was $741 million at March 31, 2019, and $861 million at December 31, 2018, which includes a fair value derivative adjustment of $338 million and 452 million, respectively.

	Assets																		Liabilities
Three Months Ended	Available-for-Sale Debt Securities								Equity securities		Short-term investments			Other investments			Other derivative instruments		GLB (2)
March 31, 2018	Foreign			Corporate securities (1)			MBS
(in millions of U.S. dollars)
Balance – beginning of period	$	93		$	1,037		$	78	$	44	$	—		$	263		$	2	$	204
Transfers into Level 3	7			—			1		—		5			—			—		—
Transfers out of Level 3	—			(10		)	—		—		—			—			—		—
Change in Net Unrealized Gains (Losses) included in OCI, including foreign exchange	9			(3		)	—		1		—			2			—		—
Net Realized Gains/Losses	—			—			—		2		—			—			—		(37		)
Purchases	87			139			4		17		8			14			—		—
Sales	(19		)	(51		)	—		—		—			—			—		—
Settlements	(1		)	(39		)	—		—		(1		)	(9		)	—		—
Balance – end of period	$	176		$	1,073		$	83	$	64	$	12		$	270		$	2	$	167
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date	$	—		$	—		$	—	$	—	$	—		$	—		$	—	$	(37	)

⁽¹⁾  Purchases in Level 3 primarily consist of privately-placed fixed income securities.

⁽²⁾  Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the Consolidated balance sheets. The liability for GLB reinsurance was $529 million at March 31, 2018, and $550 million at December 31, 2017, which includes a fair value derivative adjustment of $167 million and $204 million, respectively.

Carrying Values And Fair Values Of Financial Instruments Not Measured At Fair Value

The following tables present fair value, by valuation hierarchy, and carrying value of the financial instruments not measured at fair value:

March 31, 2019	Fair Value								Carrying Value
(in millions of U.S. dollars)	Level 1		Level 2		Level 3		Total
Assets:
Fixed maturities held to maturity
U.S. Treasury and agency	$	1,098	$	54	$	—	$	1,152	$	1,144
Foreign	—		1,534		—		1,534		1,503
Corporate securities	—		2,509		30		2,539		2,543
Mortgage-backed securities	—		2,494		—		2,494		2,484
States, municipalities, and political subdivisions	—		5,521		—		5,521		5,462
Total assets	$	1,098	$	12,112	$	30	$	13,240	$	13,136
Liabilities:
Repurchase agreements	$	—	$	1,419	$	—	$	1,419	$	1,419
Short-term debt	—		512		—		512		509
Long-term debt	—		12,719		—		12,719		12,071
Trust preferred securities	—		425		—		425		308
Total liabilities	$	—	$	15,075	$	—	$	15,075	$	14,307

December 31, 2018	Fair Value								Carrying Value
(in millions of U.S. dollars)	Level 1		Level 2		Level 3		Total
Assets:
Fixed maturities held to maturity
U.S. Treasury and agency	$	1,128	$	54	$	—	$	1,182	$	1,185
Foreign	—		1,542		—		1,542		1,549
Corporate securities	—		2,477		31		2,508		2,601
Mortgage-backed securities	—		2,486		—		2,486		2,524
States, municipalities, and political subdivisions	—		5,541		—		5,541		5,576
Total assets	$	1,128	$	12,100	$	31	$	13,259	$	13,435
Liabilities:
Repurchase agreements	$	—	$	1,418	$	—	$	1,418	$	1,418
Short-term debt	—		516		—		516		509
Long-term debt	—		12,181		—		12,181		12,087
Trust preferred securities	—		409		—		409		308
Total liabilities	$	—	$	14,524	$	—	$	14,524	$	14,322

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Unpaid losses and loss expenses Unpaid losses and loss expenses (Tables) - USD ($)
$ in Millions

3 Months Ended

Mar. 31, 2019

Mar. 31, 2018

Liability for Claims and Claims Adjustment Expense [Abstract]

Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block]

The following table presents a reconciliation of beginning and ending Unpaid losses and loss expenses:

	Three Months Ended March 31
(in millions of U.S. dollars)	2019			2018
Gross unpaid losses and loss expenses – beginning of period	$	62,960		$	63,179
Reinsurance recoverable on unpaid losses - beginning of period (1)	(14,689		)	(14,014		)
Net unpaid losses and loss expenses – beginning of period	48,271			49,165
Net losses and loss expenses incurred in respect of losses occurring in:
Current year	4,326			4,358
Prior years (2)	(228		)	(256		)
Total	4,098			4,102
Net losses and loss expenses paid in respect of losses occurring in:
Current year	785			809
Prior years	3,234			3,433
Total	4,019			4,242
Foreign currency revaluation and other	86			292
Net unpaid losses and loss expenses – end of period	48,436			49,317
Reinsurance recoverable on unpaid losses (1)	14,707			13,822
Gross unpaid losses and loss expenses – end of period	$	63,143		$	63,139

⁽¹⁾  Net of provision for uncollectible reinsurance.

⁽²⁾  Relates to prior period loss reserve development only and excludes prior period development related to reinstatement premiums, expense adjustments and earned premiums totaling $24 million and $47 million for the three months ended March 31, 2019 and 2018, respectively.

Prior Period Development, by Segment [Table Text Block]

	Three Months Ended March 31
(in millions of U.S. dollars)	Long-tail			Short-tail			Total
2019
North America Commercial P&C Insurance	$	(65	)	$	(66	)	$	(131	)
North America Personal P&C Insurance	—			(10		)	(10		)
North America Agricultural Insurance	—			(61		)	(61		)
Overseas General Insurance	—			(4		)	(4		)
Global Reinsurance	(1		)	(7		)	(8		)
Corporate	10			—			10
Total	$	(56	)	$	(148	)	$	(204	)
2018
North America Commercial P&C Insurance	$	8		$	(109	)	$	(101	)
North America Personal P&C Insurance	—			(6		)	(6		)
North America Agricultural Insurance	—			(76		)	(76		)
Overseas General Insurance	—			(22		)	(22		)
Global Reinsurance	—			(14		)	(14		)
Corporate	10			—			10
Total	$	18		$	(227	)	$	(209	)

Prior Year Claims and Claims Adjustment Expense

^[1]

$ (228)

$ (256)

[1] Relates to prior period loss reserve development only and excludes prior period development related to reinstatement premiums, expense adjustments and earned premiums totaling $24 million and $47 million for the three months ended March 31, 2019 and 2018, respectively.

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Commitments, contingencies, and guarantees (Tables)

3 Months Ended

Mar. 31, 2019

Commitments and Contingencies Disclosure [Abstract]

Balance Sheet Locations, Fair Values In An Asset Or (Liability) Position, And Notional Values/Payment Provisions Of Derivative Instruments

The following table presents the balance sheet locations, fair values of derivative instruments in an asset or (liability) position, and notional values/payment provisions of our derivative instruments:

				March 31, 2019							December 31, 2018
	Consolidated Balance Sheet Location	Fair Value					Notional Value/ Payment Provision		Fair Value					Notional Value/ Payment Provision
(in millions of U.S. dollars)		Derivative Asset		Derivative (Liability)					Derivative Asset		Derivative (Liability)
Investment and embedded derivative instruments:
Foreign currency forward contracts	OA / (AP)	$	9	$	(28	)	$	2,559	$	15	$	(19	)	$	2,185
Cross-currency swaps	OA / (AP)	—		—			45		—		—			45
Interest rate swaps	OA / (AP)	—		(195		)	5,250		—		(115		)	5,250
Options/Futures contracts on notes, bonds, and equities	OA / (AP)	6		(24		)	1,080		13		(19		)	1,046
Convertible securities (1)	FM AFS / ES	8		—			9		9		—			11
TBAs	FM AFS	—		—			—		6		—			6
		$	23	$	(247	)	$	8,943	$	43	$	(153	)	$	8,543
Other derivative instruments:
Futures contracts on equities(2)	OA / (AP)	$	—	$	(12	)	$	537	$	23	$	—		$	507
Other	OA / (AP)	7		—			184		2		—			74
		$	7	$	(12	)	$	721	$	25	$	—		$	581
GLB (3)	(AP) / (FPB)	$	—	$	(741	)	$	1,458	$	—	$	(861	)	$	1,750

⁽¹⁾  Includes fair value of embedded derivatives.

⁽²⁾  Related to GMDB and GLB blocks of business.

⁽³⁾  Includes both future policy benefits reserves and fair value derivative adjustment. Note that the payment provision related to GLB is the net amount at risk. The concept of a notional value does not apply to the GLB reinsurance contracts.

Net Realized Gains (Losses) Of Derivative Instrument Activity In Consolidated Statement Of Operations

The following table presents net realized gains (losses) related to derivative instrument activity in the Consolidated statements of operations:

	Three Months Ended
	March 31
(in millions of U.S. dollars)	2019			2018
Investment and embedded derivative instruments:
Foreign currency forward contracts	$	(15	)	$	4
Interest rate swaps	(80		)	—
All other futures contracts, options, and equities	(36		)	13
Convertible securities (1)	1			—
Total investment and embedded derivative instruments	$	(130	)	$	17
GLB and other derivative instruments:
GLB (2)	$	114		$	38
Futures contracts on equities (3)	(63		)	22
Other	(1		)	2
Total GLB and other derivative instruments	$	50		$	62
	$	(80	)	$	79

⁽¹⁾  Includes embedded derivatives.

⁽²⁾  Excludes foreign exchange gains (losses) related to GLB.

⁽³⁾  Related to GMDB and GLB blocks of business.

Transfer of Certain Financial Assets Accounted for as Secured Borrowings

The following table presents the carrying value of collateral pledged under repurchase agreements by investment category and remaining contractual maturity of the underlying agreements:

	Remaining contractual maturity
	March 31, 2019						December 31, 2018
	Up to 30 Days		Greater than 90 Days		Total		30-90 Days		Greater than 90 Days		Total
(in millions of U.S. dollars)
Collateral pledged under repurchase agreements:
U.S. Treasury and agency	$	255	$	9	$	264	$	—	$	259	$	259
Mortgage-backed securities	330		884		1,214		496		713		1,209
	$	585	$	893	$	1,478	$	496	$	972	$	1,468
Gross amount of recognized liabilities for repurchase agreements					$	1,419					$	1,418
Difference (1)					$	59					$	50

⁽¹⁾  Per the repurchase agreements, the amount of collateral posted is required to exceed the amount of gross liability.

The following table presents the carrying value of collateral held under securities lending agreements by investment category and remaining contractual maturity of the underlying agreements:

	Remaining contractual maturity
	March 31		December 31
	2019		2018
(in millions of U.S. dollars)	Overnight and Continuous
Collateral held under securities lending agreements:
Cash	$	846	$	756
U.S. Treasury and agency	60		64
Foreign	655		795
Corporate securities	29		15
Mortgage-backed securities	47		45
Equity securities	224		251
	$	1,861	$	1,926
Gross amount of recognized liability for securities lending payable	$	1,861	$	1,926

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Shareholders' Equity (Tables)

3 Months Ended

Mar. 31, 2019

Stockholders' Equity Note [Abstract]

Share Repurchase Program [Table Text Block]

The following table presents repurchases of Chubb's Common Shares conducted in a series of open market transactions under the Board authorizations:

	Three Months Ended March 31				April 1, 2019 through May 1, 2019
(in millions of U.S. dollars, except share data)	2019		2018
Number of shares repurchased	2,753,754		—		550,000
Cost of shares repurchased	$	367	$	—	$	77
Repurchase authorization remaining at end of period	$	1,112	$	1,000	$	1,035

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Postretirement benefits (Tables)

3 Months Ended

Mar. 31, 2019

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

The components of net pension and other postretirement benefit costs (benefits) reflected in Net income in the Consolidated statements of operations were as follows:

	Pension Benefit Plans												Other Postretirement Benefit Plans
	2019						2018						2019			2018
Three Months Ended March 31	U.S. Plans			Non-U.S. Plans			U.S. Plans			Non-U.S. Plans
(in millions of U.S. dollars)
Service cost	$	12		$	3		$	14		$	3		$	—		$	—
Non-service cost:
Interest cost	30			7			26			7			1			1
Expected return on plan assets	(47		)	(11		)	(53		)	(13		)	(1		)	(1		)
Amortization of prior service cost	—			—			—			—			(20		)	(21		)
Total non-service (benefit) cost	(17		)	(4		)	(27		)	(6		)	(20		)	(21		)
Net periodic (benefit) cost	$	(5	)	$	(1	)	$	(13	)	$	(3	)	$	(20	)	$	(21	)

The service and non-service cost components of net periodic (benefit) cost reflected in the Consolidated statements of operations were as follows:

	Pension Benefit Plans						Other Postretirement Benefit Plans
Three Months Ended March 31	2019			2018			2019			2018
(in millions of U.S. dollars)
Service Cost:
Losses and loss expenses	$	2		$	2		$	—		$	—
Administrative expenses	13			15			—			—
Total service cost	15			17			—			—
Non-service Cost:
Losses and loss expenses	(2		)	(3		)	(2		)	(1		)
Administrative expenses	(19		)	(30		)	(18		)	(20		)
Total non-service (benefit) cost	(21		)	(33		)	(20		)	(21		)
Net periodic (benefit) cost	$	(6	)	$	(16	)	$	(20	)	$	(21	)

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Segment information (Tables)

3 Months Ended

Mar. 31, 2019

Segment Reporting [Abstract]

Operations By Segment

The following tables present the Statement of Operations by segment:

For the Three Months Ended March 31, 2019 (in millions of U.S. dollars)	North America Commercial P&C Insurance			North America Personal P&C Insurance		North America Agricultural Insurance			Overseas General Insurance		Global Reinsurance			Life Insurance			Corporate			Chubb Consolidated
Net premiums written	$	2,951		$	1,056	$	130		$	2,395	$	202		$	579		$	—		$	7,313
Net premiums earned	3,085			1,154		55			2,114		168			561			—			7,137
Losses and loss expenses	1,973			757		(27		)	1,106		76			202			11			4,098
Policy benefits	—			—		—			—		—			196			—			196
Policy acquisition costs	459			231		7			596		43			128			—			1,464
Administrative expenses	240			68		1			249		10			79			63			710
Underwriting income (loss)	413			98		74			163		39			(44		)	(74		)	669
Net investment income (loss)	510			64		10			144		56			89			(37		)	836
Other (income) expense	(5		)	—		—			4		(9		)	(40		)	11			(39		)
Amortization expense of purchased intangibles	—			3		7			11		—			—			55			76
Segment income (loss)	$	928		$	159	$	77		$	292	$	104		$	85		$	(177	)	$	1,468
Net realized gains (losses) including OTTI																	(97		)	(97		)
Interest expense																	140			140
Chubb integration expenses																	3			3
Income tax expense																	188			188
Net income (loss)																	$	(605	)	$	1,040

For the Three Months Ended March 31, 2018 (in millions of U.S. dollars)	North America Commercial P&C Insurance			North America Personal P&C Insurance			North America Agricultural Insurance			Overseas General Insurance		Global Reinsurance			Life Insurance			Corporate			Chubb Consolidated
Net premiums written	$	2,812		$	1,048		$	108		$	2,384	$	193		$	559		$	—		$	7,104
Net premiums earned	3,029			1,140			43			2,107		168			540			—			7,027
Losses and loss expenses	1,908			886			(53		)	1,078		67			205			11			4,102
Policy benefits	—			—			—			—		—			151			—			151
Policy acquisition costs	472			237			(1		)	588		40			128			—			1,464
Administrative expenses	231			65			(3		)	239		10			78			72			692
Underwriting income (loss)	418			(48		)	100			202		51			(22		)	(83		)	618
Net investment income (loss)	503			59			7			151		64			83			(61		)	806
Other (income) expense	(6		)	—			—			7		(7		)	(4		)	(37		)	(47		)
Amortization expense of purchased intangibles	—			3			7			10		—			1			64			85
Segment income (loss)	$	927		$	8		$	100		$	336	$	122		$	64		$	(171	)	$	1,386
Net realized gains (losses) including OTTI																		(2		)	(2		)
Interest expense																		157			157
Chubb integration expenses																		10			10
Income tax expense																		135			135
Net income (loss)																		$	(475	)	$	1,082

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Earnings per share (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Schedule Of Earnings Per Share, Basic And Diluted

	Three Months Ended
	March 31
(in millions of U.S. dollars, except share and per share data)	2019		2018
Numerator:
Net income	$	1,040	$	1,082
Denominator:
Denominator for basic earnings per share:
Weighted-average shares outstanding	458,805,185		465,703,240
Denominator for diluted earnings per share:
Share-based compensation plans	2,731,755		3,770,351
Weighted-average shares outstanding and assumed conversions	461,536,940		469,473,591
Basic earnings per share	$	2.27	$	2.32
Diluted earnings per share	$	2.25	$	2.30
Potential anti-dilutive share conversions	4,343,204		2,116,188

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Information provided in connection with outstanding debt of subsidiaries (Tables)

3 Months Ended

Mar. 31, 2019

Table Text Block Supplement [Abstract]

Condensed Consolidating Balance Sheet

Condensed Consolidating Balance Sheet at March 31, 2019

(in millions of U.S. dollars)	Chubb Limited (Parent Guarantor)		Chubb INA Holdings Inc. (Subsidiary Issuer)		Other Chubb Limited Subsidiaries		Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
Assets
Investments	$	—	$	229	$	103,031	$	—		$	103,260
Cash (1)	2		71		2,220		(1,022		)	1,271
Restricted cash	—		—		122		—			122
Insurance and reinsurance balances receivable	—		—		11,491		(1,665		)	9,826
Reinsurance recoverable on losses and loss expenses	—		—		26,232		(10,095		)	16,137
Reinsurance recoverable on policy benefits	—		—		306		(103		)	203
Value of business acquired	—		—		289		—			289
Goodwill and other intangible assets	—		—		21,419		—			21,419
Investments in subsidiaries	45,648		51,996		—		(97,644		)	—
Due from subsidiaries and affiliates, net	7,358		—		616		(7,974		)	—
Other assets	9		488		20,170		(1,847		)	18,820
Total assets	$	53,017	$	52,784	$	185,896	$	(120,350	)	$	171,347
Liabilities
Unpaid losses and loss expenses	$	—	$	—	$	72,998	$	(9,855	)	$	63,143
Unearned premiums	—		—		17,039		(1,130		)	15,909
Future policy benefits	—		—		5,655		(103		)	5,552
Due to subsidiaries and affiliates, net	—		7,974		—		(7,974		)	—
Affiliated notional cash pooling programs (1)	331		691		—		(1,022		)	—
Repurchase agreements	—		—		1,419		—			1,419
Short-term debt	—		500		9		—			509
Long-term debt	—		12,070		1		—			12,071
Trust preferred securities	—		308		—		—			308
Other liabilities	331		1,894		20,478		(2,622		)	20,081
Total liabilities	662		23,437		117,599		(22,706		)	118,992
Total shareholders’ equity	52,355		29,347		68,297		(97,644		)	52,355
Total liabilities and shareholders’ equity	$	53,017	$	52,784	$	185,896	$	(120,350	)	$	171,347

⁽¹⁾  Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Various Chubb entities participate in one or the other of the Pools, pursuant to which credit and debit balances in individual Chubb accounts are translated daily into a single currency and pooled on a notional basis. Individual Chubb entities are permitted to overdraw on their individual accounts provided the overall Pool balances do not fall below zero. At March 31, 2019, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

Condensed Consolidating Balance Sheet at December 31, 2018

(in millions of U.S. dollars)	Chubb Limited (Parent Guarantor)		Chubb INA Holdings Inc. (Subsidiary Issuer)		Other Chubb Limited Subsidiaries		Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
Assets
Investments	$	—	$	214	$	100,754	$	—		$	100,968
Cash (1)	1		2		1,896		(652		)	1,247
Restricted cash	—		—		93		—			93
Insurance and reinsurance balances receivable	—		—		11,861		(1,786		)	10,075
Reinsurance recoverable on losses and loss expenses	—		—		26,422		(10,429		)	15,993
Reinsurance recoverable on policy benefits	—		—		306		(104		)	202
Value of business acquired	—		—		295		—			295
Goodwill and other intangible assets	—		—		21,414		—			21,414
Investments in subsidiaries	43,531		50,209		—		(93,740		)	—
Due from subsidiaries and affiliates, net	7,074		—		598		(7,672		)	—
Other assets	3		1,007		18,102		(1,628		)	17,484
Total assets	$	50,609	$	51,432	$	181,741	$	(116,011	)	$	167,771
Liabilities
Unpaid losses and loss expenses	$	—	$	—	$	72,857	$	(9,897	)	$	62,960
Unearned premiums	—		—		16,611		(1,079		)	15,532
Future policy benefits	—		—		5,610		(104		)	5,506
Due to subsidiaries and affiliates, net	—		7,672		—		(7,672		)	—
Affiliated notional cash pooling programs (1)	35		617		—		(652		)	—
Repurchase agreements	—		—		1,418		—			1,418
Short-term debt	—		500		9		—			509
Long-term debt	—		12,086		1		—			12,087
Trust preferred securities	—		308		—		—			308
Other liabilities	262		2,545		19,199		(2,867		)	19,139
Total liabilities	297		23,728		115,705		(22,271		)	117,459
Total shareholders’ equity	50,312		27,704		66,036		(93,740		)	50,312
Total liabilities and shareholders’ equity	$	50,609	$	51,432	$	181,741	$	(116,011	)	$	167,771

⁽¹⁾  Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Various Chubb entities participate in one or the other of the Pools, pursuant to which credit and debit balances in individual Chubb accounts are translated daily into a single currency and pooled on a notional basis. Individual Chubb entities are permitted to overdraw on their individual accounts provided the overall Pool balances do not fall below zero. At December 31, 2018, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

Condensed Consolidating Statement Of Operations and Comprehensive Income

Condensed Consolidating Statements of Operations and Comprehensive Income

For the Three Months Ended March 31, 2019	Chubb Limited (Parent Guarantor)			Chubb INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net premiums written	$	—		$	—		$	7,313		$	—		$	7,313
Net premiums earned	—			—			7,137			—			7,137
Net investment income	1			(4		)	839			—			836
Equity in earnings of subsidiaries	990			759			—			(1,749		)	—
Net realized gains (losses) including OTTI	1			(13		)	(85		)	—			(97		)
Losses and loss expenses	—			—			4,098			—			4,098
Policy benefits	—			—			196			—			196
Policy acquisition costs and administrative expenses	20			(15		)	2,169			—			2,174
Interest (income) expense	(66		)	185			21			—			140
Other (income) expense	(6		)	3			(36		)	—			(39		)
Amortization of purchased intangibles	—			—			76			—			76
Chubb integration expenses	—			2			1			—			3
Income tax expense (benefit)	4			(42		)	226			—			188
Net income	$	1,040		$	609		$	1,140		$	(1,749	)	$	1,040
Comprehensive income	$	2,718		$	1,941		$	2,788		$	(4,729	)	$	2,718

Condensed Consolidating Statements of Operations and Comprehensive Income

For the Three Months Ended March 31, 2018	Chubb Limited (Parent Guarantor)			Chubb INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net premiums written	$	—		$	—		$	7,104		$	—		$	7,104
Net premiums earned	—			—			7,027			—			7,027
Net investment income	2			4			800			—			806
Equity in earnings of subsidiaries	1,022			885			—			(1,907		)	—
Net realized gains (losses) including OTTI	(2		)	(24		)	24			—			(2		)
Losses and loss expenses	—			—			4,102			—			4,102
Policy benefits	—			—			151			—			151
Policy acquisition costs and administrative expenses	18			22			2,116			—			2,156
Interest (income) expense	(80		)	209			28			—			157
Other (income) expense	(5		)	8			(50		)	—			(47		)
Amortization of purchased intangibles	—			—			85			—			85
Chubb integration expenses	2			1			7			—			10
Income tax expense (benefit)	5			(59		)	189			—			135
Net income	$	1,082		$	684		$	1,223		$	(1,907	)	$	1,082
Comprehensive income	$	453		$	216		$	614		$	(830	)	$	453

Condensed Consolidating Statement of Cash Flows

Condensed Consolidating Statement of Cash Flows

For the Three Months Ended March 31, 2019	Chubb Limited (Parent Guarantor)			Chubb INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net cash flows from (used for) operating activities	$	307		$	(163	)	$	1,378		$	(200	)	$	1,322
Cash flows from investing activities
Purchases of fixed maturities available for sale	—			(3		)	(5,558		)	—			(5,561		)
Purchases of fixed maturities held to maturity	—			—			(1		)	—			(1		)
Purchases of equity securities	—			—			(49		)	—			(49		)
Sales of fixed maturities available for sale	—			—			3,293			—			3,293
Sales of equity securities	—			—			60			—			60
Maturities and redemptions of fixed maturities available for sale	—			6			1,825			—			1,831
Maturities and redemptions of fixed maturities held to maturity	—			—			280			—			280
Net change in short-term investments	—			(3		)	(36		)	—			(39		)
Net derivative instruments settlements	—			(28		)	(330		)	—			(358		)
Private equity contributions	—			—			(410		)	—			(410		)
Private equity distributions	—			—			368			—			368
Capital contribution	—			(110		)	—			110			—
Other	—			(12		)	(75		)	—			(87		)
Net cash flows used for investing activities	—			(150		)	(633		)	110			(673		)
Cash flows from financing activities
Dividends paid on Common Shares	(336		)	—			—			—			(336		)
Common Shares repurchased	—			—			(367		)	—			(367		)
Proceeds from issuance of repurchase agreements	—			—			471			—			471
Repayment of repurchase agreements	—			—			(470		)	—			(470		)
Proceeds from share-based compensation plans	—			—			35			—			35
Dividend to parent company	—			—			(200		)	200			—
Advances (to) from affiliates	(266		)	308			(42		)	—			—
Capital contribution	—			—			110			(110		)	—
Net proceeds from affiliated notional cash pooling programs (1)	296			74			—			(370		)	—
Policyholder contract deposits	—			—			115			—			115
Policyholder contract withdrawals	—			—			(78		)	—			(78		)
Net cash flows from (used for) financing activities	(306		)	382			(426		)	(280		)	(630		)
Effect of foreign currency rate changes on cash and restricted cash	—			—			34			—			34
Net increase in cash and restricted cash	1			69			353			(370		)	53
Cash and restricted cash – beginning of period (1)	1			2			1,989			(652		)	1,340
Cash and restricted cash – end of period (1)	$	2		$	71		$	2,342		$	(1,022	)	$	1,393

⁽¹⁾  Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Various Chubb entities participate in one or the other of the Pools, pursuant to which credit and debit balances in individual Chubb accounts are translated daily into a single currency and pooled on a notional basis. Individual Chubb entities are permitted to overdraw on their individual accounts provided the overall Pool balances do not fall below zero. At March 31, 2019 and December 31, 2018, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

Condensed Consolidating Statement of Cash Flows

For the Three Months Ended March 31, 2018	Chubb Limited (Parent Guarantor)			Chubb INA Holdings Inc. (Subsidiary Issuer)			Other Chubb Limited Subsidiaries			Consolidating Adjustments and Eliminations			Chubb Limited Consolidated
(in millions of U.S. dollars)
Net cash flows from operating activities	$	24		$	2,727		$	800		$	(3,000	)	$	551
Cash flows from investing activities
Purchases of fixed maturities available for sale	—			(8		)	(5,964		)	—			(5,972		)
Purchases of fixed maturities held to maturity	—			—			(162		)	—			(162		)
Purchases of equity securities	—			—			(55		)	—			(55		)
Sales of fixed maturities available for sale	—			—			2,562			—			2,562
Sales of equity securities	—			—			40			—			40
Maturities and redemptions of fixed maturities    available for sale	—			3			1,862			—			1,865
Maturities and redemptions of fixed maturities held to maturity	—			—			255			—			255
Net change in short-term investments	—			(14		)	745			—			731
Net derivative instruments settlements	—			(7		)	46			—			39
Private equity contributions	—			—			(353		)	—			(353		)
Private equity distributions	—			—			201			—			201
Capital contribution	(750		)	(3,500		)	—			4,250			—
Other	—			(3		)	(29		)	—			(32		)
Net cash flows used for investing activities	(750		)	(3,529		)	(852		)	4,250			(881		)
Cash flows from financing activities
Dividends paid on Common Shares	(330		)	—			—			—			(330		)
Common Shares repurchased	—			—			(29		)	—			(29		)
Proceeds from issuance of long-term debt	—			2,175			—			—			2,175
Repayment of long-term debt	—			(300		)	—			—			(300		)
Proceeds from issuance of repurchase agreements	—			—			408			—			408
Repayment of repurchase agreements	—			—			(404		)	—			(404		)
Proceeds from share-based compensation plans	—			—			34			—			34
Dividend to parent company	—			—			(3,000		)	3,000			—
Advances (to) from affiliates	656			(95		)	(561		)	—			—
Capital contribution	—			—			4,250			(4,250		)	—
Net proceeds from (payments to) affiliated notional cash pooling programs (1)	400			(115		)	—			(285		)	—
Policyholder contract deposits	—			—			118			—			118
Policyholder contract withdrawals	—			—			(105		)	—			(105		)
Net cash flows from financing activities	726			1,665			711			(1,535		)	1,567
Effect of foreign currency rate changes on cash and restricted cash	(2		)	—			27			—			25
Net increase (decrease) in cash and restricted cash	(2		)	863			686			(285		)	1,262
Cash and restricted cash – beginning of period (1)	3			1			962			(115		)	851
Cash and restricted cash – end of period (1)	$	1		$	864		$	1,648		$	(400	)	$	2,113

⁽¹⁾  Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Various Chubb entities participate in one or the other of the Pools, pursuant to which credit and debit balances in individual Chubb accounts are translated daily into a single currency and pooled on a notional basis. Individual Chubb entities are permitted to overdraw on their individual accounts provided the overall Pool balances do not fall below zero. At March 31, 2018 and December 31, 2017, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

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General Schedule of Cash and Cash Equivalent (Details) - USD ($) $ in Millions		Mar. 31, 2019		Dec. 31, 2018		Mar. 31, 2018	Dec. 31, 2017
Cash and Cash Equivalents [Line Items]
Cash		$ 1,271	[1]	$ 1,247	[2]
Restricted cash	[1]	122		93
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		$ 1,393		$ 1,340		$ 2,113	$ 851

[1] Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Various Chubb entities participate in one or the other of the Pools, pursuant to which credit and debit balances in individual Chubb accounts are translated daily into a single currency and pooled on a notional basis. Individual Chubb entities are permitted to overdraw on their individual accounts provided the overall Pool balances do not fall below zero. At March 31, 2019, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[2] Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Various Chubb entities participate in one or the other of the Pools, pursuant to which credit and debit balances in individual Chubb accounts are translated daily into a single currency and pooled on a notional basis. Individual Chubb entities are permitted to overdraw on their individual accounts provided the overall Pool balances do not fall below zero. At December 31, 2018, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

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General Goodwill (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, Period Increase (Decrease)	$ 57

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General Adoption of New Accounting Pronouncements (Details) - USD ($) $ in Millions	Jan. 01, 2019	Mar. 31, 2019
Accounting Standards Update 2017-08 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax	$ 12
Cumulative Effect on Retained Earnings, before Tax	15
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect on Retained Earnings, before Tax	$ 0
Operating Lease, Right-of-Use Asset		$ 608
Operating Lease, Liability		$ 653

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Investments (Narrative) (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($) Security	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)
Investment [Line Items]
Net unrealized appreciation (depreciation) included in OCI	$ 9	$ (4)
Unrealized appreciation(depreciation) portion of AOCI with OTTI included in AOCI	$ 3		$ 1
Percentage of mortgage-backed securities represented by investments in US government agency bonds	82.00%		81.00%
Company Assumed Recovery Rate	32.00%
Moodys Historical Mean Recovery Rate	42.00%
Total number of fixed maturities | Security	30,335
Number of fixed maturities in an unrealized loss position | Security	10,095
Largest single unrealized loss in the fixed maturities	$ 6
Restricted assets in fixed maturities and short-term investments	22,000		$ 21,000
Restricted assets in cash	122		$ 93
Corporate securities
Investment [Line Items]
Credit losses recognized in net income	6	0
Mortgage-backed securities
Investment [Line Items]
Credit losses recognized in net income	$ 0	$ 0

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Investments Investments (Schedule Of Amortized Cost and Fair Value of Available-for-sale Securities and Related OTTI Recognized in AOCI) (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Available for sale, at amortized cost	$ 79,624	$ 79,323
Available-for-sale,Gross Unrealized Gain	1,480	690
Available-for-sale, Gross Unrealized Depreciation	(441)	(1,543)
Available for sale, Fair Value	80,663	78,470
Available for sale, OTTI recognized in AOCI	(6)	(7)
U.S. Treasury and agency
Debt Securities, Available-for-sale [Line Items]
Available for sale, at amortized cost	3,760	4,158
Available-for-sale,Gross Unrealized Gain	50	30
Available-for-sale, Gross Unrealized Depreciation	(19)	(43)
Available for sale, Fair Value	3,791	4,145
Available for sale, OTTI recognized in AOCI	0	0
Foreign
Debt Securities, Available-for-sale [Line Items]
Available for sale, at amortized cost	21,796	21,370
Available-for-sale,Gross Unrealized Gain	658	395
Available-for-sale, Gross Unrealized Depreciation	(112)	(349)
Available for sale, Fair Value	22,342	21,416
Available for sale, OTTI recognized in AOCI	0	0
Corporate securities
Debt Securities, Available-for-sale [Line Items]
Available for sale, at amortized cost	27,519	27,183
Available-for-sale,Gross Unrealized Gain	476	150
Available-for-sale, Gross Unrealized Depreciation	(170)	(750)
Available for sale, Fair Value	27,825	26,583
Available for sale, OTTI recognized in AOCI	(5)	(6)
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Available for sale, at amortized cost	16,369	15,758
Available-for-sale,Gross Unrealized Gain	173	66
Available-for-sale, Gross Unrealized Depreciation	(112)	(284)
Available for sale, Fair Value	16,430	15,540
Available for sale, OTTI recognized in AOCI	(1)	(1)
States, municipalities, and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Available for sale, at amortized cost	10,180	10,854
Available-for-sale,Gross Unrealized Gain	123	49
Available-for-sale, Gross Unrealized Depreciation	(28)	(117)
Available for sale, Fair Value	10,275	10,786
Available for sale, OTTI recognized in AOCI	$ 0	$ 0

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Investments (Schedule Of Amortized Cost And Fair Value Of HTM Fixed Maturities And Related OTTI Recognized In Accumulated Other Comprehensive Income) (Detail) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Investment [Line Items]
Held to maturity, Amortized Cost	$ 13,136	$ 13,435
Held to maturity, Gross Unrealized Appreciation	158	51
Held to maturity, Gross Unrealized Depreciation	(54)	(227)
Held to maturity, at Fair Value	13,240	13,259
Held to maturity, OTTI recognized in AOCI	0	0
U.S. Treasury and agency
Investment [Line Items]
Held to maturity, Amortized Cost	1,144	1,185
Held to maturity, Gross Unrealized Appreciation	11	8
Held to maturity, Gross Unrealized Depreciation	(3)	(11)
Held to maturity, at Fair Value	1,152	1,182
Held to maturity, OTTI recognized in AOCI	0	0
Foreign
Investment [Line Items]
Held to maturity, Amortized Cost	1,503	1,549
Held to maturity, Gross Unrealized Appreciation	34	11
Held to maturity, Gross Unrealized Depreciation	(3)	(18)
Held to maturity, at Fair Value	1,534	1,542
Held to maturity, OTTI recognized in AOCI	0	0
Corporate securities
Investment [Line Items]
Held to maturity, Amortized Cost	2,543	2,601
Held to maturity, Gross Unrealized Appreciation	30	11
Held to maturity, Gross Unrealized Depreciation	(34)	(104)
Held to maturity, at Fair Value	2,539	2,508
Held to maturity, OTTI recognized in AOCI	0	0
Mortgage-backed securities
Investment [Line Items]
Held to maturity, Amortized Cost	2,484	2,524
Held to maturity, Gross Unrealized Appreciation	16	5
Held to maturity, Gross Unrealized Depreciation	(6)	(43)
Held to maturity, at Fair Value	2,494	2,486
Held to maturity, OTTI recognized in AOCI	0	0
States, municipalities, and political subdivisions
Investment [Line Items]
Held to maturity, Amortized Cost	5,462	5,576
Held to maturity, Gross Unrealized Appreciation	67	16
Held to maturity, Gross Unrealized Depreciation	(8)	(51)
Held to maturity, at Fair Value	5,521	5,541
Held to maturity, OTTI recognized in AOCI	$ 0	$ 0

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Investments (Schedule Of Fixed Maturities By Contractual Maturity) (Detail) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Available for sale, Due in 1 year or less, Amortized Cost	$ 3,776	$ 3,569
Available for sale, Due after 1 year through 5 years, Amortized Cost	27,308	27,134
Available for sale, Due after 5 years though 10 years, Amortized Cost	23,367	24,095
Available for sale, Due after 10 years, Amortized Cost	8,804	8,767
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	63,255	63,565
Available for sale, Mortgage-backed securities, Amortized Cost	16,369	15,758
Available for sale, at amortized cost	79,624	79,323
Available for sale, Due in 1 year or less, Fair Value	3,785	3,568
Available for sale, Due after 1 year through 5 years, Fair Value	27,593	27,005
Available for sale, Due after 5 years through 10 years, Fair Value	23,690	23,543
Available for sale, Due after 10 years, Fair Value	9,165	8,814
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value	64,233	62,930
Available for sale, Mortgage backed securities, Fair Value	16,430	15,540
Available for sale, Fair Value	80,663	78,470
Held to maturity, Due in 1 year or less, Amortized Cost	614	536
Held to maturity, Due after 1 year through 5 years, Amortized Cost	3,111	3,122
Held to maturity, Due after 5 years through 10 years, Amortized Cost	4,246	4,468
Held to maturity, Due after 10 years, Amortized Cost	2,681	2,785
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Amortized Cost	10,652	10,911
Held to maturity, Mortgage backed securities, Amortized Cost	2,484	2,524
Held to maturity, Amortized Cost	13,136	13,435
Held to maturity, Due in 1 year or less, Fair Value	616	537
Held to maturity, Due after 1 year through 5, Fair Value	3,125	3,106
Held to maturity, Due after 5 years through 10 years, Fair Value	4,287	4,407
Held to maturity, Due after 10 years, Fair Value	2,718	2,723
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Fair Value	10,746	10,773
Held to maturity, Mortgage backed securities, Fair Value	2,494	2,486
Held to maturity, Fair Value	$ 13,240	$ 13,259

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Investments (Net Realized Gains (Losses) And Losses Included In Net Realized Gains (Losses) And Other Comprehensive Income) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Gain (Loss) on Securities [Line Items]
OTTI on fixed maturities, gross and net	$ 13	$ 1
Foreign exchange gains (losses)	13	(77)
Gain (Loss) on Derivative	(80)	79
Fair Value Adjustments On Insurance Derivative Gains Losses	114	38
Net Realized Gains (Losses)	(97)	(2)
Investment and embedded derivative instruments
Gain (Loss) on Securities [Line Items]
Gain (Loss) on Derivative	(130)	17
S&P put options and futures
Gain (Loss) on Securities [Line Items]
Gain (Loss) on Derivative	(63)	22
Other derivative instruments
Gain (Loss) on Securities [Line Items]
Gain (Loss) on Derivative	(1)	2
Fixed Maturities [Member]
Gain (Loss) on Securities [Line Items]
OTTI on fixed maturities, gross and net	(13)	(1)
Debt Securities, Available-for-sale, Realized Gain (Loss), Excluding Other-than-temporary Impairment	27	66
Debt Securities, Available-for-sale, Realized Loss, Excluding Other-than-temporary Impairment	(58)	(88)
Debt Securities, Available-for-sale, Realized Gain (Loss)	(44)	(23)
Equity Securities [Member]
Gain (Loss) on Securities [Line Items]
Equity Securities, FV-NI, Realized Gain	64	10
Equity Securities, FV-NI, Realized Loss	(6)	(21)
Equity Securities, FV-NI, Realized Gain (Loss)	58	(11)
Other Investments [Member]
Gain (Loss) on Securities [Line Items]
Other investments gain (loss)	(44)	29
Other [Member]
Gain (Loss) on Securities [Line Items]
Other	$ 0	$ 1

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Investments (Roll-Forward Of Pre-Tax Credit Losses Related To Fixed Maturities For Which Portion Of Other-Than-Temporary Impairment Was Recognized In Other Comprehensive Income) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Roll-Forward Of Pre-Tax Credit Losses Related To Fixed Maturities For Which Portion Of Other-Than-Temporary Impairment Was Recognized In Other Comprehensive Income [Roll Forward]
Balance of credit losses related to securities still held – beginning of period	$ 34	$ 22
Additions where no OTTI was previously recorded	6	0
Reductions for securities sold during the period	(8)	(7)
Balance of credit losses related to securities still held – end of period	$ 32	$ 15

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Investments Schedule of Gains and Losses on Equity and Other Investments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Equity Securities [Member]
Gain (Loss) on Securities [Line Items]
Equity Securities, FV-NI, Realized Gain (Loss)	$ 58	$ (11)
Other Investments [Member]
Gain (Loss) on Securities [Line Items]
Net gains (losses) recognized during the period	(44)	29
Accounting Standards Update 2016-01 [Member] | Equity Securities [Member]
Gain (Loss) on Securities [Line Items]
Equity Securities, FV-NI, Realized Gain (Loss)	58	(11)
Less: Net gains (losses) recognized from sales of securities	1	10
Unrealized gains (losses) recognized for securities still held at reporting date	57	(21)
Accounting Standards Update 2016-01 [Member] | Other Investments [Member]
Gain (Loss) on Securities [Line Items]
Net gains (losses) recognized during the period	(44)	29
Less: Net gains (losses) recognized from sales of securities	(2)	0
Unrealized gains (losses) recognized for securities still held at reporting date	(42)	29
Accounting Standards Update 2016-01 [Member] | Equity securities and other investments [Member]
Gain (Loss) on Securities [Line Items]
Net gains (losses) recognized during the period	14	18
Less: Net gains (losses) recognized from sales of securities	(1)	10
Unrealized gains (losses) recognized for securities still held at reporting date	$ 15	$ 8

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Investments (Aggregate Fair Value And Gross Unrealized Loss By Length Of Time Security Has Continuously Been In Unrealized Loss Position) (Detail) - Fixed Maturities [Member] - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Investment [Line Items]
Fair Value 0-12 months	$ 5,544	$ 34,952
Gross unrealized (loss) 0-12 months	(89)	(953)
Fair Value over 12 months	26,573	27,762
Gross unrealized (loss) over 12 months	(406)	(817)
Fair Value	32,117	62,714
Gross unrealized (loss)	(495)	(1,770)
U.S. Treasury and agency
Investment [Line Items]
Fair Value 0-12 months	68	523
Gross unrealized (loss) 0-12 months	0	(4)
Fair Value over 12 months	2,298	2,859
Gross unrealized (loss) over 12 months	(22)	(50)
Fair Value	2,366	3,382
Gross unrealized (loss)	(22)	(54)
Foreign
Investment [Line Items]
Fair Value 0-12 months	1,346	6,764
Gross unrealized (loss) 0-12 months	(26)	(208)
Fair Value over 12 months	4,228	5,349
Gross unrealized (loss) over 12 months	(89)	(159)
Fair Value	5,574	12,113
Gross unrealized (loss)	(115)	(367)
Corporate securities
Investment [Line Items]
Fair Value 0-12 months	3,649	16,538
Gross unrealized (loss) 0-12 months	(62)	(599)
Fair Value over 12 months	6,206	4,873
Gross unrealized (loss) over 12 months	(142)	(255)
Fair Value	9,855	21,411
Gross unrealized (loss)	(204)	(854)
Mortgage-backed securities
Investment [Line Items]
Fair Value 0-12 months	388	6,103
Gross unrealized (loss) 0-12 months	(1)	(98)
Fair Value over 12 months	8,974	6,913
Gross unrealized (loss) over 12 months	(117)	(229)
Fair Value	9,362	13,016
Gross unrealized (loss)	(118)	(327)
States, municipalities, and political subdivisions
Investment [Line Items]
Fair Value 0-12 months	93	5,024
Gross unrealized (loss) 0-12 months	0	(44)
Fair Value over 12 months	4,867	7,768
Gross unrealized (loss) over 12 months	(36)	(124)
Fair Value	4,960	12,792
Gross unrealized (loss)	$ (36)	$ (168)

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Investments (Schedule Of Components Of Restricted Assets) (Detail) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Trust funds	$ 13,943	$ 13,988
Deposits with U.S. regulatory authorities	2,904	2,405
Deposits with non-U.S. regulatory authorities	2,851	2,531
Assets pledged under repurchase agreements	1,478	1,468
Other pledged assets	942	692
Total restricted assets	$ 22,118	$ 21,084

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Fair value measurements Fair Value Measurements (narrative) (Details)	3 Months Ended
	Mar. 31, 2019
Minimum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Notice Period For Redemption For Alternative Investments Investment Funds	5 days
Maximum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Notice Period For Redemption For Alternative Investments Investment Funds	120 days

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Fair Value Measurements (Financial Instruments Measured At Fair Value On Recurring Basis) (Detail) - USD ($) $ in Millions		Mar. 31, 2019		Dec. 31, 2018		Mar. 31, 2018	Dec. 31, 2017
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		$ 80,663		$ 78,470
Equity securities, at fair value and cost		821		770
Other Investments		5,562		5,277
Securities lending collateral		1,861		1,926
U.S. Treasury and agency
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		3,791		4,145
Foreign
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		22,342		21,416
Corporate securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		27,825		26,583
Mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		16,430		15,540
States, municipalities, and political subdivisions
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		10,275		10,786
Investment Funds Limited Partnerships Partially Owned Investment Companies Fair Value [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Other Investments		4,464		4,244
Other Investments [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Other Investments		91		95
Fair Value, Measurements, Recurring [Member] | Level 1
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		3,168		3,400
Equity securities, at fair value and cost		766		713
Short-term investments		1,785		1,575
Other Investments		411	[1]	381	[2]
Securities lending collateral				0
Investment derivative instruments, assets		15		28
Other Derivative Instruments Fair Value		7		25
Separate Account Assets		2,991		2,686
Total assets measured at fair value		9,143	[1]	8,808	[2]
Investment derivative instruments, liabilities		52		38
Other derivative instruments, liability		12
Liabilities Related to Investment Contracts, Fair Value Disclosure		64		38
Fair Value, Measurements, Recurring [Member] | Level 1 | U.S. Treasury and agency
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		3,168		3,400
Fair Value, Measurements, Recurring [Member] | Level 2
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		75,715		73,365
Short-term investments		1,293		1,440
Other Investments		342	[1]	303	[2]
Securities lending collateral		1,861		1,926
Separate Account Assets		139		137
Total assets measured at fair value		79,350	[1]	77,171	[2]
Investment derivative instruments, liabilities		195		115
Liabilities Related to Investment Contracts, Fair Value Disclosure		195		115
Fair Value, Measurements, Recurring [Member] | Level 2 | U.S. Treasury and agency
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		623		745
Fair Value, Measurements, Recurring [Member] | Level 2 | Foreign
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		21,982		21,071
Fair Value, Measurements, Recurring [Member] | Level 2 | Corporate securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		26,483		25,284
Fair Value, Measurements, Recurring [Member] | Level 2 | Mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		16,352		15,479
Fair Value, Measurements, Recurring [Member] | Level 2 | States, municipalities, and political subdivisions
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		10,275		10,786
Fair Value, Measurements, Recurring [Member] | Level 3
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		1,780		1,705
Equity securities, at fair value and cost		55		57
Short-term investments				1
Other Investments		11	[1]	11	[2]
Total assets measured at fair value		1,846	[1]	1,774	[2]
Liabilities Related to Investment Contracts, Fair Value Disclosure		338		452
Fair Value, Measurements, Recurring [Member] | Level 3 | Foreign
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		360		345
Fair Value, Measurements, Recurring [Member] | Level 3 | Corporate securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		1,342		1,299
Fair Value, Measurements, Recurring [Member] | Level 3 | Mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		78		61
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		80,663		78,470
Equity securities, at fair value and cost		821		770
Short-term investments		3,078		3,016
Other Investments		764	[1]	695	[2]
Securities lending collateral		1,861		1,926
Investment derivative instruments, assets		15		28
Other Derivative Instruments Fair Value		7		25
Separate Account Assets		3,130		2,823
Total assets measured at fair value		90,339	[1]	87,753	[2]
Investment derivative instruments, liabilities		247		153
Other derivative instruments, liability		12
Liabilities Related to Investment Contracts, Fair Value Disclosure		597		605
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] | U.S. Treasury and agency
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		3,791		4,145
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] | Foreign
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		22,342		21,416
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] | Corporate securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		27,825		26,583
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] | Mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		16,430		15,540
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] | States, municipalities, and political subdivisions
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale, Fair Value		10,275		10,786
Guaranteed Minimum Income Benefit [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value		338		452		$ 167	$ 204
Guaranteed Minimum Income Benefit [Member] | Fair Value, Measurements, Recurring [Member] | Level 3
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	[3]	338		$ 452
Guaranteed Minimum Income Benefit [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	[3]	$ 338

[1] Excluded from the table above are partially-owned investments, investment funds, and limited partnerships of $4,464 million and other investments of $91 million at March 31, 2019 measured using NAV as a practical expedient.

[2] Excluded from the table above are partially-owned investments, investment funds, and limited partnerships of $4,244 million and other investments of $95 million at December 31, 2018 measured using NAV as a practical expedient.

[3] Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the Consolidated balance sheets.

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Fair Value Measurements (Fair Value And Maximum Future Funding Commitments Related To Investments) (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Maximum future funding commitments	$ 3,642	$ 3,705
Alternative Investment	4,464	4,244
Real Assets
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Maximum future funding commitments	449	362
Alternative Investment	$ 762	$ 704
Real Assets | Minimum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period	2 years	2 years
Real Assets | Maximum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period	11 years	11 years
Distressed
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Maximum future funding commitments	$ 98	$ 105
Alternative Investment	$ 263	$ 296
Distressed | Minimum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period	2 years	2 years
Distressed | Maximum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period	7 years	7 years
Private Credit
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Maximum future funding commitments	$ 291	$ 310
Alternative Investment	$ 134	$ 147
Private Credit | Minimum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period	3 years	3 years
Private Credit | Maximum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period	8 years	8 years
Traditional
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Maximum future funding commitments	$ 2,573	$ 2,735
Alternative Investment	$ 2,331	$ 2,362
Traditional | Minimum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period	2 years	2 years
Traditional | Maximum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period	14 years	14 years
Vintage
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Maximum future funding commitments	$ 43
Alternative Investment	$ 125	$ 56
Vintage | Minimum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period	1 year	1 year
Vintage | Maximum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period	2 years	2 years
Investment funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Alternative Investment	$ 258	$ 83
Financial
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Maximum future funding commitments	188	193
Alternative Investment	$ 591	$ 596
Financial | Minimum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period	2 years	2 years
Financial | Maximum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period	9 years	9 years

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Fair Value Measurements (Schedule Of Significant Unobservable Inputs Used In Level 3 Liability Valuations) (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurements, Valuation Processes, Description	[1]	Actuarial model
Minimum [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate	[1]	3.00%
Significant Unobservable Inputs Annuitization Rate	[1]	0.00%
Maximum [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate	[1]	32.00%
Significant Unobservable Inputs Annuitization Rate	[1]	42.00%
Guaranteed Minimum Income Benefit [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value		$ 338	$ 452	$ 167	$ 204
Guaranteed Minimum Income Benefit [Member] | Level 3 | Fair Value, Measurements, Recurring [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	[2]	$ 338	$ 452

[1] Discussion of the most significant inputs used in the fair value measurement of GLB and the sensitivity of those assumptions is included within Note 3 a) Guaranteed living benefits.

[2] Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the Consolidated balance sheets.

XML

Fair Value Measurements (Assets Measured At Fair Value Using Significant Unobservable Inputs) (Detail) - Level 3 - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Mortgage-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance- Beginning of Period, Assets	$ 61	$ 78
Transfers Into Level 3, Asset	0	1
Transfers out of Level 3, Assets	0	0
Asset, Net realized Gain (Loss) Included in Other Comprehensive Income (Loss)	0	0
Net Realized Gains/ (Losses), Assets	0	0
Purchases, Assets	18	4
Sales, Assets	0	0
Settlements, Assets	(1)	0
Balance-End of Period, Assets	78	83
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0	0
Corporate securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance- Beginning of Period, Assets	1,299	1,037
Transfers Into Level 3, Asset	5	0
Transfers out of Level 3, Assets	0	(10)
Asset, Net realized Gain (Loss) Included in Other Comprehensive Income (Loss)	4	(3)
Net Realized Gains/ (Losses), Assets	1	0
Purchases, Assets	128	139	[1]
Sales, Assets	(37)	(51)
Settlements, Assets	(58)	(39)
Balance-End of Period, Assets	1,342	1,073
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0	0
Foreign
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance- Beginning of Period, Assets	345	93
Transfers Into Level 3, Asset	3	7
Transfers out of Level 3, Assets	(15)	0
Asset, Net realized Gain (Loss) Included in Other Comprehensive Income (Loss)	6	9
Net Realized Gains/ (Losses), Assets	(1)	0
Purchases, Assets	53	87
Sales, Assets	(5)	(19)
Settlements, Assets	(26)	(1)
Balance-End of Period, Assets	360	176
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0	0
Equity Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance- Beginning of Period, Assets	57	44
Transfers Into Level 3, Asset	0	0
Transfers out of Level 3, Assets	0	0
Asset, Net realized Gain (Loss) Included in Other Comprehensive Income (Loss)	1	1
Net Realized Gains/ (Losses), Assets	(2)	2
Purchases, Assets	9	17
Sales, Assets	(10)	0
Settlements, Assets	0	0
Balance-End of Period, Assets	55	64
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	(1)	0
Short-term Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance- Beginning of Period, Assets	1	0
Transfers Into Level 3, Asset	0	5
Transfers out of Level 3, Assets	0	0
Asset, Net realized Gain (Loss) Included in Other Comprehensive Income (Loss)	0	0
Net Realized Gains/ (Losses), Assets	0	0
Purchases, Assets	0	8
Sales, Assets	0	0
Settlements, Assets	(1)	(1)
Balance-End of Period, Assets	0	12
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0
Other Long-term Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance- Beginning of Period, Assets	11	263
Transfers Into Level 3, Asset	0	0
Transfers out of Level 3, Assets	0	0
Asset, Net realized Gain (Loss) Included in Other Comprehensive Income (Loss)	0	2
Net Realized Gains/ (Losses), Assets	0	0
Purchases, Assets	0	14
Sales, Assets	0	0
Settlements, Assets	0	(9)
Balance-End of Period, Assets	11	270
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	$ 0	$ 0

[1] Purchases in Level 3 primarily consist of privately-placed fixed income securities.

XML

Fair value measurements Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019		Mar. 31, 2018		Dec. 31, 2018	Dec. 31, 2017
Derivative Financial Instruments, Liabilities [Member] | Level 3
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance - Beginning of Period, Liabilities			$ 2
Transfers into level 3, liability			0
Transfers out of Level 3, Liabilities			0
Change in Net Unrealized Gains (Losses) included in OCI, Liabilities			0
Net Realized Gains/Losses, Liabilities			0
Purchases, Liabilities			0
Sales, Liabilities			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements			0
Balance - End of Period, Liabilities			2
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)			0
Guaranteed Minimum Income Benefit [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Reported liabilities	$ 741		529		$ 861	$ 550
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance - Beginning of Period, Liabilities	452		204
Balance - End of Period, Liabilities	338		167
Guaranteed Minimum Income Benefit [Member] | Guarantees [Member] | Level 3
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance - Beginning of Period, Liabilities	452	[1]	204	[2]
Transfers into level 3, liability	0		0
Transfers out of Level 3, Liabilities	0		0
Change in Net Unrealized Gains (Losses) included in OCI, Liabilities	0		0
Net Realized Gains/Losses, Liabilities	(114)		(37)
Purchases, Liabilities	0		0
Sales, Liabilities	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	0		0
Balance - End of Period, Liabilities	338	[1]	167	[2]
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)	$ (114)		$ (37)

[1] Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the Consolidated balance sheets. The liability for GLB reinsurance was $741 million at March 31, 2019, and $861 million at December 31, 2018, which includes a fair value derivative adjustment of $338 million and 452 million, respectively

[2] Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the Consolidated balance sheets. The liability for GLB reinsurance was $529 million at March 31, 2018, and $550 million at December 31, 2017, which includes a fair value derivative adjustment of $167 million and $204 million, respectively.

XML

Fair Value Measurements (Carrying Values And Fair Values Of Financial Instruments Not Measured At Fair Value) (Detail) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	$ 13,240	$ 13,259
Debt Securities, Held-to-maturity	13,136	13,435
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Repurchase agreements	1,419	1,418
Short-term debt	509	509
Long-term debt	12,071	12,087
Trust preferred securities	308	308
Total liabilities	118,992	117,459
U.S. Treasury and agency
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	1,152	1,182
Debt Securities, Held-to-maturity	1,144	1,185
Foreign
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	1,534	1,542
Debt Securities, Held-to-maturity	1,503	1,549
Corporate securities
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	2,539	2,508
Debt Securities, Held-to-maturity	2,543	2,601
Mortgage-backed securities
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	2,494	2,486
Debt Securities, Held-to-maturity	2,484	2,524
States, municipalities, and political subdivisions
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	5,521	5,541
Debt Securities, Held-to-maturity	5,462	5,576
Level 1
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	1,098	1,128
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Repurchase agreements	0	0
Short-term Debt, Fair Value	0	0
Long-term Debt, Fair Value	0	0
Trust preferred securities	0	0
Total liabilities	0	0
Level 1 | U.S. Treasury and agency
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	1,098	1,128
Level 1 | Foreign
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	0	0
Level 1 | Corporate securities
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	0	0
Level 1 | Mortgage-backed securities
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	0	0
Level 1 | States, municipalities, and political subdivisions
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	0	0
Level 2
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	12,112	12,100
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Repurchase agreements	1,419	1,418
Short-term Debt, Fair Value	512	516
Long-term Debt, Fair Value	12,719	12,181
Trust preferred securities	425	409
Total liabilities	15,075	14,524
Level 2 | U.S. Treasury and agency
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	54	54
Level 2 | Foreign
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	1,534	1,542
Level 2 | Corporate securities
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	2,509	2,477
Level 2 | Mortgage-backed securities
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	2,494	2,486
Level 2 | States, municipalities, and political subdivisions
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	5,521	5,541
Level 3
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	30	31
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Repurchase agreements	0	0
Short-term Debt, Fair Value	0	0
Long-term Debt, Fair Value	0	0
Trust preferred securities	0	0
Total liabilities	0	0
Level 3 | U.S. Treasury and agency
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	0	0
Level 3 | Foreign
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	0	0
Level 3 | Corporate securities
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	30	31
Level 3 | Mortgage-backed securities
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	0	0
Level 3 | States, municipalities, and political subdivisions
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	0	0
Estimate of Fair Value Measurement [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	13,240	13,259
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Repurchase agreements	1,419	1,418
Short-term Debt, Fair Value	512	516
Long-term Debt, Fair Value	12,719	12,181
Trust preferred securities	425	409
Total liabilities	15,075	14,524
Estimate of Fair Value Measurement [Member] | U.S. Treasury and agency
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	1,152	1,182
Estimate of Fair Value Measurement [Member] | Foreign
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	1,534	1,542
Estimate of Fair Value Measurement [Member] | Corporate securities
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	2,539	2,508
Estimate of Fair Value Measurement [Member] | Mortgage-backed securities
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	2,494	2,486
Estimate of Fair Value Measurement [Member] | States, municipalities, and political subdivisions
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity, Fair Value	5,521	5,541
Reported Value Measurement [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity	13,136	13,435
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Repurchase agreements	1,419	1,418
Short-term debt	509	509
Long-term debt	12,071	12,087
Trust preferred securities	308	308
Total liabilities	14,307	14,322
Reported Value Measurement [Member] | U.S. Treasury and agency
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity	1,144	1,185
Reported Value Measurement [Member] | Foreign
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity	1,503	1,549
Reported Value Measurement [Member] | Corporate securities
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity	2,543	2,601
Reported Value Measurement [Member] | Mortgage-backed securities
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity	2,484	2,524
Reported Value Measurement [Member] | States, municipalities, and political subdivisions
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Debt Securities, Held-to-maturity	$ 5,462	$ 5,576

XML

Unpaid losses and loss expenses (RF) (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Unpaid Losses and Loss Expenses [Roll Forward]
Gross unpaid losses and loss expenses – beginning of period		$ 62,960	$ 63,179
Reinsurance recoverable on unpaid losses - beginning of period (1)	[1]	(14,689)	(14,014)
Net unpaid losses and loss expenses – beginning of period		48,271	49,165
Current Year Claims and Claims Adjustment Expense		4,326	4,358
Prior Year Claims and Claims Adjustment Expense	[2]	(228)	(256)
Total, Incurred		4,098	4,102
Net loss and loss expenses paid, Current Year		785	809
Net loss and loss expenses paid, Prior Years		3,234	3,433
Total, Paid		4,019	4,242
Liability For Unpaid Claims And Claims Adjustment Expense Foreign Currency Revaluation And Other		86	292
Net unpaid losses and loss expenses – end of period		48,436	49,317
Reinsurance recoverable on unpaid losses (1)	[1]	14,707	13,822
Gross unpaid losses and loss expenses – end of period		63,143	63,139
prior period development, net adjustments		$ 24	$ 47

[1] Net of provision for uncollectible reinsurance.

[2] Relates to prior period loss reserve development only and excludes prior period development related to reinstatement premiums, expense adjustments and earned premiums totaling $24 million and $47 million for the three months ended March 31, 2019 and 2018, respectively.

XML

Unpaid losses and loss expenses Unpaid losses and loss expenses (PPD table) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	$ (204)	$ (209)
North America Commercial P&C Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(131)	(101)
North America Personal P&C Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(10)	(6)
North American Agriculture Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(61)	(76)
Overseas General Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(4)	(22)
Global Reinsurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(8)	(14)
Corporate Segment [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	10	10
Short Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(148)	(227)
Short Tail [Member] | North America Commercial P&C Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(66)	(109)
Short Tail [Member] | North America Personal P&C Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(10)	(6)
Short Tail [Member] | North American Agriculture Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(61)	(76)
Short Tail [Member] | Overseas General Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(4)	(22)
Short Tail [Member] | Global Reinsurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(7)	(14)
Short Tail [Member] | Corporate Segment [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	0	0
Long Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(56)	18
Long Tail [Member] | North America Commercial P&C Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(65)	8
Long Tail [Member] | North America Personal P&C Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	0	0
Long Tail [Member] | North American Agriculture Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	0	0
Long Tail [Member] | Overseas General Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	0	0
Long Tail [Member] | Global Reinsurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(1)	0
Long Tail [Member] | Corporate Segment [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	$ 10	$ 10

XML

Unpaid losses and loss expenses Unpaid losses and loss expenses (narrative) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Liability for Claims and Claims Adjustment Expense [Line Items]
Liability for unpaid claims and claims adjustment expense, period increase (decrease), excluding CATs, PPD, and other	$ 557
Net Prior Period Development	(204)	$ (209)
Long Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(56)	18
Short Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(148)	(227)
North America Commercial P&C Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(131)	(101)
North America Commercial P&C Insurance [Member] | Long Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(65)	8
North America Commercial P&C Insurance [Member] | Short Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(66)	(109)
North America Commercial P&C Insurance [Member] | General Liability [Member] | Long Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development		16
North America Commercial P&C Insurance [Member] | Other [Member] | Long Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	3	40
North America Commercial P&C Insurance [Member] | Other [Member] | Short Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development		(34)
North America Commercial P&C Insurance [Member] | Surety Product Line [Member] | Short Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development		(19)
North America Commercial P&C Insurance [Member] | Accident Year 2013 and prior [Member] | Commercial Excess and Umbrella [Member] | Long Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(31)
North America Commercial P&C Insurance [Member] | Accident years 2012 and prior [Member] | Commercial Excess and Umbrella [Member] | Long Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development		(29)
North America Commercial P&C Insurance [Member] | Short-duration Insurance Contracts, Accident Year 2017 [Member] | Surety Product Line [Member] | Short Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(49)
North America Commercial P&C Insurance [Member] | Short-duration Insurance Contracts, Accident Year 2017 [Member] | Catastrophe [Member] | Other [Member] | Long Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development		(3)
North America Commercial P&C Insurance [Member] | Short-duration Insurance Contracts, Accident Year 2017 [Member] | Catastrophe [Member] | Commercial Property and Marine [Member] | Short Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development		(75)
North America Commercial P&C Insurance [Member] | Accident Year 2015 - 2017 [Member] | Other [Member] | Short Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(17)
North America Commercial P&C Insurance [Member] | Accident year 2015 and prior [Member] | Professional Malpractice Liability Insurance [Member] | Long Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(57)
North America Commercial P&C Insurance [Member] | Accident year 2015 and prior [Member] | North America Workers' Compensation [Member] | Long Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(30)
North America Commercial P&C Insurance [Member] | Accident years 2013 - 2018 [Member] | Auto & General Liability [Member] | Long Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	50
North America Personal P&C Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(10)	(6)
North America Personal P&C Insurance [Member] | Long Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	0	0
North America Personal P&C Insurance [Member] | Short Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(10)	(6)
North America Personal P&C Insurance [Member] | Catastrophe [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development		(6)
North America Personal P&C Insurance [Member] | Non-catastrophe [Member] | Short Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	122
North America Personal P&C Insurance [Member] | Accident years 2017 - 2018 [Member] | Catastrophe [Member] | Short Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(132)
North America Agricultural Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(61)	(76)
North America Agricultural Insurance [Member] | Long Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	0	0
North America Agricultural Insurance [Member] | Short Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(61)	(76)
Overseas General Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(4)	(22)
Overseas General Insurance [Member] | Long Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	0	0
Overseas General Insurance [Member] | Short Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(4)	(22)
Overseas General Insurance [Member] | Other [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(7)
Overseas General Insurance [Member] | Short-duration Insurance Contracts, Accident Year 2017 [Member] | Catastrophe [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development		(12)
Overseas General Insurance [Member] | Short-duration Insurance Contracts, Accident Year 2018 [Member] | Catastrophe [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	3
Global Reinsurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(8)	(14)
Global Reinsurance [Member] | Long Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(1)	0
Global Reinsurance [Member] | Short Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(7)	(14)
Global Reinsurance [Member] | Other [Member] | Short Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(12)
Global Reinsurance [Member] | Short-duration Insurance Contracts, Accident Year 2017 [Member] | Catastrophe [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development		(10)
Global Reinsurance [Member] | Short-duration Insurance Contracts, Accident Year 2018 [Member] | Catastrophe [Member] | Short Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	5
Corporate Segment [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	10	10
Corporate Segment [Member] | Long Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	10	10
Corporate Segment [Member] | Short Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	$ 0	$ 0

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Commitments, Contingencies, And Guarantees (Narrative) (Detail) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Financial Instruments Owned and Pledged as Collateral [Line Items]
Derivative liability subject to a master netting agreement	$ 234	$ 95
Repurchase agreements	1,419	$ 1,418
Purchase Commitment, Remaining Minimum Amount Committed	792
Carrying value of limited partnerships and partially-owned investment companies included in other investments	4,200
Funding commitments relating to limited partnerships and partially-owned investment companies	3,600
Unrecognized tax benefits	$ 14

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Commitments, Contingencies, And Guarantees (Balance Sheet Locations, Fair Values In Asset Or (Liability) Position, And Notional Values/Payment Provisions Of Derivative Instruments) (Detail) - USD ($) $ in Millions		Mar. 31, 2019	Dec. 31, 2018
Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Notional Value/Payment Provision		$ 2,559	$ 2,185
Cross-currency swaps
Derivatives, Fair Value [Line Items]
Notional Value/Payment Provision		45	45
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Notional Value/Payment Provision		5,250	5,250
Options/Futures contracts on notes, bonds, and equities
Derivatives, Fair Value [Line Items]
Notional Value/Payment Provision		1,080	1,046
Convertible securities
Derivatives, Fair Value [Line Items]
Notional Value/Payment Provision	[1]	9	11
To be announced [Member]
Derivatives, Fair Value [Line Items]
Notional Value/Payment Provision		0	6
Total investment and embedded derivative instruments
Derivatives, Fair Value [Line Items]
Notional Value/Payment Provision		8,943	8,543
Fair Value, Asset		23	43
Futures contracts on equities (3)
Derivatives, Fair Value [Line Items]
Notional Value/Payment Provision	[2]	537	507
Other
Derivatives, Fair Value [Line Items]
Notional Value/Payment Provision		184	74
Other Derivative Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Value/Payment Provision		721	581
Guaranteed Minimum Income Benefit [Member]
Derivatives, Fair Value [Line Items]
Notional Value/Payment Provision	[3]	1,458	1,750
Fair Value, Asset	[3]	0	0
Other Assets [Member] | Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Fair Value, Asset		9	15
Other Assets [Member] | Cross-currency swaps
Derivatives, Fair Value [Line Items]
Fair Value, Asset		0	0
Other Assets [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Fair Value, Asset		0	0
Other Assets [Member] | Options/Futures contracts on notes, bonds, and equities
Derivatives, Fair Value [Line Items]
Fair Value, Asset		6	13
Other Assets [Member] | Futures contracts on equities (3)
Derivatives, Fair Value [Line Items]
Fair Value, Asset	[2]	0	23
Other Assets [Member] | Other
Derivatives, Fair Value [Line Items]
Fair Value, Asset		7	2
Other Assets [Member] | Other Derivative Instruments [Member]
Derivatives, Fair Value [Line Items]
Fair Value, Asset		7	25
Fixed Maturities [Member] | Convertible securities
Derivatives, Fair Value [Line Items]
Fair Value, Asset	[1]	8	9
Fixed Maturities [Member] | To be announced [Member]
Derivatives, Fair Value [Line Items]
Fair Value, Liability		0	0
Fair Value, Asset		0	6
Equity Securities [Member] | Convertible securities
Derivatives, Fair Value [Line Items]
Fair Value, Liability	[1]	0	0
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Fair Value, Liability		(28)	(19)
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Cross-currency swaps
Derivatives, Fair Value [Line Items]
Fair Value, Liability		0	0
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Fair Value, Liability		(195)	(115)
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Options/Futures contracts on notes, bonds, and equities
Derivatives, Fair Value [Line Items]
Fair Value, Liability		(24)	(19)
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Total investment and embedded derivative instruments
Derivatives, Fair Value [Line Items]
Fair Value, Liability		(247)	(153)
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Futures contracts on equities (3)
Derivatives, Fair Value [Line Items]
Fair Value, Liability	[2]	(12)	0
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Other
Derivatives, Fair Value [Line Items]
Fair Value, Liability		0	0
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Other Derivative Instruments [Member]
Derivatives, Fair Value [Line Items]
Fair Value, Liability		(12)	0
Balance Sheet Location Accounts Payable Future Policy Benefits [Member] | Guaranteed Minimum Income Benefit [Member]
Derivatives, Fair Value [Line Items]
Fair Value, Liability	[3]	$ (741)	$ (861)

[1] Includes fair value of embedded derivatives.

[2] Related to GMDB and GLB blocks of business.

[3] Includes both future policy benefits reserves and fair value derivative adjustment. Note that the payment provision related to GLB is the net amount at risk. The concept of a notional value does not apply to the GLB reinsurance contracts.

XML

Commitments, Contingencies, And Guarantees (Net Realized Gains (Losses) Of Derivative Instrument Activity In Consolidated Statement Of Operations) (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019		Mar. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative		$ (80)		$ 79
Foreign currency forward contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative		(15)		4
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative		(80)		0
All Other Futures Contracts, Options and equities [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative		(36)		13
Convertible securities (1)
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative		1	[1]	0
Total investment and embedded derivative instruments
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative		(130)		17
GLB (2)
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative	[2]	114		38
Futures contracts on equities (3)
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative	[3]	(63)		22
Other
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative		(1)		2
Guaranteed Living Benefit And Other Derivative Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative		$ 50		$ 62

[1] Includes embedded derivatives.

[2] Excludes foreign exchange gains (losses) related to GLB.

[3] Related to GMDB and GLB blocks of business.

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Commitments, contingencies, and guarantees Commitments, Contingencies, And Guarantees (Transactions accounted for as secured borrowings) (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending collateral	$ 1,861	$ 1,926
Securities lending payable	1,861	1,926
Cash [Member] | Overnight and Continuous [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending collateral	846	756
U.S. Treasury and agency | Overnight and Continuous [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending collateral	60	64
Foreign [Member] | Overnight and Continuous [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending collateral	655	795
Corporate securities | Overnight and Continuous [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending collateral	29	15
Mortgage-backed securities | Overnight and Continuous [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending collateral	47	45
Equity Securities [Member] | Overnight and Continuous [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending collateral	$ 224	$ 251

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Commitments, contingencies, and guarantees Commitments, Contingencies, And Guarantees (Collateral pledged under repurchase agreements) (Details) - USD ($) $ in Millions		Mar. 31, 2019	Dec. 31, 2018
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Assets pledged under repurchase agreements		$ 1,478	$ 1,468
Repurchase agreements		1,419	1,418
U.S. Treasury and agency
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Assets pledged under repurchase agreements		264	259
Mortgage-backed securities
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Assets pledged under repurchase agreements		1,214	1,209
Repurchase Agreements [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Secured Borrowings, Gross, Difference, Amount	[1]	59	50
Maturity Less than 30 Days [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Assets pledged under repurchase agreements		585
Maturity Less than 30 Days [Member] | U.S. Treasury and agency
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Assets pledged under repurchase agreements		255
Maturity Less than 30 Days [Member] | Mortgage-backed securities
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Assets pledged under repurchase agreements		330
Maturity Greater than 90 Days [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Assets pledged under repurchase agreements		893	972
Maturity Greater than 90 Days [Member] | U.S. Treasury and agency
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Assets pledged under repurchase agreements		9	259
Maturity Greater than 90 Days [Member] | Mortgage-backed securities
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Assets pledged under repurchase agreements		$ 884	713
Maturity 30 to 90 Days [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Assets pledged under repurchase agreements			496
Maturity 30 to 90 Days [Member] | U.S. Treasury and agency
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Assets pledged under repurchase agreements			0
Maturity 30 to 90 Days [Member] | Mortgage-backed securities
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Assets pledged under repurchase agreements			$ 496

[1] Per the repurchase agreements, the amount of collateral posted is required to exceed the amount of gross liability.

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Share-Based Compensation (Detail) - $ / shares		3 Months Ended
	Feb. 28, 2019	Mar. 31, 2019
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period in years		3 years
Award term period in years		10 years
Stock options granted	2,073,712
Weighted-average grant date fair value for stock options granted	$ 18.79
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period in years		4 years
Restricted stock awards granted to employees and officers of the company	1,078,247
Grant date fair value of awards except for options granted to employees and officers of the company	$ 133.90
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period in years		3 years
Restricted stock awards granted to employees and officers of the company	212,059
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards granted to employees and officers of the company	357,463

XML

Shareholders' equity (Details) - SFr / shares	Mar. 31, 2019	Dec. 31, 2018
Stockholders' Equity Note [Abstract]
Common Shares, par value	SFr 24.15	SFr 24.15
Common Shares in treasury, shares	21,604,659	20,580,486

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Shareholders' equity Dividends Declared (Details)	3 Months Ended
	Mar. 31, 2019 $ / shares	Mar. 31, 2019 SFr / shares	Mar. 31, 2018 $ / shares	Mar. 31, 2018 SFr / shares	May 31, 2018 $ / shares	May 31, 2017 $ / shares
Equity, Class of Treasury Stock [Line Items]
Annual dividend per share approved by shareholders					$ 2.92	$ 2.84
Common Stock, Dividend Rate Approved					$ 0.73	$ 0.71
United States of America, Dollars
Equity, Class of Treasury Stock [Line Items]
Common Stock, Dividends, Per Share, Declared	$ 0.73		$ 0.71
Switzerland, Francs
Equity, Class of Treasury Stock [Line Items]
Common Stock, Dividends, Per Share, Declared | SFr / shares		SFr 0.72		SFr 0.66

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Shareholders' equity Share Repurchases (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	May 01, 2019	Mar. 31, 2019	Mar. 31, 2018	Dec. 01, 2018	Dec. 21, 2017
2019 Stock Repurchase Plan [Member]
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Authorized Amount				$ 1,500
Number of shares repurchased		2,753,754
Cost of shares repurchased		$ 367
Repurchase authorization remaining at end of period		$ 1,112
2018 Stock Repurchase Plan [Member]
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Authorized Amount					$ 1,000
Number of shares repurchased			0
Cost of shares repurchased			$ 0
Repurchase authorization remaining at end of period			$ 1,000
Subsequent Event [Member] | 2019 Stock Repurchase Plan [Member]
Equity, Class of Treasury Stock [Line Items]
Number of shares repurchased	550,000
Cost of shares repurchased	$ 77
Repurchase authorization remaining at end of period	$ 1,035

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Postretirement benefits Components of net periodic benefit costs (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans
Service cost	$ 15	$ 17
Non-service (benefit) cost	(21)	(33)
Net periodic (benefit) cost	(6)	(16)
Pension Plan [Member] | Non-US [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans
Service cost	3	3
Interest cost	7	7
Expected return on plan assets	(11)	(13)
Amortization of prior service cost	0	0
Non-service (benefit) cost	(4)	(6)
Net periodic (benefit) cost	(1)	(3)
Pension Plan [Member] | UNITED STATES
Defined Benefit Plans and Other Postretirement Benefit Plans
Service cost	12	14
Interest cost	30	26
Expected return on plan assets	(47)	(53)
Amortization of prior service cost	0	0
Non-service (benefit) cost	(17)	(27)
Net periodic (benefit) cost	(5)	(13)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans
Service cost	0	0
Interest cost	1	1
Expected return on plan assets	(1)	(1)
Amortization of prior service cost	(20)	(21)
Non-service (benefit) cost	(20)	(21)
Net periodic (benefit) cost	(20)	(21)
Losses and loss expenses | Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans
Service cost	2	2
Non-service (benefit) cost	(2)	(3)
Losses and loss expenses | Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans
Service cost	0	0
Non-service (benefit) cost	(2)	(1)
Administrative Expense | Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans
Service cost	13	15
Non-service (benefit) cost	(19)	(30)
Administrative Expense | Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans
Service cost	0	0
Non-service (benefit) cost	$ (18)	$ (20)

XML

Segment information Segment Information (narrative Detail (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Gain (Loss) on Derivative	$ (80)	$ 79
Net investment income	836	806
North America Agricultural Insurance [Member]
Segment Reporting Information [Line Items]
Segment Income Loss Including Gains Losses On Crop Derivatives	73
Gain (Loss) on Derivative	(1)
Net investment income	10	7
Segment Life [Member]
Segment Reporting Information [Line Items]
Net investment income	89	$ 83
Management Underwriting Income (Loss)	75
Gains(Losses) On Fair Value Changes In Separate Account Assets	$ 30

XML

Segment Information (Operations By Segment) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Net premiums written	$ 7,313	$ 7,104
Net premiums earned	7,137	7,027
Losses and loss expenses	4,098	4,102
Policy benefits	196	151
Policy acquisition costs	1,464	1,464
Administrative expenses	710	692
Underwriting income (loss)	669	618
Net investment income (loss)	836	806
Other (income) expense	(39)	(47)
Amortization of purchased intangibles	76	85
Segment Income (loss)	1,468	1,386
Net Realized Gains Losses	(97)	(2)
Interest expense	140	157
Chubb integration expenses	3	10
Income tax expense	188	135
Net income	1,040	1,082
North America Commercial P&C Insurance [Member]
Segment Reporting Information [Line Items]
Net premiums written	2,951	2,812
Net premiums earned	3,085	3,029
Losses and loss expenses	1,973	1,908
Policy benefits	0	0
Policy acquisition costs	459	472
Administrative expenses	240	231
Underwriting income (loss)	413	418
Net investment income (loss)	510	503
Other (income) expense	(5)	(6)
Amortization of purchased intangibles	0	0
Segment Income (loss)	928	927
North America Personal P&C Insurance [Member]
Segment Reporting Information [Line Items]
Net premiums written	1,056	1,048
Net premiums earned	1,154	1,140
Losses and loss expenses	757	886
Policy benefits	0	0
Policy acquisition costs	231	237
Administrative expenses	68	65
Underwriting income (loss)	98	(48)
Net investment income (loss)	64	59
Other (income) expense	0	0
Amortization of purchased intangibles	3	3
Segment Income (loss)	159	8
North America Agricultural Insurance [Member]
Segment Reporting Information [Line Items]
Net premiums written	130	108
Net premiums earned	55	43
Losses and loss expenses	(27)	(53)
Policy benefits	0	0
Policy acquisition costs	7	(1)
Administrative expenses	1	(3)
Underwriting income (loss)	74	100
Net investment income (loss)	10	7
Other (income) expense	0	0
Amortization of purchased intangibles	7	7
Segment Income (loss)	77	100
Overseas General Insurance [Member]
Segment Reporting Information [Line Items]
Net premiums written	2,395	2,384
Net premiums earned	2,114	2,107
Losses and loss expenses	1,106	1,078
Policy benefits	0	0
Policy acquisition costs	596	588
Administrative expenses	249	239
Underwriting income (loss)	163	202
Net investment income (loss)	144	151
Other (income) expense	4	7
Amortization of purchased intangibles	11	10
Segment Income (loss)	292	336
Global Reinsurance [Member]
Segment Reporting Information [Line Items]
Net premiums written	202	193
Net premiums earned	168	168
Losses and loss expenses	76	67
Policy benefits	0	0
Policy acquisition costs	43	40
Administrative expenses	10	10
Underwriting income (loss)	39	51
Net investment income (loss)	56	64
Other (income) expense	(9)	(7)
Amortization of purchased intangibles	0	0
Segment Income (loss)	104	122
Life Insurance [Member]
Segment Reporting Information [Line Items]
Net premiums written	579	559
Net premiums earned	561	540
Losses and loss expenses	202	205
Policy benefits	196	151
Policy acquisition costs	128	128
Administrative expenses	79	78
Underwriting income (loss)	(44)	(22)
Net investment income (loss)	89	83
Other (income) expense	(40)	(4)
Amortization of purchased intangibles	0	1
Segment Income (loss)	85	64
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Net premiums written	0	0
Net premiums earned	0	0
Losses and loss expenses	11	11
Policy benefits	0	0
Policy acquisition costs	0	0
Administrative expenses	63	72
Underwriting income (loss)	(74)	(83)
Net investment income (loss)	(37)	(61)
Other (income) expense	11	(37)
Amortization of purchased intangibles	55	64
Segment Income (loss)	(177)	(171)
Net Realized Gains Losses	(97)	(2)
Interest expense	140	157
Chubb integration expenses	3	10
Income tax expense	188	135
Net income	$ (605)	$ (475)

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Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share [Abstract]
Net income	$ 1,040	$ 1,082
Weighted-average shares outstanding	458,805,185	465,703,240
Share-based compensation plans	2,731,755	3,770,351
Weighted-average shares outstanding and assumed conversions	461,536,940	469,473,591
Basic earnings per share (US$ per share)	$ 2.27	$ 2.32
Diluted earnings per share (US$ per share)	$ 2.25	$ 2.30
Potential anti-dilutive share conversions	4,343,204	2,116,188

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Information provided in connection with outstanding debt of subsidiaries Information provided in connection with outstanding debt of subsidiaries (Narrative) (Details)	Mar. 31, 2019
Information Provided In Connection With Outstanding Debt Of Subsidiaries [Abstract]
Equity Method Investment, Ownership Percentage	100.00%

XML

Information Provided In Connection With Outstanding Debt Of Subsidiaries (Condensed Consolidating Balance Sheet) (Detail) - USD ($) $ in Millions		Mar. 31, 2019		Dec. 31, 2018		Mar. 31, 2018	Dec. 31, 2017
Condensed Balance Sheet Statements, Captions [Line Items]
Investments		$ 103,260		$ 100,968
Cash		1,271	[1]	1,247	[2]
Restricted cash	[1]	122		93
Insurance and reinsurance balances receivable		9,826		10,075
Reinsurance recoverable on losses and loss expenses		16,137		15,993
Reinsurance recoverable on policy benefits		203		202
Value of business acquired		289		295
Goodwill and other intangible assets		21,419		21,414
Investments in subsidiaries		0		0
Due from subsidiaries and affiliates, net		0		0
Other assets		18,820		17,484
Total assets		171,347		167,771
Unpaid losses and loss expenses		63,143		62,960		$ 63,139	$ 63,179
Unearned premiums		15,909		15,532
Future policy benefits		5,552		5,506
Due to subsidiaries and affiliates, net		0		0
Affiliated notional cash pooling programs		0		0
Repurchase agreements		1,419		1,418
Short-term debt		509		509
Long-term debt		12,071		12,087
Trust preferred securities		308		308
Other liabilities		20,081		19,139
Total liabilities		118,992		117,459
Total shareholders' equity		52,355		50,312		$ 51,287
Total liabilities and shareholders’ equity		171,347		167,771
Chubb Limited (Parent Guarantor)
Condensed Balance Sheet Statements, Captions [Line Items]
Investments		0		0
Cash		2	[1]	1	[2]
Restricted cash	[1]	0		0
Insurance and reinsurance balances receivable		0		0
Reinsurance recoverable on losses and loss expenses		0		0
Reinsurance recoverable on policy benefits		0		0
Value of business acquired		0		0
Goodwill and other intangible assets		0		0
Investments in subsidiaries		45,648		43,531
Due from subsidiaries and affiliates, net		7,358		7,074
Other assets		9		3
Total assets		53,017		50,609
Unpaid losses and loss expenses		0		0
Unearned premiums		0		0
Future policy benefits		0		0
Due to subsidiaries and affiliates, net		0		0
Affiliated notional cash pooling programs		331	[1]	35	[2]
Repurchase agreements		0		0
Short-term debt		0		0
Long-term debt		0		0
Trust preferred securities		0		0
Other liabilities		331		262
Total liabilities		662		297
Total shareholders' equity		52,355		50,312
Total liabilities and shareholders’ equity		53,017		50,609
Chubb INA Holdings Inc (Subsidiary Issuer)
Condensed Balance Sheet Statements, Captions [Line Items]
Investments		229		214
Cash		71	[1]	2	[2]
Restricted cash	[1]	0		0
Insurance and reinsurance balances receivable		0		0
Reinsurance recoverable on losses and loss expenses		0		0
Reinsurance recoverable on policy benefits		0		0
Value of business acquired		0		0
Goodwill and other intangible assets		0		0
Investments in subsidiaries		51,996		50,209
Due from subsidiaries and affiliates, net		0		0
Other assets		488		1,007
Total assets		52,784		51,432
Unpaid losses and loss expenses		0		0
Unearned premiums		0		0
Future policy benefits		0		0
Due to subsidiaries and affiliates, net		7,974		7,672
Affiliated notional cash pooling programs		691	[1]	617	[2]
Repurchase agreements		0		0
Short-term debt		500		500
Long-term debt		12,070		12,086
Trust preferred securities		308		308
Other liabilities		1,894		2,545
Total liabilities		23,437		23,728
Total shareholders' equity		29,347		27,704
Total liabilities and shareholders’ equity		52,784		51,432
Other Chubb Limited Subsidiaries
Condensed Balance Sheet Statements, Captions [Line Items]
Investments		103,031		100,754
Cash		2,220	[1]	1,896	[2]
Restricted cash	[1]	122		93
Insurance and reinsurance balances receivable		11,491		11,861
Reinsurance recoverable on losses and loss expenses		26,232		26,422
Reinsurance recoverable on policy benefits		306		306
Value of business acquired		289		295
Goodwill and other intangible assets		21,419		21,414
Investments in subsidiaries		0		0
Due from subsidiaries and affiliates, net		616		598
Other assets		20,170		18,102
Total assets		185,896		181,741
Unpaid losses and loss expenses		72,998		72,857
Unearned premiums		17,039		16,611
Future policy benefits		5,655		5,610
Due to subsidiaries and affiliates, net		0		0
Affiliated notional cash pooling programs		0	[1]	0	[2]
Repurchase agreements		1,419		1,418
Short-term debt		9		9
Long-term debt		1		1
Trust preferred securities		0		0
Other liabilities		20,478		19,199
Total liabilities		117,599		115,705
Total shareholders' equity		68,297		66,036
Total liabilities and shareholders’ equity		185,896		181,741
Consolidating Adjustments and Eliminations
Condensed Balance Sheet Statements, Captions [Line Items]
Investments		0		0
Cash		(1,022)	[1]	(652)	[2]
Restricted cash	[1]	0		0
Insurance and reinsurance balances receivable		(1,665)		(1,786)
Reinsurance recoverable on losses and loss expenses		(10,095)		(10,429)
Reinsurance recoverable on policy benefits		(103)		(104)
Value of business acquired		0		0
Goodwill and other intangible assets		0		0
Investments in subsidiaries		(97,644)		(93,740)
Due from subsidiaries and affiliates, net		(7,974)		(7,672)
Other assets		(1,847)		(1,628)
Total assets		(120,350)		(116,011)
Unpaid losses and loss expenses		(9,855)		(9,897)
Unearned premiums		(1,130)		(1,079)
Future policy benefits		(103)		(104)
Due to subsidiaries and affiliates, net		(7,974)		(7,672)
Affiliated notional cash pooling programs		(1,022)	[1]	(652)	[2]
Repurchase agreements		0		0
Short-term debt		0		0
Long-term debt		0		0
Trust preferred securities		0		0
Other liabilities		(2,622)		(2,867)
Total liabilities		(22,706)		(22,271)
Total shareholders' equity		(97,644)		(93,740)
Total liabilities and shareholders’ equity		$ (120,350)		$ (116,011)

[1] Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Various Chubb entities participate in one or the other of the Pools, pursuant to which credit and debit balances in individual Chubb accounts are translated daily into a single currency and pooled on a notional basis. Individual Chubb entities are permitted to overdraw on their individual accounts provided the overall Pool balances do not fall below zero. At March 31, 2019, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[2] Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Various Chubb entities participate in one or the other of the Pools, pursuant to which credit and debit balances in individual Chubb accounts are translated daily into a single currency and pooled on a notional basis. Individual Chubb entities are permitted to overdraw on their individual accounts provided the overall Pool balances do not fall below zero. At December 31, 2018, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

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Information Provided In Connection With Outstanding Debt Of Subsidiaries (Condensed Consolidating Statement Of Operations) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Condensed Statement of Income Captions [Line Items]
Net premiums written	$ 7,313	$ 7,104
Net premiums earned	7,137	7,027
Net investment income	836	806
Equity In Earnings Of Subsidiaries	0	0
Net Realized Gains Losses	(97)	(2)
Losses and loss expenses	4,098	4,102
Policy benefits	196	151
Policy acquisition costs and administrative expenses	2,174	2,156
Interest (income) expense	140	157
Other (income) expense	(39)	(47)
Amortization of purchased intangibles	76	85
Chubb integration expenses	3	10
Income tax expense	188	135
Net income	1,040	1,082
Comprehensive income (loss)	2,718	453
Consolidating Adjustments and Eliminations
Condensed Statement of Income Captions [Line Items]
Net premiums written	0	0
Net premiums earned	0	0
Net investment income	0	0
Equity In Earnings Of Subsidiaries	(1,749)	(1,907)
Net Realized Gains Losses	0	0
Losses and loss expenses	0	0
Policy benefits	0	0
Policy acquisition costs and administrative expenses	0	0
Interest (income) expense	0	0
Other (income) expense	0	0
Amortization of purchased intangibles	0	0
Chubb integration expenses	0	0
Income tax expense	0	0
Net income	(1,749)	(1,907)
Comprehensive income (loss)	(4,729)	(830)
Chubb Limited (Parent Guarantor)
Condensed Statement of Income Captions [Line Items]
Net premiums written	0	0
Net premiums earned	0	0
Net investment income	1	2
Equity In Earnings Of Subsidiaries	990	1,022
Net Realized Gains Losses	1	(2)
Losses and loss expenses	0	0
Policy benefits	0	0
Policy acquisition costs and administrative expenses	20	18
Interest (income) expense	(66)	(80)
Other (income) expense	(6)	(5)
Amortization of purchased intangibles	0	0
Chubb integration expenses	0	2
Income tax expense	4	5
Net income	1,040	1,082
Comprehensive income (loss)	2,718	453
Chubb INA Holdings Inc (Subsidiary Issuer)
Condensed Statement of Income Captions [Line Items]
Net premiums written	0	0
Net premiums earned	0	0
Net investment income	(4)	4
Equity In Earnings Of Subsidiaries	759	885
Net Realized Gains Losses	(13)	(24)
Losses and loss expenses	0	0
Policy benefits	0	0
Policy acquisition costs and administrative expenses	(15)	22
Interest (income) expense	185	209
Other (income) expense	3	8
Amortization of purchased intangibles	0	0
Chubb integration expenses	2	1
Income tax expense	(42)	(59)
Net income	609	684
Comprehensive income (loss)	1,941	216
Other Chubb Limited Subsidiaries
Condensed Statement of Income Captions [Line Items]
Net premiums written	7,313	7,104
Net premiums earned	7,137	7,027
Net investment income	839	800
Equity In Earnings Of Subsidiaries	0	0
Net Realized Gains Losses	(85)	24
Losses and loss expenses	4,098	4,102
Policy benefits	196	151
Policy acquisition costs and administrative expenses	2,169	2,116
Interest (income) expense	21	28
Other (income) expense	(36)	(50)
Amortization of purchased intangibles	76	85
Chubb integration expenses	1	7
Income tax expense	226	189
Net income	1,140	1,223
Comprehensive income (loss)	$ 2,788	$ 614

XML

Information Provided In Connection With Outstanding Debt Of Subsidiaries (Condensed Consolidating Statement Of Cash Flows) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019		Mar. 31, 2018
Condensed Cash Flow Statements, Captions [Line Items]
Net cash flows from operating activities	$ 1,322		$ 551
Purchases of fixed maturities available for sale	(5,561)		(5,972)
Purchases of fixed maturities held to maturity	(1)		(162)
Purchases of equity securities	(49)		(55)
Sales of fixed maturities available for sale	3,287		2,562
Proceeds From Sale Of Available For Sale Securities Debt Condensed	3,293
Sales of equity securities	60		40
Maturities and redemptions of fixed maturities available for sale	1,831		1,865
Maturities and redemptions of fixed maturities held to maturity	280		255
Net change in short-term investments	(39)		731
Net derivative instruments settlements	(358)		39
Private equity contribution	(410)		(353)
Private equity distribution	368		201
Capital contribution	0		0
Other	(87)		(32)
Net cash flows used for investing activities	(673)		(881)
Dividends paid on Common Shares	(336)		(330)
Common Shares repurchased	(367)		(29)
Proceeds from Issuance of Long-term Debt	0		2,175
Proceeds from issuance of long-term debt	0		(300)
Proceeds from issuance of repurchase agreements	471		408
Repayments of repurchase agreements	(470)		(404)
Proceeds from share-based compensation plans	35		34
Dividend to Parent Company	0		0
Advances (to) from affiliates	0		0
Capital contribution	0		0
Net proceeds from (payments to) affiliated notional cash pooling program	0		0
Policyholder contract deposits	115		118
Policyholder contract withdrawals	(78)		(105)
Net cash flows (used for) from financing activities	(630)		1,567
Effect of foreign currency rate changes on cash and restricted cash	34		25
Net Increase (Decrease) in cash and restricted cash	53		1,262
Cash and Restricted Cash - Beginning of year	1,340		851
Cash and Restricted Cash - end of Year	1,393		2,113
Chubb Limited (Parent Guarantor)
Condensed Cash Flow Statements, Captions [Line Items]
Net cash flows from operating activities	307		24
Purchases of fixed maturities available for sale	0		0
Purchases of fixed maturities held to maturity	0		0
Purchases of equity securities	0		0
Sales of fixed maturities available for sale			0
Proceeds From Sale Of Available For Sale Securities Debt Condensed	0
Sales of equity securities	0		0
Maturities and redemptions of fixed maturities available for sale	0		0
Maturities and redemptions of fixed maturities held to maturity	0		0
Net change in short-term investments	0		0
Net derivative instruments settlements	0		0
Private equity contribution	0		0
Private equity distribution	0		0
Capital contribution	0		(750)
Other	0		0
Net cash flows used for investing activities	0		(750)
Dividends paid on Common Shares	(336)		(330)
Common Shares repurchased	0		0
Proceeds from Issuance of Long-term Debt			0
Proceeds from issuance of long-term debt			0
Proceeds from issuance of repurchase agreements	0		0
Repayments of repurchase agreements	0		0
Proceeds from share-based compensation plans	0		0
Dividend to Parent Company	0		0
Advances (to) from affiliates	(266)		656
Capital contribution	0		0
Net proceeds from (payments to) affiliated notional cash pooling program	296	[1]	400	[2]
Policyholder contract deposits	0		0
Policyholder contract withdrawals	0		0
Net cash flows (used for) from financing activities	(306)		726
Effect of foreign currency rate changes on cash and restricted cash	0		(2)
Net Increase (Decrease) in cash and restricted cash	1		(2)
Cash and Restricted Cash - Beginning of year	1		3
Cash and Restricted Cash - end of Year	2		1
Chubb INA Holdings Inc (Subsidiary Issuer)
Condensed Cash Flow Statements, Captions [Line Items]
Net cash flows from operating activities	(163)		2,727
Purchases of fixed maturities available for sale	(3)		(8)
Purchases of fixed maturities held to maturity	0		0
Purchases of equity securities	0		0
Sales of fixed maturities available for sale			0
Proceeds From Sale Of Available For Sale Securities Debt Condensed	0
Sales of equity securities	0		0
Maturities and redemptions of fixed maturities available for sale	6		3
Maturities and redemptions of fixed maturities held to maturity	0		0
Net change in short-term investments	(3)		(14)
Net derivative instruments settlements	(28)		(7)
Private equity contribution	0		0
Private equity distribution	0		0
Capital contribution	(110)		(3,500)
Other	(12)		(3)
Net cash flows used for investing activities	(150)		(3,529)
Dividends paid on Common Shares	0		0
Common Shares repurchased	0		0
Proceeds from Issuance of Long-term Debt			2,175
Proceeds from issuance of long-term debt			(300)
Proceeds from issuance of repurchase agreements	0		0
Repayments of repurchase agreements	0		0
Proceeds from share-based compensation plans	0		0
Dividend to Parent Company	0		0
Advances (to) from affiliates	308		(95)
Capital contribution	0		0
Net proceeds from (payments to) affiliated notional cash pooling program	74	[1]	(115)	[2]
Policyholder contract deposits	0		0
Policyholder contract withdrawals	0		0
Net cash flows (used for) from financing activities	382		1,665
Effect of foreign currency rate changes on cash and restricted cash	0		0
Net Increase (Decrease) in cash and restricted cash	69		863
Cash and Restricted Cash - Beginning of year	2		1
Cash and Restricted Cash - end of Year	71		864
Other Chubb Limited Subsidiaries
Condensed Cash Flow Statements, Captions [Line Items]
Net cash flows from operating activities	1,378		800
Purchases of fixed maturities available for sale	(5,558)		(5,964)
Purchases of fixed maturities held to maturity	(1)		(162)
Purchases of equity securities	(49)		(55)
Sales of fixed maturities available for sale			2,562
Proceeds From Sale Of Available For Sale Securities Debt Condensed	3,293
Sales of equity securities	60		40
Maturities and redemptions of fixed maturities available for sale	1,825		1,862
Maturities and redemptions of fixed maturities held to maturity	280		255
Net change in short-term investments	(36)		745
Net derivative instruments settlements	(330)		46
Private equity contribution	(410)		(353)
Private equity distribution	368		201
Capital contribution	0		0
Other	(75)		(29)
Net cash flows used for investing activities	(633)		(852)
Dividends paid on Common Shares	0		0
Common Shares repurchased	(367)		(29)
Proceeds from Issuance of Long-term Debt			0
Proceeds from issuance of long-term debt			0
Proceeds from issuance of repurchase agreements	471		408
Repayments of repurchase agreements	(470)		(404)
Proceeds from share-based compensation plans	35		34
Dividend to Parent Company	(200)		(3,000)
Advances (to) from affiliates	(42)		(561)
Capital contribution	110		4,250
Net proceeds from (payments to) affiliated notional cash pooling program	0	[1]	0	[2]
Policyholder contract deposits	115		118
Policyholder contract withdrawals	(78)		(105)
Net cash flows (used for) from financing activities	(426)		711
Effect of foreign currency rate changes on cash and restricted cash	34		27
Net Increase (Decrease) in cash and restricted cash	353		686
Cash and Restricted Cash - Beginning of year	1,989		962
Cash and Restricted Cash - end of Year	2,342		1,648
Consolidation, Eliminations [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash flows from operating activities	(200)		(3,000)
Purchases of fixed maturities available for sale	0		0
Purchases of fixed maturities held to maturity	0		0
Purchases of equity securities	0		0
Sales of fixed maturities available for sale			0
Proceeds From Sale Of Available For Sale Securities Debt Condensed	0
Sales of equity securities	0		0
Maturities and redemptions of fixed maturities available for sale	0		0
Maturities and redemptions of fixed maturities held to maturity	0		0
Net change in short-term investments	0		0
Net derivative instruments settlements	0		0
Private equity contribution	0		0
Private equity distribution	0		0
Capital contribution	110		4,250
Other	0		0
Net cash flows used for investing activities	110		4,250
Dividends paid on Common Shares	0		0
Common Shares repurchased	0		0
Proceeds from Issuance of Long-term Debt			0
Proceeds from issuance of long-term debt			0
Proceeds from issuance of repurchase agreements	0		0
Repayments of repurchase agreements	0		0
Proceeds from share-based compensation plans	0		0
Dividend to Parent Company	200		3,000
Advances (to) from affiliates	0		0
Capital contribution	(110)		(4,250)
Net proceeds from (payments to) affiliated notional cash pooling program	(370)	[1]	(285)	[2]
Policyholder contract deposits	0		0
Policyholder contract withdrawals	0		0
Net cash flows (used for) from financing activities	(280)		(1,535)
Effect of foreign currency rate changes on cash and restricted cash	0		0
Net Increase (Decrease) in cash and restricted cash	(370)		(285)
Cash and Restricted Cash - Beginning of year	(652)		(115)
Cash and Restricted Cash - end of Year	$ (1,022)		$ (400)

[1] Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Various Chubb entities participate in one or the other of the Pools, pursuant to which credit and debit balances in individual Chubb accounts are translated daily into a single currency and pooled on a notional basis. Individual Chubb entities are permitted to overdraw on their individual accounts provided the overall Pool balances do not fall below zero. At March 31, 2019 and December 31, 2018, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

[2] Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Various Chubb entities participate in one or the other of the Pools, pursuant to which credit and debit balances in individual Chubb accounts are translated daily into a single currency and pooled on a notional basis. Individual Chubb entities are permitted to overdraw on their individual accounts provided the overall Pool balances do not fall below zero. At March 31, 2018 and December 31, 2017, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.