Accrued investment income

1,927

1,299

1,165

1,086

Insurance and reinsurance balances receivable, net of valuation allowance - $58 and $53

15,709

13,379

Reinsurance recoverable on losses and loss expenses, net of valuation allowance - $388 and $367

^[1]

19,606

19,952

Deferred policy acquisition costs

^[1]

292

280

8,249

7,152

Value of business acquired

3,452

3,674

19,990

^[2]

19,686

Prepaid reinsurance premiums

6,594

6,775

Deferred tax assets

1,567

1,741

3,648

3,221

Other assets (includes VIE balances of $19 and $33)

5,996

5,573

8,461

7,508

Total assets

250,557

230,682

Liabilities

Unpaid losses and loss expenses

84,326

80,122

Unearned premiums

24,498

22,051

Future policy benefits

16,003

13,888

Policyholders' account balances

748

771

8,136

7,462

Separate account liabilities

5,996

5,573

Insurance and reinsurance balances payable

8,696

8,302

Securities lending payable

1,927

1,299

Accounts payable, accrued expenses, and other liabilities (includes VIE balances of $137 and $18)

8,967

8,332

Deferred tax liabilities

1,652

1,555

Repurchase agreements (includes VIE balances of $810 and $1,009)

3,048

2,833

Short-term debt

1,571

1,460

Long-term debt

14,560

13,035

Trust preferred securities

309

308

Total liabilities

180,437

166,991

Commitments and contingencies (refer to Note 13)

Shareholders’ equity

Common Shares (CHF 0.50 par value; 419,625,986 and 431,451,586 shares issued; 403,033,421 and 405,269,637 shares outstanding)

235

241

Common Shares in treasury (16,592,565 and 26,181,949 shares)

(2,837)

(4,400)

Additional paid-in capital

14,643

15,665

Retained earnings

58,986

54,810

Accumulated other comprehensive income (loss) (AOCI)

(5,270)

(6,809)

Total Chubb shareholders’ equity

65,757

59,507

Noncontrolling interests (includes VIE balances of $3,445 and $2,705)

4,363

4,184

Total shareholders' equity

70,120

63,691

Total liabilities and shareholders’ equity

$ 250,557

$ 230,682

[1]	Net of valuation allowance for uncollectible reinsurance.
[2]	Includes $509 million attributable to noncontrolling interests.

Consolidated Balance Sheets (Parentheticals) (Unaudited) $ in Millions	Sep. 30, 2024 USD ($) shares	Dec. 31, 2023 USD ($) shares
Statement of Financial Position [Abstract]
Short-term investments, amortized cost	$ 4,378	$ 4,551
Fixed maturities available-for-sale, valuation allowance	75	156
Fixed maturities available-for-sale, amortized cost	119,441	111,128
Private debt held-to-maturity, valuation allowance	5	4
Restricted cash	153	172
Insurance and reinsurance balances receivable, Allowance for Credit Loss	58	53
Valuation allowance for uncollectible reinsurance	$ 388	$ 367
Common Shares, shares issued \| shares	419,625,986	431,451,586
Common Shares, shares outstanding \| shares	403,033,421	405,269,637
Treasury Stock, Common, Shares \| shares	16,592,565	26,181,949
Short-term investments	$ 4,375	$ 4,551
Equity securities	4,404	3,455
Private equities	14,405	14,078
Other investments	8,155	5,527
Cash, including restricted cash	2,678	2,621
Other assets	8,461	7,508
Repurchase agreements	3,048	2,833
Noncontrolling interests	4,363	4,184
Variable Interest Entity, Primary Beneficiary
Short-term investments	196	217
Equity securities	1,362	1,078
Private equities	22	21
Other investments	4,243	3,773
Cash, including restricted cash	142	117
Other assets	19	33
Other liabilities	137	18
Repurchase agreements	810	1,009
Noncontrolling interests	$ 3,445	$ 2,705

Consolidated Statements Of Operations and Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenues
Net premiums written	$ 13,829	$ 13,104	$ 39,410	$ 35,765
Increase in unearned premiums	(456)	(430)	(2,162)	(1,950)
Net premiums earned	13,373	12,674	37,248	33,815
Net investment income	1,508	1,314	4,367	3,566
Net realized gains (losses)	198	(103)	201	(484)
Market risk benefits gains (losses)	(230)	(32)	(238)	(154)
Total revenues	14,849	13,853	41,578	36,743
Expenses
Losses and loss expenses	7,383	7,106	19,541	17,937
Policy benefits (includes remeasurement gains of $26, $25, $4 and $21)	1,099	938	3,498	2,565
Policy acquisition costs	2,324	2,178	6,757	6,142
Administrative expenses	1,094	1,060	3,258	2,959
Interest expense	192	174	552	499
Other (income) expense	(325)	(154)	(626)	(550)
Amortization of purchased intangibles	81	84	241	226
Integration expenses	7	14	21	51
Total expenses	11,855	11,400	33,242	29,829
Income before income tax	2,994	2,453	8,336	6,914
Income tax expense	504	413	1,336	1,189
Net income	2,490	2,040	7,000	5,725
Net income (loss) attributable to noncontrolling interests	166	(3)	303	(3)
Net income attributable to Chubb	2,324	2,043	6,697	5,728
Other comprehensive income (loss):
Unrealized appreciation (depreciation)	3,459	(2,170)	2,293	(1,578)
Current discount rate on future policy benefits	(672)	683	(672)	497
Instrument-specific credit risk on market risk benefits	(8)	(5)	2	3
Cumulative foreign currency translation adjustment	445	(317)	(5)	(279)
Other, including postretirement benefit liability adjustment	(19)	37	(17)	52
Other comprehensive income (loss), before income tax	3,205	(1,772)	1,601	(1,305)
Income tax expense related to OCI items	150	0	112	104
Other comprehensive income (loss)	3,055	(1,772)	1,489	(1,409)
Comprehensive income	5,545	268	8,489	4,316
Comprehensive income (loss) attributable to noncontrolling interests	187	(79)	253	(79)
Comprehensive income attributable to Chubb	$ 5,358	$ 347	$ 8,236	$ 4,395
Earnings per share
Basic earnings per share attributable to Chubb	$ 5.75	$ 4.99	$ 16.55	$ 13.90
Diluted earnings per share attributable to Chubb	$ 5.70	$ 4.95	$ 16.38	$ 13.79

Consolidated Statements Of Shareholders' Equity (Unaudited) - USD ($) $ in Millions	Total	Common Stock [Member]	Treasury Stock, Common	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest
Noncontrolling interests							$ 0
Balance – beginning of period, net of tax at Dec. 31, 2022		$ 10,346	$ (5,113)	$ 7,166	$ 48,305	$ (10,185)
Par value reduction		(9,759)		(9,759)
Treasury Stock, Retired, Cost Method, Amount		(346)	(2,869)		(2,523)
Common Shares repurchased			(1,758)
Net shares issued under employee share-based compensation plans			(255)
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures				(203)
Exercise of stock options				(15)
Share-based compensation expense				230
Adjustments to Additional Paid in Capital, Other				0
Funding of dividends declared to Retained earnings				(1,050)
Net income attributable to Chubb	$ 5,728				5,728
Funding of dividends declared from Additional paid-in capital					1,050
Dividends declared on Common Shares					(1,050)
Other Comprehensive Income (Loss), Net of Tax	(1,409)					(1,333)
Balance – end of period, net of tax at Sep. 30, 2023	52,373	241	(3,747)	15,887	51,510	(11,518)
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests							5,210
Net income (loss) attributable to noncontrolling interests	(3)						(3)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest							(76)
Other							0
Noncontrolling interests							0
Balance – beginning of period, net of tax at Jun. 30, 2023		241	(3,174)	16,163	49,467	(9,822)
Par value reduction		0		0
Treasury Stock, Retired, Cost Method, Amount		0	0		0
Common Shares repurchased			(606)
Net shares issued under employee share-based compensation plans			(33)
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures				3
Exercise of stock options				(2)
Share-based compensation expense				75
Adjustments to Additional Paid in Capital, Other				0
Funding of dividends declared to Retained earnings				(352)
Net income attributable to Chubb	2,043				2,043
Funding of dividends declared from Additional paid-in capital					352
Dividends declared on Common Shares					(352)
Other Comprehensive Income (Loss), Net of Tax	(1,772)					(1,696)
Balance – end of period, net of tax at Sep. 30, 2023	52,373	241	(3,747)	15,887	51,510	(11,518)
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests							5,210
Net income (loss) attributable to noncontrolling interests	(3)						(3)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest							(76)
Other							0
Noncontrolling interests							5,131
Total shareholders' equity	57,504
Noncontrolling interests	4,184						4,184
Total shareholders' equity	63,691
Balance – beginning of period, net of tax at Dec. 31, 2023	59,507	241	(4,400)	15,665	54,810	(6,809)
Par value reduction		0		0
Treasury Stock, Retired, Cost Method, Amount		(6)	(2,527)		(2,521)
Common Shares repurchased			(1,299)
Net shares issued under employee share-based compensation plans			(335)
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures				(139)
Exercise of stock options				(22)
Share-based compensation expense				258
Adjustments to Additional Paid in Capital, Other				(31)
Funding of dividends declared to Retained earnings				(1,088)
Net income attributable to Chubb	6,697				6,697
Funding of dividends declared from Additional paid-in capital					1,088
Dividends declared on Common Shares					(1,088)
Other Comprehensive Income (Loss), Net of Tax	1,489					1,539
Balance – end of period, net of tax at Sep. 30, 2024	65,757	235	(2,837)	14,643	58,986	(5,270)
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests							(68)
Net income (loss) attributable to noncontrolling interests	303						303
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest							(50)
Other							(6)
Noncontrolling interests							3,537
Balance – beginning of period, net of tax at Jun. 30, 2024		235	(2,481)	14,926	56,662	(8,304)
Par value reduction		0		0
Treasury Stock, Retired, Cost Method, Amount		0	0		0
Common Shares repurchased			(413)
Net shares issued under employee share-based compensation plans			(57)
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures				3
Exercise of stock options				(3)
Share-based compensation expense				86
Adjustments to Additional Paid in Capital, Other				0
Funding of dividends declared to Retained earnings				(369)
Net income attributable to Chubb	2,324				2,324
Funding of dividends declared from Additional paid-in capital					369
Dividends declared on Common Shares					(369)
Other Comprehensive Income (Loss), Net of Tax	3,055					3,034
Balance – end of period, net of tax at Sep. 30, 2024	65,757	$ 235	$ (2,837)	$ 14,643	$ 58,986	$ (5,270)
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests							639
Net income (loss) attributable to noncontrolling interests	166						166
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest							21
Other							0
Noncontrolling interests	4,363						$ 4,363
Total shareholders' equity	$ 70,120

Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash flows from operating activities
Net income	$ 7,000	$ 5,725
Adjustments to reconcile net income to net cash flows from operating activities
Net realized (gains) losses	(201)	484
Market risk benefits (gains) losses	238	154
Amortization of premiums (discounts) on fixed maturities	(271)	(80)
Amortization of purchased intangibles	241	226
Equity in net income (loss) of partially-owned entities	(621)	(610)
Deferred income taxes	150	39
Unpaid losses and loss expenses	4,242	3,270
Unearned premiums	2,563	2,085
Future policy benefits	1,399	570
Insurance and reinsurance balances payable	433	23
Accounts payable, accrued expenses, and other liabilities	(175)	(392)
Income taxes	(129)	(6)
Insurance and reinsurance balances receivable	(2,468)	(1,618)
Reinsurance recoverable	312	(388)
Deferred policy acquisition costs	(1,142)	(832)
Net sales (purchases) of investments by consolidated investment products	(124)	0
Other	170	796
Net cash flows from operating activities	11,617	9,446
Cash flows from investing activities
Purchases of fixed maturities available-for-sale	(26,192)	(21,613)
Purchases of fixed maturities held-to-maturity	0	(208)
Purchases of equity securities	(2,608)	(968)
Sales of fixed maturities available-for-sale	8,829	11,293
Sales of equity securities	1,956	531
Maturities and redemptions of fixed maturities available-for-sale	7,735	5,107
Maturities and redemptions of fixed maturities held-to-maturity	0	708
Net change in short-term investments	158	484
Net derivative instruments settlements	(122)	(56)
Private equity contributions	(733)	(1,313)
Private equity distributions	1,044	938
Acquisition of subsidiaries (net of cash acquired)	(538)	216
Other	(978)	(553)
Net cash flows used for investing activities	(11,449)	(5,434)
Cash flows from financing activities
Proceeds from issuance of long-term debt	2,297	0
Dividends paid on Common Shares	(1,069)	(1,044)
Common Shares repurchased	(1,351)	(1,848)
Proceeds from issuance of repurchase agreements	3,950	3,778
Repayment of long-term debt	(700)	(475)
Repayment of repurchase agreements	(3,838)	(3,832)
Proceeds from share-based compensation plans	302	140
Policyholder contract deposits	818	415
Policyholder contract withdrawals	(534)	(269)
Third-party capital invested into consolidated investment products	1,409	0
Third-party capital distributed by consolidated investment products	(1,118)	0
Other	(228)	(190)
Net cash flows used for financing activities	(62)	(3,325)
Effect of foreign currency rate changes on cash and restricted cash	(49)	(36)
Net increase in cash and restricted cash	57	651
Cash and restricted cash - beginning of period	2,621	2,127
Cash and restricted cash - end of period	2,678	2,778
Supplemental cash flow information
Taxes paid	1,307	1,101
Interest paid	$ 415	$ 345

Consolidated Statements of Operations and Comprehensive Income (Parentheticals) (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Statement [Abstract]
Liability for Future Policy Benefit, Remeasurement Loss (Gain)	$ 26	$ 25	$ 4	$ 21

General and significant accounting policies	9 Months Ended
General and significant accounting policies	Sep. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
General	General and significant accounting policies 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. Our results are reported 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 18 for additional information. The interim unaudited Consolidated Financial Statements include the accounts of Chubb Limited and its subsidiaries (collectively, Chubb, we, us, or our), over which Chubb exercises control, including Huatai Group, our majority-owned subsidiary, and minority-owned entities such as variable interest entities (VIEs) in which Chubb is considered the primary beneficiary. Noncontrolling interests on the Consolidated Financial Statements represent the portion of majority-owned subsidiaries and VIEs in which we do not have direct equity ownership. These interim unaudited Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) and, in the opinion of management, reflect all adjustments 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. On July 1, 2023, Chubb discontinued equity method accounting for its investment in Huatai Group upon obtaining a controlling interest and applied consolidation accounting. Therefore, effective July 1, 2023, business activity for, and the financial position of, Huatai Group is reported at 100 percent on the Consolidated Financial Statements. At September 30, 2024, and December 31, 2023, our aggregate ownership interest in Huatai Group was approximately 85.5 percent and 76.5 percent, respectively. The relevant amounts attributable to shareholders other than Chubb are reflected in the Consolidated Financial Statements under the captions Noncontrolling interests, Net income (loss) attributable to noncontrolling interests, and Comprehensive income (loss) attributable to noncontrolling interests. Refer to Note 2 for additional information on the acquisition of Huatai Group. Huatai Group's life insurance and asset management businesses are included in the Life Insurance segment, and Huatai Group's P&C business is included in the Overseas General Insurance segment. Results for Huatai Group's non-insurance operations, comprising real estate and holding company activity, are included in Corporate. 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 2023 Form 10-K. b) New Accounting Pronouncements Accounting guidance not yet adopted Improvements to Reportable Segment Disclosures In November 2023, the Financial Accounting Standards Board (FASB) issued guidance that requires expanded reportable segment disclosures, primarily related to significant segment expenses which are regularly provided to the chief operating decision maker. The guidance is effective for fiscal years beginning after December 15, 2023, and interim periods within annual periods beginning after December 15, 2024. Retrospective application is required. We are currently evaluating the impact of this disclosure-only requirement. Improvements to Income Tax Disclosures In December 2023, the FASB issued guidance that requires expanded income tax disclosures, including the disaggregation of existing disclosures related to the tax rate reconciliation and income taxes paid. The guidance is effective for annual periods beginning after December 15, 2024. Prospective application is required, with retrospective application permitted. We are currently evaluating the impact of this disclosure-only requirement.

Acquisitions

9 Months Ended

Sep. 30, 2024

Business Combinations [Abstract]

Acquisitions

Healthy Paws

On May 31, 2024, we acquired the business of Healthy Paws Pet Insurance LLC, a managing general agent specializing in pet insurance, from Aon plc for approximately $300 million in cash. We recognized goodwill of $256 million and intangible assets of $44 million from this acquisition. Chubb has been the exclusive underwriter of Healthy Paws since 2013. The transaction positions Chubb to expand in a niche market with substantial growth potential. This business is assigned to the North America Commercial Insurance segment.

Huatai Group

Huatai Insurance Group Co., Ltd. (Huatai Group) is a Chinese financial services holding company and the parent company of, among others, Huatai Property & Casualty Insurance Co., Ltd. (Huatai P&C), Huatai Life Insurance Co., Ltd. (Huatai Life), Huatai Asset Management Co., Ltd., and Huatai Baoxing Fund Management Co., Ltd., of which Huatai Group owns 100 percent, 80 percent, 91 percent, and 85 percent, respectively (collectively, Huatai).

On July 1, 2023, Chubb increased ownership interest from approximately 64.2 percent to approximately 69.6 percent. At that time, Chubb discontinued the equity method of accounting and applied consolidation accounting. Refer to Note 2 to the Consolidated Financial Statements in our 2023 Form 10-K for additional information.

In the first quarter of 2024, we closed on incremental ownership interests of approximately 9.0 percent for $555 million, $319 million of which was paid prior to 2024, and $236 million of which was paid in 2024. Our aggregate ownership interest in Huatai Group was approximately 85.5 percent as of September 30, 2024. In the fourth quarter of 2024, we entered into an agreement to purchase approximately 1.0 percent of incremental ownership interests. Chubb has total outstanding agreements for approximately 1.6 percent of incremental ownership interests, pending completion of certain closing conditions.

The acquisition of a controlling majority interest in Huatai Group on July 1, 2023, generated $3,458 million of Goodwill, attributable to expected growth and profitability, and $1,655 million of Other intangible assets. None of the goodwill is expected to be deductible for income tax purposes. Additionally, the acquisition generated $309 million of Value of business acquired (VOBA). Chubb financed the transaction through available cash on hand. Direct costs related to the acquisition are immaterial, and were expensed as incurred. These include one-time costs that are directly attributable to third-party consulting fees and other professional and legal fees related to the acquisition.

The following table summarizes the fair value of the assets acquired and liabilities assumed on July 1, 2023.


Huatai Group assets and liabilities consolidated	July 1
(in millions of U.S. dollars)	2023
Assets
Investments and Cash	$	13,346
Accrued investment income	60
Insurance and reinsurance balances receivable	277
Reinsurance recoverable on losses and loss expenses	581
Reinsurance recoverable on future policy benefits	27
Value of business acquired	309
Goodwill and intangible assets	5,113
Other assets	748
Total assets	$	20,461
Liabilities
Unpaid losses and loss expenses	$	831
Unearned premiums	800
Future policy benefits	2,351
Policyholders' account balances	4,014
Insurance and reinsurance balances payable	644
Accounts payable, accrued expenses, and other liabilities	682
Deferred tax liabilities	232
Repurchase agreements	1,269
Total liabilities	$	10,823

Net acquired assets, including goodwill, attributable to Chubb	4,428
Net acquired assets, attributable to noncontrolling interests	5,210
Net acquired assets, including goodwill	$	9,638

The following table summarizes the results of the acquired Huatai Group operations that have been included within our Consolidated statements of operations for both the three and nine months ended September 30, 2023:


(in millions of U.S. dollars)
Total revenues	$	389
Net loss	$	(11)
Net loss attributable to Chubb	$	(9)

The following table presents supplemental unaudited pro forma consolidated information for the periods indicated as though the acquisition of a controlling majority interest in Huatai Group that occurred on July 1, 2023, had instead occurred on January 1, 2022. The unaudited pro forma consolidated financial information is presented for informational purposes only and is not necessarily indicative of the operating results that would have occurred had the acquisition of a controlling majority interest been consummated on January 1, 2022, nor is it necessarily indicative of future operating results. Significant assumptions used to determine pro forma operating results include amortization of VOBA and other intangible assets.


	Three Months Ended		Nine Months Ended
Pro forma:	September 30		September 30
(in millions of U.S. dollars)	2023		2023
Net premiums earned	$	12,674	$	34,605
Total revenues	$	13,755	$	37,589
Net income	$	1,905	$	5,595
Net income attributable to Chubb	$	1,912	$	5,587

Investments

9 Months Ended

Sep. 30, 2024

Investments, Debt and Equity Securities [Abstract]

Investments

a) Fixed maturities


September 30, 2024	Amortized Cost		Valuation Allowance		Gross Unrealized Appreciation		Gross Unrealized Depreciation		Fair Value
(in millions of U.S. dollars)
Available-for-sale
U.S. Treasury / Agency	$	2,709	$	—	$	18	$	(98)	$	2,629
Non-U.S.	37,560		(23)		895		(931)		37,501
Corporate and asset-backed securities	47,588		(52)		736		(1,579)		46,693
Mortgage-backed securities	29,517		—		341		(1,384)		28,474
Municipal	2,067		—		18		(117)		1,968
	$	119,441	$	(75)	$	2,008	$	(4,109)	$	117,265


December 31, 2023	Amortized Cost		Valuation Allowance		Gross Unrealized Appreciation		Gross Unrealized Depreciation		Fair Value
(in millions of U.S. dollars)
Available-for-sale
U.S. Treasury / Agency	$	3,721	$	—	$	13	$	(144)	$	3,590
Non-U.S.	35,918		(49)		592		(1,297)		35,164
Corporate and asset-backed securities	44,695		(104)		390		(2,151)		42,830
Mortgage-backed securities	23,720		(3)		143		(1,802)		22,058
Municipal	3,074		—		10		(155)		2,929
	$	111,128	$	(156)	$	1,148	$	(5,549)	$	106,571

The following table presents fixed maturities by contractual maturity:


	September 30, 2024				December 31, 2023
(in millions of U.S. dollars)	Net Carrying Value		Fair Value		Net Carrying Value		Fair Value
Available-for-sale
Due in 1 year or less	$	4,536	$	4,536	$	4,729	$	4,729
Due after 1 year through 5 years	35,739		35,739		33,573		33,573
Due after 5 years through 10 years	28,913		28,913		28,480		28,480
Due after 10 years	19,603		19,603		17,731		17,731
	88,791		88,791		84,513		84,513
Mortgage-backed securities	28,474		28,474		22,058		22,058
	$	117,265	$	117,265	$	106,571	$	106,571

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) Gross unrealized loss

Fixed maturities in an unrealized loss position at September 30, 2024, and December 31, 2023, comprised both investment grade and below investment grade securities for which fair value declined, principally due to rising interest rates since the date of purchase. Refer to Note 1 f) in the 2023 Form 10-K for further information on factors considered in the evaluation of expected credit losses.

The following tables present, for available-for-sale (AFS) fixed maturities in an unrealized loss position (including securities on loan) that are not deemed to have expected credit losses, 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
September 30, 2024	Fair Value		Gross Unrealized Loss		Fair Value		Gross Unrealized Loss		Fair Value		Gross Unrealized Loss
(in millions of U.S. dollars)
U.S. Treasury / Agency	$	—	$	—	$	1,677	$	(98)	$	1,677	$	(98)
Non-U.S.	1,706		(26)		13,628		(734)		15,334		(760)
Corporate and asset-backed securities	1,511		(13)		15,280		(959)		16,791		(972)
Mortgage-backed securities	664		(5)		13,684		(1,366)		14,348		(1,371)
Municipal	35		(1)		1,188		(114)		1,223		(115)
Total AFS fixed maturities	$	3,916	$	(45)	$	45,457	$	(3,271)	$	49,373	$	(3,316)


	0 – 12 Months				Over 12 Months				Total
December 31, 2023	Fair Value		Gross Unrealized Loss		Fair Value		Gross Unrealized Loss		Fair Value		Gross Unrealized Loss
(in millions of U.S. dollars)

U.S. Treasury / Agency	$	463	$	(9)	$	2,504	$	(135)	$	2,967	$	(144)
Non-U.S.	2,464		(43)		15,971		(957)		18,435		(1,000)
Corporate and asset-backed securities	2,866		(51)		20,334		(1,194)		23,200		(1,245)
Mortgage-backed securities	1,659		(58)		13,831		(1,706)		15,490		(1,764)
Municipal	1,117		(15)		1,310		(137)		2,427		(152)
Total AFS fixed maturities	$	8,569	$	(176)	$	53,950	$	(4,129)	$	62,519	$	(4,305)

At September 30, 2024, the tax benefit on certain unrealized losses in our investment portfolio was reduced by a valuation allowance of $157 million necessary due to limitations on the utilization of these losses. As part of evaluating whether it was more likely than not that we could realize these losses, we considered realized gains, carryback ability and available tax planning strategies.

The following table presents a roll-forward of valuation allowance for expected credit losses on fixed maturities:


	Three Months Ended				Nine Months Ended
	September 30				September 30
(in millions of U.S. dollars)	2024		2023		2024		2023
Available-for-sale
Valuation allowance for expected credit losses - beginning of period	$	122	$	193	$	156	$	169


Provision for expected credit loss	23		34		95		172

Write-offs charged against the expected credit loss	(1)		(1)		(6)		(5)

Recovery of expected credit loss	(69)		(68)		(170)		(178)
Valuation allowance for expected credit losses - end of period	$	75	$	158	$	75	$	158
Held-to-maturity
Valuation allowance for expected credit losses - beginning of period	$	—	$	—	$	—	$	34





Recovery of expected credit loss	—		—		—		(34)
Valuation allowance for expected credit losses - end of period	$	—	$	—	$	—	$	—
Private debt held-for-investment
Valuation allowance for expected credit losses - beginning of period	$	5	$	—	$	4	$	—
Provision for expected credit loss	—		—		2		—
Recovery of expected credit loss	—		—		(1)		—
Valuation allowance for expected credit losses - end of period	$	5	$	—	$	5	$	—

c) Net realized gains (losses)

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


	Three Months Ended				Nine Months Ended
	September 30				September 30
(in millions of U.S. dollars)	2024		2023		2024		2023
Fixed maturities:
Gross realized gains	$	21	$	97	$	73	$	116
Gross realized losses	(91)		(184)		(338)		(456)
Other investments - Fixed maturities	152		(1)		452		(1)
Net (provision for) recovery of expected credit losses	48		34		80		44
Impairment (1)	(19)		(16)		(81)		(60)
Total fixed maturities	111		(70)		186		(357)
Equity securities	123		(100)		147		(61)
Private equities (less than 3 percent ownership)	(41)		40		39		75
Foreign exchange	(58)		(67)		(162)		(122)
Investment and embedded derivative instruments	66		9		6		(92)
Other derivative instruments	(2)		(7)		(7)		(6)
Other (2)	(1)		92		(8)		79
Net realized gains (losses) (pre-tax)	$	198	$	(103)	$	201	$	(484)

(1)Relates to certain securities we intended to sell and securities written to market entering default.

(2)The three and nine months ended September 30, 2023 includes a one-time realized gain of $116 million as a result of the consolidation of Huatai Group.

Realized gains and losses from Equity securities, Other investments and Private equities from the table above include sales of securities and unrealized gains and losses from fair value changes as follows:


											Three Months Ended
													September 30
							2024								2023
(in millions of U.S. dollars)	Equity Securities		Other Investments		Private Equities		Total		Equity Securities		Other Investments		Private Equities		Total
Net gains (losses) recognized during the period	$	123	$	152	$	(41)	$	234	$	(100)	$	(1)	$	40	$	(61)
Less: Net gains (losses) recognized from sales of securities	(6)		2		—		(4)		(45)		—		—		(45)
Unrealized gains (losses) recognized for securities still held at reporting date	$	129	$	150	$	(41)	$	238	$	(55)	$	(1)	$	40	$	(16)


													Nine Months Ended
													September 30
							2024								2023
(in millions of U.S. dollars)	Equity Securities		Other Investments		Private Equities		Total		Equity Securities		Other Investments		Private Equities		Total
Net gains (losses) recognized during the period	$	147	$	452	$	39	$	638	$	(61)	$	(1)	$	75	$	13
Less: Net gains (losses) recognized from sales of securities	5		2		—		7		(48)		—		—		(48)
Unrealized gains (losses) recognized for securities still held at reporting date	$	142	$	450	$	39	$	631	$	(13)	$	(1)	$	75	$	61

d) Private equities

Private equities include investment funds and limited partnerships measured at fair value using net asset value (NAV) as a practical expedient. The following table presents, by investment category, the expected liquidation period, fair value, and maximum future funding commitments for private equities:


	Expected Liquidation Period of Underlying Assets	September 30, 2024				December 31, 2023
(in millions of U.S. dollars)		Fair Value		Maximum Future Funding Commitments		Fair Value		Maximum Future Funding Commitments
Financial	2 to 10 Years	$	1,247	$	316	$	1,241	$	364
Real assets	2 to 13 Years	2,006		588		2,137		445
Distressed	2 to 8 Years	1,257		822		1,206		936
Private credit	3 to 8 Years	316		288		331		298
Traditional	2 to 14 Years	9,307		4,767		8,873		4,167
Vintage	1 to 3 Years	59		—		72		—
Investment funds	Not Applicable	213		—		218		—
		$	14,405	$	6,781	$	14,078	$	6,210

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 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 are up to 270 days. Chubb can redeem its investment funds without consent from the investment fund managers.

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 September 30, 2024, and December 31, 2023, are investments, primarily fixed maturities, totaling $19,536 million and $18,242 million, respectively, and cash of $153 million and $172 million, respectively.

The following table presents the components of restricted assets:


	September 30		December 31
(in millions of U.S. dollars)	2024		2023
Trust funds	$	9,137	$	8,482
Assets pledged under repurchase agreements	3,273		2,924
Deposits with U.S. regulatory authorities	2,565		2,544

Deposits with non-U.S. regulatory authorities and other	4,714		4,464

Total	$	19,689	$	18,414

f) Variable interest entities (VIEs)

Consolidated VIEs

Certain subsidiaries of Huatai Group are the investment manager of, and maintain investments in, sponsored investment products that are considered VIEs. We have determined that we are the primary beneficiary and consolidate these investment products if we hold at least 10 percent ownership. Refer to Note 1 g) of our 2023 Form 10-K for further information on our consolidation criteria. The assets of these VIEs are not available to our creditors, and the investors in these VIEs have no recourse to Chubb in excess of the assets contained within the VIEs. Our economic exposures are limited to our investments based on our ownership interest in these VIEs. Our total exposure to these consolidated investment products represents the value of our economic ownership interest.

Unconsolidated VIEs

We do not consolidate sponsored investment products where we have determined that we are not the primary beneficiary. The carrying value of these investments at September 30, 2024, and December 31, 2023, was $110 million and $153 million, respectively, and our maximum risk of loss approximates the carrying amount. These investments are classified within Equity securities on the Consolidated balance sheets.

Fair value measurements

9 Months Ended

Sep. 30, 2024

Fair Value Disclosures [Abstract]

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 U.S. 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 or pricing models, 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) and may require the use of models to be priced. The lack of market-based inputs 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.

Private equities

Fair values for Private equities including investments in partially-owned investment companies, investment funds, and limited partnerships are based on their respective NAV and are excluded from the fair value hierarchy table below.

Other investments

Certain of our long-duration contracts are supported by assets that do not qualify for separate account treatment under U.S. GAAP. These assets primarily 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 principally include fixed maturities carried at fair value with changes in fair value recorded through Net realized gains (losses) on the Consolidated statements of operations. These fixed maturities principally relate to the Huatai investment portfolio, including those portfolios supporting certain participating policies, and are classified within Level 2. Also included are life insurance policies collateralizing investments held in rabbi trusts maintained by Chubb for deferred compensation plans and supplemental retirement plans. These policies are carried at cash surrender value and are classified in the valuation hierarchy within Level 2.

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 derivatives

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. These derivative instruments are recorded in either Other assets or Accounts payable, accrued expenses, and other liabilities in the Consolidated balance sheets.

Derivatives designated as hedging instruments

Certain of our derivatives are cross-currency swaps designated as fair value and net investment hedging instruments. The fair value of cross-currency swaps and interest rate swaps is based on market valuations and is classified within Level 2. These 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 market risk benefits (MRB) claims, and therefore, an increase in MRB reserves. 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 are recorded in either Other assets or Accounts payable, accrued expenses, and other liabilities in the Consolidated balance sheets. Chubb also maintains positions in convertible securities that contain embedded derivatives. Convertible securities are recorded in either Fixed maturities available-for-sale (FM AFS) or Equity securities (ES) and are classified as either Level 1 or Level 2 depending on the underlying investment.

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 principally 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.

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


September 30, 2024	Level 1		Level 2		Level 3		Total
(in millions of U.S. dollars)
Assets:
Fixed maturities available-for-sale
U.S. Treasury / Agency	$	1,979	$	650	$	—	$	2,629
Non-U.S.	—		36,862		639		37,501
Corporate and asset-backed securities	—		43,915		2,778		46,693
Mortgage-backed securities	—		28,428		46		28,474
Municipal	—		1,968		—		1,968
	1,979		111,823		3,463		117,265
Equity securities	4,286		—		118		4,404
Short-term investments	2,491		1,869		15		4,375
Other investments (1)	616		6,424		—		7,040
Securities lending collateral	—		1,927		—		1,927
Investment derivatives	42		—		—		42
Derivatives designated as hedging instruments	—		150		—		150

Separate account assets	5,919		77		—		5,996
Total assets measured at fair value (1)(2)	$	15,333	$	122,270	$	3,596	$	141,199
Liabilities:
Investment derivatives	$	127	$	—	$	—	$	127
Derivatives designated as hedging instruments	—		174		—		174
Other derivative instruments	25		5		—		30
Market risk benefits (3)	—		—		748		748
Total liabilities measured at fair value	$	152	$	179	$	748	$	1,079

(1)Excluded from the table above are other investments of $1,115 million, principally policy loans, measured using NAV as a practical expedient.

(2)Excluded from the table above are private equities of $14,405 million, measured using NAV as a practical expedient.

(3)Refer to Note 11 for additional information on Market risk benefits.


December 31, 2023	Level 1		Level 2		Level 3		Total
(in millions of U.S. dollars)
Assets:
Fixed maturities available-for-sale
U.S. Treasury / Agency	$	2,911	$	679	$	—	$	3,590
Non-U.S.	—		34,472		692		35,164
Corporate and asset-backed securities	—		40,208		2,622		42,830
Mortgage-backed securities	—		22,051		7		22,058
Municipal	—		2,929		—		2,929
	2,911		100,339		3,321		106,571
Equity securities	3,368		—		87		3,455
Short-term investments	1,915		2,633		3		4,551
Other investments (1)	589		4,236		—		4,825
Securities lending collateral	—		1,299		—		1,299
Investment derivatives	54		—		—		54
Derivatives designated as hedging instruments	—		136		—		136

Separate account assets	5,482		91		—		5,573
Total assets measured at fair value (1)(2)	$	14,319	$	108,734	$	3,411	$	126,464
Liabilities:
Investment derivatives	$	136	$	—	$	—	$	136
Derivatives designated as hedging instruments	—		128		—		128
Other derivative instruments	37		5		—		42
Market risk benefits (3)	—		—		771		771
Total liabilities measured at fair value	$	173	$	133	$	771	$	1,077

(1)Excluded from the table above are other investments of $702 million, principally policy loans, measured using NAV as a practical expedient.

(2)Excluded from the table above are private equities of $14,078 million, measured using NAV as a practical expedient.

(3)Refer to Note 11 for additional information on Market risk benefits.

Level 3 financial instruments

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).



Three Months Ended September 30, 2024 (in millions of U.S. dollars)	Available-for-Sale Debt Securities						Equity securities	Short-term investments
	Non-U.S.		Corporate and asset- backed securities		Mortgage-backed securities

Balance, beginning of period	$	632	$	2,709	$	20		$	100	$	12

Transfers out of Level 3	(1)		—		(14)			—		—
Change in Net Unrealized Gains (Losses) in OCI	10		16		—			—		(1)
Net Realized Gains (Losses)	(1)		(10)		—			7		—
Purchases	59		316		40			17		6
Sales	(18)		(69)		—			(6)		(1)
Settlements	(42)		(184)		—			—		(1)

Balance, end of period	$	639	$	2,778	$	46		$	118	$	15
Net Realized Gains (Losses) Attributable to Changes in Fair Value at the Balance Sheet date	$	—	$	(8)	$	—		$	6	$	—
Change in Net Unrealized Gains (Losses) included in OCI at the Balance Sheet date	$	11	$	12	$	—		$	—	$	(1)



Three Months Ended September 30, 2023 (in millions of U.S. dollars)		Available-for-Sale Debt Securities								Equity securities		Short-term investments
	Non-U.S.			Corporate and asset- backed securities			Mortgage-backed securities

Balance, beginning of period		$	649		$	2,524		$	10	$	86	$	3

Transfers out of Level 3		(22)			(10)			—		—		—
Change in Net Unrealized Gains (Losses) in OCI		(6)			6			—		—		—

Net Realized Gains (Losses)		(2)			(4)			—		—		—

Purchases		46			158			16		4		—
Sales		(17)			(40)			—		(5)		(1)
Settlements		(15)			(65)			(1)		—		—
Balance, end of period		$	633		$	2,569		$	25	$	85	$	2
Net Realized Gains (Losses) Attributable to Changes in Fair Value at the Balance Sheet date		$	(1)		$	(4)		$	—	$	—	$	—
Change in Net Unrealized Gains (Losses) included in OCI at the Balance Sheet date		$	(8)		$	4		$	—	$	—	$	—



Nine Months Ended September 30, 2024 (in millions of U.S. dollars)	Available-for-Sale Debt Securities						Equity securities			Short-term investments
	Non-U.S.		Corporate and asset- backed securities		Mortgage-backed securities

Balance, beginning of period	$	692	$	2,622	$	7		$	87		$	3
Transfers into Level 3	1		5		—			—			—
Transfers out of Level 3	(7)		(3)		(14)			—			—
Change in Net Unrealized Gains (Losses) in OCI	18		26		—			—			(2)
Net Realized Gains (Losses)	(5)		(15)		—			6			—
Purchases	214		785		55			36			22
Sales	(69)		(176)		—			(11)			(1)
Settlements	(205)		(466)		(2)			—			(7)

Balance, end of period	$	639	$	2,778	$	46		$	118		$	15
Net Realized Gains (Losses) Attributable to Changes in Fair Value at the Balance Sheet date	$	(1)	$	(10)	$	—		$	5		$	—
Change in Net Unrealized Gains (Losses) included in OCI at the Balance Sheet date	$	14	$	17	$	—		$	—		$	(2)



Nine Months Ended September 30, 2023 (in millions of U.S. dollars)		Available-for-Sale Debt Securities								Equity securities		Short-term investments
	Non-U.S.			Corporate and asset- backed securities			Mortgage-backed securities

Balance, beginning of period		$	564		$	2,449		$	11	$	90	$	3
Transfers into Level 3		21			3			—		—		—
Transfers out of Level 3		(22)			(23)			—		—		—
Change in Net Unrealized Gains (Losses) in OCI		5			8			—		—		(1)
Net Realized Gains (Losses)		(3)			(7)			—		(6)		—

Purchases		151			481			16		15		3
Sales		(52)			(70)			—		(14)		(3)
Settlements		(31)			(272)			(2)		—		—

Balance, end of period		$	633		$	2,569		$	25	$	85	$	2
Net Realized Gains (Losses) Attributable to Changes in Fair Value at the Balance Sheet date		$	(1)		$	(6)		$	—	$	(6)	$	—
Change in Net Unrealized Gains (Losses) included in OCI at the Balance Sheet date		$	1		$	2		$	—	$	—	$	—

Excluded from the tables above is the reconciliation of Market risk benefits, which are presented in Note 11 Market risk benefits. Refer to Note 11 for additional information.

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 2023 Form 10-K for information on the fair value methods and assumptions for private debt held-for-investment, 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:


September 30, 2024	Fair Value								Net Carrying Value
(in millions of U.S. dollars)	Level 1		Level 2		Level 3		Total
Assets:
Private debt held-for-investment	$	—	$	—	$	2,650	$	2,650	$	2,619
Total assets	$	—	$	—	$	2,650	$	2,650	$	2,619
Liabilities:
Repurchase agreements	$	—	$	3,048	$	—	$	3,048	$	3,048
Short-term debt	—		1,560		—		1,560		1,571
Long-term debt	—		13,645		—		13,645		14,560
Trust preferred securities	—		377		—		377		309
Total liabilities	$	—	$	18,630	$	—	$	18,630	$	19,488


December 31, 2023	Fair Value								Net Carrying Value
(in millions of U.S. dollars)	Level 1		Level 2		Level 3		Total
Assets:
Private debt held-for-investment	$	—	$	—	$	2,560	$	2,560	$	2,553
Total assets	$	—	$	—	$	2,560	$	2,560	$	2,553
Liabilities:
Repurchase agreements	$	—	$	2,833	$	—	$	2,833	$	2,833
Short-term debt	—		1,431		—		1,431		1,460
Long-term debt	—		11,924		—		11,924		13,035
Trust preferred securities	—		365		—		365		308
Total liabilities	$	—	$	16,553	$	—	$	16,553	$	17,636

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

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Deferred Policy Acquisition Costs Disclosures [Abstract]

Reinsurance

9 Months Ended

Sep. 30, 2024

Reinsurance Disclosures [Abstract]

Reinsurance [Text Block]

Reinsurance

Reinsurance recoverable on ceded reinsurance


	September 30, 2024				December 31, 2023
(in millions of U.S. dollars)	Net Reinsurance Recoverable (1)		Valuation allowance		Net Reinsurance Recoverable (1)		Valuation allowance
Reinsurance recoverable on unpaid losses and loss expenses	$	17,631	$	307	$	17,884	$	285
Reinsurance recoverable on paid losses and loss expenses	1,975		81		2,068		82
Reinsurance recoverable on losses and loss expenses	$	19,606	$	388	$	19,952	$	367
Reinsurance recoverable on policy benefits	$	292	$	—	$	280	$	—

(1)Net of valuation allowance for uncollectible reinsurance.

The following table presents a roll-forward of valuation allowance for uncollectible reinsurance related to Reinsurance recoverable on losses and loss expenses:


	Nine Months Ended
	September 30
(in millions of U.S. dollars)	2024		2023
Valuation allowance for uncollectible reinsurance - beginning of period	$	367	$	351
Provision for uncollectible reinsurance	24		27
Write-offs charged against the valuation allowance	(4)		(8)
Foreign exchange revaluation	1		—

Valuation allowance for uncollectible reinsurance - end of period	$	388	$	370

For additional information, refer to Note 1 e) to the Consolidated Financial Statements of our 2023 Form 10-K.

Deferred acquisition costs

9 Months Ended

Sep. 30, 2024

Deferred Policy Acquisition Costs

Deferred policy acquisition costs

The following tables present a roll-forward of deferred policy acquisition costs on long-duration contracts included in the Life Insurance segment:


	Nine Months Ended September 30, 2024

(in millions of U.S. dollars)	Term Life		Universal Life		Whole Life		A&H		Other		Total
Balance – beginning of period	$	402	$	674	$	534	$	1,301	$	274	$	3,185

Capitalizations	149		109		276		467		53		1,054
Amortization expense	(89)		(60)		(27)		(132)		(20)		(328)

Other (including foreign exchange)	(1)		(2)		2		(8)		(3)		(12)
Balance – end of period	$	461	$	721	$	785	$	1,628	$	304	$	3,899
Overseas General Insurance segment excluded from table											615
Total deferred policy acquisition costs on long-duration contracts											$	4,514
Deferred policy acquisition costs on short-duration contracts											3,735
Total deferred policy acquisition costs											$	8,249


	Nine Months Ended September 30, 2023

(in millions of U.S. dollars)	Term Life		Universal Life		Whole Life		A&H		Other		Total
Balance – beginning of period	$	324	$	639	$	392	$	891	$	268	$	2,514

Capitalizations	131		85		103		396		27		742
Amortization expense	(76)		(55)		(18)		(98)		(19)		(266)

Other (including foreign exchange)	(2)		(18)		3		(19)		(2)		(38)
Balance – end of period	$	377	$	651	$	480	$	1,170	$	274	$	2,952
Overseas General Insurance segment excluded from table											621
Total deferred policy acquisition costs on long-duration contracts											$	3,573
Deferred policy acquisition costs on short-duration contracts											3,283
Total deferred policy acquisition costs											$	6,856

Goodwill

9 Months Ended

Sep. 30, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets Disclosure [Text Block]

Goodwill

The following table presents a roll-forward of Goodwill by segment:


(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		Chubb Consolidated
Balance at December 31, 2023	$	6,946	$	2,231	$	134	$	5,262	$	371	$	4,742	$	19,686
Acquisition of Healthy Paws	256		—		—		—		—		—		256
Measurement-period adjustments	—		—		—		—		—		65		65
Foreign exchange revaluation	(2)		(1)		—		(43)		—		29		(17)
Balance at September 30, 2024 (1)	$	7,200	$	2,230	$	134	$	5,219	$	371	$	4,836	$	19,990

(1)Includes $509 million attributable to noncontrolling interests.

Unpaid losses and loss expenses, and Future policy benefits

9 Months Ended

Sep. 30, 2024

Liability for Future Policy Benefits and Unpaid 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:


	Nine Months Ended
	September 30
(in millions of U.S. dollars)	2024		2023

Gross unpaid losses and loss expenses – beginning of period	$	80,122	$	75,747
Reinsurance recoverable on unpaid losses and loss expenses – beginning of period (1)	(17,884)		(17,086)
Net unpaid losses and loss expenses – beginning of period	62,238		58,661
Net losses and loss expenses incurred in respect of losses occurring in:
Current year	20,302		18,604
Prior years (2)	(761)		(667)
Total	19,541		17,937
Net losses and loss expenses paid in respect of losses occurring in:
Current year	5,005		4,853
Prior years	10,074		10,158
Total	15,079		15,011
Consolidation of Huatai Group	—		405
Foreign currency revaluation and other	(5)		(95)
Net unpaid losses and loss expenses – end of period	66,695		61,897
Reinsurance recoverable on unpaid losses and loss expenses (1)	17,631		17,808
Gross unpaid losses and loss expenses – end of period	$	84,326	$	79,705

(1) Net of valuation allowance for uncollectible reinsurance.

(2) Relates to prior period loss reserve development only and excludes prior period development related to reinstatement premiums, expense adjustments, earned premiums, and A&H long-duration lines totaling $118 million and $71 million for the nine months ended September 30, 2024 and 2023, respectively.

Net unpaid losses and loss expenses increased $4,457 million for the nine months ended September 30, 2024, principally reflecting underlying exposure growth, net catastrophe losses, and the impact of a reinsurance commutation in connection with a large structured transaction during the first quarter, partially offset by the impact of favorable prior period development. The increase in net unpaid losses also reflected seasonality in our crop insurance business.

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 financial lines; 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 September 30						Nine Months Ended September 30
(in millions of U.S. dollars)	Long-tail		Short-tail		Total		Long-tail		Short-tail		Total
2024
North America Commercial P&C Insurance	$	125	$	(164)	$	(39)	$	79	$	(310)	$	(231)
North America Personal P&C Insurance	—		(189)		(189)		—		(305)		(305)
North America Agricultural Insurance	—		(6)		(6)		—		(34)		(34)
Overseas General Insurance	(61)		1		(60)		(26)		(184)		(210)
Global Reinsurance	(5)		—		(5)		—		(20)		(20)
Corporate	55		—		55		157		—		157
Total	$	114	$	(358)	$	(244)	$	210	$	(853)	$	(643)
2023
North America Commercial P&C Insurance	$	107	$	(191)	$	(84)	$	(23)	$	(279)	$	(302)
North America Personal P&C Insurance	—		(119)		(119)		—		(135)		(135)
North America Agricultural Insurance	—		(9)		(9)		—		(12)		(12)
Overseas General Insurance	(52)		3		(49)		(52)		(201)		(253)
Global Reinsurance	—		—		—		7		(32)		(25)
Corporate	61		—		61		131		—		131
Total	$	116	$	(316)	$	(200)	$	63	$	(659)	$	(596)

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. Net favorable development for the three and nine months ended September 30, 2024, included $164 million and $310 million, respectively, from short-tail lines, primarily property and marine, driven by lower-than-expected loss development in the most recent accident years. The nine months ended September 30, 2024, also included favorable development from surety lines, due to lower-than-expected loss development. Long-tail lines experienced adverse development of $125 million and $79 million for the three and nine months ended September 30, 2024, respectively, which was the net of adverse development in casualty lines, predominantly commercial excess and umbrella and commercial auto liability, due to higher-than-expected loss development, partially offset by favorable development in workers' compensation due to lower-than-expected loss experience and our annual assessment of multi-claimant events, including industrial accidents.

Net favorable development for the three and nine months ended September 30, 2023, included $191 million and $279 million, respectively, from short-tail lines, primarily property and marine lines, mainly due to net lower-than-expected loss development impacting the most recent accident years. Development for the nine months ended September 30, 2023, also included favorable development in surety lines, due to lower-than-expected loss development.

Net adverse development of $107 million for the three months ended September 30, 2023, from long-tail lines included adverse development in casualty lines, predominantly commercial excess and umbrella lines, driven by higher-than-expected loss development, principally related to automobile exposures, partially offset by favorable development in workers' compensation due to lower-than-expected loss experience. Long-tail lines experienced net favorable development of $23 million for the nine months ended September 30, 2023, driven by workers’ compensation lines due to lower-than-expected loss development and our annual assessment of multi-claimant events, including industrial accidents, partially offset by adverse development in commercial excess and umbrella lines and commercial auto liability, both driven by higher-than-expected loss experience.

North America Personal P&C Insurance. Net favorable development for the three and nine months ended September 30, 2024 and 2023, was predominantly in homeowners, mainly due to lower-than-expected loss experience in the most recent accident years.

Overseas General Insurance. Net favorable development for the three months ended September 30, 2024, included $61 million from long-tail lines, primarily financial lines due to favorable loss emergence in accident years 2019 and 2020. Net favorable development for the nine months ended September 30, 2024, included $184 million from short-tail lines, primarily property and marine lines.

Net favorable development for the three and nine months ended September 30, 2023, included $52 million from long-tail lines, primarily financial lines due to favorable loss emergence in accident years 2019 and prior, partially offset by net adverse development in political risks. Net favorable development for the nine months ended September 30, 2023, included $201 million from short-tail lines, primarily property and marine, and A&H lines.

Corporate. Net adverse development for the three months ended September 30, 2024 and 2023, included adverse development resulting from our annual review of environmental liabilities. Net adverse development for the nine months ended September 30, 2024 and 2023, also included adverse development for molestation-related claims development.

Future policy benefits

The following tables present a roll-forward of the liability for future policy benefits included in the Life Insurance segment:


Present Value of Expected Net Premiums	Nine Months Ended September 30, 2024
(in millions of U.S. dollars)	Term Life		Whole Life		A&H		Other		Total
Balance – beginning of period	$	1,590	$	3,950	$	10,432	$	64	$	16,036
Beginning balance at original discount rate	1,992		3,945		10,692		64		16,693
Effect of changes in cash flow assumptions	(140)		160		394		(4)		410
Effect of actual variances from expected experience	6		9		(126)		(1)		(112)
Adjusted beginning of period balance	1,858		4,114		10,960		59		16,991

Issuances	161		942		1,717		53		2,873
Interest accrual	45		91		424		3		563
Net premiums collected (1)	(183)		(852)		(1,105)		(27)		(2,167)

Other (including foreign exchange)	(10)		14		(158)		14		(140)
Ending balance at original discount rate	1,871		4,309		11,838		102		18,120
Effect of changes in discount rate assumptions	(287)		94		136		1		(56)
Balance – end of period	$	1,584	$	4,403	$	11,974	$	103	$	18,064

(1)Net premiums collected represent the portion of gross premiums collected from policyholders that is used to fund expected benefit.


Present Value of Expected Future Policy Benefits	Nine Months Ended September 30, 2024
(in millions of U.S. dollars)	Term Life		Whole Life		A&H		Other		Total
Balance – beginning of period	$	2,254	$	10,063	$	14,650	$	495	$	27,462
Beginning balance at original discount rate	2,749		9,991		15,071		492		28,303
Effect of changes in cash flow assumptions	(137)		181		348		(5)		387
Effect of actual variances from expected experience	13		21		(127)		—		(93)
Adjusted beginning of period balance	2,625		10,193		15,292		487		28,597

Issuances	161		942		1,717		53		2,873
Interest accrual	59		240		519		11		829
Benefits payments	(173)		(260)		(1,186)		(14)		(1,633)

Other (including foreign exchange)	27		55		(188)		41		(65)
Ending balance at original discount rate	2,699		11,170		16,154		578		30,601
Effect of changes in discount rate assumptions	(390)		739		65		41		455
Balance – end of period	$	2,309	$	11,909	$	16,219	$	619	$	31,056


Liability for Future Policy Benefits, Life Insurance Segment	September 30, 2024
(in millions of U.S. dollars)	Term Life		Whole Life		A&H		Other		Total
Net liability for future policy benefits	$	725	$	7,506	$	4,245	$	516	$	12,992
Deferred profit liability	276		1,120		194		32		1,622
Net liability for future policy benefits, before reinsurance recoverable	1,001		8,626		4,439		548		14,614
Less: Reinsurance recoverable on future policy benefits	109		45		112		—		266
Net liability for future policy benefits, after reinsurance recoverable	$	892	$	8,581	$	4,327	$	548	$	14,348
Weighted average duration (years)	10.2		27.8		9.8		17.6		21.1


Present Value of Expected Net Premiums	Nine Months Ended September 30, 2023
(in millions of U.S. dollars)	Term Life		Whole Life		A&H		Other		Total
Balance – beginning of period	$	1,806	$	2,308	$	10,711	$	42	$	14,867
Beginning balance at original discount rate	1,867		2,361		11,258		43		15,529
Effect of changes in cash flow assumptions	36		40		(813)		2		(735)
Effect of actual variances from expected experience	(15)		77		(170)		(1)		(109)
Adjusted beginning of period balance	1,888		2,478		10,275		44		14,685
Consolidation of Huatai Group	3		1,690		145		12		1,850
Issuances	90		223		1,026		5		1,344
Interest accrual	45		62		421		1		529
Net premiums collected (1)	(127)		(376)		(998)		(15)		(1,516)


Other (including foreign exchange)	78		(72)		(592)		(1)		(587)
Ending balance at original discount rate	1,977		4,005		10,277		46		16,305
Effect of changes in discount rate assumptions	(69)		(62)		(496)		(1)		(628)
Balance – end of period	$	1,908	$	3,943	$	9,781	$	45	$	15,677

(1)Net premiums collected represent the portion of gross premiums collected from policyholders that is used to fund expected benefit.


Present Value of Expected Future Policy Benefits	Nine Months Ended September 30, 2023
(in millions of U.S. dollars)	Term Life		Whole Life		A&H		Other		Total
Balance – beginning of period	$	2,321	$	5,696	$	15,038	$	269	$	23,324
Beginning balance at original discount rate	2,447		5,874		15,855		280		24,456
Effect of changes in cash flow assumptions	32		44		(849)		3		(770)
Effect of actual variances from expected experience	(12)		86		(168)		(1)		(95)
Adjusted beginning of period balance	2,467		6,004		14,838		282		23,591
Consolidation of Huatai Group	17		3,659		163		233		4,072
Issuances	90		223		1,026		5		1,344
Interest accrual	54		176		514		6		750
Benefit payments	(120)		(212)		(1,064)		(9)		(1,405)

Other (including foreign exchange)	227		30		(1,062)		154		(651)
Ending balance at original discount rate	2,735		9,880		14,415		671		27,701
Effect of changes in discount rate assumptions	(149)		(274)		(790)		(11)		(1,224)
Balance – end of period	$	2,586	$	9,606	$	13,625	$	660	$	26,477


Liability for Future Policy Benefits, Life Insurance Segment	September 30, 2023
(in millions of U.S. dollars)	Term Life		Whole Life		A&H		Other		Total
Net liability for future policy benefits	$	678	$	5,663	$	3,844	$	615	$	10,800
Deferred profit liability	244		709		156		14		1,123
Net liability for future policy benefits, before reinsurance recoverable	922		6,372		4,000		629		11,923
Less: Reinsurance recoverable on future policy benefits	111		47		103		21		282
Net liability for future policy benefits, after reinsurance recoverable	$	811	$	6,325	$	3,897	$	608	$	11,641
Weighted average duration (years)	10.2		26.5		10.3		15.1		19.6

The following table presents a reconciliation of the roll-forwards above to the Future policy benefits liability presented in the Consolidated balance sheets.


	September 30
(in millions of U.S. dollars)	2024		2023
Net liability for future policy benefits, Life Insurance segment	$	12,992	$	10,800
Other (1)	1,389		1,186
Deferred profit liability	1,622		1,123
Liability for future policy benefits, per consolidated balance sheet	$	16,003	$	13,109

(1)Other business principally comprises certain Overseas General Insurance accident and health (A&H) policies and certain Chubb Life Re business.

The following table presents the amount of undiscounted and discounted expected gross premiums and expected future policy benefit payments included in the Life Insurance segment:


	September 30		September 30
(in millions of U.S. dollars)	2024		2023

Term Life
Undiscounted expected future benefit payments	$	4,188	$	4,043
Undiscounted expected future gross premiums	6,669		6,588
Discounted expected future benefit payments	2,309		2,586
Discounted expected future gross premiums	4,504		3,741
Whole Life
Undiscounted expected future benefit payments	28,111		23,454
Undiscounted expected future gross premiums	10,363		9,478
Discounted expected future benefit payments	11,909		9,606
Discounted expected future gross premiums	8,404		7,654
A&H
Undiscounted expected future benefit payments	27,423		23,914
Undiscounted expected future gross premiums	40,183		35,029
Discounted expected future benefit payments	16,219		13,625
Discounted expected future gross premiums	23,655		21,241
Other
Undiscounted expected future benefit payments	1,046		774
Undiscounted expected future gross premiums	200		104
Discounted expected future benefit payments	619		660
Discounted expected future gross premiums	$	177	$	92

The following table presents the amount of revenue and interest recognized in the Consolidated statements of operations for the Life Insurance segment:


	Gross Premiums or Assessments				Interest Accretion
	Nine Months Ended				Nine Months Ended
	September 30				September 30
(in millions of U.S. dollars)	2024		2023		2024		2023
Life Insurance
Term Life	$	509	$	484	$	14	$	9

Whole Life	1,504		864		149		114
A&H	2,250		2,182		95		93
Other	42		28		8		5
Total	$	4,305	$	3,558	$	266	$	221

The following table presents the weighted-average interest rates for the Life Insurance segment:


	Interest Accretion Rate				Current Discount Rate

	September 30				September 30
	2024		2023		2024		2023
Life Insurance
Term Life	3.0	%	2.9	%	5.2	%	6.0	%

Whole Life	3.2	%	3.2	%	4.1	%	4.7	%
A&H	3.8	%	3.7	%	5.8	%	6.7	%
Other	2.7	%	2.6	%	3.8	%	4.3	%

Policyholders' account balances, Separate accounts, and Unearned revenue liabilities

9 Months Ended

Sep. 30, 2024

Policyholder Account Balance [Abstract]

Policyholders' Account Balances, Separate Accounts, and Unearned Revenue Liability

Policyholders' account balances, Separate accounts, and Unearned revenue liabilities

Policyholders' account balances

The following tables present a roll-forward of policyholders' account balances:


	Nine Months Ended September 30, 2024
(in millions of U.S. dollars)	Universal Life		Annuities (2)		Other (3)		Total
Balance – beginning of period	$	1,876	$	2,411	$	2,502	$	6,789


Premiums received	204		294		320		818
Policy charges (1)	(98)		—		(7)		(105)
Surrenders and withdrawals	(95)		(30)		(202)		(327)
Benefit payments (4)	(59)		(116)		(40)		(215)

Interest credited	38		29		41		108
Other (including foreign exchange)	3		20		(223)		(200)
Balance – end of period	$	1,869	$	2,608	$	2,391	$	6,868
Unearned revenue liability							712
Other							556
Policyholders' account liability, per consolidated balance sheet							$	8,136

(1)Contracts included in the policyholder account balances are generally charged a premium and/or monthly assessments on the basis of the account balance.

(2)Relates to Huatai Life.

(3)Primarily comprises policyholder account balances related to investment linked products including endowment and investment contracts, none of which bear significant insurance risk.

(4)Includes benefit payments upon maturity as well as death benefits.


	Nine Months Ended September 30, 2023
(in millions of U.S. dollars)	Universal Life		Annuities (2)		Other (3)		Total
Balance – beginning of period	$	1,199	$	—	$	1,374	$	2,573
Consolidation of Huatai Group	602		2,325		1,087		4,014

Premiums received	174		79		165		418
Policy charges (1)	(96)		—		(8)		(104)
Surrenders and withdrawals	(62)		(8)		(113)		(183)
Benefit payments (4)	(6)		(38)		(43)		(87)

Interest credited	30		16		22		68
Other (including foreign exchange)	(56)		(34)		(35)		(125)
Balance – end of period	$	1,785	$	2,340	$	2,449	$	6,574
Unearned revenue liability							604
Policyholders' account liability, per consolidated balance sheet							$	7,178

(1)Contracts included in the policyholder account balances are generally charged a premium and/or monthly assessments on the basis of the account balance.

(2)Relates to Huatai Life.

(3)Primarily comprises policyholder account balances related to investment linked products including endowment and investment contracts, none of which bear significant insurance risk.

(4)Includes benefit payments upon maturity as well as death benefits.



	September 30
	2024									2023
(in millions of U.S. dollars, except for percentages)	Universal Life			Annuities			Other			Universal Life			Annuities			Other
Weighted-average crediting rate	2.7		%	1.6		%	2.7		%	3.1		%	2.7		%	1.2		%
Net amount at risk (1)	$	12,648		$	—		$	440		$	11,705		$	—		$	576
Cash Surrender Value	$	1,699		$	1,691		$	2,091		$	1,573		$	1,474		$	2,173

(1)For those guarantees of benefits that are payable in the event of death, the net amount at risk is defined as the current guaranteed minimum death benefit in excess of the current account balance at the balance sheet date.

The following tables present the balance of account values by range of guaranteed minimum crediting rates and the related range of difference, in basis points, between rates being credited to policyholders and the respective guaranteed minimum:

Universal Life


	September 30, 2024
(in millions of U.S. dollars)	At Guaranteed Minimum		1 Basis Point - 50 Basis Points Above		51 Basis Points - 150 Basis Points Above		Greater Than 150 Basis Points Above		Total
Guaranteed minimum crediting rates
Up to 2.00%	$	464	$	—	$	47	$	92	$	603
2.01% – 4.00%	249		371		633		—		1,253
Greater than 4.00%	13		—		—		—		13
Total	$	726	$	371	$	680	$	92	$	1,869


	September 30, 2023
(in millions of U.S. dollars)	At Guaranteed Minimum		1 Basis Point - 50 Basis Points Above		51 Basis Points - 150 Basis Points Above		Greater Than 150 Basis Points Above		Total
Guaranteed minimum crediting rates
Up to 2.00%	$	421	$	—	$	30	$	11	$	462
2.01% – 4.00%	80		330		559		333		1,302
Greater than 4.00%	21		—		—		—		21
Total	$	522	$	330	$	589	$	344	$	1,785

Annuities


	September 30, 2024
(in millions of U.S. dollars)	At Guaranteed Minimum		1 Basis Point - 50 Basis Points Above		51 Basis Points - 150 Basis Points Above		Greater Than 150 Basis Points Above		Total
Guaranteed minimum crediting rates
Up to 2.00%	$	72	$	—	$	1,645	$	47	$	1,764
2.01% – 4.00%	844		—		—		—		844
Greater than 4.00%	—		—		—		—		—
Total	$	916	$	—	$	1,645	$	47	$	2,608


	September 30, 2023
(in millions of U.S. dollars)	At Guaranteed Minimum		1 Basis Point - 50 Basis Points Above		51 Basis Points - 150 Basis Points Above		Greater Than 150 Basis Points Above		Total
Guaranteed minimum crediting rates
Up to 2.00%	$	693	$	—	$	1,543	$	—	$	2,236
2.01% – 4.00%	104		—		—		—		104
Greater than 4.00%	—		—		—		—		—
Total	$	797	$	—	$	1,543	$	—	$	2,340

Other policyholders' account balances


	September 30, 2024
(in millions of U.S. dollars)	At Guaranteed Minimum		1 Basis Point - 50 Basis Points Above		51 Basis Points - 150 Basis Points Above		Greater Than 150 Basis Points Above		Total
Guaranteed minimum crediting rates
Up to 2.00%	$	349	$	2	$	214	$	459	$	1,024
2.01% – 4.00%	1,317		50		—		—		1,367
Greater than 4.00%	—		—		—		—		—
Total	$	1,666	$	52	$	214	$	459	$	2,391


	September 30, 2023
(in millions of U.S. dollars)	At Guaranteed Minimum		1 Basis Point - 50 Basis Points Above		51 Basis Points - 150 Basis Points Above		Greater Than 150 Basis Points Above		Total
Guaranteed minimum crediting rates
Up to 2.00%	$	738	$	—	$	230	$	545	$	1,513
2.01% – 4.00%	373		531		27		—		931
Greater than 4.00%	5		—		—		—		5
Total	$	1,116	$	531	$	257	$	545	$	2,449

Separate accounts

Separate account assets represent segregated funds where investment risks are borne by the customers, except to the extent of certain guarantees made by Chubb. The assets that support variable contracts are measured at fair value and are reported as Separate account assets and corresponding liabilities are reported within Separate account liabilities on the Consolidated balance sheets. Policy charges assessed against the policyholders for mortality, administration, and other services are included in Net premiums earned on the Consolidated statements of operations.

The following table presents the aggregate fair value of Separate account assets, by major security type:


	September 30		September 30
(in millions of U.S. dollars)	2024		2023
Cash and cash equivalents	$	75	$	88

Mutual funds	5,844		5,129

Fixed maturities	77		89

Total	$	5,996	$	5,306

The following table presents a roll-forward of separate account liabilities:


	Nine Months Ended
	September 30
(in millions of U.S. dollars)	2024		2023
Balance – beginning of period	$	5,573	$	5,190

Premiums and deposits	945		724
Policy charges	(118)		(103)
Surrenders and withdrawals	(666)		(407)
Benefit payments	(320)		(291)
Investment performance	625		382

Other (including foreign exchange)	(43)		(189)
Balance – end of period	$	5,996	$	5,306
Cash surrender value (1)	$	5,790	$	5,285

(1)Cash surrender value represents the amount of the policyholders account balances distributable at the balance sheet date less certain surrender charges.

Unearned revenue liabilities

Unearned revenue liabilities represent policy charges for services to be provided in future periods. The charges are reflected as deferred revenue and are generally amortized over the expected life of the contract using the same methodology, factors, and assumptions used to amortize deferred acquisition costs. Unearned revenue liabilities pertaining to both policyholders' account

balances and separate accounts are recorded in Policyholders' account balances in the Consolidated balance sheets. The following table presents a roll-forward of unearned revenue liabilities:


	Nine Months Ended
	September 30
(in millions of U.S. dollars)	2024		2023
Balance – beginning of period	$	673	$	567
Deferred revenue	106		96
Amortization	(54)		(44)

Other (including foreign exchange)	(13)		(15)
Balance – end of period	$	712	$	604

Market risk benefits

Our reinsurance programs covering variable annuity guarantees, comprising guaranteed living benefits (GLB) and guaranteed minimum death benefits (GMDB), meet the definition of Market risk benefits (MRB). The following table presents a roll-forward of MRB:


	Nine Months Ended September 30
(in millions of U.S. dollars)	2024		2023
Balance – beginning of period	$	771	$	800
Balance, beginning of period, before effect of changes in the instrument-specific credit risk	749		776



Interest rate changes	10		(117)
Effect of changes in equity markets	(147)		(69)
Effect of changes in volatilities	9		51
Actual policyholder behavior different from expected behavior	55		16
Effect of changes in future expected policyholder behavior	87		89

Effect of timing and all other	(34)		3
Balance, end of period, before effect of changes in the instrument-specific credit risk	$	729	$	749
Effect of changes in the instrument-specific credit risk	19		21
Balance – end of period	$	748	$	770
Weighted-average age of policyholders (years)	74		73
Net amount at risk (1)	$	1,595	$	2,138

(1) The net amount at risk is defined as the present value of future claim payments assuming policy account values and guaranteed values are fixed at the valuation date, and reinsurance coverage ends at the earlier of the maturity of the underlying variable annuity policy or the reinsurance treaty. No withdrawals, lapses, and mortality improvements are assumed in the projection. GLB-related risks contain conservative mortality and annuitization assumptions.

Excluded from the table above are MRB losses of $258 million and $181 million for the nine months ended September 30, 2024 and 2023, respectively, reported in the Consolidated statements of operations, relating to the market risk benefits' economic hedge and other net cash flows. There is no reinsurance recoverable associated with our liability for MRB.

In the third quarter of 2024, we completed a review of policyholder behavior related to annuitizations, partial withdrawals, lapses, and mortality for our variable annuity reinsurance business. These refinements resulted in a net increase of approximately $87 million to the MRB fair value, recognized as a Market risk benefits loss.

•We refreshed our partial withdrawal and annuitization assumptions to include an additional year of experience. The annuitization updates included treaty-based and age-based behavior.

•We updated the lapse assumptions to include an additional year of experience and refined the lapse rates for policies with guaranteed values far in excess of their account values.

•We updated the mortality assumptions to include an additional year of experience.

For MRB, Chubb estimates fair value using an internal valuation model which includes 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. All reinsurance treaties contain claim limits, which are also factored into the valuation model.

Valuation Technique

Significant Unobservable Inputs

September 30, 2024

September 30, 2023

Ranges

Weighted Average(1)

Ranges

Weighted Average(1)

MRB (1)

Actuarial model

Lapse rate

0.5% – 27.3%

3.4

%

0.5% – 30%

4.0

%

Annuitization rate

0% – 100%

4.6

%

0% – 100%

4.8

%

(1)The weighted-average lapse and annuitization rates are determined by weighting each treaty's rates by the MRB contract's fair value.

The most significant policyholder behavior assumptions include lapse rates for MRBs, and GLB annuitization rates. Assumptions regarding lapse rates and GLB 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 GLB annuitization rate is the percentage of policies for which the policyholder will elect to annuitize using the guaranteed benefit provided under the GLB. All else equal, as GLB 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 by blending the experience with data received from other ceding companies. 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. For detailed information on our lapse and annuitization rate assumptions, refer to Note 11 to the Consolidated Financial Statements of our 2023 Form 10-K.

Market risk benefits

9 Months Ended

Sep. 30, 2024

Market Risk Benefit [Abstract]

Market Risk Benefits

Policyholders' account balances, Separate accounts, and Unearned revenue liabilities

Policyholders' account balances

The following tables present a roll-forward of policyholders' account balances:


	Nine Months Ended September 30, 2024
(in millions of U.S. dollars)	Universal Life		Annuities (2)		Other (3)		Total
Balance – beginning of period	$	1,876	$	2,411	$	2,502	$	6,789


Premiums received	204		294		320		818
Policy charges (1)	(98)		—		(7)		(105)
Surrenders and withdrawals	(95)		(30)		(202)		(327)
Benefit payments (4)	(59)		(116)		(40)		(215)

Interest credited	38		29		41		108
Other (including foreign exchange)	3		20		(223)		(200)
Balance – end of period	$	1,869	$	2,608	$	2,391	$	6,868
Unearned revenue liability							712
Other							556
Policyholders' account liability, per consolidated balance sheet							$	8,136

(1)Contracts included in the policyholder account balances are generally charged a premium and/or monthly assessments on the basis of the account balance.

(2)Relates to Huatai Life.

(3)Primarily comprises policyholder account balances related to investment linked products including endowment and investment contracts, none of which bear significant insurance risk.

(4)Includes benefit payments upon maturity as well as death benefits.


	Nine Months Ended September 30, 2023
(in millions of U.S. dollars)	Universal Life		Annuities (2)		Other (3)		Total
Balance – beginning of period	$	1,199	$	—	$	1,374	$	2,573
Consolidation of Huatai Group	602		2,325		1,087		4,014

Premiums received	174		79		165		418
Policy charges (1)	(96)		—		(8)		(104)
Surrenders and withdrawals	(62)		(8)		(113)		(183)
Benefit payments (4)	(6)		(38)		(43)		(87)

Interest credited	30		16		22		68
Other (including foreign exchange)	(56)		(34)		(35)		(125)
Balance – end of period	$	1,785	$	2,340	$	2,449	$	6,574
Unearned revenue liability							604
Policyholders' account liability, per consolidated balance sheet							$	7,178

(1)Contracts included in the policyholder account balances are generally charged a premium and/or monthly assessments on the basis of the account balance.

(2)Relates to Huatai Life.

(3)Primarily comprises policyholder account balances related to investment linked products including endowment and investment contracts, none of which bear significant insurance risk.

(4)Includes benefit payments upon maturity as well as death benefits.



	September 30
	2024									2023
(in millions of U.S. dollars, except for percentages)	Universal Life			Annuities			Other			Universal Life			Annuities			Other
Weighted-average crediting rate	2.7		%	1.6		%	2.7		%	3.1		%	2.7		%	1.2		%
Net amount at risk (1)	$	12,648		$	—		$	440		$	11,705		$	—		$	576
Cash Surrender Value	$	1,699		$	1,691		$	2,091		$	1,573		$	1,474		$	2,173

(1)For those guarantees of benefits that are payable in the event of death, the net amount at risk is defined as the current guaranteed minimum death benefit in excess of the current account balance at the balance sheet date.

The following tables present the balance of account values by range of guaranteed minimum crediting rates and the related range of difference, in basis points, between rates being credited to policyholders and the respective guaranteed minimum:

Universal Life


	September 30, 2024
(in millions of U.S. dollars)	At Guaranteed Minimum		1 Basis Point - 50 Basis Points Above		51 Basis Points - 150 Basis Points Above		Greater Than 150 Basis Points Above		Total
Guaranteed minimum crediting rates
Up to 2.00%	$	464	$	—	$	47	$	92	$	603
2.01% – 4.00%	249		371		633		—		1,253
Greater than 4.00%	13		—		—		—		13
Total	$	726	$	371	$	680	$	92	$	1,869


	September 30, 2023
(in millions of U.S. dollars)	At Guaranteed Minimum		1 Basis Point - 50 Basis Points Above		51 Basis Points - 150 Basis Points Above		Greater Than 150 Basis Points Above		Total
Guaranteed minimum crediting rates
Up to 2.00%	$	421	$	—	$	30	$	11	$	462
2.01% – 4.00%	80		330		559		333		1,302
Greater than 4.00%	21		—		—		—		21
Total	$	522	$	330	$	589	$	344	$	1,785

Annuities


	September 30, 2024
(in millions of U.S. dollars)	At Guaranteed Minimum		1 Basis Point - 50 Basis Points Above		51 Basis Points - 150 Basis Points Above		Greater Than 150 Basis Points Above		Total
Guaranteed minimum crediting rates
Up to 2.00%	$	72	$	—	$	1,645	$	47	$	1,764
2.01% – 4.00%	844		—		—		—		844
Greater than 4.00%	—		—		—		—		—
Total	$	916	$	—	$	1,645	$	47	$	2,608


	September 30, 2023
(in millions of U.S. dollars)	At Guaranteed Minimum		1 Basis Point - 50 Basis Points Above		51 Basis Points - 150 Basis Points Above		Greater Than 150 Basis Points Above		Total
Guaranteed minimum crediting rates
Up to 2.00%	$	693	$	—	$	1,543	$	—	$	2,236
2.01% – 4.00%	104		—		—		—		104
Greater than 4.00%	—		—		—		—		—
Total	$	797	$	—	$	1,543	$	—	$	2,340

Other policyholders' account balances


	September 30, 2024
(in millions of U.S. dollars)	At Guaranteed Minimum		1 Basis Point - 50 Basis Points Above		51 Basis Points - 150 Basis Points Above		Greater Than 150 Basis Points Above		Total
Guaranteed minimum crediting rates
Up to 2.00%	$	349	$	2	$	214	$	459	$	1,024
2.01% – 4.00%	1,317		50		—		—		1,367
Greater than 4.00%	—		—		—		—		—
Total	$	1,666	$	52	$	214	$	459	$	2,391


	September 30, 2023
(in millions of U.S. dollars)	At Guaranteed Minimum		1 Basis Point - 50 Basis Points Above		51 Basis Points - 150 Basis Points Above		Greater Than 150 Basis Points Above		Total
Guaranteed minimum crediting rates
Up to 2.00%	$	738	$	—	$	230	$	545	$	1,513
2.01% – 4.00%	373		531		27		—		931
Greater than 4.00%	5		—		—		—		5
Total	$	1,116	$	531	$	257	$	545	$	2,449

Separate accounts

Separate account assets represent segregated funds where investment risks are borne by the customers, except to the extent of certain guarantees made by Chubb. The assets that support variable contracts are measured at fair value and are reported as Separate account assets and corresponding liabilities are reported within Separate account liabilities on the Consolidated balance sheets. Policy charges assessed against the policyholders for mortality, administration, and other services are included in Net premiums earned on the Consolidated statements of operations.

The following table presents the aggregate fair value of Separate account assets, by major security type:


	September 30		September 30
(in millions of U.S. dollars)	2024		2023
Cash and cash equivalents	$	75	$	88

Mutual funds	5,844		5,129

Fixed maturities	77		89

Total	$	5,996	$	5,306

The following table presents a roll-forward of separate account liabilities:


	Nine Months Ended
	September 30
(in millions of U.S. dollars)	2024		2023
Balance – beginning of period	$	5,573	$	5,190

Premiums and deposits	945		724
Policy charges	(118)		(103)
Surrenders and withdrawals	(666)		(407)
Benefit payments	(320)		(291)
Investment performance	625		382

Other (including foreign exchange)	(43)		(189)
Balance – end of period	$	5,996	$	5,306
Cash surrender value (1)	$	5,790	$	5,285

(1)Cash surrender value represents the amount of the policyholders account balances distributable at the balance sheet date less certain surrender charges.

Unearned revenue liabilities

Unearned revenue liabilities represent policy charges for services to be provided in future periods. The charges are reflected as deferred revenue and are generally amortized over the expected life of the contract using the same methodology, factors, and assumptions used to amortize deferred acquisition costs. Unearned revenue liabilities pertaining to both policyholders' account

balances and separate accounts are recorded in Policyholders' account balances in the Consolidated balance sheets. The following table presents a roll-forward of unearned revenue liabilities:


	Nine Months Ended
	September 30
(in millions of U.S. dollars)	2024		2023
Balance – beginning of period	$	673	$	567
Deferred revenue	106		96
Amortization	(54)		(44)

Other (including foreign exchange)	(13)		(15)
Balance – end of period	$	712	$	604

Market risk benefits

Our reinsurance programs covering variable annuity guarantees, comprising guaranteed living benefits (GLB) and guaranteed minimum death benefits (GMDB), meet the definition of Market risk benefits (MRB). The following table presents a roll-forward of MRB:


	Nine Months Ended September 30
(in millions of U.S. dollars)	2024		2023
Balance – beginning of period	$	771	$	800
Balance, beginning of period, before effect of changes in the instrument-specific credit risk	749		776



Interest rate changes	10		(117)
Effect of changes in equity markets	(147)		(69)
Effect of changes in volatilities	9		51
Actual policyholder behavior different from expected behavior	55		16
Effect of changes in future expected policyholder behavior	87		89

Effect of timing and all other	(34)		3
Balance, end of period, before effect of changes in the instrument-specific credit risk	$	729	$	749
Effect of changes in the instrument-specific credit risk	19		21
Balance – end of period	$	748	$	770
Weighted-average age of policyholders (years)	74		73
Net amount at risk (1)	$	1,595	$	2,138

(1) The net amount at risk is defined as the present value of future claim payments assuming policy account values and guaranteed values are fixed at the valuation date, and reinsurance coverage ends at the earlier of the maturity of the underlying variable annuity policy or the reinsurance treaty. No withdrawals, lapses, and mortality improvements are assumed in the projection. GLB-related risks contain conservative mortality and annuitization assumptions.

Excluded from the table above are MRB losses of $258 million and $181 million for the nine months ended September 30, 2024 and 2023, respectively, reported in the Consolidated statements of operations, relating to the market risk benefits' economic hedge and other net cash flows. There is no reinsurance recoverable associated with our liability for MRB.

In the third quarter of 2024, we completed a review of policyholder behavior related to annuitizations, partial withdrawals, lapses, and mortality for our variable annuity reinsurance business. These refinements resulted in a net increase of approximately $87 million to the MRB fair value, recognized as a Market risk benefits loss.

•We refreshed our partial withdrawal and annuitization assumptions to include an additional year of experience. The annuitization updates included treaty-based and age-based behavior.

•We updated the lapse assumptions to include an additional year of experience and refined the lapse rates for policies with guaranteed values far in excess of their account values.

•We updated the mortality assumptions to include an additional year of experience.

For MRB, Chubb estimates fair value using an internal valuation model which includes 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. All reinsurance treaties contain claim limits, which are also factored into the valuation model.

Valuation Technique

Significant Unobservable Inputs

September 30, 2024

September 30, 2023

Ranges

Weighted Average(1)

Ranges

Weighted Average(1)

MRB (1)

Actuarial model

Lapse rate

0.5% – 27.3%

3.4

%

0.5% – 30%

4.0

%

Annuitization rate

0% – 100%

4.6

%

0% – 100%

4.8

%

(1)The weighted-average lapse and annuitization rates are determined by weighting each treaty's rates by the MRB contract's fair value.

The most significant policyholder behavior assumptions include lapse rates for MRBs, and GLB annuitization rates. Assumptions regarding lapse rates and GLB 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 GLB annuitization rate is the percentage of policies for which the policyholder will elect to annuitize using the guaranteed benefit provided under the GLB. All else equal, as GLB 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 by blending the experience with data received from other ceding companies. 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. For detailed information on our lapse and annuitization rate assumptions, refer to Note 11 to the Consolidated Financial Statements of our 2023 Form 10-K.

Debt	9 Months Ended
Debt	Sep. 30, 2024
Debt Disclosure [Abstract]
Debt Disclosure	Debt On March 7, 2024 and July 31, 2024, Chubb INA Holdings LLC (Chubb INA) issued $1.0 billion and $600 million, respectively, of 5.00 percent senior notes due March 2034. The 5.00 percent senior notes due March 2034 constitute a single series of notes with an aggregate principal amount of $1.6 billion. On July 31, 2024, Chubb INA issued $700 million of 4.65 percent senior notes due August 2029. These senior unsecured notes are guaranteed on a senior basis by Chubb Limited and they rank equally with all of Chubb INA's other senior obligations. They also contain customary limitations on lien provisions as well as customary events of default provisions which, if breached, could result in the accelerated maturity of such senior debt. These senior notes are redeemable at any time at Chubb INA's option subject to a “make-whole” premium (the present value of the remaining principal and interest discounted at the applicable comparable government bond rate plus 0.15 percent). The notes are also redeemable at par plus accrued and unpaid interest in the event of certain changes in tax law. These notes do not have the benefit of any sinking fund.

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Name Accounting Standards Codification
-Section 50
-Paragraph 6
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481544/470-10-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 405
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 470
-Name Accounting Standards Codification
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-URI https://asc.fasb.org/470/tableOfContent

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482925/835-30-45-2

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
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Reference 14: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
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Reference 16: http://www.xbrl.org/2003/role/disclosureRef
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Reference 17: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1C

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1I
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I

Commitments and Contingencies Disclosure [Abstract]

Commitments, contingencies, and guarantees

9 Months Ended

Sep. 30, 2024

Commitments, contingencies, and guarantees

a) Derivative instruments

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, and exchange-traded equity futures contracts on equity market indices to limit equity exposure in the market risk benefit (MRB) book of business. Derivative instruments are principally recorded in either Other assets (OA) or Accounts payable, accrued expenses, and other liabilities (AP) in the Consolidated balance sheets. Convertible securities are recorded in either Fixed maturities available-for-sale (FM AFS) or Equity securities (ES), depending on the underlying investment. These are the most numerous and frequent derivative transactions. In addition, Chubb, from time to time, purchases to be announced mortgage-backed securities (TBAs) as part of its investing activities.

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. Some of Chubb's derivatives satisfy hedge accounting requirements, as discussed below. We also consider economic hedging for planned cross border transactions.

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


				September 30, 2024								December 31, 2023
	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 derivatives not designated as hedging instruments:
Foreign currency forward contracts	OA / (AP)	$	38	$	(125)	$	4,399		$	27		$	(94)	$	3,662
Options/Futures contracts on notes and bonds	OA / (AP)	4		(2)		1,602			27			(42)		2,062
Convertible securities (1)	FM AFS / ES	61		—		65			56			—		64
		$	103	$	(127)	$	6,066		$	110		$	(136)	$	5,788
Other derivative instruments:
Futures contracts on equities (2)	OA / (AP)	$	—	$	(25)	$	967		$	—		$	(37)	$	1,157
Other	OA / (AP)	—		(5)		355			—			(5)		217
		$	—	$	(30)	$	1,322		$	—		$	(42)	$	1,374
Derivatives designated as hedging instruments:
Cross-currency swaps - fair value hedges	OA / (AP)	$	130	$	—	$	1,652		$	126		$	—	$	1,631
Cross-currency swaps - net investment hedges	OA / (AP)	20		(174)		2,969			10			(128)		1,619
		$	150	$	(174)	$	4,621		$	136		$	(128)	$	3,250

(1)Includes fair value of embedded derivatives.

(2)Related to MRB book of business.

At September 30, 2024, and December 31, 2023, net derivative liabilities of $139 million and $115 million, respectively, included in the table above were subject to a master netting agreement. The remaining derivatives included in the table above were not subject to a master netting agreement.

b) Hedge accounting

We designate certain derivatives as fair value hedges and net investment hedges for accounting purposes to hedge for foreign currency exposure associated with portions of our euro denominated debt and the net investment in certain foreign subsidiaries, respectively. These derivatives comprise cross-currency swaps, which are agreements under which two counterparties exchange interest payments and principal denominated in different currencies at a future date. These hedges have been and are expected to be highly effective.

(i) Cross-currency swaps - fair value hedges

Chubb holds certain cross-currency swaps designated as fair value hedges. The objective of these cross-currency swaps is to hedge the foreign currency risk on €1.5 billion, or approximately $1.7 billion at September 30, 2024, of euro denominated debt by converting cash flows back into the U.S. dollar.

These hedges are carried at fair value, with changes in fair value recorded in Other comprehensive income (OCI). The gains or losses on the fair value hedges offsetting the foreign currency remeasurement on the hedged euro denominated senior notes are reclassified from OCI into Net realized gains (losses), and an additional portion is reclassified into Interest expense, as follows:


	Three Months Ended				Nine Months Ended
	September 30				September 30
(pre-tax, in millions of U.S. dollars)	2024		2023		2024		2023
Gain (loss) recognized in OCI	$	42	$	(17)	$	(12)	$	23
Net realized gain (loss) reclassified from OCI	63		(51)		14		(20)
Interest expense reclassified from OCI	(3)		(4)		(11)		(12)
OCI gain (loss) after reclassifications	$	(18)	$	38	$	(15)	$	55

(ii) Cross-currency swaps - net investment hedges

Chubb holds certain cross-currency swaps designated as net investment hedges. The objective of these cross-currency swaps is to hedge the foreign currency exposure in the net investments of certain foreign subsidiaries by converting cash flows from U.S. dollar to the British pound sterling, Japanese yen, Swiss franc, and Chinese yuan renminbi. The hedged risk is designated as the foreign currency exposure arising between the functional currency of the foreign subsidiary and the functional currency of its parent entity.

The mark-to-market adjustments for foreign currency changes will remain until the underlying hedge subsidiary is deconsolidated or if hedge accounting is discontinued.

These net investment hedges are carried at fair value, with changes in fair value recorded in Cumulative translation adjustments (CTA) within OCI, and a portion is reclassified to Interest expense as follows:


	Three Months Ended				Nine Months Ended
	September 30				September 30
(pre-tax, in millions of U.S. dollars)	2024		2023		2024		2023
Gain (loss) recognized in OCI	$	(98)	$	(20)	$	(25)	$	(8)
Interest income reclassified from OCI	5		3		11		10
OCI gain (loss) after reclassifications	$	(103)	$	(23)	$	(36)	$	(18)

c) Derivative instruments not designated as hedges

Derivative instruments which are not designated as hedges are carried at fair value with changes in fair value recorded in Net realized gains (losses) or, for futures contracts on equities, related to the MRB book of business, in Market risk benefits gains (losses) in the Consolidated statements of operations. The following table presents net gains (losses) related to derivative instrument activity in the Consolidated statements of operations:


	Three Months Ended				Nine Months Ended
	September 30				September 30
(in millions of U.S. dollars)	2024		2023		2024		2023
Investment and embedded derivative instruments:
Foreign currency forward contracts	$	52	$	(17)	$	(28)	$	(95)

All other futures contracts, options, and equities	12		29		30		5
Convertible securities (1)	2		(3)		4		(2)

Total investment and embedded derivative instruments	$	66	$	9	$	6	$	(92)
Other derivative instruments:
Futures contracts on equities (2)	$	(41)	$	52	$	(157)	$	(80)
Other	(2)		(7)		(7)		(6)
Total other derivative instruments	$	(43)	$	45	$	(164)	$	(86)
	$	23	$	54	$	(158)	$	(178)

(1)Includes embedded derivatives.

(2)Related to MRB book of business.

(i) Foreign currency exposure management

A foreign currency forward contract (forward) is an agreement between participants to exchange specific 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 market risk benefit reserves.

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, level of interest rates, 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.

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, from time to time, 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 to be announced mortgage-backed securities (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, from time to time, both for their total return and for the flexibility they provide related to our mortgage-backed security strategy.

(v) Futures contracts on equities

Under the MRB 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. We may recognize a loss for 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). 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 MRB liability and the exchange-traded equity futures are included in Market risk benefits gains (losses) in the Consolidated statements of operations.

d) 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

	September 30, 2024		December 31, 2023
(in millions of U.S. dollars)	Overnight and Continuous
Collateral held under securities lending agreements:
Cash	$	784	$	555
U.S. Treasury / Agency	361		33
Non-U.S.	680		621
Corporate and asset-backed securities	64		57

Municipal	3		6
Equity securities	35		27

	$	1,927	$	1,299
Gross amount of recognized liability for securities lending payable	$	1,927	$	1,299

At September 30, 2024, and December 31, 2023, our repurchase agreement obligations of $3,048 million and $2,833 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 or Other investments, 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
	September 30, 2024								December 31, 2023
	Up to 30 Days		30-90 Days		Greater than 90 Days		Total		Up to 30 Days		30-90 Days		Greater than 90 Days		Total
(in millions of U.S. dollars)
Collateral pledged under repurchase agreements:
Cash	$	—	$	—	$	—	$	—	$	—	$	33	$	1	$	34
Non-U.S.	1,768		—		—		1,768		1,355		—		—		1,355
U.S. Treasury / Agency	—		100		—		100		—		105		—		105


Mortgage-backed securities	469		459		477		1,405		—		913		517		1,430
	$	2,237	$	559	$	477	$	3,273	$	1,355	$	1,051	$	518	$	2,924
Gross amount of recognized liabilities for repurchase agreements							$	3,048							$	2,833
Difference (1)							$	225							$	91

(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.

e) Fixed maturities

At September 30, 2024, and December 31, 2023, commitments to purchase fixed income securities over the next several years were $1.2 billion and $1.0 billion, respectively.

f) Private equities

Private equities in the Consolidated balance sheets are investments in limited partnerships and partially-owned investment companies with a carrying value of $14.2 billion at September 30, 2024. In connection with these investments, we have commitments that may require funding of up to $6.8 billion over the next several years. At December 31, 2023, these investments had a carrying value of $13.9 billion with commitments that could have required funding of up to $6.2 billion.

g) Income taxes

At September 30, 2024, $83 million of unrecognized tax benefits remain outstanding. It is reasonably possible that, over the next twelve months, the amount of unrecognized tax benefits may change resulting from the re-evaluation of unrecognized tax benefits arising from examinations by taxing authorities, settlements, and the lapses of statutes of limitations. With few exceptions, Chubb is no longer subject to income tax examinations for years before 2012.

h) Legal proceedings

Our insurance subsidiaries are subject to claims litigation involving disputed interpretations of policy coverages and, in some jurisdictions, direct actions by allegedly-injured persons seeking damages from policyholders. These lawsuits, involving claims on policies issued by our subsidiaries which are typical to the insurance industry in general and in the normal course of

business, are considered in our loss and loss expense reserves. In addition to claims litigation, we are subject to lawsuits and regulatory actions in the normal course of business that do not arise from or directly relate to claims on insurance policies. This category of business litigation typically involves, among other things, allegations of underwriting errors or misconduct, employment claims, regulatory activity, or disputes arising from our business ventures. In the opinion of management, our ultimate liability for these matters could be, but we believe is not likely to be, material to our consolidated financial condition and results of operations.

i) Lease commitments

At September 30, 2024, and December 31, 2023, the right-of-use asset was $748 million and $784 million, respectively, recorded within Other assets, and the lease liability was $817 million and $832 million, respectively, recorded within Accounts payable, accrued expenses, and other liabilities on the Consolidated balance sheets. These leases consist principally of real estate operating leases that are amortized on a straight-line basis over the term of the lease, which expire at various dates.

Shareholders' equity

9 Months Ended

Sep. 30, 2024

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 the Consolidated Financial Statements. Under Swiss corporate law, dividends, including distributions from legal reserves or through a reduction in par value (par value reduction), must be stated in Swiss francs though dividend payments are made by Chubb in U.S. dollars. At September 30, 2024, our Common Shares had a par value of CHF 0.50 per share.

At our May 2024 annual general meeting, our shareholders approved an annual dividend for the following year of up to $3.64 per share, expected to be paid in four quarterly installments of $0.91 per share after the general meeting by way of distribution from capital contribution reserves, transferred to free reserves for payment. The Board of Directors (Board) will determine the record and payment dates at which the annual dividend may be paid until the date of 2025 annual general meeting, and is authorized to abstain from distributing a dividend at its discretion.

At our May 2023 and 2022 annual general meetings, our shareholders approved annual dividends for the following year of up to $3.44 per share and $3.32 per share, respectively, which were paid in four quarterly installments of $0.86 per share and $0.83 per share, respectively, at dates determined by the Board after the annual general meetings by way of a distribution from capital contribution reserves, transferred to free reserves for payment.

The following table presents dividend distributions per Common Share in Swiss francs (CHF) and U.S. dollars (USD):


	Three Months Ended						Nine Months Ended
	September 30						September 30
	2024			2023			2024			2023
	CHF	USD		CHF	USD		CHF	USD		CHF	USD
Total dividend distributions per common share	0.78	$	0.91	0.75	$	0.86	2.35	$	2.68	2.29	$	2.55

Increases in Common Shares in treasury are due to open market repurchases of Common Shares and the surrender of Common Shares to satisfy tax withholding obligations in connection with the vesting of restricted stock and the forfeiture of unvested restricted stock. Decreases in Common Shares in treasury are principally due to grants of restricted stock, exercises of stock options, purchases under the Employee Stock Purchase Plan (ESPP), and share cancellations. At our May 2023 annual general meeting, held on May 17, 2023, our shareholders approved the cancellation of 14,925,028 shares purchased under our share repurchase programs during 2022. The capital reduction was subject to publication requirements and became effective in accordance with Swiss law on May 22, 2023. At our May 2024 annual general meeting, held on May 16, 2024, our shareholders approved the cancellation of 11,825,600 shares purchased under our share repurchase programs during 2023. The capital reduction was subject to publication requirements and became effective in accordance with Swiss law on May 21, 2024. During the nine months ended September 30, 2024, 4,915,964 shares were repurchased, 11,825,600 shares were canceled, and 2,679,748 net shares were issued under employee share-based compensation plans. At September 30, 2024, 16,592,565 Common Shares remain in treasury.

Chubb Limited securities repurchase authorizations

The Board has authorized share repurchase programs as follows:

•$2.5 billion of Chubb Common Shares from May 19, 2022 through June 30, 2023; and

•$5.0 billion of Chubb Common Shares effective July 1, 2023 with no expiration date.

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				Nine Months Ended
	September 30				September 30
(in millions of U.S. dollars, except share data)	2024		2023		2024		2023
Number of shares repurchased	1,441,607		2,949,900		4,915,964		8,634,600
Cost of shares repurchased	$	413	$	606	$	1,299	$	1,758
Repurchase authorization remaining at end of period	$	2,400	$	4,398	$	2,400	$	4,398

The following table presents changes in accumulated other comprehensive income (loss):


	Three Months Ended				Nine Months Ended
	September 30				September 30
(in millions of U.S. dollars)	2024		2023		2024		2023
Accumulated other comprehensive income (loss) (AOCI)
Net unrealized appreciation (depreciation) on investments
Balance – beginning of period, net of tax	$	(5,301)	$	(6,809)	$	(4,177)	$	(7,279)
Change in period, before reclassification from AOCI (before tax)	3,419		(2,240)		2,139		(1,935)
Amounts reclassified from AOCI (before tax)	40		70		154		357
Change in period, before tax	3,459		(2,170)		2,293		(1,578)
Income tax (expense) benefit	(198)		29		(149)		(93)
Total other comprehensive income (loss)	3,261		(2,141)		2,144		(1,671)
Noncontrolling interests, net of tax	2		3		9		3
Balance – end of period, net of tax	(2,042)		(8,953)		(2,042)		(8,953)
Current discount rate on liability for future policy benefits
Balance – beginning of period, net of tax	66		(247)		51		(75)
Change in period, before tax	(672)		683		(672)		497
Income tax (expense) benefit	36		(35)		14		(21)
Total other comprehensive income (loss)	(636)		648		(658)		476
Noncontrolling interests, net of tax	(43)		(3)		(80)		(3)
Balance – end of period, net of tax	(527)		404		(527)		404
Instrument-specific credit risk on market risk benefits
Balance – beginning of period, net of tax	(13)		(16)		(22)		(24)
Change in period, before tax	(8)		(5)		2		3
Income tax benefit	1		—		—		—
Total other comprehensive income (loss)	(7)		(5)		2		3
Noncontrolling interests, net of tax	—		—		—		—
Balance – end of period, net of tax	(20)		(21)		(20)		(21)


	Three Months Ended				Nine Months Ended
	September 30				September 30
(in millions of U.S. dollars)	2024		2023		2024		2023
Accumulated other comprehensive income (loss) (AOCI) - continued
Cumulative foreign currency translation adjustment
Balance – beginning of period, net of tax	(3,342)		(2,920)		(2,945)		(2,966)
Change in period, before reclassification from AOCI (before tax)	450		(314)		6		(269)
Amounts reclassified from AOCI (before tax)	(5)		(3)		(11)		(10)
Change in period, before tax	445		(317)		(5)		(279)
Income tax benefit	7		13		19		21
Total other comprehensive income (loss)	452		(304)		14		(258)
Noncontrolling interests, net of tax	62		(76)		21		(76)
Balance – end of period, net of tax	(2,952)		(3,148)		(2,952)		(3,148)












Fair value hedging instruments
Balance – beginning of period, net of tax	(11)		(53)		(13)		(66)
Change in period, before reclassification from AOCI (before tax)	42		(17)		(12)		23
Amounts reclassified from AOCI (before tax)	(60)		55		(3)		32
Change in period, before tax	(18)		38		(15)		55
Income tax (expense) benefit	4		(7)		3		(11)
Total other comprehensive income (loss)	(14)		31		(12)		44
Noncontrolling interests, net of tax	—		—		—		—
Balance – end of period, net of tax	(25)		(22)		(25)		(22)
Postretirement benefit liability adjustment
Balance – beginning of period, net of tax	297		223		297		225
Change in period, before tax	(1)		(1)		(2)		(3)
Income tax benefit	—		—		1		—
Total other comprehensive loss	(1)		(1)		(1)		(3)
Noncontrolling interests, net of tax	—		—		—		—
Balance – end of period, net of tax	296		222		296		222
Accumulated other comprehensive loss	$	(5,270)	$	(11,518)	$	(5,270)	$	(11,518)

The following table presents reclassifications from accumulated other comprehensive income (loss) to the Consolidated statements of operations:


	Three Months Ended				Nine Months Ended				Consolidated Statement of Operations Location
	September 30				September 30
(in millions of U.S. dollars)	2024		2023		2024		2023
Fixed maturities available-for-sale	$	(40)	$	(70)	$	(154)	$	(357)	Net realized gains (losses)
Income tax benefit	17		25		41		59		Income tax expense
	$	(23)	$	(45)	$	(113)	$	(298)	Net income
Cumulative foreign currency translation adjustment
Cross-currency swaps	$	5	$	3	$	11	$	10	Interest expense
Income tax expense	(1)		(1)		(2)		(2)		Income tax expense
	$	4	$	2	$	9	$	8	Net income
Net gains (losses) of fair value hedging instruments
Cross-currency swaps	$	63	$	(51)	$	14	$	(20)	Net realized gains (losses)
Cross-currency swaps	(3)		(4)		(11)		(12)		Interest expense
Income tax (expense) benefit	(12)		12		—		7		Income tax expense
	$	48	$	(43)	$	3	$	(25)	Net income
Total amounts reclassified from AOCI	$	29	$	(86)	$	(101)	$	(315)

The entire disclosure for equity.

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Compensation and Employee Benefit Plans [Text Block]

Share-based compensation	9 Months Ended
Share-based compensation	Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]
Share-based compensation	Share-based compensation The Chubb Limited 2016 Long-Term Incentive Plan, as amended and restated (the Amended 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 26, 2024, Chubb granted 1,359,237 stock options with a weighted-average grant date fair value of $64.15 each. The fair value of the options issued is estimated on the grant date using the Black-Scholes option pricing model. The Amended 2016 LTIP also permits grants of service-based restricted stock and restricted stock units as well as performance shares and performance stock units. Under the Chubb Deferred Stock Unit Plan, a sub-plan of the Amended 2016 LTIP, eligible participants may defer vested performance stock units and restricted stock units to the extent such awards are U.S.-allocated compensation. Chubb generally grants service-based restricted stock and restricted stock units with a 4-year vesting period, based on a graded vesting schedule. Performance shares and performance stock units granted comprise both target and premium awards that cliff vest at the end of a 3-year performance period based on 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 the peer group. Stock and unit awards are principally granted at market close price on the grant date. On February 26, 2024, Chubb granted 685,665 service-based restricted stock, 290,085 service-based restricted stock units, 101,514 performance shares, and 284,013 performance stock units to employees and officers with a grant date fair value of $254.84 each. Each service-based restricted stock unit and performance stock unit represents our obligation to deliver to the holder one Common Share upon vesting (or the end of the deferral period, if the unit is under the Chubb Deferred Stock Unit Plan).

Postretirement benefits

9 Months Ended

Sep. 30, 2024

Retirement Benefits [Abstract]

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
	2024				2023				2024		2023
Three Months Ended September 30	U.S. Plans		Non-U.S. Plans		U.S. Plans		Non-U.S. Plans
(in millions of U.S. dollars)
Service cost	$	—	$	2	$	—	$	2	$	—	$	—
Non-service cost (benefit):
Interest cost	33		9		35		9		—		1
Expected return on plan assets	(61)		(13)		(56)		(13)		—		—
Amortization of net actuarial (gain) loss	—		—		—		—		(1)		(1)
Amortization of prior service cost	—		—		—		—		—		(1)

Settlements	1		—		3		—		—		—
Total non-service cost (benefit)	(27)		(4)		(18)		(4)		(1)		(1)
Net periodic benefit cost (benefit)	$	(27)	$	(2)	$	(18)	$	(2)	$	(1)	$	(1)


	Pension Benefit Plans								Other Postretirement Benefit Plans
	2024				2023				2024			2023
Nine Months Ended September 30	U.S. Plans		Non-U.S. Plans		U.S. Plans		Non-U.S. Plans
(in millions of U.S. dollars)
Service cost:	$	—	$	7	$	—	$	6		$	—		$	—
Non-service cost (benefit):
Interest cost	100		27		103		27			1			2
Expected return on plan assets	(183)		(38)		(168)		(38)			(2)			(2)
Amortization of net actuarial (gain) loss	(1)		1		—		—			(2)			(1)
Amortization of prior service cost	—		—		—		—			—			(1)
Settlements	1		—		3		—			—			—
Total non-service cost (benefit)	(83)		(10)		(62)		(11)			(3)			(2)
Net periodic benefit cost (benefit)	$	(83)	$	(3)	$	(62)	$	(5)		$	(3)		$	(2)

The line items in which the service cost and non-service cost (benefit) components of net periodic cost (benefit) are included in the Consolidated statements of operations were as follows:


	Pension Benefit Plans				Other Postretirement Benefit Plans
Three Months Ended September 30	2024		2023		2024		2023
(in millions of U.S. dollars)
Service cost:
Losses and loss expenses	$	—	$	—	$	—	$	—
Administrative expenses	2		2		—		—
Total service cost	2		2		—		—
Non-service cost (benefit):
Losses and loss expenses	(3)		(1)		—		—
Administrative expenses	(28)		(21)		(1)		(1)
Total non-service cost (benefit)	(31)		(22)		(1)		(1)
Net periodic benefit cost (benefit)	$	(29)	$	(20)	$	(1)	$	(1)


	Pension Benefit Plans				Other Postretirement Benefit Plans
Nine Months Ended September 30	2024		2023		2024		2023
(in millions of U.S. dollars)
Service cost:
Losses and loss expenses	$	—	$	—	$	—	$	—
Administrative expenses	7		6		—		—
Total service cost	7		6		—		—
Non-service cost (benefit):
Losses and loss expenses	(9)		(6)		—		—
Administrative expenses	(84)		(67)		(3)		(2)
Total non-service cost (benefit)	(93)		(73)		(3)		(2)
Net periodic benefit cost (benefit)	$	(86)	$	(67)	$	(3)	$	(2)

Other Income and Expense

3 Months Ended

Sep. 30, 2024

Other Income and Expenses [Abstract]

Other Income and Expense Disclosure

Other income and expense


	Three Months Ended				Nine Months Ended
	September 30				September 30
(in millions of U.S. dollars)	2024		2023		2024		2023
Equity in net income (loss) of partially-owned entities	$	343	$	150	$	621	$	610
Gains (losses) from fair value changes in separate account assets (1)	(30)		(19)		(9)		(56)
Asset management and performance fee revenue	53		55		163		55
Asset management and performance fee expense	(34)		(33)		(102)		(33)
Federal excise and capital taxes	(7)		(6)		(16)		(17)
Other	—		7		(31)		(9)
Total	$	325	$	154	$	626	$	550

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

Equity in net income of partially-owned entities includes our share of net income or loss, both underlying operating income and mark-to-market movement, related to partially-owned investment companies (private equity) where we own more than three

percent, and partially-owned insurance companies. This line item includes mark-to-market gains (losses) on private equities of $211 million and $318 million for the three and nine months ended September 30, 2024, respectively, and $51 million and $290 million, respectively, for the prior year periods.

Other income and expense includes net income attributable to our investment in Huatai under the equity method of accounting comprising income of $36 million through June 30, 2023. Effective July 1, 2023, we discontinued the equity method of accounting and include the results of operations of Huatai in our consolidated results.

Also included in Other income and expense are gains (losses) from fair value changes in separate account assets that do not qualify for separate account treatment under U.S. GAAP. The offsetting movement in the separate account liabilities is included in Policy benefits in the Consolidated statements of operations.

Asset management and performance fee revenue and expense primarily relate to the management of third-party assets by Huatai's asset management business, which is unrelated to Huatai Group's core insurance operations. These revenues and expenses are recognized in the period in which the services are performed and, for certain asset performance fees, to the extent it is probable that a significant reversal will not occur.

Certain federal excise and capital taxes incurred as a result of capital management initiatives are included in Other income and expense as these are considered capital transactions and are excluded from underwriting results. Bad debt expense for uncollectible premiums is also included in Other income and expense.

Segment information

9 Months Ended

Sep. 30, 2024

Segment Reporting [Abstract]

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. These segments distribute their products through various forms of brokers, agencies, and direct marketing programs. All business segments have established relationships with reinsurance intermediaries. Effective July 1, 2023, the results of Huatai's life and asset management businesses, included within the Life Insurance segment, and the results of Huatai's P&C insurance business, included within Overseas General Insurance, are presented gross within Underwriting income (loss), Net investment income (loss), and Other income (expense) as required under consolidation accounting. Huatai's results prior to July 1, 2023 were included net within Other (income) expense based on our ownership interest as required under equity method accounting.

Management uses Underwriting income (loss) as the basis for 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. Segment income (loss) includes Underwriting income (loss), Net investment income (loss), and other operating income and expense items such as each segment's share of the operating income (loss) related to partially-owned entities and miscellaneous income and expense items for which the segments are held accountable. Our main measure of segment performance is Segment income (loss), which also includes Amortization of purchased intangibles acquired by the segment. We determined that this definition of Segment income (loss) is appropriate and aligns with how the business is managed. We continue to evaluate our segments as our business continues to evolve and may further refine our segments and Segment income (loss) measures.

Revenue and expenses managed at the corporate level, including Net realized gains (losses), Market risk benefits gains (losses), Interest expense, Integration expenses, Income tax expense, and Net income (loss) attributable to noncontrolling interests are reported within Corporate. Integration expenses are one-time costs that are directly attributable to third-party consulting fees, employee-related retention costs, and other professional and legal fees primarily related to the acquisition of Cigna's business in Asia. These items are not allocated to the segment level as they are one-time in nature and are not related to the ongoing business activities of the segment. The Chief Executive Officer does not manage segment results or allocate resources to segments when considering these costs, and therefore are excluded from our definition of Segment income (loss).

Certain items are presented in a different manner for segment reporting purposes than in the Consolidated Financial Statements. These items are reconciled to the consolidated presentation in the Segment measure reclass column below and include:

•Losses and loss expenses include realized gains and losses on crop derivatives. These derivatives were purchased to provide economic benefit, in a manner similar to reinsurance protection, in the event that a significant decline in commodity pricing impacts underwriting results. We view gains and losses on these derivatives as part of the results of our underwriting operations, and therefore, realized gains (losses) from these derivatives are reclassified to losses and loss expenses.

•Policy benefits include fair value changes on separate accounts that do not qualify for separate accounting under U.S. GAAP. These gains and losses have been reclassified from Other (income) expense. We view gains and losses from fair value changes in both separate account assets and liabilities as part of the results of our underwriting operations, and therefore these gains and losses are reclassified to Policy benefits. Policy benefits also include the impact of realized gains and losses on investment portfolios supporting certain participating policies. These realized gains and losses have been reclassified from net realized gains (losses) to policy benefits. This presentation better reflects the economics of the participating policies by connecting the investment performance that is shared with policyholders to the liability.

•Net investment income includes investment income reclassified from Other (income) expense related to partially-owned investment companies (private equity partnerships) where our ownership interest is in excess of three percent. We view investment income from these equity-method private equity partnerships as Net investment income for segment reporting purposes.

The following tables present the Statement of Operations by segment:


For the Three Months Ended September 30, 2024 (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		Segment Measure Reclass		Chubb Consolidated



Net premiums written	$	5,500	$	1,679	$	1,379	$	3,367	$	352	$	1,552	$	—	$	—	$	13,829
Net premiums earned	5,110		1,577		1,419		3,421		316		1,530		—		—		13,373
Losses and loss expenses	3,391		879		1,193		1,631		200		32		58		(1)		7,383
Policy benefits	—		—		—		120		—		989		—		(10)		1,099
Policy acquisition costs	689		315		88		852		89		291		—		—		2,324
Administrative expenses	338		88		2		340		9		213		104		—		1,094
Underwriting income (loss)	692		295		136		478		18		5		(162)		11		1,473
Net investment income	931		112		20		286		64		250		(28)		(127)		1,508
Other (income) expense	6		1		1		5		—		(39)		(202)		(97)		(325)
Amortization expense of purchased intangibles	2		3		5		21		—		10		40		—		81
Segment income (loss)	$	1,615	$	403	$	150	$	738	$	82	$	284	$	(28)	$	(19)	$	3,225
Net realized gains (losses)													179		19		198
Market risk benefits gains (losses)													(230)		—		(230)
Interest expense													192		—		192
Integration expenses													7		—		7
Income tax expense													504		—		504
Net income (loss)													$	(782)	$	—	$	2,490
Net income attributable to noncontrolling interests													166		—		166
Net income (loss) attributable to Chubb													$	(948)	$	—	$	2,324


For the Three Months Ended September 30, 2023 (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		Segment Measure Reclass		Chubb Consolidated



Net premiums written	$	5,132	$	1,527	$	1,521	$	3,211	$	261	$	1,452	$	—	$	—	$	13,104
Net premiums earned	4,735		1,407		1,540		3,311		239		1,442		—		—		12,674
Losses and loss expenses	3,025		900		1,356		1,635		116		20		61		(7)		7,106
Policy benefits	—		—		—		91		—		866		—		(19)		938
Policy acquisition costs	640		287		76		827		69		279		—		—		2,178
Administrative expenses	323		84		3		327		9		216		98		—		1,060
Underwriting income (loss)	747		136		105		431		45		61		(159)		26		1,392
Net investment income	780		94		12		248		47		211		14		(92)		1,314
Other (income) expense	6		2		—		(10)		—		(28)		(51)		(73)		(154)
Amortization expense of purchased intangibles	—		3		6		19		—		12		44		—		84
Segment income (loss)	$	1,521	$	225	$	111	$	670	$	92	$	288	$	(138)	$	7	$	2,776
Net realized gains (losses)													(96)		(7)		(103)
Market risk benefits gains (losses)													(32)		—		(32)
Interest expense													174		—		174
Integration expenses													14		—		14
Income tax expense													413		—		413
Net income (loss)													$	(867)	$	—	$	2,040
Net loss attributable to noncontrolling interests													(3)		—		(3)
Net income (loss) attributable to Chubb													$	(864)	$	—	$	2,043


For the Nine Months Ended September 30, 2024 (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		Segment Measure Reclass		Chubb Consolidated



Net premiums written	$	15,690	$	4,911	$	2,386	$	10,536	$	1,122	$	4,765	$	—	$	—	$	39,410
Net premiums earned	14,890		4,560		2,173		9,966		950		4,709		—		—		37,248
Losses and loss expenses	9,640		2,654		1,785		4,728		492		86		161		(5)		19,541
Policy benefits	—		—		—		312		—		3,090		—		96		3,498
Policy acquisition costs	2,037		914		154		2,517		250		885		—		—		6,757
Administrative expenses	993		262		7		1,019		29		638		310		—		3,258
Underwriting income (loss)	2,220		730		227		1,390		179		10		(471)		(91)		4,194
Net investment income	2,620		322		62		836		179		738		(86)		(304)		4,367
Other (income) expense	28		—		1		14		—		(111)		(263)		(295)		(626)
Amortization expense of purchased intangibles	2		7		18		61		—		31		122		—		241
Segment income (loss)	$	4,810	$	1,045	$	270	$	2,151	$	358	$	828	$	(416)	$	(100)	$	8,946
Net realized gains (losses)													101		100		201
Market risk benefits gains (losses)													(238)		—		(238)
Interest expense													552		—		552
Integration expenses													21		—		21
Income tax expense													1,336		—		1,336
Net income (loss)													$	(2,462)	$	—	$	7,000
Net income attributable to noncontrolling interests													303		—		303
Net income (loss) attributable to Chubb													$	(2,765)	$	—	$	6,697


For the Nine Months Ended September 30, 2023 (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		Segment Measure Reclass		Chubb Consolidated



Net premiums written	$	14,575	$	4,404	$	2,581	$	9,359	$	831	$	4,015	$	—	$	—	$	35,765
Net premiums earned	13,710		4,084		2,334		9,005		720		3,962		—		—		33,815
Losses and loss expenses	8,625		2,634		2,003		4,139		319		87		133		(3)		17,937
Policy benefits	—		—		—		338		—		2,283		—		(56)		2,565
Policy acquisition costs	1,867		836		128		2,286		196		829		—		—		6,142
Administrative expenses	934		247		9		899		27		553		290		—		2,959
Underwriting income (loss)	2,284		367		194		1,343		178		210		(423)		59		4,212
Net investment income	2,204		262		43		636		144		525		28		(276)		3,566
Other (income) expense	18		2		—		(29)		(1)		(69)		(251)		(220)		(550)
Amortization expense of purchased intangibles	—		8		19		52		—		18		129		—		226
Segment income (loss)	$	4,470	$	619	$	218	$	1,956	$	323	$	786	$	(273)	$	3	$	8,102
Net realized gains (losses)													(481)		(3)		(484)
Market risk benefits gains (losses)													(154)		—		(154)
Interest expense													499		—		499
Integration expenses													51		—		51
Income tax expense													1,189		—		1,189
Net income (loss)													$	(2,647)	$	—	$	5,725
Net loss attributable to noncontrolling interests													(3)		—		(3)
Net income (loss) attributable to Chubb													$	(2,644)	$	—	$	5,728

Underwriting assets are reviewed in total by management for purposes of decision-making. Other than certain insurance related balances, Goodwill and Other intangible assets, Chubb does not allocate assets to its segments.

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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Earnings per share

9 Months Ended

Sep. 30, 2024

Earnings Per Share [Abstract]

Earnings per share


	Three Months Ended				Nine Months Ended
	September 30				September 30
(in millions of U.S. dollars, except share and per share data)	2024		2023		2024		2023
Numerator:
Net income	$	2,490	$	2,040	$	7,000	$	5,725
Net income (loss) attributable to noncontrolling interests	166		(3)		303		(3)
Net income attributable to Chubb	$	2,324	$	2,043	$	6,697	$	5,728
Denominator:
Denominator for basic earnings per share attributable to Chubb:
Weighted-average shares outstanding	403,831,412		409,505,454		404,700,118		412,076,470
Denominator for diluted earnings per share attributable to Chubb:
Share-based compensation plans	4,047,315		3,100,505		4,191,655		3,288,940
Weighted-average shares outstanding and assumed conversions	407,878,727		412,605,959		408,891,773		415,365,410
Basic earnings per share attributable to Chubb	$	5.75	$	4.99	$	16.55	$	13.90
Diluted earnings per share attributable to Chubb	$	5.70	$	4.95	$	16.38	$	13.79
Potential anti-dilutive share conversions	1,330,590		2,562,206		1,080,371		2,330,821

Excluded from weighted-average shares outstanding and assumed conversions is the impact of securities that would have been anti-dilutive during the respective periods. These securities consisted of stock options in which the underlying exercise prices were greater than the average market prices of our Common Shares. Refer to Note 16 to the Consolidated Financial Statements of our 2023 Form 10-K for additional information on stock options.

Pay vs Performance Disclosure - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pay vs Performance Disclosure
Net income (loss)	$ 2,324	$ 2,043	$ 6,697	$ 5,728

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-3

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Business Acquisition, Pro Forma Information

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Sep. 30, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

General and significant accounting policies (Policies)	9 Months Ended
General and significant accounting policies (Policies)	Sep. 30, 2024
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. Our results are reported 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 18 for additional information. The interim unaudited Consolidated Financial Statements include the accounts of Chubb Limited and its subsidiaries (collectively, Chubb, we, us, or our), over which Chubb exercises control, including Huatai Group, our majority-owned subsidiary, and minority-owned entities such as variable interest entities (VIEs) in which Chubb is considered the primary beneficiary. Noncontrolling interests on the Consolidated Financial Statements represent the portion of majority-owned subsidiaries and VIEs in which we do not have direct equity ownership. These interim unaudited Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) and, in the opinion of management, reflect all adjustments 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. On July 1, 2023, Chubb discontinued equity method accounting for its investment in Huatai Group upon obtaining a controlling interest and applied consolidation accounting. Therefore, effective July 1, 2023, business activity for, and the financial position of, Huatai Group is reported at 100 percent on the Consolidated Financial Statements. At September 30, 2024, and December 31, 2023, our aggregate ownership interest in Huatai Group was approximately 85.5 percent and 76.5 percent, respectively. The relevant amounts attributable to shareholders other than Chubb are reflected in the Consolidated Financial Statements under the captions Noncontrolling interests, Net income (loss) attributable to noncontrolling interests, and Comprehensive income (loss) attributable to noncontrolling interests. Refer to Note 2 for additional information on the acquisition of Huatai Group. Huatai Group's life insurance and asset management businesses are included in the Life Insurance segment, and Huatai Group's P&C business is included in the Overseas General Insurance segment. Results for Huatai Group's non-insurance operations, comprising real estate and holding company activity, are included in Corporate. 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 2023 Form 10-K.
Accounting guidance adopted in current year	New Accounting Pronouncements Accounting guidance not yet adopted Improvements to Reportable Segment Disclosures In November 2023, the Financial Accounting Standards Board (FASB) issued guidance that requires expanded reportable segment disclosures, primarily related to significant segment expenses which are regularly provided to the chief operating decision maker. The guidance is effective for fiscal years beginning after December 15, 2023, and interim periods within annual periods beginning after December 15, 2024. Retrospective application is required. We are currently evaluating the impact of this disclosure-only requirement. Improvements to Income Tax Disclosures In December 2023, the FASB issued guidance that requires expanded income tax disclosures, including the disaggregation of existing disclosures related to the tax rate reconciliation and income taxes paid. The guidance is effective for annual periods beginning after December 15, 2024. Prospective application is required, with retrospective application permitted. We are currently evaluating the impact of this disclosure-only requirement.

Fair value measurements (Fair Value Measurement Policy) (Policies)	9 Months Ended
	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Fair Value Measurement, Policy	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.

Acquisitions (Tables)

9 Months Ended

Sep. 30, 2024

Business Combinations [Abstract]

The following table presents supplemental unaudited pro forma consolidated information for the periods indicated as though the acquisition of a controlling majority interest in Huatai Group that occurred on July 1, 2023, had instead occurred on January 1, 2022. The unaudited pro forma consolidated financial information is presented for informational purposes only and is not necessarily indicative of the operating results that would have occurred had the acquisition of a controlling majority interest been consummated on January 1, 2022, nor is it necessarily indicative of future operating results. Significant assumptions used to determine pro forma operating results include amortization of VOBA and other intangible assets.


	Three Months Ended		Nine Months Ended
Pro forma:	September 30		September 30
(in millions of U.S. dollars)	2023		2023
Net premiums earned	$	12,674	$	34,605
Total revenues	$	13,755	$	37,589
Net income	$	1,905	$	5,595
Net income attributable to Chubb	$	1,912	$	5,587

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed

The following table summarizes the fair value of the assets acquired and liabilities assumed on July 1, 2023.


Huatai Group assets and liabilities consolidated	July 1
(in millions of U.S. dollars)	2023
Assets
Investments and Cash	$	13,346
Accrued investment income	60
Insurance and reinsurance balances receivable	277
Reinsurance recoverable on losses and loss expenses	581
Reinsurance recoverable on future policy benefits	27
Value of business acquired	309
Goodwill and intangible assets	5,113
Other assets	748
Total assets	$	20,461
Liabilities
Unpaid losses and loss expenses	$	831
Unearned premiums	800
Future policy benefits	2,351
Policyholders' account balances	4,014
Insurance and reinsurance balances payable	644
Accounts payable, accrued expenses, and other liabilities	682
Deferred tax liabilities	232
Repurchase agreements	1,269
Total liabilities	$	10,823

Net acquired assets, including goodwill, attributable to Chubb	4,428
Net acquired assets, attributable to noncontrolling interests	5,210
Net acquired assets, including goodwill	$	9,638

Schedule of Business Acquisitions, by Acquisition

The following table summarizes the results of the acquired Huatai Group operations that have been included within our Consolidated statements of operations for both the three and nine months ended September 30, 2023:


(in millions of U.S. dollars)
Total revenues	$	389
Net loss	$	(11)
Net loss attributable to Chubb	$	(9)

Investments (Tables)

9 Months Ended

Sep. 30, 2024

Investments, Debt and Equity Securities [Abstract]

Schedule Of Amortized Cost and Fair Value of Available-for-sale Securities


September 30, 2024	Amortized Cost		Valuation Allowance		Gross Unrealized Appreciation		Gross Unrealized Depreciation		Fair Value
(in millions of U.S. dollars)
Available-for-sale
U.S. Treasury / Agency	$	2,709	$	—	$	18	$	(98)	$	2,629
Non-U.S.	37,560		(23)		895		(931)		37,501
Corporate and asset-backed securities	47,588		(52)		736		(1,579)		46,693
Mortgage-backed securities	29,517		—		341		(1,384)		28,474
Municipal	2,067		—		18		(117)		1,968
	$	119,441	$	(75)	$	2,008	$	(4,109)	$	117,265


December 31, 2023	Amortized Cost		Valuation Allowance		Gross Unrealized Appreciation		Gross Unrealized Depreciation		Fair Value
(in millions of U.S. dollars)
Available-for-sale
U.S. Treasury / Agency	$	3,721	$	—	$	13	$	(144)	$	3,590
Non-U.S.	35,918		(49)		592		(1,297)		35,164
Corporate and asset-backed securities	44,695		(104)		390		(2,151)		42,830
Mortgage-backed securities	23,720		(3)		143		(1,802)		22,058
Municipal	3,074		—		10		(155)		2,929
	$	111,128	$	(156)	$	1,148	$	(5,549)	$	106,571

Schedule Of Fixed Maturities By Contractual Maturity

The following table presents fixed maturities by contractual maturity:


	September 30, 2024				December 31, 2023
(in millions of U.S. dollars)	Net Carrying Value		Fair Value		Net Carrying Value		Fair Value
Available-for-sale
Due in 1 year or less	$	4,536	$	4,536	$	4,729	$	4,729
Due after 1 year through 5 years	35,739		35,739		33,573		33,573
Due after 5 years through 10 years	28,913		28,913		28,480		28,480
Due after 10 years	19,603		19,603		17,731		17,731
	88,791		88,791		84,513		84,513
Mortgage-backed securities	28,474		28,474		22,058		22,058
	$	117,265	$	117,265	$	106,571	$	106,571

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 available-for-sale (AFS) fixed maturities in an unrealized loss position (including securities on loan) that are not deemed to have expected credit losses, 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
September 30, 2024	Fair Value		Gross Unrealized Loss		Fair Value		Gross Unrealized Loss		Fair Value		Gross Unrealized Loss
(in millions of U.S. dollars)
U.S. Treasury / Agency	$	—	$	—	$	1,677	$	(98)	$	1,677	$	(98)
Non-U.S.	1,706		(26)		13,628		(734)		15,334		(760)
Corporate and asset-backed securities	1,511		(13)		15,280		(959)		16,791		(972)
Mortgage-backed securities	664		(5)		13,684		(1,366)		14,348		(1,371)
Municipal	35		(1)		1,188		(114)		1,223		(115)
Total AFS fixed maturities	$	3,916	$	(45)	$	45,457	$	(3,271)	$	49,373	$	(3,316)


	0 – 12 Months				Over 12 Months				Total
December 31, 2023	Fair Value		Gross Unrealized Loss		Fair Value		Gross Unrealized Loss		Fair Value		Gross Unrealized Loss
(in millions of U.S. dollars)

U.S. Treasury / Agency	$	463	$	(9)	$	2,504	$	(135)	$	2,967	$	(144)
Non-U.S.	2,464		(43)		15,971		(957)		18,435		(1,000)
Corporate and asset-backed securities	2,866		(51)		20,334		(1,194)		23,200		(1,245)
Mortgage-backed securities	1,659		(58)		13,831		(1,706)		15,490		(1,764)
Municipal	1,117		(15)		1,310		(137)		2,427		(152)
Total AFS fixed maturities	$	8,569	$	(176)	$	53,950	$	(4,129)	$	62,519	$	(4,305)

Debt Securities, Available-for-sale, Allowance for Credit Loss

The following table presents a roll-forward of valuation allowance for expected credit losses on fixed maturities:


	Three Months Ended				Nine Months Ended
	September 30				September 30
(in millions of U.S. dollars)	2024		2023		2024		2023
Available-for-sale
Valuation allowance for expected credit losses - beginning of period	$	122	$	193	$	156	$	169


Provision for expected credit loss	23		34		95		172

Write-offs charged against the expected credit loss	(1)		(1)		(6)		(5)

Recovery of expected credit loss	(69)		(68)		(170)		(178)
Valuation allowance for expected credit losses - end of period	$	75	$	158	$	75	$	158
Held-to-maturity
Valuation allowance for expected credit losses - beginning of period	$	—	$	—	$	—	$	34





Recovery of expected credit loss	—		—		—		(34)
Valuation allowance for expected credit losses - end of period	$	—	$	—	$	—	$	—
Private debt held-for-investment
Valuation allowance for expected credit losses - beginning of period	$	5	$	—	$	4	$	—
Provision for expected credit loss	—		—		2		—
Recovery of expected credit loss	—		—		(1)		—
Valuation allowance for expected credit losses - end of period	$	5	$	—	$	5	$	—

Debt Securities, Held-to-maturity, Allowance for Credit Loss

The following table presents a roll-forward of valuation allowance for expected credit losses on fixed maturities:


	Three Months Ended				Nine Months Ended
	September 30				September 30
(in millions of U.S. dollars)	2024		2023		2024		2023
Available-for-sale
Valuation allowance for expected credit losses - beginning of period	$	122	$	193	$	156	$	169


Provision for expected credit loss	23		34		95		172

Write-offs charged against the expected credit loss	(1)		(1)		(6)		(5)

Recovery of expected credit loss	(69)		(68)		(170)		(178)
Valuation allowance for expected credit losses - end of period	$	75	$	158	$	75	$	158
Held-to-maturity
Valuation allowance for expected credit losses - beginning of period	$	—	$	—	$	—	$	34





Recovery of expected credit loss	—		—		—		(34)
Valuation allowance for expected credit losses - end of period	$	—	$	—	$	—	$	—
Private debt held-for-investment
Valuation allowance for expected credit losses - beginning of period	$	5	$	—	$	4	$	—
Provision for expected credit loss	—		—		2		—
Recovery of expected credit loss	—		—		(1)		—
Valuation allowance for expected credit losses - end of period	$	5	$	—	$	5	$	—

Private debt held-for-investment, allowance for credit loss

The following table presents a roll-forward of valuation allowance for expected credit losses on fixed maturities:


	Three Months Ended				Nine Months Ended
	September 30				September 30
(in millions of U.S. dollars)	2024		2023		2024		2023
Available-for-sale
Valuation allowance for expected credit losses - beginning of period	$	122	$	193	$	156	$	169


Provision for expected credit loss	23		34		95		172

Write-offs charged against the expected credit loss	(1)		(1)		(6)		(5)

Recovery of expected credit loss	(69)		(68)		(170)		(178)
Valuation allowance for expected credit losses - end of period	$	75	$	158	$	75	$	158
Held-to-maturity
Valuation allowance for expected credit losses - beginning of period	$	—	$	—	$	—	$	34





Recovery of expected credit loss	—		—		—		(34)
Valuation allowance for expected credit losses - end of period	$	—	$	—	$	—	$	—
Private debt held-for-investment
Valuation allowance for expected credit losses - beginning of period	$	5	$	—	$	4	$	—
Provision for expected credit loss	—		—		2		—
Recovery of expected credit loss	—		—		(1)		—
Valuation allowance for expected credit losses - end of period	$	5	$	—	$	5	$	—

Schedule of Realized Gain (Loss)

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


	Three Months Ended				Nine Months Ended
	September 30				September 30
(in millions of U.S. dollars)	2024		2023		2024		2023
Fixed maturities:
Gross realized gains	$	21	$	97	$	73	$	116
Gross realized losses	(91)		(184)		(338)		(456)
Other investments - Fixed maturities	152		(1)		452		(1)
Net (provision for) recovery of expected credit losses	48		34		80		44
Impairment (1)	(19)		(16)		(81)		(60)
Total fixed maturities	111		(70)		186		(357)
Equity securities	123		(100)		147		(61)
Private equities (less than 3 percent ownership)	(41)		40		39		75
Foreign exchange	(58)		(67)		(162)		(122)
Investment and embedded derivative instruments	66		9		6		(92)
Other derivative instruments	(2)		(7)		(7)		(6)
Other (2)	(1)		92		(8)		79
Net realized gains (losses) (pre-tax)	$	198	$	(103)	$	201	$	(484)

(1)Relates to certain securities we intended to sell and securities written to market entering default.

(2)The three and nine months ended September 30, 2023 includes a one-time realized gain of $116 million as a result of the consolidation of Huatai Group.

Gain (Loss) on Securities

Realized gains and losses from Equity securities, Other investments and Private equities from the table above include sales of securities and unrealized gains and losses from fair value changes as follows:


											Three Months Ended
													September 30
							2024								2023
(in millions of U.S. dollars)	Equity Securities		Other Investments		Private Equities		Total		Equity Securities		Other Investments		Private Equities		Total
Net gains (losses) recognized during the period	$	123	$	152	$	(41)	$	234	$	(100)	$	(1)	$	40	$	(61)
Less: Net gains (losses) recognized from sales of securities	(6)		2		—		(4)		(45)		—		—		(45)
Unrealized gains (losses) recognized for securities still held at reporting date	$	129	$	150	$	(41)	$	238	$	(55)	$	(1)	$	40	$	(16)


													Nine Months Ended
													September 30
							2024								2023
(in millions of U.S. dollars)	Equity Securities		Other Investments		Private Equities		Total		Equity Securities		Other Investments		Private Equities		Total
Net gains (losses) recognized during the period	$	147	$	452	$	39	$	638	$	(61)	$	(1)	$	75	$	13
Less: Net gains (losses) recognized from sales of securities	5		2		—		7		(48)		—		—		(48)
Unrealized gains (losses) recognized for securities still held at reporting date	$	142	$	450	$	39	$	631	$	(13)	$	(1)	$	75	$	61

Fair Value, Investments, Entities that Calculate Net Asset Value Per Share


	Expected Liquidation Period of Underlying Assets	September 30, 2024				December 31, 2023
(in millions of U.S. dollars)		Fair Value		Maximum Future Funding Commitments		Fair Value		Maximum Future Funding Commitments
Financial	2 to 10 Years	$	1,247	$	316	$	1,241	$	364
Real assets	2 to 13 Years	2,006		588		2,137		445
Distressed	2 to 8 Years	1,257		822		1,206		936
Private credit	3 to 8 Years	316		288		331		298
Traditional	2 to 14 Years	9,307		4,767		8,873		4,167
Vintage	1 to 3 Years	59		—		72		—
Investment funds	Not Applicable	213		—		218		—
		$	14,405	$	6,781	$	14,078	$	6,210

Schedule Of Components Of Restricted Assets

The following table presents the components of restricted assets:


	September 30		December 31
(in millions of U.S. dollars)	2024		2023
Trust funds	$	9,137	$	8,482
Assets pledged under repurchase agreements	3,273		2,924
Deposits with U.S. regulatory authorities	2,565		2,544

Deposits with non-U.S. regulatory authorities and other	4,714		4,464

Total	$	19,689	$	18,414

Fair value measurements (Tables)

9 Months Ended

Sep. 30, 2024

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


September 30, 2024	Level 1		Level 2		Level 3		Total
(in millions of U.S. dollars)
Assets:
Fixed maturities available-for-sale
U.S. Treasury / Agency	$	1,979	$	650	$	—	$	2,629
Non-U.S.	—		36,862		639		37,501
Corporate and asset-backed securities	—		43,915		2,778		46,693
Mortgage-backed securities	—		28,428		46		28,474
Municipal	—		1,968		—		1,968
	1,979		111,823		3,463		117,265
Equity securities	4,286		—		118		4,404
Short-term investments	2,491		1,869		15		4,375
Other investments (1)	616		6,424		—		7,040
Securities lending collateral	—		1,927		—		1,927
Investment derivatives	42		—		—		42
Derivatives designated as hedging instruments	—		150		—		150

Separate account assets	5,919		77		—		5,996
Total assets measured at fair value (1)(2)	$	15,333	$	122,270	$	3,596	$	141,199
Liabilities:
Investment derivatives	$	127	$	—	$	—	$	127
Derivatives designated as hedging instruments	—		174		—		174
Other derivative instruments	25		5		—		30
Market risk benefits (3)	—		—		748		748
Total liabilities measured at fair value	$	152	$	179	$	748	$	1,079

(1)Excluded from the table above are other investments of $1,115 million, principally policy loans, measured using NAV as a practical expedient.

(2)Excluded from the table above are private equities of $14,405 million, measured using NAV as a practical expedient.

(3)Refer to Note 11 for additional information on Market risk benefits.


December 31, 2023	Level 1		Level 2		Level 3		Total
(in millions of U.S. dollars)
Assets:
Fixed maturities available-for-sale
U.S. Treasury / Agency	$	2,911	$	679	$	—	$	3,590
Non-U.S.	—		34,472		692		35,164
Corporate and asset-backed securities	—		40,208		2,622		42,830
Mortgage-backed securities	—		22,051		7		22,058
Municipal	—		2,929		—		2,929
	2,911		100,339		3,321		106,571
Equity securities	3,368		—		87		3,455
Short-term investments	1,915		2,633		3		4,551
Other investments (1)	589		4,236		—		4,825
Securities lending collateral	—		1,299		—		1,299
Investment derivatives	54		—		—		54
Derivatives designated as hedging instruments	—		136		—		136

Separate account assets	5,482		91		—		5,573
Total assets measured at fair value (1)(2)	$	14,319	$	108,734	$	3,411	$	126,464
Liabilities:
Investment derivatives	$	136	$	—	$	—	$	136
Derivatives designated as hedging instruments	—		128		—		128
Other derivative instruments	37		5		—		42
Market risk benefits (3)	—		—		771		771
Total liabilities measured at fair value	$	173	$	133	$	771	$	1,077

(1)Excluded from the table above are other investments of $702 million, principally policy loans, measured using NAV as a practical expedient.

(2)Excluded from the table above are private equities of $14,078 million, measured using NAV as a practical expedient.

(3)Refer to Note 11 for additional information on Market risk benefits.

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation

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).



Three Months Ended September 30, 2024 (in millions of U.S. dollars)	Available-for-Sale Debt Securities						Equity securities	Short-term investments
	Non-U.S.		Corporate and asset- backed securities		Mortgage-backed securities

Balance, beginning of period	$	632	$	2,709	$	20		$	100	$	12

Transfers out of Level 3	(1)		—		(14)			—		—
Change in Net Unrealized Gains (Losses) in OCI	10		16		—			—		(1)
Net Realized Gains (Losses)	(1)		(10)		—			7		—
Purchases	59		316		40			17		6
Sales	(18)		(69)		—			(6)		(1)
Settlements	(42)		(184)		—			—		(1)

Balance, end of period	$	639	$	2,778	$	46		$	118	$	15
Net Realized Gains (Losses) Attributable to Changes in Fair Value at the Balance Sheet date	$	—	$	(8)	$	—		$	6	$	—
Change in Net Unrealized Gains (Losses) included in OCI at the Balance Sheet date	$	11	$	12	$	—		$	—	$	(1)



Three Months Ended September 30, 2023 (in millions of U.S. dollars)		Available-for-Sale Debt Securities								Equity securities		Short-term investments
	Non-U.S.			Corporate and asset- backed securities			Mortgage-backed securities

Balance, beginning of period		$	649		$	2,524		$	10	$	86	$	3

Transfers out of Level 3		(22)			(10)			—		—		—
Change in Net Unrealized Gains (Losses) in OCI		(6)			6			—		—		—

Net Realized Gains (Losses)		(2)			(4)			—		—		—

Purchases		46			158			16		4		—
Sales		(17)			(40)			—		(5)		(1)
Settlements		(15)			(65)			(1)		—		—
Balance, end of period		$	633		$	2,569		$	25	$	85	$	2
Net Realized Gains (Losses) Attributable to Changes in Fair Value at the Balance Sheet date		$	(1)		$	(4)		$	—	$	—	$	—
Change in Net Unrealized Gains (Losses) included in OCI at the Balance Sheet date		$	(8)		$	4		$	—	$	—	$	—



Nine Months Ended September 30, 2024 (in millions of U.S. dollars)	Available-for-Sale Debt Securities						Equity securities			Short-term investments
	Non-U.S.		Corporate and asset- backed securities		Mortgage-backed securities

Balance, beginning of period	$	692	$	2,622	$	7		$	87		$	3
Transfers into Level 3	1		5		—			—			—
Transfers out of Level 3	(7)		(3)		(14)			—			—
Change in Net Unrealized Gains (Losses) in OCI	18		26		—			—			(2)
Net Realized Gains (Losses)	(5)		(15)		—			6			—
Purchases	214		785		55			36			22
Sales	(69)		(176)		—			(11)			(1)
Settlements	(205)		(466)		(2)			—			(7)

Balance, end of period	$	639	$	2,778	$	46		$	118		$	15
Net Realized Gains (Losses) Attributable to Changes in Fair Value at the Balance Sheet date	$	(1)	$	(10)	$	—		$	5		$	—
Change in Net Unrealized Gains (Losses) included in OCI at the Balance Sheet date	$	14	$	17	$	—		$	—		$	(2)



Nine Months Ended September 30, 2023 (in millions of U.S. dollars)		Available-for-Sale Debt Securities								Equity securities		Short-term investments
	Non-U.S.			Corporate and asset- backed securities			Mortgage-backed securities

Balance, beginning of period		$	564		$	2,449		$	11	$	90	$	3
Transfers into Level 3		21			3			—		—		—
Transfers out of Level 3		(22)			(23)			—		—		—
Change in Net Unrealized Gains (Losses) in OCI		5			8			—		—		(1)
Net Realized Gains (Losses)		(3)			(7)			—		(6)		—

Purchases		151			481			16		15		3
Sales		(52)			(70)			—		(14)		(3)
Settlements		(31)			(272)			(2)		—		—

Balance, end of period		$	633		$	2,569		$	25	$	85	$	2
Net Realized Gains (Losses) Attributable to Changes in Fair Value at the Balance Sheet date		$	(1)		$	(6)		$	—	$	(6)	$	—
Change in Net Unrealized Gains (Losses) included in OCI at the Balance Sheet date		$	1		$	2		$	—	$	—	$	—

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:


September 30, 2024	Fair Value								Net Carrying Value
(in millions of U.S. dollars)	Level 1		Level 2		Level 3		Total
Assets:
Private debt held-for-investment	$	—	$	—	$	2,650	$	2,650	$	2,619
Total assets	$	—	$	—	$	2,650	$	2,650	$	2,619
Liabilities:
Repurchase agreements	$	—	$	3,048	$	—	$	3,048	$	3,048
Short-term debt	—		1,560		—		1,560		1,571
Long-term debt	—		13,645		—		13,645		14,560
Trust preferred securities	—		377		—		377		309
Total liabilities	$	—	$	18,630	$	—	$	18,630	$	19,488


December 31, 2023	Fair Value								Net Carrying Value
(in millions of U.S. dollars)	Level 1		Level 2		Level 3		Total
Assets:
Private debt held-for-investment	$	—	$	—	$	2,560	$	2,560	$	2,553
Total assets	$	—	$	—	$	2,560	$	2,560	$	2,553
Liabilities:
Repurchase agreements	$	—	$	2,833	$	—	$	2,833	$	2,833
Short-term debt	—		1,431		—		1,431		1,460
Long-term debt	—		11,924		—		11,924		13,035
Trust preferred securities	—		365		—		365		308
Total liabilities	$	—	$	16,553	$	—	$	16,553	$	17,636

schedule of reinsurance recoverable on ceded insurance

Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.

+ References + Details

Reinsurance (Tables)

9 Months Ended

Sep. 30, 2024

Reinsurance Disclosures [Abstract]


	September 30, 2024				December 31, 2023
(in millions of U.S. dollars)	Net Reinsurance Recoverable (1)		Valuation allowance		Net Reinsurance Recoverable (1)		Valuation allowance
Reinsurance recoverable on unpaid losses and loss expenses	$	17,631	$	307	$	17,884	$	285
Reinsurance recoverable on paid losses and loss expenses	1,975		81		2,068		82
Reinsurance recoverable on losses and loss expenses	$	19,606	$	388	$	19,952	$	367
Reinsurance recoverable on policy benefits	$	292	$	—	$	280	$	—

(1)Net of valuation allowance for uncollectible reinsurance.

Reinsurance Recoverable, Allowance for Credit Loss [Table Text Block]

The following table presents a roll-forward of valuation allowance for uncollectible reinsurance related to Reinsurance recoverable on losses and loss expenses:


	Nine Months Ended
	September 30
(in millions of U.S. dollars)	2024		2023
Valuation allowance for uncollectible reinsurance - beginning of period	$	367	$	351
Provision for uncollectible reinsurance	24		27
Write-offs charged against the valuation allowance	(4)		(8)
Foreign exchange revaluation	1		—

Valuation allowance for uncollectible reinsurance - end of period	$	388	$	370

Deferred acquisition costs (Tables)

9 Months Ended

Sep. 30, 2024

Deferred Policy Acquisition Costs Disclosures [Abstract]

Deferred Policy Acquisition Costs

The following tables present a roll-forward of deferred policy acquisition costs on long-duration contracts included in the Life Insurance segment:


	Nine Months Ended September 30, 2024

(in millions of U.S. dollars)	Term Life		Universal Life		Whole Life		A&H		Other		Total
Balance – beginning of period	$	402	$	674	$	534	$	1,301	$	274	$	3,185

Capitalizations	149		109		276		467		53		1,054
Amortization expense	(89)		(60)		(27)		(132)		(20)		(328)

Other (including foreign exchange)	(1)		(2)		2		(8)		(3)		(12)
Balance – end of period	$	461	$	721	$	785	$	1,628	$	304	$	3,899
Overseas General Insurance segment excluded from table											615
Total deferred policy acquisition costs on long-duration contracts											$	4,514
Deferred policy acquisition costs on short-duration contracts											3,735
Total deferred policy acquisition costs											$	8,249


	Nine Months Ended September 30, 2023

(in millions of U.S. dollars)	Term Life		Universal Life		Whole Life		A&H		Other		Total
Balance – beginning of period	$	324	$	639	$	392	$	891	$	268	$	2,514

Capitalizations	131		85		103		396		27		742
Amortization expense	(76)		(55)		(18)		(98)		(19)		(266)

Other (including foreign exchange)	(2)		(18)		3		(19)		(2)		(38)
Balance – end of period	$	377	$	651	$	480	$	1,170	$	274	$	2,952
Overseas General Insurance segment excluded from table											621
Total deferred policy acquisition costs on long-duration contracts											$	3,573
Deferred policy acquisition costs on short-duration contracts											3,283
Total deferred policy acquisition costs											$	6,856

Goodwill (Tables)

9 Months Ended

Sep. 30, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill roll-forward by business segment

The following table presents a roll-forward of Goodwill by segment:


(in millions of U.S. dollars)	North America Commercial P&C Insurance		North America Personal P&C Insurance		North America Agricultural Insurance		Overseas General Insurance		Global Reinsurance		Life Insurance		Chubb Consolidated
Balance at December 31, 2023	$	6,946	$	2,231	$	134	$	5,262	$	371	$	4,742	$	19,686
Acquisition of Healthy Paws	256		—		—		—		—		—		256
Measurement-period adjustments	—		—		—		—		—		65		65
Foreign exchange revaluation	(2)		(1)		—		(43)		—		29		(17)
Balance at September 30, 2024 (1)	$	7,200	$	2,230	$	134	$	5,219	$	371	$	4,836	$	19,990

(1)Includes $509 million attributable to noncontrolling interests.

Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 24
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482548/350-20-55-24

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1A

Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-2

Liability for Future Policy Benefits and Unpaid Claims and Claims Adjustment Expense [Abstract]

Unpaid losses and loss expenses, and Future policy benefits (Tables)

9 Months Ended

Sep. 30, 2024

Schedule of Unpaid Losses And Loss Expenses Roll Forward [Table Text Block]

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


	Nine Months Ended
	September 30
(in millions of U.S. dollars)	2024		2023

Gross unpaid losses and loss expenses – beginning of period	$	80,122	$	75,747
Reinsurance recoverable on unpaid losses and loss expenses – beginning of period (1)	(17,884)		(17,086)
Net unpaid losses and loss expenses – beginning of period	62,238		58,661
Net losses and loss expenses incurred in respect of losses occurring in:
Current year	20,302		18,604
Prior years (2)	(761)		(667)
Total	19,541		17,937
Net losses and loss expenses paid in respect of losses occurring in:
Current year	5,005		4,853
Prior years	10,074		10,158
Total	15,079		15,011
Consolidation of Huatai Group	—		405
Foreign currency revaluation and other	(5)		(95)
Net unpaid losses and loss expenses – end of period	66,695		61,897
Reinsurance recoverable on unpaid losses and loss expenses (1)	17,631		17,808
Gross unpaid losses and loss expenses – end of period	$	84,326	$	79,705

(1) Net of valuation allowance for uncollectible reinsurance.

(2) Relates to prior period loss reserve development only and excludes prior period development related to reinstatement premiums, expense adjustments, earned premiums, and A&H long-duration lines totaling $118 million and $71 million for the nine months ended September 30, 2024 and 2023, respectively.

Prior Period Development, by Segment [Table Text Block]

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


	Three Months Ended September 30						Nine Months Ended September 30
(in millions of U.S. dollars)	Long-tail		Short-tail		Total		Long-tail		Short-tail		Total
2024
North America Commercial P&C Insurance	$	125	$	(164)	$	(39)	$	79	$	(310)	$	(231)
North America Personal P&C Insurance	—		(189)		(189)		—		(305)		(305)
North America Agricultural Insurance	—		(6)		(6)		—		(34)		(34)
Overseas General Insurance	(61)		1		(60)		(26)		(184)		(210)
Global Reinsurance	(5)		—		(5)		—		(20)		(20)
Corporate	55		—		55		157		—		157
Total	$	114	$	(358)	$	(244)	$	210	$	(853)	$	(643)
2023
North America Commercial P&C Insurance	$	107	$	(191)	$	(84)	$	(23)	$	(279)	$	(302)
North America Personal P&C Insurance	—		(119)		(119)		—		(135)		(135)
North America Agricultural Insurance	—		(9)		(9)		—		(12)		(12)
Overseas General Insurance	(52)		3		(49)		(52)		(201)		(253)
Global Reinsurance	—		—		—		7		(32)		(25)
Corporate	61		—		61		131		—		131
Total	$	116	$	(316)	$	(200)	$	63	$	(659)	$	(596)

Liability for Future Policy Benefit, Activity

The following tables present a roll-forward of the liability for future policy benefits included in the Life Insurance segment:


Present Value of Expected Net Premiums	Nine Months Ended September 30, 2024
(in millions of U.S. dollars)	Term Life		Whole Life		A&H		Other		Total
Balance – beginning of period	$	1,590	$	3,950	$	10,432	$	64	$	16,036
Beginning balance at original discount rate	1,992		3,945		10,692		64		16,693
Effect of changes in cash flow assumptions	(140)		160		394		(4)		410
Effect of actual variances from expected experience	6		9		(126)		(1)		(112)
Adjusted beginning of period balance	1,858		4,114		10,960		59		16,991

Issuances	161		942		1,717		53		2,873
Interest accrual	45		91		424		3		563
Net premiums collected (1)	(183)		(852)		(1,105)		(27)		(2,167)

Other (including foreign exchange)	(10)		14		(158)		14		(140)
Ending balance at original discount rate	1,871		4,309		11,838		102		18,120
Effect of changes in discount rate assumptions	(287)		94		136		1		(56)
Balance – end of period	$	1,584	$	4,403	$	11,974	$	103	$	18,064

(1)Net premiums collected represent the portion of gross premiums collected from policyholders that is used to fund expected benefit.


Present Value of Expected Future Policy Benefits	Nine Months Ended September 30, 2024
(in millions of U.S. dollars)	Term Life		Whole Life		A&H		Other		Total
Balance – beginning of period	$	2,254	$	10,063	$	14,650	$	495	$	27,462
Beginning balance at original discount rate	2,749		9,991		15,071		492		28,303
Effect of changes in cash flow assumptions	(137)		181		348		(5)		387
Effect of actual variances from expected experience	13		21		(127)		—		(93)
Adjusted beginning of period balance	2,625		10,193		15,292		487		28,597

Issuances	161		942		1,717		53		2,873
Interest accrual	59		240		519		11		829
Benefits payments	(173)		(260)		(1,186)		(14)		(1,633)

Other (including foreign exchange)	27		55		(188)		41		(65)
Ending balance at original discount rate	2,699		11,170		16,154		578		30,601
Effect of changes in discount rate assumptions	(390)		739		65		41		455
Balance – end of period	$	2,309	$	11,909	$	16,219	$	619	$	31,056


Liability for Future Policy Benefits, Life Insurance Segment	September 30, 2024
(in millions of U.S. dollars)	Term Life		Whole Life		A&H		Other		Total
Net liability for future policy benefits	$	725	$	7,506	$	4,245	$	516	$	12,992
Deferred profit liability	276		1,120		194		32		1,622
Net liability for future policy benefits, before reinsurance recoverable	1,001		8,626		4,439		548		14,614
Less: Reinsurance recoverable on future policy benefits	109		45		112		—		266
Net liability for future policy benefits, after reinsurance recoverable	$	892	$	8,581	$	4,327	$	548	$	14,348
Weighted average duration (years)	10.2		27.8		9.8		17.6		21.1


Present Value of Expected Net Premiums	Nine Months Ended September 30, 2023
(in millions of U.S. dollars)	Term Life		Whole Life		A&H		Other		Total
Balance – beginning of period	$	1,806	$	2,308	$	10,711	$	42	$	14,867
Beginning balance at original discount rate	1,867		2,361		11,258		43		15,529
Effect of changes in cash flow assumptions	36		40		(813)		2		(735)
Effect of actual variances from expected experience	(15)		77		(170)		(1)		(109)
Adjusted beginning of period balance	1,888		2,478		10,275		44		14,685
Consolidation of Huatai Group	3		1,690		145		12		1,850
Issuances	90		223		1,026		5		1,344
Interest accrual	45		62		421		1		529
Net premiums collected (1)	(127)		(376)		(998)		(15)		(1,516)


Other (including foreign exchange)	78		(72)		(592)		(1)		(587)
Ending balance at original discount rate	1,977		4,005		10,277		46		16,305
Effect of changes in discount rate assumptions	(69)		(62)		(496)		(1)		(628)
Balance – end of period	$	1,908	$	3,943	$	9,781	$	45	$	15,677

(1)Net premiums collected represent the portion of gross premiums collected from policyholders that is used to fund expected benefit.


Present Value of Expected Future Policy Benefits	Nine Months Ended September 30, 2023
(in millions of U.S. dollars)	Term Life		Whole Life		A&H		Other		Total
Balance – beginning of period	$	2,321	$	5,696	$	15,038	$	269	$	23,324
Beginning balance at original discount rate	2,447		5,874		15,855		280		24,456
Effect of changes in cash flow assumptions	32		44		(849)		3		(770)
Effect of actual variances from expected experience	(12)		86		(168)		(1)		(95)
Adjusted beginning of period balance	2,467		6,004		14,838		282		23,591
Consolidation of Huatai Group	17		3,659		163		233		4,072
Issuances	90		223		1,026		5		1,344
Interest accrual	54		176		514		6		750
Benefit payments	(120)		(212)		(1,064)		(9)		(1,405)

Other (including foreign exchange)	227		30		(1,062)		154		(651)
Ending balance at original discount rate	2,735		9,880		14,415		671		27,701
Effect of changes in discount rate assumptions	(149)		(274)		(790)		(11)		(1,224)
Balance – end of period	$	2,586	$	9,606	$	13,625	$	660	$	26,477


Liability for Future Policy Benefits, Life Insurance Segment	September 30, 2023
(in millions of U.S. dollars)	Term Life		Whole Life		A&H		Other		Total
Net liability for future policy benefits	$	678	$	5,663	$	3,844	$	615	$	10,800
Deferred profit liability	244		709		156		14		1,123
Net liability for future policy benefits, before reinsurance recoverable	922		6,372		4,000		629		11,923
Less: Reinsurance recoverable on future policy benefits	111		47		103		21		282
Net liability for future policy benefits, after reinsurance recoverable	$	811	$	6,325	$	3,897	$	608	$	11,641
Weighted average duration (years)	10.2		26.5		10.3		15.1		19.6

The following table presents a reconciliation of the roll-forwards above to the Future policy benefits liability presented in the Consolidated balance sheets.


	September 30
(in millions of U.S. dollars)	2024		2023
Net liability for future policy benefits, Life Insurance segment	$	12,992	$	10,800
Other (1)	1,389		1,186
Deferred profit liability	1,622		1,123
Liability for future policy benefits, per consolidated balance sheet	$	16,003	$	13,109

(1)Other business principally comprises certain Overseas General Insurance accident and health (A&H) policies and certain Chubb Life Re business.

The following table presents the amount of undiscounted and discounted expected gross premiums and expected future policy benefit payments included in the Life Insurance segment:


	September 30		September 30
(in millions of U.S. dollars)	2024		2023

Term Life
Undiscounted expected future benefit payments	$	4,188	$	4,043
Undiscounted expected future gross premiums	6,669		6,588
Discounted expected future benefit payments	2,309		2,586
Discounted expected future gross premiums	4,504		3,741
Whole Life
Undiscounted expected future benefit payments	28,111		23,454
Undiscounted expected future gross premiums	10,363		9,478
Discounted expected future benefit payments	11,909		9,606
Discounted expected future gross premiums	8,404		7,654
A&H
Undiscounted expected future benefit payments	27,423		23,914
Undiscounted expected future gross premiums	40,183		35,029
Discounted expected future benefit payments	16,219		13,625
Discounted expected future gross premiums	23,655		21,241
Other
Undiscounted expected future benefit payments	1,046		774
Undiscounted expected future gross premiums	200		104
Discounted expected future benefit payments	619		660
Discounted expected future gross premiums	$	177	$	92

The following table presents the amount of revenue and interest recognized in the Consolidated statements of operations for the Life Insurance segment:


	Gross Premiums or Assessments				Interest Accretion
	Nine Months Ended				Nine Months Ended
	September 30				September 30
(in millions of U.S. dollars)	2024		2023		2024		2023
Life Insurance
Term Life	$	509	$	484	$	14	$	9

Whole Life	1,504		864		149		114
A&H	2,250		2,182		95		93
Other	42		28		8		5
Total	$	4,305	$	3,558	$	266	$	221

The following table presents the weighted-average interest rates for the Life Insurance segment:


	Interest Accretion Rate				Current Discount Rate

	September 30				September 30
	2024		2023		2024		2023
Life Insurance
Term Life	3.0	%	2.9	%	5.2	%	6.0	%

Whole Life	3.2	%	3.2	%	4.1	%	4.7	%
A&H	3.8	%	3.7	%	5.8	%	6.7	%
Other	2.7	%	2.6	%	3.8	%	4.3	%

Policyholders' account balances, Separate accounts, and Unearned revenue liabilities (Tables)

9 Months Ended

Sep. 30, 2024

Policyholder Account Balance [Abstract]

Policyholder Account Balances

Policyholders' account balances

The following tables present a roll-forward of policyholders' account balances:


	Nine Months Ended September 30, 2024
(in millions of U.S. dollars)	Universal Life		Annuities (2)		Other (3)		Total
Balance – beginning of period	$	1,876	$	2,411	$	2,502	$	6,789


Premiums received	204		294		320		818
Policy charges (1)	(98)		—		(7)		(105)
Surrenders and withdrawals	(95)		(30)		(202)		(327)
Benefit payments (4)	(59)		(116)		(40)		(215)

Interest credited	38		29		41		108
Other (including foreign exchange)	3		20		(223)		(200)
Balance – end of period	$	1,869	$	2,608	$	2,391	$	6,868
Unearned revenue liability							712
Other							556
Policyholders' account liability, per consolidated balance sheet							$	8,136

(1)Contracts included in the policyholder account balances are generally charged a premium and/or monthly assessments on the basis of the account balance.

(2)Relates to Huatai Life.

(3)Primarily comprises policyholder account balances related to investment linked products including endowment and investment contracts, none of which bear significant insurance risk.

(4)Includes benefit payments upon maturity as well as death benefits.


	Nine Months Ended September 30, 2023
(in millions of U.S. dollars)	Universal Life		Annuities (2)		Other (3)		Total
Balance – beginning of period	$	1,199	$	—	$	1,374	$	2,573
Consolidation of Huatai Group	602		2,325		1,087		4,014

Premiums received	174		79		165		418
Policy charges (1)	(96)		—		(8)		(104)
Surrenders and withdrawals	(62)		(8)		(113)		(183)
Benefit payments (4)	(6)		(38)		(43)		(87)

Interest credited	30		16		22		68
Other (including foreign exchange)	(56)		(34)		(35)		(125)
Balance – end of period	$	1,785	$	2,340	$	2,449	$	6,574
Unearned revenue liability							604
Policyholders' account liability, per consolidated balance sheet							$	7,178

(1)Contracts included in the policyholder account balances are generally charged a premium and/or monthly assessments on the basis of the account balance.

(2)Relates to Huatai Life.

(3)Primarily comprises policyholder account balances related to investment linked products including endowment and investment contracts, none of which bear significant insurance risk.

(4)Includes benefit payments upon maturity as well as death benefits.



	September 30
	2024									2023
(in millions of U.S. dollars, except for percentages)	Universal Life			Annuities			Other			Universal Life			Annuities			Other
Weighted-average crediting rate	2.7		%	1.6		%	2.7		%	3.1		%	2.7		%	1.2		%
Net amount at risk (1)	$	12,648		$	—		$	440		$	11,705		$	—		$	576
Cash Surrender Value	$	1,699		$	1,691		$	2,091		$	1,573		$	1,474		$	2,173

(1)For those guarantees of benefits that are payable in the event of death, the net amount at risk is defined as the current guaranteed minimum death benefit in excess of the current account balance at the balance sheet date.

Policyholder Account Balance, Guaranteed Minimum Crediting Rates

The following tables present the balance of account values by range of guaranteed minimum crediting rates and the related range of difference, in basis points, between rates being credited to policyholders and the respective guaranteed minimum:

Universal Life


	September 30, 2024
(in millions of U.S. dollars)	At Guaranteed Minimum		1 Basis Point - 50 Basis Points Above		51 Basis Points - 150 Basis Points Above		Greater Than 150 Basis Points Above		Total
Guaranteed minimum crediting rates
Up to 2.00%	$	464	$	—	$	47	$	92	$	603
2.01% – 4.00%	249		371		633		—		1,253
Greater than 4.00%	13		—		—		—		13
Total	$	726	$	371	$	680	$	92	$	1,869


	September 30, 2023
(in millions of U.S. dollars)	At Guaranteed Minimum		1 Basis Point - 50 Basis Points Above		51 Basis Points - 150 Basis Points Above		Greater Than 150 Basis Points Above		Total
Guaranteed minimum crediting rates
Up to 2.00%	$	421	$	—	$	30	$	11	$	462
2.01% – 4.00%	80		330		559		333		1,302
Greater than 4.00%	21		—		—		—		21
Total	$	522	$	330	$	589	$	344	$	1,785

Annuities


	September 30, 2024
(in millions of U.S. dollars)	At Guaranteed Minimum		1 Basis Point - 50 Basis Points Above		51 Basis Points - 150 Basis Points Above		Greater Than 150 Basis Points Above		Total
Guaranteed minimum crediting rates
Up to 2.00%	$	72	$	—	$	1,645	$	47	$	1,764
2.01% – 4.00%	844		—		—		—		844
Greater than 4.00%	—		—		—		—		—
Total	$	916	$	—	$	1,645	$	47	$	2,608


	September 30, 2023
(in millions of U.S. dollars)	At Guaranteed Minimum		1 Basis Point - 50 Basis Points Above		51 Basis Points - 150 Basis Points Above		Greater Than 150 Basis Points Above		Total
Guaranteed minimum crediting rates
Up to 2.00%	$	693	$	—	$	1,543	$	—	$	2,236
2.01% – 4.00%	104		—		—		—		104
Greater than 4.00%	—		—		—		—		—
Total	$	797	$	—	$	1,543	$	—	$	2,340

Other policyholders' account balances


	September 30, 2024
(in millions of U.S. dollars)	At Guaranteed Minimum		1 Basis Point - 50 Basis Points Above		51 Basis Points - 150 Basis Points Above		Greater Than 150 Basis Points Above		Total
Guaranteed minimum crediting rates
Up to 2.00%	$	349	$	2	$	214	$	459	$	1,024
2.01% – 4.00%	1,317		50		—		—		1,367
Greater than 4.00%	—		—		—		—		—
Total	$	1,666	$	52	$	214	$	459	$	2,391


	September 30, 2023
(in millions of U.S. dollars)	At Guaranteed Minimum		1 Basis Point - 50 Basis Points Above		51 Basis Points - 150 Basis Points Above		Greater Than 150 Basis Points Above		Total
Guaranteed minimum crediting rates
Up to 2.00%	$	738	$	—	$	230	$	545	$	1,513
2.01% – 4.00%	373		531		27		—		931
Greater than 4.00%	5		—		—		—		5
Total	$	1,116	$	531	$	257	$	545	$	2,449

Fair Value, Separate Account Investment

The following table presents the aggregate fair value of Separate account assets, by major security type:


	September 30		September 30
(in millions of U.S. dollars)	2024		2023
Cash and cash equivalents	$	75	$	88

Mutual funds	5,844		5,129

Fixed maturities	77		89

Total	$	5,996	$	5,306

Separate Account, Liability

The following table presents a roll-forward of separate account liabilities:


	Nine Months Ended
	September 30
(in millions of U.S. dollars)	2024		2023
Balance – beginning of period	$	5,573	$	5,190

Premiums and deposits	945		724
Policy charges	(118)		(103)
Surrenders and withdrawals	(666)		(407)
Benefit payments	(320)		(291)
Investment performance	625		382

Other (including foreign exchange)	(43)		(189)
Balance – end of period	$	5,996	$	5,306
Cash surrender value (1)	$	5,790	$	5,285

(1)Cash surrender value represents the amount of the policyholders account balances distributable at the balance sheet date less certain surrender charges.

Unearned revenue liabilities

The following table presents a roll-forward of unearned revenue liabilities:


	Nine Months Ended
	September 30
(in millions of U.S. dollars)	2024		2023
Balance – beginning of period	$	673	$	567
Deferred revenue	106		96
Amortization	(54)		(44)

Other (including foreign exchange)	(13)		(15)
Balance – end of period	$	712	$	604

Market risk benefits (Tables)

9 Months Ended

Sep. 30, 2024

Market Risk Benefit [Abstract]

Market Risk Benefit, Activity

The following table presents a roll-forward of MRB:


	Nine Months Ended September 30
(in millions of U.S. dollars)	2024		2023
Balance – beginning of period	$	771	$	800
Balance, beginning of period, before effect of changes in the instrument-specific credit risk	749		776



Interest rate changes	10		(117)
Effect of changes in equity markets	(147)		(69)
Effect of changes in volatilities	9		51
Actual policyholder behavior different from expected behavior	55		16
Effect of changes in future expected policyholder behavior	87		89

Effect of timing and all other	(34)		3
Balance, end of period, before effect of changes in the instrument-specific credit risk	$	729	$	749
Effect of changes in the instrument-specific credit risk	19		21
Balance – end of period	$	748	$	770
Weighted-average age of policyholders (years)	74		73
Net amount at risk (1)	$	1,595	$	2,138

(1) The net amount at risk is defined as the present value of future claim payments assuming policy account values and guaranteed values are fixed at the valuation date, and reinsurance coverage ends at the earlier of the maturity of the underlying variable annuity policy or the reinsurance treaty. No withdrawals, lapses, and mortality improvements are assumed in the projection. GLB-related risks contain conservative mortality and annuitization assumptions.

Schedule Of Significant Unobservable Inputs Used In Level 3 Liability Valuations

For MRB, Chubb estimates fair value using an internal valuation model which includes 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. All reinsurance treaties contain claim limits, which are also factored into the valuation model.

Valuation Technique

Significant Unobservable Inputs

September 30, 2024

September 30, 2023

Ranges

Weighted Average(1)

Ranges

Weighted Average(1)

MRB (1)

Actuarial model

Lapse rate

0.5% – 27.3%

3.4

%

0.5% – 30%

4.0

%

Annuitization rate

0% – 100%

4.6

%

0% – 100%

4.8

%

(1)The weighted-average lapse and annuitization rates are determined by weighting each treaty's rates by the MRB contract's fair value.

Commitments, contingencies, and guarantees (Tables)

9 Months Ended

Sep. 30, 2024

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 location, fair value in an asset or (liability) position, and notional value/payment provision of our derivative instruments:


				September 30, 2024								December 31, 2023
	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 derivatives not designated as hedging instruments:
Foreign currency forward contracts	OA / (AP)	$	38	$	(125)	$	4,399		$	27		$	(94)	$	3,662
Options/Futures contracts on notes and bonds	OA / (AP)	4		(2)		1,602			27			(42)		2,062
Convertible securities (1)	FM AFS / ES	61		—		65			56			—		64
		$	103	$	(127)	$	6,066		$	110		$	(136)	$	5,788
Other derivative instruments:
Futures contracts on equities (2)	OA / (AP)	$	—	$	(25)	$	967		$	—		$	(37)	$	1,157
Other	OA / (AP)	—		(5)		355			—			(5)		217
		$	—	$	(30)	$	1,322		$	—		$	(42)	$	1,374
Derivatives designated as hedging instruments:
Cross-currency swaps - fair value hedges	OA / (AP)	$	130	$	—	$	1,652		$	126		$	—	$	1,631
Cross-currency swaps - net investment hedges	OA / (AP)	20		(174)		2,969			10			(128)		1,619
		$	150	$	(174)	$	4,621		$	136		$	(128)	$	3,250

(1)Includes fair value of embedded derivatives.

(2)Related to MRB book of business.

Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location


	Three Months Ended				Nine Months Ended
	September 30				September 30
(pre-tax, in millions of U.S. dollars)	2024		2023		2024		2023
Gain (loss) recognized in OCI	$	42	$	(17)	$	(12)	$	23
Net realized gain (loss) reclassified from OCI	63		(51)		14		(20)
Interest expense reclassified from OCI	(3)		(4)		(11)		(12)
OCI gain (loss) after reclassifications	$	(18)	$	38	$	(15)	$	55

Schedule of Net Investment Hedges, Statements of Financial Performance and Financial Position, Location


	Three Months Ended				Nine Months Ended
	September 30				September 30
(pre-tax, in millions of U.S. dollars)	2024		2023		2024		2023
Gain (loss) recognized in OCI	$	(98)	$	(20)	$	(25)	$	(8)
Interest income reclassified from OCI	5		3		11		10
OCI gain (loss) after reclassifications	$	(103)	$	(23)	$	(36)	$	(18)

Net Realized Gains (Losses) Of Derivative Instrument Activity In Consolidated Statement Of Operations

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


	Three Months Ended				Nine Months Ended
	September 30				September 30
(in millions of U.S. dollars)	2024		2023		2024		2023
Investment and embedded derivative instruments:
Foreign currency forward contracts	$	52	$	(17)	$	(28)	$	(95)

All other futures contracts, options, and equities	12		29		30		5
Convertible securities (1)	2		(3)		4		(2)

Total investment and embedded derivative instruments	$	66	$	9	$	6	$	(92)
Other derivative instruments:
Futures contracts on equities (2)	$	(41)	$	52	$	(157)	$	(80)
Other	(2)		(7)		(7)		(6)
Total other derivative instruments	$	(43)	$	45	$	(164)	$	(86)
	$	23	$	54	$	(158)	$	(178)

(1)Includes embedded derivatives.

(2)Related to MRB book of business.

Transfer of Certain Financial Assets Accounted for as Secured Borrowings

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

	September 30, 2024		December 31, 2023
(in millions of U.S. dollars)	Overnight and Continuous
Collateral held under securities lending agreements:
Cash	$	784	$	555
U.S. Treasury / Agency	361		33
Non-U.S.	680		621
Corporate and asset-backed securities	64		57

Municipal	3		6
Equity securities	35		27

	$	1,927	$	1,299
Gross amount of recognized liability for securities lending payable	$	1,927	$	1,299

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
	September 30, 2024								December 31, 2023
	Up to 30 Days		30-90 Days		Greater than 90 Days		Total		Up to 30 Days		30-90 Days		Greater than 90 Days		Total
(in millions of U.S. dollars)
Collateral pledged under repurchase agreements:
Cash	$	—	$	—	$	—	$	—	$	—	$	33	$	1	$	34
Non-U.S.	1,768		—		—		1,768		1,355		—		—		1,355
U.S. Treasury / Agency	—		100		—		100		—		105		—		105


Mortgage-backed securities	469		459		477		1,405		—		913		517		1,430
	$	2,237	$	559	$	477	$	3,273	$	1,355	$	1,051	$	518	$	2,924
Gross amount of recognized liabilities for repurchase agreements							$	3,048							$	2,833
Difference (1)							$	225							$	91

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

Shareholders' Equity (Tables)

9 Months Ended

Sep. 30, 2024

Stockholders' Equity Note [Abstract]

Dividends Declared

The following table presents dividend distributions per Common Share in Swiss francs (CHF) and U.S. dollars (USD):


	Three Months Ended						Nine Months Ended
	September 30						September 30
	2024			2023			2024			2023
	CHF	USD		CHF	USD		CHF	USD		CHF	USD
Total dividend distributions per common share	0.78	$	0.91	0.75	$	0.86	2.35	$	2.68	2.29	$	2.55

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				Nine Months Ended
	September 30				September 30
(in millions of U.S. dollars, except share data)	2024		2023		2024		2023
Number of shares repurchased	1,441,607		2,949,900		4,915,964		8,634,600
Cost of shares repurchased	$	413	$	606	$	1,299	$	1,758
Repurchase authorization remaining at end of period	$	2,400	$	4,398	$	2,400	$	4,398

Schedule of Accumulated Other Comprehensive Income (Loss)

The following table presents changes in accumulated other comprehensive income (loss):


	Three Months Ended				Nine Months Ended
	September 30				September 30
(in millions of U.S. dollars)	2024		2023		2024		2023
Accumulated other comprehensive income (loss) (AOCI)
Net unrealized appreciation (depreciation) on investments
Balance – beginning of period, net of tax	$	(5,301)	$	(6,809)	$	(4,177)	$	(7,279)
Change in period, before reclassification from AOCI (before tax)	3,419		(2,240)		2,139		(1,935)
Amounts reclassified from AOCI (before tax)	40		70		154		357
Change in period, before tax	3,459		(2,170)		2,293		(1,578)
Income tax (expense) benefit	(198)		29		(149)		(93)
Total other comprehensive income (loss)	3,261		(2,141)		2,144		(1,671)
Noncontrolling interests, net of tax	2		3		9		3
Balance – end of period, net of tax	(2,042)		(8,953)		(2,042)		(8,953)
Current discount rate on liability for future policy benefits
Balance – beginning of period, net of tax	66		(247)		51		(75)
Change in period, before tax	(672)		683		(672)		497
Income tax (expense) benefit	36		(35)		14		(21)
Total other comprehensive income (loss)	(636)		648		(658)		476
Noncontrolling interests, net of tax	(43)		(3)		(80)		(3)
Balance – end of period, net of tax	(527)		404		(527)		404
Instrument-specific credit risk on market risk benefits
Balance – beginning of period, net of tax	(13)		(16)		(22)		(24)
Change in period, before tax	(8)		(5)		2		3
Income tax benefit	1		—		—		—
Total other comprehensive income (loss)	(7)		(5)		2		3
Noncontrolling interests, net of tax	—		—		—		—
Balance – end of period, net of tax	(20)		(21)		(20)		(21)


	Three Months Ended				Nine Months Ended
	September 30				September 30
(in millions of U.S. dollars)	2024		2023		2024		2023
Accumulated other comprehensive income (loss) (AOCI) - continued
Cumulative foreign currency translation adjustment
Balance – beginning of period, net of tax	(3,342)		(2,920)		(2,945)		(2,966)
Change in period, before reclassification from AOCI (before tax)	450		(314)		6		(269)
Amounts reclassified from AOCI (before tax)	(5)		(3)		(11)		(10)
Change in period, before tax	445		(317)		(5)		(279)
Income tax benefit	7		13		19		21
Total other comprehensive income (loss)	452		(304)		14		(258)
Noncontrolling interests, net of tax	62		(76)		21		(76)
Balance – end of period, net of tax	(2,952)		(3,148)		(2,952)		(3,148)












Fair value hedging instruments
Balance – beginning of period, net of tax	(11)		(53)		(13)		(66)
Change in period, before reclassification from AOCI (before tax)	42		(17)		(12)		23
Amounts reclassified from AOCI (before tax)	(60)		55		(3)		32
Change in period, before tax	(18)		38		(15)		55
Income tax (expense) benefit	4		(7)		3		(11)
Total other comprehensive income (loss)	(14)		31		(12)		44
Noncontrolling interests, net of tax	—		—		—		—
Balance – end of period, net of tax	(25)		(22)		(25)		(22)
Postretirement benefit liability adjustment
Balance – beginning of period, net of tax	297		223		297		225
Change in period, before tax	(1)		(1)		(2)		(3)
Income tax benefit	—		—		1		—
Total other comprehensive loss	(1)		(1)		(1)		(3)
Noncontrolling interests, net of tax	—		—		—		—
Balance – end of period, net of tax	296		222		296		222
Accumulated other comprehensive loss	$	(5,270)	$	(11,518)	$	(5,270)	$	(11,518)

Reclassification out of Accumulated Other Comprehensive Income

The following table presents reclassifications from accumulated other comprehensive income (loss) to the Consolidated statements of operations:


	Three Months Ended				Nine Months Ended				Consolidated Statement of Operations Location
	September 30				September 30
(in millions of U.S. dollars)	2024		2023		2024		2023
Fixed maturities available-for-sale	$	(40)	$	(70)	$	(154)	$	(357)	Net realized gains (losses)
Income tax benefit	17		25		41		59		Income tax expense
	$	(23)	$	(45)	$	(113)	$	(298)	Net income
Cumulative foreign currency translation adjustment
Cross-currency swaps	$	5	$	3	$	11	$	10	Interest expense
Income tax expense	(1)		(1)		(2)		(2)		Income tax expense
	$	4	$	2	$	9	$	8	Net income
Net gains (losses) of fair value hedging instruments
Cross-currency swaps	$	63	$	(51)	$	14	$	(20)	Net realized gains (losses)
Cross-currency swaps	(3)		(4)		(11)		(12)		Interest expense
Income tax (expense) benefit	(12)		12		—		7		Income tax expense
	$	48	$	(43)	$	3	$	(25)	Net income
Total amounts reclassified from AOCI	$	29	$	(86)	$	(101)	$	(315)

Postretirement benefits (Tables)

9 Months Ended

Sep. 30, 2024

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
	2024				2023				2024		2023
Three Months Ended September 30	U.S. Plans		Non-U.S. Plans		U.S. Plans		Non-U.S. Plans
(in millions of U.S. dollars)
Service cost	$	—	$	2	$	—	$	2	$	—	$	—
Non-service cost (benefit):
Interest cost	33		9		35		9		—		1
Expected return on plan assets	(61)		(13)		(56)		(13)		—		—
Amortization of net actuarial (gain) loss	—		—		—		—		(1)		(1)
Amortization of prior service cost	—		—		—		—		—		(1)

Settlements	1		—		3		—		—		—
Total non-service cost (benefit)	(27)		(4)		(18)		(4)		(1)		(1)
Net periodic benefit cost (benefit)	$	(27)	$	(2)	$	(18)	$	(2)	$	(1)	$	(1)


	Pension Benefit Plans								Other Postretirement Benefit Plans
	2024				2023				2024			2023
Nine Months Ended September 30	U.S. Plans		Non-U.S. Plans		U.S. Plans		Non-U.S. Plans
(in millions of U.S. dollars)
Service cost:	$	—	$	7	$	—	$	6		$	—		$	—
Non-service cost (benefit):
Interest cost	100		27		103		27			1			2
Expected return on plan assets	(183)		(38)		(168)		(38)			(2)			(2)
Amortization of net actuarial (gain) loss	(1)		1		—		—			(2)			(1)
Amortization of prior service cost	—		—		—		—			—			(1)
Settlements	1		—		3		—			—			—
Total non-service cost (benefit)	(83)		(10)		(62)		(11)			(3)			(2)
Net periodic benefit cost (benefit)	$	(83)	$	(3)	$	(62)	$	(5)		$	(3)		$	(2)

The line items in which the service cost and non-service cost (benefit) components of net periodic cost (benefit) are included in the Consolidated statements of operations were as follows:


	Pension Benefit Plans				Other Postretirement Benefit Plans
Three Months Ended September 30	2024		2023		2024		2023
(in millions of U.S. dollars)
Service cost:
Losses and loss expenses	$	—	$	—	$	—	$	—
Administrative expenses	2		2		—		—
Total service cost	2		2		—		—
Non-service cost (benefit):
Losses and loss expenses	(3)		(1)		—		—
Administrative expenses	(28)		(21)		(1)		(1)
Total non-service cost (benefit)	(31)		(22)		(1)		(1)
Net periodic benefit cost (benefit)	$	(29)	$	(20)	$	(1)	$	(1)


	Pension Benefit Plans				Other Postretirement Benefit Plans
Nine Months Ended September 30	2024		2023		2024		2023
(in millions of U.S. dollars)
Service cost:
Losses and loss expenses	$	—	$	—	$	—	$	—
Administrative expenses	7		6		—		—
Total service cost	7		6		—		—
Non-service cost (benefit):
Losses and loss expenses	(9)		(6)		—		—
Administrative expenses	(84)		(67)		(3)		(2)
Total non-service cost (benefit)	(93)		(73)		(3)		(2)
Net periodic benefit cost (benefit)	$	(86)	$	(67)	$	(3)	$	(2)

Other Income and Expense (Tables)

9 Months Ended

Sep. 30, 2024

Other Income and Expenses [Abstract]

Schedule of Other Nonoperating Income (Expense)


	Three Months Ended				Nine Months Ended
	September 30				September 30
(in millions of U.S. dollars)	2024		2023		2024		2023
Equity in net income (loss) of partially-owned entities	$	343	$	150	$	621	$	610
Gains (losses) from fair value changes in separate account assets (1)	(30)		(19)		(9)		(56)
Asset management and performance fee revenue	53		55		163		55
Asset management and performance fee expense	(34)		(33)		(102)		(33)
Federal excise and capital taxes	(7)		(6)		(16)		(17)
Other	—		7		(31)		(9)
Total	$	325	$	154	$	626	$	550

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

Segment information (Tables)

9 Months Ended

Sep. 30, 2024

Segment Reporting [Abstract]

Operations By Segment

The following tables present the Statement of Operations by segment:


For the Three Months Ended September 30, 2024 (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		Segment Measure Reclass		Chubb Consolidated



Net premiums written	$	5,500	$	1,679	$	1,379	$	3,367	$	352	$	1,552	$	—	$	—	$	13,829
Net premiums earned	5,110		1,577		1,419		3,421		316		1,530		—		—		13,373
Losses and loss expenses	3,391		879		1,193		1,631		200		32		58		(1)		7,383
Policy benefits	—		—		—		120		—		989		—		(10)		1,099
Policy acquisition costs	689		315		88		852		89		291		—		—		2,324
Administrative expenses	338		88		2		340		9		213		104		—		1,094
Underwriting income (loss)	692		295		136		478		18		5		(162)		11		1,473
Net investment income	931		112		20		286		64		250		(28)		(127)		1,508
Other (income) expense	6		1		1		5		—		(39)		(202)		(97)		(325)
Amortization expense of purchased intangibles	2		3		5		21		—		10		40		—		81
Segment income (loss)	$	1,615	$	403	$	150	$	738	$	82	$	284	$	(28)	$	(19)	$	3,225
Net realized gains (losses)													179		19		198
Market risk benefits gains (losses)													(230)		—		(230)
Interest expense													192		—		192
Integration expenses													7		—		7
Income tax expense													504		—		504
Net income (loss)													$	(782)	$	—	$	2,490
Net income attributable to noncontrolling interests													166		—		166
Net income (loss) attributable to Chubb													$	(948)	$	—	$	2,324


For the Three Months Ended September 30, 2023 (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		Segment Measure Reclass		Chubb Consolidated



Net premiums written	$	5,132	$	1,527	$	1,521	$	3,211	$	261	$	1,452	$	—	$	—	$	13,104
Net premiums earned	4,735		1,407		1,540		3,311		239		1,442		—		—		12,674
Losses and loss expenses	3,025		900		1,356		1,635		116		20		61		(7)		7,106
Policy benefits	—		—		—		91		—		866		—		(19)		938
Policy acquisition costs	640		287		76		827		69		279		—		—		2,178
Administrative expenses	323		84		3		327		9		216		98		—		1,060
Underwriting income (loss)	747		136		105		431		45		61		(159)		26		1,392
Net investment income	780		94		12		248		47		211		14		(92)		1,314
Other (income) expense	6		2		—		(10)		—		(28)		(51)		(73)		(154)
Amortization expense of purchased intangibles	—		3		6		19		—		12		44		—		84
Segment income (loss)	$	1,521	$	225	$	111	$	670	$	92	$	288	$	(138)	$	7	$	2,776
Net realized gains (losses)													(96)		(7)		(103)
Market risk benefits gains (losses)													(32)		—		(32)
Interest expense													174		—		174
Integration expenses													14		—		14
Income tax expense													413		—		413
Net income (loss)													$	(867)	$	—	$	2,040
Net loss attributable to noncontrolling interests													(3)		—		(3)
Net income (loss) attributable to Chubb													$	(864)	$	—	$	2,043


For the Nine Months Ended September 30, 2024 (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		Segment Measure Reclass		Chubb Consolidated



Net premiums written	$	15,690	$	4,911	$	2,386	$	10,536	$	1,122	$	4,765	$	—	$	—	$	39,410
Net premiums earned	14,890		4,560		2,173		9,966		950		4,709		—		—		37,248
Losses and loss expenses	9,640		2,654		1,785		4,728		492		86		161		(5)		19,541
Policy benefits	—		—		—		312		—		3,090		—		96		3,498
Policy acquisition costs	2,037		914		154		2,517		250		885		—		—		6,757
Administrative expenses	993		262		7		1,019		29		638		310		—		3,258
Underwriting income (loss)	2,220		730		227		1,390		179		10		(471)		(91)		4,194
Net investment income	2,620		322		62		836		179		738		(86)		(304)		4,367
Other (income) expense	28		—		1		14		—		(111)		(263)		(295)		(626)
Amortization expense of purchased intangibles	2		7		18		61		—		31		122		—		241
Segment income (loss)	$	4,810	$	1,045	$	270	$	2,151	$	358	$	828	$	(416)	$	(100)	$	8,946
Net realized gains (losses)													101		100		201
Market risk benefits gains (losses)													(238)		—		(238)
Interest expense													552		—		552
Integration expenses													21		—		21
Income tax expense													1,336		—		1,336
Net income (loss)													$	(2,462)	$	—	$	7,000
Net income attributable to noncontrolling interests													303		—		303
Net income (loss) attributable to Chubb													$	(2,765)	$	—	$	6,697


For the Nine Months Ended September 30, 2023 (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		Segment Measure Reclass		Chubb Consolidated



Net premiums written	$	14,575	$	4,404	$	2,581	$	9,359	$	831	$	4,015	$	—	$	—	$	35,765
Net premiums earned	13,710		4,084		2,334		9,005		720		3,962		—		—		33,815
Losses and loss expenses	8,625		2,634		2,003		4,139		319		87		133		(3)		17,937
Policy benefits	—		—		—		338		—		2,283		—		(56)		2,565
Policy acquisition costs	1,867		836		128		2,286		196		829		—		—		6,142
Administrative expenses	934		247		9		899		27		553		290		—		2,959
Underwriting income (loss)	2,284		367		194		1,343		178		210		(423)		59		4,212
Net investment income	2,204		262		43		636		144		525		28		(276)		3,566
Other (income) expense	18		2		—		(29)		(1)		(69)		(251)		(220)		(550)
Amortization expense of purchased intangibles	—		8		19		52		—		18		129		—		226
Segment income (loss)	$	4,470	$	619	$	218	$	1,956	$	323	$	786	$	(273)	$	3	$	8,102
Net realized gains (losses)													(481)		(3)		(484)
Market risk benefits gains (losses)													(154)		—		(154)
Interest expense													499		—		499
Integration expenses													51		—		51
Income tax expense													1,189		—		1,189
Net income (loss)													$	(2,647)	$	—	$	5,725
Net loss attributable to noncontrolling interests													(3)		—		(3)
Net income (loss) attributable to Chubb													$	(2,644)	$	—	$	5,728

Earnings per share (Tables)

9 Months Ended

Sep. 30, 2024

Earnings Per Share [Abstract]

Schedule Of Earnings Per Share, Basic And Diluted


	Three Months Ended				Nine Months Ended
	September 30				September 30
(in millions of U.S. dollars, except share and per share data)	2024		2023		2024		2023
Numerator:
Net income	$	2,490	$	2,040	$	7,000	$	5,725
Net income (loss) attributable to noncontrolling interests	166		(3)		303		(3)
Net income attributable to Chubb	$	2,324	$	2,043	$	6,697	$	5,728
Denominator:
Denominator for basic earnings per share attributable to Chubb:
Weighted-average shares outstanding	403,831,412		409,505,454		404,700,118		412,076,470
Denominator for diluted earnings per share attributable to Chubb:
Share-based compensation plans	4,047,315		3,100,505		4,191,655		3,288,940
Weighted-average shares outstanding and assumed conversions	407,878,727		412,605,959		408,891,773		415,365,410
Basic earnings per share attributable to Chubb	$	5.75	$	4.99	$	16.55	$	13.90
Diluted earnings per share attributable to Chubb	$	5.70	$	4.95	$	16.38	$	13.79
Potential anti-dilutive share conversions	1,330,590		2,562,206		1,080,371		2,330,821

General and significant accounting policies (Narrative) (Details)	Sep. 30, 2024	Dec. 31, 2023	Jul. 01, 2023
Huatai Group
General and significant accounting policies [Line Items]
Subsidiary, Ownership Percentage, Parent	85.50%	76.50%	69.60%

Acquisitions (Narrative) (Details) - USD ($)
$ in Millions

3 Months Ended

9 Months Ended

May 31, 2024

Sep. 30, 2024

Dec. 31, 2023

Jul. 01, 2023

$ 19,990

^[1]

$ 19,990

^[1]

$ 19,686

$ 6,594

$ 6,775

Subsidiary, Ownership Percentage, Parent

85.50%

76.50%

69.60%

Additional 9.0 percent ownership interest obtained in subsidiary

9.00%

Outstanding 1.6 percent additional ownership interest agreed on

1.60%

Equity Method Investment, Ownership Percentage

64.20%

Equity method investing, additional 1.0 percent agreed on

1.00%

Payments to Acquire Additional Interest in Subsidiaries

$ 236

Deposits previously paid on additional ownership interest obtained

319

Payment on additional ownership interest obtained, including deposits previously paid

$ 555

$ 3,458

$ 1,655

healthy paws

Payments to Acquire Businesses, Gross

$ 300

256

$ 44

[1]	Includes $509 million attributable to noncontrolling interests.

Acquisitions (Schedule of recognized identifiable assets acquired and liabilities assumed) (Details) - USD ($)
$ in Millions

Sep. 30, 2024

Dec. 31, 2023

Sep. 30, 2023

Jul. 01, 2023

Dec. 31, 2022

Accrued investment income

$ 1,165

$ 1,086

Insurance and reinsurance balances receivable

15,709

13,379

Reinsurance recoverable on losses and loss expenses

^[1]

19,606

19,952

Value of business acquired

^[1]

292

280

3,452

3,674

Other assets

8,461

7,508

Total assets

250,557

230,682

Unpaid losses and loss expenses

84,326

80,122

$ 79,705

$ 75,747

Unearned premiums

24,498

22,051

Future policy benefits

16,003

13,888

13,109

Policyholders' account balances

8,136

7,462

7,178

Insurance and reinsurance balances payable

8,696

8,302

Accounts Payable and Accrued Liabilities

8,967

8,332

Deferred tax liabilities

1,652

1,555

Repurchase agreements

3,048

2,833

Total liabilities

180,437

166,991

Stockholders' Equity

65,757

59,507

52,373

Noncontrolling interests

4,363

4,184

Total shareholders' equity

$ 70,120

$ 63,691

$ 57,504

Accrued investment income

Investments and Cash

$ 13,346

60

Insurance and reinsurance balances receivable

277

Reinsurance recoverable on losses and loss expenses

581

Value of business acquired

27

309

Goodwill and intangible assets

5,113

Other assets

748

Total assets

20,461

Unpaid losses and loss expenses

831

Unearned premiums

800

Future policy benefits

2,351

Policyholders' account balances

4,014

Insurance and reinsurance balances payable

644

Accounts Payable and Accrued Liabilities

682

Deferred tax liabilities

232

Repurchase agreements

1,269

Total liabilities

10,823

Stockholders' Equity

4,428

Noncontrolling interests

5,210

Total shareholders' equity

$ 9,638

[1]	Net of valuation allowance for uncollectible reinsurance.

Acquisitions (Acquisition operations) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Business Acquisition [Line Items]
Total revenues	$ 14,849	$ 13,853	$ 41,578	$ 36,743
Net income	2,490	2,040	7,000	5,725
Net loss attributable to Chubb	$ 2,324	$ 2,043	$ 6,697	5,728
Huatai Group
Business Acquisition [Line Items]
Total revenues				389
Net income				(11)
Net loss attributable to Chubb				$ (9)

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-9

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 60
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (g)
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-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481687/323-10-50-3

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 28
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-28

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(i))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A

Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(ii))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(iii)(A))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(iv))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(5))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(i))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iii)(A))
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-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Name Accounting Standards Codification
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 30
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-30

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-42

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 40
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-40

Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 25: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-05(b)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477314/942-235-S99-1

Reference 26: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

Restricted assets in fixed maturities and short-term investments

Acquisitions (Pro forma) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Acquisitions (Pro forma) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Business Acquisition [Line Items]
Net premiums earned	$ 13,373	$ 12,674	$ 37,248	$ 33,815
Huatai Group \| Pro Forma
Business Acquisition [Line Items]
Net premiums earned		12,674		34,605
Total revenues		13,755		37,589
Net income		1,905		5,595
Net income attributable to Chubb		$ 1,912		$ 5,587

Investments (Narrative) (Details) - USD ($)
$ in Millions

3 Months Ended

9 Months Ended

Sep. 30, 2024

Sep. 30, 2023

Sep. 30, 2024

Sep. 30, 2023

^[1]

Dec. 31, 2023

Investments [Line Items]

$ 19,536

$ 18,242

Restricted assets in cash

153

172

Variable Interest Entity, Nonconsolidated, Comparison of Carrying Amount of Assets and Liabilities to Maximum Loss Exposure

110

$ 153

(1)

$ 92

^[1]

(8)

$ 79

Investments [Line Items]

Deferred Tax Assets, Valuation Allowance

$ 116

Investments

Investments [Line Items]

$ 157

[1]	The three and nine months ended September 30, 2023 includes a one-time realized gain of $116 million as a result of the consolidation of Huatai Group.

Investments (Schedule Of Amortized Cost and Fair Value of Available-for-Sale Securities) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	$ 119,441		$ 111,128
Debt Securities, Available-for-sale, Allowance for Credit Loss	(75)	$ (122)	(156)	$ (158)	$ (193)	$ (169)
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	2,008		1,148
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before tax	(4,109)		(5,549)
Available for sale, Fair Value	117,265		106,571
U.S. Treasury / Agency
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	2,709		3,721
Debt Securities, Available-for-sale, Allowance for Credit Loss	0		0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	18		13
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before tax	(98)		(144)
Available for sale, Fair Value	2,629		3,590
Non-U.S.
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	37,560		35,918
Debt Securities, Available-for-sale, Allowance for Credit Loss	(23)		(49)
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	895		592
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before tax	(931)		(1,297)
Available for sale, Fair Value	37,501		35,164
Corporate and asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	47,588		44,695
Debt Securities, Available-for-sale, Allowance for Credit Loss	(52)		(104)
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	736		390
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before tax	(1,579)		(2,151)
Available for sale, Fair Value	46,693		42,830
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	29,517		23,720
Debt Securities, Available-for-sale, Allowance for Credit Loss	0		(3)
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	341		143
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before tax	(1,384)		(1,802)
Available for sale, Fair Value	28,474		22,058
Municipal
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	2,067		3,074
Debt Securities, Available-for-sale, Allowance for Credit Loss	0		0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	18		10
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before tax	(117)		(155)
Available for sale, Fair Value	$ 1,968		$ 2,929

Investments (Schedule Of Fixed Maturities By Contractual Maturity) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Available for sale, Due in 1 year or less, Fair Value & Net Carrying Value	$ 4,536	$ 4,729
Available for sale, Due after 1 year through 5 years, Fair Value & Net Carrying Value	35,739	33,573
Available for sale, Due after 5 years through 10 years, Fair Value & Net Carrying Value	28,913	28,480
Available for sale, Due after 10 years, Fair Value & Net Carrying Value	19,603	17,731
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value	88,791	84,513
Available for sale, Mortgage backed securities, Fair Value & Net Carrying Value	28,474	22,058
Available for sale, Fair Value	$ 117,265	$ 106,571

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 103
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-103

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 100
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-100

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (aa)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481830/320-10-45-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(6))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479130/326-30-45-1

Investments (Aggregate Fair Value And Gross Unrealized Loss By Length Of Time Security Has Continuously Been In Unrealized Loss Position) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 3,916	$ 8,569
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(45)	(176)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	45,457	53,950
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(3,271)	(4,129)
Debt Securities, Available-for-sale, Unrealized Loss Position	49,373	62,519
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(3,316)	(4,305)
U.S. Treasury / Agency
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	0	463
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	(9)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,677	2,504
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(98)	(135)
Debt Securities, Available-for-sale, Unrealized Loss Position	1,677	2,967
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(98)	(144)
Non-U.S.
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	1,706	2,464
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(26)	(43)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	13,628	15,971
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(734)	(957)
Debt Securities, Available-for-sale, Unrealized Loss Position	15,334	18,435
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(760)	(1,000)
Corporate and asset-backed securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	1,511	2,866
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(13)	(51)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	15,280	20,334
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(959)	(1,194)
Debt Securities, Available-for-sale, Unrealized Loss Position	16,791	23,200
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(972)	(1,245)
Mortgage-backed securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	664	1,659
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(5)	(58)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	13,684	13,831
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(1,366)	(1,706)
Debt Securities, Available-for-sale, Unrealized Loss Position	14,348	15,490
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(1,371)	(1,764)
Municipal
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	35	1,117
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(1)	(15)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,188	1,310
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(114)	(137)
Debt Securities, Available-for-sale, Unrealized Loss Position	1,223	2,427
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ (115)	$ (152)

Investments (Rollforward of expected credit-losses, AFS) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Beginning Balance	$ 122	$ 193	$ 156	$ 169
Debt Securities, Available-for-sale, Allowance for Credit Loss, Period Increase (Decrease)	23	34	95	172
Debt Securities, Available-for-sale, Allowance for Credit Loss, Writeoff	(1)	(1)	(6)	(5)
Debt Securities, Available-for-sale, Allowance for Credit Loss, Recovery	(69)	(68)	(170)	(178)
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Ending Balance	$ 75	$ 158	$ 75	$ 158

Investments (Rollforward of expected credit losses HTM) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Beginning Balance	$ 0	$ 0	$ 0	$ 34
Debt Securities, Held-to-maturity, Allowance for Credit Loss, Recovery	0	0	0	(34)
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Ending Balance	$ 0	$ 0	$ 0	$ 0

Investments (Rollforward of expected credit losses Private Debt HFI) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Private Debt, Held-for-investment, Allowance for Credit Loss [Line Items]
Valuation allowance for expected credit losses - beginning of period	$ 5	$ 0	$ 4	$ 0
Provision for expected credit loss	0	0	2	0
Recovery of expected credit loss	0	0	1	0
Valuation allowance for expected credit losses - end of period	$ 5	$ 0	$ 5	$ 0

Investments (Net Realized Gains (Losses) And Losses Included In Net Realized Gains (Losses) And Other Comprehensive Income) (Detail) - USD ($)
$ in Millions

3 Months Ended

9 Months Ended

Sep. 30, 2024

Sep. 30, 2023

Sep. 30, 2024

Sep. 30, 2023

Debt Securities, Available-for-Sale, Allowance for Credit Loss, Period Increase (Decrease)

$ 198

$ (103)

$ 201

$ (484)

23

34

95

172

Debt Securities, Available-for-sale, Gain (Loss), Total

111

(70)

186

(357)

Foreign exchange

(58)

(67)

(162)

(122)

23

54

(158)

(178)

Fixed Maturities [Member]

(1)

92

^[1]

(8)

79

^[1]

Debt Securities, Available-for-Sale, Realized Gain (Loss), Excluding Other-than-temporary Impairment

21

97

73

116

Debt Securities, Available-for-Sale, Realized Loss, Excluding Other-than-temporary Impairment

(91)

(184)

(338)

(456)

Debt Securities, Available-for-Sale, Allowance for Credit Loss, Period Increase (Decrease)

48

34

80

44

Debt Securities, Available-For-Sale, Credit Impairment Charges Intent to Sell

^[2]

(19)

(16)

(81)

(60)

Equity Securities

Equity Securities, FV-NI, Realized Gain (Loss)

123

(100)

147

(61)

Less: Net gains (losses) recognized from sales of securities

(6)

(45)

5

(48)

129

(55)

142

(13)

Other Investments

Less: Net gains (losses) recognized from sales of securities

152

(1)

452

(1)

2

0

2

0

150

(1)

450

(1)

Private Equities

Less: Net gains (losses) recognized from sales of securities

(41)

40

39

75

0

Equity securities and other investments

(41)

40

39

75

Less: Net gains (losses) recognized from sales of securities

234

(61)

638

13

(4)

(45)

7

(48)

Other derivative instruments

238

(16)

631

61

Investment and embedded derivative instruments

(2)

(7)

(6)

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

$ 66

$ 9

$ 6

$ (92)

[1]	The three and nine months ended September 30, 2023 includes a one-time realized gain of $116 million as a result of the consolidation of Huatai Group.
[2]	Relates to certain securities we intended to sell and securities written to market entering default.

Investments Schedule of Gains and Losses on Equity and Other Investments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Gain (Loss) on Securities [Line Items]
Net realized gains (losses)	$ 198	$ (103)	$ 201	$ (484)
Equity Securities
Gain (Loss) on Securities [Line Items]
Equity Securities, FV-NI, Realized Gain (Loss)	123	(100)	147	(61)
Less: Net gains (losses) recognized from sales of securities	(6)	(45)	5	(48)
Unrealized Gain (Loss) on Investments	129	(55)	142	(13)
Other Investments
Gain (Loss) on Securities [Line Items]
Net realized gains (losses)	152	(1)	452	(1)
Less: Net gains (losses) recognized from sales of securities	2	0	2	0
Unrealized Gain (Loss) on Investments	150	(1)	450	(1)
Private Equities
Gain (Loss) on Securities [Line Items]
Net realized gains (losses)	(41)	40	39	75
Less: Net gains (losses) recognized from sales of securities	0	0	0	0
Unrealized Gain (Loss) on Investments	(41)	40	39	75
Equity securities and other investments
Gain (Loss) on Securities [Line Items]
Net realized gains (losses)	234	(61)	638	13
Less: Net gains (losses) recognized from sales of securities	(4)	(45)	7	(48)
Unrealized Gain (Loss) on Investments	$ 238	$ (16)	$ 631	$ 61

Investments Entities that Calculate Net Asset Value Per Share (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Private equities	$ 14,405	$ 14,078
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	6,781	6,210
Financial [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Private equities	1,247	1,241
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	316	364
Real Estate Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Private equities	2,006	2,137
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	588	445
Distressed Alternative Investments [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Private equities	1,257	1,206
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	822	936
Private Credit Alternative Investments [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Private equities	316	331
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	288	298
Private Equity Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Private equities	9,307	8,873
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	4,767	4,167
Vintage Alternative Investments [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Private equities	59	72
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	0	0
Investment Funds Alternative Investments [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Private equities	213	218
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	$ 0	$ 0
Minimum \| Financial [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
Minimum \| Real Estate Funds [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
Minimum \| Distressed Alternative Investments [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
Minimum \| Private Credit Alternative Investments [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
Minimum \| Private Equity Funds [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
Minimum \| Vintage Alternative Investments [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
Maximum \| Financial [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	10 years
Maximum \| Real Estate Funds [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	13 years
Maximum \| Distressed Alternative Investments [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
Maximum \| Private Credit Alternative Investments [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
Maximum \| Private Equity Funds [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
Maximum \| Vintage Alternative Investments [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

Investments (Schedule Of Components Of Restricted Assets) (Detail) - Asset Pledged as Collateral without Right - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Investments [Line Items]
Trust funds	$ 9,137	$ 8,482
Assets pledged under repurchase agreements	3,273	2,924
Deposits with U.S. regulatory authorities	2,565	2,544
Deposits with non-U.S. regulatory authorities and other	4,714	4,464
Total restricted assets	$ 19,689	$ 18,414

Fair value measurements (Financial Instruments Measured At Fair Value On Recurring Basis) (Details) - USD ($)
$ in Millions

Sep. 30, 2024

Dec. 31, 2023

Sep. 30, 2023

$ 117,265

$ 106,571

4,404

3,455

4,375

4,551

8,155

5,527

1,927

1,299

5,996

5,573

$ 5,306

Investment Funds Limited Partnerships Partially Owned Investment Companies Fair Value

748

771

Private equities

14,405

14,078

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

Private equities

14,405

14,078

Policy Loans

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

1,115

702

U.S. Treasury / Agency

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

2,629

3,590

Non-U.S.

Corporate and asset-backed securities

37,501

35,164

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

Mortgage-backed securities

46,693

42,830

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

28,474

22,058

Municipal

Level 1 | Fair Value, Recurring

1,968

2,929

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

1,979

2,911

4,286

3,368

2,491

1,915

616

^[1]

589

^[2]

0

42

54

0

5,919

5,482

15,333

^[1],[3]

14,319

^[2],[4]

127

136

0

25

37

0

^[5]

0

^[6]

Level 1 | U.S. Treasury / Agency | Fair Value, Recurring

152

173

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

Level 1 | Non-U.S. | Fair Value, Recurring

1,979

2,911

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

Level 1 | Corporate and asset-backed securities | Fair Value, Recurring

0

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

Level 1 | Mortgage-backed securities | Fair Value, Recurring

0

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

Level 1 | Municipal | Fair Value, Recurring

0

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

Level 2 | Fair Value, Recurring

0

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

111,823

100,339

0

1,869

2,633

6,424

^[1]

4,236

^[2]

1,927

1,299

0

150

136

77

91

122,270

^[1],[3]

108,734

^[2],[4]

0

174

128

5

0

^[5]

0

^[6]

Level 2 | U.S. Treasury / Agency | Fair Value, Recurring

179

133

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

Level 2 | Non-U.S. | Fair Value, Recurring

650

679

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

Level 2 | Corporate and asset-backed securities | Fair Value, Recurring

36,862

34,472

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

Level 2 | Mortgage-backed securities | Fair Value, Recurring

43,915

40,208

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

Level 2 | Municipal | Fair Value, Recurring

28,428

22,051

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

Level 3 | Fair Value, Recurring

1,968

2,929

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

3,463

3,321

118

87

15

3

0

^[1]

0

^[2]

0

0

0

0

3,596

^[1],[3]

3,411

^[2],[4]

0

0

0

748

^[5]

771

^[6]

Level 3 | U.S. Treasury / Agency | Fair Value, Recurring

748

771

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

Level 3 | Non-U.S. | Fair Value, Recurring

0

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

Level 3 | Corporate and asset-backed securities | Fair Value, Recurring

639

692

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

Level 3 | Mortgage-backed securities | Fair Value, Recurring

2,778

2,622

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

Level 3 | Municipal | Fair Value, Recurring

46

7

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

Total Level 1, Level 2, and Level 3 | Fair Value, Recurring

0

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

117,265

106,571

4,404

3,455

4,375

4,551

7,040

^[1]

4,825

^[2]

1,927

1,299

42

54

150

136

5,996

5,573

141,199

^[1],[3]

126,464

^[2],[4]

127

136

174

128

30

42

748

^[5]

771

^[6]

Total Level 1, Level 2, and Level 3 | U.S. Treasury / Agency | Fair Value, Recurring

1,079

1,077

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

Total Level 1, Level 2, and Level 3 | Non-U.S. | Fair Value, Recurring

2,629

3,590

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

Total Level 1, Level 2, and Level 3 | Corporate and asset-backed securities | Fair Value, Recurring

37,501

35,164

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

Total Level 1, Level 2, and Level 3 | Mortgage-backed securities | Fair Value, Recurring

46,693

42,830

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

Total Level 1, Level 2, and Level 3 | Municipal | Fair Value, Recurring

28,474

22,058

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

Reinsurance recoverable on unpaid losses and loss expenses

$ 1,968

$ 2,929

[1]	Excluded from the table above are other investments of $1,115 million, principally policy loans, measured using NAV as a practical expedient.
[2]	Excluded from the table above are other investments of $702 million, principally policy loans, measured using NAV as a practical expedient.
[3]	Excluded from the table above are private equities of $14,405 million, measured using NAV as a practical expedient.
[4]	Excluded from the table above are private equities of $14,078 million, measured using NAV as a practical expedient.
[5]	Refer to Note 11 for additional information on Market risk benefits.
[6]	Refer to Note 11 for additional information on Market risk benefits.

Fair value measurements (Assets, Measured At Fair Value Using Significant Unobservable Inputs) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other comprehensive income (loss), before income tax	Other comprehensive income (loss), before income tax	Other comprehensive income (loss), before income tax	Other comprehensive income (loss), before income tax
Fair Value, Asset (Liability), Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Total revenues	Total revenues	Total revenues	Total revenues
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Total revenues	Total revenues	Total revenues	Total revenues
Level 3 \| Equity Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance- Beginning of Period, Assets	$ 100	$ 86	$ 87	$ 90
Transfers Into Level 3, Asset			0	0
Transfers out of Level 3, Assets	0	0	0	0
Change in Net Unrealized Gains (Losses) included in OCI, Assets	0	0	0	0
Net Realized Gains/ (Losses), Assets	7	0	6	(6)
Purchases, Assets	17	4	36	15
Sales, Assets	(6)	(5)	(11)	(14)
Settlements, Assets	0	0	0	0
Balance-End of Period, Assets	118	85	118	85
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date, Assets	6	0	5	(6)
Change in Net Unrealized Gains/Losses included in OCI at the Balance Sheet Date, Assets	0	0	0	0
Level 3 \| Short-term Investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance- Beginning of Period, Assets	12	3	3	3
Transfers Into Level 3, Asset			0	0
Transfers out of Level 3, Assets	0	0	0	0
Change in Net Unrealized Gains (Losses) included in OCI, Assets	(1)	0	(2)	(1)
Net Realized Gains/ (Losses), Assets	0	0	0	0
Purchases, Assets	6	0	22	3
Sales, Assets	(1)	(1)	(1)	(3)
Settlements, Assets	(1)	0	(7)	0
Balance-End of Period, Assets	15	2	15	2
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date, Assets	0	0	0	0
Change in Net Unrealized Gains/Losses included in OCI at the Balance Sheet Date, Assets	(1)	0	(2)	0
Level 3 \| Available-for-Sale Debt Securities \| Non-U.S.
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance- Beginning of Period, Assets	632	649	692	564
Transfers Into Level 3, Asset			1	21
Transfers out of Level 3, Assets	(1)	(22)	(7)	(22)
Change in Net Unrealized Gains (Losses) included in OCI, Assets	10	(6)	18	5
Net Realized Gains/ (Losses), Assets	(1)	(2)	(5)	(3)
Purchases, Assets	59	46	214	151
Sales, Assets	(18)	(17)	(69)	(52)
Settlements, Assets	(42)	(15)	(205)	(31)
Balance-End of Period, Assets	639	633	639	633
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date, Assets	0	(1)	(1)	(1)
Change in Net Unrealized Gains/Losses included in OCI at the Balance Sheet Date, Assets	11	(8)	14	1
Level 3 \| Available-for-Sale Debt Securities \| Corporate and asset-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance- Beginning of Period, Assets	2,709	2,524	2,622	2,449
Transfers Into Level 3, Asset			5	3
Transfers out of Level 3, Assets	0	(10)	(3)	(23)
Change in Net Unrealized Gains (Losses) included in OCI, Assets	16	6	26	8
Net Realized Gains/ (Losses), Assets	(10)	(4)	(15)	(7)
Purchases, Assets	316	158	785	481
Sales, Assets	(69)	(40)	(176)	(70)
Settlements, Assets	(184)	(65)	(466)	(272)
Balance-End of Period, Assets	2,778	2,569	2,778	2,569
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date, Assets	(8)	(4)	(10)	(6)
Change in Net Unrealized Gains/Losses included in OCI at the Balance Sheet Date, Assets	12	4	17	2
Level 3 \| Available-for-Sale Debt Securities \| Mortgage-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance- Beginning of Period, Assets	20	10	7	11
Transfers Into Level 3, Asset			0	0
Transfers out of Level 3, Assets	(14)	0	(14)	0
Change in Net Unrealized Gains (Losses) included in OCI, Assets	0	0	0	0
Net Realized Gains/ (Losses), Assets	0	0	0	0
Purchases, Assets	40	16	55	16
Sales, Assets	0	0	0	0
Settlements, Assets	0	(1)	(2)	(2)
Balance-End of Period, Assets	46	25	46	25
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date, Assets	0	0	0	0
Change in Net Unrealized Gains/Losses included in OCI at the Balance Sheet Date, Assets	$ 0	$ 0	$ 0	$ 0

Fair value measurements (Carrying Values And Fair Values Of Financial Instruments Not Measured At Fair Value) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Private debt held-for-investment	$ 2,619	$ 2,553
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Repurchase agreements	3,048	2,833
Short-term debt	1,571	1,460
Long-term debt	14,560	13,035
Total liabilities	180,437	166,991
Portion at Other than Fair Value Measurement \| Level 1
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Private debt held-for-investment	0	0
Total assets	0	0
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
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust	0	0
Liabilities, Fair Value Disclosure	0	0
Portion at Other than Fair Value Measurement \| Level 2
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Private debt held-for-investment	0	0
Total assets	0	0
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Repurchase agreements	3,048	2,833
Short-Term Debt, Fair Value	1,560	1,431
Long-term Debt, Fair Value	13,645	11,924
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust	377	365
Liabilities, Fair Value Disclosure	18,630	16,553
Portion at Other than Fair Value Measurement \| Level 3
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Private debt held-for-investment	2,650	2,560
Total assets	2,650	2,560
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
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust	0	0
Liabilities, Fair Value Disclosure	0	0
Portion at Other than Fair Value Measurement \| Total Level 1, Level 2, and Level 3
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Private debt held-for-investment	2,650	2,560
Total assets	2,650	2,560
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Repurchase agreements	3,048	2,833
Short-Term Debt, Fair Value	1,560	1,431
Long-term Debt, Fair Value	13,645	11,924
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust	377	365
Liabilities, Fair Value Disclosure	18,630	16,553
Reported Value Measurement [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Private debt held-for-investment	2,619	2,553
Total assets	2,619	2,553
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Repurchase agreements	3,048	2,833
Short-term debt	1,571	1,460
Long-term debt	14,560	13,035
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust	309	308
Liabilities, Fair Value Disclosure	$ 19,488	$ 17,636

Reinsurance (Reinsurance Recoverable on Ceded Reinsurance) (Details) - USD ($)
$ in Millions

Sep. 30, 2024

Dec. 31, 2023

Sep. 30, 2023

Dec. 31, 2022

Reinsurance Disclosures [Abstract]

^[1]

$ 17,631

$ 17,884

$ 17,808

$ 17,086

Reinsurance recoverable on paid losses and loss expenses

^[1]

1,975

2,068

Reinsurance recoverable on losses and loss expenses

^[1]

19,606

19,952

Reinsurance Recoverables on Unpaid Losses, Allowance

307

285

Reinsurance Recoverables on Paid Losses, Allowance

81

82

Reinsurance Recoverable, Allowance for Credit Loss, Total

388

367

$ 370

$ 351

Reinsurance Recoverables on Future Policy Benefits, Allowance

^[1]

292

280

$ 0

[1]	Net of valuation allowance for uncollectible reinsurance.

Amount, after valuation allowance, recoverable under reinsurance contracts for losses reported to the ceding insurer but not yet paid and amounts expected for incurred losses and settlement expenses, which have not yet been reported to the ceding insurer.

+ References + Details

Reinsurance, Allowance (Details) - USD ($) $ in Millions	9 Months Ended
Reinsurance, Allowance (Details) - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023
Reinsurance Disclosures [Abstract]
Valuation allowance for uncollectible reinsurance - beginning of period	$ 367	$ 351
Provision for uncollectible reinsurance	24	27
Write-offs charged against the valuation allowance	(4)	(8)
Foreign exchange revaluation	1	0
Valuation allowance for uncollectible reinsurance - end of period	$ 388	$ 370

Deferred acquisition costs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Deferred Policy Acquisition Cost [Line Items]
Deferred Policy Acquisition Cost	$ 8,249	$ 6,856	$ 8,249	$ 6,856
Balance – beginning of period			7,152
Amortization expense	(2,324)	(2,178)	(6,757)	(6,142)
Balance – end of period	8,249	6,856	8,249	6,856
Segment Life [Member]
Deferred Policy Acquisition Cost [Line Items]
Amortization expense	(291)	(279)	(885)	(829)
Overseas General Insurance [Member]
Deferred Policy Acquisition Cost [Line Items]
Amortization expense	(852)	(827)	(2,517)	(2,286)
Short-Duration Insurance, Other
Deferred Policy Acquisition Cost [Line Items]
Deferred Policy Acquisition Cost	3,735	3,283	3,735	3,283
Balance – end of period	3,735	3,283	3,735	3,283
Long-Duration Insurance, Other
Deferred Policy Acquisition Cost [Line Items]
Deferred Policy Acquisition Cost	4,514	3,573	4,514	3,573
Balance – end of period	4,514	3,573	4,514	3,573
Long-Duration Insurance, Other \| Segment Life [Member]
Deferred Policy Acquisition Cost [Line Items]
Deferred Policy Acquisition Cost	3,899	2,952	3,899	2,952
Balance – beginning of period			3,185	2,514
Capitalizations			1,054	742
Amortization expense			(328)	(266)
Other (including foreign exchange)			(12)	(38)
Balance – end of period	3,899	2,952	3,899	2,952
Long-Duration Insurance, Other \| Overseas General Insurance [Member]
Deferred Policy Acquisition Cost [Line Items]
Deferred Policy Acquisition Cost	615	621	615	621
Balance – end of period	615	621	615	621
Term Life Insurance \| Segment Life [Member]
Deferred Policy Acquisition Cost [Line Items]
Deferred Policy Acquisition Cost	461	377	461	377
Balance – beginning of period			402	324
Capitalizations			149	131
Amortization expense			(89)	(76)
Other (including foreign exchange)			(1)	(2)
Balance – end of period	461	377	461	377
Universal Life \| Segment Life [Member]
Deferred Policy Acquisition Cost [Line Items]
Deferred Policy Acquisition Cost	721	651	721	651
Balance – beginning of period			674	639
Capitalizations			109	85
Amortization expense			(60)	(55)
Other (including foreign exchange)			(2)	(18)
Balance – end of period	721	651	721	651
Whole Life Insurance \| Segment Life [Member]
Deferred Policy Acquisition Cost [Line Items]
Deferred Policy Acquisition Cost	785	480	785	480
Balance – beginning of period			534	392
Capitalizations			276	103
Amortization expense			(27)	(18)
Other (including foreign exchange)			2	3
Balance – end of period	785	480	785	480
Accident and Health Insurance Product Line [Member] \| Segment Life [Member]
Deferred Policy Acquisition Cost [Line Items]
Deferred Policy Acquisition Cost	1,628	1,170	1,628	1,170
Balance – beginning of period			1,301	891
Capitalizations			467	396
Amortization expense			(132)	(98)
Other (including foreign exchange)			(8)	(19)
Balance – end of period	1,628	1,170	1,628	1,170
Insurance, Other \| Segment Life [Member]
Deferred Policy Acquisition Cost [Line Items]
Deferred Policy Acquisition Cost	304	274	304	274
Balance – beginning of period			274	268
Capitalizations			53	27
Amortization expense			(20)	(19)
Other (including foreign exchange)			(3)	(2)
Balance – end of period	$ 304	$ 274	$ 304	$ 274

Goodwill (Details)
$ in Millions

9 Months Ended

Sep. 30, 2024

USD ($)

$ 19,686

65

(17)

goodwill attributable to noncontrolling interests

19,990

^[1]

509

North America Commercial P&C Insurance [Member]

6,946

0

(2)

North American Personal P&C Insurance [Member]

7,200

^[1]

2,231

0

(1)

North America Agricultural Insurance [Member]

2,230

^[1]

134

0

0

Overseas General Insurance [Member]

134

^[1]

5,262

0

(43)

Global Reinsurance [Member]

5,219

^[1]

371

0

0

371

^[1]

Segment Life [Member]

4,742

65

29

4,836

^[1]

healthy paws

healthy paws | North America Commercial P&C Insurance [Member]

256

healthy paws | North American Personal P&C Insurance [Member]

256

healthy paws | North America Agricultural Insurance [Member]

0

healthy paws | Overseas General Insurance [Member]

0

healthy paws | Global Reinsurance [Member]

0

healthy paws | Segment Life [Member]

0

Liability for Claims and Claims Adjustment Expense [Line Items]

$ 0

[1]	Includes $509 million attributable to noncontrolling interests.

Unpaid losses and loss expenses (RF) (Details) - USD ($)
$ in Millions

9 Months Ended

Sep. 30, 2024

Sep. 30, 2023

Gross unpaid losses and loss expenses – beginning of period

$ 80,122

$ 75,747

Reinsurance recoverable on unpaid losses and loss expenses – beginning of period (1)

^[1]

(17,884)

(17,086)

Net unpaid losses and loss expenses – beginning of period

62,238

58,661

Current Year Claims and Claims Adjustment Expense

20,302

18,604

Prior Year Claims and Claims Adjustment Expense

^[2]

(761)

(667)

Total, Incurred

19,541

17,937

Net loss and loss expenses paid, Current Year

5,005

4,853

Net loss and loss expenses paid, Prior Years

10,074

10,158

Total, Paid

15,079

15,011

Foreign currency revaluation and other

(5)

(95)

Net unpaid losses and loss expenses – end of period

66,695

61,897

Reinsurance recoverable on unpaid losses and loss expenses (1)

^[1]

17,631

17,808

Gross unpaid losses and loss expenses – end of period

84,326

79,705

prior period development, net adjustments

118

71

Liability for Claims and Claims Adjustment Expense [Line Items]

Net unpaid losses and loss expenses – end of period

$ 0

$ 405

[1]	Net of valuation allowance for uncollectible reinsurance.
[2]	Relates to prior period loss reserve development only and excludes prior period development related to reinstatement premiums, expense adjustments, earned premiums, and A&H long-duration lines totaling $118 million and $71 million for the nine months ended September 30, 2024 and 2023, respectively.

Unpaid losses and loss expenses Unpaid losses and loss expenses (PPD table) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	$ (244)	$ (200)	$ (643)	$ (596)
North America Commercial P&C Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(39)	(84)	(231)	(302)
North America Personal P&C Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(189)	(119)	(305)	(135)
North American Agriculture Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(6)	(9)	(34)	(12)
Overseas General Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(60)	(49)	(210)	(253)
Global Reinsurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(5)	0	(20)	(25)
Corporate Segment [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	55	61	157	131
Short Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(358)	(316)	(853)	(659)
Short Tail [Member] \| North America Commercial P&C Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(164)	(191)	(310)	(279)
Short Tail [Member] \| North America Personal P&C Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(189)	(119)	(305)	(135)
Short Tail [Member] \| North American Agriculture Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(6)	(9)	(34)	(12)
Short Tail [Member] \| Overseas General Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	1	3	(184)	(201)
Short Tail [Member] \| Global Reinsurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	0	0	(20)	(32)
Short Tail [Member] \| Corporate Segment [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	0	0	0	0
Long Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	114	116	210	63
Long Tail [Member] \| North America Commercial P&C Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	125	107	79	(23)
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	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	0	0
Long Tail [Member] \| Overseas General Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(61)	(52)	(26)	(52)
Long Tail [Member] \| Global Reinsurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(5)	0	0	7
Long Tail [Member] \| Corporate Segment [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	$ 55	$ 61	$ 157	$ 131

Unpaid losses and loss expenses Unpaid losses and loss expenses (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Liability for Claims and Claims Adjustment Expense [Line Items]
Liability for Unpaid Claims and Claims Adjustment Expense, Period Increase (Decrease)			$ 4,457
Net Prior Period Development	$ (244)	$ (200)	(643)	$ (596)
Long Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	114	116	210	63
Short Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(358)	(316)	(853)	(659)
North America Commercial P&C Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(39)	(84)	(231)	(302)
North America Commercial P&C Insurance [Member] \| Long Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	125	107	79	(23)
North America Commercial P&C Insurance [Member] \| Short Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(164)	(191)	(310)	(279)
Overseas General Insurance [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(60)	(49)	(210)	(253)
Overseas General Insurance [Member] \| Long Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	(61)	(52)	(26)	(52)
Overseas General Insurance [Member] \| Short Tail [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Net Prior Period Development	$ 1	$ 3	$ (184)	$ (201)

Future policy benefits (Rollforward) (Details) - USD ($)
$ in Millions

9 Months Ended

Sep. 30, 2024

Sep. 30, 2023

Dec. 31, 2023

Dec. 31, 2022

Liability for Future Policy Benefit, Activity [Line Items]

$ 1,850

4,072

Net liability for future policy benefits, before reinsurance recoverable

$ 1,622

1,123

16,003

13,109

$ 13,888

Less: Reinsurance recoverable on future policy benefits

^[1]

292

280

Segment Life [Member]

Liability for Future Policy Benefit, Activity [Line Items]

16,036

14,867

16,693

$ 15,529

Effect of actual variances from expected experience

410

(735)

(112)

(109)

16,991

14,685

2,873

1,344

563

529

^[2]

(2,167)

(1,516)

(140)

(587)

18,120

16,305

(56)

(628)

18,064

15,677

27,462

23,324

28,303

24,456

Effect of actual variances from expected experience

387

(770)

(93)

(95)

28,597

23,591

2,873

1,344

829

750

(1,633)

(1,405)

(65)

(651)

30,601

27,701

455

(1,224)

31,056

26,477

12,992

10,800

Net liability for future policy benefits, before reinsurance recoverable

1,622

1,123

14,614

11,923

Less: Reinsurance recoverable on future policy benefits

266

282

Net liability for future policy benefits, after reinsurance recoverable

$ 14,348

$ 11,641

Liability for Future Policy Benefit, Activity [Line Items]

21 years 1 month 6 days

19 years 7 months 6 days

Other Segments

Net liability for future policy benefits, before reinsurance recoverable

$ 1,389

$ 1,186

Term Life Insurance | Segment Life [Member]

Liability for Future Policy Benefit, Activity [Line Items]

1,590

1,806

1,992

1,867

Effect of actual variances from expected experience

(140)

36

6

(15)

1,858

1,888

3

161

90

45

^[2]

(183)

(127)

(10)

78

1,871

1,977

(287)

(69)

1,584

1,908

2,254

2,321

2,749

2,447

Effect of actual variances from expected experience

(137)

32

13

(12)

2,625

2,467

17

161

90

59

54

(173)

(120)

27

227

2,699

2,735

(390)

(149)

2,309

2,586

725

678

Net liability for future policy benefits, before reinsurance recoverable

276

244

1,001

922

Less: Reinsurance recoverable on future policy benefits

109

111

Net liability for future policy benefits, after reinsurance recoverable

$ 892

$ 811

Whole Life Insurance | Segment Life [Member]

10 years 2 months 12 days

Liability for Future Policy Benefit, Activity [Line Items]

$ 3,950

$ 2,308

3,945

2,361

Effect of actual variances from expected experience

160

40

9

77

4,114

2,478

1,690

942

223

91

62

^[2]

(852)

(376)

14

(72)

4,309

4,005

94

(62)

4,403

3,943

10,063

5,696

9,991

5,874

Effect of actual variances from expected experience

181

44

21

86

10,193

6,004

3,659

942

223

240

176

(260)

(212)

55

30

11,170

9,880

739

(274)

11,909

9,606

7,506

5,663

Net liability for future policy benefits, before reinsurance recoverable

1,120

709

8,626

6,372

Less: Reinsurance recoverable on future policy benefits

45

47

Net liability for future policy benefits, after reinsurance recoverable

$ 8,581

$ 6,325

Accident and Health Insurance Product Line [Member] | Segment Life [Member]

27 years 9 months 18 days

26 years 6 months

Liability for Future Policy Benefit, Activity [Line Items]

$ 10,432

$ 10,711

10,692

11,258

Effect of actual variances from expected experience

394

(813)

(126)

(170)

10,960

10,275

145

1,717

1,026

424

421

^[2]

(1,105)

(998)

(158)

(592)

11,838

10,277

136

(496)

11,974

9,781

14,650

15,038

15,071

15,855

Effect of actual variances from expected experience

348

(849)

(127)

(168)

15,292

14,838

163

1,717

1,026

519

514

(1,186)

(1,064)

(188)

(1,062)

16,154

14,415

65

(790)

16,219

13,625

4,245

3,844

Net liability for future policy benefits, before reinsurance recoverable

194

156

4,439

4,000

Less: Reinsurance recoverable on future policy benefits

112

103

Net liability for future policy benefits, after reinsurance recoverable

$ 4,327

$ 3,897

Insurance, Other | Segment Life [Member]

9 years 9 months 18 days

10 years 3 months 18 days

Liability for Future Policy Benefit, Activity [Line Items]

$ 64

$ 42

64

43

Effect of actual variances from expected experience

(4)

2

(1)

59

44

12

53

5

3

1

^[2]

(27)

(15)

14

(1)

102

46

1

(1)

103

45

495

269

492

280

Effect of actual variances from expected experience

(5)

3

$ 0

$ (1)

487

282

233

53

5

11

6

(14)

(9)

41

154

578

671

41

(11)

619

660

516

615

Net liability for future policy benefits, before reinsurance recoverable

32

14

548

629

Less: Reinsurance recoverable on future policy benefits

0

21

Net liability for future policy benefits, after reinsurance recoverable

$ 548

$ 608

17 years 7 months 6 days

15 years 1 month 6 days

[1]	Net of valuation allowance for uncollectible reinsurance.
[2]	Net premiums collected represent the portion of gross premiums collected from policyholders that is used to fund expected benefit.

Future policy benefits (Undiscounted & discounted FPB) (Details) - Segment Life [Member] - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Liability for Future Policy Benefit, Activity [Line Items]
Discounted expected future benefit payments	$ 31,056	$ 27,462	$ 26,477	$ 23,324
Term Life Insurance
Liability for Future Policy Benefit, Activity [Line Items]
Undiscounted expected future benefit payments	4,188		4,043
Undiscounted expected future gross premiums	6,669		6,588
Discounted expected future benefit payments	2,309	2,254	2,586	2,321
Discounted expected future gross premiums	4,504		3,741
Whole Life Insurance
Liability for Future Policy Benefit, Activity [Line Items]
Undiscounted expected future benefit payments	28,111		23,454
Undiscounted expected future gross premiums	10,363		9,478
Discounted expected future benefit payments	11,909	10,063	9,606	5,696
Discounted expected future gross premiums	8,404		7,654
Accident and Health Insurance Product Line [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Undiscounted expected future benefit payments	27,423		23,914
Undiscounted expected future gross premiums	40,183		35,029
Discounted expected future benefit payments	16,219	14,650	13,625	15,038
Discounted expected future gross premiums	23,655		21,241
Insurance, Other
Liability for Future Policy Benefit, Activity [Line Items]
Undiscounted expected future benefit payments	1,046		774
Undiscounted expected future gross premiums	200		104
Discounted expected future benefit payments	619	$ 495	660	$ 269
Discounted expected future gross premiums	$ 177		$ 92

Future policy benefits (Premiums & interest) (Details) - Segment Life [Member] - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Liability for Future Policy Benefit, Activity [Line Items]
Gross Premiums or Assessments	$ 4,305	$ 3,558
Interest Accretion	266	221
Term Life Insurance
Liability for Future Policy Benefit, Activity [Line Items]
Gross Premiums or Assessments	509	484
Interest Accretion	14	9
Whole Life Insurance
Liability for Future Policy Benefit, Activity [Line Items]
Gross Premiums or Assessments	1,504	864
Interest Accretion	149	114
Accident and Health Insurance Product Line [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Gross Premiums or Assessments	2,250	2,182
Interest Accretion	95	93
Insurance, Other
Liability for Future Policy Benefit, Activity [Line Items]
Gross Premiums or Assessments	42	28
Interest Accretion	$ 8	$ 5

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480081/944-40-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)(6)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480081/944-40-50-6

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)(5)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480081/944-40-50-6

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480081/944-40-50-6

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480081/944-40-50-6

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480081/944-40-50-6

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480016/944-40-65-2

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480081/944-40-50-6

Reference 9: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 55
-Paragraph 29E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480046/944-40-55-29E

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480081/944-40-50-6

Future policy benefits (Weighted average interest rates) (Details) - Segment Life [Member]	Sep. 30, 2024	Sep. 30, 2023
Term Life Insurance
Liability for Future Policy Benefit, Activity [Line Items]
Interest Accretion Rate	3.00%	2.90%
Current Discount Rate	5.20%	6.00%
Whole Life Insurance
Liability for Future Policy Benefit, Activity [Line Items]
Interest Accretion Rate	3.20%	3.20%
Current Discount Rate	4.10%	4.70%
Accident and Health Insurance Product Line [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Interest Accretion Rate	3.80%	3.70%
Current Discount Rate	5.80%	6.70%
Insurance, Other
Liability for Future Policy Benefit, Activity [Line Items]
Interest Accretion Rate	2.70%	2.60%
Current Discount Rate	3.80%	4.30%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480081/944-40-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)(6)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480081/944-40-50-6

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)(5)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480081/944-40-50-6

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480081/944-40-50-6

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480081/944-40-50-6

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480081/944-40-50-6

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480016/944-40-65-2

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480081/944-40-50-6

Reference 9: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 55
-Paragraph 29E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480046/944-40-55-29E

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480081/944-40-50-6

Policyholders' account balances (Policyholder Account Balance Rollforward) (Details) - USD ($)
$ in Millions

9 Months Ended

Sep. 30, 2024

Sep. 30, 2023

Dec. 31, 2023

Dec. 31, 2022

$ 6,868

$ 6,574

$ 6,789

$ 2,573

818

418

Policyholder Account Balance, Surrender and Withdrawal

^[1]

(105)

(104)

(327)

(183)

^[2]

(215)

(87)

Policyholder Account Balance, Increase (Decrease) from Other Change

108

68

(200)

(125)

6,868

6,574

6,789

2,573

Policyholder Account Balance, Other Reconciling Items

712

604

673

567

556

8,136

7,178

4,014

Universal Life

1,869

1,785

1,876

1,199

204

174

Policyholder Account Balance, Surrender and Withdrawal

^[1]

(98)

(96)

(95)

(62)

^[2]

(59)

(6)

Policyholder Account Balance, Increase (Decrease) from Other Change

38

30

3

(56)

1,869

1,785

1,876

1,199

Policyholder Account Balance, Weighted Average Crediting Rate

$ 1,869

$ 1,785

2.70%

3.10%

Policyholder Account Balance, Net Amount at Risk

^[3]

$ 12,648

$ 11,705

Policyholder Account Balance, Cash Surrender Value

1,699

1,573

Universal Life | Huatai Group

602

Annuities [Member]

^[4]

2,608

2,340

2,411

0

^[4]

294

79

Policyholder Account Balance, Surrender and Withdrawal

^[1],[4]

0

^[4]

(30)

(8)

^[2],[4]

(116)

(38)

Policyholder Account Balance, Increase (Decrease) from Other Change

^[4]

29

16

^[4]

20

(34)

^[4]

2,608

2,340

2,411

0

Policyholder Account Balance, Weighted Average Crediting Rate

$ 2,608

$ 2,340

1.60%

2.70%

Policyholder Account Balance, Net Amount at Risk

^[3]

$ 0

Policyholder Account Balance, Cash Surrender Value

1,691

1,474

Annuities [Member] | Huatai Group

^[4]

2,325

Insurance, Other

^[5]

2,391

2,449

2,502

1,374

^[5]

320

165

Policyholder Account Balance, Surrender and Withdrawal

^[1],[5]

(7)

(8)

^[5]

(202)

(113)

^[2],[5]

(40)

(43)

Policyholder Account Balance, Increase (Decrease) from Other Change

^[5]

41

22

^[5]

(223)

(35)

^[5]

2,391

2,449

$ 2,502

$ 1,374

Policyholder Account Balance, Weighted Average Crediting Rate

$ 2,391

$ 2,449

2.70%

1.20%

Policyholder Account Balance, Net Amount at Risk

^[3]

$ 440

$ 576

Policyholder Account Balance, Cash Surrender Value

$ 2,091

2,173

Insurance, Other | Huatai Group

Separate Account, Liability [Line Items]

^[5]

$ 1,087

[1]	Contracts included in the policyholder account balances are generally charged a premium and/or monthly assessments on the basis of the account balance.
[2]	Includes benefit payments upon maturity as well as death benefits.
[3]	For those guarantees of benefits that are payable in the event of death, the net amount at risk is defined as the current guaranteed minimum death benefit in excess of the current account balance at the balance sheet date.
[4]	Relates to Huatai Life.
[5]	Primarily comprises policyholder account balances related to investment linked products including endowment and investment contracts, none of which bear significant insurance risk.

Policyholders' account balances (Guaranteed Minimum Crediting Rates) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	$ 8,136	$ 7,462	$ 7,178
Universal Life
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	1,869		1,785
Universal Life \| Policyholder Account Balance, at Guaranteed Minimum Crediting Rate
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	726		522
Universal Life \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	371		330
Universal Life \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	680		589
Universal Life \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	92		344
Annuities [Member]
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	2,608		2,340
Annuities [Member] \| Policyholder Account Balance, at Guaranteed Minimum Crediting Rate
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	916		797
Annuities [Member] \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	0		0
Annuities [Member] \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	1,645		1,543
Annuities [Member] \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	47		0
Insurance, Other
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	2,391		2,449
Insurance, Other \| Policyholder Account Balance, at Guaranteed Minimum Crediting Rate
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	1,666		1,116
Insurance, Other \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	52		531
Insurance, Other \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	214		257
Insurance, Other \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	459		545
Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200 \| Universal Life
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	603		462
Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200 \| Universal Life \| Policyholder Account Balance, at Guaranteed Minimum Crediting Rate
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	464		421
Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200 \| Universal Life \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	0		0
Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200 \| Universal Life \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	47		30
Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200 \| Universal Life \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	92		11
Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200 \| Annuities [Member]
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	1,764		2,236
Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200 \| Annuities [Member] \| Policyholder Account Balance, at Guaranteed Minimum Crediting Rate
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	72		693
Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200 \| Annuities [Member] \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	0		0
Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200 \| Annuities [Member] \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	1,645		1,543
Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200 \| Annuities [Member] \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	47		0
Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200 \| Insurance, Other
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	1,024		1,513
Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200 \| Insurance, Other \| Policyholder Account Balance, at Guaranteed Minimum Crediting Rate
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	349		738
Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200 \| Insurance, Other \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	2		0
Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200 \| Insurance, Other \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	214		230
Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200 \| Insurance, Other \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	459		545
Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 \| Universal Life
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	1,253		1,302
Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 \| Universal Life \| Policyholder Account Balance, at Guaranteed Minimum Crediting Rate
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	249		80
Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 \| Universal Life \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	371		330
Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 \| Universal Life \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	633		559
Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 \| Universal Life \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	0		333
Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 \| Annuities [Member]
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	844		104
Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 \| Annuities [Member] \| Policyholder Account Balance, at Guaranteed Minimum Crediting Rate
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	844		104
Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 \| Annuities [Member] \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	0		0
Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 \| Annuities [Member] \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	0		0
Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 \| Annuities [Member] \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	0		0
Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 \| Insurance, Other
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	1,367		931
Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 \| Insurance, Other \| Policyholder Account Balance, at Guaranteed Minimum Crediting Rate
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	1,317		373
Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 \| Insurance, Other \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	50		531
Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 \| Insurance, Other \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	0		27
Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 \| Insurance, Other \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	0		0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater \| Universal Life
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	13		21
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater \| Universal Life \| Policyholder Account Balance, at Guaranteed Minimum Crediting Rate
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	13		21
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater \| Universal Life \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	0		0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater \| Universal Life \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	0		0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater \| Universal Life \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	0		0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater \| Annuities [Member]
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	0		0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater \| Annuities [Member] \| Policyholder Account Balance, at Guaranteed Minimum Crediting Rate
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	0		0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater \| Annuities [Member] \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	0		0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater \| Annuities [Member] \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	0		0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater \| Annuities [Member] \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	0		0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater \| Insurance, Other
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	0		5
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater \| Insurance, Other \| Policyholder Account Balance, at Guaranteed Minimum Crediting Rate
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	0		5
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater \| Insurance, Other \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	0		0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater \| Insurance, Other \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	0		0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater \| Insurance, Other \| Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance	$ 0		$ 0
Minimum \| Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance, Guaranteed Minimum Crediting Rate	2.01%
Minimum \| Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance, Guaranteed Minimum Crediting Rate	4.00%
Maximum \| Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance, Guaranteed Minimum Crediting Rate	2.00%
Maximum \| Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance, Guaranteed Minimum Crediting Rate	4.00%

Separate accounts (Fair value of assets) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Fair Value, Separate Account Investment [Line Items]
Separate account assets	$ 5,996	$ 5,573	$ 5,306
Separate Account, Cash and Cash Equivalents
Fair Value, Separate Account Investment [Line Items]
Separate account assets	75		88
Fixed maturities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	77		89
Mutual funds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	$ 5,844		$ 5,129

Separate accounts (Separate account liabilities rollforward) (Details) - USD ($)
$ in Millions

9 Months Ended

Sep. 30, 2024

Sep. 30, 2023

Separate Account, Liability, Beginning Balance

$ 5,573

$ 5,190

Separate Account, Liability, Premium and Deposit

945

724

Separate Account, Liability, Policy Charge

(118)

(103)

Separate Account, Liability, Surrender and Withdrawal

(666)

(407)

Separate Account, Liability, Benefit Payment

(320)

(291)

Separate Account, Liability, Increase (Decrease) from Invested Performance

625

382

Separate Account, Liability, Increase (Decrease) from Other Change

(43)

(189)

Separate Account, Liability, Ending Balance

5,996

5,306

Separate Account, Liability, Cash Surrender Value, Amount

^[1]

$ 5,790

$ 5,285

[1]	Cash surrender value represents the amount of the policyholders account balances distributable at the balance sheet date less certain surrender charges.

Unearned revenue liability (URL Rollforward) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Insurance [Abstract]
Balance – beginning of period	$ 712	$ 604	$ 673	$ 567
Deferred revenue	106	96
Amortization	(54)	(44)
Other (including foreign exchange)	(13)	(15)
Balance – end of period	$ 712	$ 604	$ 673	$ 567

Market risk benefits (MRB Roll-Forward) (Details) - USD ($)
$ in Millions

3 Months Ended

9 Months Ended

Sep. 30, 2024

Sep. 30, 2023

Sep. 30, 2024

Sep. 30, 2023

Market Risk Benefit [Line Items]

Market Risk Benefit, Liability, beginning of period

$ 771

Market Risk Benefit, Liability, end of period

$ 748

748

Market risk benefits gains (losses)

(230)

$ (32)

(238)

$ (154)

Long-Duration Insurance, Other | Variable Annuity

Market Risk Benefit [Line Items]

Market Risk Benefit, Liability, beginning of period

771

800

Balance, beginning of period, before effect of changes in the instrument-specific credit risk

749

776

Interest rate changes

10

(117)

Effect of changes in equity markets

(147)

(69)

Effect of changes in volatilities

9

51

Market Risk Benefit, Increase (Decrease) from Actual Policyholder Behavior Different from Expected

55

16

Market Risk Benefit, Increase (Decrease) from Future Expected Policyholder Behavior Assumption

87

89

Effect of timing and all other

(34)

3

Balance, end of period, before effect of changes in the instrument-specific credit risk

729

749

729

749

Effect of changes in the instrument-specific credit risk

19

21

19

21

Market Risk Benefit, Liability, end of period

748

770

748

770

Market Risk Benefit, Net Amount at Risk

^[1]

$ 1,595

$ 2,138

1,595

2,138

Market Risk Benefits Other Gains (Losses)

$ (258)

$ (181)

Weighted-average age of policyholders (years)

74 years

73 years

[1]

The net amount at risk is defined as the present value of future claim payments assuming policy account values and guaranteed values are fixed at the valuation date, and reinsurance coverage ends at the earlier of the maturity of the underlying variable annuity policy or the reinsurance treaty. No withdrawals, lapses, and mortality improvements are assumed in the projection. GLB-related risks contain conservative mortality and annuitization assumptions.

Market Risk Benefits (MRB Valuation) (Details)

9 Months Ended

Sep. 30, 2024

Sep. 30, 2023

Minimum

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]

Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate

0.50%

Significant Unobservable Inputs Annuitization Rate

0.00%

Maximum

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]

Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate

27.30%

30.00%

Significant Unobservable Inputs Annuitization Rate

100.00%

Weighted Average

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]

Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate

^[1]

3.40%

4.00%

Significant Unobservable Inputs Annuitization Rate

^[1]

4.60%

4.80%

[1]	The weighted-average lapse and annuitization rates are determined by weighting each treaty's rates by the MRB contract's fair value.

Debt (Detail) - Senior Notes [Member] - USD ($) $ in Millions	Sep. 30, 2024	Jul. 31, 2024	Mar. 07, 2024
INA Senior Notes Due March 2034 [Domain]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,600	$ 600	$ 1,000
Debt Instrument, Interest Rate, Stated Percentage		5.00%	5.00%
INA Senior Notes Due August 2029 [Domain]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 700
Debt Instrument, Interest Rate, Stated Percentage		4.65%
INA Senior Notes Due March 2034 and July 2034 [Domain]
Debt Instrument [Line Items]
Make Whole Premium Additional Percent	0.15%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
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-Paragraph 1
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Paragraph 1D
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1D
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1E
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1E
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1E
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1F
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1F
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1F
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F

Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1F
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F

Reference 25: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1I
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I

Reference 26: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482925/835-30-45-2

Reference 27: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482900/835-30-50-1

Foreign currency forward contracts

Commitments, Contingencies, And Guarantees (Narrative) (Detail) € in Millions, $ in Millions	Sep. 30, 2024 USD ($)	Sep. 30, 2024 EUR (€)	Dec. 31, 2023 USD ($)
Financial Instruments Owned and Pledged as Collateral [Line Items]
Hedged Liability, Fair Value Hedge	$ 1,700	€ 1,500
Repurchase agreements	3,048		$ 2,833
Purchase Commitment, Remaining Minimum Amount Committed	1,200		1,000
Carrying value of limited partnerships and partially-owned investment companies included in other investments	14,200		13,900
Funding commitments relating to limited partnerships and partially-owned investment companies	6,800		6,200
Unrecognized tax benefits	83
Operating Lease, Right-of-Use Asset	748		784
Operating Lease, Liability	$ 817		$ 832
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities	Other liabilities
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets (includes VIE balances of $19 and $33)	Other assets (includes VIE balances of $19 and $33)	Other assets (includes VIE balances of $19 and $33)
Derivative Liability, Subject to Master Netting Arrangement, after Offset	$ 139		$ 115

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

Sep. 30, 2024

Dec. 31, 2023

Options/Futures contracts on notes and bonds

$ 4,399

$ 3,662

1,602

2,062

Convertible securities

Investment And Embedded Derivative Instruments [Member]

^[1]

65

64

103

110

(127)

(136)

Futures contracts on equities

6,066

5,788

Designated as Hedging Instrument

^[2]

967

1,157

150

136

(174)

128

4,621

3,250

Fair Value Hedging

1,652

1,631

Net Investment Hedging

Other derivative instruments

2,969

1,619

Other Derivative Instruments [Member]

355

217

Other Assets [Member] | Foreign currency forward contracts

1,322

1,374

Other Assets [Member] | Options/Futures contracts on notes and bonds

38

27

Other Assets [Member] | Futures contracts on equities

4

27

Other Assets [Member] | Fair Value Hedging

^[2]

0

Other Assets [Member] | Net Investment Hedging

130

126

Other Assets [Member] | Other derivative instruments

20

10

Other Assets [Member] | Other Derivative Instruments [Member]

0

Fixed Maturities [Member] | Convertible securities

0

Derivative Asset, Not Subject to Master Netting Arrangement

^[1]

61

56

Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Foreign currency forward contracts

Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Options/Futures contracts on notes and bonds

(125)

(94)

Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Futures contracts on equities

(2)

(42)

Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Fair Value Hedging

^[2]

(25)

(37)

Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Net Investment Hedging

0

Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Other derivative instruments

(174)

(128)

Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Other Derivative Instruments [Member]

(5)

Equity Securities | Convertible securities

(30)

(42)

Derivative Liability, Not Subject to Master Netting Arrangement

^[1]

$ 0

[1]	Includes fair value of embedded derivatives.
[2]	Related to MRB book of business.

Commitment, Contingencies, And Guarantees (Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Financial Instruments Owned and Pledged as Collateral [Line Items]
Interest expense reclassified from OCI	$ 192	$ 174	$ 552	$ 499
Fair Value Hedging
Financial Instruments Owned and Pledged as Collateral [Line Items]
Gain (loss) recognized in OCI	42	(17)	(12)	23
Net realized gain (loss) reclassified from OCI	63	(51)	14	(20)
Interest expense reclassified from OCI	(3)	(4)	(11)	(12)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	$ (18)	$ 38	$ (15)	$ 55

Derivative Instruments, Gain (Loss) [Line Items]

Amount of interest expense classified as operating and nonoperating. Includes, but is not limited to, cost of borrowing accounted for as interest expense.

+ References + Details

Commitments, Contingencies, And Guarantees (Schedule of Net Investment Hedges, Statements of Financial Performance and Financial Position, Location) (Details) - Net Investment Hedging - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Financial Instruments Owned and Pledged as Collateral [Line Items]
Gain (loss) recognized in OCI	$ (98)	$ (20)	$ (25)	$ (8)
Interest income reclassified from OCI	5	3	11	10
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	$ (103)	$ (23)	$ (36)	$ (18)

Commitments, Contingencies, And Guarantees (Net Realized Gains (Losses) Of Derivative Instrument Activity In Consolidated Statement Of Operations) (Detail) - USD ($)
$ in Millions

3 Months Ended

9 Months Ended

Sep. 30, 2024

Sep. 30, 2023

Sep. 30, 2024

Sep. 30, 2023

Foreign currency forward contracts

$ 23

$ 54

$ (158)

$ (178)

Derivative Instruments, Gain (Loss) [Line Items]

Options/Futures contracts on notes and bonds

52

(17)

(28)

(95)

Derivative Instruments, Gain (Loss) [Line Items]

Derivative Instruments, Gain (Loss) [Line Items]

12

29

30

5

Convertible securities

Investment And Embedded Derivative Instruments [Member]

^[1]

2

(3)

4

(2)

Derivative Instruments, Gain (Loss) [Line Items]

Futures contracts on equities

66

9

6

(92)

Derivative Instruments, Gain (Loss) [Line Items]

Other derivative instruments

^[2]

(41)

52

(157)

(80)

Derivative Instruments, Gain (Loss) [Line Items]

Other Derivative Instruments [Member]

(2)

(7)

(6)

Derivative Instruments, Gain (Loss) [Line Items]

Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]

$ (43)

$ 45

$ (164)

$ (86)

[1]	Includes embedded derivatives.
[2]	Related to MRB book of business.

Commitments, contingencies, and guarantees Commitments, Contingencies, And Guarantees (Transactions accounted for as secured borrowings) (Detail) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending collateral	$ 1,927	$ 1,299
Securities lending payable	1,927	1,299
Cash [Member] \| Overnight and Continuous [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending collateral	784	555
U.S. Treasury / Agency \| Overnight and Continuous [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending collateral	361	33
Foreign [Member] \| Overnight and Continuous [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending collateral	680	621
Corporate and asset-backed securities \| Overnight and Continuous [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending collateral	64	57
Equity Securities \| Overnight and Continuous [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending collateral	35	27
Municipal \| Overnight and Continuous [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending collateral	$ 3	$ 6

Commitments, contingencies, and guarantees Commitments, Contingencies, And Guarantees (Collateral pledged under repurchase agreements) (Details) - USD ($)
$ in Millions

Sep. 30, 2024

Dec. 31, 2023

Repurchase agreements

$ 3,048

$ 2,833

Asset Pledged as Collateral without Right

Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]

Cash [Member] | Asset Pledged as Collateral without Right

3,273

2,924

Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]

U.S. Treasury / Agency | Asset Pledged as Collateral without Right

0

34

Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]

Mortgage-backed securities | Asset Pledged as Collateral without Right

100

105

Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]

Repurchase Agreements [Member]

1,405

1,430

Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]

Secured Borrowings, Gross, Difference, Amount

^[1]

225

91

Non-US [Member] | Asset Pledged as Collateral without Right

Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]

Maturity Less than 30 Days [Member] | Asset Pledged as Collateral without Right

1,768

1,355

Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]

Maturity Less than 30 Days [Member] | Cash [Member] | Asset Pledged as Collateral without Right

2,237

1,355

Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]

Maturity Less than 30 Days [Member] | U.S. Treasury / Agency | Asset Pledged as Collateral without Right

0

Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]

Maturity Less than 30 Days [Member] | Mortgage-backed securities | Asset Pledged as Collateral without Right

0

Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]

Maturity Less than 30 Days [Member] | Non-US [Member] | Asset Pledged as Collateral without Right

469

0

Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]

Maturity 30 to 90 Days [Member] | Asset Pledged as Collateral without Right

1,768

1,355

Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]

Maturity 30 to 90 Days [Member] | Cash [Member] | Asset Pledged as Collateral without Right

559

1,051

Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]

Maturity 30 to 90 Days [Member] | U.S. Treasury / Agency | Asset Pledged as Collateral without Right

0

33

Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]

Maturity 30 to 90 Days [Member] | Mortgage-backed securities | Asset Pledged as Collateral without Right

100

105

Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]

Maturity 30 to 90 Days [Member] | Non-US [Member] | Asset Pledged as Collateral without Right

459

913

Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]

Maturity Greater than 90 Days [Member] | Asset Pledged as Collateral without Right

0

Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]

Maturity Greater than 90 Days [Member] | Cash [Member] | Asset Pledged as Collateral without Right

477

518

Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]

Maturity Greater than 90 Days [Member] | U.S. Treasury / Agency | Asset Pledged as Collateral without Right

0

1

Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]

Maturity Greater than 90 Days [Member] | Mortgage-backed securities | Asset Pledged as Collateral without Right

0

Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]

Maturity Greater than 90 Days [Member] | Non-US [Member] | Asset Pledged as Collateral without Right

477

517

Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]

Equity in net income (loss) of partially-owned entities

$ 0

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

Shareholders' equity (Details)			9 Months Ended
Shareholders' equity (Details)	May 21, 2024 shares	May 22, 2023 shares	Sep. 30, 2024 SFr / shares shares	May 16, 2024 $ / shares	Dec. 31, 2023 SFr / shares shares	May 17, 2023 $ / shares	May 19, 2022 $ / shares
Stockholders' Equity Note [Abstract]
Common Shares, par value \| SFr / shares			SFr 0.50		SFr 0.50
Treasury Stock, Shares, Retired \| shares	11,825,600	14,925,028	11,825,600
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures \| shares			2,679,748
Common Stock, Dividend Rate Approved \| $ / shares				$ 0.91		$ 0.86	$ 0.83
Annual dividend per share approved by shareholders \| $ / shares				3.64		3.44	3.32
Equity, Class of Treasury Stock [Line Items]
Common Stock, Dividend Rate Approved \| $ / shares				0.91		0.86	0.83
Treasury Stock, Shares, Retired \| shares	11,825,600	14,925,028	11,825,600
Treasury Stock, Common, Shares \| shares			16,592,565		26,181,949
Common Shares, par value \| SFr / shares			SFr 0.50		SFr 0.50
Annual dividend per share approved by shareholders \| $ / shares				$ 3.64		$ 3.44	$ 3.32

Shareholders' equity Dividends Declared (Details)	3 Months Ended				9 Months Ended
Shareholders' equity Dividends Declared (Details)	Sep. 30, 2024 SFr / shares	Sep. 30, 2024 $ / shares	Sep. 30, 2023 SFr / shares	Sep. 30, 2023 $ / shares	Sep. 30, 2024 SFr / shares	Sep. 30, 2024 $ / shares	Sep. 30, 2023 SFr / shares	Sep. 30, 2023 $ / shares
Equity, Class of Treasury Stock [Line Items]
Common Stock, Dividends, Per Share, Declared \| (per share)	SFr 0.78	$ 0.91	SFr 0.75	$ 0.86	SFr 2.35	$ 2.68	SFr 2.29	$ 2.55

Shareholders' equity Share Repurchases (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Jul. 01, 2023	May 19, 2022
May 2022 Stock Repurchase Plan
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Authorized Amount						$ 2,500
Number of shares repurchased				8,634,600
Cost of shares repurchased				$ 1,758
Repurchase authorization remaining at end of period		$ 4,398		4,398
July 2023 Stock Repurchase Plan
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Authorized Amount					$ 5,000
Number of shares repurchased	1,441,607	2,949,900	4,915,964
Cost of shares repurchased	$ 413	$ 606	$ 1,299
Repurchase authorization remaining at end of period	$ 2,400	$ 4,398	$ 2,400	$ 4,398

Shareholders' equity AOCI (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Shareholders' equity AOCI (Details) - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance – beginning of period, net of tax			$ 59,507
Other comprehensive income (loss), before income tax	$ 3,205	$ (1,772)	1,601	$ (1,305)
Other Comprehensive Income (Loss), Tax	150	0	112	104
Other Comprehensive Income (Loss), Net of Tax	3,055	(1,772)	1,489	(1,409)
Balance – end of period, net of tax	65,757	52,373	65,757	52,373
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance – beginning of period, net of tax	(5,301)	(6,809)	(4,177)	(7,279)
Balance – end of period, net of tax	(2,042)	(8,953)	(2,042)	(8,953)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Including Noncontrolling Interest
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	3,419	(2,240)	2,139	(1,935)
Net Realized Gains (Losses) Reclassified from AOCI	(40)	(70)	(154)	(357)
Other comprehensive income (loss), before income tax	3,459	(2,170)	2,293	(1,578)
Other Comprehensive Income (Loss), Tax	198	(29)	149	93
Other Comprehensive Income (Loss), Net of Tax	3,261	(2,141)	2,144	(1,671)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Noncontrolling Interest
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other Comprehensive Income (Loss), Net of Tax	2	3	9	3
AOCI, Liability for Future Policy Benefit, Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance – beginning of period, net of tax	66	(247)	51	(75)
Balance – end of period, net of tax	(527)	404	(527)	404
AOCI, Liability for Future Policy Benefit, Including Noncontrolling Interest
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other comprehensive income (loss), before income tax	(672)	683	(672)	497
Other Comprehensive Income (Loss), Tax	(36)	35	(14)	21
Other Comprehensive Income (Loss), Net of Tax	(636)	648	(658)	476
AOCI, Liability for Future Policy Benefit, Noncontrolling Interest
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other Comprehensive Income (Loss), Net of Tax	(43)	(3)	(80)	(3)
AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance – beginning of period, net of tax	(13)	(16)	(22)	(24)
Balance – end of period, net of tax	(20)	(21)	(20)	(21)
AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, Including Noncontrolling Interest
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other comprehensive income (loss), before income tax	(8)	(5)	2	3
Other Comprehensive Income (Loss), Tax	(1)	0	0	0
Other Comprehensive Income (Loss), Net of Tax	(7)	(5)	2	3
AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, Noncontrolling Interest
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other Comprehensive Income (Loss), Net of Tax	0	0	0	0
Cumulative Foreign Currency Translation Adjustment [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance – beginning of period, net of tax	(3,342)	(2,920)	(2,945)	(2,966)
Balance – end of period, net of tax	(2,952)	(3,148)	(2,952)	(3,148)
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	450	(314)	6	(269)
Net Realized Gains (Losses) Reclassified from AOCI	5	3	11	10
Other comprehensive income (loss), before income tax	445	(317)	(5)	(279)
Other Comprehensive Income (Loss), Tax	(7)	(13)	(19)	(21)
Other Comprehensive Income (Loss), Net of Tax	452	(304)	14	(258)
Accumulated Foreign Currency Adjustment Attributable to Noncontrolling Interest
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other Comprehensive Income (Loss), Net of Tax	62	(76)	21	(76)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance – beginning of period, net of tax	(11)	(53)	(13)	(66)
Balance – end of period, net of tax	(25)	(22)	(25)	(22)
Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	42	(17)	(12)	23
Net Realized Gains (Losses) Reclassified from AOCI	60	(55)	3	(32)
Other comprehensive income (loss), before income tax	(18)	38	(15)	55
Other Comprehensive Income (Loss), Tax	(4)	7	(3)	11
Other Comprehensive Income (Loss), Net of Tax	(14)	31	(12)	44
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Noncontrolling Interest
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other Comprehensive Income (Loss), Net of Tax	0	0	0	0
Postretirement Benefit Liability Adjustment [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance – beginning of period, net of tax	297	223	297	225
Balance – end of period, net of tax	296	222	296	222
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other comprehensive income (loss), before income tax	(1)	(1)	(2)	(3)
Other Comprehensive Income (Loss), Tax	0	0	(1)	0
Other Comprehensive Income (Loss), Net of Tax	(1)	(1)	(1)	(3)
Accumulated Defined Benefit Plans Adjustment Attributable to Noncontrolling Interest
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other Comprehensive Income (Loss), Net of Tax	0	0	0	0
Accumulated Other Comprehensive Income (Loss) [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance – beginning of period, net of tax	(8,304)	(9,822)	(6,809)	(10,185)
Other Comprehensive Income (Loss), Net of Tax	3,034	(1,696)	1,539	(1,333)
Balance – end of period, net of tax	$ (5,270)	$ (11,518)	$ (5,270)	$ (11,518)

Shareholders' equity AOCI Reclassifications (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Equity, Class of Treasury Stock [Line Items]
Interest expense	$ 192	$ 174	$ 552	$ 499
Income Tax (Expense) Benefit	(504)	(413)	(1,336)	(1,189)
Net income (loss)	2,324	2,043	6,697	5,728
Reclassification out of Accumulated Other Comprehensive Income
Equity, Class of Treasury Stock [Line Items]
Net income (loss)	29	(86)	(101)	(315)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] \| Reclassification out of Accumulated Other Comprehensive Income
Equity, Class of Treasury Stock [Line Items]
Debt Securities, Available-for-sale, Realized Gain	(40)	(70)	(154)	(357)
Income Tax (Expense) Benefit	17	25	(41)	(59)
Net income (loss)	(23)	(45)	(113)	(298)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent \| Reclassification out of Accumulated Other Comprehensive Income
Equity, Class of Treasury Stock [Line Items]
Foreign Currency Transaction Gain (Loss), Realized	63	(51)	14	(20)
Interest expense	(3)	(4)	(11)	(12)
Income Tax (Expense) Benefit	(12)	(12)	0	(7)
Net income (loss)	48	(43)	3	(25)
Cumulative Foreign Currency Translation Adjustment [Member] \| Reclassification out of Accumulated Other Comprehensive Income
Equity, Class of Treasury Stock [Line Items]
Interest expense	5	3	11	10
Income Tax (Expense) Benefit	(1)	1	2	2
Net income (loss)	$ 4	$ 2	$ 9	$ 8

Share-Based Compensation (Detail) - $ / shares		9 Months Ended
Share-Based Compensation (Detail) - $ / shares	Feb. 26, 2024	Sep. 30, 2024
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period in years		3 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period		3 years
Award term period in years		10 years
Stock options granted	1,359,237
Weighted-average grant date fair value for stock options granted	$ 64.15
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	685,665
Grant date fair value of awards except for options granted to employees and officers of the company	$ 254.84
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	101,514
Grant date fair value of awards except for options granted to employees and officers of the company	$ 254.84
Restricted Stock Units (RSUs) [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	290,085
Grant date fair value of awards except for options granted to employees and officers of the company	$ 254.84
PerformanceBasedStockUnits(PSU)
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	284,013
Grant date fair value of awards except for options granted to employees and officers of the company	$ 254.84

Postretirement benefits Components of net periodic benefit costs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans
Service cost	$ 2	$ 2	$ 7	$ 6
Non-service (benefit) cost	(31)	(22)	(93)	(73)
Net periodic benefit cost (benefit)	(29)	(20)	(86)	(67)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans
Service cost	0	0	0	0
Interest cost	0	1	1	2
Expected return on plan assets	0	0	(2)	(2)
Defined Benefit Plan, Amortization of Gain (Loss)	(1)	(1)	(2)	(1)
Amortization of prior service cost	0	(1)	0	(1)
Settlements	0	0	0	0
Non-service (benefit) cost	(1)	(1)	(3)	(2)
Net periodic benefit cost (benefit)	(1)	(1)	(3)	(2)
Losses and loss expenses \| Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans
Service cost	0	0	0	0
Non-service (benefit) cost	(3)	(1)	(9)	(6)
Losses and loss expenses \| Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans
Service cost	0	0	0	0
Non-service (benefit) cost	0	0	0	0
Administrative Expense \| Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans
Service cost	2	2	7	6
Non-service (benefit) cost	(28)	(21)	(84)	(67)
Administrative Expense \| Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans
Service cost	0	0	0	0
Non-service (benefit) cost	(1)	(1)	(3)	(2)
Foreign Plan [Member] \| Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans
Service cost	2	2	7	6
Interest cost	9	9	27	27
Expected return on plan assets	(13)	(13)	(38)	(38)
Defined Benefit Plan, Amortization of Gain (Loss)	0	0	1	0
Amortization of prior service cost	0	0	0	0
Settlements	0	0	0	0
Non-service (benefit) cost	(4)	(4)	(10)	(11)
Net periodic benefit cost (benefit)	(2)	(2)	(3)	(5)
UNITED STATES \| Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans
Service cost	0	0	0	0
Interest cost	33	35	100	103
Expected return on plan assets	(61)	(56)	(183)	(168)
Defined Benefit Plan, Amortization of Gain (Loss)	0	0	(1)	0
Amortization of prior service cost	0	0	0	0
Settlements	1	3	1	3
Non-service (benefit) cost	(27)	(18)	(83)	(62)
Net periodic benefit cost (benefit)	$ (27)	$ (18)	$ (83)	$ (62)

Other Income and Expense (Details) - USD ($)
$ in Millions

3 Months Ended

9 Months Ended

Sep. 30, 2024

Sep. 30, 2023

Sep. 30, 2024

Sep. 30, 2023

$ 343

$ 150

$ 621

$ 610

Gains (losses) from fair value changes in separate account assets (1)

^[1]

(30)

(19)

(9)

(56)

Asset management and performance fee revenue

53

55

163

55

Asset management and performance fee expense

(34)

(33)

(102)

(33)

Federal excise and capital taxes

(7)

(6)

(16)

(17)

Partially-owned Investment Companies

0

7

31

9

Total

325

154

626

550

$ 211

$ 51

$ 318

290