The Hartford Financial Services Group, Inc. (HIG) 10-K 21 Feb 25 2024 FY Annual report Financial data

Cover Document

Cover Document - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2024	Feb. 20, 2025	Jun. 28, 2024
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2024
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-13958
Entity Registrant Name	The Hartford Insurance Group, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	13-3317783
Entity Address, Address Line One	One Hartford Plaza
Entity Address, City or Town	Hartford
Entity Address, State or Province	CT
Entity Address, Postal Zip Code	06155
City Area Code	860
Local Phone Number	547-5000
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 29
Entity Common Stock, Shares Outstanding		285,386,985
Documents Incorporated by Reference	Portions of the registrant’s definitive proxy statement for its 2025 annual meeting of stockholders are incorporated by reference in Part III of this Form 10-K.
Entity Central Index Key	0000874766
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Amendment Flag	false
Common Stock, par value $0.01 per share
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	HIG
Security Exchange Name	NYSE
6.10% Notes due October 1, 2041
Title of 12(b) Security	6.10% Senior Notes due October 1, 2041
Trading Symbol	HIG 41
Security Exchange Name	NYSE
Depositary Shares, Each Representing a 1/1,000th Interest in a Share of 6.000% Non-Cumulative Preferred Stock, Series G, par value $0.01 per share
Title of 12(b) Security	Depositary Shares, Each Representing a 1/1,000th Interest in a Share of 6.000% Non-Cumulative Preferred Stock, Series G, par value $0.01 per share
Trading Symbol	HIG PR G
Security Exchange Name	NYSE

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2024
Audit Information [Abstract]
Auditor Firm ID	34
Auditor Name	Deloitte & Touche LLP
Auditor Location	Hartford, Connecticut

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues
Earned premiums	$ 22,567	$ 21,026	$ 19,390
Fee income	1,373	1,300	1,349
Net investment income	2,568	2,305	2,177
Net realized losses	(61)	(188)	(627)
Other revenues	88	84	73
Total revenues	26,535	24,527	22,362
Benefits, losses and expenses
Benefits, losses and loss adjustment expenses	14,874	14,238	13,138
Amortization of deferred policy acquisition costs ("DAC")	2,282	2,044	1,824
Insurance operating costs and other expenses	5,258	4,881	4,841
Interest expense	199	199	213
Amortization of other intangible assets	71	71	71
Restructuring and other costs	2	6	13
Benefits, losses and expenses	22,686	21,439	20,100
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	3,849	3,088	2,262
Income tax expense	738	584	443
Net income	3,111	2,504	1,819
Less: Preferred stock dividends	21	21	21
Net income (loss) available to common stockholders	$ 3,090	$ 2,483	$ 1,798
Earnings per common share
Net income (loss) Basic	$ 10.51	$ 8.09	$ 5.54
Net income (loss) Diluted	$ 10.35	$ 7.97	$ 5.46

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 3,111	$ 2,504	$ 1,819
Other comprehensive income (loss) (“OCI”):
Change in net unrealized gain (loss) on fixed maturities, available-for-sale ("AFS")	(57)	1,112	(4,225)
Change in unrealized losses on fixed maturities with an allowance for credit losses ("ACL")	2	(1)	(5)
Change in net gain on cash flow hedging instruments	19	(19)	34
Change in foreign currency translation adjustments	(8)	6	(10)
Change in liability for future policy benefits adjustments	8	(10)	94
Change in pension and other postretirement plan adjustments	(1)	(96)	143
OCI, net of tax	(37)	992	(3,969)
Comprehensive income (loss)	$ 3,074	$ 3,496	$ (2,150)

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Investments:
Fixed maturities, AFS, at fair value (amortized cost of $44,538 and $41,726, and ACL of $16 and $21)	$ 42,567	$ 39,818
Fixed maturities, at fair value using the fair value option ("FVO Securities")	308	327
Equity securities, at fair value	603	864
Financing Receivable, after Allowance for Credit Loss	6,396	6,087
Limited partnerships and other alternative investments	5,042	4,785
Other investments	226	191
Short-term investments	4,068	3,850
Total investments	59,210	55,922
Cash	183	126
Restricted Cash	51	63
Accrued Investment Income Receivable	450	404
Premiums receivable and agents' balances (net of ACL of $117 and $109)	5,998	5,607
Reinsurance recoverables (net of allowance for uncollectible reinsurance of $75 and $103)	7,140	7,104
Deferred policy acquisition costs	1,239	1,113
Deferred income taxes, net	1,229	1,173
Goodwill	1,911	1,911
Property and equipment, net	888	896
Other intangible assets, net	637	707
Other assets	1,981	1,754
Total assets	80,917	76,780
Liabilities
Unpaid losses and loss adjustment expenses	44,610	42,318
Liability for Future Policy Benefit, before Reinsurance	448	484
Policyholder Account Balance	614	638
Unearned premiums	9,408	8,599
Long-term debt	4,366	4,362
Other liabilities	5,024	5,052
Total liabilities	64,470	61,453
Stockholders’ Equity
Preferred stock, $0.01 par value — 50,000,000 shares authorized, 13,800 shares issued at December 31, 2024 and December 31, 2023, aggregate liquidation preference of $345	334	334
Common Stock, Value, Issued	3	3
Additional paid-in capital	578	648
Retained earnings	21,531	19,007
Treasury Stock, Value	(3,113)	(1,816)
Accumulated other comprehensive loss, net of tax	(2,886)	(2,849)
Total stockholders' equity	16,447	15,327
Total liabilities and stockholders’ equity	$ 80,917	$ 76,780

Consolidated Balance Sheets Par

Consolidated Balance Sheets Parentheticals - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Fixed maturities, AFS, at fair value (amortized cost of $44,538 and $41,726, and ACL of $16 and $21)	$ 44,538	$ 41,726
Debt Securities, Available-for-sale, Allowance for Credit Loss	(16)	(21)
Premiums receivable and agents' balances (net of ACL of $117 and $109)	117	109
Reinsurance Recoverable, Allowance for Credit Loss	$ 75	$ 103
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, 13,800 shares issued	13,800	13,800
Preferred Stock, Liquidation Preference, Value	$ 345	$ 345
Common stock, par value	$ 0.01	$ 0.01
Common Stock, Shares Authorized	1,500,000,000	1,500,000,000
Common Stock, Shares, Issued	326,960,228	326,960,228
Treasury stock, at cost — 39,404,003 and 28,488,130 shares	39,404,003	28,488,130
Commercial Loan [Member]
Financing Receivable, Allowance for Credit Loss	$ 44	$ 51

Consolidated Statement of Chang

Consolidated Statement of Changes in Stockholders' Equity - USD ($) $ in Millions	Total	Preferred Stock, end of period	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock, Common	Treasury Stock, Common Stock Compensation Plan	Accumulated Other Comprehensive Income (Loss) ("AOCI"), net of tax
Beginning balance at Dec. 31, 2021			$ 4	$ 3,309	$ 15,770	$ (1,740)		$ 128
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury Stock, Retired, Cost Method, Amount			(1)	(1,391)		(1,392)
Issuance of shares under incentive and stock compensation plans and other				(154)
Stock-based compensation plans expense				131
Net income	$ 1,819				1,819
Dividends declared on preferred stock					(21)
Dividends declared on common stock					(510)
Treasury stock acquired	(1,600)					(1,550)
Stock Issued During Period, Value, Treasury Stock Reissued							$ 183
Net shares acquired related to employee incentive and stock compensation plans						(58)
Other Comprehensive Income (Loss), Net of Tax								(3,969)
Ending balance at Dec. 31, 2022	$ 13,676	$ 334	$ 3	1,895	17,058	(1,773)		(3,841)
Preferred Stock, Shares Outstanding, Ending Balance at Dec. 31, 2022		13,800
Common Shares Outstanding, beginning of period at Dec. 31, 2021			334,926,000
Common Shares Outstanding (in thousands)
Treasury stock acquired	(22,300,000)		(22,273,000)
Issuance of shares under incentive and stock compensation plans and other			3,285,000
Return of shares under incentive and stock compensation plans to treasury stock			(827,000)
Common Shares Outstanding, end of period at Dec. 31, 2022			315,111,000
Common Shares Outstanding (in thousands)
Cash dividends declared per common share	$ 1.580
Preferred Stock, Dividends Per Share, Declared	$ 1,500
Treasury Stock, Retired, Cost Method, Amount			$ 0	(1,219)		(1,219)
Issuance of shares under incentive and stock compensation plans and other				(153)
Stock-based compensation plans expense				125
Net income	$ 2,504				2,504
Dividends declared on preferred stock					(21)
Dividends declared on common stock					(534)
Treasury stock acquired	(1,400)					(1,414)
Stock Issued During Period, Value, Treasury Stock Reissued							207
Net shares acquired related to employee incentive and stock compensation plans						(55)
Other Comprehensive Income (Loss), Net of Tax								992
Ending balance at Dec. 31, 2023	$ 15,327	$ 334	$ 3	648	19,007	(1,816)		(2,849)
Preferred Stock, Shares Outstanding, Ending Balance at Dec. 31, 2023		13,800
Common Shares Outstanding (in thousands)
Treasury stock acquired	(19,200,000)		(19,238,000)
Issuance of shares under incentive and stock compensation plans and other			3,299,000
Return of shares under incentive and stock compensation plans to treasury stock			(700,000)
Common Shares Outstanding, end of period at Dec. 31, 2023			298,472,000
Common Shares Outstanding (in thousands)
Cash dividends declared per common share	$ 1.745
Preferred Stock, Dividends Per Share, Declared	$ 1,500
Treasury Stock, Retired, Cost Method, Amount			$ 0	0		0
Issuance of shares under incentive and stock compensation plans and other				(203)
Stock-based compensation plans expense				133
Net income	$ 3,111				3,111
Dividends declared on preferred stock					(21)
Dividends declared on common stock					(566)
Treasury stock acquired	(1,500)					(1,515)
Stock Issued During Period, Value, Treasury Stock Reissued							$ 305
Net shares acquired related to employee incentive and stock compensation plans						(87)
Other Comprehensive Income (Loss), Net of Tax								(37)
Ending balance at Dec. 31, 2024	$ 16,447	$ 334	$ 3	$ 578	$ 21,531	$ (3,113)		$ (2,886)
Preferred Stock, Shares Outstanding, Ending Balance at Dec. 31, 2024		13,800
Common Shares Outstanding (in thousands)
Treasury stock acquired	(14,400,000)		(14,443,000)
Issuance of shares under incentive and stock compensation plans and other			4,427,000
Return of shares under incentive and stock compensation plans to treasury stock			(900,000)
Common Shares Outstanding, end of period at Dec. 31, 2024			287,556,000
Common Shares Outstanding (in thousands)
Cash dividends declared per common share	$ 1.930
Preferred Stock, Dividends Per Share, Declared	$ 1,500

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating Activities
Net income	$ 3,111	$ 2,504	$ 1,819
Adjustments to reconcile net income to net cash provided by operating activities
Net realized losses	61	188	627
Additional Cash Flow Elements, Operating Activities
Amortization of deferred policy acquisition costs	2,282	2,044	1,824
Additions to deferred policy acquisition costs	(2,408)	(2,159)	(1,939)
Depreciation and amortization	356	510	625
Loss on extinguishment of debt	0	0	(9)
Other operating activities, net	329	213	109
Increase in reinsurance recoverables	(54)	(155)	(470)
Net change in accrued and deferred income taxes	(100)	(29)	(80)
Increase in insurance liabilities	3,058	1,819	2,192
Increase (Decrease) in Premiums Receivable	(458)	(708)	(562)
Net change in other assets and other liabilities	(268)	(7)	(146)
Cash provided by operating activities	5,909	4,220	4,008
Proceeds from the sale/maturity/prepayment of:
Fixed maturities, AFS	10,808	6,806	14,996
Proceeds From Sale and Maturity of Fair Value Option, Fixed Maturity Securties	50	2	2
Proceeds from Sale and Maturity of Marketable Securities	401	2,173	1,213
Mortgage loans	740	1,036	973
Limited partnerships and other alternative investments	238	295	349
Payments for the purchase of:
Fixed maturities, AFS	(14,023)	(9,105)	(14,255)
Payments for the purchase of Fair Value Option Fixed Maturity Securties	(52)	0	(216)
Equity securities at fair value	(44)	(1,183)	(1,371)
Mortgage loans	(1,025)	(1,055)	(1,596)
Limited partnerships and other alternative investments	(664)	(966)	(1,095)
Net proceeds from (payments for) derivatives	35	(129)	54
Net additions to property and equipment	(145)	(215)	(175)
Net payments for short-term investments	(80)	(69)	(160)
Other investing activities, net	(7)	(21)	4
Net cash used for investing activities	(3,768)	(2,431)	(1,277)
Financing Activities
Deposits and other additions to investment and universal life-type contracts	108	96	88
Withdrawals and other deductions from investment and universal life-type contracts	(115)	(100)	(102)
Repayment of debt	0	0	(600)
Net issuance (return of) shares under incentive and stock compensation plans, including related excise tax benefit	22	6	(19)
Treasury stock acquired, including related excise tax paid	(1,514)	(1,400)	(1,550)
Payments for Repurchase of Preferred Stock and Preference Stock	(21)	(21)	(21)
Dividends paid on common stock	(556)	(528)	(506)
Net cash used for financing activities	(2,076)	(1,947)	(2,710)
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations	(20)	3	(14)
Net increase (decrease) in cash and restricted cash	45	(155)	7
Cash and restricted cash — beginning of period	189	344	337
Cash and restricted cash — end of period	234	189	344
Supplemental Disclosure of Cash Flow Information
Income tax paid	812	622	548
Interest paid	$ 211	$ 209	$ 212

Basis of Presentation and Signi

Basis of Presentation and Significant Accounting Policies	12 Months Ended
	Dec. 31, 2024
Accounting Policies [Abstract]
Basis of Presentation and Significant Accounting Policies	1. BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES The Hartford Insurance Group, Inc. ("HIG") is a holding company for insurance and financial services subsidiaries that provide property and casualty ("P&C") insurance, employee group benefits insurance and services and mutual funds and exchange-traded funds ("ETF") to individual and business customers in the United States as well as in the United Kingdom and other international locations (collectively, “The Hartford”, the “Company”, “we” or “our”). Previously known as The Hartford Financial Services Group, Inc., the Company changed its name to The Hartford Insurance Group, Inc. on February 6, 2025. The Hartford conducts business principally in five reportable segments including Business Insurance (formerly "Commercial Lines"), Personal Insurance (formerly "Personal Lines"), Property & Casualty Other Operations, Employee Benefits (formerly "Group Benefits") and Hartford Funds, as well as a Corporate category. The Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) which differ materially from the accounting practices prescribed by various insurance regulatory authorities. Consolidation The Consolidated Financial Statements include the accounts of The Hartford Insurance Group, Inc., and entities in which the Company directly or indirectly has a controlling financial interest. Entities in which the Company has significant influence over the operating and financing decisions but does not control are reported using the equity method. Intercompany transactions and balances between The Hartford and its subsidiaries and affiliates have been eliminated. Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The most significant estimates include those used in determining property and casualty and group long-term disability ("LTD") insurance product reserves, net of reinsurance; evaluation of goodwill for impairment; valuation of investments and derivative instruments; and contingencies relating to corporate litigation and regulatory matters. Adoption of New Accounting Standards Segment Disclosures O n December 31, 2024, the Company adopted the Financial Accounting Standards Board’s (“FASB”) new guidance on Segment Reporting Future Adoption of New Accounting Standards Income Tax Disclosures The FASB issued new disclosure requirements for income taxes primarily for the income tax rate reconciliation and income taxes paid Disaggregated Income Statement Expenses The FASB issued new guidance on disclosures of disaggregated income statement expenses a prospective basis Significant Accounting Policies The Company’s significant accounting policies are as follows: Revenue Recognition Premium Revenue from Direct Insurance and Assumed Reinsurance Property and casualty premiums are earned on a pro rata basis over the policy period and include accruals for policies that have been written by agents but not yet reported to us, as well as ultimate premium revenue anticipated under auditable and retrospectively rated policies. We estimate the amount of premium not yet reported based on current and historical trends of the business being written. Such estimates are regularly reviewed and updated and any resulting adjustments are included in the current year's results. Unearned premiums represent the premiums applicable to the unexpired terms of policies in force, or period of risk. Group life, disability and accident premiums are generally due from policyholders, and recognized as revenue, on a pro rata basis over the period of the contracts. An estimated ACL is recorded on the basis of periodic evaluations of balances due from insureds and considering historical credit loss information, adjusted for current economic conditions as well as reasonable and supportable forecasts when appropriate. The Company records total credit loss expenses related to premiums receivable in insurance operating costs and other expenses. Write-offs of premiums receivable and agents' balances and any related ACL are recorded in the period in which the balance is deemed uncollectible. Refer to Note 7 - Premiums Receivable and Agents' Balances for further discussion regarding the allowance for doubtful accounts included in premiums receivable and agents’ balances. Non-Insurance Revenue from Contracts with Customers Installment fees are charged on property and casualty insurance contracts for billing the insurance customer in installments over the policy term. These fees are recognized in fee income as earned on collection. Insurance servicing revenues within Personal Insurance consist of up-front commissions earned for collecting premiums and processing claims on insurance policies for which The Hartford does not assume underwriting risk, predominantly related to the National Flood Insurance Plan program. These insurance servicing revenues are recognized in other revenues over the period of the flood program's policy terms. Employee Benefits earns fee income from employers for the administration of underwriting, implementation and claims processing for employer self-funded plans and for leave management services. Fees are recognized as services are provided and collected monthly. Hartford Funds provides investment management, administrative and distribution services to mutual funds and exchange-traded funds. The Company assesses investment advisory, distribution and other asset management fees primarily based on the average daily net asset values from mutual funds and exchange-traded funds, which are recorded in the period in which the services are provided and are collected monthly. Fluctuations in domestic and international markets and related investment performance, volume and mix of sales and redemptions of mutual funds or exchange-traded funds, and other changes to the composition of assets under management ("AUM") are all factors that ultimately have a direct effect on fee income earned. Corporate investment management and other fees are primarily for managing third party invested assets. These fees, calculated based on the average quarterly net asset values, are recorded in the period in which the services are provided and are collected quarterly. Fluctuations in markets and interest rates and other changes to the composition of assets under management are all factors that ultimately have a direct effect on fee income earned. Dividends to Policyholders Policyholder dividends are paid to certain property and casualty policyholders. Policies that receive dividends are referred to as participating policies. Participating dividends to policyholders are accrued and reported in insurance operating costs and other expenses and other liabilities using an estimate of the amount to be paid based on underlying contractual obligations under policies and applicable state laws. Net written premiums for participating property and casualty insurance policies represented 6%, 6%, and 7% of total net written premiums for each of the years ended December 31, 2024, 2023 and 2022, respectively. Participating dividends to property and casualty policyholders were $39, $39 and $29 for the years ended December 31, 2024, 2023 and 2022, respectively. There were no additional amounts of income allocated to participating policyholders. Investments Overview The Company’s investments in fixed maturities consist of bonds, including structured securities, and redeemable preferred stock. Most of these investments are classified as AFS and are carried at fair value. The after tax difference between fair value and cost or amortized cost is reflected in stockholders’ equity as a component of AOCI. Fixed maturities for which the Company elected the fair value option are classified as FVO and are carried at fair value with changes in value recorded in net realized gains and losses. These investments represent certain investments in residual interests of securitizations and other securities that contain embedded credit derivatives. Equity securities are measured at fair value with any changes in valuation reported in net realized gains and losses. Mortgage loans are recorded at the outstanding principal balance adjusted for amortization of premiums or discounts and net of an ACL. Short-term investments are carried at amortized cost, which approximates fair value. Limited partnerships and other alternative investments are reported at their carrying value and are primarily accounted for under the equity method with the Company’s share of earnings included in net investment income. Recognition of income related to limited partnerships and other alternative investments is delayed due to the availability of the related financial information, as private equity and other funds are generally received on a three-month delay. Accordingly, income for the years ended December 31, 2024, 2023, and 2022 may not include the full impact of current year changes in valuation of the underlying assets and liabilities of the funds, which are generally obtained from the limited partnerships. Other investments primarily consist of equity fund investments measured at fair value, overseas deposits which are measured at fair value using the net asset value as a practical expedient, consolidated investment funds for which the Company has provided seed money and reports the underlying investments at fair value with changes in the fair value recognized in income consistent with accounting requirements for investment companies, and derivative instruments which are carried at fair value. Net Realized Gains and Losses Net realized gains and losses from investment sales are reported as a component of revenues and are determined on a specific identification basis. Net realized gains and losses also result from fair value changes in equity securities, FVO securities, and derivatives contracts that do not qualify, or are not designated, as a hedge for accounting purposes. The Company records net credit losses on fixed maturities, AFS and changes in the ACL on mortgage loans as a component of net realized gains and losses. Future changes in the ACL resulting from improvements in expected future cash flows are recorded through net realized gains and losses. Net Investment Income Interest income from fixed maturities and mortgage loans is recognized when earned on the constant effective yield method based on the estimated timing of cash flows. Most premiums and discounts on fixed maturities are amortized to the maturity date. Premiums on callable bonds may be amortized to call dates based on call prices. For structured financial assets subject to prepayment risk, yields are recalculated and adjusted periodically to reflect historical and/or estimated future prepayments using the retrospective method. For certain other structured securities, including securities that previously had an ACL and interest only securities, any yield adjustments are made using the prospective method. Prepayment fees and make-whole payments on fixed maturities and mortgage loans are recorded in net investment income when earned. For equity securities, dividends are recognized as investment income on the ex-dividend date. Limited partnerships and other alternative investments primarily use the equity method of accounting to recognize the Company’s share of earnings. For fixed maturities with an ACL, net investment income is recognized at the original effective rate and accretion of the ACL is recognized through net realized gains and losses. The Company’s non-income producing investments were not material for the years ended December 31, 2024, 2023 and 2022. Accrued Investment Income Accrued investment income primarily includes accruals of interest and dividend income from investments that have been earned but not yet received. Derivative Instruments Overview The Company utilizes a variety of over-the-counter ("OTC") derivatives, derivatives cleared through central clearing houses ("OTC-cleared") and exchange traded derivative instruments as part of its overall risk management strategy as well as to engage in income generation covered call transactions and replication transactions. The types of instruments may include swaps, caps, floors, forwards, futures and options to achieve the following Company-approved objectives: • to hedge risk arising from interest rate, equity market, commodity market, credit spread and issuer default, price or currency exchange rates or volatility; • to manage liquidity; • to control transaction costs; and • to enter into income generation covered call transactions and synthetic replication transactions. Interest rate and credit default swaps involve the periodic exchange of cash flows with other parties, at specified intervals, calculated using agreed upon rates or other financial variables and notional principal amounts. Generally, little to no cash or principal payments are exchanged at the inception of the contract. Typically, at the time a swap is entered into, the cash flow streams exchanged by the counterparties are equal in value. The Company clears certain interest rate swap and credit default swap derivative transactions through central clearing houses. OTC-cleared derivatives require initial collateral at the inception of the trade in the form of cash or highly liquid securities, such as U.S. Treasuries and government agency investments. Central clearing houses also require additional cash as variation margin based on daily market value movements. For information on collateral, see the Derivative Collateral Arrangements section in Note 6 - Derivatives. In addition, OTC-cleared transactions include price alignment amounts either received or paid on the variation margin, which is characterized as interest and reflected in net investment income. Forward contracts are customized commitments that specify a rate of interest or currency exchange rate to be paid or received on an obligation beginning on a future start date and are typically settled in cash. Financial futures are standardized commitments to either purchase or sell designated financial instruments, at a future date, for a specified price and may be settled in cash or through delivery of the underlying instrument. Futures contracts trade on organized exchanges. Margin requirements for futures are met by pledging securities or cash, and changes in the futures’ contract values are settled daily in cash. Option contracts grant the purchaser, for a premium payment, the right to either purchase from or sell to the issuer a financial instrument at a specified price, within a specified period or on a stated date. The contracts may reference commodities, which grant the purchaser the right to either purchase from or sell to the issuer commodities at a specified price, within a specified period or on a stated date. Option contracts are typically settled in cash. Foreign currency swaps exchange an initial principal amount in two currencies, agreeing to re-exchange the currencies at a future date, at an agreed upon exchange rate. There may also be a periodic exchange of payments at specified intervals calculated using the agreed upon rates and exchanged principal amounts. The Company’s derivative transactions conducted in insurance company subsidiaries are used in strategies permitted under the derivative use plans required by the State of Connecticut, the State of Illinois and the State of New York insurance regulators. Accounting and Financial Statement Presentation of Derivative Instruments and Hedging Activities Derivative instruments are recognized on the Consolidated Balance Sheets at fair value and are reported in Other Investments and Other Liabilities On the date the derivative contract is entered into, the Company designates the derivative as (1) a hedge of the fair value of a recognized asset or liability (“fair value” hedge), (2) a hedge of the variability in cash flows of a forecasted transaction or of amounts to be received or paid related to a recognized asset or liability (“cash flow” hedge), (3) a hedge of a net investment in a foreign operation (“net investment” hedge) or (4) held for other investment and/or risk management purposes, which primarily involve managing asset or liability related risks and do not qualify for hedge accounting. The Company currently does not designate any derivatives as fair value or net investment hedges. Cash Flow Hedges - Changes in the fair value of a derivative that is designated and qualifies as a cash flow hedge, including foreign-currency cash flow hedges, are recorded in AOCI and are reclassified into earnings when the variability of the cash flow of the hedged item impacts earnings. Gains and losses on derivative contracts that are reclassified from AOCI to current period earnings are included in the line item in the Consolidated Statements of Operations in which the cash flows of the hedged item are recorded. Periodic derivative net coupon settlements are recorded in the line item of the Consolidated Statements of Operations in which the cash flows of the hedged item are recorded. Cash flows from cash flow hedges are presented in the same category as the cash flows from the items being hedged in the Consolidated Statement of Cash Flows. Other Investment and/or Risk Management Activities - The Company’s other investment and/or risk management activities primarily relate to strategies used to reduce economic risk or replicate permitted investments and do not receive hedge accounting treatment. Changes in the fair value, including periodic derivative net coupon settlements, of derivative instruments held for other investment and/or risk management purposes are reported in current period earnings as net realized gains and losses. Hedge Documentation and Effectiveness Testing To qualify for hedge accounting treatment, a derivative must be highly effective in mitigating the designated changes in fair value or cash flows of the hedged item. At hedge inception, the Company formally documents all relationships between hedging instruments and hedged items, as well as its risk-management objective and strategy for undertaking each hedge transaction. The documentation process includes linking derivatives that are designated as fair value, cash flow, or net investment hedges to specific assets or liabilities on the balance sheet or to specific forecasted transactions and defining the effectiveness testing methods to be used. The Company also formally assesses both at the hedge’s inception and ongoing on a quarterly basis, whether the derivatives that are used in hedging transactions have been and are expected to continue to be highly effective in offsetting changes in fair values, cash flows or net investment in foreign operations of hedged items. Hedge effectiveness is assessed primarily using quantitative methods as well as using qualitative methods. Quantitative methods include regression or other statistical analysis of changes in fair value or cash flows associated with the hedge relationship. Qualitative methods may include comparison of critical terms of the derivative to the hedged item. Discontinuance of Hedge Accounting The Company discontinues hedge accounting prospectively when (1) it is determined that the qualifying criteria are no longer met; (2) the derivative is no longer designated as a hedging instrument; or (3) the derivative expires or is sold, terminated or exercised. When cash flow hedge accounting is discontinued because the Company becomes aware that it is not probable that the forecasted transaction will occur, the derivative continues to be carried on the balance sheet at its fair value, and gains and losses that were accumulated in AOCI are recognized immediately in earnings. In other situations in which hedge accounting is discontinued, including those where the derivative is sold, terminated or exercised, amounts previously deferred in AOCI are reclassified into earnings when earnings are impacted by the hedged item. Embedded Derivatives The Company may purchase investments that contain embedded derivative instruments. When it is determined that (1) the embedded derivative possesses economic characteristics that are not clearly and closely related to the economic characteristics of the host contract and (2) a separate instrument with the same terms would qualify as a derivative instrument, the embedded derivative is bifurcated from the host for measurement purposes. The embedded derivative, which is reported with the host instrument in the Consolidated Balance Sheets, is carried at fair value with changes in fair value reported in net realized gains and losses. Credit Risk of Derivative Instruments Credit risk is defined as the risk of financial loss due to uncertainty of an obligor’s or counterparty’s ability or willingness to meet its obligations in accordance with agreed upon terms. Credit exposures are measured using the market value of the derivatives, resulting in amounts owed to the Company by its counterparties or potential payment obligations from the Company to its counterparties. The Company generally requires that OTC derivative contracts, other than certain forward contracts, be governed by International Swaps and Derivatives Association agreements which are structured by legal entity and by counterparty, and permit right of offset. Some agreements require daily collateral settlement based upon agreed upon thresholds. For purposes of daily derivative collateral maintenance, credit exposures are generally quantified based on the prior business day’s market value and collateral is pledged to and held by, or on behalf of, the Company to the extent the current value of the derivatives is greater than zero, subject to minimum transfer thresholds, if applicable. The Co mpany also minimizes the credit risk of derivative instruments by entering into transactions with high quality counterparties primarily rated A or better, which are monitored and evaluated by the Company’s risk management team and reviewed by senior management. OTC-cleared derivatives are governed by clearing house rules. Transactions cleared through a central clearing house reduce risk due to their ability to require daily variation margin and act as an independent valuation source. In addition, the Company monitors counterparty credit exposure on a monthly basis to ensure compliance with Company policies and statutory limitations. Cash and Restricted Cash Cash represents cash on hand and demand deposits with banks or other financial institutions. Restrictions on cash primarily relate to funds that are held to support regulatory and contractual obligations. Reinsurance The Company cedes insurance to other insurers in order to limit its maximum losses, to diversify its exposures and provide statutory surplus relief. Such arrangements do not relieve the Company of its primary liability to policyholders. Failure of reinsurers to honor their obligations could result in losses to the Company. The Company also assumes reinsurance from other insurers and is a member of and participates in reinsurance pools and associations. Assumed reinsurance refers to the Company’s acceptance of certain insurance risks that other insurance companies or pools have underwritten. Reinsurance accounting is followed for ceded and assumed transactions that provide indemnification against loss or liability relating to insurance risk (i.e., risk transfer). To meet risk transfer requirements, a reinsurance agreement must include insurance risk, consisting of underwriting and timing risk, and a reasonable possibility of a significant loss to the reinsurer. If the ceded and assumed transactions do not meet risk transfer requirements, the Company accounts for these transactions as deposit transactions. The Company had no deposit liability as of December 31, 2024 or and 2023 reported in other liabilities. Premiums, benefits, losses and loss adjustment expenses reflect the net effects of ceded and assumed reinsurance transactions. Included in other assets are prepaid reinsurance premiums, which represent the portion of premiums ceded to reinsurers applicable to the unexpired terms of the reinsurance contracts. Reinsurance recoverables are balances due from reinsurers for ceded paid and unpaid losses and loss adjustment expenses and are presented net of an allowance for uncollectible reinsurance. Changes in the allowance for uncollectible reinsurance are reported in benefits, losses and loss adjustment expenses in the Company's Consolidated Statements of Operations. The Company periodically evaluates the recoverability of its reinsurance recoverable assets and establishes an allowance for uncollectible reinsurance. The allowance for uncollectible reinsurance reflects management’s best estimate of reinsurance cessions that may be uncollectible in the future due to reinsurers’ unwillingness or inability to pay. The allowance for uncollectible reinsurance comprises an ACL and an allowance for disputed balances. Based on this analysis, the Company may adjust the allowance for uncollectible reinsurance or charge off reinsurer balances that are determined to be uncollectible. The Company records credit losses related to reinsurance recoverables in benefits, losses and loss adjustment expenses. Write-offs of reinsurance recoverables and any related ACL are recorded in the period in which the balance is deemed uncollectible. Expected recoveries are included in the estimate of the ACL. Retroactive reinsurance agreements, including adverse development covers ("ADC"), are reinsurance agreements under which our reinsurer agrees to reimburse us as a result of loss development related to past insurable events. For these agreements, the consideration paid in excess of the estimated ultimate losses to be recovered under the agreement at inception is recognized as a loss on reinsurance transaction. The benefit of subsequent adverse development ceded up to the total consideration paid is recognized as ceded losses, which are a reduction of incurred losses and loss adjustment expenses. The excess of the estimated amounts ultimately to be recovered under the agreement over the consideration paid is recognized as a deferred gain liability and amortized into income over the period the ceded losses are recovered in cash from the reinsurer. The amount of the deferred gain liability is recalculated each period based on cumulative recoveries not yet collected relative to the latest estimate of ultimate losses to be recovered. Ceded loss reserves under retroactive agreements were $1.6 billion and $1.7 billion, and the deferred gain liability reported in other liabilities was $914 and $997, as of December 31, 2024 and 2023, respectively. In any given period, the change in deferred gain included in net income includes amortization of the deferred gain based on the percentage of ultimate ceded losses collected plus any change in the deferred gain liability due to changes in the estimated ultimate losses to be recovered. The effect on income from change in the deferred gain was a net charge or (benefit) to earnings of $(83), $194 and $229 before tax for the years ended December 31, 2024, 2023, and 2022 respectively. Deferred Policy Acquisition Costs DAC represents costs that are directly related to the acquisition of new and renewal insurance contracts and incremental direct costs of contract acquisition that are incurred in transactions with independent third parties or in compensation to employees. Such costs primarily include commissions, premium taxes, costs and certain other expenses that are directly related to successfully issued contracts, including a portion of policy issuance and underwriting costs. For P&C insurance products and group life, disability and accident contracts, costs are deferred and amortized ratably over the period the related premiums are earned. Deferred acquisition costs are reviewed to determine if they are recoverable from future income, and if not, are charged to expense. Anticipated investment income is considered in the determination of the recoverability of DAC. Income Taxes The Company recognizes taxes payable or refundable for the current year and deferred taxes for the tax consequences of temporary differences between the financial reporting and tax basis of assets and liabilities. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years the temporary differences are expected to reverse. A deferred tax provision is recorded for the tax effects of temporary differences between the Company's current taxable income and its income before tax under generally accepted accounting principles in the Consolidated Statements of Operations. For deferred tax assets, the Company records a valuation allowance that is adequate to reduce the total deferred tax asset to an amount that will more likely than not be realized. Goodwill Goodwill represents the excess of the cost to acquire a business over the acquisition date fair value of net assets acquired. Goodwill is not amortized but is reviewed for impairment at least annually or more frequently if events occur or circumstances change that would indicate that a triggering event for a potential impairment has occurred. Goodwill is tested for impairment by comparing the fair value of a reporting unit to its carrying value. Goodwill is impaired up to the amount that the carrying value of the reporting unit exceeds the fair value. A reporting unit is defined as an operating segment or one level below an operating segment. The Company’s reporting units, for which goodwill has been allocated consist of Business Insurance, Personal Insurance, Employee Benefits, and Hartford Funds. Management’s determination of the fair value of each reporting unit incorporates multiple inputs into discounted cash flow calculations, including assumptions that market participants would make in valuing the reporting unit. Assumptions include levels of economic capital required to support the business, future business growth, earnings projections, the weighted average cost of capital used for purposes of discounting and, for the Hartford Funds segment, assets under management. Decreases in business growth, decreases in earnings projections and increases in the weighted average cost of capital will all cause a reporting unit’s fair value to decrease, increasing the possibility of impairments. Intangible Assets Acquired intangible assets on the Consolidated Balance Sheets include purchased customer relationship and agency or other distribution rights and licenses measured at fair value at acquisition. The Company amortizes finite-lived other intangible assets over their useful lives generally on a straight-line basis over the period of expected benefit, ranging from 1 to 15 years. Management revises amortization periods if it believes there has been a change in the length of time that an intangible asset will continue to have value. Indefinite-lived intangible assets are not subject to amortization. Intangible assets are assessed for impairment generally when events or circumstances indicate a potential impairment and at least annually for indefinite-lived intangibles. Finite-lived intangible assets are impaired if the carrying amount is not recoverable from undiscounted cash flows. Indefinite-lived intangible assets are impaired if the carrying amount exceeds fair value. Impaired intangible assets are written down to fair value. Property and Equipment Property and equipment, which includes capitalized software and right-of-use lease assets, is carried at cost net of accumulated depreciation. Depreciation is based on the estimated useful lives of the various classes of property and equipment and is recognized principally on the straight-line method. Accumulated depreciation was $2.5 billion and $2.4 billion as of December 31, 2024 and 2023, respectively. Depreciation expense was $177, $204, and $213 for the years ended December 31, 2024, 2023 and 2022, respectively, and is reported in insurance operating costs and other expenses. The costs to access and develop hosted software arrangements, where The Hartford has the right to access and use the software, but not take possession, an
Commitments and Contingencies Disclosure [Text Block]	14. COMMITMENTS AND CONTINGENCIES Management evaluates each contingent matter separately. A loss is recorded if probable and reasonably estimable. Management establishes liabilities for these contingencies at its “best estimate,” or, if no one number within the range of possible losses is more probable than any other, the Company records an estimated liability at the low end of the range of losses. The Hartford is involved in claims litigation arising in the ordinary course of business, both as a liability insurer defending or providing indemnity for third-party claims brought against insureds and as an insurer defending coverage claims brought against it. The Hartford accounts for such activity through the establishment of unpaid loss and loss adjustment expense reserves. Subject to the uncertainties related to sexual molestation and sexual abuse claims, including those discussed in Note 10, Reserve for Unpaid Losses and Loss Adjustment Expenses, and in the following discussion under the caption “Run-off Asbestos and Environmental Claims,” management expects that the ultimate liability, if any, with respect to such ordinary-course claims litigation, after consideration of provisions made for potential losses and costs of defense, will not be material to the consolidated financial condition, results of operations or cash flows of The Hartford. The Hartford is also involved in other kinds of legal actions, some of which assert claims for substantial amounts. In addition to the matter described below, these actions include putative class actions seeking certification of a state or national class. Such putative class actions have alleged, for example, underpayment of claims or improper sales or underwriting practices in connection with various kinds of insurance policies, such as personal and commercial automobile and property. The Hartford also is involved in individual actions in which punitive damages are sought, such as claims alleging bad faith in the handling of insurance claims or other allegedly unfair or improper business practices. Management expects that the ultimate liability, if any, with respect to such lawsuits, after consideration of provisions made for estimated losses, will not be material to the consolidated financial condition of The Hartford. Nonetheless, given the large or indeterminate amounts sought in certain of these actions, and the inherent unpredictability of litigation, the outcome in certain matters could, from time to time, have a material adverse effect on the Company’s results of operations or cash flows in particular quarterly or annual periods. Run-off Asbestos and Environmental Claims The Company continues to receive A&E claims. Asbestos claims relate primarily to bodily injuries asserted by people who came in contact with asbestos or products containing asbestos. Environmental claims relate primarily to pollution and related clean-up costs. The vast majority of the Company's exposure to A&E relates to accident years prior to 1986 that are reported in Property & Casualty Other Operations ("Run-off A&E"). In addition, since 1986, the Company has written asbestos and environmental exposures under general liability policies and pollution liability under homeowners policies, which are reported in the Business Insurance and Personal Insurance segments, respectively. Prior to 1986, the Company wrote several different categories of insurance contracts that may cover A&E claims. First, the Company wrote primary policies providing the first layer of coverage in an insured’s liability program. Second, the Company wrote excess and umbrella policies providing higher layers of coverage for losses that exhaust the limits of underlying coverage. Third, the Company acted as a reinsurer assuming a portion of those risks assumed by other insurers writing primary, excess, umbrella and reinsurance coverages. Significant uncertainty limits the ability of insurers and reinsurers to estimate the ultimate reserves necessary for unpaid gross losses and expenses related to environmental and asbestos claims. The degree of variability of gross reserve estimates for these exposures is significantly greater than for other more traditional exposures. In the case of the reserves for asbestos exposures, factors contributing to the high degree of uncertainty include inadequate loss development patterns, plaintiffs’ expanding theories of liability, the risks inherent in major litigation, and inconsistent and emerging legal doctrines with respect to the underlying claims and with respect to the Company's coverage obligations. Furthermore, over time, insurers, including the Company, have experienced significant changes in the rate at which asbestos claims are brought, the claims experience of particular insureds, and the value of claims, making predictions of future exposure from past experience uncertain. Plaintiffs and insureds also have sought to use bankruptcy proceedings, including “pre-packaged” bankruptcies, to accelerate and increase loss payments by insurers. In addition, some policyholders have asserted new classes of claims for coverages to which an aggregate limit of liability may not apply. Further uncertainties include insolvencies of other carriers, insolvencies of insureds and unanticipated developments pertaining to the Company’s ability to recover reinsurance for A&E claims. Management believes these issues are not likely to be resolved in the near future. In the case of the reserves for environmental exposures, factors contributing to the high degree of uncertainty include expanding theories of liability and damages against insureds, emerging risks from products and substances alleged to cause damage, such as per-and polyfluoroalkyl substances ("PFAS"), the risks inherent in major litigation, inconsistent and emerging legal doctrines concerning the existence and scope of coverage for environmental claims, and the scope and level of complexity of the remediation required by regulators. The reporting pattern for assumed reinsurance claims, including those related to A&E claims, is much longer than for direct claims. In many instances, it takes months or years to determine that the policyholder’s own obligations have been met and how the reinsurance in question may apply to such claims. The delay in reporting reinsurance claims and exposures adds to the uncertainty of estimating the related reserves. It is also not possible to predict changes in the legal and legislative environment and their effect on the future development of A&E claims. Given the factors described above, the Company believes the actuarial tools and other techniques it employs to estimate the ultimate cost of claims for more traditional kinds of insurance exposure are less precise in estimating reserves for A&E exposures. For this reason, the Company principally relies on exposure-based analysis to estimate the ultimate costs of these claims, both gross and net of reinsurance, and regularly evaluates new account information in assessing its potential A&E exposures. The Company supplements this exposure-based analysis with evaluations of the Company’s historical direct net loss and expense paid and reported experience, and net loss and expense paid and reported experience by calendar and/or report year, to assess any emerging trends, fluctuations or characteristics suggested by the aggregate paid and reported activity. For its Run-off A&E claims, a s of December 31, 2024, the Company reported $224 of net asbestos and environmental reserves, including the benefit of losses ceded to the A&E ADC with NICO. In addition, the Company has recorded $850, including $62 in 2024, of a deferred gain within other liabilities for losses economically ceded to NICO but for which the benefit is not recognized in earnings until later periods. While the Company believes that its current Run-off A&E reserves are appropriate, significant uncertainties limit our ability to estimate the ultimate reserves necessary for unpaid losses and related expenses. The ultimate liabilities, thus, could exceed the currently recorded reserves, and any such additional liability, while not reasonably estimable now, could be material to The Hartford's consolidated operating results or liquidity. Unfunded Commitments As of December 31, 2024, the Company has outstanding commitments totaling $3.8 billion, of which $2.1 billion is committed to fund limited partnerships and other alternative investments, which may be called by the partnership during the commitment period to fund the purchase of new investments and partnership expenses. The funding of purchase investments in limited partnerships and other alternative investments are at the discretion of the general partner or manager and may be called at any time. Additionally, $1.0 billion of the outstanding commitments relate to various funding obligations associated with private debt and equity securities, as well as tax credits. The remaining outstanding commitments of $636 relate to mortgage loans. Of the $3.8 billion in total outstanding commitments, $53 are related to mortgage loan commitments which the Company can cancel unconditionally. Guaranty Funds and Other Insurance-related Assessments In all states, insurers licensed to transact certain classes of insurance are required to become members of a guaranty fund. In most states, in the event of the insolvency of an insurer writing any such class of insurance in the state, a guaranty fund may assess its members to pay covered claims of the insolvent insurers. Assessments are based on each member's proportionate share of written premiums in the state for the classes of insurance in which the insolvent insurer was engaged. Assessments are generally limited for any year to one or two percent of the premiums written per year depending on the state. Some states permit member insurers to recover assessments paid through surcharges on policyholders or through full or partial premium tax offsets, while other states permit recovery of assessments through the rate filing process. Liabilities for guaranty fund and other insurance-related assessments are accrued when an assessment is probable, when it can be reasonably estimated, and when the event obligating the Company to pay an imposed or probable assessment has occurred. Liabilities for guaranty funds and other insurance-related assessments are not discounted and are included as part of other liabilities in the Consolidated Balance Sheets. As of December 31, 2024 and 2023 the liability balance was $70 and $77, respectively. As of December 31, 2024 and 2023, there were $0 of premium tax offsets related to guaranty fund or other insurance-related assessments for both periods. Derivative Commitments Certain of the Company’s derivative agreements contain provisions that are tied to the financial strength ratings, as set by nationally recognized statistical agencies, of the individual legal entity that entered into the derivative agreement. If the legal entity’s financial strength were to fall below certain ratings, the counterparties to the derivative agreements could, in certain instances, terminate the agreements and demand immediate settlement of all outstanding derivative positions traded under each impacted bilateral agreement. The settlement amount is determined by netting the derivative positions transacted under each agreement. If the termination rights were to be exercised by the counterparties, it could impact the legal entity’s ability to conduct hedging activities by increasing the associated costs and decreasing the willingness of counterparties to transact with the legal entity. The aggregate fair value of all derivative instruments with credit-risk-related contingent features that are in a net liability position as of December 31, 2024 was $33 for which the legal entities have posted collateral of $31 in the normal course of business. Based on derivative contractual terms as of December 31, 2024, a downgrade of the current financial strength ratings by either Moody's or S&P would not require additional assets to be posted as collateral. This requirement could change as a result of changes in our hedging activities or to the extent changes in contractual terms are negotiated. The nature of the additional collateral that we would post, if required, would be primarily in the form of U.S. Treasury bills, U.S. Treasury notes and government agency securities. Guarantees In the ordinary course of selling businesses or entities to third parties, the Company has agreed to indemnify purchasers for losses arising subsequent to the closing due to breaches of representations and warranties with respect to the business or entity being sold or with respect to covenants and obligations of the Company and/or its subsidiaries. These obligations are typically subject to various time limitations, defined by the contract or by operation of law, such as statutes of limitation. In some cases, the maximum potential obligation is subject to contractual limitations, while in other cases such limitations are not specified or applicable. The Company does not expect to make any material payments on these guarantees and is not carrying any material liabilities associated with these guarantees. The Hartford has guaranteed the timely payment of contractual claims under certain life, accident and health and annuity contracts issued by its former life and annuity business with most of the guaranteed contracts issued between 1990 and 1997 (the "Talcott Guarantees"). Upon the sale of the life and annuity business in May 2018, the purchaser indemnified the Company for any liability arising under the guarantees. The Talcott Guarantees cover contractual obligations only but otherwise have no limitation as to maximum potential future payments. The liability for credit losses ("LCL") for Talcott Guarantees is calculated for the estimated amount payable under guaranteed contracts multiplied by the probability of default and the amount of loss given a default. The probability of default is assigned by credit rating of the applicable insurance company that issued the contract and is based on historical insurance industry defaults for liabilities with similar durations estimated through multiple economic cycles. Credit ratings are current and forward-looking and consider a variety of economic outcomes. Because annuities represent the majority of the contracts issued, the loss given default factors are based on a historical study of annuity policyholder recoveries from insolvent estate assets. The Company's exposure is expected to run off over a period that will include more than one economic cycle. The Company's evaluation of the required LCL for the Talcott Guarantees considers the current economic environment as well as macroeconomic scenarios similar to the approach used to estimate the ACL for mortgage loans. See Note 5 - Investments. In 2022, the LCL decreased from $25 to $22 primarily reflecting a decrease in the estimated amount payable under guaranteed contracts. In 2023, the LCL decreased to $9 primarily due to an upgrade of Talcott's credit rating, as well as a decrease in the estimated amount payable under guaranteed contracts. During 2024, the LCL decreased to $7 primarily due to an improvement of Talcott's assumed liquidation rate, as well as a decrease in the estimated amount payable under guaranteed contracts. The Company has never experienced a loss on financial guarantees similar to the Talcott Guarantees and we believe the risk of loss is remote.

Earnings Per Common Share

Earnings Per Common Share	12 Months Ended
	Dec. 31, 2024
Earnings Per Share [Abstract]
Earnings Per Common Share	2. EARNINGS PER COMMON SHARE Computation of Basic and Diluted Earnings per Common Share For the years ended December 31, (In millions, except for per share data) 2024 2023 2022 Earnings Net income $ 3,111 $ 2,504 $ 1,819 Less: Preferred stock dividends 21 21 21 Net income available to common stockholders $ 3,090 $ 2,483 $ 1,798 Shares Weighted average common shares outstanding, basic 293.9 307.1 324.8 Dilutive effect of stock-based awards under compensation plans 4.7 4.4 4.7 Weighted average common shares outstanding and dilutive potential common shares [1] 298.6 311.5 329.5 Net income available to common stockholders per common share Basic $ 10.51 $ 8.09 $ 5.54 Diluted $ 10.35 $ 7.97 $ 5.46 [1] For additional information, see Note 15 - Equity and Note 19 - Stock Compensation Plans. Basic earnings per common share is computed based on the weighted average number of common shares outstanding during the year. Diluted earnings per common share includes the dilutive effect of stock-based awards under compensation plans. Under the treasury stock method, for stock-based awards, shares are assumed to be issued and then reduced for the number of shares repurchasable with theoretical proceeds at the average market price for the period. Contingently issuable shares are included for the number of shares issuable assuming the end of the reporting period was the end of the contingency period, if dilutive.

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2024
Segment Reporting [Abstract]
Segment Information	3. SEGMENT INFORMATION The Company currently conducts business principally in five reportable segments including Business Insurance, Personal Insurance, Property & Casualty Other Operations, Employee Benefits and Hartford Funds, as well as a Corporate category. The reportable segments are described below and align with the Company’s key product and service offerings. Over 95% of the Company’s revenues are generated in the United States (“U.S.”). The remaining revenues are generated in the U.K. and other international locations. We report our results of operations consistent with the manner in which our CODM reviews the busin ess, assesses performance, and makes operating decisions on the allocation of resources to each reportable segment. The CODM considers actual results and budget-to-actual variances when assessing segment performance and making decisions on the allocation of resources to each segment. The Company’s CODM is the Chairman and Chief Executive Officer. The accounting policies of the segments are the same as those described in Note 1 - Basis of Presentation and Significant Accounting Policies of the Notes to Consolidated Financial Statements. The Company has identified GAAP net income as the reported measure of segment profit or loss. The Company’s reportable segments, as well as the Corporate category, are as follows: Business Insurance Business Insurance provides a variety of insurance products and risk management services in the U.S. and internationally to commercial enterprises of varying sizes, with insurance coverages including workers’ compensation, property, automobile, general liability, umbrella, package business, professional liability, bond, marine, livestock, accident and health, and assumed reinsurance. Personal Insurance Personal Insurance provides standard automobile, homeowners and personal umbrella coverages to individuals across the U.S., including a special program designed exclusively for members of AARP through an agreement that is in place through December 31, 2032. Property & Casualty Other Operations P&C Other Operations includes certain property and casualty operations, managed by the Company, that have discontinued writing new business and includes substantially all of the Company’s asbestos and environmental ("A&E") exposures. Employee Benefits Employee Benefits provides employers and associations with group life, accident and disability coverage, along with other products and services, including voluntary benefits, and group retiree health. Hartford Funds Hartford Funds offers investment products for retail and retirement accounts and provides investment management, distribution and administrative services such as product design, implementation and oversight. This business also manages a portion of the mutual funds which support third-party life and annuity separate accounts. Corporate The Company includes in the Corporate category capital raising activities (including equity financing, debt financing and related interest expense), purchase accounting adjustments related to goodwill, reserves for run-off structured settlement and terminal funding agreement liabilities, restructuring costs, transaction expenses incurred in connection with an acquisition, certain M&A costs, and other expenses not allocated to the reportable segments. Interest expense of $199, $199 and $213, on debt for the years ended December 31, 2024, 2023 and 2022, respectively, is included in the Corporate category. Corporate also includes investment management fees and expenses related to managing third party assets. Financial Measures and Other Segment Information Certain transactions between segments occur during the year that primarily relate to tax settlements, insurance coverage, expense reimbursements, services provided, investment transfers and capital contributions. In addition, certain inter-segment transactions occur that relate to interest income on allocated surplus. Consolidated net income is unaffected by such transactions. Segment Revenues For the years ended December 31, 2024 2023 2022 Business Insurance Workers’ compensation $ 3,691 $ 3,670 $ 3,499 General liability 2,218 1,977 1,836 Marine 278 256 235 Package business 2,331 2,076 1,844 Commercial property 1,258 1,053 845 Professional Liability 824 787 737 Bond 327 321 303 Assumed reinsurance 758 615 467 Commercial automobile 1,079 927 844 Business Insurance earned premium and fee income 12,764 11,682 10,610 Net investment income 1,714 1,532 1,415 Net realized losses (73) (156) (385) Other revenue [1] 1 1 (1) Total Business Insurance 14,406 13,059 11,639 Personal Insurance Personal automobile 2,425 2,156 2,047 Homeowners 1,061 961 932 Personal Insurance earned premium and fee income [2] 3,486 3,117 2,979 Net investment income 222 171 140 Net realized losses (14) (16) (35) Other revenue 85 81 73 Total Personal Insurance 3,779 3,353 3,157 P&C Other Operations Net investment income 74 69 63 Net realized losses (4) (7) (16) Total P&C Other Operations 70 62 47 Employee Benefits Group disability 3,576 3,530 3,310 Group life 2,617 2,583 2,393 Other 422 402 354 Employee Benefits premium and other considerations 6,615 6,515 6,057 Net investment income 475 469 524 Net realized losses (24) (45) (122) Total Employee Benefits 7,066 6,939 6,459 Hartford Funds Mutual fund and ETF 960 900 964 Third-party life and annuity separate accounts [3] 75 73 80 Hartford Funds fee income 1,035 973 1,044 Net investment income 20 17 9 Net realized gains (losses) 12 10 (24) Total Hartford Funds 1,067 1,000 1,029 Total segment revenues $ 26,388 $ 24,413 $ 22,331 [1] Other revenues for Business Insurance includes revenues from equity method investments that are not considered revenues from contracts with customers in the table below. [2] For 2024, 2023 and 2022, AARP members accounted for earned premiums of $3.2 billion, $2.9 billion and $2.7 billion, respectively. [3] Represents revenues earned for investment advisory services on third party life and annuity separate account AUM by the Company's Hartford Funds segment. Significant Segment Expenses For the years ended December 31, 2024 2023 2022 Business Insurance Current accident year losses and loss adjustment expenses ("LAE") before catastrophes $ 7,186 $ 6,575 $ 5,959 Current accident year catastrophe losses and LAE 486 436 441 Prior accident year development of losses and LAE (231) (225) (231) Amortization of DAC 1,993 1,779 1,563 Insurance operating costs 1,973 1,837 1,788 Amortization of other intangible assets 29 29 29 Dividends to policyholders 39 39 29 Total Business Insurance 11,475 10,470 9,578 Personal Insurance Current accident year losses and LAE before catastrophes 2,351 2,287 1,969 Current accident year catastrophe losses and LAE 282 240 208 Prior accident year development of losses and LAE (108) 11 (13) Amortization of DAC 255 231 228 Insurance operating costs 673 576 594 Amortization of other intangible assets 2 2 2 Total Personal Insurance 3,455 3,347 2,988 P&C Other Operations Prior accident year development of losses and LAE 219 224 280 Insurance operating costs 9 4 9 Total P&C Other Operations 228 228 289 Employee Benefits Group disability losses 2,432 2,370 2,263 Group life losses 2,060 2,157 2,091 Group losses - other 189 156 163 Amortization of DAC 34 34 33 Insurance operating costs and other expenses 1,609 1,514 1,467 Amortization of other intangible assets 40 40 40 Total Employee Benefits 6,364 6,271 6,057 Hartford Funds Sub-advisory expense 289 265 282 Employee compensation and benefits 131 121 123 Distribution and service 299 289 315 General, administrative and other 105 106 106 Total Hartford Funds 824 781 826 Total significant segment expenses $ 22,346 $ 21,097 $ 19,738 Segment/Category Summary For the Year Ended December 31, 2024 Reportable Segments Business Insurance Personal Insurance P&C Other Operations Employee Benefits Hartford Funds Total Reportable Segments Corporate Consolidated Earned premium and fee income from external customers $ 12,764 $ 3,486 $ — $ 6,615 $ 1,035 $ 23,900 $ 40 $ 23,940 Net investment income 1,714 222 74 475 20 2,505 63 2,568 Net realized gains/(losses) (73) (14) (4) (24) 12 (103) 42 (61) Other revenue [1] 1 85 — — — 86 2 88 Total Revenues 14,406 3,779 70 7,066 1,067 26,388 147 26,535 Significant segment expenses 11,475 3,455 228 6,364 824 22,346 22,346 Other segment expenses [2] 6 67 4 — — 77 77 Corporate expenses 263 263 Income tax expense/(benefit) 576 49 (35) 141 51 782 (44) 738 Net income (loss) $ 2,349 $ 208 $ (127) $ 561 $ 192 $ 3,183 $ (72) $ 3,111 Other segment disclosures: Amortization of DAC $ 1,993 $ 255 $ — $ 34 $ — $ 2,282 $ — $ 2,282 Amortization of other intangibles $ 29 $ 2 $ — $ 40 $ — $ 71 $ — $ 71 Total Assets $ 53,296 $ 6,034 $ 4,312 $ 13,502 $ 761 $ 77,905 $ 3,012 $ 80,917 Segment/Category Summary For the Year Ended December 31, 2023 Reportable Segments Business Insurance Personal Insurance P&C Other Operations Employee Benefits Hartford Funds Total Reportable Segments Corporate Consolidated Earned premium and fee income from external customers $ 11,682 $ 3,117 $ — $ 6,515 $ 973 $ 22,287 $ 39 $ 22,326 Net investment income 1,532 171 69 469 17 2,258 47 2,305 Net realized gains/(losses) (156) (16) (7) (45) 10 (214) 26 (188) Other revenue [1] 1 81 — — — 82 2 84 Total Revenues 13,059 3,353 62 6,939 1,000 24,413 114 24,527 Significant segment expenses 10,470 3,347 228 6,271 781 21,097 21,097 Other segment expenses [2] 2 60 — — — 62 62 Corporate expenses 280 280 Income tax expense/(benefit) 502 (15) (36) 133 45 629 (45) 584 Net income (loss) $ 2,085 $ (39) $ (130) $ 535 $ 174 $ 2,625 $ (121) $ 2,504 Other segment disclosures: Amortization of DAC $ 1,779 $ 231 $ — $ 34 $ — $ 2,044 $ — $ 2,044 Amortization of other intangibles $ 29 $ 2 $ — $ 40 $ — $ 71 $ — $ 71 Total Assets $ 49,711 $ 5,579 $ 4,235 $ 13,697 $ 684 $ 73,906 $ 2,874 $ 76,780 Segment/Category Summary For the Year Ended December 31, 2022 Reportable Segments Business Insurance Personal Insurance P&C Other Operations Employee Benefits Hartford Funds Total Reportable Segments Corporate Consolidated Earned premium and fee income from external customers $ 10,610 $ 2,979 $ — $ 6,057 $ 1,044 $ 20,690 $ 49 $ 20,739 Net investment income 1,415 140 63 524 9 2,151 26 2,177 Net realized losses (385) (35) (16) (122) (24) (582) (45) (627) Other revenue/(loss) [1] (1) 73 — — — 72 1 73 Total Revenues 11,639 3,157 47 6,459 1,029 22,331 31 22,362 Significant segment expenses 9,578 2,988 289 6,057 826 19,738 19,738 Other segment expenses [2] 11 56 — — — 67 67 Corporate expenses 295 295 Income tax expense/(benefit) 426 22 (52) 75 41 512 (69) 443 Net income (loss) $ 1,624 $ 91 $ (190) $ 327 $ 162 $ 2,014 $ (195) $ 1,819 Other segment disclosures: Amortization of DAC $ 1,563 $ 228 $ — $ 33 $ — $ 1,824 $ — $ 1,824 Amortization of other intangibles $ 29 $ 2 $ — $ 40 $ — $ 71 $ — $ 71 [1] Other revenues for Business Insurance and Corporate includes revenues from equity method investments that are not considered revenues from contracts with customers in the table below. [2] Other segment expenses primarily consists of integration costs associated with the 2019 acquisition of Navigators Group for Business Insurance and servicing expenses for Personal Insurance. Non-Insurance Revenue from Contracts with Customers For the years ended December 31, Revenue Line Item 2024 2023 2022 Business Insurance Installment billing fees Fee income $ 43 $ 41 $ 39 Personal Insurance Installment billing fees Fee income 33 30 30 Insurance servicing revenues Other revenues 85 81 73 Employee Benefits Administrative services Fee income 222 217 187 Hartford Funds Advisory, servicing and distribution fees Fee income 1,035 973 1,044 Corporate Investment management and other fees Fee income 40 39 49 Other Other revenues — 1 1 Total non-insurance revenues with customers $ 1,458 $ 1,382 $ 1,423

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2024
Fair Value Disclosures [Abstract]
Fair Value Measurements	4. FAIR VALUE MEASUREMENTS The Company carries certain financial assets and liabilities at estimated fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market in an orderly transaction between market participants. Our fair value framework includes a hierarchy that gives the highest priority to the use of quoted prices in active markets, followed by the use of market observable inputs, followed by the use of unobservable inputs. The fair value hierarchy levels are as follows: Level 1 Fair values based on unadjusted quoted prices for identical assets or liabilities, in active markets that the Company has the ability to access at the measurement date. Level 2 Fair values primarily based on observable inputs, other than quoted prices included in Level 1, or based on prices for similar assets and liabilities. Level 3 Fair values derived when one or more of the significant inputs are unobservable (including assumptions about risk). With little or no observable market, the determination of fair values uses considerable judgment and represents the Company’s best estimate of an amount that could be realized in a market exchange for the asset or liability. Also included are securities that are traded within illiquid markets and/or priced by independent brokers. The Company will classify the financial asset or liability by level based upon the lowest level input that is significant to the determination of the fair value. In most cases, both observable inputs (e.g., changes in interest rates) and unobservable inputs (e.g., changes in risk assumptions) are used to determine fair values that the Company has classified within Level 3. Assets and (Liabilities) Carried at Fair Value by Hierarchy Level as of December 31, 2024 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets accounted for at fair value on a recurring basis Fixed maturities, AFS Asset-backed securities ("ABS") $ 3,937 $ — $ 3,915 $ 22 Collateralized loan obligations ("CLOs") 3,250 — 3,134 116 Commercial mortgage-backed securities ("CMBS") 2,736 — 2,569 167 Corporate 20,636 — 18,355 2,281 Foreign government/government agencies 480 — 480 — Municipal 5,304 — 5,304 — Residential mortgage-backed securities ("RMBS") 5,230 — 5,206 24 U.S. Treasuries 994 57 937 — Total fixed maturities, AFS 42,567 57 39,900 2,610 FVO securities 308 — 111 197 Equity securities, at fair value [1] 603 372 144 87 Derivative assets Credit derivatives 30 — 30 — Equity derivatives 4 — 4 — Foreign exchange derivatives 23 — 23 — Total derivative assets [2] 57 — 57 — Short-term investments 4,068 1,271 2,699 98 Total assets accounted for at fair value on a recurring basis $ 47,603 $ 1,700 $ 42,911 $ 2,992 Liabilities accounted for at fair value on a recurring basis Derivative liabilities Credit derivatives $ (30) $ — $ (30) $ — Foreign exchange derivatives 18 — 18 — Total derivative liabilities [3] (12) — (12) — Total liabilities accounted for at fair value on a recurring basis $ (12) $ — $ (12) $ — Assets and (Liabilities) Carried at Fair Value by Hierarchy Level as of December 31, 2023 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets accounted for at fair value on a recurring basis Fixed maturities, AFS ABS $ 3,320 $ — $ 3,320 $ — CLOs 3,090 — 2,977 113 CMBS 3,125 — 2,898 227 Corporate 17,866 — 16,005 1,861 Foreign government/government agencies 562 — 562 — Municipal 6,039 — 6,039 — RMBS 4,287 — 4,251 36 U.S. Treasuries 1,529 18 1,511 — Total fixed maturities, AFS 39,818 18 37,563 2,237 FVO securities 327 — 160 167 Equity securities, at fair value [1] 864 333 473 58 Derivative assets Credit derivatives (10) — (10) — Foreign exchange derivatives 9 — 9 — Total derivative assets [2] (1) — (1) — Short-term investments 3,850 1,400 2,425 25 Total assets accounted for at fair value on a recurring basis $ 44,858 $ 1,751 $ 40,620 $ 2,487 Liabilities accounted for at fair value on a recurring basis Derivative liabilities Credit derivatives $ 10 $ — $ 10 $ — Foreign exchange derivatives 4 — 4 — Interest rate derivatives (6) — (6) — Total derivative liabilities [3] 8 — 8 — Total liabilities accounted for at fair value on a recurring basis $ 8 $ — $ 8 $ — [1] Level 3 includes investments that have contractual sales restrictions that require consent to sell and are in place for the duration that the securities are held by the Company. [2] Includes derivative instruments in a net positive fair value position after consideration of the accrued interest and impact of collateral posting requirements which may be imposed by agreements and applicable law. See footnote 3 to this table for derivative liabilities. [3] Includes derivative instruments in a net negative fair value position (derivative liability) after consideration of the accrued interest and impact of collateral posting requirements which may be imposed by agreements and applicable law. The Company has overseas deposits included in other investments of $61 and $75 as of December 31, 2024 and December 31, 2023, respectively, which are measured at fair value using the net asset value as a practical expedient. Fixed Maturities, Equity Securities, Short-term Investments, and Derivatives Valuation Techniques The Company generally determines fair values using valuation techniques that use prices, rates, and other relevant information evident from market transactions involving identical or similar instruments. Valuation techniques also include, where appropriate, estimates of future cash flows that are converted into a single discounted amount using current market expectations. The Company uses a "waterfall" approach comprised of the following pricing sources and techniques, which are listed in priority order: • Quoted prices, unadjusted, for identical assets or liabilities in active markets, which are classified as Level 1. • Prices from third-party pricing services, which primarily utilize a combination of techniques. These services utilize recently reported trades of identical, similar, or benchmark securities making adjustments for market observable inputs available through the reporting date. If there are no recently reported trades, they may use a discounted cash flow technique to develop a price using expected cash flows based upon the anticipated future performance of the underlying collateral discounted at an estimated market rate. Both techniques develop prices that consider the time value of future cash flows and provide a margin for risk, including liquidity and credit risk. Most prices provided by third-party pricing services are classified as Level 2 because the inputs used in pricing the securities are observable. However, some securities that are less liquid or trade less actively are classified as Level 3. Additionally, certain long-dated securities include benchmark interest rate or credit spread assumptions that are not observable in the marketplace and are thus classified as Level 3. • Internal matrix pricing is a valuation process internally developed for private placement securities for which the Company is unable to obtain a price from a third-party pricing service. Internal pricing matrices determine credit spreads that, when combined with risk-free rates, are applied to contractual cash flows to develop a price. The Company develops credit spreads using market based data for public securities adjusted for credit spread differentials between public and private securities, which are obtained from a survey of multiple private placement brokers. The market-based reference credit spread considers the issuer’s sector, financial strength, and term to maturity, using an independent public security index, while the credit spread differential considers the non-public nature of the security. Securities priced using internal matrix pricing are classified as Level 2 because the significant inputs are observable or can be corroborated with observable data. • Independent broker quotes, which are typically non-binding, use inputs that can be difficult to corroborate with observable market based data. Brokers may use present value techniques using assumptions specific to the security types, or they may use recent transactions of similar securities. Due to the lack of transparency in the process that brokers use to develop prices, valuations that are based on independent broker quotes are classified as Level 3. The fair value of derivative instruments is determined primarily using a discounted cash flow model or option model technique and incorporates counterparty credit risk. In some cases, quoted market prices for exchange-traded and OTC cleared derivatives may be used and in other cases independent broker quotes may be used. The pricing valuation models primarily use inputs that are observable in the market or can be corroborated by observable market data. The valuation of certain derivatives may include significant inputs that are unobservable, such as volatility levels, and reflect the Company’s view of what other market participants would use when pricing such instruments. Valuation Controls The process for determining the fair value of investments is monitored by the Valuation Committee, which is a cross-functional group of senior management within the Company. The purpose of the Valuation Committee is to provide oversight of the pricing policy, procedures and controls, including approval of valuation methodologies and pricing sources. The Valuation Committee reviews market data trends, pricing statistics and trading statistics to ensure that prices are reasonable and consistent with our fair value framework. Controls and procedures used to assess third-party pricing services are reviewed by the Valuation Committee, including the results of annual due-diligence reviews. Controls include, but are not limited to, reviewing daily and monthly price changes, stale prices, and missing prices and comparing new trade prices to third-party pricing services, weekly price changes to published bond index prices, and daily OTC derivative market valuations to counterparty valuations. The Company has a dedicated pricing group that works with trading and investment professionals to challenge prices received by a third party pricing source if the Company believes that the valuation received does not accurately reflect the fair value. New valuation models and changes to current models require approval by the Valuation Committee. In addition, the Company’s enterprise-wide Operational Risk Management function provides an independent review of the suitability and reliability of model inputs, as well as an analysis of significant changes to current models. Valuation Inputs Quoted prices for identical assets in active markets are considered Level 1 and consist of on-the-run U.S. Treasuries, money market funds, exchange-traded equity securities, open-ended mutual funds, certain short-term investments, and exchange traded derivative instruments. Valuation Inputs Used in Levels 2 and 3 Measurements for Securities and Derivatives Level 2 Primary Observable Inputs Level 3 Primary Unobservable Inputs Fixed Maturity Investments Structured securities (includes ABS, CLOs, CMBS and RMBS) • Benchmark yields and spreads Other inputs for ABS, CLOs, and RMBS: • Independent broker quotes • Credit spreads beyond observable curve • Interest rates beyond observable curve Other inputs for less liquid securities or those that trade less actively, including subprime RMBS: • Estimated cash flows • Credit spreads, which include illiquidity premium • Constant prepayment rates • Constant default rates • Loss severity Corporates • Benchmark yields and spreads Other inputs for investment grade privately placed securities that utilize internal matrix pricing: • Independent broker quotes Other inputs for below investment grade privately placed securities and private bank loans: U.S. Treasuries, Municipals, and Foreign government/government agencies • Benchmark yields and spreads • Issuer credit default swap curves • Political events in emerging market economies • Municipal Securities Rulemaking Board reported trades and material event notices • Issuer financial statements • Credit spreads beyond observable curve • Interest rates beyond observable curve Equity Securities • Quoted prices in markets that are not active • For privately traded equity securities, internal discounted cash flow models utilizing earnings multiples or other cash flow assumptions that are not observable Short-term Investments • Benchmark yields and spreads • Reported trades, bids, offers • Issuer spreads and credit default swap curves • Material event notices and new issue money market rates • Independent broker quotes Derivatives Credit derivatives • Swap yield curve • Credit default swap curves • Not applicable Foreign exchange derivatives • Swap yield curve • Currency spot and forward rates • Cross currency basis curves • Not applicable Interest rate derivatives • Swap yield curve • Not applicable Equity derivatives • Equity index levels • Not applicable Significant Unobservable Inputs for Level 3 - Securities Assets accounted for at fair value on a recurring basis Fair Value Predominant Valuation Technique Significant Unobservable Input Minimum Maximum Weighted Average [1] Impact of Increase in Input on Fair Value [2] As of December 31, 2024 CMBS [3] $ 166 Discounted cash flows Spread (encompasses prepayment, default risk and loss severity) 200 bps 1,221 bps 418 bps Decrease Corporate [4] $ 2,166 Discounted cash flows Spread 81 bps 794 bps 286 bps Decrease RMBS [3] $ 19 Discounted cash flows Spread [6] 100 bps 372 bps 181 bps Decrease Constant prepayment rate [6] 1% 6% 4% Decrease [5] Constant default rate [6] 1% 4% 2% Decrease Loss severity [6] 30% 50% 41% Decrease Short-term investments $ 98 Discounted cash flows Spread 266 bps 266 bps 266 bps Decrease As of December 31, 2023 CLOs [3] $ 98 Discounted cash flows Spread 268 bps 270 bps 269 bps Decrease CMBS [3] $ 226 Discounted cash flows Spread (encompasses prepayment, default risk and loss severity) 365 bps 1,315 bps 509 bps Decrease Corporate [4] $ 1,741 Discounted cash flows Spread 49 bps 743 bps 323 bps Decrease RMBS $ 36 Discounted cash flows Spread [6] 32 bps 298 bps 161 bps Decrease Constant prepayment rate [6] 1% 5% 4% Decrease [5] Constant default rate [6] 1% 5% 2% Decrease Loss severity [6] 10% 70% 41% Decrease Short-term investments [3] $ 15 Discounted cash flows Spread 579 bps 1,254 bps 1,225 bps Decrease [1] The weighted average is determined based on the fair value of the securities. [2] Conversely, the impact of a decrease in input would have the opposite impact to the fair value as that presented in the table. [3] Excludes securities for which the Company bases fair value on broker quotations. [4] Excludes securities for which the Company bases fair value on broker quotations; however, included are broker priced lower-rated private placement securities for which the Company receives spread and yield information to corroborate the fair value. [5] Decrease for above market rate coupons and increase for below market rate coupons. [6] Generally, a change in the assumption used for the constant default rate would have been accompanied by a directionally similar change in the assumption used for the loss severity and a directionally opposite change in the assumption used for constant prepayment rate and would have resulted in wider spreads. As of December 31, 2024 and 2023, the fair values of the Company's level 3 derivatives were less than $1 for both periods. The table above excludes certain securities for which fair values are predominately based on independent broker quotes. While the Company does not have access to the significant unobservable inputs that independent brokers may use in their pricing process, the Company believes brokers likely use inputs similar to those used by the Company and third-party pricing services to price similar instruments. As such, in their pricing models, brokers likely use estimated loss severity rates, prepayment rates, constant default rates and credit spreads. Therefore, similar to non-broker priced securities, increases in these inputs would generally cause fair values to decrease. As of December 31, 2024, no significant adjustments were made by the Company to broker prices received. Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs The Company uses derivative instruments to manage the risk associated with certain assets and liabilities. However, the derivative instrument may not be classified within the same fair value hierarchy level as the associated asset or liability. Fair Value Rollforwards for Financial Instruments Classified as Level 3 for the Total realized/unrealized gains (losses) Fair value as of January 1, 2024 Included in net income [1] Included in OCI [2] Purchases Settlements Sales Transfers into Level 3 [3] Transfers out of Level 3 [3] Fair value as of December 31, 2024 Assets Fixed maturities, AFS ABS $ — $ — $ — $ 70 $ — $ — $ — $ (48) $ 22 CLOs 113 — — 919 (64) — — (852) 116 CMBS 227 (6) 18 — (10) (67) 39 (34) 167 Corporate 1,861 — (23) 876 (316) (126) 9 — 2,281 RMBS 36 — — 90 (17) — — (85) 24 Total fixed maturities, AFS 2,237 (6) (5) 1,955 (407) (193) 48 (1,019) 2,610 FVO securities 167 (7) — 52 (15) — — — 197 Equity securities, at fair value 58 3 — 49 (20) (3) — — 87 Short-term investments 25 — — 145 (72) — — — 98 Total Assets $ 2,487 $ (10) $ (5) $ 2,201 $ (514) $ (196) $ 48 $ (1,019) $ 2,992 Fair Value Rollforwards for Financial Instruments Classified as Level 3 for the Total realized/unrealized gains (losses) Fair value as of January 1, 2023 Included in net income [1] Included in OCI [2] Purchases Settlements Sales Transfers into Level 3 [3] Transfers out of Level 3 [3] Fair value as of December 31, 2023 Assets Fixed maturities, AFS ABS $ 30 $ — $ — $ 82 $ — $ — $ — $ (112) $ — CLOs 115 — — 102 (49) — — (55) 113 CMBS 222 (2) 3 6 (18) (5) 21 — 227 Corporate 1,589 (5) 71 458 (196) (11) 50 (95) 1,861 RMBS 95 — — 40 (29) — — (70) 36 Total fixed maturities, AFS 2,051 (7) 74 688 (292) (16) 71 (332) 2,237 FVO securities 178 (1) — — (10) — — — 167 Equity securities, at fair value 61 (1) — 1 (3) — — — 58 Short-term investments 193 — — 48 (216) — — — 25 Total Assets $ 2,483 $ (9) $ 74 $ 737 $ (521) $ (16) $ 71 $ (332) $ 2,487 [1] Amounts in these columns are generally reported in net realized gains (losses) [2] All amounts are before income taxes. [3] Transfers into and/or (out of) Level 3 are primarily attributable to the availability of market observable information and the re-evaluation of the observability of pricing inputs. Changes in Unrealized Gains (Losses) for Financial Instruments Classified as Level 3 Still Held at Year End December 31, 2024 December 31, 2023 Changes in Unrealized Gain/(Loss) included in Net Income [1] [2] Changes in Unrealized Gain/(Loss) included in OCI [3] Changes in Unrealized Gain/(Loss) included in Net Income [1] [2] Changes in Unrealized Gain/(Loss) included in OCI [3] Assets Fixed maturities, AFS CLOs $ — $ — $ — $ 1 CMBS — 10 — 2 Corporate — (26) (6) 71 Total fixed maturities, AFS — (16) (6) 74 FVO securities (7) — (1) — Equity securities, at fair value — — (1) — Total Assets $ (7) $ (16) $ (8) $ 74 [1] All amounts in these rows are reported in net realized gains (losses [2] Amounts presented are for Level 3 only and therefore may not agree to other disclosures included herein. [3] Changes in unrealized gains (losses) on fixed maturities, AFS are reported in changes in net unrealized gain (loss) on fixed maturities in the Consolidated Statements of Comprehensive Income (Loss). Fair Value Option The Company has elected the fair value option for certain investments in residual interests of securitizations and other securities that contain embedded credit derivatives with underlying credit risk related to residential real estate in order to reflect changes in fair value in earnings. These instruments are included within FVO securities on the Consolidated Balance Sheets and changes in the fair value of these investments are reported in net realized gains and losses. As of December 31, 2024 and 2023, the fair value of assets using the fair value option was $308 and $327, respectively, of which $197 and $167, respectively, were residual interests of securitizations. For the years ended December 31, 2024, 2023, and 2022, net realized gains (losses) related to the change in fair value of assets using the fair value option were $(5), $5, and $(28), respectively. Financial Instruments Not Carried at Fair Value Financial Assets and Liabilities Not Carried at Fair Value December 31, 2024 December 31, 2023 Fair Value Hierarchy Level Carrying Amount [1] Fair Value Fair Value Hierarchy Level Carrying Amount [1] Fair Value Assets Mortgage loans Level 3 $ 6,396 $ 5,901 Level 3 $ 6,087 $ 5,584 Liabilities Other policyholder funds and benefits payable Level 3 $ 614 $ 614 Level 3 $ 638 $ 639 Senior notes [2] Level 2 $ 3,867 $ 3,406 Level 2 $ 3,863 $ 3,533 Junior subordinated debentures [2] Level 2 $ 499 $ 460 Level 2 $ 499 $ 429 [1] As of December 31, 2024 and December 31, 2023, the carrying amount of mortgage loans is net of ACL of $44 and $51, respectively [2] Included in long-term debt in the Consolidated Balance Sheets, except for any current maturities, which are included in short-term debt when applicable.

Investments

Investments	12 Months Ended
	Dec. 31, 2024
Investments [Abstract]
Investments	5. INVESTMENTS Net Investment Income For the years ended December 31, (Before tax) 2024 2023 2022 Fixed maturities [1] $ 2,204 $ 1,895 $ 1,469 Equity securities 35 45 57 Mortgage loans 266 235 211 Limited partnerships and other alternative investments 148 212 515 Other investments [2] 14 9 5 Gross investment income $ 2,667 $ 2,396 $ 2,257 Investment expenses (99) (91) (80) Total net investment income $ 2,568 $ 2,305 $ 2,177 [1] Includes net investment income on short-term investments. [2] Primarily includes changes in fair value of certain equity fund investments and income from derivatives that qualify for hedge accounting and are used to hedge fixed maturities. Net Realized Gains (Losses) For the years ended December 31, (Before tax) 2024 2023 2022 Gross gains on sales of fixed maturities $ 31 $ 30 $ 57 Gross losses on sales of fixed maturities (198) (149) (315) Equity securities [1] Net realized gains (losses) on sales of equity securities (11) 100 (83) Change in net unrealized gains (losses) of equity securities 84 (22) (266) Net realized and unrealized gains (losses) on equity securities 73 78 (349) Net credit losses on fixed maturities, AFS (2) (14) (18) Change in ACL on mortgage loans 3 (15) (7) Intent-to-sell impairments — — (6) Other, net [2] 32 (118) 11 Net realized (losses) $ (61) $ (188) $ (627) [1] The change in net unrealized gains (losses) on equity securities still held as of the end of the period and included in net realized gains (losses) were $68, $17, and $(108) for the years ended December 31, 2024, 2023, and 2022, respectively. [2] Includes gains (losses) on non-qualifying derivatives for the years ended December 31, 2024, 2023, and 2022 of $13, $(108), and $46, respectively, and gains (losses) from transactional foreign currency revaluation of $20, $(15), and $28, respectively. Proceeds from the sales of fixed maturities, AFS totaled $5.7 billion, $3.8 billion, and $11.4 billion for the years ended December 31, 2024, 2023, and 2022, respectively. Sales of fixed maturities, AFS in 2024 were primarily a result of tactical changes to the portfolio driven by changing market conditions, in addition to duration and liquidity management. Non-cash investing activities for the year ended December 31, 2024, included $ 18 80 Accrued Investment Income on Fixed Maturities, AFS and Mortgage Loans As of December 31, 2024 and December 31, 2023, the Company reported accrued investment income related to fixed maturities, AFS of $412 and $371, respectively, and accrued investment income related to mortgage loans of $22 and $20, respectively. These amounts are not included in the carrying value of the fixed maturities or mortgage loans. Investment income on fixed maturities and mortgage loans is accrued unless it is past due over 90 days or management deems the interest uncollectible. The Company does not include the current accrued investment income balance when estimating the ACL. The Company has a policy to write-off accrued investment income balances that are more than 90 days past due. Write- offs of accrued investment income are recorded as a credit loss component of net realized gains and losses. Recognition and Presentation of Intent-to-Sell Impairments and ACL on Fixed Maturities, AFS The Company will record an "intent-to-sell impairment" as a reduction to the amortized cost of fixed maturities, AFS in an unrealized loss position if the Company intends to sell or it is more likely than not that the Company will be required to sell the fixed maturity before a recovery in value. A corresponding charge is recorded in net realized losses equal to the difference between the fair value on the impairment date and the amortized cost basis of the fixed maturity before recognizing the impairment. For fixed maturities where a credit loss has been identified and no intent-to-sell impairment has been recorded, the Company will record an ACL for the portion of the unrealized loss related to the credit loss. Any remaining unrealized loss on a fixed maturity after recording an ACL is the non-credit amount and is recorded in OCI. The ACL is the excess of the amortized cost over the greater of the Company's best estimate of the present value of expected future cash flows or the security's fair value. Cash flows are discounted at the effective yield that is used to record interest income. The ACL cannot exceed the unrealized loss and, therefore, it may fluctuate with changes in the fair value of the fixed maturity if the fair value is greater than the Company's best estimate of the present value of expected future cash flows. The initial ACL and any subsequent changes are recorded in net realized gains and losses. The ACL is written off against the amortized cost in the period in which all or a portion of the related fixed maturity is determined to be uncollectible. Developing the Company’s best estimate of expected future cash flows is a quantitative and qualitative process that incorporates information received from third-party sources along with certain internal assumptions regarding the future performance. The Company's considerations include, but are not limited to, (a) changes in the financial condition of the issuer and/or the underlying collateral, (b) whether the issuer is current on contractually obligated interest and principal payments, (c) credit ratings, (d) payment structure of the security and (e) the extent to which the fair value has been less than the amortized cost of the security. For non-structured securities, assumptions include, but are not limited to, economic and industry-specific trends and fundamentals, instrument-specific developments including changes in credit ratings, industry earnings multiples and the issuer’s ability to restructure, access capital markets, and execute asset sales. For structured securities, assumptions include, but are not limited to, various performance indicators such as historical and projected default and recovery rates, credit ratings, current and projected delinquency rates, loan-to-value ("LTV ") ratios, average cumulative collateral loss rates that vary by vintage year, prepayment speeds, and property value declines. These assumptions require the use of significant management judgment and include the probability of issuer default and estimates regarding timing and amount of expected recoveries which may include estimating the underlying collateral value. ACL on Fixed Maturities, AFS by Type For the years ended December 31, 2024 2023 2022 (Before tax) CMBS Corporate Total CMBS Corporate Total CMBS Corporate Foreign govt./govt. agencies Total Balance as of beginning of period $ 12 $ 9 $ 21 $ 10 $ 2 $ 12 $ — $ 1 $ — $ 1 Credit losses on fixed maturities where an allowance was not previously recorded 1 — 1 — 9 9 7 10 3 20 Reduction due to sales — (3) (3) — (5) (5) — (3) (1) (4) Reduction due to intent to sell — — — — — — — — (3) (3) Net increases (decreases) on fixed maturities where an allowance was previously recorded — 1 1 2 3 5 3 (3) 1 1 Write-offs charged against the allowance — (4) (4) — — — — (3) — (3) Balance as of end of period $ 13 $ 3 $ 16 $ 12 $ 9 $ 21 $ 10 $ 2 $ — $ 12 Fixed Maturities, AFS Fixed Maturities, AFS, by Type December 31, 2024 December 31, 2023 Amortized Cost ACL Gross Unrealized Gains Gross Unrealized Losses Fair Value Amortized Cost ACL Gross Unrealized Gains Gross Unrealized Losses Fair Value ABS $ 3,948 $ — $ 28 $ (39) $ 3,937 $ 3,347 $ — $ 18 $ (45) $ 3,320 CLOs 3,237 — 13 — 3,250 3,104 — 3 (17) 3,090 CMBS 2,976 (13) 21 (248) 2,736 3,466 (12) 19 (348) 3,125 Corporate 21,555 (3) 117 (1,033) 20,636 18,691 (9) 197 (1,013) 17,866 Foreign govt./govt. agencies 500 — 3 (23) 480 583 — 6 (27) 562 Municipal 5,574 — 77 (347) 5,304 6,207 — 131 (299) 6,039 RMBS 5,610 — 13 (393) 5,230 4,675 — 18 (406) 4,287 U.S. Treasuries 1,138 — — (144) 994 1,653 — 26 (150) 1,529 Total fixed maturities, AFS $ 44,538 $ (16) $ 272 $ (2,227) $ 42,567 $ 41,726 $ (21) $ 418 $ (2,305) $ 39,818 Fixed Maturities, AFS, by Contractual Maturity Year December 31, 2024 December 31, 2023 Amortized Cost Fair Value Amortized Cost Fair Value One year or less $ 1,308 $ 1,298 $ 1,526 $ 1,501 Over one year through five years 9,564 9,414 9,670 9,433 Over five years through ten years 7,687 7,334 6,568 6,211 Over ten years 10,208 9,368 9,370 8,851 Subtotal 28,767 27,414 27,134 25,996 Mortgage-backed and asset-backed securities 15,771 15,153 14,592 13,822 Total fixed maturities, AFS $ 44,538 $ 42,567 $ 41,726 $ 39,818 Estimated maturities may differ from contractual maturities due to call or prepayment provisions. Due to the potential for variability in payment speeds (i.e., prepayments or extensions), mortgage-backed and asset-backed securities are not categorized by contractual maturity. Concentration of Credit Risk The Company aims to maintain a diversified investment portfolio including issuer, sector and geographic stratification, where applicable, and has established certain exposure limits, diversification standards and review procedures to mitigate credit risk. The Company had no investment exposure to any credit concentration risk of a single issuer greater than 10% of the Company's stockholders' equity as of December 31, 2024, or December 31, 2023, other than U.S. government securities and certain U.S. government agencies. As of December 31, 2024, other than U.S. government securities and certain U.S. government agencies, the Company’s three largest exposures by issuer were NextEra Energy Inc., Morgan Stanley, and the Government of Canada, each of which comprised less than 1% of total invested assets. As of December 31, 2023, other than U.S. government securities and certain U.S. government agencies, the Company’s three largest exposures by issuer were NextEra Energy Inc., the Government of Canada, and Morgan Stanley, each of which comprised less than 1% of total invested assets. The Company’s three largest exposures by sector as of December 31, 2024, were the financial services sector, the municipal sector, and the RMBS sector, which comprised approximately 11%, 9%, and 9%, respectively, of total invested assets. The Company’s three largest exposures by sector as of December 31, 2023, were the municipal sector, the financial services sector, and the RMBS sector, which comprised approximately 11%, 9%, and 8%, respectively, of total invested assets. Unrealized Losses on Fixed Maturities, AFS Unrealized Loss Aging for Fixed Maturities, AFS by Type and Length of Time as of December 31, 2024 Less Than 12 Months 12 Months or More Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses ABS $ 1,088 $ (14) $ 407 $ (25) $ 1,495 $ (39) CLOs 78 — — — 78 — CMBS 228 (4) 2,299 (244) 2,527 (248) Corporate 5,883 (138) 8,212 (895) 14,095 (1,033) Foreign govt./govt. agencies 165 (5) 178 (18) 343 (23) Municipal 1,263 (27) 2,712 (320) 3,975 (347) RMBS 1,297 (29) 2,672 (364) 3,969 (393) U.S. Treasuries 406 (26) 461 (118) 867 (144) Total fixed maturities, AFS in an unrealized loss position $ 10,408 $ (243) $ 16,941 $ (1,984) $ 27,349 $ (2,227) Unrealized Loss Aging for Fixed Maturities, AFS by Type and Length of Time as of December 31, 2023 Less Than 12 Months 12 Months or More Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses ABS $ 604 $ (6) $ 1,043 $ (39) $ 1,647 $ (45) CLOs 209 (1) 2,249 (16) 2,458 (17) CMBS 117 (7) 2,837 (341) 2,954 (348) Corporate 810 (10) 11,149 (1,003) 11,959 (1,013) Foreign govt./govt. agencies 27 — 368 (27) 395 (27) Municipal 329 (3) 3,196 (296) 3,525 (299) RMBS 181 (3) 3,207 (403) 3,388 (406) U.S. Treasuries 120 (11) 1,121 (139) 1,241 (150) Total fixed maturities, AFS in an unrealized loss position $ 2,397 $ (41) $ 25,170 $ (2,264) $ 27,567 $ (2,305) As of December 31, 2024, fixed maturities, AFS in an unrealized loss position consisted of 3,933 instruments and were primarily depressed due to higher interest rates and/or wider credit spreads since the purchase date. As of December 31, 2024, 94% of these fixed maturities were depressed less than 20% of cost or amortized cost. The total gross unrealized losses as of December 31, 2024 are largely consistent with year-end 2023. Most of the fixed maturities depressed for twelve months or more relate to the corporate sector, RMBS, municipal bonds, and CMBS, which were primarily depressed because current rates are higher and/or market spreads are wider than at the respective purchase dates. The Company neither has an intention to sell nor does it expect to be required to sell the fixed maturities outlined in the preceding discussion. The decision to record credit losses on fixed maturities, AFS in the form of an ACL requires us to make qualitative and quantitative estimates of expected future cash flows. Mortgage Loans ACL on Mortgage Loans The Company reviews mortgage loans on a quarterly basis to estimate the ACL with changes in the ACL recorded in net realized gains and losses. Apart from an ACL recorded on individual mortgage loans where the borrower is experiencing financial difficulties, the Company records an ACL on the pool of mortgage loans based on lifetime expected credit losses. The Company utilizes a third-party forecasting model to estimate lifetime expected credit losses at a loan level under multiple economic scenarios. The scenarios use macroeconomic data provided by an internationally recognized economics firm that generates forecasts of varying economic factors such as GDP growth, unemployment and interest rates. The economic scenarios are projected over 10 years. The first two to four years of the 10-year period assume a specific modeled economic scenario (including moderate upside, moderate recession and severe recession scenarios) and then revert to historical long-term assumptions over the remaining period. Using these economic scenarios, the forecasting model projects property-specific operating income and capitalization rates used to estimate the value of a future operating income stream. The operating income and the property valuations derived from capitalization rates are compared to loan payment and principal amounts to create debt service coverage ratios ("DSCRs") and LTVs over the forecast period. The Company's process also considers qualitative factors. The model overlays historical data about mortgage loan performance based on DSCRs and LTVs and projects the probability of default, amount of loss given a default and resulting expected loss through maturity for each loan under each economic scenario. Economic scenarios are probability-weighted based on a statistical analysis of the forecasted economic factors and qualitative analysis. The Company records the change in the ACL on mortgage loans based on the weighted-average expected credit losses across the selected economic scenarios. When a borrower is experiencing financial difficulty, including when foreclosure is probable, the Company measures an ACL on individual mortgage loans. The ACL is established for any shortfall between the amortized cost of the loan and the fair value of the collateral less costs to sell. Estimates of collectibility from an individual borrower require the use of significant management judgment and include the probability and timing of borrower default and loss severity estimates. In addition, cash flow projections may change based upon new information about the borrower's ability to pay and/or the value of underlying collateral such as changes in projected property value estimates. During the period in which all or a portion of the mortgage loan is determined to be uncollectible, the ACL is written off against the amortized cost. There were no mortgage loans held-for-sale as of December 31, 2024 or December 31, 2023. For the year ended December 31, 2024, one office property mortgage loan with an amortized cost of $9 was granted a term extension of three years at the original rate, which is a below-market rate, with a borrower experiencing financial difficulties. The modified loan represents less than 1% of the mortgage loan portfolio and is current and performing in conjunction with the modified terms. For the year ended December 31, 2023, the Company had no mortgage loans that have had extensions or restructurings other than what is allowable under the original terms of the contract or with borrowers experiencing financial difficulties. ACL on Mortgage Loans For the years ended December 31, 2024 2023 2022 ACL as of beginning of period $ 51 $ 36 $ 29 Current period provision (release) (3) 15 7 Current period gross write-offs (4) — — ACL as of December 31, $ 44 $ 51 $ 36 The weighted-average LTV ratio of the Company’s mortgage loan portfolio was 56% as of December 31, 2024, while the weighted-average LTV ratio at origination of these loans was 59%. LTV ratios compare the loan amount to the value of the underlying property collateralizing the loan with property values based on appraisals updated no less than annually. Factors considered in estimating property values include, among other things, actual and expected property cash flows, geographic market data and the ratio of the property's net operating income to its value. DSCR compares a property’s net operating income to the borrower’s principal and interest payments and are updated no less than annually through reviews of underlying properties. Mortgage Loans LTV & DSCR by Origination Year as of December 31, 2024 2024 2023 2022 2021 2020 2019 & Prior Total Loan-to-value Amortized Cost Avg. DSCR Amortized Cost Avg. DSCR Amortized Cost Avg. DSCR Amortized Cost Avg. DSCR Amortized Cost Avg. DSCR Amortized Cost Avg. DSCR Amortized Cost [1] Avg. DSCR Greater than 80% $ 25 0.63x $ — —x $ 16 1.05x $ 37 1.03x $ — —x $ 110 1.68x $ 188 1.34x 65% - 80% 89 1.42x 7 1.35x 204 1.89x 421 2.55x 100 3.60x 439 2.01x 1,260 2.26x Less than 65% 357 1.62x 489 1.39x 696 2.85x 1,108 2.93x 518 2.67x 1,824 2.71x 4,992 2.57x Total mortgage loans $ 471 1.52x $ 496 1.39x $ 916 2.61x $ 1,566 2.79x $ 618 2.82x $ 2,373 2.53x $ 6,440 2.47x [1]Amortized cost of mortgage loans excludes ACL of $44. Mortgage Loans LTV & DSCR by Origination Year as of December 31, 2023 2023 2022 2021 2020 2019 2018 & Prior Total Loan-to-value Amortized Cost Avg. DSCR Amortized Cost Avg. DSCR Amortized Cost Avg. DSCR Amortized Cost Avg. DSCR Amortized Cost Avg. DSCR Amortized Cost Avg. DSCR Amortized Cost [1] Avg. DSCR Greater than 80% $ — —x $ 16 1.09x $ 38 1.05x $ — —x $ — —x $ 105 1.41x $ 159 1.29x 65% - 80% — —x 189 2.13x 457 2.42x 95 3.47x 98 1.77x 252 1.77x 1,091 2.25x Less than 65% 400 1.47x 724 2.75x 1,105 2.99x 527 2.92x 679 2.90x 1,453 2.67x 4,888 2.72x Total mortgage loans $ 400 1.47x $ 929 2.60x $ 1,600 2.78x $ 622 3.00x $ 777 2.76x $ 1,810 2.47x $ 6,138 2.60x [1]Amortized cost of mortgage loans excludes ACL of $51. Mortgage Loans by Region December 31, 2024 December 31, 2023 Amortized Cost Percent of Total Amortized Cost Percent of Total East North Central $ 362 5.6 % $ 368 6.0 % Middle Atlantic 259 4.0 % 238 3.9 % Mountain 764 11.9 % 699 11.4 % New England 356 5.5 % 351 5.7 % Pacific 1,400 21.8 % 1,326 21.6 % South Atlantic 1,821 28.3 % 1,776 28.9 % West North Central 97 1.5 % 103 1.7 % West South Central 588 9.1 % 445 7.2 % Other [1] 793 12.3 % 832 13.6 % Total mortgage loans 6,440 100.0 % 6,138 100.0 % ACL (44) (51) Total mortgage loans, net of ACL $ 6,396 $ 6,087 [1] Primarily represents loans collateralized by multiple properties in various regions. Mortgage Loans by Property Type December 31, 2024 December 31, 2023 Amortized Cost Percent of Total Amortized Cost Percent of Total Commercial Industrial $ 2,737 42.5 % $ 2,363 38.5 % Multifamily 2,161 33.5 % 2,200 35.9 % Office 507 7.9 % 578 9.4 % Retail [1] 957 14.9 % 917 14.9 % Single Family 78 1.2 % 80 1.3 % Total mortgage loans 6,440 100.0 % 6,138 100.0 % ACL (44) (51) Total mortgage loans, net of ACL $ 6,396 $ 6,087 [1]Primarily comprised of grocery-anchored retail centers, with no exposure to regional shopping malls. Past-Due Mortgage Loans Mortgage loans are considered past due if a payment of principal or interest is not received according to the contractual terms of the loan agreement, which typically includes a grace period. As of December 31, 2024 and December 31, 2023, the Company held no mortgage loans considered past due. Mortgage Servicing The Company originates, sells, and services commercial mortgage loans on behalf of third parties and recognizes servicing fee income over the period that services are performed. As of December 31, 2024, under this program, the Company serviced mortgage loans with a total outstanding principal of $10.0 billion, of which $4.8 billion was serviced on behalf of third parties and $5.2 billion was retained and reported in total investments on the Company's Consolidated Balance Sheets. As of December 31, 2023, the Company serviced mortgage loans with a total outstanding principal balance of $9.4 billion, of which $4.4 billion was serviced on behalf of third parties and $5.0 billion was retained and reported in total investments on the Company's Consolidated Balance Sheets. Servicing rights are carried at the lower of cost or fair value and were $0 as of December 31, 2024 and December 31, 2023, because servicing fees were market-level fees at origination and remain adequate to compensate the Company for servicing the loans. Variable Interest Entities The Company is engaged with various special purpose entities and other entities that are deemed to be VIEs primarily as an investor through normal investment activities or, at times, as an investment manager. A VIE is an entity that either has investors that lack certain essential characteristics of a controlling financial interest, such as simple majority kick-out rights, or lacks sufficient funds to finance its own activities without financial support provided by other entities. The Company performs ongoing qualitative assessments of its VIEs to determine whether the Company has a controlling financial interest in the VIE and therefore is the primary beneficiary. The Company is deemed to have a controlling financial interest when it has both the ability to direct the activities that most significantly impact the economic performance of the VIE and the obligation to absorb losses or right to receive benefits from the VIE that could potentially be significant to the VIE. Based on the Company’s assessment, if it determines it is the primary beneficiary, the Company consolidates the VIE in the Company’s Consolidated Financial Statements. Consolidated VIEs As of December 31, 2024 and 2023, the Company did not hold any securities for which it is the primary beneficiary. Non-Consolidated VIEs The Company, through normal investment activities, makes passive investments in limited partnerships and other alternative investments. For these non-consolidated VIEs, the Company has determined it is not the primary beneficiary as it has no ability to direct activities that could significantly affect the economic performance of the investments. The Company’s maximum exposure to loss as of December 31, 2024 and 2023 is limited to the total carrying value of $3.2 billion and $3.0 billion, respectively, which are a portion of the investments in limited partnerships and other alternative investments in the Company's Consolidated Balance Sheets that are primarily recorded using the equity method of accounting. As of December 31, 2024 and 2023, the Company has outstanding commitments totaling $2.0 billion and $1.7 billion, respectively, whereby the Company is committed to fund these investments and may be called by the partnership during the commitment period to fund the purchase of new investments and partnership expenses. These investments are generally of a passive nature in that the Company does not take an active role in management. Furthermore, the Company makes investments in entities that sponsor affordable housing projects. Similarly, for these non-consolidated VIEs, the Company has determined it is not the primary beneficiary as it has no ability to direct activities that could significantly affect the economic performance of the investments. The Company applies the proportional amortization method to subsequently measure its investments in such qualified affordable housing projects, where costs are amortized over the period in which the investor expects to receive tax credits and the resulting amortization is recognized as a component of income tax expense on the Company's Consolidated Statements of Operations. For the years ended December 31, 2024, 2023, and 2022, the Company recognized amortization of $2, $1, and $0 respectively, and related tax benefits of $8, $1, and $0, respectively. The income tax credits and other income tax benefits are recognized in operating activities in the Consolidated Statement of Cash Flows. The carrying value of these investments, which are reported in other assets on the Company’s Consolidated Balance Sheets was $51 and $20 as of December 31, 2024, and December 31, 2023, respectively. As of December 31, 2024 and December 31, 2023, the Company has outstanding commitments related to affordable housing projects of $267 and $180, respectively, that are contingent on various conditions precedent to funding. In addition, the Company makes passive investments in structured securities issued by VIEs for which the Company is not the manager. These investments are included in ABS, CLOs, CMBS, and RMBS and are reported in fixed maturities, AFS, and FVO securities, on the Company's Consolidated Balance Sheets. The Company has not provided financial or other support with respect to these investments other than its original investment. For these investments, the Company determined it is not the primary beneficiary due to the relative size of the Company’s investment in comparison to the principal amount of the structured securities issued by the VIEs, the Company’s inability to direct the activities that most significantly impact the economic performance of the VIEs, and, where applicable, the level of credit subordination which reduces the Company’s obligation to absorb losses or right to receive benefits. The Company’s maximum exposure to loss on these investments is limited to the amount of the Company’s investment. For the year ended December 31, 2024, the Company sold $86 of fixed maturities, AFS for a net realized loss of less than $1 to a CLO issued by a VIE. The Company then purchased $24 of fixed maturities, AFS and $50 of FVO securities from the VIE issuer. These investments are valued based on unobservable inputs and are classified within Level 3 of the fair value hierarchy. In addition, the Company is committed to fund an additional $426 of fixed maturities, AFS in this CLO. The Company has determined it is not the primary beneficiary of the VIE issuer as it has no ability to direct the activities that could significantly affect the economic performance of the securitization. Reverse Repurchase Agreements, Other Collateral Transactions and Restricted Investments Reverse Repurchase Agreements From time to time, the Company enters into reverse repurchase agreements where the Company purchases securities and simultaneously agrees to resell the same or substantially the same securities. The maturity of these transactions is generally within one year. The agreements require additional collateral to be transferred to the Company under specified conditions and the Company has the right to sell or re-pledge the securities received. The Company accounts for reverse repurchase agreements as collateralized financing. As of December 31, 2024 and December 31, 2023, the Company reported $0 and $10, respectively, within short-term investments on the Consolidated Balance Sheets representing a receivable for the amount of cash transferred to purchase the securities. Other Collateral Transactions As of December 31, 2024 and December 31, 2023, the Company pledged collateral of $1 and $7, respectively, of U.S. government securities or cash primarily related to certain bank loan participations committed to through a limited partnership agreement. For disclosure of collateral in support of derivative transactions, refer to the Derivative Collateral Arrangements section in Note 6 - Derivatives of Notes to Consolidated Financial Statements. Other Restricted Investments The Company is required by law to deposit securities with government agencies in certain states in which it conducts business. In addition, the Company is required to hold fixed maturities and short-term investments in trust for the benefit of syndicate policyholders, hold fixed maturities in a Lloyd's of London ("Lloyd's") trust account to provide a portion of the required capital, and maintain other investments primarily consisting of overseas deposits in various countries with Lloyd's to support underwriting activities in those countries. Lloyd's is an insurance market-place operating worldwide. Lloyd's does not underwrite risks. The Company accepts risks as the sole member of Lloyd's Syndicate 1221 ("Lloyd's Syndicate"). The following table presents the components of the Company’s exposure to other restricted investments. December 31, 2024 December 31, 2023 Fair Value Fair Value Securities on deposit with government agencies $ 2,362 $ 2,339 Fixed maturities in trust for benefit of Lloyd's Syndicate policyholders 1,056 890 Short-term investments in trust for benefit of Lloyd's Syndicate policyholders 25 30 Fixed maturities in Lloyd's trust account — 154 Other investments 61 75 Total Other Restricted Investments $ 3,504 $ 3,488 Equity Method Investments The majority of the Company's investments in limited partnerships and other alternative investments, including real estate joint ventures, real estate funds, private equity funds, and other funds (collectively, “limited partnerships”), are accounted for under the equity method of accounting. The remainder of investments in limited partnerships and other alternative investments consists of investments in insurer-owned life insurance accounted for at cash surrender value. Equity method income is reported in net investment income, except amounts related to strategic investments classified in other assets which are reported in other revenues. For investments accounted for under the equity method, the Company’s maximum exposure to loss as of December 31, 2024 is limited to the total carrying value of $4.6 billion. In addition, the Company has outstanding commitments totaling $2.1 billion to fund limited partnership investments as of December 31, 2024. The Company’s investments accounted for under the equity method are generally of a passive nature in that the Company does not take an active role in the management. For the period ended December 31, 2024, aggregate investment income from investments accounted for under the equity method did not exceed 10% of the Company’s before tax consolidated net income. For the periods ended December 31, 2023 and 2022, aggregate investment income from investments accounted for under the equity method exceeded 10% of the Company’s before tax consolidated net income. Accordingly, the Company is disclosing aggregated, summarized financial data for the Company’s investments accounted for under the equity method based on the most recently available information. This aggregated, summarized financial data does not represent the Company’s proportionate share of investees' assets or earnings. Aggregated summarized financial information of the Company’s equity method investees: As of December 31, 2024 2023 Balance sheet: Total assets $ 356,430 $ 308,259 Total liabilities $ 57,017 $ 44,950 The Company's carrying value $ 4,552 $ 4,328 For the years ended December 31, 2024 2023 2022 Operating results: Net investment income (loss) $ (1,002) $ (1,240) $ 1,604 Net income excluding net investment income $ 14,778 $ 13,000 $ 11,885 The Company's share of equity method income $ 103 $ 181 $ 533

Derivatives

Derivatives	12 Months Ended
	Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	6. DERIVATIVES The Company utilizes a variety of OTC, OTC-cleared and exchange traded derivative instruments as a part of its overall risk management strategy as well as to enter into replication transactions or income generation covered call transactions. Derivative instruments are used to manage risk associated with interest rate, equity market, commodity market, credit spread, issuer default, price, and currency exchange rate or volatility. Replication transactions are used as an economical means to synthetically replicate the characteristics and performance of assets that are permissible investments under the Company’s investment policies. Strategies that Qualify for Hedge Accounting Some of the Company's derivatives satisfy hedge accounting requirements as outlined in Note 1 - Basis of Presentation and Significant Accounting Policies. Typically, these hedging instruments include interest rate swaps and, to a lesser extent, foreign currency swaps where the terms or expected cash flows of the hedged item closely match the terms of the swap. Cash Flow Hedges Interest rate swaps are predominantly used to manage portfolio duration and better match cash receipts from assets with cash disbursements required to fund liabilities. These derivatives primarily convert interest receipts on variable-rate fixed maturity securities to fixed rates. The Company has also entered into interest rate swaps to convert the variable interest payments on the $500 junior subordinated debentures due 2067 to fixed interest payments. For further information, see the Junior Subordinated Debentures section within Note 13 - Debt. Foreign currency swaps are used to convert foreign currency-denominated cash flows related to certain investment receipts to U.S. dollars in order to reduce cash flow fluctuations due to changes in currency rates. Non-qualifying Strategies Derivative relationships that do not qualify for hedge accounting (“non-qualifying strategies”) primarily include hedges of interest rate, foreign currency, equity, and commodity risk of certain fixed maturities and equities. In addition, hedging and replication strategies that utilize credit default swaps do not qualify for hedge accounting. The non-qualifying strategies include: Credit Contracts Credit default swaps are used to purchase credit protection on an individual entity or referenced index to economically hedge against default risk and credit-related changes in the value of fixed maturity securities. Credit default swaps are also used to assume credit risk related to an individual entity or referenced index as a part of replication transactions. These contracts require the Company to pay or receive a periodic fee in exchange for compensation from the counterparty or the Company should the referenced security issuers experience a credit event, as defined in the contract. The Company also enters into credit default swaps to terminate existing credit default swaps, thereby offsetting the changes in value of the original swap going forward. Interest Rate Swaps and Futures The Company uses interest rate swaps and, to a lesser extent, futures to manage interest rate duration between assets and liabilities. In addition, the Company enters into interest rate swaps to terminate existing swaps, thereby offsetting the changes in value of the original swap going forward. As of December 31, 2024 and December 31, 2023, the notional amount of interest rate swaps in offsetting relationships was $344 and $6.6 billion, respectively. Foreign Currency Swaps and Forwards The Company enters into foreign currency swaps to convert the foreign currency exposures of certain foreign currency-denominated fixed maturity investments to U.S. dollars. Equity Index Options The Company enters into equity index options to hedge the impact of a decline in the equity markets on the investment portfolio. Commodity Options The Company previously purchased call option contracts on oil futures in order to partially offset potential changes in value related to certain fixed maturity securities that could arise if oil prices increased substantially. Derivative Balance Sheet Classification For reporting purposes, the Company has elected to offset within assets or liabilities based upon the net of the fair value amounts, income accruals, and related cash collateral receivables and payables of OTC derivative instruments executed in a legal entity and with the same counterparty under a master netting agreement, which provides the Company with the legal right of offset. The following fair value amounts do not include income accruals or related cash collateral receivables and payables, which are netted with derivative fair value amounts to determine balance sheet presentation. The Company’s derivative instruments are held for risk management purposes, unless otherwise noted in the following table. The notional amount of derivative contracts represents the basis upon which pay or receive amounts are calculated and is presented in the table to quantify the volume of the Company’s derivative activity. Notional amounts are not necessarily reflective of credit risk. Derivative Balance Sheet Presentation Net Derivatives Asset Derivatives Liability Derivatives Notional Amount Fair Value Fair Value Fair Value Hedge Designation/ Derivative Type Dec 31, 2024 Dec 31, 2023 Dec 31, 2024 Dec 31, 2023 Dec 31, 2024 Dec 31, 2023 Dec 31, 2024 Dec 31, 2023 Cash flow hedges Interest rate swaps $ 4,225 $ 3,450 $ — $ (1) $ — $ 1 $ — $ (2) Foreign currency swaps 646 644 41 13 52 29 (11) (16) Total cash flow hedges 4,871 4,094 41 12 52 30 (11) (18) Non-qualifying strategies Interest rate contracts Interest rate swaps and futures 344 6,626 — (5) 1 — (1) (5) Foreign exchange contracts Foreign currency swaps and forwards 647 645 — — — — — — Credit contracts Credit derivatives in offsetting positions 986 998 — — 31 27 (31) (27) Equity contracts Equity index options 233 — 4 — 4 — — — Total non-qualifying strategies 2,210 8,269 4 (5) 36 27 (32) (32) Total cash flow hedges and non-qualifying strategies $ 7,081 $ 12,363 $ 45 $ 7 $ 88 $ 57 $ (43) $ (50) Balance Sheet Location Fixed maturities, AFS $ 647 $ 645 $ — $ — $ — $ — $ — $ — Other investments 3,011 1,662 57 (1) 66 18 (9) (19) Other liabilities 3,423 10,056 (12) 8 22 39 (34) (31) Total derivatives $ 7,081 $ 12,363 $ 45 $ 7 $ 88 $ 57 $ (43) $ (50) . Offsetting of Derivative Assets/Liabilities The following tables present the gross fair value amounts, the amounts offset, and net position of derivative instruments eligible for offset in the Company's Consolidated Balance Sheets. Offsetting amounts include fair value amounts, income accruals and related cash collateral receivables and payables associated with derivative instruments that are traded under a common master netting agreement, as described in the preceding discussion. Also included in the tables are financial collateral receivables and payables, which are contractually permitted to be offset upon an event of default, although are disallowed for offsetting under U.S. GAAP. Offsetting Derivative Assets and Liabilities (i) (ii) (iii) = (i) - (ii) (iv) (v) = (iii) - (iv) Net Amounts Presented in the Statement of Financial Position Collateral Disallowed for Offset in the Statement of Financial Position Gross Amounts of Recognized Assets (Liabilities) Gross Amounts Offset in the Statement of Financial Position Derivative Assets [1] (Liabilities) [2] Accrued Interest and Cash Collateral (Received) [3] Pledged [2] Financial Collateral (Received) Pledged [4] Net Amount As of December 31, 2024 Other investments $ 88 $ 86 $ 57 $ (55) $ — $ 2 Other liabilities $ (43) $ (42) $ (12) $ 11 $ (1) $ — As of December 31, 2023 Other investments $ 57 $ 55 $ (1) $ 3 $ — $ 2 Other liabilities $ (50) $ (36) $ 8 $ (22) $ (13) $ (1) [1] Included in other investments in the Company's Consolidated Balance Sheets. [2] Included in other liabilities in the Company's Consolidated Balance Sheets and is limited to the net derivative payable associated with each counterparty. [3] Included in other investments in the Company's Consolidated Balance Sheets and is limited to the net derivative receivable associated with each counterparty. [4] Excludes collateral associated with exchange-traded derivative instruments. Cash Flow Hedges For derivative instruments that are designated and qualify as cash flow hedges, the gain or loss on the derivative is reported as a component of OCI and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. All components of each derivative’s gain or loss were included in the assessment of hedge effectiveness. Gain (Loss) Recognized in OCI Year Ended December 31, 2024 2023 2022 Interest rate swaps $ (14) $ 6 $ — Foreign currency swaps 41 (31) 56 Total $ 27 $ (25) $ 56 Gain (Loss) Reclassified from AOCI into Income Year Ended December 31, 2024 2023 2022 Net Investment Income Interest Expense Net Investment Income Interest Expense Net Investment Income Interest Expense Interest rate swaps $ (25) $ 16 $ (26) $ 15 $ 6 $ (2) Foreign currency swaps 12 — 10 — 9 — Total $ (13) $ 16 $ (16) $ 15 $ 15 $ (2) Total amounts presented on the Consolidated Statement of Operations $ 2,568 $ 199 $ 2,305 $ 199 $ 2,177 $ 213 As of December 31, 2024, the before tax deferred net gains on derivative instruments recorded in AOCI that are expected to be reclassified to earnings during the next twelve months are $40. This expectation is based on the anticipated interest payments on hedged investments in fixed maturity securities and long-term debt that will occur over the next twelve months. Over that time, the Company will recognize the deferred net gains (losses) as an adjustment to net investment income or interest expense, as applicable, over the term of the hedged instrument cash flows. During the years ended December 31, 2024, 2023, and 2022, the Company had no net reclassifications from AOCI to earnings resulting from the discontinuance of cash-flow hedges due to forecasted transactions that were no longer probable of occurring. Non-qualifying Strategies For non-qualifying strategies, including embedded derivatives that are required to be bifurcated from their host contracts and accounted for as derivatives, the gain or loss on the derivative is recognized currently in earnings within net realized gains (losses). Non-Qualifying Strategies Recognized within Net Realized Gains (Losses) For the Year Ended December 31, 2024 2023 2022 Foreign exchange contracts Foreign currency swaps and forwards $ — $ — $ 5 Interest rate contracts Interest rate swaps and futures 8 (3) 25 Credit contracts Credit derivatives that purchase credit protection — (105) 4 Equity contracts Equity index options 5 — (2) Commodity contracts Commodity options — — 14 Total [1] $ 13 $ (108) $ 46 [1] Excludes investments that contain an embedded credit derivative for which the Company has elected the fair value option. For further discussion, see the Fair Value Option section in Note 4 - Fair Value Measurements. Credit Risk Assumed through Credit Derivatives The Company enters into credit default swaps that assume credit risk of a single entity or referenced index in order to synthetically replicate investment transactions that are permissible under the Company's investment policies. The Company will receive periodic payments based on an agreed upon rate and notional amount and will only make a payment if there is a credit event. A credit event payment will typically be equal to the notional value of the swap contract less the value of the referenced security issuer’s debt obligation after the occurrence of the credit event. A credit event is generally defined as a default on contractually obligated interest or principal payments or bankruptcy of the referenced entity. The credit default swaps in which the Company assumes credit risk may reference investment grade single corporate issuers and baskets, which include standard diversified portfolios of corporate and CMBS issuers. Credit Risk Assumed Derivatives by Type Underlying Referenced Credit Obligation(s) [1] Notional Amount [2] Fair Value Weighted Average Years to Maturity Type Average Credit Rating Offsetting Notional Amount [3] Offsetting Fair Value [3] As of December 31, 2024 Basket credit default swaps [4] Investment grade risk exposure $ 100 $ — 4 years CMBS Credit AAA $ 100 $ — Below investment grade risk exposure 392 30 3 years Corporate Credit B+ 392 (30) Below investment grade risk exposure 1 (1) Less than 1 year CMBS Credit CCC 1 1 Total [5] $ 493 $ 29 $ 493 $ (29) As of December 31, 2023 Basket credit default swaps [4] Investment grade risk exposure $ 101 $ (1) 5 years CMBS Credit AAA $ 101 $ 1 Below investment grade risk exposure 396 24 4 years Corporate Credit B+ 396 (24) Below investment grade risk exposure 2 (1) Less than 1 year CMBS Credit CCC- 2 1 Total [5] $ 499 $ 22 $ 499 $ (22) [1] The average credit ratings are based on availability and are generally the midpoint of the available ratings among Moody’s, S&P, and Fitch. If no rating is available from a rating agency, then an internally developed rating is used. [2] Notional amount is equal to the maximum potential future loss amount. These derivatives are governed by agreements and applicable law which include collateral posting requirements. There is no additional specific collateral related to these contracts or recourse provisions included in the contracts to offset losses. [3] The Company has entered into offsetting credit default swaps to terminate certain existing credit default swaps, thereby offsetting the future changes in value of, or losses paid related to, the original swap. [4] Comprised of swaps of standard market indices of diversified portfolios of corporate and CMBS issuers referenced through credit default swaps. These swaps are subsequently valued based upon the observable standard market index. [5] Excludes investments that contain an embedded credit derivative for which the Company has elected the fair value option. For further discussion, see the Fair Value Option section in Note 4 - Fair Value Measurements. Derivative Collateral Arrangements The Company enters into various collateral arrangements in connection with its derivative instruments, which require both the pledging and accepting of collateral. As of December 31, 2024 and 2023, the Company has pledged cash collateral associated with derivative instruments of $31 and $25, respectively. In general, collateral receivable is recorded in other assets or other liabilities on the Company's Consolidated Balance Sheets as determined by the Company's election to offset on the balance sheet. As of December 31, 2024 and 2023, the Company pledged securities collateral associated with derivative instruments with a fair value of $1 and $14, respectively, which have been included in fixed maturities on the Consolidated Balance Sheets. The counterparties have the right to sell or re-pledge these securities. In addition, as of December 31, 2024 and 2023, the Company has pledged initial margin of cash related to OTC-cleared and exchange traded derivatives with a fair value of $10 and $16 respectively, which is recorded in other investments or other assets on the Company's Consolidated Balance Sheets. As of December 31, 2024 and 2023, the Company has pledged initial margin of securities related to OTC-cleared and exchange traded derivatives with a fair value of $103 and $112, respectively, which are included within fixed maturities on the Company's Consolidated Balance Sheets.

Premiums Receivable

Premiums Receivable	12 Months Ended
	Dec. 31, 2024
Credit Loss [Abstract]
Premiums Receivable Note [Text Block]	7. PREMIUMS RECEIVABLE AND AGENTS' BALANCES Premiums Receivable and Agents' Balances As of December 31, 2024 2023 Premiums receivable, excluding receivables for losses within a deductible and retrospectively-rated policy premiums ("loss sensitive business") $ 5,624 $ 5,303 Receivables for loss sensitive business, by credit quality: AA 97 94 A 57 54 BBB 193 136 BB 94 84 Below BB 50 45 Total receivables for loss sensitive business 491 413 Total Premiums Receivable and Agents' Balances, Gross 6,115 5,716 ACL (117) (109) Total Premiums Receivable and Agents' Balances, Net of ACL $ 5,998 $ 5,607 ACL on Premiums Receivable and Agents' Balances Premiums receivable and agents' balances, excluding receivables for loss sensitive business, are primarily comprised of premiums due from policyholders, which are typically collectible within one year or less. For these balances, the ACL is estimated based on an aging of receivables and recent historical credit loss and collection experience, adjusted for current economic conditions and reasonable and supportable forecasts, when appropriate. Balances are considered past due when amounts that have been billed are not collected within contractually stipulated time periods. A portion of the Company's Business Insurance business is written with large deductibles or under retrospectively-rated plans (referred to as "loss sensitive business"). Under some commercial insurance contracts with a large deductible, the Company is obligated to pay the claimant the full amount of the claim and the Company is subsequently reimbursed by the policyholder for the deductible amount. As such, the Company is subject to credit risk until reimbursement is made. Retrospectively-rated policies are utilized primarily for workers' compensation coverage, whereby the ultimate premium is adjusted based on actual losses incurred. Although the premium adjustment feature of a retrospectively-rated policy substantially reduces insurance risk for the Company, it presents credit risk to the Company. The Company’s results of operations could be adversely affected if a significant portion of such policyholders failed to reimburse the Company for the deductible amount or the amount of additional premium owed under retrospectively-rated policies. The Company manages these credit risks through credit analysis, collateral requirements, and oversight. The ACL for receivables for loss sensitive business is estimated as the amount of the receivable exposed to loss multiplied by estimated factors for probability of default and the amount of loss given a default. The probability of default is assigned based on each policyholder's credit rating, or a rating is estimated if no external rating is available. Credit ratings are reviewed and updated at least annually. The exposure amount is estimated net of collateral and other credit enhancement, considering the nature of the collateral, potential future changes in collateral values, and historical loss information for the type of collateral obtained. The probability of default factors are historical corporate defaults for receivables with similar durations estimated through multiple economic cycles. Credit ratings are forward-looking and consider a variety of economic outcomes. The loss given default factors are based on a study of historical recovery rates for general creditors through multiple economic cycles. The Company's evaluation of the required ACL for receivables for loss sensitive business considers the current economic environment as well as the probability-weighted macroeconomic scenarios similar to the approach used for estimating the ACL for mortgage loans. See Note 5 - Investments. Rollforward of ACL on Premiums Receivable and Agents' Balances for the Year Ended December 31, 2024 December 31, 2023 December 31, 2022 Receivables Excluding Receivables for Loss Sensitive Business Receivables for Loss Sensitive Business Total Receivables Excluding Receivables for Loss Sensitive Business Receivables for Loss Sensitive Business Total Receivables Excluding Receivables for Loss Sensitive Business Receivables for Loss Sensitive Business Total Beginning ACL $ 89 $ 20 $ 109 $ 85 $ 24 $ 109 $ 83 $ 22 $ 105 Current period provision (release) 64 1 65 52 (2) 50 48 3 51 Current period gross write-offs (62) (1) (63) (55) (2) (57) (56) (1) (57) Current period gross recoveries 6 — 6 7 — 7 10 — 10 Ending ACL $ 97 $ 20 $ 117 $ 89 $ 20 $ 109 $ 85 $ 24 $ 109

Reinsurance

Reinsurance	12 Months Ended
	Dec. 31, 2024
Insurance [Abstract]
Reinsurance	8. REINSURANCE The Company cedes insurance risk to reinsurers to enable the Company to manage capital and risk exposure. Such arrangements do not relieve the Company of its primary liability to policyholders. Failure of reinsurers to honor their obligations could result in losses to the Company. The Company's procedures include carefully selecting its reinsurers, structuring agreements to provide collateral funds where necessary, and regularly monitoring the financial condition and ratings of its reinsurers. The Company has two ADC reinsurance agreements in place, both of which are accounted for as retroactive reinsurance and have exhausted their treaty limit. One agreement covered substantially all A&E reserve development for 2016 and prior accident years ("A&E ADC") up to an aggregate limit of $1.5 billion and the other covered substantially all reserve development of Navigators Insurance Company ("NIC") and certain of its affiliates for 2018 and prior accident years (the "Navigators ADC") up to an aggregate limit of $300. As the Company has ceded all of the $300 and $1.5 billion available limits under the Navigators ADC and the A&E ADC, respectively, there is no remaining limit available under either agreement as of December 31, 2024. For more information on ADC agreements, see Note 1 - Basis of Presentation and Significant Accounting Policies, and Note 10 - Reserve for Unpaid Losses and Loss Adjustment Expenses. Property and Casualty ceded losses, which reduce losses and loss adjustment expenses incurred, were $1,241, $1,043 and $1,338 for the years ended December 31, 2024, 2023 and 2022, respectively. Employee Benefits ceded losses, which reduce losses and loss adjustment expenses incurred, were $120, $93 and $81 for the years ended December 31, 2024, 2023 and 2022, respectively. Reinsurance Recoverables Reinsurance recoverables include balances due from reinsurance companies and are presented net of an allowance for uncollectible reinsurance. Reinsurance recoverables include an estimate of the amount of gross losses and loss adjustment expense reserves that may be ceded under the terms of the reinsurance agreements, including incurred but not reported ("IBNR") unpaid losses. The Company’s estimate of losses and loss adjustment expense reserves ceded to reinsurers is based on assumptions that are consistent with those used in establishing the gross reserves for amounts the Company owes to its claimants. The Company estimates its ceded reinsurance recoverables based on the terms of any applicable facultative and treaty reinsurance, including an estimate of how IBNR unpaid losses will ultimately be ceded under reinsurance agreements. Accordingly, the Company’s estimate of reinsurance recoverables is subject to similar risks and uncertainties as the estimate of the gross reserve for unpaid losses and loss adjustment expenses. Reinsurance Recoverables by Credit Quality Indicator As of December 31, 2024 As of December 31, 2023 P&C Employee Benefits Corporate Total P&C Employee Benefits Corporate Total AM Best Financial Strength Rating A++ $ 2,271 $ — $ — $ 2,271 $ 2,398 $ — $ — $ 2,398 A+ 2,169 281 224 2,674 2,030 251 241 2,522 A 829 1 — 830 810 1 — 811 A- 622 4 — 626 653 5 — 658 B++ 2 — 2 4 2 — 3 5 Below B++ 22 — — 22 22 — — 22 Total Rated by AM Best 5,915 286 226 6,427 5,915 257 244 6,416 Mandatory (Assigned) and Voluntary Risk Pools 205 — — 205 208 — — 208 Captives 402 — — 402 353 — — 353 Other not rated companies 176 5 — 181 226 4 — 230 Gross Reinsurance Recoverables 6,698 291 226 7,215 6,702 261 244 7,207 Allowance for uncollectible reinsurance (72) (1) (2) (75) (100) (1) (2) (103) Net Reinsurance Recoverables $ 6,626 $ 290 $ 224 $ 7,140 $ 6,602 $ 260 $ 242 $ 7,104 Balances are considered past due when amounts that have been billed are not collected within contractually stipulated time periods, generally 30, 60 or 90 days. To manage reinsurer credit risk, a reinsurance security review committee evaluates the credit standing, financial performance, management and operational quality of each potential reinsurer. In placing reinsurance, the Company considers the nature of the risk reinsured, including the expected liability payout duration, and establishes limits tiered by reinsurer credit rating. Where its contracts permit, the Company secures future claim obligations with various forms of collateral or other credit enhancement, including irrevocable letters of credit, secured trusts, funds held accounts and group wide offsets. As part of its reinsurance recoverable review, the Company analyzes recent developments in commutation activity between reinsurers and cedants, recent trends in arbitration and litigation outcomes in disputes between cedants and reinsurers and the overall credit quality of the Company’s reinsurers. Due to the inherent uncertainties as to collection and the length of time before reinsurance recoverables become due, it is possible that future adjustments to the Company’s reinsurance recoverables, net of the allowance, could be required, which could have a material adverse effect on the Company’s consolidated results of operations or cash flows in a particular quarter or annual period. The allowance for uncollectible reinsurance comprises an ACL and an allowance for disputed balances. The ACL is estimated as the amount of reinsurance recoverables exposed to loss multiplied by estimated factors for the probability of default and the amount of loss given a default. The probability of default is assigned based on each reinsurer's credit rating, or a rating is estimated if no external rating is available. Credit ratings are reviewed on a quarterly basis and any significant changes are reflected in an updated estimate. The probability of default factors are historical insurer and reinsurer defaults for liabilities with similar durations to the reinsured liabilities as estimated through multiple economic cycles. Credit ratings are forward-looking and consider a variety of economic outcomes. The loss given default factors are based on a study of historical recovery rates for general creditors of corporations through multiple economic cycles or, in the case of purchased annuities funding structured settlements accounted for as reinsurance, historical recovery rates for annuity contract holders. As shown in the table above, a portion of the total gross reinsurance recoverable balance relates to the Company’s participation in various mandatory (assigned) and voluntary risk pools. Reinsurance recoverables due from pools are backed by the financial position of all insurance companies participating in the pools and the credit backing the reinsurance recoverable is not limited to the financial strength of each pool. The mandatory pools generally are funded through policy assessments or surcharges and if any participant in the pool defaults, remaining liabilities are apportioned among the other members. The Company's evaluation of the required ACL for reinsurance recoverables considers the current economic environment as well as macroeconomic scenarios similar to the approach used to estimate the ACL for mortgage loans. See Note 5 - Investments. Insurance companies, including reinsurers, are regulated and hold risk-based capital ("RBC") to mitigate the risk of loss due to economic factors and other risks. Non-U.S. reinsurers are either subject to a capital regime substantively equivalent to domestic insurers or we hold collateral to support collection of reinsurance recoverables. As a result, there is limited history of losses from insurer defaults. In 2024, the ACL was reduced due to a decrease in a previously established reserve for an A&E reinsurer that entered liquidation proceedings. Allowance for Uncollectible Reinsurance As of December 31, 2024 As of December 31, 2023 As of December 31, 2022 P&C beginning allowance for uncollectible reinsurance $ 100 $ 102 $ 96 Beginning allowance for disputed amounts 57 60 54 P&C beginning ACL 43 42 42 Current period provision (6) 3 — Current period gross write-offs (13) (2) — P&C ending ACL 24 43 42 Ending allowance for disputed amounts 48 57 60 P&C ending allowance for uncollectible reinsurance 72 100 102 Employee Benefits allowance for uncollectible reinsurance 1 1 1 Corporate allowance for uncollectible reinsurance 2 2 2 Total allowance for uncollectible reinsurance $ 75 $ 103 $ 105 Insurance Revenues Property and Casualty Insurance Revenue For the years ended December 31, Premiums Written 2024 2023 2022 Direct $ 17,622 $ 16,144 $ 14,891 Assumed 1,102 975 718 Ceded (1,775) (1,642) (1,490) Net $ 16,949 $ 15,477 $ 14,119 Premiums Earned Direct $ 16,915 $ 15,514 $ 14,328 Assumed 1,001 826 654 Ceded (1,742) (1,612) (1,462) Net $ 16,174 $ 14,728 $ 13,520 Employee Benefits Revenue For the years ended December 31, 2024 2023 2022 Gross earned premiums, fees and other considerations $ 6,576 $ 6,445 $ 5,988 Reinsurance assumed 166 174 175 Reinsurance ceded (127) (104) (106) Net earned premiums, fees and other considerations $ 6,615 $ 6,515 $ 6,057

Goodwill & Other Intangible Ass

Goodwill & Other Intangible Assets	12 Months Ended
	Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill & Other Intangible Assets	9. GOODWILL & OTHER INTANGIBLE ASSETS The carrying value of goodwill allocated to reportable segments and the corporate category as of both December 31, 2024 and 2023 was as follows: Carrying Value Business Insurance $ 659 Personal Insurance 119 Hartford Funds 180 Employee Benefits 723 Corporate [1] 230 Total $ 1,911 [1] The Corporate category includes goodwill that was acquired at a holding company level and not pushed down to a subsidiary within a reportable segment. Carrying value of goodwill within Corporate as of December 31, 2024 and 2023 includes $138 and $92 for the Employee Benefits and Hartford Funds reporting units, respectively. The annual goodwill assessment for The Hartford's reporting units was completed as of October 31, 2024 and 2023; all reporting units passed their annual impairment test with a significant margin and as a result there were no write-downs of goodwill. Other Intangible Assets As of December 31, 2024 As of December 31, 2023 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Amortized Intangible Assets: Customer relationships $ 636 $ (313) $ 323 $ 636 $ (269) $ 367 Marketing agreement with Aetna 16 (7) 9 16 (7) 9 Distribution Agreement 79 (75) 4 79 (72) 7 Distribution and Agency relationships & Other 340 (134) 206 340 (111) 229 Total Finite Life Intangibles 1,071 (529) 542 1,071 (459) 612 Total Indefinite Life Intangible Assets 95 95 95 95 Total Other Intangible Assets $ 1,166 $ (529) $ 637 $ 1,166 $ (459) $ 707 Expected Before Tax Amortization Expense for Acquired Intangibles as of December 31, 2024 Other Intangible Assets 2025 $ 71 2026 $ 70 2027 $ 68 2028 $ 64 2029 $ 62

Reserve for Unpaid Losses and L

Reserve for Unpaid Losses and Loss Adjustment Expenses	12 Months Ended
	Dec. 31, 2024
Liability for Unpaid Claims and Claims Adjustment Expense, Activity in Liability [Abstract]
Reserve for Unpaid Losses and Loss Adjustment Expenses	| PROPERTY & CASUALTY INSURANCE PRODUCT RESERVES, NET OF REINSURANCE Rollforward of Liabilities for Unpaid Losses and Loss Adjustment Expenses For the years ended December 31, 2024 2023 2022 Beginning liabilities for unpaid losses and loss adjustment expenses, gross $ 34,044 $ 33,083 $ 31,449 Reinsurance and other recoverables 6,696 6,465 6,081 Beginning liabilities for unpaid losses and loss adjustment expenses, net 27,348 26,618 25,368 Provision for unpaid losses and loss adjustment expenses Current accident year 10,305 9,538 8,577 Prior accident year development [1] (120) 10 36 Total provision for unpaid losses and loss adjustment expenses 10,185 9,548 8,613 Change in deferred gain on retroactive reinsurance included in other liabilities [1] 83 (194) (229) Payments Current accident year (2,765) (2,716) (2,424) Prior accident years (5,175) (5,926) (4,678) Total payments (7,940) (8,642) (7,102) Foreign currency adjustment (25) 18 (32) Ending liabilities for unpaid losses and loss adjustment expenses, net 29,651 27,348 26,618 Reinsurance and other recoverables 6,753 6,696 6,465 Ending liabilities for unpaid losses and loss adjustment expenses, gross $ 36,404 $ 34,044 $ 33,083 [1] Prior accident year development for the year ended December 31, 2024 includes a $145 benefit for amortization of a deferred gain under retroactive reinsurance accounting related to the Navigator's ADC as the Company began collecting recoveries of the ceded losses from National Indemnity Company ("NICO"), a subsidiary of Berkshire Hathaway Inc, during the period. Prior accident year development does not include the benefit of a portion of losses ceded under the A&E ADC, which, under retroactive reinsurance accounting, is deferred and is recognized over the period the ceded losses are recovered in cash from NICO. For additional information regarding the two adverse development cover reinsurance agreements, refer to Adverse Development Covers discussion below. Property and Casualty Insurance Products Reserves, Net of Reinsurance, that are Discounted For the years ended December 31, 2024 2023 2022 Liability for unpaid losses and loss adjustment expenses, at undiscounted amounts $ 1,184 $ 1,255 $ 1,343 Amount of discount 333 339 347 Carrying value of liability for unpaid losses and loss adjustment expenses $ 851 $ 916 $ 996 Discount accretion included in losses and loss adjustment expenses $ 44 $ 42 $ 36 Weighted average discount rate 2.80 % 2.74 % 2.71 % Range of discount rates 0.83 % - 14.03 % 0.83 % - 14.03 % 0.83 % - 14.03 % Reserves are discounted at rates in effect at the time claims were incurred, ranging from 0.83% for accident year 2020 to 14.03% for accident year 1981. The reserves recorded for the Company’s property and casualty insurance products at December 31, 2024 represent the Company’s best estimate of its ultimate liability for losses and loss adjustment expenses related to losses covered by policies written by the Company. However, because of the significant uncertainties surrounding reserves it is possible that management’s estimate of the ultimate liabilities for these claims may change and that the required adjustment to recorded reserves could exceed the currently recorded reserves by an amount that could be material to the Company’s results of operations or cash flows. Losses and loss adjustment expenses are also impacted by trends including frequency and severity as well as changes in the legislative and regulatory environment. In the case of the reserves for asbestos exposures, factors contributing to the high degree of uncertainty in the ultimate settlement of the liabilities gross of reinsurance include inadequate loss development patterns, plaintiffs’ expanding theories of liability, the risks inherent in major litigation, and inconsistent emerging legal doctrines. In the case of the reserves for environmental exposures before reinsurance, factors contributing to the high degree of uncertainty in gross reserves include expanding theories of liabilities and damages, the risks inherent in major litigation, inconsistent decisions concerning the existence and scope of coverage for environmental claims, and uncertainty as to the monetary amount being sought by the claimant from the insured. (Favorable) Unfavorable Prior Accident Year Development For the years ended December 31, 2024 2023 2022 Workers’ compensation $ (258) $ (236) $ (204) Workers’ compensation discount accretion 44 42 36 General liability 211 41 56 Marine (1) (2) 2 Package business (6) (24) (39) Commercial property (7) (7) (11) Professional liability (27) (2) (11) Bond (56) (27) (32) Assumed reinsurance 24 34 19 Commercial automobile liability 47 20 38 Personal automobile liability (30) — (14) Homeowners (28) (6) (1) Net asbestos and environmental reserves 141 — — Catastrophes (87) (87) (62) Uncollectible reinsurance (19) 13 3 Other reserve re-estimates, net 15 57 27 Prior accident year development, including full benefit for the ADC cession (37) (184) (193) Change in deferred gain on retroactive reinsurance included in other liabilities [1] (83) 194 229 Total prior accident year development $ (120) $ 10 $ 36 [1] The change in deferred gain on retroactive reinsurance for the year ended December 31, 2024, included a benefit for amortization of the Navigators ADC deferred gain of $145. The change in deferred gain for the years ended December 31, 2024, 2023 and 2022 also included $62, $194 and $229, respectively of adverse development on A&E reserves in excess of ceded premium paid. 2024 re-estimates of prior accident year reserves Workers’ compensation reserves were decreased within the 2016 to 2020 accident years primarily in small business (formerly "small commercial"), driven by lower than anticipated claim severity. In addition, the 2020 accident year includes a $48 reduction of COVID-19 related reserves driven by favorable claim count emergence. General liability reserves were increased primarily in response to a higher frequency of large losses in the 2015 to 2019 accident years. In addition, the incurred but not reported reserves for more recent accident years were increased as management has observed an increase in severity on reported claims above expectations and anticipates a higher claim severity trend on unreported claims. Reserves for sexual molestation and sexual abuse claims were increased for older accident years. Lastly, reserves for extra contractual liability claims and other miscellaneous run-off lines were reduced in response to recent favorable loss activity. Professional liability reserves decreased due to favorable development on directors and officers ("D&O") claims driven by the 2020 to 2022 accident years combined with favorable errors and omissions experience in the 2018 accident year, partially offset by deterioration in older accident years. Bond reserves decreased due to favorable development on commercial and contract surety and fidelity bonds, driven by accident years 2019 and prior. Assumed reinsurance reserves were increased due to higher reserve estimates in the Latin America surety and Latin America P&C businesses related to the 2020 to 2023 accident years. Commercial automobile liability reserves increased primarily due to adverse loss development within accident years 2022 and 2023, driven by higher severity than estimated. Personal automobile liability reserves were decreased primarily in response to better than anticipated accident years 2021 to 2023 severity for bodily injury liability claims and property damage liability. Homeowners reserves were decreased primarily due to favorable severity impacting accident years 2022 and 2023. Asbestos and environmental reserves were reviewed in fourth quarter 2024 resulting in a $203 increase in reserves before ADC reinsurance, including $167 for asbestos and $36 for environmental. The Company ceded to the A&E ADC $62, which is accounted for as a deferred gain on retroactive reinsurance, representing the amount of losses ceded to the ADC in excess of ceded premium paid. For additional information related to the adverse development cover with NICO, see the Adverse Development Covers section below and Note 14 - Commitments and Contingencies. Catastrophes reserves were decreased primarily within Business Insurance driven by a reduction in reserves in accident years 2020 to 2022 related to favorable emergence related to various hail events, as well as favorable development in both Business Insurance and Personal Insurance in accident year 2022 related to Hurricane Ian. Uncollectible reinsurance was decreased due to a reduction in a previously established reserve for an A&E reinsurer that entered into liquidation proceedings. Other reserve re-estimates, net, were increased primarily due to an increase in unallocated loss adjustment expenses ("ULAE") reserves within P&C Other Operations driven by an increase in gross asbestos and environmental reserves and an increase in reserves related to unfavorable development from participation in involuntary market pools environmental reserves, partially offset by a decrease in reserves due to lower severity than expected on personal automobile physical damage for accident year 2023. 2023 re-estimates of prior accident year reserves Workers’ compensation reserves were decreased within the 2014 to 2020 accident years primarily in small business, driven by lower than previously estimated claim severity. In addition, the majority of the 2020 accident year relates to a $38 reduction of COVID-19 related reserves. General liability reserves were increased driven by higher frequency and estimated cost to settle large individual claims for the 2016 to 2019 accident years, partially offset by a decrease in reserves for the 2020 accident year due to favorable experience. In addition, reserves for sexual molestation and sexual abuse claims were increased for older accident years. Also included was a decrease in reserves for extra contractual liability claims and other miscellaneous run-off lines. Package business reserves decreased primarily due to lower than previously estimated property severity for accident year 2019 and 2021. Package liability is flat overall with reserve increases related to higher severity across multiple accident years offset by improvement in accident year 2020 due to favorable claim count emergence. Commercial property reserves decreased primarily due to favorable development for accident years 2018 and 2021. In accident year 2022, unfavorable development in middle & large business (formerly "middle & large commercial") was offset by favorable development in global specialty. Professional liability reserves decreased modestly due to favorable development on directors and officers claims driven by the 2020 and 2021 accident years, partially offset by deterioration in 2019 and prior accident years experience across errors and omissions and other claims. Bond reserves decreased primarily due to improvement in fidelity in 2013 and prior accident years, as well as improvement in contract surety in 2019 and prior accident years, partially offset by unfavorable development for 2013 and prior accident years related to customs bonds. Assumed reinsurance reserves were increased due to higher reserve estimates in the Latin America casualty and surety business. Commercial automobile liability reserves increased primarily due to adverse loss development from elevated large loss frequency and severity pressures within middle & large business for accident year 2022, as well as unfavorable experience in accident year 2019, partly offset by favorable development in accident years 2020 and 2021. Personal automobile liability reserves were flat as increases for accident year 2022 from higher estimated severity and increasing attorney representation rates were fully offset by decreases, primarily within accident years 2019 to 2021, due to lower estimated severity. Asbestos and environmental reserves were reviewed in fourth quarter 2023 resulting in a $194 increase in reserves before ADC reinsurance, including $156 for asbestos and $38 for environmental. The Company recognized a $194 deferred gain on retroactive reinsurance, representing the amount of losses ceded to the ADC in excess of ceded premium paid. For additional information related to the adverse development cover with NICO, see the Adverse Development Covers section below and Note 14 - Commitments and Contingencies. Catastrophes reserves were decreased primarily within Business Insurance driven by a reduction in reserves in accident year 2022 for Hurricane Ian and accident year 2021 for Hurricane Ida. Uncollectible reinsurance was increased primarily in Business Insurance related to a captive reinsurer and, to a lesser extent, an increase in reserves for potential collection disputes and credit concerns. Other reserve re-estimates, net, were increased primarily due to an increase in ULAE reserves within P&C Other Operations driven by an increase in gross asbestos and environmental reserves, as well as unfavorable development from participation in involuntary market pools, and increased automobile physical damage severity. 2022 re-estimates of prior accident year reserves Workers’ compensation reserves were decreased for the 2014 through 2018 accident years, predominately within small business, and to a lesser extent in middle & large business, driven by lower than previously estimated claim severity and, to a lesser extent, a $14 reduction of COVID-19 related claims from 2020. General liability reserves were increased, driven by an increase in the estimated cost to settle large individual claims in middle & large business for the 2016 to 2019 accident years, an increase in excess casualty and environmental in recent accident years, and increases in primary construction on older accident years, partially offset by a decrease in reserves for other mass torts. Package business reserves decreased due to lower estimated severity and lower estimated loss adjustment expenses for accident years 2018 and prior, and a reduction in property reserves for the 2020 and 2021 accident years. Commercial property reserves were decreased primarily due to favorable development for the 2020 accident year in middle & large business related to COVID-19 claims. Professional liability reserves were decreased primarily due to favorable development on D&O claims for the 2018 to 2020 accident years and on errors and omissions claims for the 2013 to 2017 accident years, partially offset by large losses related to 2018 and prior accident years for primary and excess D&O claims. Bond reserves were decreased primarily in contract surety due to favorable development on older accident years. Assumed reinsurance reserves were increased primarily due to higher reserve estimates for syndicate property claims, including higher expected COVID-19 property losses in the 2020 accident year and increased reserves for international agriculture related to drought claims. Also contributing were reserve increases for Latin America P&C and specialty casualty business in recent accident years. Automobile liability reserves were decreased in Personal Insurance principally due to lower estimated severity on AARP Direct claims, primarily within accident years 2015 to 2020 and were increased in Business Insurance principally due to a higher number of large claims in accident years 2017 to 2019, along with decreasing settlement rates and increasing attorney rep rates. Asbestos and environmental reserves were reviewed in fourth quarter 2022 resulting in a $229 increase in reserves before ADC reinsurance, including $162 for asbestos and $67 for environmental. The Company recognized a $229 deferred gain on retroactive reinsurance, representing the amount of losses ceded to the ADC in excess of ceded premium paid. For additional information related to the adverse development cover with NICO, see the Adverse Development Covers section below and Note 14 - Commitments and Contingencies. Catastrophes reserves were decreased in both Business Insurance and Personal Insurance with the largest reduction related to 2019 and 2020 wind and hail events. Other reserve re-estimates, net, were increased primarily due to an increase in ULAE reserves within P&C Other Operations driven by an increase in gross asbestos and environmental reserves, as well as unfavorable development from participation in involuntary market pools, and increased automobile physical damage severity. Settlement Agreement with Boy Scouts of America On February 14, 2022, the Company executed a final settlement agreement (the “Settlement”) with the Boy Scouts of America ("BSA"), the Local Councils, and the attorneys representing a majority of the alleged victims, pursuant to which The Hartford agreed to pay $787 for sexual molestation and sexual abuse claims associated with liability policies issued by various Hartford Writing Companies in the 1970s and early 1980s. In exchange for its payment, the Company receives a complete release of its policies issued to BSA and the Local Councils, as well as an injunction against further abuse claims involving BSA. All conditions precedent to the Settlement have been satisfied, including approval by the bankruptcy court and the district court, and on April 20, 2023, The Hartford paid the Settlement amount of $787. Certain objecting parties have appealed the district court’s ruling and that appeal is pending before the Third Circuit. If the court approvals for the BSA’s plan of reorganization are not affirmed on appeal, it is possible that adverse outcomes, if any, could have a material adverse effect on the Company’s operating results. Adverse Development Covers The Company has an adverse development cover reinsurance agreement with NICO, a subsidiary of Berkshire Hathaway Inc., to reinsure loss development after 2016 on substantially all of the Company’s asbestos and environmental reserves (the “A&E ADC”). Under the A&E ADC, the Company paid a reinsurance premium of $650 for NICO to assume adverse net loss reserve development up to $1.5 billion above the Company’s existing net A&E reserves as of December 31, 2016 of approximately $1.7 billion including reserves for A&E exposure for accident years prior to 1986 that are reported in Property & Casualty Other Operations ("Run-off A&E") and reserves for A&E exposure for accident years 1986 and subsequent from policies underwritten prior to 2016 that are reported in ongoing Business Insurance and Personal Insurance. The $650 reinsurance premium was placed into a collateral trust account as security for NICO’s claim payment obligations to the Company. The Company has retained the risk of collection on amounts due from other third-party reinsurers and continues to be responsible for claims handling and other administrative services, subject to certain conditions. The A&E ADC covered substantially all the Company’s A&E reserve development up to the reinsurance limit. Under retroactive reinsurance accounting, net adverse A&E reserve development after December 31, 2016 results in an offsetting reinsurance recoverable up to the $1.5 billion limit. Cumulative ceded losses up to the $650 reinsurance premium paid have been recognized as a dollar-for-dollar offset to direct losses incurred. Cumulative ceded losses exceeding the $650 reinsurance premium paid result in a deferred gain. As of December 31, 2024, the Company has incurred $1.5 billion in cumulative adverse development on asbestos and environmental reserves that have been ceded under the A&E ADC treaty with NICO with no available limit remaining. As such, no remaining coverage is available for any future adverse net reserve development, which may be significant. The Company has recorded a $850 deferred gain within other liabilities, representing the difference between the reinsurance recoverable of $1.5 billion and ceded premium paid of $650. Recoveries from NICO will be collected once the Company has paid cumulative losses in excess of the $1.7 billion attachment point. T he deferred gain will be recognized over the claim settlement period in the proportion of the amount of cumulative ceded losses collected from the reinsurer to the estimated ultimate reinsurance recoveries. Immediately after closing on the acquisition of Navigators Group, effective May 23, 2019, the Company purchased the Navigators ADC, an aggregate excess of loss reinsurance agreement covering adverse reserve development, from NICO on behalf of Navigators Insurance Company and certain of its affiliates (collectively, “Navigators Insurers"). Under the Navigators ADC, the Navigators Insurers paid NICO a reinsurance premium of $91 in exchange for reinsurance coverage of $300 of adverse net loss reserve development that attaches $100 above the Navigators Insurers' existing net loss and allocated loss adjustment reserves as of December 31, 2018 subject to the treaty of $1.816 billion for accidents and losses prior to December 31, 2018. As of December 31, 2024, the Company has recorded a reinsurance recoverable under the Navigators ADC of $91 as estimated cumulative loss development on the 2018 and prior accident year reserves has exhausted the treaty limit. While the reinsurance recoverable is $91, the Company previously recorded a $209 cumulative deferred gain within other liabilities since, under retroactive reinsurance accounting, ceded losses in excess of the $91 of ceded premium paid must be recognized as a deferred gain. During 2024, the Company collected recoveries from NICO under the Navigators ADC and as a result amortized $145 of the $209 deferred gain within benefits, losses and loss adjustment expenses in the Consolidated Statements of Operations. As there were no collected recoveries during the years ended December 31, 2023, and December 31, 2022, there were no changes to the deferred gain in those years. As of December 31, 2024, and December 31, 2023, the deferred gain on the Navigators ADC was $64 and $209, respectively, and is included in other liabilities on the Consolidated Balance Sheets. Reconciliation of Loss Development to Liability for Unpaid Losses and Loss Adjustment Expenses As of December 31, 2024 Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance Subtotal Reserve Line Cumulative Incurred for Accident Years Displayed in Triangles Cumulative Paid for Accident Years Displayed in Triangles Unpaid for Accident Years not Displayed in Triangles Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance Discount Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance Reinsurance and Other Recoverables Liability for Unpaid Losses and Loss Adjustment Expenses Workers' compensation $ 18,389 $ (9,665) $ 3,836 $ 419 $ (319) $ 12,660 $ 1,721 $ 14,381 General liability 9,416 (4,177) 494 202 — 5,935 1,230 7,165 Marine 1,427 (1,114) 15 15 — 343 244 587 Package business 8,630 (6,279) 109 130 — 2,590 31 2,621 Commercial property 4,244 (3,676) 13 31 — 612 299 911 Commercial automobile liability 4,606 (3,106) 16 38 — 1,554 113 1,667 Commercial automobile physical damage 239 (213) 4 1 — 31 — 31 Professional liability 3,042 (1,567) 55 47 — 1,577 611 2,188 Bond 667 (276) 19 33 — 443 14 457 Assumed Reinsurance 2,107 (1,356) — 7 — 758 30 788 Personal automobile liability 10,862 (9,240) 31 74 — 1,727 18 1,745 Personal automobile physical damage 1,640 (1,574) 7 5 — 78 — 78 Homeowners 5,876 (5,521) 6 42 — 403 5 408 Other ongoing business 168 7 (14) 161 356 517 Asbestos and environmental [1] 315 — — 315 2,038 2,353 Other operations [1] 293 171 — 464 43 507 Total P&C $ 71,145 $ (47,764) $ 5,381 $ 1,222 $ (333) $ 29,651 $ 6,753 $ 36,404 [1] Asbestos and environmental and other operations include asbestos, environmental and other latent exposures not foreseen when coverages were written, including, but not limited to, potential liability for pharmaceutical products, silica, talcum powder, head injuries, lead paint, construction defects, sexual molestation and sexual abuse and other long-tail liabilities. These reserve lines do not have significant paid or incurred loss development for the most recent ten accident years and therefore do not have loss development displayed in triangles. The reserve lines in the above table and the loss triangles that follow represent the significant lines of business for which the Company regularly reviews the appropriateness of reserve levels. These reserve lines differ from the reserve lines reported on a statutory basis, as prescribed by the National Association of Insurance Commissioners ("NAIC"). The cumulative incurred losses displayed in the above table include the full reinsurance benefit of ceding $300 of losses to the Navigators ADC even though $64 of that benefit has been recorded as a deferred gain within other liabilities. The $300 of Navigators Insurers losses ceded to the Navigators ADC and reflected in the following triangles include $95 for professional liability, $105 for general liability, $38 for marine, $27 for assumed reinsurance, $14 for commercial automobile, $3 for commercial property, and $1 for bond. The triangles do not include $17 of losses ceded to the Navigators ADC related to older accident years and lines of business not in the triangles. The following loss triangles present historical loss development for incurred and paid claims by accident year, including loss development on Navigators Insurers reserves prior to and after the May 23, 2019 acquisition date. Because the loss triangles include pre-acquisition date changes in ultimate incurred loss estimates for Navigators Insurers’ reserves, changes in reserve development evident in the incurred loss triangles may differ from prior accident year development ("PYD") recorded by the Company as shown in the (Favorable) Unfavorable Prior Accident Year Development table above as that only includes changes in Navigators Insurers’ reserves post acquisition. In addition, the incurred loss triangles include reserve development on both catastrophe and non-catastrophe claims whereas the (Favorable) Unfavorable Prior Accident Year Development table above shows the total amount of catastrophe reserve development across all lines of business on a single line. Triangles are limited to the number of years for which claims incurred typically remain outstanding, not exceeding ten years. Short-tail lines, which represent claims generally expected to be paid within a few years, have three years of claim development displayed. IBNR reserves shown in loss triangles include reserves for incurred but not reported claims as well as reserves for expected development on reported claims. Incurred and cumulative paid losses in currencies other than the U.S. dollar have been converted into U.S. dollars using the exchange rates as of December 31, 2024. Workers' Compensation Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 IBNR Claims 2015 $ 1,873 $ 1,835 $ 1,801 $ 1,724 $ 1,714 $ 1,699 $ 1,667 $ 1,645 $ 1,625 $ 1,625 $ 329 114,700 2016 1,772 1,772 1,780 1,767 1,748 1,708 1,670 1,634 1,621 331 112,747 2017 1,862 1,869 1,840 1,822 1,757 1,665 1,635 1,597 392 112,274 2018 1,916 1,917 1,915 1,904 1,870 1,836 1,798 464 120,076 2019 1,937 1,935 1,934 1,934 1,899 1,864 528 121,158 2020 1,865 1,864 1,849 1,808 1,712 601 92,347 2021 1,831 1,832 1,831 1,831 675 103,229 2022 2,000 2,001 2,001 819 114,189 2023 2,166 2,166 1,171 117,297 2024 2,174 1,536 109,521 Total $ 18,389 Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2015 $ 261 $ 576 $ 778 $ 909 $ 1,004 $ 1,068 $ 1,117 $ 1,151 $ 1,179 $ 1,200 2016 255 579 779 908 1,003 1,064 1,110 1,145 1,173 2017 261 575 778 900 977 1,035 1,087 1,118 2018 283 624 837 983 1,090 1,170 1,215 2019 291 637 856 1,007 1,129 1,204 2020 223 507 695 850 939 2021 254 562 780 920 2022 293 649 910 2023 286 677 2024 309 Total $ 9,665 General Liability Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 IBNR Claims 2015 $ 556 $ 560 $ 554 $ 594 $ 633 $ 647 $ 637 $ 647 $ 641 $ 656 $ 60 16,903 2016 613 583 607 632 632 620 636 670 692 68 17,989 2017 626 614 613 615 613 615 657 690 82 17,581 2018 692 669 697 703 728 751 816 167 19,019 2019 822 826 821 839 859 876 190 18,871 2020 938 922 922 873 857 363 14,574 2021 1,002 991 983 1,000 493 12,839 2022 1,116 1,110 1,167 746 12,673 2023 1,219 1,230 989 10,854 2024 1,432 1,366 7,290 Total $ 9,416 Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2015 $ 10 $ 55 $ 156 $ 278 $ 409 $ 477 $ 524 $ 547 $ 564 $ 569 2016 12 52 131 283 368 446 513 564 596 2017 15 67 156 255 344 441 506 553 2018 21 83 177 288 409 512 595 2019 29 100 192 339 501 613 2020 45 110 202 308 432 2021 34 115 209 394 2022 26 134 281 2023 17 128 2024 16 Total $ 4,177 Marine Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 IBNR Claims 2015 $ 158 $ 146 $ 146 $ 148 $ 133 $ 138 $ 139 $ 142 $ 140 $ 139 $ 1 10,559 2016 139 142 137 147 149 146 148 158 157 — 13,811 2017 153 173 160 159 165 167 174 172 — 16,235 2018 131 146 141 146 152 156 155 (5) 10,812 2019 139 135 134 129 127 127 (3) 7,261 2020 145 137 134 137 142 7 5,261 2021 127 127 119 127 15 5,357 2022 140 132 130 22 5,306 2023 134 129 39 4,674 2024 149 83 3,735 Total $ 1,427 [1] Contributing to the negative IBNR reserves for some accident years is a lag in the timing of expected reinsurance recoveries under the Navigators ADC with NICO. Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2015 $ 40 $ 85 $ 116 $ 125 $ 133 $ 139 $ 140 $ 142 $ 142 $ 141 2016 35 80 105 122 131 140 143 146 141 2017 47 106 133 143 150 161 170 167 2018 33 94 126 135 142 159 151 2019 34 80 96 105 115 120 2020 31 68 90 99 114 2021 25 63 87 101 2022 27 72 89 2023 22 58 2024 32 Total $ 1,114 Package Business Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 IBNR Claims 2015 $ 582 $ 588 $ 585 $ 583 $ 588 $ 581 $ 567 $ 564 $ 564 $ 570 $ 17 42,479 2016 655 638 632 625 611 595 591 590 582 24 44,381 2017 695 702 692 657 644 637 640 638 33 46,958 2018 719 724 688 667 655 654 671 46 45,361 2019 813 769 749 744 747 761 72 43,955 2020 915 893 877 837 828 101 62,964 2021 946 954 958 958 150 47,755 2022 1,038 1,039 1,043 215 47,134 2023 1,250 1,223 378 46,364 2024 1,356 750 42,172 Total $ 8,630 Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2015 $ 212 $ 332 $ 383 $ 445 $ 486 $ 505 $ 513 $ 530 $ 542 $ 549 2016 225 353 410 465 500 521 540 545 549 2017 235 372 447 496 534 561 578 593 2018 237 402 451 498 537 571 609 2019 254 413 488 571 626 666 2020 326 493 573 648 699 2021 368 556 650 746 2022 319 633 728 2023 453 725 2024 415 Total $ 6,279 Commercial Property Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 IBNR Claims 2015 $ 298 $ 301 $ 302 $ 301 $ 305 $ 304 $ 301 $ 301 $ 301 $ 299 $ — 20,977 2016 405 419 399 406 408 408 405 405 405 — 23,927 2017 577 516 456 438 440 438 439 438 2 24,627 2018 450 436 423 403 400 393 393 2 21,821 2019 480 439 418 420 421 420 (1) 20,981 2020 501 469 440 438 437 49 20,529 2021 531 500 463 434 15 18,283 2022 497 481 475 48 17,446 2023 448 424 86 17,003 2024 519 164 15,209 Total $ 4,244 Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2015 $ 179 $ 257 $ 284 $ 296 $ 301 $ 303 $ 302 $ 302 $ 301 $ 300 2016 215 342 378 395 401 406 406 407 406 2017 229 378 411 427 432 438 440 441 2018 188 344 378 385 394 394 394 2019 215 351 383 405 407 410 2020 221 336 355 367 373 2021 241 383 403 412 2022 180 369 412 2023 199 300 2

Reserve for Future Policy Benef

Reserve for Future Policy Benefits	12 Months Ended
	Dec. 31, 2024
Insurance Loss Reserves [Abstract]
Reserve for Future Policy Benefits	| PROPERTY & CASUALTY INSURANCE PRODUCT RESERVES, NET OF REINSURANCE Rollforward of Liabilities for Unpaid Losses and Loss Adjustment Expenses For the years ended December 31, 2024 2023 2022 Beginning liabilities for unpaid losses and loss adjustment expenses, gross $ 34,044 $ 33,083 $ 31,449 Reinsurance and other recoverables 6,696 6,465 6,081 Beginning liabilities for unpaid losses and loss adjustment expenses, net 27,348 26,618 25,368 Provision for unpaid losses and loss adjustment expenses Current accident year 10,305 9,538 8,577 Prior accident year development [1] (120) 10 36 Total provision for unpaid losses and loss adjustment expenses 10,185 9,548 8,613 Change in deferred gain on retroactive reinsurance included in other liabilities [1] 83 (194) (229) Payments Current accident year (2,765) (2,716) (2,424) Prior accident years (5,175) (5,926) (4,678) Total payments (7,940) (8,642) (7,102) Foreign currency adjustment (25) 18 (32) Ending liabilities for unpaid losses and loss adjustment expenses, net 29,651 27,348 26,618 Reinsurance and other recoverables 6,753 6,696 6,465 Ending liabilities for unpaid losses and loss adjustment expenses, gross $ 36,404 $ 34,044 $ 33,083 [1] Prior accident year development for the year ended December 31, 2024 includes a $145 benefit for amortization of a deferred gain under retroactive reinsurance accounting related to the Navigator's ADC as the Company began collecting recoveries of the ceded losses from National Indemnity Company ("NICO"), a subsidiary of Berkshire Hathaway Inc, during the period. Prior accident year development does not include the benefit of a portion of losses ceded under the A&E ADC, which, under retroactive reinsurance accounting, is deferred and is recognized over the period the ceded losses are recovered in cash from NICO. For additional information regarding the two adverse development cover reinsurance agreements, refer to Adverse Development Covers discussion below. Property and Casualty Insurance Products Reserves, Net of Reinsurance, that are Discounted For the years ended December 31, 2024 2023 2022 Liability for unpaid losses and loss adjustment expenses, at undiscounted amounts $ 1,184 $ 1,255 $ 1,343 Amount of discount 333 339 347 Carrying value of liability for unpaid losses and loss adjustment expenses $ 851 $ 916 $ 996 Discount accretion included in losses and loss adjustment expenses $ 44 $ 42 $ 36 Weighted average discount rate 2.80 % 2.74 % 2.71 % Range of discount rates 0.83 % - 14.03 % 0.83 % - 14.03 % 0.83 % - 14.03 % Reserves are discounted at rates in effect at the time claims were incurred, ranging from 0.83% for accident year 2020 to 14.03% for accident year 1981. The reserves recorded for the Company’s property and casualty insurance products at December 31, 2024 represent the Company’s best estimate of its ultimate liability for losses and loss adjustment expenses related to losses covered by policies written by the Company. However, because of the significant uncertainties surrounding reserves it is possible that management’s estimate of the ultimate liabilities for these claims may change and that the required adjustment to recorded reserves could exceed the currently recorded reserves by an amount that could be material to the Company’s results of operations or cash flows. Losses and loss adjustment expenses are also impacted by trends including frequency and severity as well as changes in the legislative and regulatory environment. In the case of the reserves for asbestos exposures, factors contributing to the high degree of uncertainty in the ultimate settlement of the liabilities gross of reinsurance include inadequate loss development patterns, plaintiffs’ expanding theories of liability, the risks inherent in major litigation, and inconsistent emerging legal doctrines. In the case of the reserves for environmental exposures before reinsurance, factors contributing to the high degree of uncertainty in gross reserves include expanding theories of liabilities and damages, the risks inherent in major litigation, inconsistent decisions concerning the existence and scope of coverage for environmental claims, and uncertainty as to the monetary amount being sought by the claimant from the insured. (Favorable) Unfavorable Prior Accident Year Development For the years ended December 31, 2024 2023 2022 Workers’ compensation $ (258) $ (236) $ (204) Workers’ compensation discount accretion 44 42 36 General liability 211 41 56 Marine (1) (2) 2 Package business (6) (24) (39) Commercial property (7) (7) (11) Professional liability (27) (2) (11) Bond (56) (27) (32) Assumed reinsurance 24 34 19 Commercial automobile liability 47 20 38 Personal automobile liability (30) — (14) Homeowners (28) (6) (1) Net asbestos and environmental reserves 141 — — Catastrophes (87) (87) (62) Uncollectible reinsurance (19) 13 3 Other reserve re-estimates, net 15 57 27 Prior accident year development, including full benefit for the ADC cession (37) (184) (193) Change in deferred gain on retroactive reinsurance included in other liabilities [1] (83) 194 229 Total prior accident year development $ (120) $ 10 $ 36 [1] The change in deferred gain on retroactive reinsurance for the year ended December 31, 2024, included a benefit for amortization of the Navigators ADC deferred gain of $145. The change in deferred gain for the years ended December 31, 2024, 2023 and 2022 also included $62, $194 and $229, respectively of adverse development on A&E reserves in excess of ceded premium paid. 2024 re-estimates of prior accident year reserves Workers’ compensation reserves were decreased within the 2016 to 2020 accident years primarily in small business (formerly "small commercial"), driven by lower than anticipated claim severity. In addition, the 2020 accident year includes a $48 reduction of COVID-19 related reserves driven by favorable claim count emergence. General liability reserves were increased primarily in response to a higher frequency of large losses in the 2015 to 2019 accident years. In addition, the incurred but not reported reserves for more recent accident years were increased as management has observed an increase in severity on reported claims above expectations and anticipates a higher claim severity trend on unreported claims. Reserves for sexual molestation and sexual abuse claims were increased for older accident years. Lastly, reserves for extra contractual liability claims and other miscellaneous run-off lines were reduced in response to recent favorable loss activity. Professional liability reserves decreased due to favorable development on directors and officers ("D&O") claims driven by the 2020 to 2022 accident years combined with favorable errors and omissions experience in the 2018 accident year, partially offset by deterioration in older accident years. Bond reserves decreased due to favorable development on commercial and contract surety and fidelity bonds, driven by accident years 2019 and prior. Assumed reinsurance reserves were increased due to higher reserve estimates in the Latin America surety and Latin America P&C businesses related to the 2020 to 2023 accident years. Commercial automobile liability reserves increased primarily due to adverse loss development within accident years 2022 and 2023, driven by higher severity than estimated. Personal automobile liability reserves were decreased primarily in response to better than anticipated accident years 2021 to 2023 severity for bodily injury liability claims and property damage liability. Homeowners reserves were decreased primarily due to favorable severity impacting accident years 2022 and 2023. Asbestos and environmental reserves were reviewed in fourth quarter 2024 resulting in a $203 increase in reserves before ADC reinsurance, including $167 for asbestos and $36 for environmental. The Company ceded to the A&E ADC $62, which is accounted for as a deferred gain on retroactive reinsurance, representing the amount of losses ceded to the ADC in excess of ceded premium paid. For additional information related to the adverse development cover with NICO, see the Adverse Development Covers section below and Note 14 - Commitments and Contingencies. Catastrophes reserves were decreased primarily within Business Insurance driven by a reduction in reserves in accident years 2020 to 2022 related to favorable emergence related to various hail events, as well as favorable development in both Business Insurance and Personal Insurance in accident year 2022 related to Hurricane Ian. Uncollectible reinsurance was decreased due to a reduction in a previously established reserve for an A&E reinsurer that entered into liquidation proceedings. Other reserve re-estimates, net, were increased primarily due to an increase in unallocated loss adjustment expenses ("ULAE") reserves within P&C Other Operations driven by an increase in gross asbestos and environmental reserves and an increase in reserves related to unfavorable development from participation in involuntary market pools environmental reserves, partially offset by a decrease in reserves due to lower severity than expected on personal automobile physical damage for accident year 2023. 2023 re-estimates of prior accident year reserves Workers’ compensation reserves were decreased within the 2014 to 2020 accident years primarily in small business, driven by lower than previously estimated claim severity. In addition, the majority of the 2020 accident year relates to a $38 reduction of COVID-19 related reserves. General liability reserves were increased driven by higher frequency and estimated cost to settle large individual claims for the 2016 to 2019 accident years, partially offset by a decrease in reserves for the 2020 accident year due to favorable experience. In addition, reserves for sexual molestation and sexual abuse claims were increased for older accident years. Also included was a decrease in reserves for extra contractual liability claims and other miscellaneous run-off lines. Package business reserves decreased primarily due to lower than previously estimated property severity for accident year 2019 and 2021. Package liability is flat overall with reserve increases related to higher severity across multiple accident years offset by improvement in accident year 2020 due to favorable claim count emergence. Commercial property reserves decreased primarily due to favorable development for accident years 2018 and 2021. In accident year 2022, unfavorable development in middle & large business (formerly "middle & large commercial") was offset by favorable development in global specialty. Professional liability reserves decreased modestly due to favorable development on directors and officers claims driven by the 2020 and 2021 accident years, partially offset by deterioration in 2019 and prior accident years experience across errors and omissions and other claims. Bond reserves decreased primarily due to improvement in fidelity in 2013 and prior accident years, as well as improvement in contract surety in 2019 and prior accident years, partially offset by unfavorable development for 2013 and prior accident years related to customs bonds. Assumed reinsurance reserves were increased due to higher reserve estimates in the Latin America casualty and surety business. Commercial automobile liability reserves increased primarily due to adverse loss development from elevated large loss frequency and severity pressures within middle & large business for accident year 2022, as well as unfavorable experience in accident year 2019, partly offset by favorable development in accident years 2020 and 2021. Personal automobile liability reserves were flat as increases for accident year 2022 from higher estimated severity and increasing attorney representation rates were fully offset by decreases, primarily within accident years 2019 to 2021, due to lower estimated severity. Asbestos and environmental reserves were reviewed in fourth quarter 2023 resulting in a $194 increase in reserves before ADC reinsurance, including $156 for asbestos and $38 for environmental. The Company recognized a $194 deferred gain on retroactive reinsurance, representing the amount of losses ceded to the ADC in excess of ceded premium paid. For additional information related to the adverse development cover with NICO, see the Adverse Development Covers section below and Note 14 - Commitments and Contingencies. Catastrophes reserves were decreased primarily within Business Insurance driven by a reduction in reserves in accident year 2022 for Hurricane Ian and accident year 2021 for Hurricane Ida. Uncollectible reinsurance was increased primarily in Business Insurance related to a captive reinsurer and, to a lesser extent, an increase in reserves for potential collection disputes and credit concerns. Other reserve re-estimates, net, were increased primarily due to an increase in ULAE reserves within P&C Other Operations driven by an increase in gross asbestos and environmental reserves, as well as unfavorable development from participation in involuntary market pools, and increased automobile physical damage severity. 2022 re-estimates of prior accident year reserves Workers’ compensation reserves were decreased for the 2014 through 2018 accident years, predominately within small business, and to a lesser extent in middle & large business, driven by lower than previously estimated claim severity and, to a lesser extent, a $14 reduction of COVID-19 related claims from 2020. General liability reserves were increased, driven by an increase in the estimated cost to settle large individual claims in middle & large business for the 2016 to 2019 accident years, an increase in excess casualty and environmental in recent accident years, and increases in primary construction on older accident years, partially offset by a decrease in reserves for other mass torts. Package business reserves decreased due to lower estimated severity and lower estimated loss adjustment expenses for accident years 2018 and prior, and a reduction in property reserves for the 2020 and 2021 accident years. Commercial property reserves were decreased primarily due to favorable development for the 2020 accident year in middle & large business related to COVID-19 claims. Professional liability reserves were decreased primarily due to favorable development on D&O claims for the 2018 to 2020 accident years and on errors and omissions claims for the 2013 to 2017 accident years, partially offset by large losses related to 2018 and prior accident years for primary and excess D&O claims. Bond reserves were decreased primarily in contract surety due to favorable development on older accident years. Assumed reinsurance reserves were increased primarily due to higher reserve estimates for syndicate property claims, including higher expected COVID-19 property losses in the 2020 accident year and increased reserves for international agriculture related to drought claims. Also contributing were reserve increases for Latin America P&C and specialty casualty business in recent accident years. Automobile liability reserves were decreased in Personal Insurance principally due to lower estimated severity on AARP Direct claims, primarily within accident years 2015 to 2020 and were increased in Business Insurance principally due to a higher number of large claims in accident years 2017 to 2019, along with decreasing settlement rates and increasing attorney rep rates. Asbestos and environmental reserves were reviewed in fourth quarter 2022 resulting in a $229 increase in reserves before ADC reinsurance, including $162 for asbestos and $67 for environmental. The Company recognized a $229 deferred gain on retroactive reinsurance, representing the amount of losses ceded to the ADC in excess of ceded premium paid. For additional information related to the adverse development cover with NICO, see the Adverse Development Covers section below and Note 14 - Commitments and Contingencies. Catastrophes reserves were decreased in both Business Insurance and Personal Insurance with the largest reduction related to 2019 and 2020 wind and hail events. Other reserve re-estimates, net, were increased primarily due to an increase in ULAE reserves within P&C Other Operations driven by an increase in gross asbestos and environmental reserves, as well as unfavorable development from participation in involuntary market pools, and increased automobile physical damage severity. Settlement Agreement with Boy Scouts of America On February 14, 2022, the Company executed a final settlement agreement (the “Settlement”) with the Boy Scouts of America ("BSA"), the Local Councils, and the attorneys representing a majority of the alleged victims, pursuant to which The Hartford agreed to pay $787 for sexual molestation and sexual abuse claims associated with liability policies issued by various Hartford Writing Companies in the 1970s and early 1980s. In exchange for its payment, the Company receives a complete release of its policies issued to BSA and the Local Councils, as well as an injunction against further abuse claims involving BSA. All conditions precedent to the Settlement have been satisfied, including approval by the bankruptcy court and the district court, and on April 20, 2023, The Hartford paid the Settlement amount of $787. Certain objecting parties have appealed the district court’s ruling and that appeal is pending before the Third Circuit. If the court approvals for the BSA’s plan of reorganization are not affirmed on appeal, it is possible that adverse outcomes, if any, could have a material adverse effect on the Company’s operating results. Adverse Development Covers The Company has an adverse development cover reinsurance agreement with NICO, a subsidiary of Berkshire Hathaway Inc., to reinsure loss development after 2016 on substantially all of the Company’s asbestos and environmental reserves (the “A&E ADC”). Under the A&E ADC, the Company paid a reinsurance premium of $650 for NICO to assume adverse net loss reserve development up to $1.5 billion above the Company’s existing net A&E reserves as of December 31, 2016 of approximately $1.7 billion including reserves for A&E exposure for accident years prior to 1986 that are reported in Property & Casualty Other Operations ("Run-off A&E") and reserves for A&E exposure for accident years 1986 and subsequent from policies underwritten prior to 2016 that are reported in ongoing Business Insurance and Personal Insurance. The $650 reinsurance premium was placed into a collateral trust account as security for NICO’s claim payment obligations to the Company. The Company has retained the risk of collection on amounts due from other third-party reinsurers and continues to be responsible for claims handling and other administrative services, subject to certain conditions. The A&E ADC covered substantially all the Company’s A&E reserve development up to the reinsurance limit. Under retroactive reinsurance accounting, net adverse A&E reserve development after December 31, 2016 results in an offsetting reinsurance recoverable up to the $1.5 billion limit. Cumulative ceded losses up to the $650 reinsurance premium paid have been recognized as a dollar-for-dollar offset to direct losses incurred. Cumulative ceded losses exceeding the $650 reinsurance premium paid result in a deferred gain. As of December 31, 2024, the Company has incurred $1.5 billion in cumulative adverse development on asbestos and environmental reserves that have been ceded under the A&E ADC treaty with NICO with no available limit remaining. As such, no remaining coverage is available for any future adverse net reserve development, which may be significant. The Company has recorded a $850 deferred gain within other liabilities, representing the difference between the reinsurance recoverable of $1.5 billion and ceded premium paid of $650. Recoveries from NICO will be collected once the Company has paid cumulative losses in excess of the $1.7 billion attachment point. T he deferred gain will be recognized over the claim settlement period in the proportion of the amount of cumulative ceded losses collected from the reinsurer to the estimated ultimate reinsurance recoveries. Immediately after closing on the acquisition of Navigators Group, effective May 23, 2019, the Company purchased the Navigators ADC, an aggregate excess of loss reinsurance agreement covering adverse reserve development, from NICO on behalf of Navigators Insurance Company and certain of its affiliates (collectively, “Navigators Insurers"). Under the Navigators ADC, the Navigators Insurers paid NICO a reinsurance premium of $91 in exchange for reinsurance coverage of $300 of adverse net loss reserve development that attaches $100 above the Navigators Insurers' existing net loss and allocated loss adjustment reserves as of December 31, 2018 subject to the treaty of $1.816 billion for accidents and losses prior to December 31, 2018. As of December 31, 2024, the Company has recorded a reinsurance recoverable under the Navigators ADC of $91 as estimated cumulative loss development on the 2018 and prior accident year reserves has exhausted the treaty limit. While the reinsurance recoverable is $91, the Company previously recorded a $209 cumulative deferred gain within other liabilities since, under retroactive reinsurance accounting, ceded losses in excess of the $91 of ceded premium paid must be recognized as a deferred gain. During 2024, the Company collected recoveries from NICO under the Navigators ADC and as a result amortized $145 of the $209 deferred gain within benefits, losses and loss adjustment expenses in the Consolidated Statements of Operations. As there were no collected recoveries during the years ended December 31, 2023, and December 31, 2022, there were no changes to the deferred gain in those years. As of December 31, 2024, and December 31, 2023, the deferred gain on the Navigators ADC was $64 and $209, respectively, and is included in other liabilities on the Consolidated Balance Sheets. Reconciliation of Loss Development to Liability for Unpaid Losses and Loss Adjustment Expenses As of December 31, 2024 Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance Subtotal Reserve Line Cumulative Incurred for Accident Years Displayed in Triangles Cumulative Paid for Accident Years Displayed in Triangles Unpaid for Accident Years not Displayed in Triangles Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance Discount Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance Reinsurance and Other Recoverables Liability for Unpaid Losses and Loss Adjustment Expenses Workers' compensation $ 18,389 $ (9,665) $ 3,836 $ 419 $ (319) $ 12,660 $ 1,721 $ 14,381 General liability 9,416 (4,177) 494 202 — 5,935 1,230 7,165 Marine 1,427 (1,114) 15 15 — 343 244 587 Package business 8,630 (6,279) 109 130 — 2,590 31 2,621 Commercial property 4,244 (3,676) 13 31 — 612 299 911 Commercial automobile liability 4,606 (3,106) 16 38 — 1,554 113 1,667 Commercial automobile physical damage 239 (213) 4 1 — 31 — 31 Professional liability 3,042 (1,567) 55 47 — 1,577 611 2,188 Bond 667 (276) 19 33 — 443 14 457 Assumed Reinsurance 2,107 (1,356) — 7 — 758 30 788 Personal automobile liability 10,862 (9,240) 31 74 — 1,727 18 1,745 Personal automobile physical damage 1,640 (1,574) 7 5 — 78 — 78 Homeowners 5,876 (5,521) 6 42 — 403 5 408 Other ongoing business 168 7 (14) 161 356 517 Asbestos and environmental [1] 315 — — 315 2,038 2,353 Other operations [1] 293 171 — 464 43 507 Total P&C $ 71,145 $ (47,764) $ 5,381 $ 1,222 $ (333) $ 29,651 $ 6,753 $ 36,404 [1] Asbestos and environmental and other operations include asbestos, environmental and other latent exposures not foreseen when coverages were written, including, but not limited to, potential liability for pharmaceutical products, silica, talcum powder, head injuries, lead paint, construction defects, sexual molestation and sexual abuse and other long-tail liabilities. These reserve lines do not have significant paid or incurred loss development for the most recent ten accident years and therefore do not have loss development displayed in triangles. The reserve lines in the above table and the loss triangles that follow represent the significant lines of business for which the Company regularly reviews the appropriateness of reserve levels. These reserve lines differ from the reserve lines reported on a statutory basis, as prescribed by the National Association of Insurance Commissioners ("NAIC"). The cumulative incurred losses displayed in the above table include the full reinsurance benefit of ceding $300 of losses to the Navigators ADC even though $64 of that benefit has been recorded as a deferred gain within other liabilities. The $300 of Navigators Insurers losses ceded to the Navigators ADC and reflected in the following triangles include $95 for professional liability, $105 for general liability, $38 for marine, $27 for assumed reinsurance, $14 for commercial automobile, $3 for commercial property, and $1 for bond. The triangles do not include $17 of losses ceded to the Navigators ADC related to older accident years and lines of business not in the triangles. The following loss triangles present historical loss development for incurred and paid claims by accident year, including loss development on Navigators Insurers reserves prior to and after the May 23, 2019 acquisition date. Because the loss triangles include pre-acquisition date changes in ultimate incurred loss estimates for Navigators Insurers’ reserves, changes in reserve development evident in the incurred loss triangles may differ from prior accident year development ("PYD") recorded by the Company as shown in the (Favorable) Unfavorable Prior Accident Year Development table above as that only includes changes in Navigators Insurers’ reserves post acquisition. In addition, the incurred loss triangles include reserve development on both catastrophe and non-catastrophe claims whereas the (Favorable) Unfavorable Prior Accident Year Development table above shows the total amount of catastrophe reserve development across all lines of business on a single line. Triangles are limited to the number of years for which claims incurred typically remain outstanding, not exceeding ten years. Short-tail lines, which represent claims generally expected to be paid within a few years, have three years of claim development displayed. IBNR reserves shown in loss triangles include reserves for incurred but not reported claims as well as reserves for expected development on reported claims. Incurred and cumulative paid losses in currencies other than the U.S. dollar have been converted into U.S. dollars using the exchange rates as of December 31, 2024. Workers' Compensation Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 IBNR Claims 2015 $ 1,873 $ 1,835 $ 1,801 $ 1,724 $ 1,714 $ 1,699 $ 1,667 $ 1,645 $ 1,625 $ 1,625 $ 329 114,700 2016 1,772 1,772 1,780 1,767 1,748 1,708 1,670 1,634 1,621 331 112,747 2017 1,862 1,869 1,840 1,822 1,757 1,665 1,635 1,597 392 112,274 2018 1,916 1,917 1,915 1,904 1,870 1,836 1,798 464 120,076 2019 1,937 1,935 1,934 1,934 1,899 1,864 528 121,158 2020 1,865 1,864 1,849 1,808 1,712 601 92,347 2021 1,831 1,832 1,831 1,831 675 103,229 2022 2,000 2,001 2,001 819 114,189 2023 2,166 2,166 1,171 117,297 2024 2,174 1,536 109,521 Total $ 18,389 Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2015 $ 261 $ 576 $ 778 $ 909 $ 1,004 $ 1,068 $ 1,117 $ 1,151 $ 1,179 $ 1,200 2016 255 579 779 908 1,003 1,064 1,110 1,145 1,173 2017 261 575 778 900 977 1,035 1,087 1,118 2018 283 624 837 983 1,090 1,170 1,215 2019 291 637 856 1,007 1,129 1,204 2020 223 507 695 850 939 2021 254 562 780 920 2022 293 649 910 2023 286 677 2024 309 Total $ 9,665 General Liability Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 IBNR Claims 2015 $ 556 $ 560 $ 554 $ 594 $ 633 $ 647 $ 637 $ 647 $ 641 $ 656 $ 60 16,903 2016 613 583 607 632 632 620 636 670 692 68 17,989 2017 626 614 613 615 613 615 657 690 82 17,581 2018 692 669 697 703 728 751 816 167 19,019 2019 822 826 821 839 859 876 190 18,871 2020 938 922 922 873 857 363 14,574 2021 1,002 991 983 1,000 493 12,839 2022 1,116 1,110 1,167 746 12,673 2023 1,219 1,230 989 10,854 2024 1,432 1,366 7,290 Total $ 9,416 Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2015 $ 10 $ 55 $ 156 $ 278 $ 409 $ 477 $ 524 $ 547 $ 564 $ 569 2016 12 52 131 283 368 446 513 564 596 2017 15 67 156 255 344 441 506 553 2018 21 83 177 288 409 512 595 2019 29 100 192 339 501 613 2020 45 110 202 308 432 2021 34 115 209 394 2022 26 134 281 2023 17 128 2024 16 Total $ 4,177 Marine Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 IBNR Claims 2015 $ 158 $ 146 $ 146 $ 148 $ 133 $ 138 $ 139 $ 142 $ 140 $ 139 $ 1 10,559 2016 139 142 137 147 149 146 148 158 157 — 13,811 2017 153 173 160 159 165 167 174 172 — 16,235 2018 131 146 141 146 152 156 155 (5) 10,812 2019 139 135 134 129 127 127 (3) 7,261 2020 145 137 134 137 142 7 5,261 2021 127 127 119 127 15 5,357 2022 140 132 130 22 5,306 2023 134 129 39 4,674 2024 149 83 3,735 Total $ 1,427 [1] Contributing to the negative IBNR reserves for some accident years is a lag in the timing of expected reinsurance recoveries under the Navigators ADC with NICO. Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2015 $ 40 $ 85 $ 116 $ 125 $ 133 $ 139 $ 140 $ 142 $ 142 $ 141 2016 35 80 105 122 131 140 143 146 141 2017 47 106 133 143 150 161 170 167 2018 33 94 126 135 142 159 151 2019 34 80 96 105 115 120 2020 31 68 90 99 114 2021 25 63 87 101 2022 27 72 89 2023 22 58 2024 32 Total $ 1,114 Package Business Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 IBNR Claims 2015 $ 582 $ 588 $ 585 $ 583 $ 588 $ 581 $ 567 $ 564 $ 564 $ 570 $ 17 42,479 2016 655 638 632 625 611 595 591 590 582 24 44,381 2017 695 702 692 657 644 637 640 638 33 46,958 2018 719 724 688 667 655 654 671 46 45,361 2019 813 769 749 744 747 761 72 43,955 2020 915 893 877 837 828 101 62,964 2021 946 954 958 958 150 47,755 2022 1,038 1,039 1,043 215 47,134 2023 1,250 1,223 378 46,364 2024 1,356 750 42,172 Total $ 8,630 Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2015 $ 212 $ 332 $ 383 $ 445 $ 486 $ 505 $ 513 $ 530 $ 542 $ 549 2016 225 353 410 465 500 521 540 545 549 2017 235 372 447 496 534 561 578 593 2018 237 402 451 498 537 571 609 2019 254 413 488 571 626 666 2020 326 493 573 648 699 2021 368 556 650 746 2022 319 633 728 2023 453 725 2024 415 Total $ 6,279 Commercial Property Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 IBNR Claims 2015 $ 298 $ 301 $ 302 $ 301 $ 305 $ 304 $ 301 $ 301 $ 301 $ 299 $ — 20,977 2016 405 419 399 406 408 408 405 405 405 — 23,927 2017 577 516 456 438 440 438 439 438 2 24,627 2018 450 436 423 403 400 393 393 2 21,821 2019 480 439 418 420 421 420 (1) 20,981 2020 501 469 440 438 437 49 20,529 2021 531 500 463 434 15 18,283 2022 497 481 475 48 17,446 2023 448 424 86 17,003 2024 519 164 15,209 Total $ 4,244 Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2015 $ 179 $ 257 $ 284 $ 296 $ 301 $ 303 $ 302 $ 302 $ 301 $ 300 2016 215 342 378 395 401 406 406 407 406 2017 229 378 411 427 432 438 440 441 2018 188 344 378 385 394 394 394 2019 215 351 383 405 407 410 2020 221 336 355 367 373 2021 241 383 403 412 2022 180 369 412 2023 199 300 2

Other Policyholder Funds and Be

Other Policyholder Funds and Benefits Payable	12 Months Ended
	Dec. 31, 2024
Insurance Loss Reserves [Abstract]
Policyholder Account Balance Disclosure [Text Block]	12. OTHER POLICYHOLDER FUNDS AND BENEFITS PAYABLE Other policyholder funds and benefits payable of $614, $638 and $658 as of December 31, 2024, 2023 and 2022, respectively, included universal life long-duration contacts of $206, $223 and $232 as well as policyholder balances related to short-duration contracts of $408, $415 and $426. The universal life long-duration contacts presented in the table below were economically ceded to Prudential as part of the sale of the Company's former individual life business, which closed in 2013. Universal Life Long Duration Contracts Rollforward For the year ended December 31, 2024 2023 2022 Balance, beginning of year $ 223 $ 232 $ 253 Premiums Received 13 14 15 Policy Charges (23) (21) (23) Surrenders and Withdrawals (5) (6) (4) Benefit Payments (9) (6) (20) Interest Credited 7 10 11 Balance, End of Year $ 206 $ 223 $ 232 Weighted-average crediting rate 4.3 % 4.2 % 4.2 % Net Amount at Risk [1] $ 824 $ 917 $ 987 Cash Surrender Value $ 205 $ 221 $ 229 [1] Net amount at risk is defined as the current death benefit in excess of the current account value as of the balance sheet date. As of December 31, 2024, 2023 and 2022, universal life contracts of $205, $222 and $230, respectively, had crediting rates at their guaranteed minimums ranging from 4%-5%.

Debt

Debt	12 Months Ended
	Dec. 31, 2024
Debt Disclosure [Abstract]
Debt	13. DEBT The Company’s long-term debt securities are issued by Hartford Insurance Group, Inc. ("HIG Holding Company"), are unsecured obligations of HIG Holding Company, and rank on a parity with all other unsecured and unsubordinated indebtedness of HIG Holding Company. Debt is carried net of discount and issuance cost. Long-term Debt by Issuance As of December 31, 2024 2023 Revolving Credit Facilities $ — $ — Senior Notes and Debentures 2.8% Notes, due 2029 600 600 5.95% Notes, due 2036 300 300 6.625% Notes, due 2040 295 295 6.1% Notes, due 2041 409 409 6.625% Notes, due 2042 178 178 4.3% Notes, due 2043 300 300 4.4% Notes, due 2048 500 500 3.6% Notes, due 2049 800 800 2.9% Notes, due 2051 600 600 Junior Subordinated Debentures 3-Month term SOFR + 0.26161% + 2.125% Notes, due 2067 [1] 500 500 Total Notes and Debentures 4,482 4,482 Unamortized discount and debt issuance cost [2] (116) (120) Total Debt 4,366 4,362 Less: Current maturities — — Long-Term Debt $ 4,366 $ 4,362 [1] The Company has an interest rate swap agreement expiring February 15, 2027 to effectively convert the variable interest payments based on 3-month term Secured Overnight Financing Rate (“SOFR”) plus a spread adjustment of 0.26161% plus 2.125 for this debenture. [2] This amount includes unamortized discount of $68 and $70 as of December 31, 2024 and 2023, respectively, on the 6.1% Notes, due 2041. The effective interest rate on the 6.1% senior notes due 2041 is 7.9%. The effective interest rate on the remaining notes does not differ materially from the stated rate. Shelf Registrations On September 23, 2024, the Company filed with the Securities and Exchange Commission an automatic shelf registration statement (Registration No. 333-282288) for the potential offering and sale of debt and equity securities. The registration statement allows for the following types of securities to be offered: debt securities, junior subordinated debt securities, guarantees, preferred stock, common stock, depositary shares, warrants, stock purchase contracts, and stock purchase units. Because The Hartford is a well-known seasoned issuer, as defined in Rule 405 under the Securities Act of 1933, the registration statement became effective immediately upon filing and The Hartford may offer and sell an unlimited amount of securities under the registration statement during the three-year life of the registration statement. Junior Subordinated Debentures As of December 31, 2024 and 2023, the Company has outstanding $500 of callable junior subordinated debentures with a final maturity on February 12, 2067. Interest is payable quarterly in arrears at a variable rate that resets quarterly. The $500 junior subordinated debentures due 2067 are unsecured, subordinated and junior in right of payment and upon liquidation to all of the Company’s existing and future senior indebtedness. In addition, the debentures are effectively subordinated to all of the Company’s subsidiaries’ existing and future indebtedness and other liabilities, including obligations to policyholders. The debentures do not limit the Company’s or the Company’s subsidiaries’ ability to incur additional debt, including debt that ranks senior in right of payment and upon liquidation to the debentures. The Company has the right to defer interest payments for up to a consecutive ten years without giving rise to an event of default. Deferred interest will continue to accrue and will accrue additional interest at the then applicable interest rate. If the Company defers interest payments, the Company generally may not make payments on or redeem or purchase any shares of its capital stock or any of its debt securities or guarantees that rank upon liquidation, dissolution or winding up equally with or junior to the debentures, subject to certain limited exceptions. The Company may elect to redeem the $500 junior subordinated debentures due 2067 in whole or in part for the principal amount being redeemed plus accrued and unpaid interest to the date of redemption. In connection with the offering of this debenture, the Company entered into a Replacement Capital Covenant ("RCC") for the benefit of holders of one or more designated series of the Company's indebtedness, initially the Company's 4.3% notes due 2043. Under the terms of the RCC, if the Company redeems the debenture any time prior to February 12, 2047 (or such earlier date on which the RCC terminates by its terms) it can only do so with the proceeds from the sale of certain qualifying replacement securities. Long-Term Debt Long-term Debt Maturities (at par value) as of December 31, 2024 2024 - Current maturities $ — 2026 $ — 2027 $ — 2028 $ — 2029 $ 600 Thereafter $ 3,882 Revolving Credit Facility The Hartford has a $750 senior unsecured revolving credit facility, including $100 available to support letters of credit (the "Credit Facility"), with an expiration date of October 27, 2026. Under the Credit Facility: • Revolving loans may be in multiple currencies. • U.S. dollar loans will bear interest at a floating rate equivalent to an indexed rate that varies depending on the type of borrowing plus a basis point spread based on The Hartford's credit rating and will mature no later than October 27, 2026. • Letters of credit bear a fee based on The Hartford's credit rating and expire no later than October 27, 2027. The Credit Facility requires the Company to maintain a minimum consolidated net worth financial covenant to $11.25 billion, excluding AOCI, limits the ratio of senior debt to capitalization, excluding AOCI, at 35% and includes other customary covenants. The Credit Facility is for general corporate purposes. As of December 31, 2024 and 2023, no borrowings were outstanding, no letters of credit were issued under the Credit Facility and the Company was in compliance with all financial covenants. Lloyd's Letter of Credit Facility The Hartford has a committed credit facility agreement with a syndicate of lenders (the"Lloyd's Facility"). On October 21, 2024, The Hartford amended and restated the Lloyd's Facility. The purpose of this facility is to issue letters of credit that may be treated as Funds at Lloyd's to support underwriting capacity provided by The Hartford Corporate Underwriters Limited to the Lloyd's syndicate 1221 for the 2025 and 2026 underwriting years of account (and prior open years). The amended and restated Lloyd's Facility has two tranches, with one tranche extending a $74 commitment and the other tranche extending a £79 million ($99 as December 31, 2024). The term of the facility is two years. As of December 31, 2024, letters of credit with an aggregate face amount of $74 and £79 million, or $99, were outstanding under the Lloyd's Facility. As of December 31, 2023, letters of credit with an aggregate face amount of $74 and £79 million, or $101, were outstanding under the Lloyd's Facility. Among other covenants, the Lloyd's Facility contains financial covenants regarding The Hartford’s consolidated net worth and financial leverage. As of December 31, 2024, The Hartford was in compliance with all financial covenants of the facility. Collateralized Advances with Federal Home Loan Bank of Boston The Company’s subsidiaries, Hartford Fire Insurance Company (“Hartford Fire”) and Hartford Life and Accident Insurance Company ("HLA"), are members of the Federal Home Loan Bank of Boston ("FHLBB"). Membership allows these subsidiaries access to collateralized advances, which may be short- or long-term with fixed or variable rates. FHLBB membership required the purchase of member stock and requires additional member stock ownership of 3% or 4% of any amount borrowed. The amount of advances that can be taken is limited to a percentage of the fair value of the assets considered eligible collateral, for example, 96% for U.S. government-backed fixed maturities maturing within 3 years and 75% for AA-rated commercial mortgage-backed fixed maturities maturing in 5 years or more. In its consolidated balance sheets, The Hartford presents the liability for advances taken based on use of the funds with advances for general corporate purposes presented in short- or long-term debt and advances to earn incremental investment income presented in other liabilities, consistent with other collateralized financing transactions such as securities lending and repurchase agreements. The Connecticut Department of Insurance permits Hartford Fire and HLA to pledge up to $1.4 billion and $0.6 billion in qualifying assets, respectively, without prior approval, to secure FHLBB advances in 2024. The pledge limit is determined quarterly based on statutory admitted assets and capital and surplus of Hartford Fire and HLA, respectively. As of December 31, 2024 and 2023, there were no advances outstanding under the FHLBB facility.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	14. COMMITMENTS AND CONTINGENCIES Management evaluates each contingent matter separately. A loss is recorded if probable and reasonably estimable. Management establishes liabilities for these contingencies at its “best estimate,” or, if no one number within the range of possible losses is more probable than any other, the Company records an estimated liability at the low end of the range of losses. The Hartford is involved in claims litigation arising in the ordinary course of business, both as a liability insurer defending or providing indemnity for third-party claims brought against insureds and as an insurer defending coverage claims brought against it. The Hartford accounts for such activity through the establishment of unpaid loss and loss adjustment expense reserves. Subject to the uncertainties related to sexual molestation and sexual abuse claims, including those discussed in Note 10, Reserve for Unpaid Losses and Loss Adjustment Expenses, and in the following discussion under the caption “Run-off Asbestos and Environmental Claims,” management expects that the ultimate liability, if any, with respect to such ordinary-course claims litigation, after consideration of provisions made for potential losses and costs of defense, will not be material to the consolidated financial condition, results of operations or cash flows of The Hartford. The Hartford is also involved in other kinds of legal actions, some of which assert claims for substantial amounts. In addition to the matter described below, these actions include putative class actions seeking certification of a state or national class. Such putative class actions have alleged, for example, underpayment of claims or improper sales or underwriting practices in connection with various kinds of insurance policies, such as personal and commercial automobile and property. The Hartford also is involved in individual actions in which punitive damages are sought, such as claims alleging bad faith in the handling of insurance claims or other allegedly unfair or improper business practices. Management expects that the ultimate liability, if any, with respect to such lawsuits, after consideration of provisions made for estimated losses, will not be material to the consolidated financial condition of The Hartford. Nonetheless, given the large or indeterminate amounts sought in certain of these actions, and the inherent unpredictability of litigation, the outcome in certain matters could, from time to time, have a material adverse effect on the Company’s results of operations or cash flows in particular quarterly or annual periods. Run-off Asbestos and Environmental Claims The Company continues to receive A&E claims. Asbestos claims relate primarily to bodily injuries asserted by people who came in contact with asbestos or products containing asbestos. Environmental claims relate primarily to pollution and related clean-up costs. The vast majority of the Company's exposure to A&E relates to accident years prior to 1986 that are reported in Property & Casualty Other Operations ("Run-off A&E"). In addition, since 1986, the Company has written asbestos and environmental exposures under general liability policies and pollution liability under homeowners policies, which are reported in the Business Insurance and Personal Insurance segments, respectively. Prior to 1986, the Company wrote several different categories of insurance contracts that may cover A&E claims. First, the Company wrote primary policies providing the first layer of coverage in an insured’s liability program. Second, the Company wrote excess and umbrella policies providing higher layers of coverage for losses that exhaust the limits of underlying coverage. Third, the Company acted as a reinsurer assuming a portion of those risks assumed by other insurers writing primary, excess, umbrella and reinsurance coverages. Significant uncertainty limits the ability of insurers and reinsurers to estimate the ultimate reserves necessary for unpaid gross losses and expenses related to environmental and asbestos claims. The degree of variability of gross reserve estimates for these exposures is significantly greater than for other more traditional exposures. In the case of the reserves for asbestos exposures, factors contributing to the high degree of uncertainty include inadequate loss development patterns, plaintiffs’ expanding theories of liability, the risks inherent in major litigation, and inconsistent and emerging legal doctrines with respect to the underlying claims and with respect to the Company's coverage obligations. Furthermore, over time, insurers, including the Company, have experienced significant changes in the rate at which asbestos claims are brought, the claims experience of particular insureds, and the value of claims, making predictions of future exposure from past experience uncertain. Plaintiffs and insureds also have sought to use bankruptcy proceedings, including “pre-packaged” bankruptcies, to accelerate and increase loss payments by insurers. In addition, some policyholders have asserted new classes of claims for coverages to which an aggregate limit of liability may not apply. Further uncertainties include insolvencies of other carriers, insolvencies of insureds and unanticipated developments pertaining to the Company’s ability to recover reinsurance for A&E claims. Management believes these issues are not likely to be resolved in the near future. In the case of the reserves for environmental exposures, factors contributing to the high degree of uncertainty include expanding theories of liability and damages against insureds, emerging risks from products and substances alleged to cause damage, such as per-and polyfluoroalkyl substances ("PFAS"), the risks inherent in major litigation, inconsistent and emerging legal doctrines concerning the existence and scope of coverage for environmental claims, and the scope and level of complexity of the remediation required by regulators. The reporting pattern for assumed reinsurance claims, including those related to A&E claims, is much longer than for direct claims. In many instances, it takes months or years to determine that the policyholder’s own obligations have been met and how the reinsurance in question may apply to such claims. The delay in reporting reinsurance claims and exposures adds to the uncertainty of estimating the related reserves. It is also not possible to predict changes in the legal and legislative environment and their effect on the future development of A&E claims. Given the factors described above, the Company believes the actuarial tools and other techniques it employs to estimate the ultimate cost of claims for more traditional kinds of insurance exposure are less precise in estimating reserves for A&E exposures. For this reason, the Company principally relies on exposure-based analysis to estimate the ultimate costs of these claims, both gross and net of reinsurance, and regularly evaluates new account information in assessing its potential A&E exposures. The Company supplements this exposure-based analysis with evaluations of the Company’s historical direct net loss and expense paid and reported experience, and net loss and expense paid and reported experience by calendar and/or report year, to assess any emerging trends, fluctuations or characteristics suggested by the aggregate paid and reported activity. For its Run-off A&E claims, a s of December 31, 2024, the Company reported $224 of net asbestos and environmental reserves, including the benefit of losses ceded to the A&E ADC with NICO. In addition, the Company has recorded $850, including $62 in 2024, of a deferred gain within other liabilities for losses economically ceded to NICO but for which the benefit is not recognized in earnings until later periods. While the Company believes that its current Run-off A&E reserves are appropriate, significant uncertainties limit our ability to estimate the ultimate reserves necessary for unpaid losses and related expenses. The ultimate liabilities, thus, could exceed the currently recorded reserves, and any such additional liability, while not reasonably estimable now, could be material to The Hartford's consolidated operating results or liquidity. Unfunded Commitments As of December 31, 2024, the Company has outstanding commitments totaling $3.8 billion, of which $2.1 billion is committed to fund limited partnerships and other alternative investments, which may be called by the partnership during the commitment period to fund the purchase of new investments and partnership expenses. The funding of purchase investments in limited partnerships and other alternative investments are at the discretion of the general partner or manager and may be called at any time. Additionally, $1.0 billion of the outstanding commitments relate to various funding obligations associated with private debt and equity securities, as well as tax credits. The remaining outstanding commitments of $636 relate to mortgage loans. Of the $3.8 billion in total outstanding commitments, $53 are related to mortgage loan commitments which the Company can cancel unconditionally. Guaranty Funds and Other Insurance-related Assessments In all states, insurers licensed to transact certain classes of insurance are required to become members of a guaranty fund. In most states, in the event of the insolvency of an insurer writing any such class of insurance in the state, a guaranty fund may assess its members to pay covered claims of the insolvent insurers. Assessments are based on each member's proportionate share of written premiums in the state for the classes of insurance in which the insolvent insurer was engaged. Assessments are generally limited for any year to one or two percent of the premiums written per year depending on the state. Some states permit member insurers to recover assessments paid through surcharges on policyholders or through full or partial premium tax offsets, while other states permit recovery of assessments through the rate filing process. Liabilities for guaranty fund and other insurance-related assessments are accrued when an assessment is probable, when it can be reasonably estimated, and when the event obligating the Company to pay an imposed or probable assessment has occurred. Liabilities for guaranty funds and other insurance-related assessments are not discounted and are included as part of other liabilities in the Consolidated Balance Sheets. As of December 31, 2024 and 2023 the liability balance was $70 and $77, respectively. As of December 31, 2024 and 2023, there were $0 of premium tax offsets related to guaranty fund or other insurance-related assessments for both periods. Derivative Commitments Certain of the Company’s derivative agreements contain provisions that are tied to the financial strength ratings, as set by nationally recognized statistical agencies, of the individual legal entity that entered into the derivative agreement. If the legal entity’s financial strength were to fall below certain ratings, the counterparties to the derivative agreements could, in certain instances, terminate the agreements and demand immediate settlement of all outstanding derivative positions traded under each impacted bilateral agreement. The settlement amount is determined by netting the derivative positions transacted under each agreement. If the termination rights were to be exercised by the counterparties, it could impact the legal entity’s ability to conduct hedging activities by increasing the associated costs and decreasing the willingness of counterparties to transact with the legal entity. The aggregate fair value of all derivative instruments with credit-risk-related contingent features that are in a net liability position as of December 31, 2024 was $33 for which the legal entities have posted collateral of $31 in the normal course of business. Based on derivative contractual terms as of December 31, 2024, a downgrade of the current financial strength ratings by either Moody's or S&P would not require additional assets to be posted as collateral. This requirement could change as a result of changes in our hedging activities or to the extent changes in contractual terms are negotiated. The nature of the additional collateral that we would post, if required, would be primarily in the form of U.S. Treasury bills, U.S. Treasury notes and government agency securities. Guarantees In the ordinary course of selling businesses or entities to third parties, the Company has agreed to indemnify purchasers for losses arising subsequent to the closing due to breaches of representations and warranties with respect to the business or entity being sold or with respect to covenants and obligations of the Company and/or its subsidiaries. These obligations are typically subject to various time limitations, defined by the contract or by operation of law, such as statutes of limitation. In some cases, the maximum potential obligation is subject to contractual limitations, while in other cases such limitations are not specified or applicable. The Company does not expect to make any material payments on these guarantees and is not carrying any material liabilities associated with these guarantees. The Hartford has guaranteed the timely payment of contractual claims under certain life, accident and health and annuity contracts issued by its former life and annuity business with most of the guaranteed contracts issued between 1990 and 1997 (the "Talcott Guarantees"). Upon the sale of the life and annuity business in May 2018, the purchaser indemnified the Company for any liability arising under the guarantees. The Talcott Guarantees cover contractual obligations only but otherwise have no limitation as to maximum potential future payments. The liability for credit losses ("LCL") for Talcott Guarantees is calculated for the estimated amount payable under guaranteed contracts multiplied by the probability of default and the amount of loss given a default. The probability of default is assigned by credit rating of the applicable insurance company that issued the contract and is based on historical insurance industry defaults for liabilities with similar durations estimated through multiple economic cycles. Credit ratings are current and forward-looking and consider a variety of economic outcomes. Because annuities represent the majority of the contracts issued, the loss given default factors are based on a historical study of annuity policyholder recoveries from insolvent estate assets. The Company's exposure is expected to run off over a period that will include more than one economic cycle. The Company's evaluation of the required LCL for the Talcott Guarantees considers the current economic environment as well as macroeconomic scenarios similar to the approach used to estimate the ACL for mortgage loans. See Note 5 - Investments. In 2022, the LCL decreased from $25 to $22 primarily reflecting a decrease in the estimated amount payable under guaranteed contracts. In 2023, the LCL decreased to $9 primarily due to an upgrade of Talcott's credit rating, as well as a decrease in the estimated amount payable under guaranteed contracts. During 2024, the LCL decreased to $7 primarily due to an improvement of Talcott's assumed liquidation rate, as well as a decrease in the estimated amount payable under guaranteed contracts. The Company has never experienced a loss on financial guarantees similar to the Talcott Guarantees and we believe the risk of loss is remote.

Equity

Equity	12 Months Ended
	Dec. 31, 2024
Equity [Abstract]
Equity	15. EQUITY Equity Repurchase Program In July, 2024, the Board of Directors approved a share repurchase authorization for up to $3.3 billion effective from August 1, 2024 to December 31, 2026. As of December 31, 2024, the Company has $3.15 billion remaining for equity repurchases under this share repurchase program. The Hartford's $3.0 billion equity repurchase program authorized by its Board of Directors in August 2022, expired on December 31, 2024. The Hartford's previous $3.0 billion equity repurchase program authorized by its Board of Directors in December 2020 expired on December 31, 2022. During the year ended December 31, 2024, 2023, and 2022 the Company repurchased $1.5 billion (14.4 million shares), $1.4 billion (19.2 million shares) and $1.6 billion (22.3 million shares), respectively, of common stock under these repurchase programs. During the period from January 1, 2025 through February 20, 2025, the Company repurchased $248 (2.2 million shares) under the $3.3 billion repurchase program effective from August 1, 2024 to December 31, 2026. The timing of any repurchases of shares is dependent on several factors, including the market price of the Company's securities, the Company's capital position, consideration of the effect of any repurchases on the Company's financial strength or credit ratings, the Company's blackout periods, and other considerations. The Company accrued $12 in excise taxes on share repurchases as of December 31, 2024 and 2023, partially reduced by share issuances, which are reported in other liabilities on the Company's Consolidated Balance Sheets. Preferred Stock The Company has outstanding 13.8 million depositary shares each representing 1/1000th interest in a share of the Company’s 6.0% Series G non-cumulative perpetual preferred stock (“Preferred Stock”) with a liquidation preference of $25,000 per share (equivalent to $25.00 per depositary share). The Preferred Stock is perpetual and has no maturity date. Dividends are recorded when declared. Dividends are payable, if declared, quarterly in arrears on the 15th day of February, May, August and November of each year. If a dividend is not declared and paid or made payable on all outstanding shares of the Preferred Stock for the latest completed dividend period, no dividends may be paid or declared on The Hartford’s common stock and The Hartford may not purchase, redeem, or otherwise acquire its common stock. The Preferred Stock is redeemable at the Company’s option in whole or in part, at a redemption price of $25,000 per share, plus unpaid dividends attributable to the current dividend period. Statutory Results The U.S. domestic insurance subsidiaries of The Hartford prepare their statutory financial statements in conformity with statutory accounting practices prescribed or permitted by the applicable state insurance department, which vary materially from U.S. GAAP. Prescribed statutory accounting practices include publications of the NAIC, as well as state laws, regulations and general administrative rules. The differences between statutory financial statements and financial statements prepared in accordance with U.S. GAAP vary between domestic and foreign jurisdictions. The principal differences are that statutory financial statements do not reflect deferred policy acquisition costs and limit deferred income taxes, recognize a deferred gain on retroactive reinsurance within a special surplus account rather than as other liabilities, predominately use interest rate and mortality assumptions prescribed by the NAIC for life benefit reserves, generally carry investments in bonds at amortized cost, and present insurance assets and liabilities net of reinsurance. For reporting purposes, statutory capital and surplus is referred to collectively as "statutory capital". U.S. Statutory Net Income For the years ended December 31, 2024 2023 2022 Employee Benefits Insurance Subsidiary $ 576 $ 592 $ 378 Property and Casualty Insurance Subsidiaries 2,112 1,887 1,514 Total $ 2,688 $ 2,479 $ 1,892 U.S. Statutory Capital As of December 31, 2024 2023 Employee Benefits Insurance Subsidiary $ 2,708 $ 2,748 Property and Casualty Insurance Subsidiaries 13,294 12,549 Total $ 16,002 $ 15,297 Regulatory Capital Requirements The Company's U.S. insurance companies' states of domicile impose RBC requirements. The requirements provide a means of measuring the minimum amount of statutory capital appropriate for an insurance company to support its overall business operations based on its size and risk profile. Companies below specific trigger points or ratios are classified within certain levels, each of which requires specified corrective action. All of the Company's operating insurance subsidiaries had RBC ratios in excess of the minimum levels required by the applicable insurance regulations. Similar to the RBC ratios that are employed by U.S. insurance regulators, regulatory authorities in the international jurisdictions in which the Company operates generally establish minimum solvency requirements for insurance companies. All of the Company's international insurance subsidiaries expect to maintain capital levels in excess of the minimum levels required by the applicable regulatory authorities. Dividend Restrictions Dividends to HIG Holding Company from its insurance subsidiaries are restricted by insurance regulation. The Company’s principal insurance subsidiaries are domiciled in the United States and the United Kingdom. The payment of dividends by Connecticut-domiciled insurers is limited under the insurance holding company laws of Connecticut. These laws require notice to and approval by the state insurance commissioner for the declaration or payment of any dividend, which, together with other dividends or distributions made within the preceding twelve months, exceeds the greater of (i) 10% of the insurer’s statutory policyholder surplus as of December 31 of the preceding year or (ii) net income (or net gain from operations, if such company is a life insurance company) for the preceding year, in each case determined under statutory insurance accounting principles. In addition, if any dividend of a Connecticut-domiciled insurer exceeds the insurer’s earned surplus, it requires the prior approval of the Connecticut Insurance Commissioner. Property casualty insurers domiciled in New York, including NIC and Navigators Specialty Insurance Company ("NSIC"), generally may not, without notice to and approval by the state insurance commissioner, pay dividends out of earned surplus in any twelve‑month period that exceeds the lesser of (i) 10% of the insurer’s statutory policyholders’ surplus as of the most recent financial statement on file, or (ii) 100% of its adjusted net investment income, as defined, for the same twelve month period. Corporate members of Lloyd's Syndicates may pay dividends to its parent to the extent of available profits that have been distributed from the syndicate in excess of the Funds at Lloyd's ("FAL") capital requirement and subject to restrictions imposed under UK Company Law. The FAL is determined based on the syndicate’s solvency capital requirement ("SCR") of the syndicate under the Solvency II capital adequacy model, the current regulatory framework governing UK domiciled insurers, plus a Lloyd’s specific economic capital assessment. Insurers domiciled in the United Kingdom may pay dividends to its parent out of its statutory profits subject to restrictions imposed under U.K. Company law and Solvency II. The insurance holding company laws of the other jurisdictions in which The Hartford’s insurance subsidiaries are incorporated (or deemed commercially domiciled) generally contain similar (although in certain instances more restrictive) limitations on the payment of dividends. In addition to statutory limitations on paying dividends, the Company also takes other items into consideration when determining dividends from subsidiaries. These considerations include, but are not limited to, expected earnings and capitalization of the subsidiaries, regulatory capital requirements, liquidity requirements and state deposit requirements of the individual operating company. In 2024, HIG Holding Company received $608 of dividends from HLA, $136 from Hartford Funds and $31 from other non-insurance subsidiaries. In addition, HIG Holding Company received $1.5 billion of net dividends from P&C subsidiaries in 2024, which excludes $75 of P&C dividends that were subsequently contributed to P&C subsidiaries and $50 of P&C dividends related to interest payments on an intercompany note owed by Hartford Holdings, Inc. ("HHI") to Hartford Fire Insurance Company. The Company’s property and casualty insurance subsidiaries have regulatory dividend capacity of $2.0 billion for 2025. The HIG Holding Company expects to receive approximately $1.7 billion of net dividends after considering state deposit and regulatory capital requirements to support growth in certain entities, dividends that are expected to be subsequently contributed to P&C subsidiaries and dividends related to interest on intercompany notes. HLA has regulatory dividend capacity of $592 in 2025 with approximately $590 of dividends expected in 2025. There are no current restrictions on HIG Holding Company's ability to pay dividends to its stockholders. Restricted Net Assets As of December 31, 2024, the Company's insurance subsidiaries had net assets of $15.1 billion, determined in accordance with U.S. GAAP, that were restricted from payment to the HIG Holding Company, without prior regulatory approval.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2024
Income Tax Disclosure [Abstract]
Income Taxes	16. INCOME TAXES Income Tax Expense The Company and its subsidiaries file income tax returns in the U.S. federal jurisdiction, and various state and foreign jurisdictions, as applicable. Income before income taxes included income from domestic operations of $3,758, $3,042 and $2,260 for the years ended December 31, 2024, 2023 and 2022, and income (losses) from foreign operations of $91, $46 and $2 for the years ended December 31, 2024, 2023 and 2022. Income Tax Expense For the years ended December 31, 2024 2023 2022 Income tax expense (benefit) Current - U.S. federal $ 783 $ 582 $ 550 Foreign 2 — (1) Total current 785 582 549 Deferred - U.S. federal (57) 6 (124) Foreign 10 (4) 18 Total deferred (47) 2 (106) Total income tax expense $ 738 $ 584 $ 443 Income Tax Rate Reconciliation For the years ended December 31, 2024 2023 2022 Tax provision at U.S. federal statutory rate $ 808 $ 648 $ 474 Nontaxable net investment income (40) (41) (29) Other (30) (23) (2) Provision for income taxes $ 738 $ 584 $ 443 The current income tax receivable of $12 as of December 31, 2024 is included in other assets in the Consolidated Balance Sheets. The current income tax payable of $18 as of December 31, 2023, is included in other liabilities in the Consolidated Balance Sheets. Deferred Taxes Deferred tax assets and liabilities on the consolidated balance sheets represent the tax consequences of differences between the financial reporting and tax basis of assets and liabilities. The Company predominantly pays non-income state taxes as a percentage of premiums written which are accounted for as policy acquisition costs. State income taxes were $4, $3 and $4 for the years ended December 31, 2024, 2023 and 2022, respectively, and are included in other expenses. The Hartford has not recorded state deferred taxes, including net deferred tax assets from state operating loss carryforwards, because the Company does not expect to earn state taxable income to utilize such state tax benefits. Deferred Tax Assets (Liabilities) As of December 31, 2024 2023 Deferred tax assets Loss reserves and tax discount $ 550 $ 517 Unearned premium reserve and other underwriting related reserves 517 483 Employee benefits 181 172 Net unrealized losses on investments 394 387 Net operating loss carryover 41 45 Other — 1 Total deferred tax assets 1,683 1,605 Valuation allowance — (12) Deferred tax assets, net of valuation allowance 1,683 1,593 Deferred tax liabilities Deferred acquisition costs (183) (163) Investment-related items (167) (110) Other depreciable and amortizable assets (91) (147) Other (13) — Total deferred tax liabilities (454) (420) Net deferred tax asset $ 1,229 $ 1,173 Management has assessed the need for a valuation allowance against its deferred tax assets based on tax character and jurisdiction, and as part of this assessment, the Company reduced the valuation allowance related to the deferred tax asset for foreign net operating losses from $12 as of December 31, 2023 to $0 as of December 31, 2024. In making the assessment, management considered future taxable temporary difference reversals, future taxable income exclusive of reversing temporary differences, the ability to hold assets to recovery, and carryovers, taxable income in open carry back years and other tax planning strategies which management views as prudent and feasible. Uncertain Tax Positions Rollforward of Unrecognized Tax Benefits For the years ended December 31, 2024 2023 2022 Balance, beginning of period $ 26 $ 22 $ 16 Gross increases - tax positions in current period 3 5 6 Gross decreases - tax positions in current period (1) — — Lapse of statute of limitations (4) (1) — Balance, end of period $ 24 $ 26 $ 22 The entire amount of unrecognized tax benefits, if recognized, would affect the effective tax rate in the period of the release. The Company believes it is reasonably possible approximately $14 of its currently unrecognized tax benefits may be recognized by the end of 2025 as a result of a lapse of the applicable statute of limitations. Other Tax Matters The federal statute of limitations for the Company is closed through the 2020 tax year with the exception of NOL carryforwards utilized in open tax years and the Navigators pre-acquisition 2019 tax period. Management believes that adequate provision has been made in the Company's Consolidated Financial Statements for any potential adjustments that may result from tax examinations and other tax-related matters for all open tax years. The Company classifies interest and penalties (if applicable) as income tax expense in the Consolidated Financial Statements. The Company recognized net interest expenses of $1, $2 and $1 for the years ended December 31, 2024, 2023 and 2022. The Company does not believe it would be subject to any penalties in any open tax years and, therefore, has not recorded any accrual for penalties.

Changes in and Reclassification

Changes in and Reclassifications From Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2024
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Changes in and Reclassifications From Accumulated Other Comprehensive Income (Loss)	17. CHANGES IN AND RECLASSIFICATIONS FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) Changes in AOCI, Net of Tax for the Year Ended December 31, 2024 Changes in Net Unrealized Gain (Loss) on Fixed Maturities, AFS Unrealized Losses on Fixed Maturities, AFS with ACL Net Gain (Loss) on Cash Flow Hedging Instruments Foreign Currency Translation Adjustments Liability for Future Policy Benefits Adjustments Pension and Other Postretirement Plan Adjustments AOCI, Beginning balance $ (1,482) $ (8) $ 21 $ 37 $ 25 $ (1,442) $ (2,849) OCI before reclassifications (241) 2 27 (10) 10 (34) (246) Amounts reclassified from AOCI 169 1 (3) — — 32 199 OCI, before tax (72) 3 24 (10) 10 (2) (47) Income tax benefit (expense) 15 (1) (5) 2 (2) 1 10 OCI, net of tax (57) 2 19 (8) 8 (1) (37) Ending balance $ (1,539) $ (6) $ 40 $ 29 $ 33 $ (1,443) $ (2,886) Changes in AOCI, Net of Tax for the Year Ended December 31, 2023 Changes in Net Unrealized Gain (Loss) on Fixed Maturities, AFS Unrealized Losses on Fixed Maturities, AFS with ACL Net Gain (Loss) on Cash Flow Hedging Instruments Foreign Currency Translation Adjustments Liability for Future Policy Benefits Adjustments Pension and Other Postretirement Plan Adjustments AOCI, Beginning balance $ (2,594) $ (7) $ 40 $ 31 $ 35 $ (1,346) $ (3,841) OCI before reclassifications 1,275 (5) (25) 8 (13) (148) 1,092 Amounts reclassified from AOCI 133 4 1 — — 27 165 OCI, before tax 1,408 (1) (24) 8 (13) (121) 1,257 Income tax benefit (expense) (296) — 5 (2) 3 25 (265) OCI, net of tax 1,112 (1) (19) 6 (10) (96) 992 Ending balance $ (1,482) $ (8) $ 21 $ 37 $ 25 $ (1,442) $ (2,849) Changes in AOCI, Net of Tax for the Year ended December 31, 2022 Changes in Net Unrealized Gain (Loss) on Fixed Maturities, AFS Unrealized Losses on Fixed Maturities, AFS with ACL Net Gain (Loss) on Cash Flow Hedging Instruments Foreign Currency Translation Adjustments Liability for Future Policy Benefits Adjustments Pension and Other Postretirement Plan Adjustments AOCI, Beginning balance $ 1,631 $ (2) $ 6 $ 41 $ (59) $ (1,489) $ 128 OCI before reclassifications (5,630) (6) 56 (13) 119 119 (5,355) Amounts reclassified from AOCI 282 — (13) — — 62 331 OCI, before tax (5,348) (6) 43 (13) 119 181 (5,024) Income tax benefit (expense) 1,123 1 (9) 3 (25) (38) 1,055 OCI, net of tax (4,225) (5) 34 (10) 94 143 (3,969) Ending balance $ (2,594) $ (7) $ 40 $ 31 $ 35 $ (1,346) $ (3,841) Reclassifications from AOCI AOCI Amount Reclassified from AOCI Affected Line Item in the Consolidated Statement of Operations For the year ended December 31, 2024 For the year ended December 31, 2023 For the year ended December 31, 2022 Net Unrealized Gain (Loss) on Fixed Maturities, AFS Fixed maturities, AFS $ (169) $ (133) $ (282) Net realized gains (losses) (169) (133) (282) Total before tax (35) (28) (59) Income tax expense $ (134) $ (105) $ (223) Net income Unrealized Loss on Fixed Maturities, AFS with ACL Fixed maturities, AFS $ (1) $ (4) $ — Net realized gains (losses) (1) (4) — Total before tax — (1) — Income tax expense $ (1) $ (3) $ — Net income Net Gain (Loss) on Cash Flow Hedging Instruments Interest rate swaps $ (25) $ (26) $ 6 Net investment income Interest rate swaps 16 15 (2) Interest expense Foreign currency swaps 12 10 9 Net investment income 3 (1) 13 Total before tax 1 — 3 Income tax expense $ 2 $ (1) $ 10 Net income Pension and Other Postretirement Plan Adjustments Amortization of prior service credit $ 7 $ 7 $ 7 Insurance operating costs and other expenses Amortization of actuarial loss (39) (34) (69) Insurance operating costs and other expenses (32) (27) (62) Total before tax (7) — (13) Income tax expense (25) (27) (49) Net income Total amounts reclassified from AOCI $ (158) $ (136) $ (262) Net income

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2024
Retirement Benefits [Abstract]
Employee Benefit Plans	18. EMPLOYEE BENEFIT PLANS Investment and Savings Plan Substantially all U.S. employees of the Company are eligible to participate in The Hartford Investment and Savings Plan under which designated contributions may be invested in a variety of investments, including up to 10% in a fund consisting largely of common stock of The Hartford. The Company's contributions include a non-elective contribution of 2.0% of eligible compensation and a dollar-for-dollar matching contribution of up to 6.0% of eligible compensation contributed by the employee. The Company also maintains a non-qualified savings plan, The Hartford Excess Savings Plan, with the dollar-for-dollar matching contributions related to employee compensation in excess of the amount of eligible compensation that can be contributed under the tax-qualified Investment and Savings Plan. An employee's eligible compensation includes overtime and bonuses but for the Investment and Savings Plan and Excess Savings Plan combined, is limited to $1 annually. The total cost to The Hartford for these plans was approximately $193, $163 and $142 for the years ended December 31, 2024, 2023 and 2022, respectively. Additionally, The Hartford has established defined contribution pension plans for certain employees of the Company’s international subsidiaries. The cost to The Hartford for each of the years ended December 31, 2024, 2023 and 2022 for these plans was $3. Postretirement Benefit Plans Defined Benefit Pension Plan - The Company maintains The Hartford Retirement Plan for U.S. Employees, a U.S. qualified defined benefit pension plan (“U.S. Pension Plan”) that covers substantially all U.S. employees hired prior to January 1, 2013. The Company also maintains non-qualified pension plans to provide retirement benefits previously accrued that are in excess of Internal Revenue Code limitations, as well as a Canadian defined benefit pension plan. Together, the non-qualified and Canadian defined benefit plan are referred to as "Other Pension Plans". The U.S. Pension Plan includes two benefit formulas, both of which are frozen: a final average pay formula (for which all accruals ceased as of December 31, 2008) and a cash balance formula (for which benefit accruals ceased as of December 31, 2012, although interest will continue to accrue to existing cash balance formula account balances). Employees who were participants as of December 31, 2012 continue to earn vesting credit with respect to their frozen accrued benefits if they continue to work. The interest crediting rate on the cash balance plan is the greater of the average annual yield on 10-year U.S. Treasury Securities published in December of the prior calendar year or 3.3%. The Hartford Excess Pension Plan I and The Hartford Excess Pension Plan II, the Company's non-qualified excess pension benefit plans for certain highly compensated employees, are also frozen. Group Retiree Health Plan - The Company provides certain health care and life insurance benefits for eligible retired employees. The Company’s contribution for health care benefits are a function of the retiree’s date of retirement and years of service. In addition, the plan has a defined dollar cap for certain retirees which limits average Company contributions. The Hartford has prefunded a portion of the health care obligations where such prefunding can be accomplished on a tax effective basis. Beginning January 1, 2017, for retirees 65 and older who were participating in the Retiree PPO Medical Plan, the Company funds the cost of medical and dental health care benefits through contributions to a Health Reimbursement Account and covered individuals can access a variety of insurance plans from a health care exchange. Effective January 1, 2002, Company-subsidized retiree medical, retiree dental and retiree life insurance benefits were eliminated for employees with original hire dates with the Company on or after January 1, 2002. The Company also amended its postretirement medical, dental and life insurance coverage plans to no longer provide subsidized coverage for employees who retired on or after January 1, 2014. Assumptions Pursuant to accounting principles related to the Company’s pension and other postretirement obligations to employees under its various benefit plans, the Company is required to make a significant number of assumptions in order to calculate the related liabilities and expenses each period. The two economic assumptions that have the most impact on pension and other postretirement expense under the defined benefit pension plans and group retiree health plan are the discount rate and the expected long-term rate of return on plan assets. The yield curve used to determine the discount rate is based on yields of high-quality fixed income investments grouped by duration, using the above mean average for each duration group. Based on all available market and industry information, it was determined that 5.65% and 5.56% were the appropriate discount rates as of December 31, 2024 to calculate the Company’s U.S. Pension Plan and other postretirement obligations, respectively. The expected long-term rate of return considers both current market yields and forecasted investment returns expected to be achieved by the plan’s investment strategy over the remaining life of the plan. The Company also considers the plan's funded status, the investment volatility, duration and total returns for various time periods related to the characteristics of the pension obligation, which are influenced by the Company's workforce demographics. For the pension plan, the Company has assumed an allocation of approximately 81% in fixed income securities and 19% in non-fixed income securities (global equities and limited partnerships) in its assumed expected long-term rate of return for the years ended December 31, 2024 and 2023. For the other postretirement plans, the Company has assumed an allocation of 100% in fixed income securities in its assumptions for the years ended December 31, 2024 and 2023. Based upon these analyses, management determined the long-term rate of return assumption to be 5.90% and 4.50% for the Company's U.S. Pension Plan and other postretirement obligations, respectively, for the year ended December 31, 2024 and 6.10% and 4.50% for the Company's U.S. Pension Plan and other postretirement obligations, respectively, for the year ended December 31, 2023. To determine the Company's 2025 expense, the Company has assumed an allocation of 81% in fixed income securities and 19% in non-fixed income securities for the pension plan and an allocation of 100% in fixed income securities for the postretirement plans, contributing to an expected long-term rate of return on plan assets of 6.40% and 4.80% for the Company's U.S. Pension Plan and other postretirement obligations, respectively. Assumptions Used in Calculating the Benefit Obligations and the Net Amount Recognized For the years ended December 31, 2024 2023 2022 Weighted Average Assumptions used to determine benefit obligations Discount rate: U.S. Pension Plan 5.65 % 5.15 % 5.43 % Other Pension Plans 5.59 % 5.14 % 5.40 % Other postretirement benefits 5.56 % 5.13 % 5.39 % Interest crediting rate on cash balance plan 4.30 % 4.36 % 3.89 % Weighted Average Assumptions used to determine net periodic benefit costs: Discount rate: U.S. Pension Plan 5.15 % 5.43 % 2.91 % Other Pension Plans 5.13 % 5.40 % 2.83 % Other postretirement benefits 5.13 % 5.39 % 2.72 % Expected long-term rate of return on plan assets: U.S. Pension Plan 5.90 % 6.10 % 5.10 % Other Pension Plans 4.00 % 4.40 % 3.30 % Other postretirement benefits 4.50 % 4.50 % 4.80 % Assumed Health Care Cost Trend Rates Pre-65 health care cost trend rate 6.50 % 8.00 % 7.00 % Post-65 health care cost trend rate N/A N/A N/A Rate to which the cost trend rate is assumed to decline (the ultimate trend rate) 4.00 % 4.50 % 4.50 % Year that the rate reaches the ultimate trend rate 2045 2038 2032 Obligations and Funded Status The following tables set forth a reconciliation of beginning and ending balances of the benefit obligation and fair value of plan assets, as well as the funded status of the Company's defined benefit pension and postretirement health care and life insurance benefit plans. Information is presented for the qualified U.S. Pension Plan, Other Pension Plans (including non-qualified plans and the Canadian pension plan) and other postretirement benefits. U.S. Pension Plan Other Pension Plans Total Pension Plans Other Postretirement Benefits For the years ended December 31, 2024 2023 2024 2023 2024 2023 2024 2023 Change in Benefit Obligation Benefit obligation — beginning of year $ 3,269 $ 3,156 $ 334 $ 334 $ 3,603 $ 3,490 $ 138 $ 143 Service cost 2 3 — — 2 3 — — Interest cost 160 163 16 17 176 180 7 7 Plan participants’ contributions — — — — — — 7 8 Actuarial loss (gain) (9) 38 2 2 (7) 40 (3) 3 Changes in assumptions (146) 100 (12) 8 (158) 108 (4) 3 Benefits paid [1] (201) (191) (27) (27) (228) (218) (23) (26) Benefit obligation — end of year [2] $ 3,075 $ 3,269 $ 313 $ 334 $ 3,388 $ 3,603 $ 122 $ 138 Change in Plan Assets Fair value of plan assets — beginning of year $ 3,562 $ 3,513 $ 11 $ 11 $ 3,573 $ 3,524 $ 18 $ 30 Actual return on plan assets 34 254 — — 34 254 — 1 Employer contributions [3] — — — 1 — 1 6 5 Plan participants' contributions [3] — — — — — — 7 8 Benefits paid [1] (201) (191) (1) (1) (202) (192) (23) (26) Expenses paid (8) (14) — — (8) (14) — — Foreign exchange adjustment — — (1) — (1) — — — Fair value of plan assets — end of year $ 3,387 $ 3,562 $ 9 $ 11 $ 3,396 $ 3,573 $ 8 $ 18 Funded status — end of year $ 312 $ 293 $ (304) $ (323) $ 8 $ (30) $ (114) $ (120) Amounts Recognized in the Consolidated Balance Sheets Other assets $ 312 $ 293 $ — $ — $ 312 $ 293 $ — $ — Other liabilities $ — $ — $ (304) $ (323) $ (304) $ (323) $ (114) $ (120) [1] Other postretirement benefits paid represent payments from plan assets for non-key employee postretirement medical benefits, Company assets and plan participants' contributions. [2] As of December 31, 2024 and 2023, the Accumulated Benefit Obligation is equal to the Projected Benefit Obligation. [3] Employer and plan participants' contributions for the Other Postretirement Benefits represent funding from Company and plan participant assets. Changes in assumptions for the U.S. Pension Plan in 2024 primarily included a $145 decrease in the benefit obligation for pension benefits as a result of an increase in the discount rate from 5.15% as of the December 31, 2023 valuation to 5.65% as of the December 31, 2024 valuation. Changes in assumptions in 2023 included an $88 increase in the benefit obligation for pension benefits as a result of a decrease in the discount rate from 5.43% as of the December 31, 2022 valuation to 5.15% as of the December 31, 2023 valuation. Changes in assumptions for the Other Pension Plans in 2024 primarily included a $12 decrease in the benefit obligation for pension benefits as a result of an increase in the discount rate from 5.14% as of the December 31, 2023 valuation to 5.59% as of the December 31, 2024 valuation. Changes in assumptions in 2023 included a $7 increase in the benefit obligation for pension benefits as a result of a decrease in the discount rate from 5.40% as of the December 31, 2022 valuation to 5.14% as of the December 31, 2023 valuation. Included in the benefit obligation for the U.S. Pension Plan in the table above, the cash balance plan pension benefit obligation was $332 and $357 as of December 31, 2024 and 2023, respectively. The fair value of assets for total pension plans, and hence the funded status, presented in the table above excludes assets of $245 and $198 as of December 31, 2024 and 2023, respectively, held in rabbi trusts and designated for the Other Pension Plans. The Company made no contribution in 2024, but contributed $3 to the rabbi trusts in 2023. The assets do not qualify as plan assets; however, the assets are available to pay benefits for certain retired, terminated and active participants. Such assets are available to the Company’s general creditors in the event of insolvency. The rabbi trusts' assets consist of equity and fixed income investments. To the extent the fair value of these rabbi trusts were included in the table above, total pension plan assets would have been $3,641 and $3,771 as of December 31, 2024 and 2023, respectively, and the funded status of total pension plans would have been $253 and $168 as of December 31, 2024 and 2023, respectively. The tables below present an aggregate view of net periodic cost (benefit) and components of other comprehensive income and AOCI for pension plans that includes both the U.S. Pension Plan and Other Pension Plans. Net periodic cost (benefit) is recognized in insurance operating costs and other expenses in the Consolidated Statement of Operations. Net Periodic Cost (Benefit) Pension Benefits Other Postretirement Benefits For the years ended December 31, 2024 2023 2022 2024 2023 2022 Service cost $ 2 $ 3 $ 4 $ — $ — $ — Interest cost 176 180 111 7 7 4 Expected return on plan assets (230) (235) (202) (1) (1) (2) Amortization of prior service credit — — — (7) (7) (7) Amortization of actuarial loss 34 29 62 5 5 7 Net periodic cost (benefit) $ (18) $ (23) $ (25) $ 4 $ 4 $ 2 Amounts Recognized in Other Comprehensive Income (Loss) Pension Benefits Other Postretirement Benefits For the years ended December 31, 2024 2023 2022 2024 2023 2022 Amortization of actuarial loss $ 34 $ 29 $ 62 $ 5 $ 5 $ 7 Amortization of prior service credit — — — (7) (7) (7) Net actuarial gain (loss) (41) (142) 89 7 (6) 30 Prior service cost (credit) — — — — — — Total $ (7) $ (113) $ 151 $ 5 $ (8) $ 30 Amounts in Accumulated Other Comprehensive Income (Loss), Before Tax, not yet Recognized as Components of Net Periodic Benefit Cost Pension Benefits Other Postretirement Benefits As of December 31, 2024 2023 2022 2024 2023 2022 Net loss $ (1,784) $ (1,777) $ (1,664) $ (76) $ (88) $ (87) Prior service credit — — — 33 40 47 Total $ (1,784) $ (1,777) $ (1,664) $ (43) $ (48) $ (40) Actuarial net losses in AOCI that exceed 10% of the greater of the benefit obligation or the market-related value of plan assets are amortized to expense over the average future life expectancy of plan participants. Pension Plan Assets Investment Strategy and Target Allocation The overall investment strategy of the U.S. Pension Plan is to produce total investment returns that provide sufficient funding for present and anticipated future benefit obligations within the constraints of a prudent level of portfolio risk and diversification. With respect to asset management, the oversight responsibility of the U.S. Pension Plan rests with The Hartford’s Pension Investment Committee composed of individuals whose responsibilities include establishing overall objectives and the setting of investment policy; selecting appropriate investment options and ranges; selecting qualified service providers such as investment managers and investment consultants; reviewing the asset allocation mix and asset allocation targets on a regular basis; and monitoring performance to determine whether or not the rate of return objectives are being met and that policy and guidelines are being followed. The Pension Investment Committee has adopted a de-risking glide path that reduces the target allocation to equity securities and limited partnerships and increases the allocation to fixed income securities over time in response to improvement in the funded status of the U.S. Pension Plan. The Company believes that the asset allocation decision will be the single most important factor determining the long-term performance of the U.S. Pension Plan. Target Asset Allocation Ranges Pension Plans Other Postretirement Plans Minimum Maximum Minimum Maximum Equity securities — % 20 % — % — % Fixed income securities 75 % 95 % 100 % 100 % Limited partnerships — % 25 % — % — % Divergent market performance among different asset classes and changes in the context of the glide path may, from time to time, cause the asset allocation to deviate from the desired asset allocation ranges. The asset allocation mix is reviewed on a periodic basis. If it is determined that an asset allocation mix rebalancing is required, future portfolio additions and withdrawals will be used first, as necessary, to bring the allocation within tactical ranges, before shifting assets across portfolios. The U.S. Pension Plan invests in multiple asset classes reflecting the current needs, investment preferences, risk tolerances and the desired degree of diversification of the U.S. Pension Plan. These asset classes include publicly traded fixed income securities and equities, private fixed income securities, commercial mortgage loans and limited partnerships. Investment portfolios are primarily managed by affiliated managers. In addition, the Company uses U.S. Treasury bond futures contracts and U.S. Treasury STRIPS, in addition to certain other investments, in a duration overlay program to adjust the duration of U.S. Pension Plan assets to better match the duration of the benefit obligation. Pension Plan Assets at Fair Value As of December 31, 2024 As of December 31, 2023 Asset Category Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Short-term investments: $ 164 $ — $ — $ 164 $ 187 $ — $ — $ 187 Fixed Income Securities: Corporate — 1,586 33 1,619 — 1,643 36 1,679 RMBS — 105 — 105 — 111 — 111 U.S. Treasuries 8 278 — 286 — 271 — 271 Foreign government — 9 9 18 — 11 10 21 CMBS — 28 1 29 — 49 1 50 Other fixed income [1] — 162 — 162 — 160 — 160 Mortgage Loans — — 131 131 — — 143 143 Equity Securities: Domestic 14 4 — 18 11 23 — 34 International — 37 — 37 — 45 — 45 Total pension plan assets at fair value, in the fair value hierarchy [2] 186 2,209 174 2,569 198 2,313 190 2,701 Other Investments, at net asset value [3]: Limited partnerships 778 826 Total pension plan assets at fair value $ 186 $ 2,209 $ 174 $ 3,347 $ 198 $ 2,313 $ 190 $ 3,527 [1] Includes ABS, municipal bonds and CLOs. [2] Excludes $49 and $46 as of December 31, 2024 and 2023, respectively, of investment receivables net of investment payables that are excluded from this disclosure requirement because they are trade receivables in the ordinary course of business where the carrying amount approximates fair value. [3] Investments that are measured at net asset value per share or an equivalent and have not been classified in the fair value hierarchy. The tables below provide fair value level 3 roll forwards for the U.S. Pension Plan Assets for which significant unobservable inputs ("Level 3") are used in the fair value measurement on a recurring basis. The U.S. Pension Plan classifies the fair value of financial instruments within Level 3 if there are no observable markets for the instruments or, in the absence of active markets, if one or more of the significant inputs used to determine fair value are based on the U.S. Pension Plan’s own assumptions. Therefore, the gains and losses in the tables below include changes in fair value due to both observable and unobservable factors. Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3) Assets Corporate Foreign government Mortgage loans Other [1] Totals Fair Value as of January 1, 2024 $ 36 $ 10 $ 143 $ 1 $ 190 Realized gains, net — — — — — Changes in unrealized gains (losses), net — (1) 1 — — Purchases 5 — — — 5 Sales (8) — (13) — (21) Transfers into Level 3 [2] — — — — — Transfers out of Level 3 [2] — — — — — Fair Value as of December 31, 2024 $ 33 $ 9 $ 131 $ 1 $ 174 Fair Value as of January 1, 2023 $ 31 $ 1 $ 165 $ 1 $ 198 Realized gains (losses), net — — (3) — (3) Changes in unrealized gains (losses), net 2 (1) 8 — 9 Purchases — 10 3 — 13 Sales — — (30) — (30) Transfers into Level 3 [2] 5 — — — 5 Transfers out of Level 3 [2] (2) — — — (2) Fair Value as of December 31, 2023 $ 36 $ 10 $ 143 $ 1 $ 190 [1] "Other" includes CMBS. [2] Transfers into and/or (out of) Level 3 are primarily attributable to the availability of market observable information and the re-evaluation of the observability of pricing. There was less than $1 in Company common stock included in the U.S. Pension Plan’s assets as of December 31, 2024 and 2023 as part of a passive indexing strategy. Other Postretirement Plan Assets at Fair Value As of December 31, 2024 As of December 31, 2023 Asset Category Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Short-term investments $ 8 $ — $ — $ 8 $ 16 $ — $ — $ 16 Fixed Income Securities: U.S. Treasuries — — — — — 2 — 2 Total other postretirement plan assets at fair value $ 8 $ — $ — $ 8 $ 16 $ 2 $ — $ 18 There was no Company common stock included in the other postretirement benefit plan assets as of December 31, 2024 and 2023. Concentration of Risk In order to minimize risk, the Pension Plan maintains a listing of permissible and prohibited investments. In addition, the Pension Plan has certain concentration limits and investment quality requirements imposed on permissible investment options. Permissible investments include U.S. equity, international equity, limited partnership and fixed income investments including derivative instruments. Permissible derivative instruments include futures contracts, options, swaps, currency forwards, caps or floors and may be used to control risk or enhance return but will not be used for leverage purposes. Securities specifically prohibited from purchase include, but are not limited to: shares or fixed income instruments issued by The Hartford (other than equity securities purchased on the open market as part of a passively managed strategy), short sales of any type within long-only portfolios, non-derivative securities involving the use of margin, leveraged floaters and inverse floaters, including money market obligations, natural resource real properties such as oil, gas or timber and precious metals. Other than U.S. government and certain U.S. government agencies backed by the full faith and credit of the U.S. government, the Pension Plan does not have any material exposure to any concentration risk of a single issuer. Expected Employer Contributions The Company does not have a 2025 required minimum funding contribution for the U.S. qualified defined benefit pension plan. The Company has not determined whether, and to what extent, contributions may be made to the U.S. qualified defined benefit pension plan in 2025. The Company will monitor the funded status of the U.S. qualified defined benefit pension plan during 2025 to make this determination. Benefit Payments Amounts of Benefits Expected to be Paid over the next Ten Years from Pension and other Postretirement Plans as of December 31, 2024 Pension Benefits Other Postretirement Benefits 2025 $ 249 $ 15 2026 256 13 2027 261 12 2028 267 11 2029 262 11 2030 - 2034 1,304 46 Total $ 2,599 $ 108

Stock Compensation Plans

Stock Compensation Plans	12 Months Ended
	Dec. 31, 2024
Share-Based Payment Arrangement [Abstract]
Stock Compensation Plans	19. STOCK COMPENSATION PLANS The Company's stock-based compensation plans are described below. Shares issued in satisfaction of stock-based compensation may be made available from authorized but unissued shares, shares held by the Company in treasury or from shares purchased in the open market. In 2024, 2023 and 2022, the Company issued shares from treasury in satisfaction of stock-based compensation . The Hartford measures stock compensation at the grant date based on the estimated fair value of the award and recognizes expense on a straight-line basis, net of estimated forfeitures, over the requisite service period. Stock-based compensation expense, included in insurance operating costs and other expenses in the consolidated statement of operations, was as follows: Stock-Based Compensation Expense For the years ended December 31, 2024 2023 2022 Stock-based compensation plans expense $ 133 $ 125 $ 131 Income tax benefit (21) (22) (22) Excess tax benefit on awards vested, exercised and expired (21) (12) (12) Total stock-based compensation plans expense, net of tax $ 91 $ 91 $ 97 The Company did not capitalize any cost of stock-based compensation. As of December 31, 2024, the total compensation cost related to non-vested awards not yet recognized was $75, which is expected to be recognized over a weighted average period of 2 years. Stock Plan Future stock-based awards may be granted under The Hartford's 2020 Stock Incentive Plan (the "Stock Incentive Plan") other than the Subsidiary Stock Plan and the Employee Stock Purchase Plan described below. The Stock Incentive Plan provides for awards to be granted in the form of non-qualified or incentive stock options qualifying under Section 422 of the Internal Revenue Code, stock appreciation rights, performance shares, restricted stock or restricted stock units, or any other form of stock-based award. The maximum number of shares, subject to adjustments set forth in the 2020 Stock Plan, that may be issued to Company employees and third-party service providers during the 10-year duration of the Stock Incentive Plan is the sum of 11,250,000 shares, any shares forfeited subsequent to February 29, 2020, plus any shares used for tax withholding purposes. If any award under an earlier incentive stock plan is forfeited, terminated, surrendered, exchanged, expires unexercised, or is settled in cash in lieu of stock (including to effect tax withholding) or for the net issuance of a lesser number of shares than the number subject to the award, the shares of stock subject to such award (or the relevant portion thereof) shall be available for awards under the Stock Incentive Plan and such shares shall be added to the maximum limit. As of December 31, 2024, there were 6,253,061 shares available for future issuance. The fair values of awards granted under the Stock Incentive Plan are measured as of the grant date and expensed ratably over the awards’ vesting periods, generally three years. For stock awards to retirement-eligible employees, the Company recognizes the expense over a period shorter than the stated vesting period because the employees receive accelerated vesting upon retirement and, therefore, the vesting period is considered non-substantive. Stock Option Awards Under the Stock Incentive Plan, options granted have an exercise price at least equal to the closing stock price on the New York Stock Exchange for the Company’s common stock on the date of grant, and an option’s maximum term is not to exceed 10 years. Options generally become exercisable over a period of three years commencing one year from the date of grant. The Company uses a hybrid lattice/Monte-Carlo based option valuation model (the “Plan Valuation Model”) that incorporates the possibility of early exercise of options into the valuation. The Plan Valuation Model also incorporates the Company’s historical termination and exercise experience to determine the option value. The Plan Valuation Model incorporates ranges of assumptions for inputs, and those ranges are disclosed below. The term structure of volatility is generally constructed utilizing implied volatilities from exchange-traded options, historical volatility of the Company’s stock and other factors. The Company uses historical data to estimate option exercise and employee termination within the Plan Valuation Model, and accommodates variations in employee preference and risk-tolerance by segregating the grantee pool into a series of behavioral cohorts and conducting a fair valuation for each cohort individually. The expected term of options granted is derived from the output of the option Plan Valuation Model and represents, in a mathematical sense, the period of time that options are expected to be outstanding. The risk-free rate for periods within the contractual life of the option is based on the U.S. Constant Maturity Treasury yield curve in effect at the time of grant. Stock Options Valuation Assumptions For the years ended December 31, 2024 2023 2022 Expected dividend yield 1.8% 2.0% 2.3% Expected annualized spot volatility 19.2 % - 22.7% 24.5 % - 26.0% 28.3 % - 29.6% Weighted average annualized volatility 21.7% 25.4% 28.8% Risk-free spot rate 4.3 % - 5.5% 3.8 % - 5.1% (0.04) % - 2.0% Expected term 7.4 years 6.7 years 6.4 years Non-qualified Stock Option Activity Under the Stock Incentive Plan Number of Options (in thousands) Weighted Average Exercise Price Weighted Average Remaining Contractual Term Aggregate Intrinsic Value For the year ended December 31, 2024 Outstanding at beginning of year 6,071 $ 55.92 Granted 270 $ 95.74 Exercised (1,823) $ 50.45 Forfeited — $ — Expired — $ — Outstanding at end of year 4,518 $ 60.51 5.4 $ 221 Outstanding, fully vested and expected to vest 4,494 $ 60.40 5.4 $ 221 Exercisable at end of year 3,711 $ 55.85 4.8 $ 199 Aggregate intrinsic value represents the value of the Company's closing stock price on the last trading day of the period in excess of the exercise price multiplied by the number of options outstanding or exercisable. The aggregate intrinsic value excludes the effect of stock options that have a zero or negative intrinsic value. The weighted average grant-date fair value per share of options granted during the years ended December 31, 2024, 2023, and 2022 was $25.77, $21.09 and $16.56, respectively . For the years ended December 31, 2024, 2023, and 2022 , The Hartford received $92, $47, and $26, respectively, in cash from exercised stock options. The Hartford recognized tax benefits of $4, $3, and $3 on stock options exercised for the years ended December 31, 2024, 2023, and 2022 , respectively. The total intrinsic value of options exercised during the years ended December 31, 2024, 2023 and 2022 was $99, $35, and $24, respectively. Share Awards Share awards granted under the Stock Incentive Plan and outstanding include restricted stock units and performance shares. Performance shares become payable within a range of 0% to 200% of the number of shares initially granted based upon the attainment of specific performance goals achieved at the end of a performance period of three years. For the 2021 grant year only, the grant was subject to a modifier that increased final performance by 10% based upon results against predetermined year-end 2023 representation goals for women and people of color in executive level roles . Performance share awards that are not dependent on market conditions are valued equal to the closing stock price on the New York Stock Exchange for the Company’s common stock on the date of grant. Stock compensation expense for these performance share awards without market conditions is based on a current estimate of the number of awards expected to vest based on the performance level achieved and, therefore, may change during the performance period as new estimates of performance are available. Other performance share awards or portions thereof have a market condition based upon the Company's total stockholder return relative to a pre-determined group of peer companies as of December 31 at the end of the three year performance period. Stock compensation expense for these performance share awards is based on the number of awards expected to vest as estimated at the grant date and, therefore, does not change for changes in estimated performance. The Company uses a risk neutral Monte-Carlo Plan Valuation Model that incorporates time to maturity, implied volatilities of the Company and the peer companies, and correlations between the Company and the peer companies and interest rates. Assumptions for Total Stockholder Return Performance Shares For the years ended December 31, 2024 2023 2022 Volatility of common stock 21.7% 33.0% 35.9% Average volatility of peer companies 20.0 % - 33.0% 26.0 % - 41.0% 27.0 % - 46.0% Average correlation coefficient of peer companies 42.0% 52.0% 68.0% Risk-free spot rate 4.4% 4.4% 1.8% Term 3.0 years 3.0 years 3.0 years Total Share Awards Non-vested Share Award Activity Under the Stock Incentive Plan Restricted Stock Units Performance Shares Number of Shares (in thousands) Weighted-Average Grant-Date Fair Value Number of Shares (in thousands) Weighted-Average Grant date Fair Value Non-vested shares For the year ended December 31, 2024 Non-vested at beginning of year 3,259 $ 65.44 583 $ 77.97 Granted 837 $ 96.34 338 $ 103.08 Performance based adjustment, net 252 $ 71.00 Vested (1,281) $ 53.09 (567) $ 71.30 Forfeited (137) $ 77.97 (12) $ 88.19 Non-vested at end of year 2,678 $ 80.36 594 $ 95.49 In addition to the non-vested shares presented in the above table, there are related non-vested dividend equivalent shares. The number of non-vested dividend equivalent shares related to restricted stock units was 107 thousand and 155 thousand as of December 31, 2024 and 2023, respectively, and the number of non-vested dividend equivalent shares related to performance shares was 14 thousand and 18 thousand as of December 31, 2024 and 2023, respectively. The dividend equivalent shares are subject to the same vesting terms as the restricted stock units and performance shares. The weighted average grant-date fair value per share of restricted stock units granted during the years ended December 31, 2024, 2023, and 2022 was $96.34, $77.72 and $69.32, respectively. The weighted average grant-date fair value per share of performance shares granted during the years ended December 31, 2024, 2023, and 2022 was $103.08, $85.69 and $71.54, respectively. The total fair value of shares vested during the years ended December 31, 2024, 2023 and 2022 was $186, $154 and $134, respectively, based on actual or estimated performance factors. The Company did not make cash payments in settlement of stock compensation during the years ended December 31, 2024, 2023 and 2022. Subsidiary Stock Plan The Hartford has a subsidiary stock-based compensation plan similar to the Stock Incentive Plan, except that it awards non-public subsidiary stock as compensation. The Company recognized stock-based compensation plan expense of $12, $12 and $13 in the years ended December 31, 2024, 2023 and 2022, respectively, for the subsidiary stock plan. Upon employee vesting of subsidiary stock, the Company recognizes a noncontrolling equity interest. Employees are restricted from selling vested subsidiary stock to anyone other than the Company and the Company has discretion on the amount of stock to repurchase. Therefore, the subsidiary stock is classified as equity because it is not mandatorily redeemable. For the years ended December 31, 2024, 2023 and 2022, the Company repurchased $10, $11 and $10, respectively, in subsidiary stock. Employee Stock Purchase Plan The Company sponsors The Hartford Employee Stock Purchase Plan ("ESPP"). Under this plan, eligible employees of The Hartford purchase common stock of the Company at a discount rate of 5% of the market price per share on the last trading day of the offering period. Accordingly, the plan is a non-compensatory plan. Employees purchase a variable number of

Leases Leases

Leases Leases	12 Months Ended
	Dec. 31, 2024
Leases [Abstract]
Leases	20. LEASES The Hartford has operating leases for real estate and equipment. The right-of-use asset as of December 31, 2024 and 2023 was $140 and $141, respectively, and is included in property and equipment, net other liabilities Components of Lease Expense For the years ended December 31, 2024 2023 2022 Operating lease cost $ 35 $ 36 $ 40 Short-term lease cost 1 — — Variable lease cost 1 (2) — Sublease income (3) (4) (4) Total lease costs included in insurance operating costs and other expenses $ 34 $ 30 $ 36 Supplemental Operating Lease Information For the years ended December 31, 2024 2023 2022 Operating cash flows for operating leases (for the twelve months ended) $ 33 $ 37 $ 56 Right-of-use asset obtained in exchange for new operating lease liabilities 25 40 6 Weighted-average remaining lease term in years for operating leases 6 years 7 years 6 years Weighted-average discount rate for operating leases 4.3 % 4.0 % 3.0 % Maturities of Operating Lease Liabilities as of December 31, 2024 Operating Leases 2025 $ 31 2026 29 2027 27 2028 23 2029 19 Thereafter 40 Total lease payments 169 Less: Discount on lease payments to present value 24 Total lease liability $ 145

Restructuring and Related Activ

Restructuring and Related Activities	12 Months Ended
	Dec. 31, 2024
Restructuring and Related Activities [Abstract]
Restructuring and Related Activities Disclosure	21. RESTRUCTURING AND OTHER COSTS In recognition of the need to become more cost efficient and competitive along with enhancing the experience we provide to agents and customers, on July 30, 2020 the Company announced an operational transformation and cost reduction plan it refers to as Hartford Next. Hartford Next is intended to reduce annual insurance operating costs and other expenses through reduction of the Company's headcount, investment in information technology ("IT") to further enhance our capabilities, and other activities. Termination benefits related to workforce reductions and professional fees are included within restructuring and other costs in the Consolidated Statement of Operations and unpaid restructuring costs are included in other liabilities in the Company's Consolidated Balance Sheets. For the years ended December 31, 2023 and December 31, 2022 , the severance benefits accrual was reduced by $6, and $7 respectively, due to more recent experience of higher than expected voluntary attrition. As of December 31, 2024, the program is substantially complete, though the Company may incur additional costs related to real estate that has been temporarily idled as part of Hartford Next. Any other remaining costs, including amortization of right of use assets, other lease exit costs, IT costs to retire applications and other expenses are expected to be immaterial. Total restructuring and other costs, excluding any additional costs related to temporarily idled real estate, are expected to be approximately $127 , before tax, and have been recognized in the Corporate category for segment reporting. Restructuring and Other Costs, Before Tax Incurred in the Year Ended December 31, 2022 Incurred in the Year Ended December 31, 2023 Incurred in the Year Ended December 31, 2024 Cumulative Incurred in the Year Ended December 31, 2024 Total Amount Expected to be Incurred Severance benefits $ (7) $ (6) $ — $ 35 $ 35 IT costs 8 5 — 25 25 Professional fees and other expenses 12 7 2 67 67 Total restructuring and other costs, before tax $ 13 $ 6 $ 2 $ 127 $ 127 Accrued Restructuring and Other Costs Year Ended December 31, 2024 Severance Benefits and Related Costs IT Costs Professional Fees and Other Total Restructuring and Other Costs Liability Balance, beginning of period $ — $ — $ — $ — Incurred — — 2 2 Payments — — (2) (2) Balance, end of period $ — $ — $ — $ — Accrued Restructuring and Other Costs Year Ended December 31, 2023 Severance Benefits and Related Costs IT Costs Professional Fees and Other Total Restructuring and Other Costs Liability Balance, beginning of period $ 7 $ — $ — $ 7 Incurred (6) 5 7 6 Payments (1) (5) (7) (13) Balance, end of period $ — $ — $ — $ —

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2024
Subsequent Events [Abstract]
Subsequent Events	22. Losses from California Wildfires Beginning January 7, 2025, a series of destructive wildfires affected the Los Angeles County area in California. Based on claims reported and other available information, the Company's preliminary loss estimate from these wildfires for the first quarter of 2025, including potential assessments from the California FAIR Plan, is a range of $300 to $350, net of reinsurance and before tax. The estimate is subject to variability due to the timing of reported claims, the extent of damage to personal and commercial property and automobiles, uncertainty of the availability for recoveries, including potential subrogation, and other factors that may not yet be known to the Company. Given these uncertainties, the wildfire losses may deviate from our estimate.

Schedule I Summary of Investmen

Schedule I Summary of Investments - Other Than Investments in Affiliates	12 Months Ended
	Dec. 31, 2024
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Abstract]
Summary of Investments - Other Than Investments in Affiliates	THE HARTFORD INSURANCE GROUP, INC. SCHEDULE I SUMMARY OF INVESTMENTS — OTHER THAN INVESTMENTS IN AFFILIATES (in millions) As of December 31, 2024 Type of Investment Cost Fair Value Amount at Fixed Maturities Bonds and notes U.S. government and government agencies and authorities (guaranteed and sponsored) $ 5,424 $ 4,937 $ 4,937 States, municipalities and political subdivisions 5,574 5,304 5,304 Foreign governments 500 480 480 Public utilities 2,464 2,305 2,305 All other corporate bonds 19,091 18,331 18,331 All other mortgage-backed and asset-backed securities 11,485 11,210 11,210 Total fixed maturities, available-for-sale 44,538 42,567 42,567 Fixed maturities, at fair value using fair value option 324 308 308 Equity Securities [1] Common stocks Industrial, miscellaneous and all other 384 438 438 Non-redeemable preferred stocks 170 165 165 Total equity securities [1] 554 603 603 Mortgage loans [2] 6,440 5,901 6,396 Other investments 252 226 226 Short-term investments 4,068 4,068 4,068 Limited partnerships and other alternative investments [3] 5,042 5,042 Total investments $ 61,218 $ 59,210 [1] Cost of equity securities represents original cost. [2] Cost of mortgage loans excludes the allowance for credit losses ("ACL") of $44. For further information, refer to Schedule V - Valuation and Qualifying Accounts. [3] Cost of limited partnerships and other alternative investments is presented as the carrying value, which is primarily accounted for under the equity method.

Schedule II Condensed Financial

Schedule II Condensed Financial Information of the Hartford Financial Services, Inc.	12 Months Ended
	Dec. 31, 2024
Condensed Financial Information Disclosure [Abstract]
Schedule II Condensed Financial Information of the Hartford Financial Services, Inc.	THE HARTFORD INSURANCE GROUP, INC. SCHEDULE II CONDENSED FINANCIAL INFORMATION OF THE HARTFORD INSURANCE GROUP, INC. (Registrant) (in millions) As of December 31, Condensed Balance Sheets 2024 2023 Assets Fixed maturities, available-for-sale, at fair value (amortized cost of $24 and $29) $ 20 $ 24 Short-term investments 1,290 1,040 Cash — — Investment in affiliates 21,177 20,261 Deferred income taxes 432 439 Unamortized issue costs 1 2 Investment income due and accrued 1 — Other assets 409 400 Total assets $ 23,330 $ 22,166 Liabilities Net payable to affiliates $ 1,967 $ 1,918 Long-term debt 4,366 4,362 Other liabilities 550 559 Total liabilities 6,883 6,839 Stockholders’ Equity Preferred stock $ 334 $ 334 Common stock 3 3 Additional paid-in capital 578 648 Retained Earnings 21,531 19,007 Treasury Stock (3,113) (1,816) Accumulated other comprehensive income (loss), net of tax (2,886) (2,849) Total stockholders’ equity 16,447 15,327 Total liabilities and stockholders’ equity $ 23,330 $ 22,166 The condensed financial statements should be read in conjunction with the consolidated financial statements and notes thereto. THE HARTFORD INSURANCE GROUP, INC. SCHEDULE II CONDENSED FINANCIAL INFORMATION OF THE HARTFORD INSURANCE GROUP, INC. (continued) (Registrant) (in millions) For the years ended December 31, Condensed Statements of Operations and Comprehensive Income (Loss) 2024 2023 2022 Net investment income $ 47 $ 33 $ 13 Net realized gains 4 — — Total revenues 51 33 13 Interest expense 199 199 213 Loss on extinguishment of debt — — 9 Other expense (income) (3) 7 (8) Total expenses 196 206 214 Loss before income taxes and earnings of subsidiaries (145) (173) (201) Income tax benefit (44) (67) (61) Loss before earnings of subsidiaries (101) (106) (140) Earnings of subsidiaries 3,212 2,610 1,959 Net income 3,111 2,504 1,819 Other comprehensive income (loss) - parent company: Change in net gain or loss on cash-flow hedging instruments (3) (7) 45 Change in net unrealized gain or loss on fixed maturities — 1 (4) Change in pension and other postretirement plan adjustments (5) (89) 119 Other comprehensive income (loss), net of taxes before other comprehensive income of subsidiaries (8) (95) 160 Other comprehensive income (loss) of subsidiaries (29) 1,087 (4,129) Total other comprehensive income (loss) (37) 992 (3,969) Total comprehensive income (loss) $ 3,074 $ 3,496 $ (2,150) The condensed financial statements should be read in conjunction with the consolidated financial statements and notes thereto. THE HARTFORD INSURANCE GROUP, INC. SCHEDULE II CONDENSED FINANCIAL INFORMATION OF THE HARTFORD INSURANCE GROUP, INC. (continued) (Registrant) (in millions) For the years ended December 31, Condensed Statements of Cash Flows 2024 2023 2022 Operating Activities Net income $ 3,111 $ 2,504 $ 1,819 Loss on extinguishment of debt — — 9 Dividends received from subsidiaries 1,587 1,594 1,780 Equity in net income of subsidiaries (3,212) (2,610) (1,959) Net realized gains (4) — — Change in operating assets and liabilities 132 75 61 Cash provided by operating activities 1,614 1,563 1,710 Investing Activities Net proceeds from (payments for) short-term investments (250) (208) 899 Proceeds from the sale/maturity/prepayment of: Fixed maturities, available-for-sale 4 97 47 Payments for the purchase of: Equity securities, at fair value — — (5) Net payments for derivatives 2 (8) 55 Capital returned from (contributions to) subsidiaries 704 503 (6) Cash provided by investing activities 460 384 990 Financing Activities Repayments of debt — — (600) Treasury stock acquired, including related excise tax paid (1,514) (1,400) (1,550) Net issuance (return of) shares under incentive and stock compensation plans, including related excise tax benefit 22 6 (19) Dividends paid on common shares (561) (532) (510) Dividends paid on preferred shares (21) (21) (21) Cash used for financing activities (2,074) (1,947) (2,700) Net increase (decrease) in cash — — — Cash — beginning of period — — — Cash — end of period $ — $ — $ — Supplemental Disclosure of Cash Flow Information Interest Paid $ 211 $ 209 $ 212 The condensed financial statements should be read in conjunction with the consolidated financial statements and notes thereto.

Schedule III Supplementary Insu

Schedule III Supplementary Insurance Information	12 Months Ended
	Dec. 31, 2024
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Abstract]
Schedule III Supplementary Insurance Information	THE HARTFORD INSURANCE GROUP, INC. SCHEDULE III SUPPLEMENTARY INSURANCE INFORMATION ( in millions ) Segment/Category Deferred Policy Acquisition Costs Unpaid Losses and Loss Adjustment Expenses Reserve for Future Policy Benefits Unearned Premiums Other Policyholder Funds and Benefits Payable As of December 31, 2024 Business Insurance $ 1,093 $ 31,381 $ — $ 7,638 $ — Personal Insurance 113 2,239 — 1,728 — Property & Casualty Other Operations — 2,784 — 2 — Employee Benefits 33 8,206 290 40 401 Hartford Funds — — — — — Total Reportable Segments 1,239 44,610 290 9,408 401 Corporate — — 158 — 213 Consolidated $ 1,239 $ 44,610 $ 448 $ 9,408 $ 614 As of December 31, 2023 Business Insurance $ 976 $ 29,181 $ — $ 6,977 $ — Personal Insurance 102 2,068 — 1,582 — Property & Casualty Other Operations — 2,795 — 2 — Employee Benefits 35 8,274 312 38 408 Hartford Funds — — — — — Total Reportable Segments 1,113 42,318 312 8,599 408 Corporate — — 172 — 230 Consolidated $ 1,113 $ 42,318 $ 484 $ 8,599 $ 638 THE HARTFORD INSURANCE GROUP, INC. SCHEDULE III SUPPLEMENTARY INSURANCE INFORMATION (continued) (in millions) Segment/Category Earned Premiums, Fee Income and Other Net Investment Income Benefits, Losses and Loss Adjustment Expenses Amortization of Insurance Net Written Premiums [2] For the year December 31, 2024 Business Insurance $ 12,765 $ 1,714 $ 7,441 $ 1,993 $ 2,047 $ 13,351 Personal Insurance 3,571 222 2,525 255 742 3,598 Property & Casualty Other Operations — 74 219 — 13 — Employee Benefits 6,615 475 4,681 34 1,649 — Hartford Funds 1,035 20 — — 824 — Total Reportable Segments 23,986 2,505 14,866 2,282 5,275 16,949 Corporate 42 63 8 — 255 — Consolidated $ 24,028 $ 2,568 $ 14,874 $ 2,282 $ 5,530 $ 16,949 For the year December 31, 2023 Business Insurance $ 11,683 $ 1,532 $ 6,786 $ 1,779 $ 1,907 $ 12,279 Personal Insurance 3,198 171 2,538 231 638 3,198 Property & Casualty Other Operations — 69 224 — 4 — Employee Benefits 6,515 469 4,683 34 1,554 — Hartford Funds 973 17 — — 781 — Total Reportable Segments 22,369 2,258 14,231 2,044 4,884 15,477 Corporate 41 47 7 — 273 — Consolidated $ 22,410 $ 2,305 $ 14,238 $ 2,044 $ 5,157 $ 15,477 For the year December 31, 2022 Business Insurance $ 10,609 $ 1,415 $ 6,169 $ 1,563 $ 1,857 $ 11,158 Personal Insurance 3,052 140 2,164 228 652 2,961 Property & Casualty Other Operations — 63 280 — 9 — Employee Benefits 6,057 524 4,517 33 1,507 — Hartford Funds 1,044 9 — — 826 — Total Reportable Segments 20,762 2,151 13,130 1,824 4,851 14,119 Corporate 50 26 8 — 287 — Consolidated $ 20,812 $ 2,177 $ 13,138 $ 1,824 $ 5,138 $ 14,119 [1] Includes interest expense, loss on extinguishment of debt, restructuring and other costs, loss on reinsurance transaction and amortization of intangible assets. [2] Excludes life insurance pursuant to Regulation S-X.

Schedule IV Reinsurance

Schedule IV Reinsurance	12 Months Ended
	Dec. 31, 2024
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Abstract]
Schedule IV Reinsurance	THE HARTFORD INSURANCE GROUP, INC. SCHEDULE IV REINSURANCE (in millions) Gross Amount Ceded Amount Assumed From Other Companies Net Amount Percentage of Amount Assumed to Net For the year ended December 31, 2024 Life insurance in-force $ 1,301,304 $ 35,266 $ 25,362 $ 1,291,400 2 % Insurance revenues Property and casualty insurance $ 16,915 $ 1,742 $ 1,001 $ 16,174 6 % Life insurance and annuities 2,582 41 76 2,617 3 % Accident and health insurance 3,994 86 90 3,998 2 % Total insurance revenues $ 23,491 $ 1,869 $ 1,167 $ 22,789 5 % For the year ended December 31, 2023 Life insurance in-force $ 1,275,984 $ 33,009 $ 23,605 $ 1,266,580 2 % Insurance revenues Property and casualty insurance $ 15,514 $ 1,612 $ 826 $ 14,728 6 % Life insurance and annuities 2,540 33 76 2,583 3 % Accident and health insurance 3,905 71 98 3,932 2 % Total insurance revenues $ 21,959 $ 1,716 $ 1,000 $ 21,243 5 % For the year ended December 31, 2022 Life insurance in-force $ 1,147,723 $ 23,330 $ 22,511 $ 1,146,904 2 % Insurance revenues Property and casualty insurance $ 14,328 $ 1,462 $ 654 $ 13,520 5 % Life insurance and annuities 2,341 25 77 2,393 3 % Accident and health insurance 3,647 81 98 3,664 3 % Total insurance revenues $ 20,316 $ 1,568 $ 829 $ 19,577 4 %

Schedule V Valuation and Qualif

Schedule V Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2024
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Schedule V Valuation and Qualifying Accounts	THE HARTFORD INSURANCE GROUP, INC. SCHEDULE V VALUATION AND QUALIFYING ACCOUNTS (in millions) Balance Increase (decrease) in Costs and Expenses Write-offs/ Payments/ Other Balance December 31, 2024 ACL on fixed maturities, available-for-sale $ 21 $ 2 $ (7) $ 16 ACL on mortgage loans $ 51 $ (3) $ (4) $ 44 ACL on premiums receivable and agents' balances $ 109 $ 65 $ (57) $ 117 Allowance for uncollectible reinsurance $ 103 $ (11) $ (17) $ 75 Valuation allowance for deferred taxes $ 12 $ — $ (12) $ — 2023 ACL on fixed maturities, available-for-sale $ 12 $ 14 $ (5) $ 21 ACL on mortgage loans $ 36 $ 15 $ — $ 51 ACL on premiums receivable and agents' balances $ 109 $ 50 $ (50) $ 109 Allowance for uncollectible reinsurance $ 105 $ 14 $ (16) $ 103 Valuation allowance for deferred taxes $ 27 $ — $ (15) $ 12 2022 ACL on fixed maturities, available-for-sale $ 1 $ 18 $ (7) $ 12 ACL on mortgage loans $ 29 $ 7 $ — $ 36 ACL on premiums receivable and agents' balances $ 105 $ 51 $ (47) $ 109 Allowance for uncollectible reinsurance $ 99 $ 3 $ 3 $ 105 Valuation allowance for deferred taxes $ 7 $ 20 $ — $ 27

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pay vs Performance Disclosure
Net income (loss)	$ 3,111	$ 2,504	$ 1,819

Insider Trading Arrangements

Insider Trading Arrangements - shares		3 Months Ended
	Nov. 04, 2024	Dec. 31, 2024
Trading Arrangements, by Individual
Non-Rule 10b5-1 Arrangement Adopted		false
Rule 10b5-1 Arrangement Terminated		false
Non-Rule 10b5-1 Arrangement Terminated		false
Christopher J. Swift [Member]
Trading Arrangements, by Individual
Name		Christopher J. Swift
Title		Chairman and Chief Executive Officer
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	November 4, 2024
Adin M. Tooker [Member]
Trading Arrangements, by Individual
Arrangement Duration		245 days
Tranche One [Member] | Christopher J. Swift [Member]
Trading Arrangements, by Individual
Aggregate Available		294,481
Tranche One [Member] | Michael R. Fisher [Member]
Trading Arrangements, by Individual
Arrangement Duration		259 days
Tranche Two [Member] | Michael R. Fisher [Member]
Trading Arrangements, by Individual
Arrangement Duration		137 days

Cybersecurity Risk Management a

Cybersecurity Risk Management and Strategy Disclosure	12 Months Ended
	Dec. 31, 2024
Cybersecurity Risk Management, Strategy, and Governance [Line Items]
Cybersecurity Risk Management Processes Integrated [Flag]	true
Cybersecurity Risk Management Processes Integrated [Text Block]	The Hartford has implemented an information protection program with established governance routines for assessing and managing risks. The Hartford employs a ‘defense-in-depth’ strategy that uses multiple security measures to protect the integrity of the Company's information assets. This ‘defense-in-depth’ strategy aligns to the National Institute of Standards and Technology Cybersecurity Framework, where controls are implemented throughout our environments to achieve the six categorical objectives of governance, identification, protection, detection, response and recovery. Our 'defense in depth' program uses several methods to protect against intrusion by a bad actor, including such techniques as reputational filtering, anti-virus scans, intrusion prevention, multi-factor authentication, and account isolation among others. We also use numerous approaches to detect ransomware and other cyber attacks, including, among others, dark web searches, email sandboxing, endpoint detection, and intrusion detection. The Hartford continues to monitor and enhance its framework to respond to evolving cyber threats and regulations for data privacy, including the European Union General Data Protection Regulation, the California Consumer Privacy Act and the New York Department of Financial Services Cybersecurity Regulation. We regularly assess our programs and control environment, leveraging externally conducted cyber tests and evaluations along with internally managed cyber risk assessments and testing. Additionally, the Company collaborates with industry associations, government authorities and external advisors to monitor the threat environment and to inform our security practices. In connection with regular assessments of third-party service providers, our information protection team performs an assessment of each vendor’s information security practices and protocols, including its readiness to protect against and respond to cybersecurity breaches. Third-party service providers are categorized in tiers depending on the significance of their operations to the Company’s business processes and risk assessments for vendors in the highest tier are completed periodically. With respect to cyber, we have procedures to verify each service provider’s information security controls, and each vendor completes a cyber questionnaire that also addresses their resiliency in the event of an intrusion to their systems. We proactively communicate with suppliers to understand mitigation steps taken when major cyber exposures are identified.
Cybersecurity Risk Management Third Party Engaged [Flag]	true
Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]	true
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]	false
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Text Block]	To the best knowledge of Management, no risks from cybersecurity threats have materially affected or are reasonably likely to materially affect the Company, including its business strategy, results of operations, or financial condition.
Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]	From a governance perspective, senior members of our Enterprise Risk Management, Information Protection and Internal Audit functions provide detailed, regular reports on cybersecurity matters to the Board of Directors, primarily through the Audit Committee, which oversees controls for the Company's major risk exposures and has principal responsibility for oversight of cybersecurity risk, and the Finance, Investment and Risk Management Committee ("FIRMCo"), which oversees business risk related to cyber insurance products. The topics covered by these updates include the Company's activities, policies and procedures to prevent, detect and respond to cybersecurity incidents, as well as lessons learned from cybersecurity incidents and internal and external testing of our cyber defenses.
Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]	The Audit Committee is provided with updates on technology and cybersecurity risks at least four times annually, including annual reviews of the Company's cybersecurity program and technology risks and controls, and bi-annual updates on operational risks (in spring and fall). Given its importance, the full Board of Directors is invited to attend the annual cybersecurity program update and time is reserved at each Audit Committee meeting for cybersecurity technology matters that warrant discussion between the standing sessions. In addition, Enterprise Risk Management provides FIRMCo an assessment of cyber insurance risk once per year. The Audit Committee, FIRMCo and the full Board of Directors are apprised of developments in the external environment and business strategies that present additional potential cyber risk exposure to the Company on an as-needed basis. As a result, cybersecurity and cyber risk are typically discussed more frequently than the annual minimum requirements.
Cybersecurity Risk Role of Management [Text Block]	provide detailed, regular reports on cybersecurity matters
Cybersecurity Risk Management Positions or Committees Responsible [Flag]	true
Cybersecurity Risk Management Positions or Committees Responsible [Text Block]	From a governance perspective, senior members of our Enterprise Risk Management, Information Protection and Internal Audit functions provide detailed, regular reports on cybersecurity matters to the Board of Directors, primarily through the Audit Committee, which oversees controls for the Company's major risk exposures and has principal responsibility for oversight of cybersecurity risk, and the Finance, Investment and Risk Management Committee ("FIRMCo"), which oversees business risk related to cyber insurance products.
Cybersecurity Risk Management Expertise of Management Responsible [Text Block]	Both the CIO and the CISO have expertise assessing and managing cybersecurity risks. The CIO has served in her current role since 2019 and served in similar technology leadership roles before her current role. She has nineteen years of executive leadership experience in the financial services industry and twenty-nine years of overall technology experience, during which time she has led large scale business transformation, delivered innovative technology strategies and has overseen and modernized complex technology portfolios. The CISO has held several senior-level information technology roles in his twenty-six-year tenure with the Company and has served in his current role since 2021. In his various roles, he has been responsible for providing senior leadership in the areas of information security, IT governance risk & compliance, business continuity, and disaster recovery.
Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]	The EPSC receives a monthly written executive briefing on topics, and with metrics related to cybersecurity, including incident prevention, detection, mitigation and remediation. Quarterly, the Information Technology ("IT') Risk Council, made up of senior IT leaders, is also provided with an update of cybersecurity risks and preparedness. Various other meetings are held on cybersecurity topics periodically, including monthly business operating reviews, and meetings of the Enterprise Risk and Capital Committee ("ERCC") and executive leadership team.
Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]	true

Significant Accounting (Policie

Significant Accounting (Policies)	12 Months Ended
	Dec. 31, 2024
Accounting Policies [Abstract]
Basis of Presentation	The Hartford Insurance Group, Inc. ("HIG") is a holding company for insurance and financial services subsidiaries that provide property and casualty ("P&C") insurance, employee group benefits insurance and services and mutual funds and exchange-traded funds ("ETF") to individual and business customers in the United States as well as in the United Kingdom and other international locations (collectively, “The Hartford”, the “Company”, “we” or “our”). Previously known as The Hartford Financial Services Group, Inc., the Company changed its name to The Hartford Insurance Group, Inc. on February 6, 2025. The Hartford conducts business principally in five reportable segments including Business Insurance (formerly "Commercial Lines"), Personal Insurance (formerly "Personal Lines"), Property & Casualty Other Operations, Employee Benefits (formerly "Group Benefits") and Hartford Funds, as well as a Corporate category.
Consolidation	Consolidation
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The most significant estimates include those used in determining property and casualty and group long-term disability ("LTD") insurance product reserves, net of reinsurance; evaluation of goodwill for impairment; valuation of investments and derivative instruments; and contingencies relating to corporate litigation and regulatory matters.
Commitments and Contingencies, Policy	Management evaluates each contingent matter separately. A loss is recorded if probable and reasonably estimable. Management establishes liabilities for these contingencies at its “best estimate,” or, if no one number within the range of possible losses is more probable than any other, the Company records an estimated liability at the low end of the range of losses.
Fair Value Measurement, Policy	The Company carries certain financial assets and liabilities at estimated fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market in an orderly transaction between market participants. Our fair value framework includes a hierarchy that gives the highest priority to the use of quoted prices in active markets, followed by the use of market observable inputs, followed by the use of unobservable inputs. The fair value hierarchy levels are as follows: Level 1 Fair values based on unadjusted quoted prices for identical assets or liabilities, in active markets that the Company has the ability to access at the measurement date. Level 2 Fair values primarily based on observable inputs, other than quoted prices included in Level 1, or based on prices for similar assets and liabilities. Level 3 Fair values derived when one or more of the significant inputs are unobservable (including assumptions about risk). With little or no observable market, the determination of fair values uses considerable judgment and represents the Company’s best estimate of an amount that could be realized in a market exchange for the asset or liability. Also included are securities that are traded within illiquid markets and/or priced by independent brokers. The Company will classify the financial asset or liability by level based upon the lowest level input that is significant to the determination of the fair value. In most cases, both observable inputs (e.g., changes in interest rates) and unobservable inputs (e.g., changes in risk assumptions) are used to determine fair values that the Company has classified within Level 3.
Fair Value of Financial Instruments, Policy	Valuation Techniques The Company generally determines fair values using valuation techniques that use prices, rates, and other relevant information evident from market transactions involving identical or similar instruments. Valuation techniques also include, where appropriate, estimates of future cash flows that are converted into a single discounted amount using current market expectations. The Company uses a "waterfall" approach comprised of the following pricing sources and techniques, which are listed in priority order: • Quoted prices, unadjusted, for identical assets or liabilities in active markets, which are classified as Level 1. • Prices from third-party pricing services, which primarily utilize a combination of techniques. These services utilize recently reported trades of identical, similar, or benchmark securities making adjustments for market observable inputs available through the reporting date. If there are no recently reported trades, they may use a discounted cash flow technique to develop a price using expected cash flows based upon the anticipated future performance of the underlying collateral discounted at an estimated market rate. Both techniques develop prices that consider the time value of future cash flows and provide a margin for risk, including liquidity and credit risk. Most prices provided by third-party pricing services are classified as Level 2 because the inputs used in pricing the securities are observable. However, some securities that are less liquid or trade less actively are classified as Level 3. Additionally, certain long-dated securities include benchmark interest rate or credit spread assumptions that are not observable in the marketplace and are thus classified as Level 3. • Internal matrix pricing is a valuation process internally developed for private placement securities for which the Company is unable to obtain a price from a third-party pricing service. Internal pricing matrices determine credit spreads that, when combined with risk-free rates, are applied to contractual cash flows to develop a price. The Company develops credit spreads using market based data for public securities adjusted for credit spread differentials between public and private securities, which are obtained from a survey of multiple private placement brokers. The market-based reference credit spread considers the issuer’s sector, financial strength, and term to maturity, using an independent public security index, while the credit spread differential considers the non-public nature of the security. Securities priced using internal matrix pricing are classified as Level 2 because the significant inputs are observable or can be corroborated with observable data. • Independent broker quotes, which are typically non-binding, use inputs that can be difficult to corroborate with observable market based data. Brokers may use present value techniques using assumptions specific to the security types, or they may use recent transactions of similar securities. Due to the lack of transparency in the process that brokers use to develop prices, valuations that are based on independent broker quotes are classified as Level 3. The fair value of derivative instruments is determined primarily using a discounted cash flow model or option model technique and incorporates counterparty credit risk. In some cases, quoted market prices for exchange-traded and OTC cleared derivatives may be used and in other cases independent broker quotes may be used. The pricing valuation models primarily use inputs that are observable in the market or can be corroborated by observable market data. The valuation of certain derivatives may include significant inputs that are unobservable, such as volatility levels, and reflect the Company’s view of what other market participants would use when pricing such instruments. Valuation Controls The process for determining the fair value of investments is monitored by the Valuation Committee, which is a cross-functional group of senior management within the Company. The purpose of the Valuation Committee is to provide oversight of the pricing policy, procedures and controls, including approval of valuation methodologies and pricing sources. The Valuation Committee reviews market data trends, pricing statistics and trading statistics to ensure that prices are reasonable and consistent with our fair value framework. Controls and procedures used to assess third-party pricing services are reviewed by the Valuation Committee, including the results of annual due-diligence reviews. Controls include, but are not limited to, reviewing daily and monthly price changes, stale prices, and missing prices and comparing new trade prices to third-party pricing services, weekly price changes to published bond index prices, and daily OTC derivative market valuations to counterparty valuations. The Company has a dedicated pricing group that works with trading and investment professionals to challenge prices received by a third party pricing source if the Company believes that the valuation received does not accurately reflect the fair value. New valuation models and changes to current models require approval by the Valuation Committee. In addition, the Company’s enterprise-wide Operational Risk Management function provides an independent review of the suitability and reliability of model inputs, as well as an analysis of significant changes to current models. Valuation Inputs Quoted prices for identical assets in active markets are considered Level 1 and consist of on-the-run U.S. Treasuries, money market funds, exchange-traded equity securities, open-ended mutual funds, certain short-term investments, and exchange traded derivative instruments. Valuation Inputs Used in Levels 2 and 3 Measurements for Securities and Derivatives Level 2 Primary Observable Inputs Level 3 Primary Unobservable Inputs Fixed Maturity Investments Structured securities (includes ABS, CLOs, CMBS and RMBS) • Benchmark yields and spreads Other inputs for ABS, CLOs, and RMBS: • Independent broker quotes • Credit spreads beyond observable curve • Interest rates beyond observable curve Other inputs for less liquid securities or those that trade less actively, including subprime RMBS: • Estimated cash flows • Credit spreads, which include illiquidity premium • Constant prepayment rates • Constant default rates • Loss severity Corporates • Benchmark yields and spreads Other inputs for investment grade privately placed securities that utilize internal matrix pricing: • Independent broker quotes Other inputs for below investment grade privately placed securities and private bank loans: U.S. Treasuries, Municipals, and Foreign government/government agencies • Benchmark yields and spreads • Issuer credit default swap curves • Political events in emerging market economies • Municipal Securities Rulemaking Board reported trades and material event notices • Issuer financial statements • Credit spreads beyond observable curve • Interest rates beyond observable curve Equity Securities • Quoted prices in markets that are not active • For privately traded equity securities, internal discounted cash flow models utilizing earnings multiples or other cash flow assumptions that are not observable Short-term Investments • Benchmark yields and spreads • Reported trades, bids, offers • Issuer spreads and credit default swap curves • Material event notices and new issue money market rates • Independent broker quotes Derivatives Credit derivatives • Swap yield curve • Credit default swap curves • Not applicable Foreign exchange derivatives • Swap yield curve • Currency spot and forward rates • Cross currency basis curves • Not applicable Interest rate derivatives • Swap yield curve • Not applicable Equity derivatives • Equity index levels • Not applicable
Derivatives	Derivative Instruments Overview The Company utilizes a variety of over-the-counter ("OTC") derivatives, derivatives cleared through central clearing houses ("OTC-cleared") and exchange traded derivative instruments as part of its overall risk management strategy as well as to engage in income generation covered call transactions and replication transactions. The types of instruments may include swaps, caps, floors, forwards, futures and options to achieve the following Company-approved objectives: • to hedge risk arising from interest rate, equity market, commodity market, credit spread and issuer default, price or currency exchange rates or volatility; • to manage liquidity; • to control transaction costs; and • to enter into income generation covered call transactions and synthetic replication transactions. Interest rate and credit default swaps involve the periodic exchange of cash flows with other parties, at specified intervals, calculated using agreed upon rates or other financial variables and notional principal amounts. Generally, little to no cash or principal payments are exchanged at the inception of the contract. Typically, at the time a swap is entered into, the cash flow streams exchanged by the counterparties are equal in value. The Company clears certain interest rate swap and credit default swap derivative transactions through central clearing houses. OTC-cleared derivatives require initial collateral at the inception of the trade in the form of cash or highly liquid securities, such as U.S. Treasuries and government agency investments. Central clearing houses also require additional cash as variation margin based on daily market value movements. For information on collateral, see the Derivative Collateral Arrangements section in Note 6 - Derivatives. In addition, OTC-cleared transactions include price alignment amounts either received or paid on the variation margin, which is characterized as interest and reflected in net investment income. Forward contracts are customized commitments that specify a rate of interest or currency exchange rate to be paid or received on an obligation beginning on a future start date and are typically settled in cash. Financial futures are standardized commitments to either purchase or sell designated financial instruments, at a future date, for a specified price and may be settled in cash or through delivery of the underlying instrument. Futures contracts trade on organized exchanges. Margin requirements for futures are met by pledging securities or cash, and changes in the futures’ contract values are settled daily in cash. Option contracts grant the purchaser, for a premium payment, the right to either purchase from or sell to the issuer a financial instrument at a specified price, within a specified period or on a stated date. The contracts may reference commodities, which grant the purchaser the right to either purchase from or sell to the issuer commodities at a specified price, within a specified period or on a stated date. Option contracts are typically settled in cash. Foreign currency swaps exchange an initial principal amount in two currencies, agreeing to re-exchange the currencies at a future date, at an agreed upon exchange rate. There may also be a periodic exchange of payments at specified intervals calculated using the agreed upon rates and exchanged principal amounts. The Company’s derivative transactions conducted in insurance company subsidiaries are used in strategies permitted under the derivative use plans required by the State of Connecticut, the State of Illinois and the State of New York insurance regulators. Accounting and Financial Statement Presentation of Derivative Instruments and Hedging Activities Derivative instruments are recognized on the Consolidated Balance Sheets at fair value and are reported in Other Investments and Other Liabilities On the date the derivative contract is entered into, the Company designates the derivative as (1) a hedge of the fair value of a recognized asset or liability (“fair value” hedge), (2) a hedge of the variability in cash flows of a forecasted transaction or of amounts to be received or paid related to a recognized asset or liability (“cash flow” hedge), (3) a hedge of a net investment in a foreign operation (“net investment” hedge) or (4) held for other investment and/or risk management purposes, which primarily involve managing asset or liability related risks and do not qualify for hedge accounting. The Company currently does not designate any derivatives as fair value or net investment hedges. Cash Flow Hedges - Changes in the fair value of a derivative that is designated and qualifies as a cash flow hedge, including foreign-currency cash flow hedges, are recorded in AOCI and are reclassified into earnings when the variability of the cash flow of the hedged item impacts earnings. Gains and losses on derivative contracts that are reclassified from AOCI to current period earnings are included in the line item in the Consolidated Statements of Operations in which the cash flows of the hedged item are recorded. Periodic derivative net coupon settlements are recorded in the line item of the Consolidated Statements of Operations in which the cash flows of the hedged item are recorded. Cash flows from cash flow hedges are presented in the same category as the cash flows from the items being hedged in the Consolidated Statement of Cash Flows. Other Investment and/or Risk Management Activities - The Company’s other investment and/or risk management activities primarily relate to strategies used to reduce economic risk or replicate permitted investments and do not receive hedge accounting treatment. Changes in the fair value, including periodic derivative net coupon settlements, of derivative instruments held for other investment and/or risk management purposes are reported in current period earnings as net realized gains and losses. Hedge Documentation and Effectiveness Testing To qualify for hedge accounting treatment, a derivative must be highly effective in mitigating the designated changes in fair value or cash flows of the hedged item. At hedge inception, the Company formally documents all relationships between hedging instruments and hedged items, as well as its risk-management objective and strategy for undertaking each hedge transaction. The documentation process includes linking derivatives that are designated as fair value, cash flow, or net investment hedges to specific assets or liabilities on the balance sheet or to specific forecasted transactions and defining the effectiveness testing methods to be used. The Company also formally assesses both at the hedge’s inception and ongoing on a quarterly basis, whether the derivatives that are used in hedging transactions have been and are expected to continue to be highly effective in offsetting changes in fair values, cash flows or net investment in foreign operations of hedged items. Hedge effectiveness is assessed primarily using quantitative methods as well as using qualitative methods. Quantitative methods include regression or other statistical analysis of changes in fair value or cash flows associated with the hedge relationship. Qualitative methods may include comparison of critical terms of the derivative to the hedged item. Discontinuance of Hedge Accounting The Company discontinues hedge accounting prospectively when (1) it is determined that the qualifying criteria are no longer met; (2) the derivative is no longer designated as a hedging instrument; or (3) the derivative expires or is sold, terminated or exercised. When cash flow hedge accounting is discontinued because the Company becomes aware that it is not probable that the forecasted transaction will occur, the derivative continues to be carried on the balance sheet at its fair value, and gains and losses that were accumulated in AOCI are recognized immediately in earnings. In other situations in which hedge accounting is discontinued, including those where the derivative is sold, terminated or exercised, amounts previously deferred in AOCI are reclassified into earnings when earnings are impacted by the hedged item. Embedded Derivatives The Company may purchase investments that contain embedded derivative instruments. When it is determined that (1) the embedded derivative possesses economic characteristics that are not clearly and closely related to the economic characteristics of the host contract and (2) a separate instrument with the same terms would qualify as a derivative instrument, the embedded derivative is bifurcated from the host for measurement purposes. The embedded derivative, which is reported with the host instrument in the Consolidated Balance Sheets, is carried at fair value with changes in fair value reported in net realized gains and losses. Credit Risk of Derivative Instruments Credit risk is defined as the risk of financial loss due to uncertainty of an obligor’s or counterparty’s ability or willingness to meet its obligations in accordance with agreed upon terms. Credit exposures are measured using the market value of the derivatives, resulting in amounts owed to the Company by its counterparties or potential payment obligations from the Company to its counterparties. The Company generally requires that OTC derivative contracts, other than certain forward contracts, be governed by International Swaps and Derivatives Association agreements which are structured by legal entity and by counterparty, and permit right of offset. Some agreements require daily collateral settlement based upon agreed upon thresholds. For purposes of daily derivative collateral maintenance, credit exposures are generally quantified based on the prior business day’s market value and collateral is pledged to and held by, or on behalf of, the Company to the extent the current value of the derivatives is greater than zero, subject to minimum transfer thresholds, if applicable. The Co mpany also minimizes the credit risk of derivative instruments by entering into transactions with high quality counterparties primarily rated A or better, which are monitored and evaluated by the Company’s risk management team and reviewed by senior management. OTC-cleared derivatives are governed by clearing house rules. Transactions cleared through a central clearing house reduce risk due to their ability to require daily variation margin and act as an independent valuation source. In addition, the Company monitors counterparty credit exposure on a monthly basis to ensure compliance with Company policies and statutory limitations.
Adoption of New Accounting Standards	Adoption of New Accounting Standards Segment Disclosures O n December 31, 2024, the Company adopted the Financial Accounting Standards Board’s (“FASB”) new guidance on Segment Reporting
Description of New Accounting Pronouncements Not yet Adopted [Text Block]	Future Adoption of New Accounting Standards Income Tax Disclosures The FASB issued new disclosure requirements for income taxes primarily for the income tax rate reconciliation and income taxes paid Disaggregated Income Statement Expenses The FASB issued new guidance on disclosures of disaggregated income statement expenses a prospective basis
Revenue Recognition	Revenue Recognition Premium Revenue from Direct Insurance and Assumed Reinsurance Property and casualty premiums are earned on a pro rata basis over the policy period and include accruals for policies that have been written by agents but not yet reported to us, as well as ultimate premium revenue anticipated under auditable and retrospectively rated policies. We estimate the amount of premium not yet reported based on current and historical trends of the business being written. Such estimates are regularly reviewed and updated and any resulting adjustments are included in the current year's results. Unearned premiums represent the premiums applicable to the unexpired terms of policies in force, or period of risk. Group life, disability and accident premiums are generally due from policyholders, and recognized as revenue, on a pro rata basis over the period of the contracts. An estimated ACL is recorded on the basis of periodic evaluations of balances due from insureds and considering historical credit loss information, adjusted for current economic conditions as well as reasonable and supportable forecasts when appropriate. The Company records total credit loss expenses related to premiums receivable in insurance operating costs and other expenses. Write-offs of premiums receivable and agents' balances and any related ACL are recorded in the period in which the balance is deemed uncollectible. Refer to Note 7 - Premiums Receivable and Agents' Balances for further discussion regarding the allowance for doubtful accounts included in premiums receivable and agents’ balances. Non-Insurance Revenue from Contracts with Customers Installment fees are charged on property and casualty insurance contracts for billing the insurance customer in installments over the policy term. These fees are recognized in fee income as earned on collection. Insurance servicing revenues within Personal Insurance consist of up-front commissions earned for collecting premiums and processing claims on insurance policies for which The Hartford does not assume underwriting risk, predominantly related to the National Flood Insurance Plan program. These insurance servicing revenues are recognized in other revenues over the period of the flood program's policy terms. Employee Benefits earns fee income from employers for the administration of underwriting, implementation and claims processing for employer self-funded plans and for leave management services. Fees are recognized as services are provided and collected monthly. Hartford Funds provides investment management, administrative and distribution services to mutual funds and exchange-traded funds. The Company assesses investment advisory, distribution and other asset management fees primarily based on the average daily net asset values from mutual funds and exchange-traded funds, which are recorded in the period in which the services are provided and are collected monthly. Fluctuations in domestic and international markets and related investment performance, volume and mix of sales and redemptions of mutual funds or exchange-traded funds, and other changes to the composition of assets under management ("AUM") are all factors that ultimately have a direct effect on fee income earned. Corporate investment management and other fees are primarily for managing third party invested assets. These fees, calculated based on the average quarterly net asset values, are recorded in the period in which the services are provided and are collected quarterly. Fluctuations in markets and interest rates and other changes to the composition of assets under management are all factors that ultimately have a direct effect on fee income earned.
Dividends to Policyholders	Dividends to Policyholders Policyholder dividends are paid to certain property and casualty policyholders. Policies that receive dividends are referred to as participating policies. Participating dividends to policyholders are accrued and reported in insurance operating costs and other expenses and other liabilities using an estimate of the amount to be paid based on underlying contractual obligations under policies and applicable state laws. Net written premiums for participating property and casualty insurance policies represented 6%, 6%, and 7% of total net written premiums for each of the years ended December 31, 2024, 2023 and 2022, respectively. Participating dividends to property and casualty policyholders were $39, $39 and $29 for the years ended December 31, 2024, 2023 and 2022, respectively. There were no additional amounts of income allocated to participating policyholders.
Investments	Investments Overview The Company’s investments in fixed maturities consist of bonds, including structured securities, and redeemable preferred stock. Most of these investments are classified as AFS and are carried at fair value. The after tax difference between fair value and cost or amortized cost is reflected in stockholders’ equity as a component of AOCI. Fixed maturities for which the Company elected the fair value option are classified as FVO and are carried at fair value with changes in value recorded in net realized gains and losses. These investments represent certain investments in residual interests of securitizations and other securities that contain embedded credit derivatives. Equity securities are measured at fair value with any changes in valuation reported in net realized gains and losses. Mortgage loans are recorded at the outstanding principal balance adjusted for amortization of premiums or discounts and net of an ACL. Short-term investments are carried at amortized cost, which approximates fair value. Limited partnerships and other alternative investments are reported at their carrying value and are primarily accounted for under the equity method with the Company’s share of earnings included in net investment income. Recognition of income related to limited partnerships and other alternative investments is delayed due to the availability of the related financial information, as private equity and other funds are generally received on a three-month delay. Accordingly, income for the years ended December 31, 2024, 2023, and 2022 may not include the full impact of current year changes in valuation of the underlying assets and liabilities of the funds, which are generally obtained from the limited partnerships. Other investments primarily consist of equity fund investments measured at fair value, overseas deposits which are measured at fair value using the net asset value as a practical expedient, consolidated investment funds for which the Company has provided seed money and reports the underlying investments at fair value with changes in the fair value recognized in income consistent with accounting requirements for investment companies, and derivative instruments which are carried at fair value. Net Realized Gains and Losses Net realized gains and losses from investment sales are reported as a component of revenues and are determined on a specific identification basis. Net realized gains and losses also result from fair value changes in equity securities, FVO securities, and derivatives contracts that do not qualify, or are not designated, as a hedge for accounting purposes. The Company records net credit losses on fixed maturities, AFS and changes in the ACL on mortgage loans as a component of net realized gains and losses. Future changes in the ACL resulting from improvements in expected future cash flows are recorded through net realized gains and losses. Net Investment Income Interest income from fixed maturities and mortgage loans is recognized when earned on the constant effective yield method based on the estimated timing of cash flows. Most premiums and discounts on fixed maturities are amortized to the maturity date. Premiums on callable bonds may be amortized to call dates based on call prices. For structured financial assets subject to prepayment risk, yields are recalculated and adjusted periodically to reflect historical and/or estimated future prepayments using the retrospective method. For certain other structured securities, including securities that previously had an ACL and interest only securities, any yield adjustments are made using the prospective method. Prepayment fees and make-whole payments on fixed maturities and mortgage loans are recorded in net investment income when earned. For equity securities, dividends are recognized as investment income on the ex-dividend date. Limited partnerships and other alternative investments primarily use the equity method of accounting to recognize the Company’s share of earnings. For fixed maturities with an ACL, net investment income is recognized at the original effective rate and accretion of the ACL is recognized through net realized gains and losses. The Company’s non-income producing investments were not material for the years ended December 31, 2024, 2023 and 2022. Accrued Investment Income Accrued investment income primarily includes accruals of interest and dividend income from investments that have been earned but not yet received.
Cash	Cash and Restricted Cash Cash represents cash on hand and demand deposits with banks or other financial institutions. Restrictions on cash primarily relate to funds that are held to support regulatory and contractual obligations.
Reinsurance	Reinsurance The Company cedes insurance to other insurers in order to limit its maximum losses, to diversify its exposures and provide statutory surplus relief. Such arrangements do not relieve the Company of its primary liability to policyholders. Failure of reinsurers to honor their obligations could result in losses to the Company. The Company also assumes reinsurance from other insurers and is a member of and participates in reinsurance pools and associations. Assumed reinsurance refers to the Company’s acceptance of certain insurance risks that other insurance companies or pools have underwritten. Reinsurance accounting is followed for ceded and assumed transactions that provide indemnification against loss or liability relating to insurance risk (i.e., risk transfer). To meet risk transfer requirements, a reinsurance agreement must include insurance risk, consisting of underwriting and timing risk, and a reasonable possibility of a significant loss to the reinsurer. If the ceded and assumed transactions do not meet risk transfer requirements, the Company accounts for these transactions as deposit transactions. The Company had no deposit liability as of December 31, 2024 or and 2023 reported in other liabilities. Premiums, benefits, losses and loss adjustment expenses reflect the net effects of ceded and assumed reinsurance transactions. Included in other assets are prepaid reinsurance premiums, which represent the portion of premiums ceded to reinsurers applicable to the unexpired terms of the reinsurance contracts. Reinsurance recoverables are balances due from reinsurers for ceded paid and unpaid losses and loss adjustment expenses and are presented net of an allowance for uncollectible reinsurance. Changes in the allowance for uncollectible reinsurance are reported in benefits, losses and loss adjustment expenses in the Company's Consolidated Statements of Operations. The Company periodically evaluates the recoverability of its reinsurance recoverable assets and establishes an allowance for uncollectible reinsurance. The allowance for uncollectible reinsurance reflects management’s best estimate of reinsurance cessions that may be uncollectible in the future due to reinsurers’ unwillingness or inability to pay. The allowance for uncollectible reinsurance comprises an ACL and an allowance for disputed balances. Based on this analysis, the Company may adjust the allowance for uncollectible reinsurance or charge off reinsurer balances that are determined to be uncollectible. The Company records credit losses related to reinsurance recoverables in benefits, losses and loss adjustment expenses. Write-offs of reinsurance recoverables and any related ACL are recorded in the period in which the balance is deemed uncollectible. Expected recoveries are included in the estimate of the ACL.
Deferred Policy Acquisition Costs	Deferred Policy Acquisition Costs DAC represents costs that are directly related to the acquisition of new and renewal insurance contracts and incremental direct costs of contract acquisition that are incurred in transactions with independent third parties or in compensation to employees. Such costs primarily include commissions, premium taxes, costs and certain other expenses that are directly related to successfully issued contracts, including a portion of policy issuance and underwriting costs. For P&C insurance products and group life, disability and accident contracts, costs are deferred and amortized ratably over the period the related premiums are earned. Deferred acquisition costs are reviewed to determine if they are recoverable from future income, and if not, are charged to expense. Anticipated investment income is considered in the determination of the recoverability of DAC.
Income Taxes	Income Taxes The Company recognizes taxes payable or refundable for the current year and deferred taxes for the tax consequences of temporary differences between the financial reporting and tax basis of assets and liabilities. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years the temporary differences are expected to reverse. A deferred tax provision is recorded for the tax effects of temporary differences between the Company's current taxable income and its income before tax under generally accepted accounting principles in the Consolidated Statements of Operations. For deferred tax assets, the Company records a valuation allowance that is adequate to reduce the total deferred tax asset to an amount that will more likely than not be realized.
Goodwill and Intangible Assets	Goodwill Goodwill represents the excess of the cost to acquire a business over the acquisition date fair value of net assets acquired. Goodwill is not amortized but is reviewed for impairment at least annually or more frequently if events occur or circumstances change that would indicate that a triggering event for a potential impairment has occurred. Goodwill is tested for impairment by comparing the fair value of a reporting unit to its carrying value. Goodwill is impaired up to the amount that the carrying value of the reporting unit exceeds the fair value. A reporting unit is defined as an operating segment or one level below an operating segment. The Company’s reporting units, for which goodwill has been allocated consist of Business Insurance, Personal Insurance, Employee Benefits, and Hartford Funds. Management’s determination of the fair value of each reporting unit incorporates multiple inputs into discounted cash flow calculations, including assumptions that market participants would make in valuing the reporting unit. Assumptions include levels of economic capital required to support the business, future business growth, earnings projections, the weighted average cost of capital used for purposes of discounting and, for the Hartford Funds segment, assets under management. Decreases in business growth, decreases in earnings projections and increases in the weighted average cost of capital will all cause a reporting unit’s fair value to decrease, increasing the possibility of impairments. Intangible Assets Acquired intangible assets on the Consolidated Balance Sheets include purchased customer relationship and agency or other distribution rights and licenses measured at fair value at acquisition. The Company amortizes finite-lived other intangible assets over their useful lives generally on a straight-line basis over the period of expected benefit, ranging from 1 to 15 years. Management revises amortization periods if it believes there has been a change in the length of time that an intangible asset will continue to have value. Indefinite-lived intangible assets are not subject to amortization. Intangible assets are assessed for impairment generally when events or circumstances indicate a potential impairment and at least annually for indefinite-lived intangibles. Finite-lived intangible assets are impaired if the carrying amount is not recoverable from undiscounted cash flows. Indefinite-lived intangible assets are impaired if the carrying amount exceeds fair value. Impaired intangible assets are written down to fair value.
Property and Equipment	Property and Equipment Property and equipment, which includes capitalized software and right-of-use lease assets, is carried at cost net of accumulated depreciation. Depreciation is based on the estimated useful lives of the various classes of property and equipment and is recognized principally on the straight-line method. Accumulated depreciation was $2.5 billion and $2.4 billion as of December 31, 2024 and 2023, respectively. Depreciation expense was $177, $204, and $213 for the years ended December 31, 2024, 2023 and 2022, respectively, and is reported in insurance operating costs and other expenses. The costs to access and develop hosted software arrangements, where The Hartford has the right to access and use the software, but not take possession, and the cost of certain software licenses are reported in other assets on a straight-line basis over the service period. Amortization of hosted software and certain software licenses was $108, $85, and $78 for the years ended December 31, 2024, 2023, and 2022, respectively, and is reported in insurance operating costs and other expenses. Leases Leases are classified as financing or operating leases. Where the lease is economically similar to a purchase because The Hartford obtains control of the underlying asset, the lease is classified as a financing lease and the Company recognizes amortization of the right of use asset and interest expense on the liability. Where the lease is not economically similar to a purchase as the lease provides The Hartford with only the right to control the use of the underlying asset over the lease term and the lease term is greater than one year, the lease is an operating lease and the lease cost is recognized as rental expense over the lease term on a straight-line basis. Leases with a term of one year or less are also expensed over the lease term but not recognized on the Consolidated Balance Sheets.
Unpaid Policy Claims and Claims Adjustment Expenses	Unpaid Losses and Loss Adjustment Expenses For property and casualty and group life, disability and accident insurance and assumed reinsurance products, the Company establishes reserves for unpaid losses and loss adjustment expenses to provide for the estimated costs of paying claims under insurance policies written by the Company. These reserves include estimates for both claims that have been reported and those that have not yet been reported, and include estimates of all losses and loss adjustment expenses associated with processing and settling these claims. Estimating the ultimate cost of future losses and loss adjustment expenses is an uncertain and complex process. This estimation process is based significantly on the assumption that past developments are an appropriate predictor of future events, and involves a variety of actuarial techniques that analyze experience, trends and other relevant factors. The effects of inflation are implicitly considered in the reserving process. In addition, a number of complex factors influence the uncertainties involved with the reserving process including social and economic trends and changes in the concepts of legal liability and damage awards. Accordingly, final claim settlements may vary from the present estimates, particularly when those payments may not occur until well into the future. The Company regularly reviews the adequacy of its estimated losses and loss adjustment expense reserves by reserve line within the various reportable segments. Adjustments to previously established reserves are reflected in the operating results of the period in which the adjustment is determined to be necessary. Such adjustments could possibly be significant, reflecting any variety of new and adverse or favorable trends. Most of the Company’s property and casualty insurance products reserves are not discounted. However, the Company has discounted to present value certain reserves for indemnity payments that are due to claimants under workers’ compensation policies because the payment pattern and the ultimate costs are reasonably fixed and determinable on an individual claim basis. The discount rate is based on the risk free rate for the expected claim duration as determined in the year the claims were incurred. The Company also has discounted liabilities for structured settlement agreements that provide fixed periodic payments to claimants. These structured settlements include annuities purchased to fund unpaid losses for permanently disabled claimants. These structured settlement liabilities are discounted to present value using the rate implicit in the purchased annuities and the purchased annuities are accounted for within reinsurance recoverables. Group life and disability contracts with long-tail claim liabilities are discounted because the payment pattern and the ultimate costs are reasonably fixed and determinable on an individual claim basis. The discount rates are estimated based on investment yields expected to be earned on the cash flows net of investment expenses and expected credit losses. The Company establishes discount rates for these reserves in the year the claims are incurred (the incurral year) which is when the estimated settlement pattern is determined. The discount rate for life and disability reserves acquired from Aetna's U.S. group life and disability business were based on interest rates in effect at the acquisition date of November 1, 2017. For further information about how unpaid losses and loss adjustment expenses are established, see Note 10 - Reserve for Unpaid Losses and Loss Adjustment Expenses.
Liability for Future Policy Benefit	Reserve for Future Policy Benefits The Company’s reserves for future policy benefits includes paid-up life insurance and whole-life policies resulting from conversion from group life policies included within the Employee Benefits segment and reserves for run-off structured settlement and terminal funding agreement liabilities, which are reported in the Corporate category. Contracts are grouped into cohorts by contract type and issue year. The Company establishes reserves for future policy benefits using the net premium approach, which represents the present value of future policyholder benefits and related expenses less the present value of future net premiums. Net premiums are calculated by multiplying gross premiums for the contracts in a specific cohort by a net premium ratio. The net premium ratio is determined for the lifetime of a given cohort as the present value of net benefits divided by the present value of gross premiums. Related expenses include termination and settlement costs and exclude acquisition costs and non-claim related costs, such as costs relating to investments, general administration, policy maintenance, product development, market research and general overhead or any other costs, which are expensed as incurred. The Company estimates premiums, benefits and related expense cash flows using methods that include assumptions, such as estimates of mortality, lapse, and claim-related expenses, and the possible impact of inflation on those expenses. Benefits include all guaranteed cash flows to be paid to the policyholder. The reserve for future policy benefits is adjusted for differences between actual and expected experience. Each quarter, the Company updates its estimates of cash flows expected over the life of a group of contracts using actual historical experience. These updated cash flows are used to calculate the revised net premiums and net premium ratio, which are used to derive an updated reserve for future policy benefits. In subsequent periods, the revised net premiums are used to measure the reserve for future policy benefits, subject to future revisions. Future cash flow assumptions, including mortality, lapse and expense are reviewed and, if a change is indicated, updated at least annually in the third quarter. The difference between the newly calculated reserve balance and the reserve balance before updating for actual experience and/or future cash flow assumptions is the remeasurement gain or loss, which is immaterial for each of the years ended December 31, 2024, 2023 and 2022, and is presented in benefits losses and loss adjustments expense in the Consolidated Statements of Operations. Changes to the reserve due to updates to cash flow assumptions, discounted at the discount rate used when each annual cohort was established, are recognized on a catch-up basis in the Consolidated Statement of Operations. The discount rate assumption is an equivalent single rate that is based on a current market observable, upper-medium grade fixed maturity yield. This has been interpreted to represent a yield based on single-A credit rated fixed maturity instruments with similar duration to the liability. The Company uses the yield of a market observable index of single-A credit rated fixed maturities as the basis for setting the discount rate. The discount rate assumption is updated quarterly and the change in the reserve estimate resulting from updating the discount rate assumption is recognized in other comprehensive income.
TreasuryStockPolicy	Treasury Stock Treasury stock is the cost of common stock repurchased, which includes the purchase price of shares acquired and direct costs to acquire shares, including commissions and excise taxes. Issuance and retirement of treasury stock is recognized at the average cost of shares held in treasury.
Foreign Currency	Foreign Currency Foreign currency translation gains and losses are reflected in stockholders’ equity as a component of AOCI. The Company’s foreign subsidiaries’ balance sheet accounts are translated at the exchange rates in effect at each year end and income statement accounts are translated at the average rates of exchange prevailing during the year. The national currencies of the international operations are generally their functional currencies; however, the U.S. dollar is the functional currency of Lloyd's Syndicate 1221 ("Lloyd's Syndicate"), for which the Company is the sole corporate member. Gains and losses resulting from the remeasurement of foreign currency transactions are reflected in earnings in net realized gains (losses) in the period in which they occur.
Derivatives, Methods of Accounting, Hedge Documentation	Strategies that Qualify for Hedge Accounting Some of the Company's derivatives satisfy hedge accounting requirements as outlined in Note 1 - Basis of Presentation and Significant Accounting Policies. Typically, these hedging instruments include interest rate swaps and, to a lesser extent, foreign currency swaps where the terms or expected cash flows of the hedged item closely match the terms of the swap. Cash Flow Hedges Interest rate swaps are predominantly used to manage portfolio duration and better match cash receipts from assets with cash disbursements required to fund liabilities. These derivatives primarily convert interest receipts on variable-rate fixed maturity securities to fixed rates. The Company has also entered into interest rate swaps to convert the variable interest payments on the $500 junior subordinated debentures due 2067 to fixed interest payments. For further information, see the Junior Subordinated Debentures section within Note 13 - Debt. Foreign currency swaps are used to convert foreign currency-denominated cash flows related to certain investment receipts to U.S. dollars in order to reduce cash flow fluctuations due to changes in currency rates. Non-qualifying Strategies

Fair Value Measures and Disclos

Fair Value Measures and Disclosures (Policies)	12 Months Ended
	Dec. 31, 2024
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments, Policy	Valuation Techniques The Company generally determines fair values using valuation techniques that use prices, rates, and other relevant information evident from market transactions involving identical or similar instruments. Valuation techniques also include, where appropriate, estimates of future cash flows that are converted into a single discounted amount using current market expectations. The Company uses a "waterfall" approach comprised of the following pricing sources and techniques, which are listed in priority order: • Quoted prices, unadjusted, for identical assets or liabilities in active markets, which are classified as Level 1. • Prices from third-party pricing services, which primarily utilize a combination of techniques. These services utilize recently reported trades of identical, similar, or benchmark securities making adjustments for market observable inputs available through the reporting date. If there are no recently reported trades, they may use a discounted cash flow technique to develop a price using expected cash flows based upon the anticipated future performance of the underlying collateral discounted at an estimated market rate. Both techniques develop prices that consider the time value of future cash flows and provide a margin for risk, including liquidity and credit risk. Most prices provided by third-party pricing services are classified as Level 2 because the inputs used in pricing the securities are observable. However, some securities that are less liquid or trade less actively are classified as Level 3. Additionally, certain long-dated securities include benchmark interest rate or credit spread assumptions that are not observable in the marketplace and are thus classified as Level 3. • Internal matrix pricing is a valuation process internally developed for private placement securities for which the Company is unable to obtain a price from a third-party pricing service. Internal pricing matrices determine credit spreads that, when combined with risk-free rates, are applied to contractual cash flows to develop a price. The Company develops credit spreads using market based data for public securities adjusted for credit spread differentials between public and private securities, which are obtained from a survey of multiple private placement brokers. The market-based reference credit spread considers the issuer’s sector, financial strength, and term to maturity, using an independent public security index, while the credit spread differential considers the non-public nature of the security. Securities priced using internal matrix pricing are classified as Level 2 because the significant inputs are observable or can be corroborated with observable data. • Independent broker quotes, which are typically non-binding, use inputs that can be difficult to corroborate with observable market based data. Brokers may use present value techniques using assumptions specific to the security types, or they may use recent transactions of similar securities. Due to the lack of transparency in the process that brokers use to develop prices, valuations that are based on independent broker quotes are classified as Level 3. The fair value of derivative instruments is determined primarily using a discounted cash flow model or option model technique and incorporates counterparty credit risk. In some cases, quoted market prices for exchange-traded and OTC cleared derivatives may be used and in other cases independent broker quotes may be used. The pricing valuation models primarily use inputs that are observable in the market or can be corroborated by observable market data. The valuation of certain derivatives may include significant inputs that are unobservable, such as volatility levels, and reflect the Company’s view of what other market participants would use when pricing such instruments. Valuation Controls The process for determining the fair value of investments is monitored by the Valuation Committee, which is a cross-functional group of senior management within the Company. The purpose of the Valuation Committee is to provide oversight of the pricing policy, procedures and controls, including approval of valuation methodologies and pricing sources. The Valuation Committee reviews market data trends, pricing statistics and trading statistics to ensure that prices are reasonable and consistent with our fair value framework. Controls and procedures used to assess third-party pricing services are reviewed by the Valuation Committee, including the results of annual due-diligence reviews. Controls include, but are not limited to, reviewing daily and monthly price changes, stale prices, and missing prices and comparing new trade prices to third-party pricing services, weekly price changes to published bond index prices, and daily OTC derivative market valuations to counterparty valuations. The Company has a dedicated pricing group that works with trading and investment professionals to challenge prices received by a third party pricing source if the Company believes that the valuation received does not accurately reflect the fair value. New valuation models and changes to current models require approval by the Valuation Committee. In addition, the Company’s enterprise-wide Operational Risk Management function provides an independent review of the suitability and reliability of model inputs, as well as an analysis of significant changes to current models. Valuation Inputs Quoted prices for identical assets in active markets are considered Level 1 and consist of on-the-run U.S. Treasuries, money market funds, exchange-traded equity securities, open-ended mutual funds, certain short-term investments, and exchange traded derivative instruments. Valuation Inputs Used in Levels 2 and 3 Measurements for Securities and Derivatives Level 2 Primary Observable Inputs Level 3 Primary Unobservable Inputs Fixed Maturity Investments Structured securities (includes ABS, CLOs, CMBS and RMBS) • Benchmark yields and spreads Other inputs for ABS, CLOs, and RMBS: • Independent broker quotes • Credit spreads beyond observable curve • Interest rates beyond observable curve Other inputs for less liquid securities or those that trade less actively, including subprime RMBS: • Estimated cash flows • Credit spreads, which include illiquidity premium • Constant prepayment rates • Constant default rates • Loss severity Corporates • Benchmark yields and spreads Other inputs for investment grade privately placed securities that utilize internal matrix pricing: • Independent broker quotes Other inputs for below investment grade privately placed securities and private bank loans: U.S. Treasuries, Municipals, and Foreign government/government agencies • Benchmark yields and spreads • Issuer credit default swap curves • Political events in emerging market economies • Municipal Securities Rulemaking Board reported trades and material event notices • Issuer financial statements • Credit spreads beyond observable curve • Interest rates beyond observable curve Equity Securities • Quoted prices in markets that are not active • For privately traded equity securities, internal discounted cash flow models utilizing earnings multiples or other cash flow assumptions that are not observable Short-term Investments • Benchmark yields and spreads • Reported trades, bids, offers • Issuer spreads and credit default swap curves • Material event notices and new issue money market rates • Independent broker quotes Derivatives Credit derivatives • Swap yield curve • Credit default swap curves • Not applicable Foreign exchange derivatives • Swap yield curve • Currency spot and forward rates • Cross currency basis curves • Not applicable Interest rate derivatives • Swap yield curve • Not applicable Equity derivatives • Equity index levels • Not applicable

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities (Policies)	12 Months Ended
	Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives, Methods of Accounting, Hedge Documentation	Strategies that Qualify for Hedge Accounting Some of the Company's derivatives satisfy hedge accounting requirements as outlined in Note 1 - Basis of Presentation and Significant Accounting Policies. Typically, these hedging instruments include interest rate swaps and, to a lesser extent, foreign currency swaps where the terms or expected cash flows of the hedged item closely match the terms of the swap. Cash Flow Hedges Interest rate swaps are predominantly used to manage portfolio duration and better match cash receipts from assets with cash disbursements required to fund liabilities. These derivatives primarily convert interest receipts on variable-rate fixed maturity securities to fixed rates. The Company has also entered into interest rate swaps to convert the variable interest payments on the $500 junior subordinated debentures due 2067 to fixed interest payments. For further information, see the Junior Subordinated Debentures section within Note 13 - Debt. Foreign currency swaps are used to convert foreign currency-denominated cash flows related to certain investment receipts to U.S. dollars in order to reduce cash flow fluctuations due to changes in currency rates. Non-qualifying Strategies

Commitment and Contingencies (P

Commitment and Contingencies (Policies)	12 Months Ended
	Dec. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies, Policy	Management evaluates each contingent matter separately. A loss is recorded if probable and reasonably estimable. Management establishes liabilities for these contingencies at its “best estimate,” or, if no one number within the range of possible losses is more probable than any other, the Company records an estimated liability at the low end of the range of losses.

Accounting Policies (Tables)

Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2024
Accounting Policies [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	Assets and (Liabilities) Carried at Fair Value by Hierarchy Level as of December 31, 2024 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets accounted for at fair value on a recurring basis Fixed maturities, AFS Asset-backed securities ("ABS") $ 3,937 $ — $ 3,915 $ 22 Collateralized loan obligations ("CLOs") 3,250 — 3,134 116 Commercial mortgage-backed securities ("CMBS") 2,736 — 2,569 167 Corporate 20,636 — 18,355 2,281 Foreign government/government agencies 480 — 480 — Municipal 5,304 — 5,304 — Residential mortgage-backed securities ("RMBS") 5,230 — 5,206 24 U.S. Treasuries 994 57 937 — Total fixed maturities, AFS 42,567 57 39,900 2,610 FVO securities 308 — 111 197 Equity securities, at fair value [1] 603 372 144 87 Derivative assets Credit derivatives 30 — 30 — Equity derivatives 4 — 4 — Foreign exchange derivatives 23 — 23 — Total derivative assets [2] 57 — 57 — Short-term investments 4,068 1,271 2,699 98 Total assets accounted for at fair value on a recurring basis $ 47,603 $ 1,700 $ 42,911 $ 2,992 Liabilities accounted for at fair value on a recurring basis Derivative liabilities Credit derivatives $ (30) $ — $ (30) $ — Foreign exchange derivatives 18 — 18 — Total derivative liabilities [3] (12) — (12) — Total liabilities accounted for at fair value on a recurring basis $ (12) $ — $ (12) $ — Assets and (Liabilities) Carried at Fair Value by Hierarchy Level as of December 31, 2023 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets accounted for at fair value on a recurring basis Fixed maturities, AFS ABS $ 3,320 $ — $ 3,320 $ — CLOs 3,090 — 2,977 113 CMBS 3,125 — 2,898 227 Corporate 17,866 — 16,005 1,861 Foreign government/government agencies 562 — 562 — Municipal 6,039 — 6,039 — RMBS 4,287 — 4,251 36 U.S. Treasuries 1,529 18 1,511 — Total fixed maturities, AFS 39,818 18 37,563 2,237 FVO securities 327 — 160 167 Equity securities, at fair value [1] 864 333 473 58 Derivative assets Credit derivatives (10) — (10) — Foreign exchange derivatives 9 — 9 — Total derivative assets [2] (1) — (1) — Short-term investments 3,850 1,400 2,425 25 Total assets accounted for at fair value on a recurring basis $ 44,858 $ 1,751 $ 40,620 $ 2,487 Liabilities accounted for at fair value on a recurring basis Derivative liabilities Credit derivatives $ 10 $ — $ 10 $ — Foreign exchange derivatives 4 — 4 — Interest rate derivatives (6) — (6) — Total derivative liabilities [3] 8 — 8 — Total liabilities accounted for at fair value on a recurring basis $ 8 $ — $ 8 $ — [1] Level 3 includes investments that have contractual sales restrictions that require consent to sell and are in place for the duration that the securities are held by the Company. [2] Includes derivative instruments in a net positive fair value position after consideration of the accrued interest and impact of collateral posting requirements which may be imposed by agreements and applicable law. See footnote 3 to this table for derivative liabilities. [3] Includes derivative instruments in a net negative fair value position (derivative liability) after consideration of the accrued interest and impact of collateral posting requirements which may be imposed by agreements and applicable law.

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	12 Months Ended
	Dec. 31, 2024
Earnings Per Share [Abstract]
Earnings (Loss) Per Common Share	Computation of Basic and Diluted Earnings per Common Share For the years ended December 31, (In millions, except for per share data) 2024 2023 2022 Earnings Net income $ 3,111 $ 2,504 $ 1,819 Less: Preferred stock dividends 21 21 21 Net income available to common stockholders $ 3,090 $ 2,483 $ 1,798 Shares Weighted average common shares outstanding, basic 293.9 307.1 324.8 Dilutive effect of stock-based awards under compensation plans 4.7 4.4 4.7 Weighted average common shares outstanding and dilutive potential common shares [1] 298.6 311.5 329.5 Net income available to common stockholders per common share Basic $ 10.51 $ 8.09 $ 5.54 Diluted $ 10.35 $ 7.97 $ 5.46 [1] For additional information, see Note 15 - Equity and Note 19 - Stock Compensation Plans.

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2024
Segment Reporting [Abstract]
Reconciliation of Revenue from Segments to Consolidated	Segment Revenues For the years ended December 31, 2024 2023 2022 Business Insurance Workers’ compensation $ 3,691 $ 3,670 $ 3,499 General liability 2,218 1,977 1,836 Marine 278 256 235 Package business 2,331 2,076 1,844 Commercial property 1,258 1,053 845 Professional Liability 824 787 737 Bond 327 321 303 Assumed reinsurance 758 615 467 Commercial automobile 1,079 927 844 Business Insurance earned premium and fee income 12,764 11,682 10,610 Net investment income 1,714 1,532 1,415 Net realized losses (73) (156) (385) Other revenue [1] 1 1 (1) Total Business Insurance 14,406 13,059 11,639 Personal Insurance Personal automobile 2,425 2,156 2,047 Homeowners 1,061 961 932 Personal Insurance earned premium and fee income [2] 3,486 3,117 2,979 Net investment income 222 171 140 Net realized losses (14) (16) (35) Other revenue 85 81 73 Total Personal Insurance 3,779 3,353 3,157 P&C Other Operations Net investment income 74 69 63 Net realized losses (4) (7) (16) Total P&C Other Operations 70 62 47 Employee Benefits Group disability 3,576 3,530 3,310 Group life 2,617 2,583 2,393 Other 422 402 354 Employee Benefits premium and other considerations 6,615 6,515 6,057 Net investment income 475 469 524 Net realized losses (24) (45) (122) Total Employee Benefits 7,066 6,939 6,459 Hartford Funds Mutual fund and ETF 960 900 964 Third-party life and annuity separate accounts [3] 75 73 80 Hartford Funds fee income 1,035 973 1,044 Net investment income 20 17 9 Net realized gains (losses) 12 10 (24) Total Hartford Funds 1,067 1,000 1,029 Total segment revenues $ 26,388 $ 24,413 $ 22,331 [1] Other revenues for Business Insurance includes revenues from equity method investments that are not considered revenues from contracts with customers in the table below. [2] For 2024, 2023 and 2022, AARP members accounted for earned premiums of $3.2 billion, $2.9 billion and $2.7 billion, respectively. [3]
Reconciliation of Other Significant Reconciling Item from Segments to Consolidated	Significant Segment Expenses For the years ended December 31, 2024 2023 2022 Business Insurance Current accident year losses and loss adjustment expenses ("LAE") before catastrophes $ 7,186 $ 6,575 $ 5,959 Current accident year catastrophe losses and LAE 486 436 441 Prior accident year development of losses and LAE (231) (225) (231) Amortization of DAC 1,993 1,779 1,563 Insurance operating costs 1,973 1,837 1,788 Amortization of other intangible assets 29 29 29 Dividends to policyholders 39 39 29 Total Business Insurance 11,475 10,470 9,578 Personal Insurance Current accident year losses and LAE before catastrophes 2,351 2,287 1,969 Current accident year catastrophe losses and LAE 282 240 208 Prior accident year development of losses and LAE (108) 11 (13) Amortization of DAC 255 231 228 Insurance operating costs 673 576 594 Amortization of other intangible assets 2 2 2 Total Personal Insurance 3,455 3,347 2,988 P&C Other Operations Prior accident year development of losses and LAE 219 224 280 Insurance operating costs 9 4 9 Total P&C Other Operations 228 228 289 Employee Benefits Group disability losses 2,432 2,370 2,263 Group life losses 2,060 2,157 2,091 Group losses - other 189 156 163 Amortization of DAC 34 34 33 Insurance operating costs and other expenses 1,609 1,514 1,467 Amortization of other intangible assets 40 40 40 Total Employee Benefits 6,364 6,271 6,057 Hartford Funds Sub-advisory expense 289 265 282 Employee compensation and benefits 131 121 123 Distribution and service 299 289 315 General, administrative and other 105 106 106 Total Hartford Funds 824 781 826 Total significant segment expenses $ 22,346 $ 21,097 $ 19,738
Reconciliation of Net Income from Segments to Consolidated	Segment/Category Summary For the Year Ended December 31, 2024 Reportable Segments Business Insurance Personal Insurance P&C Other Operations Employee Benefits Hartford Funds Total Reportable Segments Corporate Consolidated Earned premium and fee income from external customers $ 12,764 $ 3,486 $ — $ 6,615 $ 1,035 $ 23,900 $ 40 $ 23,940 Net investment income 1,714 222 74 475 20 2,505 63 2,568 Net realized gains/(losses) (73) (14) (4) (24) 12 (103) 42 (61) Other revenue [1] 1 85 — — — 86 2 88 Total Revenues 14,406 3,779 70 7,066 1,067 26,388 147 26,535 Significant segment expenses 11,475 3,455 228 6,364 824 22,346 22,346 Other segment expenses [2] 6 67 4 — — 77 77 Corporate expenses 263 263 Income tax expense/(benefit) 576 49 (35) 141 51 782 (44) 738 Net income (loss) $ 2,349 $ 208 $ (127) $ 561 $ 192 $ 3,183 $ (72) $ 3,111 Other segment disclosures: Amortization of DAC $ 1,993 $ 255 $ — $ 34 $ — $ 2,282 $ — $ 2,282 Amortization of other intangibles $ 29 $ 2 $ — $ 40 $ — $ 71 $ — $ 71 Total Assets $ 53,296 $ 6,034 $ 4,312 $ 13,502 $ 761 $ 77,905 $ 3,012 $ 80,917 Segment/Category Summary For the Year Ended December 31, 2023 Reportable Segments Business Insurance Personal Insurance P&C Other Operations Employee Benefits Hartford Funds Total Reportable Segments Corporate Consolidated Earned premium and fee income from external customers $ 11,682 $ 3,117 $ — $ 6,515 $ 973 $ 22,287 $ 39 $ 22,326 Net investment income 1,532 171 69 469 17 2,258 47 2,305 Net realized gains/(losses) (156) (16) (7) (45) 10 (214) 26 (188) Other revenue [1] 1 81 — — — 82 2 84 Total Revenues 13,059 3,353 62 6,939 1,000 24,413 114 24,527 Significant segment expenses 10,470 3,347 228 6,271 781 21,097 21,097 Other segment expenses [2] 2 60 — — — 62 62 Corporate expenses 280 280 Income tax expense/(benefit) 502 (15) (36) 133 45 629 (45) 584 Net income (loss) $ 2,085 $ (39) $ (130) $ 535 $ 174 $ 2,625 $ (121) $ 2,504 Other segment disclosures: Amortization of DAC $ 1,779 $ 231 $ — $ 34 $ — $ 2,044 $ — $ 2,044 Amortization of other intangibles $ 29 $ 2 $ — $ 40 $ — $ 71 $ — $ 71 Total Assets $ 49,711 $ 5,579 $ 4,235 $ 13,697 $ 684 $ 73,906 $ 2,874 $ 76,780 Segment/Category Summary For the Year Ended December 31, 2022 Reportable Segments Business Insurance Personal Insurance P&C Other Operations Employee Benefits Hartford Funds Total Reportable Segments Corporate Consolidated Earned premium and fee income from external customers $ 10,610 $ 2,979 $ — $ 6,057 $ 1,044 $ 20,690 $ 49 $ 20,739 Net investment income 1,415 140 63 524 9 2,151 26 2,177 Net realized losses (385) (35) (16) (122) (24) (582) (45) (627) Other revenue/(loss) [1] (1) 73 — — — 72 1 73 Total Revenues 11,639 3,157 47 6,459 1,029 22,331 31 22,362 Significant segment expenses 9,578 2,988 289 6,057 826 19,738 19,738 Other segment expenses [2] 11 56 — — — 67 67 Corporate expenses 295 295 Income tax expense/(benefit) 426 22 (52) 75 41 512 (69) 443 Net income (loss) $ 1,624 $ 91 $ (190) $ 327 $ 162 $ 2,014 $ (195) $ 1,819 Other segment disclosures: Amortization of DAC $ 1,563 $ 228 $ — $ 33 $ — $ 1,824 $ — $ 1,824 Amortization of other intangibles $ 29 $ 2 $ — $ 40 $ — $ 71 $ — $ 71 [1] Other revenues for Business Insurance and Corporate includes revenues from equity method investments that are not considered revenues from contracts with customers in the table below.
Disaggregation of Revenue [Table Text Block]	Non-Insurance Revenue from Contracts with Customers For the years ended December 31, Revenue Line Item 2024 2023 2022 Business Insurance Installment billing fees Fee income $ 43 $ 41 $ 39 Personal Insurance Installment billing fees Fee income 33 30 30 Insurance servicing revenues Other revenues 85 81 73 Employee Benefits Administrative services Fee income 222 217 187 Hartford Funds Advisory, servicing and distribution fees Fee income 1,035 973 1,044 Corporate Investment management and other fees Fee income 40 39 49 Other Other revenues — 1 1 Total non-insurance revenues with customers $ 1,458 $ 1,382 $ 1,423

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2024
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	Assets and (Liabilities) Carried at Fair Value by Hierarchy Level as of December 31, 2024 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets accounted for at fair value on a recurring basis Fixed maturities, AFS Asset-backed securities ("ABS") $ 3,937 $ — $ 3,915 $ 22 Collateralized loan obligations ("CLOs") 3,250 — 3,134 116 Commercial mortgage-backed securities ("CMBS") 2,736 — 2,569 167 Corporate 20,636 — 18,355 2,281 Foreign government/government agencies 480 — 480 — Municipal 5,304 — 5,304 — Residential mortgage-backed securities ("RMBS") 5,230 — 5,206 24 U.S. Treasuries 994 57 937 — Total fixed maturities, AFS 42,567 57 39,900 2,610 FVO securities 308 — 111 197 Equity securities, at fair value [1] 603 372 144 87 Derivative assets Credit derivatives 30 — 30 — Equity derivatives 4 — 4 — Foreign exchange derivatives 23 — 23 — Total derivative assets [2] 57 — 57 — Short-term investments 4,068 1,271 2,699 98 Total assets accounted for at fair value on a recurring basis $ 47,603 $ 1,700 $ 42,911 $ 2,992 Liabilities accounted for at fair value on a recurring basis Derivative liabilities Credit derivatives $ (30) $ — $ (30) $ — Foreign exchange derivatives 18 — 18 — Total derivative liabilities [3] (12) — (12) — Total liabilities accounted for at fair value on a recurring basis $ (12) $ — $ (12) $ — Assets and (Liabilities) Carried at Fair Value by Hierarchy Level as of December 31, 2023 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets accounted for at fair value on a recurring basis Fixed maturities, AFS ABS $ 3,320 $ — $ 3,320 $ — CLOs 3,090 — 2,977 113 CMBS 3,125 — 2,898 227 Corporate 17,866 — 16,005 1,861 Foreign government/government agencies 562 — 562 — Municipal 6,039 — 6,039 — RMBS 4,287 — 4,251 36 U.S. Treasuries 1,529 18 1,511 — Total fixed maturities, AFS 39,818 18 37,563 2,237 FVO securities 327 — 160 167 Equity securities, at fair value [1] 864 333 473 58 Derivative assets Credit derivatives (10) — (10) — Foreign exchange derivatives 9 — 9 — Total derivative assets [2] (1) — (1) — Short-term investments 3,850 1,400 2,425 25 Total assets accounted for at fair value on a recurring basis $ 44,858 $ 1,751 $ 40,620 $ 2,487 Liabilities accounted for at fair value on a recurring basis Derivative liabilities Credit derivatives $ 10 $ — $ 10 $ — Foreign exchange derivatives 4 — 4 — Interest rate derivatives (6) — (6) — Total derivative liabilities [3] 8 — 8 — Total liabilities accounted for at fair value on a recurring basis $ 8 $ — $ 8 $ — [1] Level 3 includes investments that have contractual sales restrictions that require consent to sell and are in place for the duration that the securities are held by the Company. [2] Includes derivative instruments in a net positive fair value position after consideration of the accrued interest and impact of collateral posting requirements which may be imposed by agreements and applicable law. See footnote 3 to this table for derivative liabilities. [3] Includes derivative instruments in a net negative fair value position (derivative liability) after consideration of the accrued interest and impact of collateral posting requirements which may be imposed by agreements and applicable law.
Fair Value Inputs, Assets, Quantitative Information	Significant Unobservable Inputs for Level 3 - Securities Assets accounted for at fair value on a recurring basis Fair Value Predominant Valuation Technique Significant Unobservable Input Minimum Maximum Weighted Average [1] Impact of Increase in Input on Fair Value [2] As of December 31, 2024 CMBS [3] $ 166 Discounted cash flows Spread (encompasses prepayment, default risk and loss severity) 200 bps 1,221 bps 418 bps Decrease Corporate [4] $ 2,166 Discounted cash flows Spread 81 bps 794 bps 286 bps Decrease RMBS [3] $ 19 Discounted cash flows Spread [6] 100 bps 372 bps 181 bps Decrease Constant prepayment rate [6] 1% 6% 4% Decrease [5] Constant default rate [6] 1% 4% 2% Decrease Loss severity [6] 30% 50% 41% Decrease Short-term investments $ 98 Discounted cash flows Spread 266 bps 266 bps 266 bps Decrease As of December 31, 2023 CLOs [3] $ 98 Discounted cash flows Spread 268 bps 270 bps 269 bps Decrease CMBS [3] $ 226 Discounted cash flows Spread (encompasses prepayment, default risk and loss severity) 365 bps 1,315 bps 509 bps Decrease Corporate [4] $ 1,741 Discounted cash flows Spread 49 bps 743 bps 323 bps Decrease RMBS $ 36 Discounted cash flows Spread [6] 32 bps 298 bps 161 bps Decrease Constant prepayment rate [6] 1% 5% 4% Decrease [5] Constant default rate [6] 1% 5% 2% Decrease Loss severity [6] 10% 70% 41% Decrease Short-term investments [3] $ 15 Discounted cash flows Spread 579 bps 1,254 bps 1,225 bps Decrease [1] The weighted average is determined based on the fair value of the securities. [2] Conversely, the impact of a decrease in input would have the opposite impact to the fair value as that presented in the table. [3] Excludes securities for which the Company bases fair value on broker quotations. [4] Excludes securities for which the Company bases fair value on broker quotations; however, included are broker priced lower-rated private placement securities for which the Company receives spread and yield information to corroborate the fair value. [5] Decrease for above market rate coupons and increase for below market rate coupons. [6] Generally, a change in the assumption used for the constant default rate would have been accompanied by a directionally similar change in the assumption used for the loss severity and a directionally opposite change in the assumption used for constant prepayment rate and would have resulted in wider spreads.
Fair Value, Assets (Liabilities) Measured on Recurring Basis, Unobservable Input Reconciliation	Fair Value Rollforwards for Financial Instruments Classified as Level 3 for the Total realized/unrealized gains (losses) Fair value as of January 1, 2024 Included in net income [1] Included in OCI [2] Purchases Settlements Sales Transfers into Level 3 [3] Transfers out of Level 3 [3] Fair value as of December 31, 2024 Assets Fixed maturities, AFS ABS $ — $ — $ — $ 70 $ — $ — $ — $ (48) $ 22 CLOs 113 — — 919 (64) — — (852) 116 CMBS 227 (6) 18 — (10) (67) 39 (34) 167 Corporate 1,861 — (23) 876 (316) (126) 9 — 2,281 RMBS 36 — — 90 (17) — — (85) 24 Total fixed maturities, AFS 2,237 (6) (5) 1,955 (407) (193) 48 (1,019) 2,610 FVO securities 167 (7) — 52 (15) — — — 197 Equity securities, at fair value 58 3 — 49 (20) (3) — — 87 Short-term investments 25 — — 145 (72) — — — 98 Total Assets $ 2,487 $ (10) $ (5) $ 2,201 $ (514) $ (196) $ 48 $ (1,019) $ 2,992 Fair Value Rollforwards for Financial Instruments Classified as Level 3 for the Total realized/unrealized gains (losses) Fair value as of January 1, 2023 Included in net income [1] Included in OCI [2] Purchases Settlements Sales Transfers into Level 3 [3] Transfers out of Level 3 [3] Fair value as of December 31, 2023 Assets Fixed maturities, AFS ABS $ 30 $ — $ — $ 82 $ — $ — $ — $ (112) $ — CLOs 115 — — 102 (49) — — (55) 113 CMBS 222 (2) 3 6 (18) (5) 21 — 227 Corporate 1,589 (5) 71 458 (196) (11) 50 (95) 1,861 RMBS 95 — — 40 (29) — — (70) 36 Total fixed maturities, AFS 2,051 (7) 74 688 (292) (16) 71 (332) 2,237 FVO securities 178 (1) — — (10) — — — 167 Equity securities, at fair value 61 (1) — 1 (3) — — — 58 Short-term investments 193 — — 48 (216) — — — 25 Total Assets $ 2,483 $ (9) $ 74 $ 737 $ (521) $ (16) $ 71 $ (332) $ 2,487 [1] Amounts in these columns are generally reported in net realized gains (losses) [2] All amounts are before income taxes. [3] Transfers into and/or (out of) Level 3 are primarily attributable to the availability of market observable information and the re-evaluation of the observability of pricing inputs. Changes in Unrealized Gains (Losses) for Financial Instruments Classified as Level 3 Still Held at Year End December 31, 2024 December 31, 2023 Changes in Unrealized Gain/(Loss) included in Net Income [1] [2] Changes in Unrealized Gain/(Loss) included in OCI [3] Changes in Unrealized Gain/(Loss) included in Net Income [1] [2] Changes in Unrealized Gain/(Loss) included in OCI [3] Assets Fixed maturities, AFS CLOs $ — $ — $ — $ 1 CMBS — 10 — 2 Corporate — (26) (6) 71 Total fixed maturities, AFS — (16) (6) 74 FVO securities (7) — (1) — Equity securities, at fair value — — (1) — Total Assets $ (7) $ (16) $ (8) $ 74 [1] All amounts in these rows are reported in net realized gains (losses [2] Amounts presented are for Level 3 only and therefore may not agree to other disclosures included herein. [3] Changes in unrealized gains (losses) on fixed maturities, AFS are reported in changes in net unrealized gain (loss) on fixed maturities in the Consolidated Statements of Comprehensive Income (Loss).
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments	Financial Assets and Liabilities Not Carried at Fair Value December 31, 2024 December 31, 2023 Fair Value Hierarchy Level Carrying Amount [1] Fair Value Fair Value Hierarchy Level Carrying Amount [1] Fair Value Assets Mortgage loans Level 3 $ 6,396 $ 5,901 Level 3 $ 6,087 $ 5,584 Liabilities Other policyholder funds and benefits payable Level 3 $ 614 $ 614 Level 3 $ 638 $ 639 Senior notes [2] Level 2 $ 3,867 $ 3,406 Level 2 $ 3,863 $ 3,533 Junior subordinated debentures [2] Level 2 $ 499 $ 460 Level 2 $ 499 $ 429 [1] As of December 31, 2024 and December 31, 2023, the carrying amount of mortgage loans is net of ACL of $44 and $51, respectively [2] Included in long-term debt in the Consolidated Balance Sheets, except for any current maturities, which are included in short-term debt when applicable.

Investments (Tables)

Investments (Tables)	12 Months Ended
	Dec. 31, 2024
Investments [Abstract]
Net Investment Income	Net Investment Income For the years ended December 31, (Before tax) 2024 2023 2022 Fixed maturities [1] $ 2,204 $ 1,895 $ 1,469 Equity securities 35 45 57 Mortgage loans 266 235 211 Limited partnerships and other alternative investments 148 212 515 Other investments [2] 14 9 5 Gross investment income $ 2,667 $ 2,396 $ 2,257 Investment expenses (99) (91) (80) Total net investment income $ 2,568 $ 2,305 $ 2,177 [1] Includes net investment income on short-term investments. [2] Primarily includes changes in fair value of certain equity fund investments and income from derivatives that qualify for hedge accounting and are used to hedge fixed maturities.
Net Realized Capital Gains (Losses)	Net Realized Gains (Losses) For the years ended December 31, (Before tax) 2024 2023 2022 Gross gains on sales of fixed maturities $ 31 $ 30 $ 57 Gross losses on sales of fixed maturities (198) (149) (315) Equity securities [1] Net realized gains (losses) on sales of equity securities (11) 100 (83) Change in net unrealized gains (losses) of equity securities 84 (22) (266) Net realized and unrealized gains (losses) on equity securities 73 78 (349) Net credit losses on fixed maturities, AFS (2) (14) (18) Change in ACL on mortgage loans 3 (15) (7) Intent-to-sell impairments — — (6) Other, net [2] 32 (118) 11 Net realized (losses) $ (61) $ (188) $ (627) [1] The change in net unrealized gains (losses) on equity securities still held as of the end of the period and included in net realized gains (losses) were $68, $17, and $(108) for the years ended December 31, 2024, 2023, and 2022, respectively. [2]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Table Text Block]	ACL on Fixed Maturities, AFS by Type For the years ended December 31, 2024 2023 2022 (Before tax) CMBS Corporate Total CMBS Corporate Total CMBS Corporate Foreign govt./govt. agencies Total Balance as of beginning of period $ 12 $ 9 $ 21 $ 10 $ 2 $ 12 $ — $ 1 $ — $ 1 Credit losses on fixed maturities where an allowance was not previously recorded 1 — 1 — 9 9 7 10 3 20 Reduction due to sales — (3) (3) — (5) (5) — (3) (1) (4) Reduction due to intent to sell — — — — — — — — (3) (3) Net increases (decreases) on fixed maturities where an allowance was previously recorded — 1 1 2 3 5 3 (3) 1 1 Write-offs charged against the allowance — (4) (4) — — — — (3) — (3) Balance as of end of period $ 13 $ 3 $ 16 $ 12 $ 9 $ 21 $ 10 $ 2 $ — $ 12
Schedule of Available-for-sale Securities	Fixed Maturities, AFS, by Type December 31, 2024 December 31, 2023 Amortized Cost ACL Gross Unrealized Gains Gross Unrealized Losses Fair Value Amortized Cost ACL Gross Unrealized Gains Gross Unrealized Losses Fair Value ABS $ 3,948 $ — $ 28 $ (39) $ 3,937 $ 3,347 $ — $ 18 $ (45) $ 3,320 CLOs 3,237 — 13 — 3,250 3,104 — 3 (17) 3,090 CMBS 2,976 (13) 21 (248) 2,736 3,466 (12) 19 (348) 3,125 Corporate 21,555 (3) 117 (1,033) 20,636 18,691 (9) 197 (1,013) 17,866 Foreign govt./govt. agencies 500 — 3 (23) 480 583 — 6 (27) 562 Municipal 5,574 — 77 (347) 5,304 6,207 — 131 (299) 6,039 RMBS 5,610 — 13 (393) 5,230 4,675 — 18 (406) 4,287 U.S. Treasuries 1,138 — — (144) 994 1,653 — 26 (150) 1,529 Total fixed maturities, AFS $ 44,538 $ (16) $ 272 $ (2,227) $ 42,567 $ 41,726 $ (21) $ 418 $ (2,305) $ 39,818
Investments by Contractual Maturity Year	Fixed Maturities, AFS, by Contractual Maturity Year December 31, 2024 December 31, 2023 Amortized Cost Fair Value Amortized Cost Fair Value One year or less $ 1,308 $ 1,298 $ 1,526 $ 1,501 Over one year through five years 9,564 9,414 9,670 9,433 Over five years through ten years 7,687 7,334 6,568 6,211 Over ten years 10,208 9,368 9,370 8,851 Subtotal 28,767 27,414 27,134 25,996 Mortgage-backed and asset-backed securities 15,771 15,153 14,592 13,822 Total fixed maturities, AFS $ 44,538 $ 42,567 $ 41,726 $ 39,818
Unrealized Loss on Investments	Unrealized Loss Aging for Fixed Maturities, AFS by Type and Length of Time as of December 31, 2024 Less Than 12 Months 12 Months or More Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses ABS $ 1,088 $ (14) $ 407 $ (25) $ 1,495 $ (39) CLOs 78 — — — 78 — CMBS 228 (4) 2,299 (244) 2,527 (248) Corporate 5,883 (138) 8,212 (895) 14,095 (1,033) Foreign govt./govt. agencies 165 (5) 178 (18) 343 (23) Municipal 1,263 (27) 2,712 (320) 3,975 (347) RMBS 1,297 (29) 2,672 (364) 3,969 (393) U.S. Treasuries 406 (26) 461 (118) 867 (144) Total fixed maturities, AFS in an unrealized loss position $ 10,408 $ (243) $ 16,941 $ (1,984) $ 27,349 $ (2,227) Unrealized Loss Aging for Fixed Maturities, AFS by Type and Length of Time as of December 31, 2023 Less Than 12 Months 12 Months or More Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses ABS $ 604 $ (6) $ 1,043 $ (39) $ 1,647 $ (45) CLOs 209 (1) 2,249 (16) 2,458 (17) CMBS 117 (7) 2,837 (341) 2,954 (348) Corporate 810 (10) 11,149 (1,003) 11,959 (1,013) Foreign govt./govt. agencies 27 — 368 (27) 395 (27) Municipal 329 (3) 3,196 (296) 3,525 (299) RMBS 181 (3) 3,207 (403) 3,388 (406) U.S. Treasuries 120 (11) 1,121 (139) 1,241 (150) Total fixed maturities, AFS in an unrealized loss position $ 2,397 $ (41) $ 25,170 $ (2,264) $ 27,567 $ (2,305)
Financing Receivable, Allowance for Credit Loss	ACL on Mortgage Loans For the years ended December 31, 2024 2023 2022 ACL as of beginning of period $ 51 $ 36 $ 29 Current period provision (release) (3) 15 7 Current period gross write-offs (4) — — ACL as of December 31, $ 44 $ 51 $ 36
Loans Credit Quality	Mortgage Loans LTV & DSCR by Origination Year as of December 31, 2024 2024 2023 2022 2021 2020 2019 & Prior Total Loan-to-value Amortized Cost Avg. DSCR Amortized Cost Avg. DSCR Amortized Cost Avg. DSCR Amortized Cost Avg. DSCR Amortized Cost Avg. DSCR Amortized Cost Avg. DSCR Amortized Cost [1] Avg. DSCR Greater than 80% $ 25 0.63x $ — —x $ 16 1.05x $ 37 1.03x $ — —x $ 110 1.68x $ 188 1.34x 65% - 80% 89 1.42x 7 1.35x 204 1.89x 421 2.55x 100 3.60x 439 2.01x 1,260 2.26x Less than 65% 357 1.62x 489 1.39x 696 2.85x 1,108 2.93x 518 2.67x 1,824 2.71x 4,992 2.57x Total mortgage loans $ 471 1.52x $ 496 1.39x $ 916 2.61x $ 1,566 2.79x $ 618 2.82x $ 2,373 2.53x $ 6,440 2.47x [1]Amortized cost of mortgage loans excludes ACL of $44. Mortgage Loans LTV & DSCR by Origination Year as of December 31, 2023 2023 2022 2021 2020 2019 2018 & Prior Total Loan-to-value Amortized Cost Avg. DSCR Amortized Cost Avg. DSCR Amortized Cost Avg. DSCR Amortized Cost Avg. DSCR Amortized Cost Avg. DSCR Amortized Cost Avg. DSCR Amortized Cost [1] Avg. DSCR Greater than 80% $ — —x $ 16 1.09x $ 38 1.05x $ — —x $ — —x $ 105 1.41x $ 159 1.29x 65% - 80% — —x 189 2.13x 457 2.42x 95 3.47x 98 1.77x 252 1.77x 1,091 2.25x Less than 65% 400 1.47x 724 2.75x 1,105 2.99x 527 2.92x 679 2.90x 1,453 2.67x 4,888 2.72x Total mortgage loans $ 400 1.47x $ 929 2.60x $ 1,600 2.78x $ 622 3.00x $ 777 2.76x $ 1,810 2.47x $ 6,138 2.60x [1]Amortized cost of mortgage loans excludes ACL of $51. Mortgage Loans by Region December 31, 2024 December 31, 2023 Amortized Cost Percent of Total Amortized Cost Percent of Total East North Central $ 362 5.6 % $ 368 6.0 % Middle Atlantic 259 4.0 % 238 3.9 % Mountain 764 11.9 % 699 11.4 % New England 356 5.5 % 351 5.7 % Pacific 1,400 21.8 % 1,326 21.6 % South Atlantic 1,821 28.3 % 1,776 28.9 % West North Central 97 1.5 % 103 1.7 % West South Central 588 9.1 % 445 7.2 % Other [1] 793 12.3 % 832 13.6 % Total mortgage loans 6,440 100.0 % 6,138 100.0 % ACL (44) (51) Total mortgage loans, net of ACL $ 6,396 $ 6,087 [1] Primarily represents loans collateralized by multiple properties in various regions. Mortgage Loans by Property Type December 31, 2024 December 31, 2023 Amortized Cost Percent of Total Amortized Cost Percent of Total Commercial Industrial $ 2,737 42.5 % $ 2,363 38.5 % Multifamily 2,161 33.5 % 2,200 35.9 % Office 507 7.9 % 578 9.4 % Retail [1] 957 14.9 % 917 14.9 % Single Family 78 1.2 % 80 1.3 % Total mortgage loans 6,440 100.0 % 6,138 100.0 % ACL (44) (51) Total mortgage loans, net of ACL $ 6,396 $ 6,087 [1]Primarily comprised of grocery-anchored retail centers, with no exposure to regional shopping malls.
Schedule of Financial Instruments Owned and Pledged as Collateral	December 31, 2024 December 31, 2023 Fair Value Fair Value Securities on deposit with government agencies $ 2,362 $ 2,339 Fixed maturities in trust for benefit of Lloyd's Syndicate policyholders 1,056 890 Short-term investments in trust for benefit of Lloyd's Syndicate policyholders 25 30 Fixed maturities in Lloyd's trust account — 154 Other investments 61 75 Total Other Restricted Investments $ 3,504 $ 3,488
Equity Method Investments	Aggregated summarized financial information of the Company’s equity method investees: As of December 31, 2024 2023 Balance sheet: Total assets $ 356,430 $ 308,259 Total liabilities $ 57,017 $ 44,950 The Company's carrying value $ 4,552 $ 4,328 For the years ended December 31, 2024 2023 2022 Operating results: Net investment income (loss) $ (1,002) $ (1,240) $ 1,604 Net income excluding net investment income $ 14,778 $ 13,000 $ 11,885 The Company's share of equity method income $ 103 $ 181 $ 533

Derivatives (Tables)

Derivatives (Tables)	12 Months Ended
	Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Balance Sheet Presentation	Derivative Balance Sheet Presentation Net Derivatives Asset Derivatives Liability Derivatives Notional Amount Fair Value Fair Value Fair Value Hedge Designation/ Derivative Type Dec 31, 2024 Dec 31, 2023 Dec 31, 2024 Dec 31, 2023 Dec 31, 2024 Dec 31, 2023 Dec 31, 2024 Dec 31, 2023 Cash flow hedges Interest rate swaps $ 4,225 $ 3,450 $ — $ (1) $ — $ 1 $ — $ (2) Foreign currency swaps 646 644 41 13 52 29 (11) (16) Total cash flow hedges 4,871 4,094 41 12 52 30 (11) (18) Non-qualifying strategies Interest rate contracts Interest rate swaps and futures 344 6,626 — (5) 1 — (1) (5) Foreign exchange contracts Foreign currency swaps and forwards 647 645 — — — — — — Credit contracts Credit derivatives in offsetting positions 986 998 — — 31 27 (31) (27) Equity contracts Equity index options 233 — 4 — 4 — — — Total non-qualifying strategies 2,210 8,269 4 (5) 36 27 (32) (32) Total cash flow hedges and non-qualifying strategies $ 7,081 $ 12,363 $ 45 $ 7 $ 88 $ 57 $ (43) $ (50) Balance Sheet Location Fixed maturities, AFS $ 647 $ 645 $ — $ — $ — $ — $ — $ — Other investments 3,011 1,662 57 (1) 66 18 (9) (19) Other liabilities 3,423 10,056 (12) 8 22 39 (34) (31) Total derivatives $ 7,081 $ 12,363 $ 45 $ 7 $ 88 $ 57 $ (43) $ (50) .
Offsetting Liabilities	Offsetting Derivative Assets and Liabilities (i) (ii) (iii) = (i) - (ii) (iv) (v) = (iii) - (iv) Net Amounts Presented in the Statement of Financial Position Collateral Disallowed for Offset in the Statement of Financial Position Gross Amounts of Recognized Assets (Liabilities) Gross Amounts Offset in the Statement of Financial Position Derivative Assets [1] (Liabilities) [2] Accrued Interest and Cash Collateral (Received) [3] Pledged [2] Financial Collateral (Received) Pledged [4] Net Amount As of December 31, 2024 Other investments $ 88 $ 86 $ 57 $ (55) $ — $ 2 Other liabilities $ (43) $ (42) $ (12) $ 11 $ (1) $ — As of December 31, 2023 Other investments $ 57 $ 55 $ (1) $ 3 $ — $ 2 Other liabilities $ (50) $ (36) $ 8 $ (22) $ (13) $ (1) [1] Included in other investments in the Company's Consolidated Balance Sheets. [2] Included in other liabilities in the Company's Consolidated Balance Sheets and is limited to the net derivative payable associated with each counterparty. [3] Included in other investments in the Company's Consolidated Balance Sheets and is limited to the net derivative receivable associated with each counterparty. [4] Excludes collateral associated with exchange-traded derivative instruments.
Derivatives in Cash Flow Hedging Relationships	Gain (Loss) Recognized in OCI Year Ended December 31, 2024 2023 2022 Interest rate swaps $ (14) $ 6 $ — Foreign currency swaps 41 (31) 56 Total $ 27 $ (25) $ 56 Gain (Loss) Reclassified from AOCI into Income Year Ended December 31, 2024 2023 2022 Net Investment Income Interest Expense Net Investment Income Interest Expense Net Investment Income Interest Expense Interest rate swaps $ (25) $ 16 $ (26) $ 15 $ 6 $ (2) Foreign currency swaps 12 — 10 — 9 — Total $ (13) $ 16 $ (16) $ 15 $ 15 $ (2) Total amounts presented on the Consolidated Statement of Operations $ 2,568 $ 199 $ 2,305 $ 199 $ 2,177 $ 213
Non-Qualifying Strategies Recognized within Net Realized Capital Gains (Losses)	Non-Qualifying Strategies Recognized within Net Realized Gains (Losses) For the Year Ended December 31, 2024 2023 2022 Foreign exchange contracts Foreign currency swaps and forwards $ — $ — $ 5 Interest rate contracts Interest rate swaps and futures 8 (3) 25 Credit contracts Credit derivatives that purchase credit protection — (105) 4 Equity contracts Equity index options 5 — (2) Commodity contracts Commodity options — — 14 Total [1] $ 13 $ (108) $ 46 [1] Excludes investments that contain an embedded credit derivative for which the Company has elected the fair value option. For further discussion, see the Fair Value Option section in Note 4 - Fair Value Measurements.
Credit Derivatives by Type	Credit Risk Assumed Derivatives by Type Underlying Referenced Credit Obligation(s) [1] Notional Amount [2] Fair Value Weighted Average Years to Maturity Type Average Credit Rating Offsetting Notional Amount [3] Offsetting Fair Value [3] As of December 31, 2024 Basket credit default swaps [4] Investment grade risk exposure $ 100 $ — 4 years CMBS Credit AAA $ 100 $ — Below investment grade risk exposure 392 30 3 years Corporate Credit B+ 392 (30) Below investment grade risk exposure 1 (1) Less than 1 year CMBS Credit CCC 1 1 Total [5] $ 493 $ 29 $ 493 $ (29) As of December 31, 2023 Basket credit default swaps [4] Investment grade risk exposure $ 101 $ (1) 5 years CMBS Credit AAA $ 101 $ 1 Below investment grade risk exposure 396 24 4 years Corporate Credit B+ 396 (24) Below investment grade risk exposure 2 (1) Less than 1 year CMBS Credit CCC- 2 1 Total [5] $ 499 $ 22 $ 499 $ (22) [1] The average credit ratings are based on availability and are generally the midpoint of the available ratings among Moody’s, S&P, and Fitch. If no rating is available from a rating agency, then an internally developed rating is used. [2] Notional amount is equal to the maximum potential future loss amount. These derivatives are governed by agreements and applicable law which include collateral posting requirements. There is no additional specific collateral related to these contracts or recourse provisions included in the contracts to offset losses. [3] The Company has entered into offsetting credit default swaps to terminate certain existing credit default swaps, thereby offsetting the future changes in value of, or losses paid related to, the original swap. [4] Comprised of swaps of standard market indices of diversified portfolios of corporate and CMBS issuers referenced through credit default swaps. These swaps are subsequently valued based upon the observable standard market index. [5]

Premiums Receivable (Tables)

Premiums Receivable (Tables)	12 Months Ended
	Dec. 31, 2024
Credit Loss [Abstract]
Premium Receivable, Allowance for Credit Loss [Table Text Block]	Premiums Receivable and Agents' Balances As of December 31, 2024 2023 Premiums receivable, excluding receivables for losses within a deductible and retrospectively-rated policy premiums ("loss sensitive business") $ 5,624 $ 5,303 Receivables for loss sensitive business, by credit quality: AA 97 94 A 57 54 BBB 193 136 BB 94 84 Below BB 50 45 Total receivables for loss sensitive business 491 413 Total Premiums Receivable and Agents' Balances, Gross 6,115 5,716 ACL (117) (109) Total Premiums Receivable and Agents' Balances, Net of ACL $ 5,998 $ 5,607 Rollforward of ACL on Premiums Receivable and Agents' Balances for the Year Ended December 31, 2024 December 31, 2023 December 31, 2022 Receivables Excluding Receivables for Loss Sensitive Business Receivables for Loss Sensitive Business Total Receivables Excluding Receivables for Loss Sensitive Business Receivables for Loss Sensitive Business Total Receivables Excluding Receivables for Loss Sensitive Business Receivables for Loss Sensitive Business Total Beginning ACL $ 89 $ 20 $ 109 $ 85 $ 24 $ 109 $ 83 $ 22 $ 105 Current period provision (release) 64 1 65 52 (2) 50 48 3 51 Current period gross write-offs (62) (1) (63) (55) (2) (57) (56) (1) (57) Current period gross recoveries 6 — 6 7 — 7 10 — 10 Ending ACL $ 97 $ 20 $ 117 $ 89 $ 20 $ 109 $ 85 $ 24 $ 109

Reinsurance (Tables)

Reinsurance (Tables)	12 Months Ended
	Dec. 31, 2024
Insurance [Abstract]
Reinsurance Recoverable, Credit Quality Indicator	Reinsurance Recoverables by Credit Quality Indicator As of December 31, 2024 As of December 31, 2023 P&C Employee Benefits Corporate Total P&C Employee Benefits Corporate Total AM Best Financial Strength Rating A++ $ 2,271 $ — $ — $ 2,271 $ 2,398 $ — $ — $ 2,398 A+ 2,169 281 224 2,674 2,030 251 241 2,522 A 829 1 — 830 810 1 — 811 A- 622 4 — 626 653 5 — 658 B++ 2 — 2 4 2 — 3 5 Below B++ 22 — — 22 22 — — 22 Total Rated by AM Best 5,915 286 226 6,427 5,915 257 244 6,416 Mandatory (Assigned) and Voluntary Risk Pools 205 — — 205 208 — — 208 Captives 402 — — 402 353 — — 353 Other not rated companies 176 5 — 181 226 4 — 230 Gross Reinsurance Recoverables 6,698 291 226 7,215 6,702 261 244 7,207 Allowance for uncollectible reinsurance (72) (1) (2) (75) (100) (1) (2) (103) Net Reinsurance Recoverables $ 6,626 $ 290 $ 224 $ 7,140 $ 6,602 $ 260 $ 242 $ 7,104
Reinsurance Recoverable, Allowance for Credit Loss	Allowance for Uncollectible Reinsurance As of December 31, 2024 As of December 31, 2023 As of December 31, 2022 P&C beginning allowance for uncollectible reinsurance $ 100 $ 102 $ 96 Beginning allowance for disputed amounts 57 60 54 P&C beginning ACL 43 42 42 Current period provision (6) 3 — Current period gross write-offs (13) (2) — P&C ending ACL 24 43 42 Ending allowance for disputed amounts 48 57 60 P&C ending allowance for uncollectible reinsurance 72 100 102 Employee Benefits allowance for uncollectible reinsurance 1 1 1 Corporate allowance for uncollectible reinsurance 2 2 2 Total allowance for uncollectible reinsurance $ 75 $ 103 $ 105
Property and Casualty Insurance and Group Benefits Revenue	Insurance Revenues Property and Casualty Insurance Revenue For the years ended December 31, Premiums Written 2024 2023 2022 Direct $ 17,622 $ 16,144 $ 14,891 Assumed 1,102 975 718 Ceded (1,775) (1,642) (1,490) Net $ 16,949 $ 15,477 $ 14,119 Premiums Earned Direct $ 16,915 $ 15,514 $ 14,328 Assumed 1,001 826 654 Ceded (1,742) (1,612) (1,462) Net $ 16,174 $ 14,728 $ 13,520 Employee Benefits Revenue For the years ended December 31, 2024 2023 2022 Gross earned premiums, fees and other considerations $ 6,576 $ 6,445 $ 5,988 Reinsurance assumed 166 174 175 Reinsurance ceded (127) (104) (106) Net earned premiums, fees and other considerations $ 6,615 $ 6,515 $ 6,057

Goodwill & Other Intangible A_2

Goodwill & Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill Carrying Value [Table Text Block]	The carrying value of goodwill allocated to reportable segments and the corporate category as of both December 31, 2024 and 2023 was as follows: Carrying Value Business Insurance $ 659 Personal Insurance 119 Hartford Funds 180 Employee Benefits 723 Corporate [1] 230 Total $ 1,911 [1] The Corporate category includes goodwill that was acquired at a holding company level and not pushed down to a subsidiary within a reportable segment. Carrying value of goodwill within Corporate as of December 31, 2024 and 2023 includes $138 and $92 for the Employee Benefits and Hartford Funds reporting units, respectively.
Schedule of Finite-Lived Intangible Assets [Table Text Block]	Other Intangible Assets As of December 31, 2024 As of December 31, 2023 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Amortized Intangible Assets: Customer relationships $ 636 $ (313) $ 323 $ 636 $ (269) $ 367 Marketing agreement with Aetna 16 (7) 9 16 (7) 9 Distribution Agreement 79 (75) 4 79 (72) 7 Distribution and Agency relationships & Other 340 (134) 206 340 (111) 229 Total Finite Life Intangibles 1,071 (529) 542 1,071 (459) 612 Total Indefinite Life Intangible Assets 95 95 95 95 Total Other Intangible Assets $ 1,166 $ (529) $ 637 $ 1,166 $ (459) $ 707
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	Expected Before Tax Amortization Expense for Acquired Intangibles as of December 31, 2024 Other Intangible Assets 2025 $ 71 2026 $ 70 2027 $ 68 2028 $ 64 2029 $ 62

Reserve for Unpaid Losses and_2

Reserve for Unpaid Losses and Loss Adjustment Expenses (Tables)	12 Months Ended
	Dec. 31, 2024
Liability for Unpaid Claims and Claims Adjustment Expense, Activity in Liability [Abstract]
Liabilities for Unpaid Losses and Loss Adjustment Expenses	Rollforward of Liabilities for Unpaid Losses and Loss Adjustment Expenses For the years ended December 31, 2024 2023 2022 Beginning liabilities for unpaid losses and loss adjustment expenses, gross $ 34,044 $ 33,083 $ 31,449 Reinsurance and other recoverables 6,696 6,465 6,081 Beginning liabilities for unpaid losses and loss adjustment expenses, net 27,348 26,618 25,368 Provision for unpaid losses and loss adjustment expenses Current accident year 10,305 9,538 8,577 Prior accident year development [1] (120) 10 36 Total provision for unpaid losses and loss adjustment expenses 10,185 9,548 8,613 Change in deferred gain on retroactive reinsurance included in other liabilities [1] 83 (194) (229) Payments Current accident year (2,765) (2,716) (2,424) Prior accident years (5,175) (5,926) (4,678) Total payments (7,940) (8,642) (7,102) Foreign currency adjustment (25) 18 (32) Ending liabilities for unpaid losses and loss adjustment expenses, net 29,651 27,348 26,618 Reinsurance and other recoverables 6,753 6,696 6,465 Ending liabilities for unpaid losses and loss adjustment expenses, gross $ 36,404 $ 34,044 $ 33,083 [1] Prior accident year development for the year ended December 31, 2024 includes a $145 benefit for amortization of a deferred gain under retroactive reinsurance accounting related to the Navigator's ADC as the Company began collecting recoveries of the ceded losses from National Indemnity Company ("NICO"), a subsidiary of Berkshire Hathaway Inc, during the period. Prior accident year development does not include the benefit of a portion of losses ceded under the A&E ADC, which, under retroactive reinsurance accounting, is deferred and is recognized over the period the ceded losses are recovered in cash from NICO. For additional information regarding the two adverse development cover reinsurance agreements, refer to Adverse Development Covers discussion below. (Favorable) Unfavorable Prior Accident Year Development For the years ended December 31, 2024 2023 2022 Workers’ compensation $ (258) $ (236) $ (204) Workers’ compensation discount accretion 44 42 36 General liability 211 41 56 Marine (1) (2) 2 Package business (6) (24) (39) Commercial property (7) (7) (11) Professional liability (27) (2) (11) Bond (56) (27) (32) Assumed reinsurance 24 34 19 Commercial automobile liability 47 20 38 Personal automobile liability (30) — (14) Homeowners (28) (6) (1) Net asbestos and environmental reserves 141 — — Catastrophes (87) (87) (62) Uncollectible reinsurance (19) 13 3 Other reserve re-estimates, net 15 57 27 Prior accident year development, including full benefit for the ADC cession (37) (184) (193) Change in deferred gain on retroactive reinsurance included in other liabilities [1] (83) 194 229 Total prior accident year development $ (120) $ 10 $ 36 [1] The change in deferred gain on retroactive reinsurance for the year ended December 31, 2024, included a benefit for amortization of the Navigators ADC deferred gain of $145. The change in deferred gain for the years ended December 31, 2024, 2023 and 2022 also included $62, $194 and $229, respectively of adverse development on A&E reserves in excess of ceded premium paid. Rollforward of Liabilities for Unpaid Losses and Loss Adjustment Expenses For the years ended December 31, 2024 2023 2022 Beginning liabilities for unpaid losses and loss adjustment expenses, gross $ 8,274 $ 8,160 $ 8,210 Reinsurance recoverables 254 245 245 Beginning liabilities for unpaid losses and loss adjustment expenses, net 8,020 7,915 7,965 Provision for unpaid losses and loss adjustment expenses Current incurral year 5,195 5,145 4,853 Prior year's discount accretion 194 193 202 Prior incurral year development [1] (561) (502) (381) Total provision for unpaid losses and loss adjustment expenses [2] 4,828 4,836 4,674 Payments Current incurral year (2,735) (2,575) (2,456) Prior incurral years (2,189) (2,156) (2,268) Total payments (4,924) (4,731) (4,724) Ending liabilities for unpaid losses and loss adjustment expenses, net 7,924 8,020 7,915 Reinsurance recoverables 282 254 245 Ending liabilities for unpaid losses and loss adjustment expenses, gross $ 8,206 $ 8,274 $ 8,160 [1] Prior incurral year development represents the change in estimated ultimate incurred losses and loss adjustment expenses for prior incurral years on a discounted basis. [2] Includes unallocated loss adjustment expenses of $175, $182 and $185 for the years ended December 31, 2024, 2023 and 2022, respectively, that are recorded in insurance operating costs and other expenses in the Consolidated Statements of Operations.
Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance	Property and Casualty Insurance Products Reserves, Net of Reinsurance, that are Discounted For the years ended December 31, 2024 2023 2022 Liability for unpaid losses and loss adjustment expenses, at undiscounted amounts $ 1,184 $ 1,255 $ 1,343 Amount of discount 333 339 347 Carrying value of liability for unpaid losses and loss adjustment expenses $ 851 $ 916 $ 996 Discount accretion included in losses and loss adjustment expenses $ 44 $ 42 $ 36 Weighted average discount rate 2.80 % 2.74 % 2.71 % Range of discount rates 0.83 % - 14.03 % 0.83 % - 14.03 % 0.83 % - 14.03 % Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance [1] (Unaudited) Reserve Line 1st Year 2nd Year 3rd Year 4th Year 5th Year 6th Year 7th Year 8th Year 9th Year 10th Year Workers' compensation 14.8 % 18.4 % 12.1 % 8.1 % 5.7 % 4.0 % 2.9 % 2.1 % 1.7 % 1.3 % General liability 2.5 % 7.8 % 11.8 % 16.6 % 15.5 % 12.3 % 9.1 % 5.9 % 3.7 % 0.6 % Marine 22.8 % 32.0 % 16.8 % 7.5 % 6.7 % 6.2 % 0.8 % 0.4 % (1.5 %) (0.7 %) Package business 35.8 % 22.4 % 9.6 % 9.3 % 6.4 % 4.3 % 3.3 % 2.1 % 1.4 % 1.2 % Commercial property 49.9 % 31.9 % 7.5 % 3.3 % 1.5 % 0.8 % — % 0.2 % (0.2 %) (0.5 %) Commercial automobile liability 14.1 % 19.4 % 20.1 % 17.0 % 12.2 % 6.8 % 4.2 % 1.2 % 0.7 % — % Commercial automobile physical damage 78.2 % 17.3 % (0.2 %) Professional liability 5.3 % 16.1 % 16.5 % 11.8 % 9.6 % 10.3 % 8.9 % 3.4 % 2.4 % (1.9 %) Bond 11.1 % 26.4 % 11.0 % 8.6 % 1.2 % (1.1 %) (1.6 %) (7.8 %) (0.3 %) (0.3 %) Assumed Reinsurance 26.1 % 33.0 % 14.2 % 6.8 % 5.9 % 2.4 % (1.0 %) 0.8 % 0.1 % (0.4 %) Personal automobile liability 32.7 % 34.4 % 16.3 % 8.0 % 3.6 % 1.4 % 0.6 % 0.2 % 0.2 % 0.1 % Personal automobile physical damage 91.9 % 6.3 % (0.4 %) Homeowners 67.7 % 26.2 % 2.0 % 0.6 % 0.8 % 0.2 % 0.1 % 0.1 % 0.1 % — % [1]Negative percentages are generally due to salvage, subrogation or other recoveries. Group Life, Disability and Accident Products Reserves, Net of Reinsurance, that are Discounted For the years ended December 31, 2024 2023 2022 Liability for unpaid losses and loss adjustment expenses, at undiscounted amounts $ 8,111 $ 8,150 $ 8,124 Amount of discount (1,196) (1,166) (1,205) Carrying value of liability for unpaid losses and loss adjustment expenses $ 6,915 $ 6,984 $ 6,919 Weighted average discount rate 3.3 % 3.2 % 3.2 % Range of discount rate 2.1 % - 8.0 % 2.1 % - 8.0 % 2.1 % - 8.0 % Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Unaudited) 1st Year 2nd Year 3rd Year 4th Year 5th Year 6th Year 7th Year 8th Year 9th Year 10th Year Group long-term disability 7.6 % 27.0 % 15.9 % 8.0 % 6.3 % 5.2 % 4.5 % 3.8 % 3.3 % 2.8 % Group life and accident, excluding premium waiver 75.8 % 22.6 % 1.1 %
Reconciliation of Loss Development to Liability for Unpaid Losses and Loss Adjustment Expenses	Reconciliation of Loss Development to Liability for Unpaid Losses and Loss Adjustment Expenses As of December 31, 2024 Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance Subtotal Reserve Line Cumulative Incurred for Accident Years Displayed in Triangles Cumulative Paid for Accident Years Displayed in Triangles Unpaid for Accident Years not Displayed in Triangles Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance Discount Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance Reinsurance and Other Recoverables Liability for Unpaid Losses and Loss Adjustment Expenses Workers' compensation $ 18,389 $ (9,665) $ 3,836 $ 419 $ (319) $ 12,660 $ 1,721 $ 14,381 General liability 9,416 (4,177) 494 202 — 5,935 1,230 7,165 Marine 1,427 (1,114) 15 15 — 343 244 587 Package business 8,630 (6,279) 109 130 — 2,590 31 2,621 Commercial property 4,244 (3,676) 13 31 — 612 299 911 Commercial automobile liability 4,606 (3,106) 16 38 — 1,554 113 1,667 Commercial automobile physical damage 239 (213) 4 1 — 31 — 31 Professional liability 3,042 (1,567) 55 47 — 1,577 611 2,188 Bond 667 (276) 19 33 — 443 14 457 Assumed Reinsurance 2,107 (1,356) — 7 — 758 30 788 Personal automobile liability 10,862 (9,240) 31 74 — 1,727 18 1,745 Personal automobile physical damage 1,640 (1,574) 7 5 — 78 — 78 Homeowners 5,876 (5,521) 6 42 — 403 5 408 Other ongoing business 168 7 (14) 161 356 517 Asbestos and environmental [1] 315 — — 315 2,038 2,353 Other operations [1] 293 171 — 464 43 507 Total P&C $ 71,145 $ (47,764) $ 5,381 $ 1,222 $ (333) $ 29,651 $ 6,753 $ 36,404 [1] Asbestos and environmental and other operations include asbestos, environmental and other latent exposures not foreseen when coverages were written, including, but not limited to, potential liability for pharmaceutical products, silica, talcum powder, head injuries, lead paint, construction defects, sexual molestation and sexual abuse and other long-tail liabilities. These reserve lines do not have significant paid or incurred loss development for the most recent ten accident years and therefore do not have loss development displayed in triangles. Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance Subtotal Reserve Line Cumulative Incurred for Incurral Years Displayed in Triangles Cumulative Paid for Incurral Years Displayed in Triangles Unpaid for Incurral Years not Displayed in Triangles Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance Discount Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance Reinsurance and Other Recoverables Liability for Unpaid Losses and Loss Adjustment Expenses Group long-term disability $ 14,365 $ (8,243) $ 1,400 $ 193 $ (1,121) $ 6,594 $ 270 $ 6,864 Group life and accident, excluding premium waiver 6,213 (5,669) 145 5 (12) 682 4 686 Group short-term disability 173 10 — 183 — 183 Group life premium waiver 485 9 (63) 431 3 434 Group supplemental health 34 — — 34 5 39 Total Employee Benefits $ 20,578 $ (13,912) $ 2,237 $ 217 $ (1,196) $ 7,924 $ 282 $ 8,206
Losses and Allocated Loss Adjustments Expense, Net of Reinsurance	Workers' Compensation Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 IBNR Claims 2015 $ 1,873 $ 1,835 $ 1,801 $ 1,724 $ 1,714 $ 1,699 $ 1,667 $ 1,645 $ 1,625 $ 1,625 $ 329 114,700 2016 1,772 1,772 1,780 1,767 1,748 1,708 1,670 1,634 1,621 331 112,747 2017 1,862 1,869 1,840 1,822 1,757 1,665 1,635 1,597 392 112,274 2018 1,916 1,917 1,915 1,904 1,870 1,836 1,798 464 120,076 2019 1,937 1,935 1,934 1,934 1,899 1,864 528 121,158 2020 1,865 1,864 1,849 1,808 1,712 601 92,347 2021 1,831 1,832 1,831 1,831 675 103,229 2022 2,000 2,001 2,001 819 114,189 2023 2,166 2,166 1,171 117,297 2024 2,174 1,536 109,521 Total $ 18,389 Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2015 $ 261 $ 576 $ 778 $ 909 $ 1,004 $ 1,068 $ 1,117 $ 1,151 $ 1,179 $ 1,200 2016 255 579 779 908 1,003 1,064 1,110 1,145 1,173 2017 261 575 778 900 977 1,035 1,087 1,118 2018 283 624 837 983 1,090 1,170 1,215 2019 291 637 856 1,007 1,129 1,204 2020 223 507 695 850 939 2021 254 562 780 920 2022 293 649 910 2023 286 677 2024 309 Total $ 9,665 General Liability Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 IBNR Claims 2015 $ 556 $ 560 $ 554 $ 594 $ 633 $ 647 $ 637 $ 647 $ 641 $ 656 $ 60 16,903 2016 613 583 607 632 632 620 636 670 692 68 17,989 2017 626 614 613 615 613 615 657 690 82 17,581 2018 692 669 697 703 728 751 816 167 19,019 2019 822 826 821 839 859 876 190 18,871 2020 938 922 922 873 857 363 14,574 2021 1,002 991 983 1,000 493 12,839 2022 1,116 1,110 1,167 746 12,673 2023 1,219 1,230 989 10,854 2024 1,432 1,366 7,290 Total $ 9,416 Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2015 $ 10 $ 55 $ 156 $ 278 $ 409 $ 477 $ 524 $ 547 $ 564 $ 569 2016 12 52 131 283 368 446 513 564 596 2017 15 67 156 255 344 441 506 553 2018 21 83 177 288 409 512 595 2019 29 100 192 339 501 613 2020 45 110 202 308 432 2021 34 115 209 394 2022 26 134 281 2023 17 128 2024 16 Total $ 4,177 Marine Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 IBNR Claims 2015 $ 158 $ 146 $ 146 $ 148 $ 133 $ 138 $ 139 $ 142 $ 140 $ 139 $ 1 10,559 2016 139 142 137 147 149 146 148 158 157 — 13,811 2017 153 173 160 159 165 167 174 172 — 16,235 2018 131 146 141 146 152 156 155 (5) 10,812 2019 139 135 134 129 127 127 (3) 7,261 2020 145 137 134 137 142 7 5,261 2021 127 127 119 127 15 5,357 2022 140 132 130 22 5,306 2023 134 129 39 4,674 2024 149 83 3,735 Total $ 1,427 [1] Contributing to the negative IBNR reserves for some accident years is a lag in the timing of expected reinsurance recoveries under the Navigators ADC with NICO. Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2015 $ 40 $ 85 $ 116 $ 125 $ 133 $ 139 $ 140 $ 142 $ 142 $ 141 2016 35 80 105 122 131 140 143 146 141 2017 47 106 133 143 150 161 170 167 2018 33 94 126 135 142 159 151 2019 34 80 96 105 115 120 2020 31 68 90 99 114 2021 25 63 87 101 2022 27 72 89 2023 22 58 2024 32 Total $ 1,114 Package Business Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 IBNR Claims 2015 $ 582 $ 588 $ 585 $ 583 $ 588 $ 581 $ 567 $ 564 $ 564 $ 570 $ 17 42,479 2016 655 638 632 625 611 595 591 590 582 24 44,381 2017 695 702 692 657 644 637 640 638 33 46,958 2018 719 724 688 667 655 654 671 46 45,361 2019 813 769 749 744 747 761 72 43,955 2020 915 893 877 837 828 101 62,964 2021 946 954 958 958 150 47,755 2022 1,038 1,039 1,043 215 47,134 2023 1,250 1,223 378 46,364 2024 1,356 750 42,172 Total $ 8,630 Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2015 $ 212 $ 332 $ 383 $ 445 $ 486 $ 505 $ 513 $ 530 $ 542 $ 549 2016 225 353 410 465 500 521 540 545 549 2017 235 372 447 496 534 561 578 593 2018 237 402 451 498 537 571 609 2019 254 413 488 571 626 666 2020 326 493 573 648 699 2021 368 556 650 746 2022 319 633 728 2023 453 725 2024 415 Total $ 6,279 Commercial Property Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 IBNR Claims 2015 $ 298 $ 301 $ 302 $ 301 $ 305 $ 304 $ 301 $ 301 $ 301 $ 299 $ — 20,977 2016 405 419 399 406 408 408 405 405 405 — 23,927 2017 577 516 456 438 440 438 439 438 2 24,627 2018 450 436 423 403 400 393 393 2 21,821 2019 480 439 418 420 421 420 (1) 20,981 2020 501 469 440 438 437 49 20,529 2021 531 500 463 434 15 18,283 2022 497 481 475 48 17,446 2023 448 424 86 17,003 2024 519 164 15,209 Total $ 4,244 Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2015 $ 179 $ 257 $ 284 $ 296 $ 301 $ 303 $ 302 $ 302 $ 301 $ 300 2016 215 342 378 395 401 406 406 407 406 2017 229 378 411 427 432 438 440 441 2018 188 344 378 385 394 394 394 2019 215 351 383 405 407 410 2020 221 336 355 367 373 2021 241 383 403 412 2022 180 369 412 2023 199 300 2024 228 Total $ 3,676 Commercial Automobile Liability Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 IBNR Claims 2015 $ 308 $ 358 $ 372 $ 356 $ 356 $ 359 $ 360 $ 358 $ 360 $ 358 $ 5 28,750 2016 385 393 390 391 391 395 395 396 395 5 29,266 2017 372 383 379 383 381 394 398 398 2 26,420 2018 349 396 405 406 424 433 435 18 24,816 2019 425 439 450 460 471 479 20 28,627 2020 428 424 419 397 388 44 22,272 2021 440 443 429 410 86 20,222 2022 468 500 547 158 20,891 2023 527 555 279 20,649 2024 641 501 19,954 Total $ 4,606 Cumulative Paid Losses & Allocated Loss Adjustment Expense, Net of Reinsurance For the years ended December 31 (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2015 $ 62 $ 142 $ 207 $ 267 $ 314 $ 335 $ 344 $ 348 $ 350 $ 351 2016 65 147 232 303 339 357 379 385 388 2017 60 134 211 285 328 368 386 389 2018 62 153 238 305 360 387 406 2019 67 160 247 327 393 428 2020 55 119 200 264 317 2021 55 127 212 282 2022 64 171 294 2023 69 174 2024 77 Total $ 3,106 Commercial Automobile Physical Damage Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2022 2023 2024 IBNR Claims 2022 $ 70 $ 74 $ 74 $ 2 16,771 2023 80 81 6 16,832 2024 84 8 15,533 Total $ 239 Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2022 2023 2024 2022 $ 59 $ 73 $ 72 2023 61 74 2024 67 Total $ 213 Professional Liability Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Claims Made Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 IBNR Claims 2015 $ 164 $ 174 $ 179 $ 190 $ 213 $ 206 $ 198 $ 196 $ 197 $ 192 $ 1 7,279 2016 183 176 203 196 194 195 193 191 202 20 8,462 2017 205 203 231 225 239 242 217 227 14 9,555 2018 243 274 270 271 265 324 312 18 9,910 2019 295 313 330 347 354 385 81 9,972 2020 369 363 336 324 298 106 8,034 2021 339 343 327 306 149 6,761 2022 349 355 338 214 7,177 2023 384 388 260 8,049 2024 394 337 7,546 Total $ 3,042 Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Claims Made Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2015 $ 9 $ 40 $ 85 $ 107 $ 124 $ 140 $ 163 $ 175 $ 185 $ 181 2016 8 51 88 111 124 147 166 176 175 2017 11 48 87 121 149 179 190 189 2018 15 71 127 161 194 232 260 2019 21 77 147 197 241 265 2020 19 71 117 147 171 2021 15 55 95 127 2022 18 64 95 2023 20 76 2024 28 Total $ 1,567 Bond Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 IBNR Claims 2015 $ 67 $ 67 $ 63 $ 60 $ 54 $ 48 $ 47 $ 42 $ 37 $ 29 $ 4 1,413 2016 61 61 61 55 51 45 37 34 28 8 1,348 2017 63 90 101 94 79 70 68 65 22 1,799 2018 68 68 72 71 70 63 54 24 1,750 2019 72 73 74 73 70 61 44 1,925 2020 83 84 79 83 80 51 2,294 2021 85 85 88 84 55 2,989 2022 85 93 93 29 2,571 2023 81 83 63 1,647 2024 90 78 975 Total $ 667 Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2015 $ 9 $ 20 $ 24 $ 31 $ 34 $ 32 $ 30 $ 25 $ 25 $ 25 2016 2 12 15 20 22 22 22 20 20 2017 5 46 55 54 42 43 43 43 2018 6 16 23 24 29 30 29 2019 3 13 15 16 16 17 2020 4 12 21 26 27 2021 8 21 23 29 2022 11 42 59 2023 8 17 2024 10 Total $ 276 Assumed Reinsurance Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 IBNR Claims 2015 $ 102 $ 92 $ 94 $ 94 $ 95 $ 96 $ 96 $ 96 $ 96 $ 96 $ — 1,737 2016 88 91 98 100 102 101 102 104 104 (1) 1,996 2017 129 153 161 157 153 155 155 155 — 2,596 2018 128 127 129 134 135 132 132 (6) 3,078 2019 181 189 186 190 208 208 11 3,843 2020 183 180 186 178 181 11 3,374 2021 191 195 203 204 22 2,698 2022 266 274 290 84 2,501 2023 329 327 112 2,354 2024 410 297 1,049 Total $ 2,107 [1] Contributing to the negative IBNR reserves for some accident years is a lag in the timing of expected reinsurance recoveries under the Navigators ADC with NICO. Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2015 $ 42 $ 64 $ 77 $ 83 $ 91 $ 94 $ 95 $ 95 $ 96 $ 96 2016 36 66 84 90 95 97 99 101 101 2017 44 116 135 145 147 149 151 150 2018 25 111 133 139 141 144 133 2019 62 132 153 159 176 185 2020 49 89 113 132 151 2021 46 102 132 157 2022 60 128 173 2023 63 149 2024 61 Total $ 1,356 Personal Automobile Liability Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 IBNR Claims 2015 $ 1,195 $ 1,340 $ 1,338 $ 1,330 $ 1,331 $ 1,328 $ 1,324 $ 1,320 $ 1,319 $ 1,319 $ 2 216,911 2016 1,407 1,402 1,393 1,397 1,395 1,386 1,384 1,384 1,388 6 215,877 2017 1,277 1,275 1,228 1,214 1,200 1,198 1,197 1,198 6 187,564 2018 1,108 1,104 1,072 1,058 1,056 1,055 1,054 18 156,295 2019 1,018 1,010 991 986 971 967 10 139,762 2020 805 782 775 741 740 23 96,731 2021 881 886 852 846 57 102,129 2022 928 1,018 1,009 132 107,911 2023 1,138 1,129 270 107,253 2024 1,212 622 94,233 Total $ 10,862 Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2015 $ 475 $ 935 $ 1,142 $ 1,243 $ 1,292 $ 1,304 $ 1,310 $ 1,313 $ 1,314 $ 1,315 2016 505 968 1,188 1,308 1,345 1,363 1,373 1,377 1,380 2017 441 836 1,033 1,123 1,161 1,180 1,187 1,189 2018 359 710 888 965 1,011 1,028 1,033 2019 323 654 816 897 933 949 2020 238 486 615 679 709 2021 247 553 691 760 2022 301 662 813 2023 329 731 2024 361 Total $ 9,240 Personal Automobile Physical Damage Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2022 2023 2024 IBNR Claims 2022 $ 533 $ 549 $ 539 $ 3 239,634 2023 574 544 3 234,247 2024 557 28 199,915 Total $ 1,640 Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2022 2023 2024 2022 $ 498 $ 538 $ 536 2023 513 541 2024 497 Total $ 1,574 Homeowners Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 IBNR Claims 2015 $ 690 $ 703 $ 690 $ 684 $ 684 $ 684 $ 684 $ 684 $ 682 $ 682 $ — 120,023 2016 669 673 663 658 658 658 658 658 658 — 119,818 2017 866 889 884 783 775 774 771 769 4 124,780 2018 903 910 673 642 639 645 642 8 102,924 2019 501 475 470 468 467 465 1 84,810 2020 525 512 513 505 499 5 88,546 2021 502 501 491 485 5 77,320 2022 499 507 498 9 64,118 2023 584 573 28 68,405 2024 605 158 58,223 Total $ 5,876 Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Accident Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2015 $ 487 $ 645 $ 665 $ 674 $ 680 $ 681 $ 681 $ 682 $ 682 $ 682 2016 481 621 640 649 653 655 656 657 658 2017 538 747 795 757 761 762 761 763 2018 484 712 616 619 627 626 628 2019 318 425 445 458 460 463 2020 335 454 478 486 490 2021 305 440 464 473 2022 298 453 476 2023 390 521 2024 367 Total $ 5,521 Group Long-Term Disability Undiscounted Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Incurral Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 IBNR Reserves Claims Reported 2015 $ 1,595 $ 1,442 $ 1,422 $ 1,420 $ 1,401 $ 1,385 $ 1,380 $ 1,380 $ 1,380 $ 1,385 $ — 32,589 2016 1,651 1,481 1,468 1,437 1,417 1,409 1,401 1,400 1,407 — 33,307 2017 1,597 1,413 1,358 1,316 1,304 1,296 1,289 1,294 — 30,929 2018 1,647 1,387 1,309 1,277 1,276 1,271 1,279 — 28,428 2019 1,650 1,424 1,327 1,284 1,287 1,277 — 27,467 2020 1,686 1,407 1,323 1,282 1,260 — 25,862 2021 1,768 1,521 1,417 1,351 1 27,156 2022 1,842 1,566 1,452 6 25,952 2023 1,988 1,700 44 28,026 2024 1,960 970 18,035 Total $ 14,365 Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Incurral Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2015 $ 108 $ 460 $ 687 $ 806 $ 891 $ 962 $ 1,025 $ 1,078 $ 1,125 $ 1,164 2016 112 479 705 819 907 981 1,043 1,100 1,144 2017 109 452 658 757 842 911 970 1,017 2018 105 447 639 743 827 897 954 2019 101 454 650 751 832 895 2020 100 458 663 767 839 2021 101 493 720 820 2022 101 496 719 2023 116 562 2024 129 Total $ 8,243 Group Life and Accident, excluding Premium Waiver Undiscounted Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Incurral Year 2022 2023 2024 IBNR Reserves Claims Reported 2022 $ 2,061 $ 2,053 $ 2,056 $ 12 72,225 2023 2,108 2,092 25 74,958 2024 2,065 380 59,084 Total $ 6,213 Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance For the years ended December 31, (Unaudited) Incurral Year 2022 2023 2024 2022 $ 1,562 $ 2,018 $ 2,040 2023 1,572 2,053 2024 1,576 Total $ 5,669

Reserve for Future Policy Ben_2

Reserve for Future Policy Benefits (Tables)	12 Months Ended
	Dec. 31, 2024
Insurance Loss Reserves [Abstract]
Liability for Future Policy Benefit, Activity	Rollforward of Reserve for Future Policy Benefits For the year ended December 31, 2024 2023 2022 Payout Annuities Life Conversions Paid-up Life Payout Annuities Life Conversions Paid-up Life Payout Annuities Life Conversions Paid-up Life Present Value of Expected Net Premiums Balance, beginning of the period $ 49 $ 47 $ 58 Balance, ending of the period $ 45 $ 49 $ 47 Present Value of Expected Future Policy Benefits Beginning balance at single-A rate $ 137 $ 113 $ 185 $ 140 $ 112 $ 192 $ 188 $ 152 $ 262 Beginning adjustment for changes in single-A rate 7 (11) (32) 4 (14) (39) 47 19 14 Beginning balance at original discount rate 130 124 217 136 126 231 141 133 248 Effect of changes in cash flow assumptions 2 2 — (2) — — — — — Effect of actual variances from expected experience 1 3 (1) 1 7 (1) — 5 — Adjusted beginning balance 133 129 216 135 133 230 141 138 248 Interest accrual and other 7 20 7 7 20 8 8 17 7 Benefit Payments (12) (28) (22) (12) (29) (21) (13) (29) (24) Ending balance at original discount rate 128 121 201 130 124 217 136 126 231 Ending adjustment for changes in single-A rate — (15) (33) 7 (11) (32) 4 (14) (39) Ending balance at single-A rate $ 128 $ 106 $ 168 $ 137 $ 113 $ 185 $ 140 $ 112 $ 192 Net reserve for future policy benefits $ 128 $ 61 $ 168 $ 137 $ 64 $ 185 $ 140 $ 65 $ 192 Weighted-average duration of the reserve for future policy benefits (years) 9.2 11.0 6.3 9.0 12.2 6.4 9.2 11.4 6.4 Net Reserve for Future Policy Benefits As of December 31, 2024 2023 2022 Payout Annuities $ 128 $ 137 $ 140 Life Conversions 61 64 65 Paid-up Life 168 185 192 Deferred Profit Liability 17 20 19 Other 74 78 86 Total $ 448 $ 484 $ 502 Undiscounted Expected Future Gross Premiums and Benefit Payments As of December 31, 2024 2023 2022 Payout Annuities [1] Expected future benefit payments $ 256 $ 257 $ 272 Life Conversions Expected future gross premiums $ 106 $ 114 $ 120 Expected future benefit payments $ 198 $ 204 $ 212 Paid-up Life [1] Expected future benefit payments $ 260 $ 281 $ 300 [1]Payout Annuities and Paid-up Life have no expected future gross premiums. Weighted-Average Interest Rates As of December 31, 2024 2023 2022 Payout Annuities Interest accretion rate 5.6 % 5.6 % 5.6 % Current discount rate 5.5 % 5.0 % 5.3 % Life Conversions Interest accretion rate 4.3 % 4.2 % 4.1 % Current discount rate 5.6 % 5.1 % 5.3 % Paid-up Life Interest accretion rate 2.9 % 2.9 % 2.9 % Current discount rate 5.3 % 5.0 % 5.2 %

Other Policyholder Funds and _2

Other Policyholder Funds and Benefits Payable (Tables)	12 Months Ended
	Dec. 31, 2024
Insurance Loss Reserves [Abstract]
Policyholder Account Balance	Universal Life Long Duration Contracts Rollforward For the year ended December 31, 2024 2023 2022 Balance, beginning of year $ 223 $ 232 $ 253 Premiums Received 13 14 15 Policy Charges (23) (21) (23) Surrenders and Withdrawals (5) (6) (4) Benefit Payments (9) (6) (20) Interest Credited 7 10 11 Balance, End of Year $ 206 $ 223 $ 232 Weighted-average crediting rate 4.3 % 4.2 % 4.2 % Net Amount at Risk [1] $ 824 $ 917 $ 987 Cash Surrender Value $ 205 $ 221 $ 229

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2024
Debt Disclosure [Abstract]
Schedule of Debt	Long-term Debt by Issuance As of December 31, 2024 2023 Revolving Credit Facilities $ — $ — Senior Notes and Debentures 2.8% Notes, due 2029 600 600 5.95% Notes, due 2036 300 300 6.625% Notes, due 2040 295 295 6.1% Notes, due 2041 409 409 6.625% Notes, due 2042 178 178 4.3% Notes, due 2043 300 300 4.4% Notes, due 2048 500 500 3.6% Notes, due 2049 800 800 2.9% Notes, due 2051 600 600 Junior Subordinated Debentures 3-Month term SOFR + 0.26161% + 2.125% Notes, due 2067 [1] 500 500 Total Notes and Debentures 4,482 4,482 Unamortized discount and debt issuance cost [2] (116) (120) Total Debt 4,366 4,362 Less: Current maturities — — Long-Term Debt $ 4,366 $ 4,362 [1] The Company has an interest rate swap agreement expiring February 15, 2027 to effectively convert the variable interest payments based on 3-month term Secured Overnight Financing Rate (“SOFR”) plus a spread adjustment of 0.26161% plus 2.125 for this debenture. [2] This amount includes unamortized discount of $68 and $70 as of December 31, 2024 and 2023, respectively, on the 6.1% Notes, due 2041.
Long-Term Debt Maturities	Long-term Debt Maturities (at par value) as of December 31, 2024 2024 - Current maturities $ — 2026 $ — 2027 $ — 2028 $ — 2029 $ 600 Thereafter $ 3,882

Equity (Tables)

Equity (Tables)	12 Months Ended
	Dec. 31, 2024
Equity [Abstract]
Statutory Accounting Practices Disclosure	U.S. Statutory Net Income For the years ended December 31, 2024 2023 2022 Employee Benefits Insurance Subsidiary $ 576 $ 592 $ 378 Property and Casualty Insurance Subsidiaries 2,112 1,887 1,514 Total $ 2,688 $ 2,479 $ 1,892 U.S. Statutory Capital As of December 31, 2024 2023 Employee Benefits Insurance Subsidiary $ 2,708 $ 2,748 Property and Casualty Insurance Subsidiaries 13,294 12,549 Total $ 16,002 $ 15,297

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2024
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	Income Tax Expense For the years ended December 31, 2024 2023 2022 Income tax expense (benefit) Current - U.S. federal $ 783 $ 582 $ 550 Foreign 2 — (1) Total current 785 582 549 Deferred - U.S. federal (57) 6 (124) Foreign 10 (4) 18 Total deferred (47) 2 (106) Total income tax expense $ 738 $ 584 $ 443
Income Tax Rate Reconciliation	Income Tax Rate Reconciliation For the years ended December 31, 2024 2023 2022 Tax provision at U.S. federal statutory rate $ 808 $ 648 $ 474 Nontaxable net investment income (40) (41) (29) Other (30) (23) (2) Provision for income taxes $ 738 $ 584 $ 443
Deferred Tax Assets (Liabilities)	Deferred Tax Assets (Liabilities) As of December 31, 2024 2023 Deferred tax assets Loss reserves and tax discount $ 550 $ 517 Unearned premium reserve and other underwriting related reserves 517 483 Employee benefits 181 172 Net unrealized losses on investments 394 387 Net operating loss carryover 41 45 Other — 1 Total deferred tax assets 1,683 1,605 Valuation allowance — (12) Deferred tax assets, net of valuation allowance 1,683 1,593 Deferred tax liabilities Deferred acquisition costs (183) (163) Investment-related items (167) (110) Other depreciable and amortizable assets (91) (147) Other (13) — Total deferred tax liabilities (454) (420) Net deferred tax asset $ 1,229 $ 1,173
Schedule of Unrecognized Tax Benefits Roll Forward	Rollforward of Unrecognized Tax Benefits For the years ended December 31, 2024 2023 2022 Balance, beginning of period $ 26 $ 22 $ 16 Gross increases - tax positions in current period 3 5 6 Gross decreases - tax positions in current period (1) — — Lapse of statute of limitations (4) (1) — Balance, end of period $ 24 $ 26 $ 22

Changes in and Reclassificati_2

Changes in and Reclassifications From Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2024
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Changes in AOCI, Net of Tax	Changes in AOCI, Net of Tax for the Year Ended December 31, 2024 Changes in Net Unrealized Gain (Loss) on Fixed Maturities, AFS Unrealized Losses on Fixed Maturities, AFS with ACL Net Gain (Loss) on Cash Flow Hedging Instruments Foreign Currency Translation Adjustments Liability for Future Policy Benefits Adjustments Pension and Other Postretirement Plan Adjustments AOCI, Beginning balance $ (1,482) $ (8) $ 21 $ 37 $ 25 $ (1,442) $ (2,849) OCI before reclassifications (241) 2 27 (10) 10 (34) (246) Amounts reclassified from AOCI 169 1 (3) — — 32 199 OCI, before tax (72) 3 24 (10) 10 (2) (47) Income tax benefit (expense) 15 (1) (5) 2 (2) 1 10 OCI, net of tax (57) 2 19 (8) 8 (1) (37) Ending balance $ (1,539) $ (6) $ 40 $ 29 $ 33 $ (1,443) $ (2,886) Changes in AOCI, Net of Tax for the Year Ended December 31, 2023 Changes in Net Unrealized Gain (Loss) on Fixed Maturities, AFS Unrealized Losses on Fixed Maturities, AFS with ACL Net Gain (Loss) on Cash Flow Hedging Instruments Foreign Currency Translation Adjustments Liability for Future Policy Benefits Adjustments Pension and Other Postretirement Plan Adjustments AOCI, Beginning balance $ (2,594) $ (7) $ 40 $ 31 $ 35 $ (1,346) $ (3,841) OCI before reclassifications 1,275 (5) (25) 8 (13) (148) 1,092 Amounts reclassified from AOCI 133 4 1 — — 27 165 OCI, before tax 1,408 (1) (24) 8 (13) (121) 1,257 Income tax benefit (expense) (296) — 5 (2) 3 25 (265) OCI, net of tax 1,112 (1) (19) 6 (10) (96) 992 Ending balance $ (1,482) $ (8) $ 21 $ 37 $ 25 $ (1,442) $ (2,849) Changes in AOCI, Net of Tax for the Year ended December 31, 2022 Changes in Net Unrealized Gain (Loss) on Fixed Maturities, AFS Unrealized Losses on Fixed Maturities, AFS with ACL Net Gain (Loss) on Cash Flow Hedging Instruments Foreign Currency Translation Adjustments Liability for Future Policy Benefits Adjustments Pension and Other Postretirement Plan Adjustments AOCI, Beginning balance $ 1,631 $ (2) $ 6 $ 41 $ (59) $ (1,489) $ 128 OCI before reclassifications (5,630) (6) 56 (13) 119 119 (5,355) Amounts reclassified from AOCI 282 — (13) — — 62 331 OCI, before tax (5,348) (6) 43 (13) 119 181 (5,024) Income tax benefit (expense) 1,123 1 (9) 3 (25) (38) 1,055 OCI, net of tax (4,225) (5) 34 (10) 94 143 (3,969) Ending balance $ (2,594) $ (7) $ 40 $ 31 $ 35 $ (1,346) $ (3,841)
Reclassifications from AOCI	Reclassifications from AOCI AOCI Amount Reclassified from AOCI Affected Line Item in the Consolidated Statement of Operations For the year ended December 31, 2024 For the year ended December 31, 2023 For the year ended December 31, 2022 Net Unrealized Gain (Loss) on Fixed Maturities, AFS Fixed maturities, AFS $ (169) $ (133) $ (282) Net realized gains (losses) (169) (133) (282) Total before tax (35) (28) (59) Income tax expense $ (134) $ (105) $ (223) Net income Unrealized Loss on Fixed Maturities, AFS with ACL Fixed maturities, AFS $ (1) $ (4) $ — Net realized gains (losses) (1) (4) — Total before tax — (1) — Income tax expense $ (1) $ (3) $ — Net income Net Gain (Loss) on Cash Flow Hedging Instruments Interest rate swaps $ (25) $ (26) $ 6 Net investment income Interest rate swaps 16 15 (2) Interest expense Foreign currency swaps 12 10 9 Net investment income 3 (1) 13 Total before tax 1 — 3 Income tax expense $ 2 $ (1) $ 10 Net income Pension and Other Postretirement Plan Adjustments Amortization of prior service credit $ 7 $ 7 $ 7 Insurance operating costs and other expenses Amortization of actuarial loss (39) (34) (69) Insurance operating costs and other expenses (32) (27) (62) Total before tax (7) — (13) Income tax expense (25) (27) (49) Net income Total amounts reclassified from AOCI $ (158) $ (136) $ (262) Net income

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2024
Retirement Benefits [Abstract]
Assumptions Used in Calculating the Benefit Obligations and the Net Amount Recognized	Assumptions Used in Calculating the Benefit Obligations and the Net Amount Recognized For the years ended December 31, 2024 2023 2022 Weighted Average Assumptions used to determine benefit obligations Discount rate: U.S. Pension Plan 5.65 % 5.15 % 5.43 % Other Pension Plans 5.59 % 5.14 % 5.40 % Other postretirement benefits 5.56 % 5.13 % 5.39 % Interest crediting rate on cash balance plan 4.30 % 4.36 % 3.89 % Weighted Average Assumptions used to determine net periodic benefit costs: Discount rate: U.S. Pension Plan 5.15 % 5.43 % 2.91 % Other Pension Plans 5.13 % 5.40 % 2.83 % Other postretirement benefits 5.13 % 5.39 % 2.72 % Expected long-term rate of return on plan assets: U.S. Pension Plan 5.90 % 6.10 % 5.10 % Other Pension Plans 4.00 % 4.40 % 3.30 % Other postretirement benefits 4.50 % 4.50 % 4.80 % Assumed Health Care Cost Trend Rates Pre-65 health care cost trend rate 6.50 % 8.00 % 7.00 % Post-65 health care cost trend rate N/A N/A N/A Rate to which the cost trend rate is assumed to decline (the ultimate trend rate) 4.00 % 4.50 % 4.50 % Year that the rate reaches the ultimate trend rate 2045 2038 2032
Schedule of Net Funded Status	U.S. Pension Plan Other Pension Plans Total Pension Plans Other Postretirement Benefits For the years ended December 31, 2024 2023 2024 2023 2024 2023 2024 2023 Change in Benefit Obligation Benefit obligation — beginning of year $ 3,269 $ 3,156 $ 334 $ 334 $ 3,603 $ 3,490 $ 138 $ 143 Service cost 2 3 — — 2 3 — — Interest cost 160 163 16 17 176 180 7 7 Plan participants’ contributions — — — — — — 7 8 Actuarial loss (gain) (9) 38 2 2 (7) 40 (3) 3 Changes in assumptions (146) 100 (12) 8 (158) 108 (4) 3 Benefits paid [1] (201) (191) (27) (27) (228) (218) (23) (26) Benefit obligation — end of year [2] $ 3,075 $ 3,269 $ 313 $ 334 $ 3,388 $ 3,603 $ 122 $ 138 Change in Plan Assets Fair value of plan assets — beginning of year $ 3,562 $ 3,513 $ 11 $ 11 $ 3,573 $ 3,524 $ 18 $ 30 Actual return on plan assets 34 254 — — 34 254 — 1 Employer contributions [3] — — — 1 — 1 6 5 Plan participants' contributions [3] — — — — — — 7 8 Benefits paid [1] (201) (191) (1) (1) (202) (192) (23) (26) Expenses paid (8) (14) — — (8) (14) — — Foreign exchange adjustment — — (1) — (1) — — — Fair value of plan assets — end of year $ 3,387 $ 3,562 $ 9 $ 11 $ 3,396 $ 3,573 $ 8 $ 18 Funded status — end of year $ 312 $ 293 $ (304) $ (323) $ 8 $ (30) $ (114) $ (120) Amounts Recognized in the Consolidated Balance Sheets Other assets $ 312 $ 293 $ — $ — $ 312 $ 293 $ — $ — Other liabilities $ — $ — $ (304) $ (323) $ (304) $ (323) $ (114) $ (120) [1] Other postretirement benefits paid represent payments from plan assets for non-key employee postretirement medical benefits, Company assets and plan participants' contributions. [2] As of December 31, 2024 and 2023, the Accumulated Benefit Obligation is equal to the Projected Benefit Obligation. [3] Employer and plan participants' contributions for the Other Postretirement Benefits represent funding from Company and plan participant assets.
Net Periodic Cost (Benefit)	Net Periodic Cost (Benefit) Pension Benefits Other Postretirement Benefits For the years ended December 31, 2024 2023 2022 2024 2023 2022 Service cost $ 2 $ 3 $ 4 $ — $ — $ — Interest cost 176 180 111 7 7 4 Expected return on plan assets (230) (235) (202) (1) (1) (2) Amortization of prior service credit — — — (7) (7) (7) Amortization of actuarial loss 34 29 62 5 5 7 Net periodic cost (benefit) $ (18) $ (23) $ (25) $ 4 $ 4 $ 2
Amounts Recognized in Other Comprehensive Income (Loss)	Amounts Recognized in Other Comprehensive Income (Loss) Pension Benefits Other Postretirement Benefits For the years ended December 31, 2024 2023 2022 2024 2023 2022 Amortization of actuarial loss $ 34 $ 29 $ 62 $ 5 $ 5 $ 7 Amortization of prior service credit — — — (7) (7) (7) Net actuarial gain (loss) (41) (142) 89 7 (6) 30 Prior service cost (credit) — — — — — — Total $ (7) $ (113) $ 151 $ 5 $ (8) $ 30
Amounts in Accumulated Other Comprehensive Income (Loss), Before Tax, not yet Recognized as Components of Net Periodic Benefit Cost	Amounts in Accumulated Other Comprehensive Income (Loss), Before Tax, not yet Recognized as Components of Net Periodic Benefit Cost Pension Benefits Other Postretirement Benefits As of December 31, 2024 2023 2022 2024 2023 2022 Net loss $ (1,784) $ (1,777) $ (1,664) $ (76) $ (88) $ (87) Prior service credit — — — 33 40 47 Total $ (1,784) $ (1,777) $ (1,664) $ (43) $ (48) $ (40)
Plan Assets	Target Asset Allocation Ranges Pension Plans Other Postretirement Plans Minimum Maximum Minimum Maximum Equity securities — % 20 % — % — % Fixed income securities 75 % 95 % 100 % 100 % Limited partnerships — % 25 % — % — % Pension Plan Assets at Fair Value As of December 31, 2024 As of December 31, 2023 Asset Category Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Short-term investments: $ 164 $ — $ — $ 164 $ 187 $ — $ — $ 187 Fixed Income Securities: Corporate — 1,586 33 1,619 — 1,643 36 1,679 RMBS — 105 — 105 — 111 — 111 U.S. Treasuries 8 278 — 286 — 271 — 271 Foreign government — 9 9 18 — 11 10 21 CMBS — 28 1 29 — 49 1 50 Other fixed income [1] — 162 — 162 — 160 — 160 Mortgage Loans — — 131 131 — — 143 143 Equity Securities: Domestic 14 4 — 18 11 23 — 34 International — 37 — 37 — 45 — 45 Total pension plan assets at fair value, in the fair value hierarchy [2] 186 2,209 174 2,569 198 2,313 190 2,701 Other Investments, at net asset value [3]: Limited partnerships 778 826 Total pension plan assets at fair value $ 186 $ 2,209 $ 174 $ 3,347 $ 198 $ 2,313 $ 190 $ 3,527 [1] Includes ABS, municipal bonds and CLOs. [2] Excludes $49 and $46 as of December 31, 2024 and 2023, respectively, of investment receivables net of investment payables that are excluded from this disclosure requirement because they are trade receivables in the ordinary course of business where the carrying amount approximates fair value. [3] Investments that are measured at net asset value per share or an equivalent and have not been classified in the fair value hierarchy. Other Postretirement Plan Assets at Fair Value As of December 31, 2024 As of December 31, 2023 Asset Category Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Short-term investments $ 8 $ — $ — $ 8 $ 16 $ — $ — $ 16 Fixed Income Securities: U.S. Treasuries — — — — — 2 — 2 Total other postretirement plan assets at fair value $ 8 $ — $ — $ 8 $ 16 $ 2 $ — $ 18
Pension Plan Assets Fair Value Measurements Using Significant Unobservable Inputs	Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3) Assets Corporate Foreign government Mortgage loans Other [1] Totals Fair Value as of January 1, 2024 $ 36 $ 10 $ 143 $ 1 $ 190 Realized gains, net — — — — — Changes in unrealized gains (losses), net — (1) 1 — — Purchases 5 — — — 5 Sales (8) — (13) — (21) Transfers into Level 3 [2] — — — — — Transfers out of Level 3 [2] — — — — — Fair Value as of December 31, 2024 $ 33 $ 9 $ 131 $ 1 $ 174 Fair Value as of January 1, 2023 $ 31 $ 1 $ 165 $ 1 $ 198 Realized gains (losses), net — — (3) — (3) Changes in unrealized gains (losses), net 2 (1) 8 — 9 Purchases — 10 3 — 13 Sales — — (30) — (30) Transfers into Level 3 [2] 5 — — — 5 Transfers out of Level 3 [2] (2) — — — (2) Fair Value as of December 31, 2023 $ 36 $ 10 $ 143 $ 1 $ 190 [1] "Other" includes CMBS. [2]
Amounts of Benefits Expected to be Paid over the next Ten Years from Pension and other Postretirement Plans	Amounts of Benefits Expected to be Paid over the next Ten Years from Pension and other Postretirement Plans as of December 31, 2024 Pension Benefits Other Postretirement Benefits 2025 $ 249 $ 15 2026 256 13 2027 261 12 2028 267 11 2029 262 11 2030 - 2034 1,304 46 Total $ 2,599 $ 108

Stock Compensation Plans (Table

Stock Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2024
Share-Based Payment Arrangement [Abstract]
Stock-Based Compensation Expense	Stock-Based Compensation Expense For the years ended December 31, 2024 2023 2022 Stock-based compensation plans expense $ 133 $ 125 $ 131 Income tax benefit (21) (22) (22) Excess tax benefit on awards vested, exercised and expired (21) (12) (12) Total stock-based compensation plans expense, net of tax $ 91 $ 91 $ 97
Stock Compensation Valuation Assumptions	Stock Options Valuation Assumptions For the years ended December 31, 2024 2023 2022 Expected dividend yield 1.8% 2.0% 2.3% Expected annualized spot volatility 19.2 % - 22.7% 24.5 % - 26.0% 28.3 % - 29.6% Weighted average annualized volatility 21.7% 25.4% 28.8% Risk-free spot rate 4.3 % - 5.5% 3.8 % - 5.1% (0.04) % - 2.0% Expected term 7.4 years 6.7 years 6.4 years
Non-qualified Stock Option Activity Under the Incentive Stock Plan	Non-qualified Stock Option Activity Under the Stock Incentive Plan Number of Options (in thousands) Weighted Average Exercise Price Weighted Average Remaining Contractual Term Aggregate Intrinsic Value For the year ended December 31, 2024 Outstanding at beginning of year 6,071 $ 55.92 Granted 270 $ 95.74 Exercised (1,823) $ 50.45 Forfeited — $ — Expired — $ — Outstanding at end of year 4,518 $ 60.51 5.4 $ 221 Outstanding, fully vested and expected to vest 4,494 $ 60.40 5.4 $ 221 Exercisable at end of year 3,711 $ 55.85 4.8 $ 199
Assumptions	Assumptions for Total Stockholder Return Performance Shares For the years ended December 31, 2024 2023 2022 Volatility of common stock 21.7% 33.0% 35.9% Average volatility of peer companies 20.0 % - 33.0% 26.0 % - 41.0% 27.0 % - 46.0% Average correlation coefficient of peer companies 42.0% 52.0% 68.0% Risk-free spot rate 4.4% 4.4% 1.8% Term 3.0 years 3.0 years 3.0 years
Non-vested Share Award Activity Under the Incentive Stock Plan	Non-vested Share Award Activity Under the Stock Incentive Plan Restricted Stock Units Performance Shares Number of Shares (in thousands) Weighted-Average Grant-Date Fair Value Number of Shares (in thousands) Weighted-Average Grant date Fair Value Non-vested shares For the year ended December 31, 2024 Non-vested at beginning of year 3,259 $ 65.44 583 $ 77.97 Granted 837 $ 96.34 338 $ 103.08 Performance based adjustment, net 252 $ 71.00 Vested (1,281) $ 53.09 (567) $ 71.30 Forfeited (137) $ 77.97 (12) $ 88.19 Non-vested at end of year 2,678 $ 80.36 594 $ 95.49

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2024
Leases [Abstract]
Lease, Cost	Components of Lease Expense For the years ended December 31, 2024 2023 2022 Operating lease cost $ 35 $ 36 $ 40 Short-term lease cost 1 — — Variable lease cost 1 (2) — Sublease income (3) (4) (4) Total lease costs included in insurance operating costs and other expenses $ 34 $ 30 $ 36 Supplemental Operating Lease Information For the years ended December 31, 2024 2023 2022 Operating cash flows for operating leases (for the twelve months ended) $ 33 $ 37 $ 56 Right-of-use asset obtained in exchange for new operating lease liabilities 25 40 6 Weighted-average remaining lease term in years for operating leases 6 years 7 years 6 years Weighted-average discount rate for operating leases 4.3 % 4.0 % 3.0 %
Future Minimum Lease Payments	Maturities of Operating Lease Liabilities as of December 31, 2024 Operating Leases 2025 $ 31 2026 29 2027 27 2028 23 2029 19 Thereafter 40 Total lease payments 169 Less: Discount on lease payments to present value 24 Total lease liability $ 145

Restructuring and Related Act_2

Restructuring and Related Activities (Tables)	12 Months Ended
	Dec. 31, 2024
Restructuring and Related Activities [Abstract]
Restructuring and Related Costs	Restructuring and Other Costs, Before Tax Incurred in the Year Ended December 31, 2022 Incurred in the Year Ended December 31, 2023 Incurred in the Year Ended December 31, 2024 Cumulative Incurred in the Year Ended December 31, 2024 Total Amount Expected to be Incurred Severance benefits $ (7) $ (6) $ — $ 35 $ 35 IT costs 8 5 — 25 25 Professional fees and other expenses 12 7 2 67 67 Total restructuring and other costs, before tax $ 13 $ 6 $ 2 $ 127 $ 127
Schedule of Restructuring Reserve by Type of Cost	Accrued Restructuring and Other Costs Year Ended December 31, 2024 Severance Benefits and Related Costs IT Costs Professional Fees and Other Total Restructuring and Other Costs Liability Balance, beginning of period $ — $ — $ — $ — Incurred — — 2 2 Payments — — (2) (2) Balance, end of period $ — $ — $ — $ — Accrued Restructuring and Other Costs Year Ended December 31, 2023 Severance Benefits and Related Costs IT Costs Professional Fees and Other Total Restructuring and Other Costs Liability Balance, beginning of period $ 7 $ — $ — $ 7 Incurred (6) 5 7 6 Payments (1) (5) (7) (13) Balance, end of period $ — $ — $ — $ —

Basis of Presentation and Sig_2

Basis of Presentation and Significant Accounting Policies (Details) - USD ($)	12 Months Ended
	Dec. 31, 2027	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Participating dividends to policyholders			$ 0	$ 0	$ 0
Derivative Liability, Statement of Financial Position [Extensible Enumeration]			Other investments, Other liabilities	Other investments, Other liabilities
Deposit Contracts, Liabilities			$ 0	$ 0
Accumulated depreciation			2,500,000,000	2,400,000,000
Depreciation expense			177,000,000	204,000,000	213,000,000
Hosting Arrangement, Service Contract, Implementation Cost, Expense, Amortization			108,000,000	85,000,000	78,000,000
Policyholder Dividends, Expense			$ 39,000,000	$ 39,000,000	29,000,000
Equity Security, FV-NI, Contractual Sale Restriction, Nature of Restriction and Circumstance for Lapse			Level 3 includes investments that have contractual sales restrictions that require consent to sell and are in place for the duration that the securities are held by the Company.	Level 3 includes investments that have contractual sales restrictions that require consent to sell and are in place for the duration that the securities are held by the Company.
Change in Accounting Principle, Accounting Standards Update, Adoption Date			Dec. 31, 2024
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]			true
Accounting Standards Update [Extensible Enumeration]			Accounting Standards Update 2023-07 [Member]
Subsequent Event [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Dec. 31, 2027	Dec. 31, 2025
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2024-03 [Member]	Accounting Standards Update 2023-09 [Member]
Change in Accounting Principle, Accounting Standards Update, Transition Option Elected [Extensible Enumeration]	Accounting Standards Updates 2024-03 Prospective [Member]
Minimum [Member] | Other Intangible Assets [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Finite-Lived Intangible Asset, Useful Life			1 year
Maximum | Other Intangible Assets [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Finite-Lived Intangible Asset, Useful Life			15 years
Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred Revenue			$ 64,000,000	$ 209,000,000
Policyholder Benefits and Claims Incurred, Ceded			300,000,000
Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group | Remaining [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reinsurance, Excess Retention, Amount Reinsured, Per Policy			0
Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group | Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reinsurance, Excess Retention, Amount Reinsured, Per Policy			300,000,000
Reinsurance Policy, Type [Axis]: Retroactive Reinsurance [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Paid loss and loss adjustment expenses			1,600,000,000	1,700,000,000
Deferred Revenue, Additions			(83,000,000)	(194,000,000)	$ (229,000,000)
Reinsurance Policy, Type [Axis]: Retroactive Reinsurance [Member] | Other liabilities
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred Revenue			$ 914,000,000	$ 997,000,000
Property and Casualty Insurance Subsidiaries
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Participating Insurance, Percentage of Premium Income			6%	6%	7%
Policyholder Benefits and Claims Incurred, Ceded			$ 1,241,000,000	$ 1,043,000,000	$ 1,338,000,000

Earnings Per Common Share - Com

Earnings Per Common Share - Computation of Basic and Diluted Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Earnings
Net income (loss)	$ 3,111	$ 2,504	$ 1,819
Less: Preferred stock dividends	21	21	21
Net income available to common stockholders	$ 3,090	$ 2,483	$ 1,798
Shares
Weighted average common shares outstanding, basic	293.9	307.1	324.8
Dilutive effect of stock-based awards under compensation plans	4.7	4.4	4.7
Weighted average common shares outstanding and dilutive potential common shares [1]	298.6	311.5	329.5
Basic
Earnings Per Share, Basic	$ 10.51	$ 8.09	$ 5.54
Diluted
Net income available to common stockholders	$ 10.35	$ 7.97	$ 5.46

Segment Information - Additiona

Segment Information - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($) segment	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Segment Reporting [Abstract]
Number of Reportable Segments | segment	5
Disclosure on Geographic Areas, Description of Revenue from External Customers	Over 95% of the Company’s revenues are generated in the United States (“U.S.”). The remaining revenues are generated in the U.K. and other international locations.
Interest Expense | $	$ 199	$ 199	$ 213

Segment Information - Reconcili

Segment Information - Reconciliation of Revenue from Segments to Consolidated (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Earned premiums and fee income	$ 23,940	$ 22,326	$ 20,739
Total net investment income	2,568	2,305	2,177
Net realized losses	(61)	(188)	(627)
Other Income	88	84	73
Revenues	26,535	24,527	22,362
Benefits, losses and expenses	22,686	21,439	20,100
Segment Reporting, Other Segment Item, Amount	77	62	67
Income tax expense	738	584	443
Net income (loss)	3,111	2,504	1,819
Amortization of deferred policy acquisition costs ("DAC")	2,282	2,044	1,824
Amortization of other intangible assets	71	71	71
P&C Personal Insurance [Member] | AARP Members
Segment Reporting Information [Line Items]
Earned premiums and fee income	3,200	2,900	2,700
Operating Segments
Segment Reporting Information [Line Items]
Revenues	26,388	24,413	22,331
Benefits, losses and expenses	22,346	21,097	19,738
Operating Segments | P&C Business Insurance [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	12,764	11,682	10,610
Total net investment income	1,714	1,532	1,415
Net realized losses	(73)	(156)	(385)
Other Income	1	1	(1)
Revenues	14,406	13,059	11,639
Benefits, losses and expenses	11,475	10,470	9,578
Segment Reporting, Other Segment Item, Amount	6	2	11
Income tax expense	576	502	426
Net income (loss)	2,349	2,085	1,624
Amortization of deferred policy acquisition costs ("DAC")	1,993	1,779	1,563
Amortization of other intangible assets	29	29	29
Operating Segments | P&C Personal Insurance [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	3,486	3,117	2,979
Total net investment income	222	171	140
Net realized losses	(14)	(16)	(35)
Other Income	85	81	73
Revenues	3,779	3,353	3,157
Benefits, losses and expenses	3,455	3,347	2,988
Segment Reporting, Other Segment Item, Amount	67	60	56
Income tax expense	49	(15)	22
Net income (loss)	208	(39)	91
Amortization of deferred policy acquisition costs ("DAC")	255	231	228
Amortization of other intangible assets	2	2	2
Operating Segments | Property & Casualty Other Operations [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	0	0	0
Total net investment income	74	69	63
Net realized losses	(4)	(7)	(16)
Other Income	0	0	0
Revenues	70	62	47
Benefits, losses and expenses	228	228	289
Segment Reporting, Other Segment Item, Amount	4	0	0
Income tax expense	(35)	(36)	(52)
Net income (loss)	(127)	(130)	(190)
Amortization of deferred policy acquisition costs ("DAC")	0	0	0
Amortization of other intangible assets	0	0	0
Operating Segments | Employee Benefits [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	6,615	6,515	6,057
Total net investment income	475	469	524
Net realized losses	(24)	(45)	(122)
Other Income	0	0	0
Revenues	7,066	6,939	6,459
Benefits, losses and expenses	6,364	6,271	6,057
Segment Reporting, Other Segment Item, Amount	0	0	0
Income tax expense	141	133	75
Net income (loss)	561	535	327
Amortization of deferred policy acquisition costs ("DAC")	34	34	33
Amortization of other intangible assets	40	40	40
Operating Segments | Hartford Funds
Segment Reporting Information [Line Items]
Earned premiums and fee income	1,035	973	1,044
Total net investment income	20	17	9
Net realized losses	12	10	(24)
Other Income	0	0	0
Revenues	1,067	1,000	1,029
Benefits, losses and expenses	824	781	826
Segment Reporting, Other Segment Item, Amount	0	0	0
Income tax expense	51	45	41
Net income (loss)	192	174	162
Amortization of deferred policy acquisition costs ("DAC")	0	0	0
Amortization of other intangible assets	0	0	0
Operating Segments | Hartford Funds | Third party retail customers [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	960	900	964
Operating Segments | Hartford Funds | Talcott Resolution [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	75	73	80
Operating Segments | Workers' Compensation | P&C Business Insurance [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	3,691	3,670	3,499
Operating Segments | General Liability [Member] | P&C Business Insurance [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	2,218	1,977	1,836
Operating Segments | Marine [Member] | P&C Business Insurance [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	278	256	235
Operating Segments | Package Business [Member] | P&C Business Insurance [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	2,331	2,076	1,844
Operating Segments | Property Insurance [Member] | P&C Business Insurance [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	1,258	1,053	845
Operating Segments | Property Insurance [Member] | P&C Personal Insurance [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	1,061	961	932
Operating Segments | Professional Liability [Member] | P&C Business Insurance [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	824	787	737
Operating Segments | Surety Product Line [Member] | P&C Business Insurance [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	327	321	303
Operating Segments | Assumed Reinsurance [Member] | P&C Business Insurance [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	758	615	467
Operating Segments | Automobiles [Member] | P&C Business Insurance [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	1,079	927	844
Operating Segments | Automobiles [Member] | P&C Personal Insurance [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	2,425	2,156	2,047
Operating Segments | Disability Insurance Policy [Member] | Employee Benefits [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	3,576	3,530	3,310
Operating Segments | Life Insurance Product Line [Member] | Employee Benefits [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	2,617	2,583	2,393
Operating Segments | Insurance, Other [Member] | Employee Benefits [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	$ 422	$ 402	$ 354

Segment Information - Reconci_2

Segment Information - Reconciliation of Other Items from Segments to Consolidated (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Amortization of deferred policy acquisition costs ("DAC")	$ 2,282	$ 2,044	$ 1,824
Insurance operating costs and other expenses	5,258	4,881	4,841
Amortization of other intangible assets	71	71	71
Policyholder Dividends, Expense	39	39	29
Benefits, losses and expenses	22,686	21,439	20,100
Benefits, losses and loss adjustment expenses	14,874	14,238	13,138
Operating Segments
Segment Reporting Information [Line Items]
Benefits, losses and expenses	22,346	21,097	19,738
Operating Segments | P&C Business Insurance [Member]
Segment Reporting Information [Line Items]
Prior accident year development [1]	(231)	(225)	(231)
Amortization of deferred policy acquisition costs ("DAC")	1,993	1,779	1,563
Insurance operating costs and other expenses	1,973	1,837	1,788
Amortization of other intangible assets	29	29	29
Policyholder Dividends, Expense	39	39	29
Benefits, losses and expenses	11,475	10,470	9,578
Operating Segments | P&C Personal Insurance [Member]
Segment Reporting Information [Line Items]
Prior accident year development [1]	(108)	11	(13)
Amortization of deferred policy acquisition costs ("DAC")	255	231	228
Insurance operating costs and other expenses	673	576	594
Amortization of other intangible assets	2	2	2
Benefits, losses and expenses	3,455	3,347	2,988
Operating Segments | Property & Casualty Other Operations [Member]
Segment Reporting Information [Line Items]
Prior accident year development [1]	219	224	280
Amortization of deferred policy acquisition costs ("DAC")	0	0	0
Insurance operating costs and other expenses	9	4	9
Amortization of other intangible assets	0	0	0
Benefits, losses and expenses	228	228	289
Operating Segments | Employee Benefits [Member]
Segment Reporting Information [Line Items]
Amortization of deferred policy acquisition costs ("DAC")	34	34	33
Insurance operating costs and other expenses	1,609	1,514	1,467
Amortization of other intangible assets	40	40	40
Benefits, losses and expenses	6,364	6,271	6,057
Operating Segments | Employee Benefits [Member] | Disability Insurance Policy [Member]
Segment Reporting Information [Line Items]
Benefits, losses and loss adjustment expenses	2,432	2,370	2,263
Operating Segments | Employee Benefits [Member] | Life Insurance Product Line [Member]
Segment Reporting Information [Line Items]
Benefits, losses and loss adjustment expenses	2,060	2,157	2,091
Operating Segments | Employee Benefits [Member] | Insurance, Other [Member]
Segment Reporting Information [Line Items]
Benefits, losses and loss adjustment expenses	189	156	163
Operating Segments | Hartford Funds
Segment Reporting Information [Line Items]
Amortization of deferred policy acquisition costs ("DAC")	0	0	0
Amortization of other intangible assets	0	0	0
Benefits, losses and expenses	824	781	826
Investment Advisory, Management and Administrative Service	289	265	282
Employee Benefits and Share-Based Compensation	131	121	123
Distribution Service	299	289	315
Other General and Administrative Expense	105	106	106
Non-Catastrophe | Operating Segments | P&C Business Insurance [Member]
Segment Reporting Information [Line Items]
Current Year Claims and Claims Adjustment Expense	7,186	6,575	5,959
Non-Catastrophe | Operating Segments | P&C Personal Insurance [Member]
Segment Reporting Information [Line Items]
Current Year Claims and Claims Adjustment Expense	2,351	2,287	1,969
Catastrophes | Operating Segments | P&C Business Insurance [Member]
Segment Reporting Information [Line Items]
Current Year Claims and Claims Adjustment Expense	486	436	441
Catastrophes | Operating Segments | P&C Personal Insurance [Member]
Segment Reporting Information [Line Items]
Current Year Claims and Claims Adjustment Expense	$ 282	$ 240	$ 208

Segment Information - Net Incom

Segment Information - Net Income From Segments to Consolidated (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Earned premiums and fee income	$ 23,940	$ 22,326	$ 20,739
Fee income	1,373	1,300	1,349
Total net investment income	2,568	2,305	2,177
Net realized losses	(61)	(188)	(627)
Other Income	88	84	73
Revenues	26,535	24,527	22,362
Benefits, losses and expenses	22,686	21,439	20,100
Segment Reporting, Other Segment Item, Amount	77	62	67
Income tax expense	738	584	443
Net income (loss)	3,111	2,504	1,819
Amortization of deferred policy acquisition costs ("DAC")	2,282	2,044	1,824
Amortization of other intangible assets	71	71	71
Total assets	80,917	76,780
Reportable Segment, Aggregation before Other Operating Segment
Segment Reporting Information [Line Items]
Earned premiums and fee income	23,900	22,287	20,690
Total net investment income	2,505	2,258	2,151
Net realized losses	(103)	(214)	(582)
Other Income	86	82	72
Revenues	26,388	24,413	22,331
Benefits, losses and expenses	22,346	21,097	19,738
Segment Reporting, Other Segment Item, Amount	77	62	67
Income tax expense	782	629	512
Net income (loss)	3,183	2,625	2,014
Amortization of deferred policy acquisition costs ("DAC")	2,282	2,044	1,824
Amortization of other intangible assets	71	71	71
Total assets	77,905	73,906
Operating Segments
Segment Reporting Information [Line Items]
Revenues	26,388	24,413	22,331
Benefits, losses and expenses	22,346	21,097	19,738
Operating Segments | P&C Business Insurance [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	12,764	11,682	10,610
Total net investment income	1,714	1,532	1,415
Net realized losses	(73)	(156)	(385)
Other Income	1	1	(1)
Revenues	14,406	13,059	11,639
Benefits, losses and expenses	11,475	10,470	9,578
Segment Reporting, Other Segment Item, Amount	6	2	11
Income tax expense	576	502	426
Net income (loss)	2,349	2,085	1,624
Amortization of deferred policy acquisition costs ("DAC")	1,993	1,779	1,563
Amortization of other intangible assets	29	29	29
Total assets	53,296	49,711
Operating Segments | P&C Personal Insurance [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	3,486	3,117	2,979
Total net investment income	222	171	140
Net realized losses	(14)	(16)	(35)
Other Income	85	81	73
Revenues	3,779	3,353	3,157
Benefits, losses and expenses	3,455	3,347	2,988
Segment Reporting, Other Segment Item, Amount	67	60	56
Income tax expense	49	(15)	22
Net income (loss)	208	(39)	91
Amortization of deferred policy acquisition costs ("DAC")	255	231	228
Amortization of other intangible assets	2	2	2
Total assets	6,034	5,579
Operating Segments | Property & Casualty Other Operations [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	0	0	0
Total net investment income	74	69	63
Net realized losses	(4)	(7)	(16)
Other Income	0	0	0
Revenues	70	62	47
Benefits, losses and expenses	228	228	289
Segment Reporting, Other Segment Item, Amount	4	0	0
Income tax expense	(35)	(36)	(52)
Net income (loss)	(127)	(130)	(190)
Amortization of deferred policy acquisition costs ("DAC")	0	0	0
Amortization of other intangible assets	0	0	0
Total assets	4,312	4,235
Operating Segments | Employee Benefits [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	6,615	6,515	6,057
Total net investment income	475	469	524
Net realized losses	(24)	(45)	(122)
Other Income	0	0	0
Revenues	7,066	6,939	6,459
Benefits, losses and expenses	6,364	6,271	6,057
Segment Reporting, Other Segment Item, Amount	0	0	0
Income tax expense	141	133	75
Net income (loss)	561	535	327
Amortization of deferred policy acquisition costs ("DAC")	34	34	33
Amortization of other intangible assets	40	40	40
Total assets	13,502	13,697
Operating Segments | Hartford Funds
Segment Reporting Information [Line Items]
Earned premiums and fee income	1,035	973	1,044
Total net investment income	20	17	9
Net realized losses	12	10	(24)
Other Income	0	0	0
Revenues	1,067	1,000	1,029
Benefits, losses and expenses	824	781	826
Segment Reporting, Other Segment Item, Amount	0	0	0
Income tax expense	51	45	41
Net income (loss)	192	174	162
Amortization of deferred policy acquisition costs ("DAC")	0	0	0
Amortization of other intangible assets	0	0	0
Total assets	761	684
Corporate
Segment Reporting Information [Line Items]
Total net investment income	63	47	26
Net realized losses	42	26	(45)
Other Income	2	2	1
Revenues	147	114	31
Benefits, losses and expenses	263	280	295
Income tax expense	(44)	(45)	(69)
Net income (loss)	(72)	(121)	(195)
Amortization of deferred policy acquisition costs ("DAC")	0	0	0
Amortization of other intangible assets	0	0	0
Total assets	3,012	2,874
Corporate | Investment management and other fees [Member]
Segment Reporting Information [Line Items]
Fee income	$ 40	$ 39	$ 49

Segment Information - Non-insur

Segment Information - Non-insurance Revenue from Customers (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Fee income	$ 1,373	$ 1,300	$ 1,349
Other Income	88	84	73
Revenue from Contract with Customer, Excluding Assessed Tax	1,458	1,382	1,423
Operating Segments | P&C Business Insurance [Member]
Segment Reporting Information [Line Items]
Other Income	1	1	(1)
Operating Segments | P&C Personal Insurance [Member]
Segment Reporting Information [Line Items]
Other Income	85	81	73
Operating Segments | Employee Benefits [Member]
Segment Reporting Information [Line Items]
Other Income	0	0	0
Operating Segments | Hartford Funds
Segment Reporting Information [Line Items]
Other Income	0	0	0
Operating Segments | Installment billing fees [Member] | P&C Business Insurance [Member]
Segment Reporting Information [Line Items]
Fee income	43	41	39
Operating Segments | Installment billing fees [Member] | P&C Personal Insurance [Member]
Segment Reporting Information [Line Items]
Fee income	33	30	30
Operating Segments | Insurance servicing fees [Member] | P&C Personal Insurance [Member]
Segment Reporting Information [Line Items]
Other Income	85	81	73
Operating Segments | Administrative services fees [Member] | Employee Benefits [Member]
Segment Reporting Information [Line Items]
Fee income	222	217	187
Operating Segments | Advisor, distribution and other management fees [Member] | Hartford Funds
Segment Reporting Information [Line Items]
Fee income	1,035	973	1,044
Corporate
Segment Reporting Information [Line Items]
Other Income	2	2	1
Corporate | Investment management and other fees [Member]
Segment Reporting Information [Line Items]
Fee income	40	39	49
Corporate | Other
Segment Reporting Information [Line Items]
Other Income	$ 0	$ 1	$ 1

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value by Hierarchy (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	$ 42,567	$ 39,818
Fixed maturities, at fair value using the fair value option ("FVO Securities")	308	327
Equity securities, at fair value	603	864
Derivative assets	57	(1)
Short-term investments	4,068	3,850
Total assets accounted for at fair value on a recurring basis	47,603	44,858
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	(12)	8
Total liabilities accounted for at fair value on a recurring basis	$ (12)	$ 8
Equity Security, FV-NI, Contractual Sale Restriction, Nature of Restriction and Circumstance for Lapse	Level 3 includes investments that have contractual sales restrictions that require consent to sell and are in place for the duration that the securities are held by the Company.	Level 3 includes investments that have contractual sales restrictions that require consent to sell and are in place for the duration that the securities are held by the Company.
Credit derivatives
Assets accounted for at fair value on a recurring basis
Derivative assets	$ 30	$ (10)
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	(30)	10
Foreign exchange derivatives
Assets accounted for at fair value on a recurring basis
Derivative assets	23	9
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	18	4
Interest rate derivatives
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities		(6)
Equity derivatives
Assets accounted for at fair value on a recurring basis
Derivative assets	4
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	57	18
Fixed maturities, at fair value using the fair value option ("FVO Securities")	0	0
Equity securities, at fair value	372	333
Derivative assets	0	0
Short-term investments	1,271	1,400
Total assets accounted for at fair value on a recurring basis	1,700	1,751
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	0	0
Total liabilities accounted for at fair value on a recurring basis	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Credit derivatives
Assets accounted for at fair value on a recurring basis
Derivative assets	0	0
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Foreign exchange derivatives
Assets accounted for at fair value on a recurring basis
Derivative assets	0	0
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest rate derivatives
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities		0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity derivatives
Assets accounted for at fair value on a recurring basis
Derivative assets	0
Significant Observable Inputs (Level 2)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	39,900	37,563
Fixed maturities, at fair value using the fair value option ("FVO Securities")	111	160
Equity securities, at fair value	144	473
Derivative assets	57	(1)
Short-term investments	2,699	2,425
Total assets accounted for at fair value on a recurring basis	42,911	40,620
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	(12)	8
Total liabilities accounted for at fair value on a recurring basis	(12)	8
Significant Observable Inputs (Level 2) | Credit derivatives
Assets accounted for at fair value on a recurring basis
Derivative assets	30	(10)
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	(30)	10
Significant Observable Inputs (Level 2) | Foreign exchange derivatives
Assets accounted for at fair value on a recurring basis
Derivative assets	23	9
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	18	4
Significant Observable Inputs (Level 2) | Interest rate derivatives
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities		(6)
Significant Observable Inputs (Level 2) | Equity derivatives
Assets accounted for at fair value on a recurring basis
Derivative assets	4
Significant Unobservable Inputs (Level 3)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	2,610	2,237
Fixed maturities, at fair value using the fair value option ("FVO Securities")	197	167
Equity securities, at fair value	87	58
Derivative assets	0	0
Short-term investments	98	25
Total assets accounted for at fair value on a recurring basis	2,992	2,487
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	0	0
Total liabilities accounted for at fair value on a recurring basis	0	0
Significant Unobservable Inputs (Level 3) | Credit derivatives
Assets accounted for at fair value on a recurring basis
Derivative assets	0	0
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	0	0
Significant Unobservable Inputs (Level 3) | Foreign exchange derivatives
Assets accounted for at fair value on a recurring basis
Derivative assets	0	0
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	0	0
Significant Unobservable Inputs (Level 3) | Interest rate derivatives
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities		0
Significant Unobservable Inputs (Level 3) | Equity derivatives
Assets accounted for at fair value on a recurring basis
Derivative assets	0
Fair Value Measured at Net Asset Value Per Share [Member]
Liabilities accounted for at fair value on a recurring basis
Deposit Assets	61	75
Asset-backed securities ("ABS")
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	3,937	3,320
Asset-backed securities ("ABS") | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	0	0
Asset-backed securities ("ABS") | Significant Observable Inputs (Level 2)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	3,915	3,320
Asset-backed securities ("ABS") | Significant Unobservable Inputs (Level 3)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	22	0
Collateralized Loan Obligations [Member]
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	3,250	3,090
Fixed maturities, at fair value using the fair value option ("FVO Securities")		327
Collateralized Loan Obligations [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	0	0
Collateralized Loan Obligations [Member] | Significant Observable Inputs (Level 2)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	3,134	2,977
Collateralized Loan Obligations [Member] | Significant Unobservable Inputs (Level 3)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	116	113
Commercial mortgage-backed securities ("CMBS")
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	2,736	3,125
Commercial mortgage-backed securities ("CMBS") | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	0	0
Commercial mortgage-backed securities ("CMBS") | Significant Observable Inputs (Level 2)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	2,569	2,898
Commercial mortgage-backed securities ("CMBS") | Significant Unobservable Inputs (Level 3)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	167	227
Corporate
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	20,636	17,866
Corporate | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	0	0
Corporate | Significant Observable Inputs (Level 2)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	18,355	16,005
Corporate | Significant Unobservable Inputs (Level 3)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	2,281	1,861
Foreign government/government agencies
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	480	562
Foreign government/government agencies | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	0	0
Foreign government/government agencies | Significant Observable Inputs (Level 2)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	480	562
Foreign government/government agencies | Significant Unobservable Inputs (Level 3)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	0	0
Municipal
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	5,304	6,039
Municipal | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	0	0
Municipal | Significant Observable Inputs (Level 2)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	5,304	6,039
Municipal | Significant Unobservable Inputs (Level 3)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	0	0
Residential mortgage-backed securities ("RMBS")
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	5,230	4,287
Residential mortgage-backed securities ("RMBS") | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	0	0
Residential mortgage-backed securities ("RMBS") | Significant Observable Inputs (Level 2)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	5,206	4,251
Residential mortgage-backed securities ("RMBS") | Significant Unobservable Inputs (Level 3)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	24	36
U.S. Treasuries
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	994	1,529
U.S. Treasuries | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	57	18
U.S. Treasuries | Significant Observable Inputs (Level 2)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	937	1,511
U.S. Treasuries | Significant Unobservable Inputs (Level 3)
Assets accounted for at fair value on a recurring basis
Total fixed maturities, AFS	$ 0	$ 0

Fair Value Measurements - Signi

Fair Value Measurements - Significant Unobservable Inputs - Securities (Details) $ in Millions	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, AFS	$ 42,567	$ 39,818
Short-term investments	4,068	3,850
Collateralized Loan Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, AFS	3,250	3,090
CMBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, AFS	2,736	3,125
Corporate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, AFS	20,636	17,866
Residential mortgage-backed securities ("RMBS")
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, AFS	5,230	4,287
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, AFS	2,610	2,237
Short-term investments	98	25
Significant Unobservable Inputs (Level 3) | Collateralized Loan Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, AFS	116	113
Significant Unobservable Inputs (Level 3) | CMBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, AFS	167	227
Significant Unobservable Inputs (Level 3) | Corporate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, AFS	2,281	1,861
Significant Unobservable Inputs (Level 3) | Residential mortgage-backed securities ("RMBS")
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, AFS	24	36
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Collateralized Loan Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, AFS		$ 98
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Collateralized Loan Obligations [Member] | Minimum | Measurement Input, Credit Spread [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input		2.68
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Collateralized Loan Obligations [Member] | Maximum | Measurement Input, Credit Spread [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input		2.70
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Collateralized Loan Obligations [Member] | Weighted Average Expected Life | Measurement Input, Credit Spread [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input		2.69
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | CMBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, AFS	$ 166	$ 226
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | CMBS | Minimum | Measurement Input, Credit Spread [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input	2	3.65
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | CMBS | Maximum | Measurement Input, Credit Spread [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input	12.21	13.15
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | CMBS | Weighted Average Expected Life | Measurement Input, Credit Spread [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input	4.18	5.09
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Corporate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, AFS	$ 2,166	$ 1,741
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Corporate | Minimum | Measurement Input, Credit Spread [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input	0.81	0.49
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Corporate | Maximum | Measurement Input, Credit Spread [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input	7.94	7.43
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Corporate | Weighted Average Expected Life | Measurement Input, Credit Spread [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input	2.86	3.23
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Residential mortgage-backed securities ("RMBS")
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, AFS	$ 19	$ 36
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Residential mortgage-backed securities ("RMBS") | Minimum | Measurement Input, Credit Spread [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input	1	0.32
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Residential mortgage-backed securities ("RMBS") | Minimum | Measurement Input, Constant Prepayment Rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input	0.01	0.01
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Residential mortgage-backed securities ("RMBS") | Minimum | Measurement Input, Default Rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input	0.01	0.01
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Residential mortgage-backed securities ("RMBS") | Minimum | Measurement Input, Loss Severity [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input	0.30	0.10
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Residential mortgage-backed securities ("RMBS") | Maximum | Measurement Input, Credit Spread [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input	3.72	2.98
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Residential mortgage-backed securities ("RMBS") | Maximum | Measurement Input, Constant Prepayment Rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input	0.06	0.05
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Residential mortgage-backed securities ("RMBS") | Maximum | Measurement Input, Default Rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input	0.04	0.05
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Residential mortgage-backed securities ("RMBS") | Maximum | Measurement Input, Loss Severity [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input	0.50	0.70
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Residential mortgage-backed securities ("RMBS") | Weighted Average Expected Life | Measurement Input, Credit Spread [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input	1.81	1.61
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Residential mortgage-backed securities ("RMBS") | Weighted Average Expected Life | Measurement Input, Constant Prepayment Rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input	0.04	0.04
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Residential mortgage-backed securities ("RMBS") | Weighted Average Expected Life | Measurement Input, Default Rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input	0.02	0.02
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Residential mortgage-backed securities ("RMBS") | Weighted Average Expected Life | Measurement Input, Loss Severity [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input	0.41	0.41
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Short-term Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	$ 98	$ 15
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Short-term Investments [Member] | Minimum | Measurement Input, Credit Spread [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Measurement Input	2.66	5.79
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Short-term Investments [Member] | Maximum | Measurement Input, Credit Spread [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Measurement Input	2.66	12.54
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Short-term Investments [Member] | Weighted Average Expected Life | Measurement Input, Credit Spread [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Measurement Input	2.66	12.25

Fair Value Measurements - Sig_2

Fair Value Measurements - Significant Unobservable Inputs - Freestanding Derivatives (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Fair Value Inputs and Valuation Techniques
Adjustment Resulting from Broker Prices Received	$ 0
Significant Unobservable Inputs (Level 3)
Fair Value Inputs and Valuation Techniques
Derivative Assets (Liabilities), at Fair Value, Net	$ 1	$ 1

Fair Value Measurements - Fai_2

Fair Value Measurements - Fair Value Recurring Basis, Unobservable Input (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Assets
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration]	Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Net realized losses	Net realized losses
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Assets
Beginning balance	$ 2,487	$ 2,483
Total realized/unrealized gains (losses), Included in net income	(10)	(9)
Total realized/unrealized gains (losses), Included in OCI	(5)	74
Purchases	2,201	737
Settlements	(514)	(521)
Sales	(196)	(16)
Transfers into Level 3	48	71
Transfers out of Level 3	(1,019)	(332)
Ending balance	2,992	2,487
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Equity Securities [Member]
Assets
Beginning balance	58	61
Total realized/unrealized gains (losses), Included in net income	3	(1)
Total realized/unrealized gains (losses), Included in OCI	0	0
Purchases	49	1
Settlements	(20)	(3)
Sales	(3)	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Ending balance	87	58
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Short-term Investments [Member]
Assets
Beginning balance	25	193
Total realized/unrealized gains (losses), Included in net income	0	0
Total realized/unrealized gains (losses), Included in OCI	0	0
Purchases	145	48
Settlements	(72)	(216)
Sales	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Ending balance	98	25
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Securities available-for-sale and other | Total fixed maturities
Assets
Beginning balance	2,237	2,051
Total realized/unrealized gains (losses), Included in net income	(6)	(7)
Total realized/unrealized gains (losses), Included in OCI	(5)	74
Purchases	1,955	688
Settlements	(407)	(292)
Sales	(193)	(16)
Transfers into Level 3	48	71
Transfers out of Level 3	(1,019)	(332)
Ending balance	2,610	2,237
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Fair Value Option, Other Eligible Items | Total fixed maturities
Assets
Beginning balance	167
Total realized/unrealized gains (losses), Included in net income	(7)
Total realized/unrealized gains (losses), Included in OCI	0
Purchases	52
Settlements	(15)
Sales	0
Transfers into Level 3	0
Transfers out of Level 3	0
Ending balance	197	167
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | ABS | Securities available-for-sale and other | Total fixed maturities
Assets
Beginning balance	0	30
Total realized/unrealized gains (losses), Included in net income	0	0
Total realized/unrealized gains (losses), Included in OCI	0	0
Purchases	70	82
Settlements	0	0
Sales	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	(48)	(112)
Ending balance	22	0
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Collateralized Loan Obligations [Member] | Securities available-for-sale and other | Total fixed maturities
Assets
Beginning balance	113	115
Total realized/unrealized gains (losses), Included in net income	0	0
Total realized/unrealized gains (losses), Included in OCI	0	0
Purchases	919	102
Settlements	(64)	(49)
Sales	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	(852)	(55)
Ending balance	116	113
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Collateralized Loan Obligations [Member] | Fair Value Option, Other Eligible Items | Total fixed maturities
Assets
Beginning balance	167	178
Total realized/unrealized gains (losses), Included in net income		(1)
Total realized/unrealized gains (losses), Included in OCI		0
Purchases		0
Settlements		(10)
Sales		0
Transfers into Level 3		0
Transfers out of Level 3		0
Ending balance		167
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | CMBS | Securities available-for-sale and other | Total fixed maturities
Assets
Beginning balance	227	222
Total realized/unrealized gains (losses), Included in net income	(6)	(2)
Total realized/unrealized gains (losses), Included in OCI	18	3
Purchases	0	6
Settlements	(10)	(18)
Sales	(67)	(5)
Transfers into Level 3	39	21
Transfers out of Level 3	(34)	0
Ending balance	167	227
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Corporate | Securities available-for-sale and other | Total fixed maturities
Assets
Beginning balance	1,861	1,589
Total realized/unrealized gains (losses), Included in net income	0	(5)
Total realized/unrealized gains (losses), Included in OCI	(23)	71
Purchases	876	458
Settlements	(316)	(196)
Sales	(126)	(11)
Transfers into Level 3	9	50
Transfers out of Level 3	0	(95)
Ending balance	2,281	1,861
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Residential mortgage-backed securities ("RMBS") | Securities available-for-sale and other | Total fixed maturities
Assets
Beginning balance	36	95
Total realized/unrealized gains (losses), Included in net income	0	0
Total realized/unrealized gains (losses), Included in OCI	0	0
Purchases	90	40
Settlements	(17)	(29)
Sales	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	(85)	(70)
Ending balance	$ 24	$ 36

Fair Value Measurements - Chang

Fair Value Measurements - Changes in Unrealized Gains (Losses) Included in Net Income for Financial Instruments Classified as Level 3 Still Held at Year End (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Net realized losses	Net realized losses
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	$ (7)	$ (8)
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring [Member] | Equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	0	(1)
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring [Member] | Other Comprehensive Income (Loss) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	(16)	74
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring [Member] | Other Comprehensive Income (Loss) [Member] | Equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	0	0
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring [Member] | Securities available-for-sale and other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	0	(6)
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring [Member] | Securities available-for-sale and other | Other Comprehensive Income (Loss) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	(16)	74
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring [Member] | Collateralized Loan Obligations [Member] | Securities available-for-sale and other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	0	0
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring [Member] | Collateralized Loan Obligations [Member] | Securities available-for-sale and other | Other Comprehensive Income (Loss) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	0	1
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring [Member] | Collateralized Loan Obligations [Member] | Fair Value Option, Other Eligible Items
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	(7)	(1)
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring [Member] | Collateralized Loan Obligations [Member] | Fair Value Option, Other Eligible Items | Other Comprehensive Income (Loss) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	0	0
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring [Member] | CMBS | Securities available-for-sale and other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	0	0
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring [Member] | CMBS | Securities available-for-sale and other | Other Comprehensive Income (Loss) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	10	2
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring [Member] | Corporate | Securities available-for-sale and other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	0	(6)
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring [Member] | Corporate | Securities available-for-sale and other | Other Comprehensive Income (Loss) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	$ (26)	$ 71

Fair Value Measurements - Fai_3

Fair Value Measurements - Fair Value Option (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Option, Quantitative Disclosures [Line Items]
Fixed maturities, at fair value using the fair value option ("FVO Securities")	$ 308	$ 327
Changes in fair value of assets using fair value option	(5)	5	$ (28)
Fair Value, Option Residual Interest of Securitizations	$ 197
Collateralized Loan Obligations [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Fixed maturities, at fair value using the fair value option ("FVO Securities")		327
Fair Value, Option Residual Interest of Securitizations		$ 167

Fair Value Measurements - Finan

Fair Value Measurements - Financial Instruments Not Carried at Fair Value (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financing Receivable, after Allowance for Credit Loss	$ 6,396	$ 6,087
Policyholder Account Balance	614	638	$ 658
Commercial Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financing Receivable, after Allowance for Credit Loss	6,396	6,087
Financing Receivable, Allowance for Credit Loss	44	51	$ 36	$ 29
Significant Unobservable Inputs (Level 3) | Carrying Amount [1]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financing Receivable, after Allowance for Credit Loss	6,396	6,087
Policyholder Account Balance	614	638
Significant Unobservable Inputs (Level 3) | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financing Receivable, after Allowance for Credit Loss	5,901	5,584
Policyholder Account Balance	614	639
Significant Observable Inputs (Level 2) | Carrying Amount [1]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior Notes and Debentures	3,867	3,863
Junior Subordinated Debentures	499	499
Significant Observable Inputs (Level 2) | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior Notes and Debentures	3,406	3,533
Junior Subordinated Debentures	$ 460	$ 429

Investments - Net Investment In

Investments - Net Investment Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Net Investment Income [Line Items]
Gross investment income	$ 2,667	$ 2,396	$ 2,257
Investment expenses	(99)	(91)	(80)
Total net investment income	2,568	2,305	2,177
Total fixed maturities
Net Investment Income [Line Items]
Gross investment income	2,204	1,895	1,469
Equity securities
Net Investment Income [Line Items]
Gross investment income	35	45	57
Mortgage loans
Net Investment Income [Line Items]
Gross investment income	266	235	211
Limited partnerships and other alternative investments
Net Investment Income [Line Items]
Gross investment income	148	212	515
Other investments
Net Investment Income [Line Items]
Gross investment income	$ 14	$ 9	$ 5

Investments - Net Realized Capi

Investments - Net Realized Capital Gains (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule of Investments [Line Items]
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Sell before Recovery	$ 0	$ 0	$ (3)
Other, net	32	(118)	11
Total net realized capital gains (losses)	(61)	(188)	(627)
Translation Adjustment Functional to Reporting Currency, Increase (Decrease), Gross of Tax	$ 20	$ (15)	28
Investment, Type [Extensible Enumeration]	Equity Securities [Member]	Equity Securities [Member]
Transfer to Investments	$ 18	$ 80
Non-qualifying
Schedule of Investments [Line Items]
Derivative, Gain (Loss) on Derivative, Net	13	(108)	46
Realized Investment Gains Losses
Schedule of Investments [Line Items]
Equity Securities, FV-NI, Unrealized Gain (Loss)	68	17	(108)
Total fixed maturities
Schedule of Investments [Line Items]
Debt Securities, Available-for-Sale, Realized Gain	31	30	57
Debt Securities, Available-for-sale, Realized Loss	(198)	(149)	(315)
Debt Securities, Available-for-sale, Allowance for Credit Loss, Period Increase (Decrease)	(2)	(14)	(18)
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Sell before Recovery	0	0	6
Equity Securities [Member]
Schedule of Investments [Line Items]
Equity Securities, FV-NI, Realized Gain (Loss)	(11)	100	(83)
Equity Securities, FV-NI, Unrealized Gain (Loss)	84	(22)	(266)
Debt and Equity Securities, Gain (Loss)	73	78	(349)
Mortgage loans
Schedule of Investments [Line Items]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	$ 3	$ (15)	$ (7)

Investments - Accrued Interest

Investments - Accrued Interest Receivable on Fixed Maturities, AFS and Mortgage Loans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule of Investments [Line Items]
Proceeds from Sale of Debt Securities, Available-for-sale	$ 10,808	$ 6,806	$ 14,996
Transfer to Investments	18	80
Fixed maturities
Schedule of Investments [Line Items]
Proceeds from Sale of Debt Securities, Available-for-sale	5,700	3,800	$ 11,400
Fixed maturities
Schedule of Investments [Line Items]
Interest Receivable	412	371
Mortgage loans
Schedule of Investments [Line Items]
Interest Receivable	$ 22	$ 20

Investments - Investments - ACL

Investments - Investments - ACL on Fixed Maturities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Beginning Balance	$ (21)	$ (12)	$ (1)
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not Previously Recorded	1	9	20
Debt Securities, Available-for-sale, Allowance for Credit Loss, Securities Sold	(3)	(5)	(4)
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Sell before Recovery	0	0	(3)
Debt Securities, Available-for-sale, Allowance for Credit Loss, Period Increase (Decrease)	1	5	1
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Writeoff	4	0	3
Ending Balance	(16)	(21)	(12)
CMBS
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Beginning Balance	(12)	(10)	0
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not Previously Recorded	1	0	7
Debt Securities, Available-for-sale, Allowance for Credit Loss, Securities Sold	0	0	0
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Sell before Recovery	0	0	0
Debt Securities, Available-for-sale, Allowance for Credit Loss, Period Increase (Decrease)	0	2	3
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Writeoff	0	0	0
Ending Balance	(13)	(12)	(10)
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Beginning Balance	(9)	(2)	(1)
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not Previously Recorded	0	9	10
Debt Securities, Available-for-sale, Allowance for Credit Loss, Securities Sold	(3)	(5)	(3)
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Sell before Recovery	0	0	0
Debt Securities, Available-for-sale, Allowance for Credit Loss, Period Increase (Decrease)	1	3	(3)
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Writeoff	4	0	3
Ending Balance	(3)	(9)	(2)
Debt Security, Government, Non-US [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Beginning Balance	0	0	0
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not Previously Recorded			3
Debt Securities, Available-for-sale, Allowance for Credit Loss, Securities Sold			(1)
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Sell before Recovery			(3)
Debt Securities, Available-for-sale, Allowance for Credit Loss, Period Increase (Decrease)			1
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Writeoff			0
Ending Balance	$ 0	$ 0	$ 0

Investments - Available-for-Sal

Investments - Available-for-Sale Securities (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	$ 44,538	$ 41,726
Debt Securities, Available-for-sale, Allowance for Credit Loss	(16)	(21)	$ (12)	$ (1)
Gross Unrealized Gains, fixed maturities, available-for-sale	272	418
Gross Unrealized Losses, fixed maturities, available-for-sale	(2,227)	(2,305)
Total fixed maturities	42,567	39,818
Amortized Cost
One year or less	1,308	1,526
Over one year through five years	9,564	9,670
Over five years through ten years	7,687	6,568
Over ten years	10,208	9,370
Subtotal	28,767	27,134
Mortgage-backed and asset-backed securities	15,771	14,592
Fair Value
One year or less	1,298	1,501
Over one year through five years	9,414	9,433
Over five years through ten years	7,334	6,211
Over ten years	9,368	8,851
Subtotal	27,414	25,996
Mortgage-backed and asset-backed securities	15,153	13,822
ABS
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	3,948	3,347
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Gross Unrealized Gains, fixed maturities, available-for-sale	28	18
Gross Unrealized Losses, fixed maturities, available-for-sale	(39)	(45)
Total fixed maturities	3,937	3,320
Collateralized Loan Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	3,237	3,104
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Gross Unrealized Gains, fixed maturities, available-for-sale	13	3
Gross Unrealized Losses, fixed maturities, available-for-sale	0	(17)
Total fixed maturities	3,250	3,090
CMBS
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	2,976	3,466
Debt Securities, Available-for-sale, Allowance for Credit Loss	(13)	(12)	(10)	0
Gross Unrealized Gains, fixed maturities, available-for-sale	21	19
Gross Unrealized Losses, fixed maturities, available-for-sale	(248)	(348)
Total fixed maturities	2,736	3,125
Corporate
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	21,555	18,691
Debt Securities, Available-for-sale, Allowance for Credit Loss	(3)	(9)	(2)	(1)
Gross Unrealized Gains, fixed maturities, available-for-sale	117	197
Gross Unrealized Losses, fixed maturities, available-for-sale	(1,033)	(1,013)
Total fixed maturities	20,636	17,866
Foreign government/government agencies
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	500	583
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0	$ 0	$ 0
Gross Unrealized Gains, fixed maturities, available-for-sale	3	6
Gross Unrealized Losses, fixed maturities, available-for-sale	(23)	(27)
Total fixed maturities	480	562
Municipal
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	5,574	6,207
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Gross Unrealized Gains, fixed maturities, available-for-sale	77	131
Gross Unrealized Losses, fixed maturities, available-for-sale	(347)	(299)
Total fixed maturities	5,304	6,039
Residential mortgage-backed securities ("RMBS")
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	5,610	4,675
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Gross Unrealized Gains, fixed maturities, available-for-sale	13	18
Gross Unrealized Losses, fixed maturities, available-for-sale	(393)	(406)
Total fixed maturities	5,230	4,287
U.S. Treasuries
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	1,138	1,653
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Gross Unrealized Gains, fixed maturities, available-for-sale	0	26
Gross Unrealized Losses, fixed maturities, available-for-sale	(144)	(150)
Total fixed maturities	$ 994	$ 1,529

Investments - Concentration of

Investments - Concentration of Credit Risk (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Schedule of Investments [Line Items]
Fair Value, Concentration of Risk, Investments	$ 0	$ 0
Residential Mortgage Backed Securities [Member]
Schedule of Investments [Line Items]
Largest exposure by sector, percent of invested assets	9%	8%
Financial Services Sector [Member]
Schedule of Investments [Line Items]
Largest exposure by sector, percent of invested assets	11%	9%
Debt Security, Corporate, US | hig_Next Era Energy Inc
Schedule of Investments [Line Items]
Largest exposure by issuer, percent of invested assets (less than)	1%	1%
Debt Security, Corporate, US | Morgan Stanley
Schedule of Investments [Line Items]
Largest exposure by issuer, percent of invested assets (less than)	1%	1%
Municipal
Schedule of Investments [Line Items]
Largest exposure by sector, percent of invested assets	9%	11%
Debt Security, Government, Non-US [Member] | Government of Canada
Schedule of Investments [Line Items]
Largest exposure by issuer, percent of invested assets (less than)	1%	1%

Investments - Unrealized Losses

Investments - Unrealized Losses on AFS Securities (Details) $ in Millions	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	3,933
Percentage of Gross Unrealized Losses Depressed Less than Twenty Percent of Cost or Amortized Cost	94%
ABS
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 1,088	$ 604
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(14)	(6)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	407	1,043
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(25)	(39)
Debt Securities, Available-for-sale, Unrealized Loss Position	1,495	1,647
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(39)	(45)
Collateralized Loan Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	78	209
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	(1)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	2,249
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	(16)
Debt Securities, Available-for-sale, Unrealized Loss Position	78	2,458
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	0	(17)
CMBS
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	228	117
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(4)	(7)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	2,299	2,837
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(244)	(341)
Debt Securities, Available-for-sale, Unrealized Loss Position	2,527	2,954
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(248)	(348)
Corporate
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	5,883	810
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(138)	(10)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	8,212	11,149
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(895)	(1,003)
Debt Securities, Available-for-sale, Unrealized Loss Position	14,095	11,959
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(1,033)	(1,013)
Foreign government/government agencies
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	165	27
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(5)	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	178	368
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(18)	(27)
Debt Securities, Available-for-sale, Unrealized Loss Position	343	395
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(23)	(27)
Municipal
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	1,263	329
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(27)	(3)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	2,712	3,196
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(320)	(296)
Debt Securities, Available-for-sale, Unrealized Loss Position	3,975	3,525
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(347)	(299)
Residential mortgage-backed securities ("RMBS")
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	1,297	181
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(29)	(3)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	2,672	3,207
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(364)	(403)
Debt Securities, Available-for-sale, Unrealized Loss Position	3,969	3,388
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(393)	(406)
U.S. Treasuries
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	406	120
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(26)	(11)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	461	1,121
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(118)	(139)
Debt Securities, Available-for-sale, Unrealized Loss Position	867	1,241
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(144)	(150)
Securities available-for-sale and other
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	10,408	2,397
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(243)	(41)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	16,941	25,170
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(1,984)	(2,264)
Debt Securities, Available-for-sale, Unrealized Loss Position	27,349	27,567
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ (2,227)	$ (2,305)

Investments - Mortgage Loans- A

Investments - Mortgage Loans- ACL (Details) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans serviced on behalf of third parties	$ 4,800	$ 4,400
Financing Receivable, Modifications, Number of Contracts	1	0
Commercial Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	$ 44	$ 51	$ 36	$ 29
Financing Receivable, Credit Loss, Expense (Reversal)	(3)	15	7
Financing Receivable, Allowance for Credit Loss, Writeoff	$ (4)	$ 0	$ 0
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage	1%
Commercial Loan [Member] | Extended Maturity
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Modified in Period, Amount	$ 9

Investments - Commercial Mortga

Investments - Commercial Mortgage Loans LTV & DSCR (Details) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Schedule of Investments [Line Items]
Number of loans held-for-sale	0	0
Financing Receivable, Modifications, Number of Contracts	1	0
LTV ratio	56%
LTV ratio at origination	59%
Commercial Loan [Member]
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	2.47	2.60
Financing Receivable, before Allowance for Credit Loss	$ 6,440	$ 6,138
Financing Receivable, Allowance for Credit Loss	$ 44	$ 51	$ 36	$ 29
Commercial Loan [Member] | LTV Greater Than 80 Percent
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	1.34	1.29
Commercial Loan [Member] | 65% - 80%
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	2.26	2.25
Commercial Loan [Member] | Less than 65%
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	2.57	2.72
Amortized Cost [Member] | Commercial Loan [Member]
Schedule of Investments [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 471	$ 400
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	496	929
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	916	1,600
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,566	622
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	618	777
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,373	1,810
Financing Receivable, before Allowance for Credit Loss	6,440	6,138
Amortized Cost [Member] | Commercial Loan [Member] | LTV Greater Than 80 Percent
Schedule of Investments [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	25	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	16
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	16	38
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	37	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	110	105
Financing Receivable, before Allowance for Credit Loss	188	159
Amortized Cost [Member] | Commercial Loan [Member] | 65% - 80%
Schedule of Investments [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	89	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	7	189
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	204	457
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	421	95
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	100	98
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	439	252
Financing Receivable, before Allowance for Credit Loss	1,260	1,091
Amortized Cost [Member] | Commercial Loan [Member] | Less than 65%
Schedule of Investments [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	357	400
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	489	724
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	696	1,105
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,108	527
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	518	679
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,824	1,453
Financing Receivable, before Allowance for Credit Loss	$ 4,992	$ 4,888
Originated in Current Fiscal Year [Member] | Commercial Loan [Member]
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	1.52	1.47
Originated in Current Fiscal Year [Member] | Commercial Loan [Member] | LTV Greater Than 80 Percent
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	0.63	0
Originated in Current Fiscal Year [Member] | Commercial Loan [Member] | 65% - 80%
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	1.42	0
Originated in Current Fiscal Year [Member] | Commercial Loan [Member] | Less than 65%
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	1.62	1.47
Originated in Fiscal Year before Latest Fiscal Year [Member] | Commercial Loan [Member]
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	1.39	2.60
Originated in Fiscal Year before Latest Fiscal Year [Member] | Commercial Loan [Member] | LTV Greater Than 80 Percent
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	0	1.09
Originated in Fiscal Year before Latest Fiscal Year [Member] | Commercial Loan [Member] | 65% - 80%
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	1.35	2.13
Originated in Fiscal Year before Latest Fiscal Year [Member] | Commercial Loan [Member] | Less than 65%
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	1.39	2.75
Originated Two Years before Latest Fiscal Year [Member] | Commercial Loan [Member]
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	2.61	2.78
Originated Two Years before Latest Fiscal Year [Member] | Commercial Loan [Member] | LTV Greater Than 80 Percent
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	1.05	1.05
Originated Two Years before Latest Fiscal Year [Member] | Commercial Loan [Member] | 65% - 80%
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	1.89	2.42
Originated Two Years before Latest Fiscal Year [Member] | Commercial Loan [Member] | Less than 65%
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	2.85	2.99
Originated Three Years before Latest Fiscal Year [Member] | Commercial Loan [Member]
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	2.79	3
Originated Three Years before Latest Fiscal Year [Member] | Commercial Loan [Member] | LTV Greater Than 80 Percent
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	1.03	0
Originated Three Years before Latest Fiscal Year [Member] | Commercial Loan [Member] | 65% - 80%
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	2.55	3.47
Originated Three Years before Latest Fiscal Year [Member] | Commercial Loan [Member] | Less than 65%
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	2.93	2.92
Originated Four Years before Latest Fiscal Year [Member] | Commercial Loan [Member]
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	2.82	2.76
Originated Four Years before Latest Fiscal Year [Member] | Commercial Loan [Member] | LTV Greater Than 80 Percent
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	0	0
Originated Four Years before Latest Fiscal Year [Member] | Commercial Loan [Member] | 65% - 80%
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	3.60	1.77
Originated Four Years before Latest Fiscal Year [Member] | Commercial Loan [Member] | Less than 65%
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	2.67	2.90
Originated Five or More Years before Latest Fiscal Year [Member] | Commercial Loan [Member]
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	2.53	2.47
Originated Five or More Years before Latest Fiscal Year [Member] | Commercial Loan [Member] | LTV Greater Than 80 Percent
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	1.68	1.41
Originated Five or More Years before Latest Fiscal Year [Member] | Commercial Loan [Member] | 65% - 80%
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	2.01	1.77
Originated Five or More Years before Latest Fiscal Year [Member] | Commercial Loan [Member] | Less than 65%
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	2.71	2.67

Investments - Mortgage Loans by

Investments - Mortgage Loans by Region and Property Type (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, after Allowance for Credit Loss	$ 6,396	$ 6,087
Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 6,440	$ 6,138
Percent of Total	100%	100%
Financing Receivable, Allowance for Credit Loss	$ 44	$ 51	$ 36	$ 29
Financing Receivable, after Allowance for Credit Loss	6,396	6,087
Commercial Loan [Member] | Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 2,737	$ 2,363
Percent of Total	42.50%	38.50%
Commercial Loan [Member] | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 2,161	$ 2,200
Percent of Total	33.50%	35.90%
Commercial Loan [Member] | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 507	$ 578
Percent of Total	7.90%	9.40%
Commercial Loan [Member] | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 957	$ 917
Percent of Total	14.90%	14.90%
Commercial Loan [Member] | Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 78	$ 80
Percent of Total	1.20%	1.30%
Commercial Loan [Member] | Regional Shopping Malls
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 0	$ 0
Commercial Loan [Member] | Mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percent of Total	100%	100%
Commercial Loan [Member] | East North Central
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 362	$ 368
Commercial Loan [Member] | East North Central | Mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percent of Total	5.60%	6%
Commercial Loan [Member] | Middle Atlantic
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 259	$ 238
Commercial Loan [Member] | Middle Atlantic | Mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percent of Total	4%	3.90%
Commercial Loan [Member] | Mountain
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 764	$ 699
Commercial Loan [Member] | Mountain | Mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percent of Total	11.90%	11.40%
Commercial Loan [Member] | New England
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 356	$ 351
Commercial Loan [Member] | New England | Mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percent of Total	5.50%	5.70%
Commercial Loan [Member] | Pacific
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 1,400	$ 1,326
Commercial Loan [Member] | Pacific | Mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percent of Total	21.80%	21.60%
Commercial Loan [Member] | South Atlantic
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 1,821	$ 1,776
Commercial Loan [Member] | South Atlantic | Mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percent of Total	28.30%	28.90%
Commercial Loan [Member] | West North Central
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 97	$ 103
Commercial Loan [Member] | West North Central | Mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percent of Total	1.50%	1.70%
Commercial Loan [Member] | West South Central
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 588	$ 445
Commercial Loan [Member] | West South Central | Mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percent of Total	9.10%	7.20%
Commercial Loan [Member] | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 793	$ 832
Commercial Loan [Member] | Other | Mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percent of Total	12.30%	13.60%

Investments - Past-Due Mortgage

Investments - Past-Due Mortgage Loans (Details) - Commercial Loan [Member] - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 6,440	$ 6,138
Financial Asset, Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 0	$ 0

Investments - Investments - Mor

Investments - Investments - Mortgage Servicing (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Condensed Balance Sheet Statements, Captions [Line Items]
Continuing Involvement with Transferred Financial Assets, Principal Amount Outstanding	$ 10,000	$ 9,400
Loans serviced on behalf of third parties	4,800	4,400
Servicing rights	0	0
Investments [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Loans serviced on behalf of third parties, retained and reported as assets	$ 5,200	$ 5,000

Investments - Variable Interest

Investments - Variable Interest Entities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule of Investments [Line Items]
Variable Interest Entity, Primary Beneficiary, Maximum Loss Exposure, Amount	$ 0	$ 0
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	3,200	3,000
Investment Program, Proportional Amortization Method, Applied, Amortization Expense	2	1	$ 0
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization Expense	8	1	$ 0
Other Assets	1,981	1,754
Investment Program, Proportional Amortization Method, Elected, Commitment	267	180
Transfer of Financial Assets Accounted for as Sales, Amount Derecognized	86
Securitization or Asset-Backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale, Gain (Loss) on Sale	1
Variable Interest Entity, Not Primary Beneficiary [Member]
Schedule of Investments [Line Items]
Other Assets	51	20
Collateralized Loan Obligations [Member] | Securities available-for-sale and other
Schedule of Investments [Line Items]
Variable Interest Entity, Reporting Entity Involvement, Commitments	426
Transfers of Financial Assets Accounted for as Sale, Initial Fair Value of Assets Obtained as Proceeds	24
Collateralized Loan Obligations [Member] | Fair Value Option, Other Eligible Items
Schedule of Investments [Line Items]
Transfers of Financial Assets Accounted for as Sale, Initial Fair Value of Assets Obtained as Proceeds	50
Variable Interest Entity, Not Primary Beneficiary [Member]
Schedule of Investments [Line Items]
Variable Interest Entity, Reporting Entity Involvement, Commitments	$ 2,000	$ 1,700

Investments - Reverse Repurchas

Investments - Reverse Repurchase Agreements and Other Collateral Transactions (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Schedule of Investments [Line Items]
Securities for Reverse Repurchase Agreements	$ 0	$ 10
US Treasury Securities [Member]
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Restricted	$ 1	$ 7

Investments - Restricted Invest

Investments - Restricted Investments (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Security Owned Not Readily Marketable [Line Items]
Assets Held by Insurance Regulators	$ 2,362	$ 2,339
Restricted Investments	3,504	3,488
Fair Value Measured at Net Asset Value Per Share [Member]
Security Owned Not Readily Marketable [Line Items]
Deposit Assets	61	75
Syndicate Policyholders [Member] | Fixed maturities
Security Owned Not Readily Marketable [Line Items]
Debt Securities, Available-for-sale, Restricted	1,056	890
Syndicate Policyholders [Member] | Short-term Investments [Member]
Security Owned Not Readily Marketable [Line Items]
Restricted Investments, Current	25	30
Lloyd's of London [Member] | Fixed maturities
Security Owned Not Readily Marketable [Line Items]
Debt Securities, Available-for-sale, Restricted	$ 0	$ 154

Investments - Equity Method Inv

Investments - Equity Method Investments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule of Investments [Line Items]
Equity method investments	$ 4,552	$ 4,328
Commitments to fund limited partnership and alternative investments	$ 2,100
Aggregate investment income from limited partnerships and other alternative investments	10%	10%	10%
Total assets	$ 80,917	$ 76,780
Total liabilities	64,470	61,453
Total net investment income	2,568	2,305	$ 2,177
Net income (loss)	3,111	2,504	1,819
Income (Loss) from Equity Method Investments	103	181	533
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] | Limited Partner [Member]
Schedule of Investments [Line Items]
Total assets	356,430	308,259
Total liabilities	57,017	44,950
Total net investment income	(1,002)	(1,240)	1,604
Net income (loss)	$ 14,778	$ 13,000	$ 11,885

Derivatives - Derivative Balanc

Derivatives - Derivative Balance Sheet Classification (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 7,081	$ 12,363
Fair Value	45	7
Asset Derivatives	88	57
Liability Derivatives	(43)	(50)
Securities available-for-sale and other
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	647	645
Fair Value	0	0
Asset Derivatives	0	0
Liability Derivatives	0	0
Other investments
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	3,011	1,662
Fair Value	57	(1)
Asset Derivatives	66	18
Liability Derivatives	(9)	(19)
Other liabilities
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	3,423	10,056
Fair Value	(12)	8
Asset Derivatives	22	39
Liability Derivatives	(34)	(31)
Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	2,210	8,269
Fair Value	4	(5)
Asset Derivatives	36	27
Liability Derivatives	(32)	(32)
Interest rate swaps | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	4,225	3,450
Fair Value	0	(1)
Asset Derivatives	0	1
Liability Derivatives	0	(2)
Interest rate swaps | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	344	6,600
Foreign currency swaps | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	646	644
Fair Value	41	13
Asset Derivatives	52	29
Liability Derivatives	(11)	(16)
Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	4,871	4,094
Fair Value	41	12
Asset Derivatives	52	30
Liability Derivatives	(11)	(18)
Interest rate swaps and futures | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	344	6,626
Fair Value	0	(5)
Asset Derivatives	1	0
Liability Derivatives	(1)	(5)
Foreign currency swaps and forwards | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	647	645
Fair Value	0	0
Asset Derivatives	0	0
Liability Derivatives	0	0
Credit derivatives in offsetting positions | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	986	998
Fair Value	0	0
Asset Derivatives	31	27
Liability Derivatives	(31)	(27)
Equity index options | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	233	0
Fair Value	4	0
Asset Derivatives	4	0
Liability Derivatives	$ 0	$ 0

Derivatives - Offsetting Deriva

Derivatives - Offsetting Derivative Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Derivative [Line Items]
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other investments	Other investments
Asset Derivatives	$ 88	$ 57
Derivative assets	57	(1)
Gross Amounts of Recognized (Liabilities)	(43)	(50)
Derivative liabilities	(12)	8
Derivative Liabilities
Derivative [Line Items]
Derivative, Collateral, Obligation to Return Cash	11	(22)
Gross Amounts of Recognized (Liabilities)	(43)	(50)
Gross Amounts Offset in the Statement of Financial Position, liabilities	(42)	(36)
Derivative liabilities	(12)	8
Financial Collateral (Received)	(1)	(13)
Net amount, liabilities	0	(1)
Derivative Assets
Derivative [Line Items]
Asset Derivatives	88	57
Gross Amounts Offset in the Statement of Financial Position, assets	86	55
Derivative assets	57	(1)
Derivative, Collateral, Obligation to Return Cash	(55)	3
Financial Collateral Pledged	0	0
Net Amount, assets	$ 2	$ 2

Derivatives - Cash Flow Hedges

Derivatives - Cash Flow Hedges (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net realized losses	$ (61)	$ (188)	$ (627)
Net investment income	2,568	2,305	2,177
Interest Expense	199	199	213
Cash Flow Hedging | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	27	(25)	56
Cash Flow Hedging | Designated as Hedging Instrument | Foreign currency swaps | Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain Reclassified from AOCI into Income	(13)	(16)	15
Cash Flow Hedging | Designated as Hedging Instrument | Interest Expense [Member] | Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain Reclassified from AOCI into Income	16	15	(2)
Interest rate swaps | Reclassification out of Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net investment income	(25)	(26)	6
Interest Expense	16	15	(2)
Interest rate swaps | Cash Flow Hedging | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	(14)	6	0
Interest rate swaps | Cash Flow Hedging | Designated as Hedging Instrument | Foreign currency swaps | Reclassification out of Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain Reclassified from AOCI into Income	(25)	(26)	6
Interest rate swaps | Cash Flow Hedging | Designated as Hedging Instrument | Interest Expense [Member] | Reclassification out of Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain Reclassified from AOCI into Income	16	15	(2)
Foreign currency swaps | Reclassification out of Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net investment income	12	10	9
Foreign currency swaps | Cash Flow Hedging | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	41	(31)	56
Foreign currency swaps | Cash Flow Hedging | Designated as Hedging Instrument | Foreign currency swaps | Reclassification out of Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain Reclassified from AOCI into Income	12	10	9
Foreign currency swaps | Cash Flow Hedging | Designated as Hedging Instrument | Interest Expense [Member] | Reclassification out of Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain Reclassified from AOCI into Income	$ 0	$ 0	$ 0

Derivatives - Fair Value Hedges

Derivatives - Fair Value Hedges - Non-qualifying Strategies (Details) - Not Designated as Hedging Instrument - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ 13	$ (108)	$ 46
Foreign Exchange Forward [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	0	0	5
Interest rate swaps and futures
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	8	(3)	25
Credit derivatives | Credit derivatives that purchase credit protection
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	0	(105)	4
Equity index options
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	5	0	(2)
Commodity Option
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ 0	$ 0	$ 14

Derivatives - Credit Risk Assum

Derivatives - Credit Risk Assumed through Credit Derivatives (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Credit Derivatives [Line Items]
Derivative, Notional Amount	$ 7,081	$ 12,363
Fair Value	45	7
Credit derivatives
Credit Derivatives [Line Items]
Derivative, Notional Amount	493	499
Fair Value	29	22
Offsetting Notional Amount	493	499
Offsetting Fair Value	(29)	(22)
Standard & Poor's, AAA Rating [Member] | Basket credit default swaps | Credit derivatives | Investment grade risk exposure
Credit Derivatives [Line Items]
Derivative, Notional Amount	100	101
Fair Value	$ 0	$ (1)
Weighted Average Years to Maturity	4 years	5 years
Offsetting Notional Amount	$ 100	$ 101
Offsetting Fair Value	0	1
B Plus | Basket credit default swaps | Credit derivatives | Below investment grade risk exposure
Credit Derivatives [Line Items]
Derivative, Notional Amount	392	396
Fair Value	$ 30	$ 24
Weighted Average Years to Maturity	3 years	4 years
Offsetting Notional Amount	$ 392	$ 396
Offsetting Fair Value	(30)	(24)
CCC Minus | Basket credit default swaps | Credit derivatives | Below investment grade risk exposure
Credit Derivatives [Line Items]
Derivative, Notional Amount		2
Fair Value		$ (1)
Average Term of Credit Risk Derivatives Less than 1 Year		Less than 1 year
Offsetting Notional Amount		$ 2
Offsetting Fair Value		$ 1
Standard & Poor's, CCC Rating | Basket credit default swaps | Credit derivatives | Below investment grade risk exposure
Credit Derivatives [Line Items]
Derivative, Notional Amount	1
Fair Value	$ (1)
Average Term of Credit Risk Derivatives Less than 1 Year	Less than 1 year
Offsetting Notional Amount	$ 1
Offsetting Fair Value	$ 1

Derivatives - Additional Inform

Derivatives - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	$ 7,081	$ 12,363
Derivative, Collateral, Right to Reclaim Cash	31	25
Cash collateral held	78	49
Securities collateral held or repledged		0
Collateral Pledged
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Collateral, Right to Reclaim Cash	10	16
Asset Pledged as Collateral
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Security Not Offset	1	14
Asset Pledged as Collateral | Over the Counter [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Security Not Offset	103	112
Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net reclassifications from AOCI to earnings resulting from the discontinuance of cash-flow hedges due to forecasted transactions that were no longer probable of occurring	0	0	$ 0
Accumulated Other Comprehensive Income (Loss) ("AOCI"), net of tax
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Deferred net gains on derivative instruments recorded in AOCI that are expected to be reclassified to earnings during the next twelve months	40
Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	2,210	8,269
Interest rate swaps | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	344	6,600
SOFR Plus Two Point One Two Five Percent Plus Zero Point Two Six One Six One Percent Junior Subordinated Notes Due Two Thousand Sixty Seven
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Junior Subordinated Debentures	$ 500	$ 500

Premiums Receivable - Premiums

Premiums Receivable - Premiums Receivable and Agents' Balances (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Premiums Receivable, Gross	$ 6,115	$ 5,716
Premium Receivable, Allowance for Credit Loss	(117)	(109)	$ (109)	$ (105)
Premiums Receivable, Net	5,998	5,607
Premiums Receivable, Due in One Year or Less, Excluding Receivables for Loss within a Deductible and Retrospectively-Rated Policy Premiums [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Premiums Receivable, Gross	5,624	5,303
Premium Receivable, Allowance for Credit Loss	(97)	(89)	(85)	(83)
Premiums Receivable, Loss Within a Deductible and Retrospectively-Rated Policy Premiums [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Premiums Receivable, Gross	491	413
Premium Receivable, Allowance for Credit Loss	(20)	(20)	$ (24)	$ (22)
Premiums Receivable, Loss Within a Deductible and Retrospectively-Rated Policy Premiums [Member] | Standard & Poor's, AA Rating
Financing Receivable, Credit Quality Indicator [Line Items]
Premiums Receivable, Gross	97	94
Premiums Receivable, Loss Within a Deductible and Retrospectively-Rated Policy Premiums [Member] | Standard & Poor's, A Rating [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Premiums Receivable, Gross	57	54
Premiums Receivable, Loss Within a Deductible and Retrospectively-Rated Policy Premiums [Member] | Standard & Poor's, BBB Rating
Financing Receivable, Credit Quality Indicator [Line Items]
Premiums Receivable, Gross	193	136
Premiums Receivable, Loss Within a Deductible and Retrospectively-Rated Policy Premiums [Member] | Standard & Poor's, BB Rating
Financing Receivable, Credit Quality Indicator [Line Items]
Premiums Receivable, Gross	94	84
Premiums Receivable, Loss Within a Deductible and Retrospectively-Rated Policy Premiums [Member] | Standard & Poor's, Below BB Rating
Financing Receivable, Credit Quality Indicator [Line Items]
Premiums Receivable, Gross	$ 50	$ 45

Premiums Receivable - Rollforwa

Premiums Receivable - Rollforward of Premiums Receivable and Agents' Balances (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Line Items]
Premium Receivable, Allowance for Credit Loss	$ (109)	$ (109)	$ (105)
Premium Receivable, Credit Loss Expense (Reversal)	65	50	51
Premium Receivable, Allowance for Credit Loss, Writeoff	63	57	57
Premium Receivable, Allowance for Credit Loss, Recovery	(6)	(7)	(10)
Premium Receivable, Allowance for Credit Loss	(117)	(109)	(109)
Premiums Receivable, Due in One Year or Less, Excluding Receivables for Loss within a Deductible and Retrospectively-Rated Policy Premiums [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Premium Receivable, Allowance for Credit Loss	(89)	(85)	(83)
Premium Receivable, Credit Loss Expense (Reversal)	64	52	48
Premium Receivable, Allowance for Credit Loss, Writeoff	62	55	56
Premium Receivable, Allowance for Credit Loss, Recovery	(6)	(7)	(10)
Premium Receivable, Allowance for Credit Loss	(97)	(89)	(85)
Premiums Receivable, Loss Within a Deductible and Retrospectively-Rated Policy Premiums [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Premium Receivable, Allowance for Credit Loss	(20)	(24)	(22)
Premium Receivable, Credit Loss Expense (Reversal)	1	(2)	3
Premium Receivable, Allowance for Credit Loss, Writeoff	1	2	1
Premium Receivable, Allowance for Credit Loss, Recovery	0	0	0
Premium Receivable, Allowance for Credit Loss	$ (20)	$ (20)	$ (24)

Reinsurance - Additional Inform

Reinsurance - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group
Policyholder Benefits and Claims Incurred, Ceded	$ 300
Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group | Remaining [Member]
Reinsurance, Excess Retention, Amount Reinsured, Per Policy	0
Reinsurance Policy, Type [Axis]: Asbestos and Environmental | Asbestos and Environmental
Policyholder Benefits and Claims Incurred, Ceded	1,500
Reinsurance Policy, Type [Axis]: Asbestos and Environmental | Remaining [Member] | Asbestos and Environmental
Reinsurance, Excess Retention, Amount Reinsured, Per Policy	0
Property and Casualty Insurance Products
Policyholder Benefits and Claims Incurred, Ceded	1,241	$ 1,043	$ 1,338
Group Insurance Policy [Member]
Policyholder Benefits and Claims Incurred, Ceded	120	$ 93	$ 81
Maximum | Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group
Reinsurance, Excess Retention, Amount Reinsured, Per Policy	300
Maximum | Reinsurance Policy, Type [Axis]: Asbestos and Environmental | Asbestos and Environmental
Reinsurance, Excess Retention, Amount Reinsured, Per Policy	1,500
Maximum | The Navigators Group, Inc. [Member] | Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group
Reinsurance, Excess Retention, Amount Reinsured, Per Policy	$ 300

Reinsurance - Credit Quality In

Reinsurance - Credit Quality Information (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	$ 7,215	$ 7,207
Allowance for uncollectible reinsurance	(75)	(103)	$ (105)
Reinsurance Recoverables, Including Reinsurance Premium Paid	7,140	7,104
Mandatory and Voluntary Risk Pools
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	205	208
Captives
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	402	353
Other not rated companies
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	181	230
AMBestRated [Member]
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	6,427	6,416
AM Best, A++ Rating
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	2,271	2,398
AM Best, A+ Rating
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	2,674	2,522
AM Best, A Rating
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	830	811
AM Best, A- Rating
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	626	658
AM Best, B++ Rating
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	4	5
AM Best, Below B plus plus Rating
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	22	22
Corporate
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	226	244
Allowance for uncollectible reinsurance	(2)	(2)	(2)
Reinsurance Recoverables, Including Reinsurance Premium Paid	224	242
Corporate | Mandatory and Voluntary Risk Pools
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	0	0
Corporate | Captives
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	0	0
Corporate | Other not rated companies
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	0	0
Corporate | AMBestRated [Member]
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	226	244
Corporate | AM Best, A++ Rating
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	0	0
Corporate | AM Best, A+ Rating
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	224	241
Corporate | AM Best, A Rating
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	0	0
Corporate | AM Best, A- Rating
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	0	0
Corporate | AM Best, B++ Rating
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	2	3
Corporate | AM Best, Below B plus plus Rating
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	0	0
Property and Casualty Insurance Products | Operating Segments
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	6,698	6,702
Allowance for uncollectible reinsurance	(72)	(100)	(102)	$ (96)
Reinsurance Recoverables, Including Reinsurance Premium Paid	6,626	6,602
Property and Casualty Insurance Products | Operating Segments | Mandatory and Voluntary Risk Pools
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	205	208
Property and Casualty Insurance Products | Operating Segments | Captives
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	402	353
Property and Casualty Insurance Products | Operating Segments | Other not rated companies
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	176	226
Property and Casualty Insurance Products | Operating Segments | AMBestRated [Member]
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	5,915	5,915
Property and Casualty Insurance Products | Operating Segments | AM Best, A++ Rating
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	2,271	2,398
Property and Casualty Insurance Products | Operating Segments | AM Best, A+ Rating
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	2,169	2,030
Property and Casualty Insurance Products | Operating Segments | AM Best, A Rating
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	829	810
Property and Casualty Insurance Products | Operating Segments | AM Best, A- Rating
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	622	653
Property and Casualty Insurance Products | Operating Segments | AM Best, B++ Rating
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	2	2
Property and Casualty Insurance Products | Operating Segments | AM Best, Below B plus plus Rating
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	22	22
Group Insurance Policy [Member] | Operating Segments
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	291	261
Allowance for uncollectible reinsurance	(1)	(1)	$ (1)
Reinsurance Recoverables, Including Reinsurance Premium Paid	290	260
Group Insurance Policy [Member] | Operating Segments | Mandatory and Voluntary Risk Pools
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	0	0
Group Insurance Policy [Member] | Operating Segments | Captives
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	0	0
Group Insurance Policy [Member] | Operating Segments | Other not rated companies
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	5	4
Group Insurance Policy [Member] | Operating Segments | AMBestRated [Member]
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	286	257
Group Insurance Policy [Member] | Operating Segments | AM Best, A++ Rating
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	0	0
Group Insurance Policy [Member] | Operating Segments | AM Best, A+ Rating
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	281	251
Group Insurance Policy [Member] | Operating Segments | AM Best, A Rating
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	1	1
Group Insurance Policy [Member] | Operating Segments | AM Best, A- Rating
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	4	5
Group Insurance Policy [Member] | Operating Segments | AM Best, B++ Rating
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	0	0
Group Insurance Policy [Member] | Operating Segments | AM Best, Below B plus plus Rating
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	$ 0	$ 0

Reinsurance - Allowance for Cre

Reinsurance - Allowance for Credit Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reinsurance Recoverable, Past Due [Line Items]
Reinsurance Recoverable, Allowance for Credit Loss	$ 75	$ 103	$ 105
Operating Segments | Property and Casualty Insurance Subsidiaries
Reinsurance Recoverable, Past Due [Line Items]
Reinsurance Recoverable, Allowance for Credit Loss	72	100	102	$ 96
Reinsurance Recoverable, Credit Loss Expense (Reversal)	(6)	3	0
Reinsurance, Loss on Uncollectible Accounts in Period, Amount	(13)	(2)	0
Operating Segments | Property and Casualty Insurance Subsidiaries | Reinsurance Policy, Type [Axis]: Before Disputed Amounts [Member]
Reinsurance Recoverable, Past Due [Line Items]
Reinsurance Recoverable, Allowance for Credit Loss	24	43	42	42
Operating Segments | Property and Casualty Insurance Subsidiaries | Reinsurance Policy, Type [Axis]: Disputes [Member]
Reinsurance Recoverable, Past Due [Line Items]
Reinsurance Recoverable, Allowance for Credit Loss	48	57	60	$ 54
Operating Segments | Group Insurance Policy [Member]
Reinsurance Recoverable, Past Due [Line Items]
Reinsurance Recoverable, Allowance for Credit Loss	1	1	1
Corporate
Reinsurance Recoverable, Past Due [Line Items]
Reinsurance Recoverable, Allowance for Credit Loss	$ 2	$ 2	$ 2

Reinsurance - Insurance Revenue

Reinsurance - Insurance Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Premiums Earned
Direct	$ 23,491	$ 21,959	$ 20,316
Assumed	1,167	1,000	829
Ceded	(1,869)	(1,716)	(1,568)
Earned premiums and fee income	23,940	22,326	20,739
Premiums Earned, Net	22,567	21,026	19,390
Property and Casualty Insurance Products
Premiums Written
Direct	17,622	16,144	14,891
Assumed	1,102	975	718
Ceded	(1,775)	(1,642)	(1,490)
Net	16,949	15,477	14,119
Premiums Earned
Direct	16,915	15,514	14,328
Assumed	1,001	826	654
Ceded	(1,742)	(1,612)	(1,462)
Premiums Earned, Net	16,174	14,728	13,520
Group Insurance Policy [Member]
Premiums Earned
Assumed	166	174	175
Ceded	(127)	(104)	(106)
Earned premiums and fee income	6,615	6,515	6,057
Direct earned premiums, fee income and other considerations	$ 6,576	$ 6,445	$ 5,988

Goodwill & Other Intangible A_3

Goodwill & Other Intangible Assets - Goodwill Carrying Value (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Ending balance	$ 1,911,000,000	$ 1,911,000,000
Goodwill, Impairment Loss	0	0
Operating Segments | P&C Business Insurance [Member]
Goodwill [Roll Forward]
Ending balance	659,000,000	659,000,000
Operating Segments | P&C Personal Insurance [Member]
Goodwill [Roll Forward]
Ending balance	119,000,000	119,000,000
Operating Segments | Hartford Funds
Goodwill [Roll Forward]
Ending balance	180,000,000	180,000,000
Operating Segments | Employee Benefits [Member]
Goodwill [Roll Forward]
Ending balance	723,000,000	723,000,000
Corporate
Goodwill [Roll Forward]
Ending balance	230,000,000	230,000,000
Corporate | Hartford Funds
Goodwill [Roll Forward]
Ending balance	92,000,000	92,000,000
Corporate | Employee Benefits [Member]
Goodwill [Roll Forward]
Ending balance	$ 138,000,000	$ 138,000,000

Goodwill & Other Intangible A_4

Goodwill & Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Amortized Intangible Assets:
Finite-Lived Intangible Assets, Gross	$ 1,071	$ 1,071
Accumulated Amortization	(529)	(459)
Net Carrying Amount	542	612
Total Indefinite Life Intangible Assets	95	95
Total Other Intangible Assets	1,166	1,166
Total Other Intangible Assets	637	707
Customer relationships
Amortized Intangible Assets:
Finite-Lived Intangible Assets, Gross	636	636
Accumulated Amortization	(313)	(269)
Net Carrying Amount	323	367
Marketing agreement with Aetna
Amortized Intangible Assets:
Finite-Lived Intangible Assets, Gross	16	16
Accumulated Amortization	(7)	(7)
Net Carrying Amount	9	9
Distribution Agreement
Amortized Intangible Assets:
Finite-Lived Intangible Assets, Gross	79	79
Accumulated Amortization	(75)	(72)
Net Carrying Amount	4	7
Distribution and Agency relationships & Other
Amortized Intangible Assets:
Finite-Lived Intangible Assets, Gross	340	340
Accumulated Amortization	(134)	(111)
Net Carrying Amount	$ 206	$ 229

Goodwill & Other Intangible A_5

Goodwill & Other Intangible Assets - Expected Future Amortization Expense (Details) - Other Intangible Assets [Member] $ in Millions	Dec. 31, 2024 USD ($)
Finite-Lived Intangible Assets [Line Items]
2025	$ 71
2026	70
2027	68
2028	64
2029	$ 62

Reserve for Unpaid Losses and_3

Reserve for Unpaid Losses and Loss Adjustment Expenses - P&C Liabilities for Unpaid Losses and Loss Adjustment Expenses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Beginning liabilities for unpaid losses and loss adjustment expenses, gross	$ 42,318
Payments
Ending liabilities for unpaid losses and loss adjustment expenses, gross	44,610	$ 42,318
Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group
Provision for unpaid losses and loss adjustment expenses
Increase (Decrease) in Deferred Revenue	(145)	0	$ 0
Payments
Amortization of Deferred Gain on Retroactive Reinsurance	145
Property and Casualty Insurance Subsidiaries
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Beginning liabilities for unpaid losses and loss adjustment expenses, gross	34,044	33,083	31,449
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	6,753	6,696	6,465	$ 6,081
Beginning liabilities for unpaid losses and loss adjustment expenses, net	27,348	26,618	25,368
Provision for unpaid losses and loss adjustment expenses
Current Year Claims and Claims Adjustment Expense	10,305	9,538	8,577
Prior accident year development [1]	(120)	10	36
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims	10,185	9,548	8,613
Payments
Current accident year	(2,765)	(2,716)	(2,424)
Prior accident years	(5,175)	(5,926)	(4,678)
Total payments	(7,940)	(8,642)	(7,102)
Foreign currency adjustment	(25)	18	(32)
Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance	29,651	27,348	26,618	$ 25,368
Ending liabilities for unpaid losses and loss adjustment expenses, gross	36,404	34,044	33,083
Property and Casualty Insurance Subsidiaries | Reinsurance Policy, Type [Axis]: Adverse Development Covers
Provision for unpaid losses and loss adjustment expenses
Increase (Decrease) in Deferred Revenue	$ 83	$ (194)	$ (229)

Reserve for Unpaid Losses and_4

Reserve for Unpaid Losses and Loss Adjustment Expenses - Discounted Reserves, P&C (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Weighted Average Discount Rate [Line Items]
Short-Duration Insurance Contract, Discounted Liability, Interest Accretion, Statement of Financial Position [Extensible Enumeration]	Benefits, losses and loss adjustment expenses	Benefits, losses and loss adjustment expenses	Benefits, losses and loss adjustment expenses
Property and Casualty Insurance Products
Weighted Average Discount Rate [Line Items]
Liability for unpaid losses and loss adjustment expenses, at undiscounted amounts	$ 1,184	$ 1,255	$ 1,343
Amount of discount	333	339	347
Carrying value of liability for unpaid losses and loss adjustment expenses	851	916	996
Discount accretion included in losses and loss adjustment expenses	$ 44	$ 42	$ 36
Property and Casualty Insurance Products | Minimum
Weighted Average Discount Rate [Line Items]
Discount Rate	0.83%	0.83%	0.83%
Property and Casualty Insurance Products | Maximum
Weighted Average Discount Rate [Line Items]
Discount Rate	14.03%	14.03%	14.03%
Property and Casualty Insurance Products | Weighted Average Expected Life
Weighted Average Discount Rate [Line Items]
Discount Rate	2.80%	2.74%	2.71%

Reserve for Unpaid Losses and_5

Reserve for Unpaid Losses and Loss Adjustment Expenses - Prior Accident Years Reserve Development (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group
Prior accident years reserve development
Change in Deferred Gain on Retroactive Reinsurance	$ 145	$ 0	$ 0
Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group | Remaining [Member]
Prior accident years reserve development
Reinsurance, Excess Retention, Amount Reinsured, Per Policy	0
Asbestos and Environmental
Prior accident years reserve development
Change in Deferred Gain on Retroactive Reinsurance	62	194	229
Liability for Asbestos and Environmental Claims, Gross, Period Increase (Decrease)	203	194	229
Asbestos and Environmental | Reinsurance Policy, Type [Axis]: Asbestos and Environmental | Remaining [Member]
Prior accident years reserve development
Reinsurance, Excess Retention, Amount Reinsured, Per Policy	0
Net asbestos reserves
Prior accident years reserve development
Prior accident year development [1]	167	156	162
Net environmental reserves
Prior accident years reserve development
Prior accident year development [1]	36	38	67
Property and Casualty Insurance Products
Prior accident years reserve development
Prior accident year development [1]	(120)	10	36
Prior Year Claims and Claims Adjustment Expense, net of retroactive reinsurance benefit	(37)	(184)	(193)
Property and Casualty Insurance Products | Reinsurance Policy, Type [Axis]: Adverse Development Covers
Prior accident years reserve development
Change in Deferred Gain on Retroactive Reinsurance	(83)	194	229
Segment Reconciling Items
Prior accident years reserve development
Change in Deferred Gain on Retroactive Reinsurance	(83)	194	229
Segment Reconciling Items | Catastrophes
Prior accident years reserve development
Prior accident year development [1]	(87)	(87)	(62)
Segment Reconciling Items | Asbestos and Environmental
Prior accident years reserve development
Prior accident year development [1]	141	0	0
Segment Reconciling Items | Workers' Compensation
Prior accident years reserve development
Prior accident year development [1]	(258)	(236)	(204)
Segment Reconciling Items | Workers' Compensation | COVID-19 related Claims
Prior accident years reserve development
Prior accident year development [1]	(48)	(38)	(14)
Segment Reconciling Items | Workers’ compensation discount accretion
Prior accident years reserve development
Prior accident year development [1]	44	42	36
Segment Reconciling Items | General liability
Prior accident years reserve development
Prior accident year development [1]	211	41	56
Segment Reconciling Items | Marine [Member]
Prior accident years reserve development
Prior accident year development [1]	(1)	(2)	2
Segment Reconciling Items | Package Business [Member]
Prior accident years reserve development
Prior accident year development [1]	(6)	(24)	(39)
Segment Reconciling Items | Property Insurance [Member] | P&C Business Insurance [Member]
Prior accident years reserve development
Prior accident year development [1]	(7)	(7)	(11)
Segment Reconciling Items | Property Insurance [Member] | P&C Personal Insurance [Member]
Prior accident years reserve development
Prior accident year development [1]	(28)	(6)	(1)
Segment Reconciling Items | Professional liability
Prior accident years reserve development
Prior accident year development [1]	(27)	(2)	(11)
Segment Reconciling Items | Surety Product Line [Member]
Prior accident years reserve development
Prior accident year development [1]	(56)	(27)	(32)
Segment Reconciling Items | Assumed Reinsurance [Member]
Prior accident years reserve development
Prior accident year development [1]	24	34	19
Segment Reconciling Items | Automobile liability | P&C Business Insurance [Member]
Prior accident years reserve development
Prior accident year development [1]	47	20	38
Segment Reconciling Items | Automobile liability | P&C Personal Insurance [Member]
Prior accident years reserve development
Prior accident year development [1]	(30)	0	(14)
Segment Reconciling Items | Uncollectible reinsurance
Prior accident years reserve development
Prior accident year development [1]	(19)	13	3
Segment Reconciling Items | Insurance, Other [Member]
Prior accident years reserve development
Prior accident year development [1]	$ 15	$ 57	$ 27

Reserve for Unpaid Losses and_6

Reserve for Unpaid Losses and Loss Adjustment Expenses - Reconciliation of Loss Development to Liability for Unpaid Losses and Loss Adjustment Expenses, P&C (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Unpaid losses and loss adjustment expenses	$ 44,610	$ 42,318
Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Policyholder Benefits and Claims Incurred, Ceded	300
Deferred Revenue	64	209
Asbestos and Environmental
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Unpaid for Accident Years not Displayed in Triangles	224
Asbestos and Environmental | Reinsurance Policy, Type [Axis]: Asbestos and Environmental
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Policyholder Benefits and Claims Incurred, Ceded	1,500
Deferred Revenue	850
General liability | Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Policyholder Benefits and Claims Incurred, Ceded	105
Marine [Member] | Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Policyholder Benefits and Claims Incurred, Ceded	38
Property Insurance [Member] | P&C Business Insurance [Member] | Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Policyholder Benefits and Claims Incurred, Ceded	3
Automobile liability | P&C Business Insurance [Member] | Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Policyholder Benefits and Claims Incurred, Ceded	14
Professional liability | Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Policyholder Benefits and Claims Incurred, Ceded	95
Surety Product Line [Member] | Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Policyholder Benefits and Claims Incurred, Ceded	1
Assumed Reinsurance [Member] | Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Policyholder Benefits and Claims Incurred, Ceded	27
Short-Duration Insurance, Other [Member] | Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Policyholder Benefits and Claims Incurred, Ceded	17
Property and Casualty Insurance Products
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	71,145
Cumulative Paid for Accident Years Displayed in Triangles	(47,764)
Unpaid for Accident Years not Displayed in Triangles	5,381
Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance	1,222
Amount of discount	333	339	$ 347
Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance	29,651	27,348	26,618	$ 25,368
Reinsurance and Other Recoverables	6,753	6,696	6,465	6,081
Unpaid losses and loss adjustment expenses	36,404	34,044	33,083	$ 31,449
Policyholder Benefits and Claims Incurred, Ceded	1,241	$ 1,043	$ 1,338
Segment Reconciling Items | Asbestos and Environmental
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Unpaid for Accident Years not Displayed in Triangles	315
Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance	0
Amount of discount	0
Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance	315
Reinsurance and Other Recoverables	2,038
Unpaid losses and loss adjustment expenses	2,353
Segment Reconciling Items | Workers' Compensation
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	18,389
Cumulative Paid for Accident Years Displayed in Triangles	(9,665)
Unpaid for Accident Years not Displayed in Triangles	3,836
Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance	419
Amount of discount	319
Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance	12,660
Reinsurance and Other Recoverables	1,721
Unpaid losses and loss adjustment expenses	14,381
Segment Reconciling Items | General liability
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	9,416
Cumulative Paid for Accident Years Displayed in Triangles	(4,177)
Unpaid for Accident Years not Displayed in Triangles	494
Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance	202
Amount of discount	0
Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance	5,935
Reinsurance and Other Recoverables	1,230
Unpaid losses and loss adjustment expenses	7,165
Segment Reconciling Items | Marine [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	1,427
Cumulative Paid for Accident Years Displayed in Triangles	(1,114)
Unpaid for Accident Years not Displayed in Triangles	15
Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance	15
Amount of discount	0
Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance	343
Reinsurance and Other Recoverables	244
Unpaid losses and loss adjustment expenses	587
Segment Reconciling Items | Package Business [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	8,630
Cumulative Paid for Accident Years Displayed in Triangles	(6,279)
Unpaid for Accident Years not Displayed in Triangles	109
Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance	130
Amount of discount	0
Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance	2,590
Reinsurance and Other Recoverables	31
Unpaid losses and loss adjustment expenses	2,621
Segment Reconciling Items | Property Insurance [Member] | P&C Business Insurance [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	4,244
Cumulative Paid for Accident Years Displayed in Triangles	(3,676)
Unpaid for Accident Years not Displayed in Triangles	13
Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance	31
Amount of discount	0
Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance	612
Reinsurance and Other Recoverables	299
Unpaid losses and loss adjustment expenses	911
Segment Reconciling Items | Property Insurance [Member] | P&C Personal Insurance [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	5,876
Cumulative Paid for Accident Years Displayed in Triangles	(5,521)
Unpaid for Accident Years not Displayed in Triangles	6
Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance	42
Amount of discount	0
Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance	403
Reinsurance and Other Recoverables	5
Unpaid losses and loss adjustment expenses	408
Segment Reconciling Items | Automobile liability | P&C Business Insurance [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	4,606
Cumulative Paid for Accident Years Displayed in Triangles	(3,106)
Unpaid for Accident Years not Displayed in Triangles	16
Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance	38
Amount of discount	0
Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance	1,554
Reinsurance and Other Recoverables	113
Unpaid losses and loss adjustment expenses	1,667
Segment Reconciling Items | Automobile liability | P&C Personal Insurance [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	10,862
Cumulative Paid for Accident Years Displayed in Triangles	(9,240)
Unpaid for Accident Years not Displayed in Triangles	31
Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance	74
Amount of discount	0
Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance	1,727
Reinsurance and Other Recoverables	18
Unpaid losses and loss adjustment expenses	1,745
Segment Reconciling Items | Commercial automobile physical damage | P&C Business Insurance [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	239
Cumulative Paid for Accident Years Displayed in Triangles	(213)
Unpaid for Accident Years not Displayed in Triangles	4
Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance	1
Amount of discount	0
Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance	31
Reinsurance and Other Recoverables	0
Unpaid losses and loss adjustment expenses	31
Segment Reconciling Items | Professional liability
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	3,042
Cumulative Paid for Accident Years Displayed in Triangles	(1,567)
Unpaid for Accident Years not Displayed in Triangles	55
Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance	47
Amount of discount	0
Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance	1,577
Reinsurance and Other Recoverables	611
Unpaid losses and loss adjustment expenses	2,188
Segment Reconciling Items | Surety Product Line [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	667
Cumulative Paid for Accident Years Displayed in Triangles	(276)
Unpaid for Accident Years not Displayed in Triangles	19
Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance	33
Amount of discount	0
Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance	443
Reinsurance and Other Recoverables	14
Unpaid losses and loss adjustment expenses	457
Segment Reconciling Items | Assumed Reinsurance [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	2,107
Cumulative Paid for Accident Years Displayed in Triangles	(1,356)
Unpaid for Accident Years not Displayed in Triangles	0
Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance	7
Amount of discount	0
Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance	758
Reinsurance and Other Recoverables	30
Unpaid losses and loss adjustment expenses	788
Segment Reconciling Items | Personal automobile physical damage | P&C Personal Insurance [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	1,640
Cumulative Paid for Accident Years Displayed in Triangles	(1,574)
Unpaid for Accident Years not Displayed in Triangles	7
Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance	5
Amount of discount	0
Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance	78
Reinsurance and Other Recoverables	0
Unpaid losses and loss adjustment expenses	78
Segment Reconciling Items | Short-Duration Insurance, Other [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Unpaid for Accident Years not Displayed in Triangles	168
Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance	7
Amount of discount	14
Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance	161
Reinsurance and Other Recoverables	356
Unpaid losses and loss adjustment expenses	517
Segment Reconciling Items | Other operations
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Unpaid for Accident Years not Displayed in Triangles	293
Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance	171
Amount of discount	0
Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance	464
Reinsurance and Other Recoverables	43
Unpaid losses and loss adjustment expenses	$ 507

Reserve for Unpaid Losses and_7

Reserve for Unpaid Losses and Loss Adjustment Expenses - Historical Loss Development Triangles, P&C (Details) $ in Millions	Dec. 31, 2024 USD ($) claim	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Workers' Compensation | Segment Reconciling Items
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 18,389
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	9,665
Workers' Compensation | 2015
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,625	$ 1,625	$ 1,645	$ 1,667	$ 1,699	$ 1,714	$ 1,724	$ 1,801	$ 1,835	$ 1,873
IBNR Reserves	$ 329
Claims Reported | claim	114,700
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 1,200	1,179	1,151	1,117	1,068	1,004	909	778	576	261
Workers' Compensation | 2016
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,621	1,634	1,670	1,708	1,748	1,767	1,780	1,772	1,772
IBNR Reserves	$ 331
Claims Reported | claim	112,747
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 1,173	1,145	1,110	1,064	1,003	908	779	579	255
Workers' Compensation | 2017
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,597	1,635	1,665	1,757	1,822	1,840	1,869	1,862
IBNR Reserves	$ 392
Claims Reported | claim	112,274
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 1,118	1,087	1,035	977	900	778	575	261
Workers' Compensation | 2018
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,798	1,836	1,870	1,904	1,915	1,917	1,916
IBNR Reserves	$ 464
Claims Reported | claim	120,076
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 1,215	1,170	1,090	983	837	624	283
Workers' Compensation | 2019
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,864	1,899	1,934	1,934	1,935	1,937
IBNR Reserves	$ 528
Claims Reported | claim	121,158
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 1,204	1,129	1,007	856	637	291
Workers' Compensation | 2020
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,712	1,808	1,849	1,864	1,865
IBNR Reserves	$ 601
Claims Reported | claim	92,347
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 939	850	695	507	223
Workers' Compensation | Short-Duration Insurance Contract, Accident Year 2021 [Member]
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,831	1,831	1,832	1,831
IBNR Reserves	$ 675
Claims Reported | claim	103,229
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 920	780	562	254
Workers' Compensation | Short-Duration Insurance Contract, Accident Year 2022
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	2,001	2,001	2,000
IBNR Reserves	$ 819
Claims Reported | claim	114,189
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 910	649	293
Workers' Compensation | Short-Duration Insurance Contract, Accident Year 2023
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	2,166	2,166
IBNR Reserves	$ 1,171
Claims Reported | claim	117,297
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 677	286
Workers' Compensation | Short-Duration Insurance Contract, Accident Year 2024
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	2,174
IBNR Reserves	$ 1,536
Claims Reported | claim	109,521
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 309
General liability | Segment Reconciling Items
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	9,416
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	4,177
General liability | 2015
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	656	641	647	637	647	633	594	554	560	556
IBNR Reserves	$ 60
Claims Reported | claim	16,903
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 569	564	547	524	477	409	278	156	55	10
General liability | 2016
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	692	670	636	620	632	632	607	583	613
IBNR Reserves	$ 68
Claims Reported | claim	17,989
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 596	564	513	446	368	283	131	52	12
General liability | 2017
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	690	657	615	613	615	613	614	626
IBNR Reserves	$ 82
Claims Reported | claim	17,581
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 553	506	441	344	255	156	67	15
General liability | 2018
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	816	751	728	703	697	669	692
IBNR Reserves	$ 167
Claims Reported | claim	19,019
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 595	512	409	288	177	83	21
General liability | 2019
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	876	859	839	821	826	822
IBNR Reserves	$ 190
Claims Reported | claim	18,871
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 613	501	339	192	100	29
General liability | 2020
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	857	873	922	922	938
IBNR Reserves	$ 363
Claims Reported | claim	14,574
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 432	308	202	110	45
General liability | Short-Duration Insurance Contract, Accident Year 2021 [Member]
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,000	983	991	1,002
IBNR Reserves	$ 493
Claims Reported | claim	12,839
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 394	209	115	34
General liability | Short-Duration Insurance Contract, Accident Year 2022
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,167	1,110	1,116
IBNR Reserves	$ 746
Claims Reported | claim	12,673
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 281	134	26
General liability | Short-Duration Insurance Contract, Accident Year 2023
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,230	1,219
IBNR Reserves	$ 989
Claims Reported | claim	10,854
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 128	17
General liability | Short-Duration Insurance Contract, Accident Year 2024
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,432
IBNR Reserves	$ 1,366
Claims Reported | claim	7,290
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 16
Marine [Member] | Segment Reconciling Items
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,427
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,114
Marine [Member] | 2015
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	139	140	142	139	138	133	148	146	146	158
IBNR Reserves	$ 1
Claims Reported | claim	10,559
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 141	142	142	140	139	133	125	116	85	40
Marine [Member] | 2016
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	157	158	148	146	149	147	137	142	139
IBNR Reserves	$ 0
Claims Reported | claim	13,811
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 141	146	143	140	131	122	105	80	35
Marine [Member] | 2017
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	172	174	167	165	159	160	173	153
IBNR Reserves	$ 0
Claims Reported | claim	16,235
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 167	170	161	150	143	133	106	47
Marine [Member] | 2018
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	155	156	152	146	141	146	131
IBNR Reserves	$ (5)
Claims Reported | claim	10,812
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 151	159	142	135	126	94	33
Marine [Member] | 2019
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	127	127	129	134	135	139
IBNR Reserves	$ (3)
Claims Reported | claim	7,261
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 120	115	105	96	80	34
Marine [Member] | 2020
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	142	137	134	137	145
IBNR Reserves	$ 7
Claims Reported | claim	5,261
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 114	99	90	68	31
Marine [Member] | Short-Duration Insurance Contract, Accident Year 2021 [Member]
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	127	119	127	127
IBNR Reserves	$ 15
Claims Reported | claim	5,357
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 101	87	63	25
Marine [Member] | Short-Duration Insurance Contract, Accident Year 2022
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	130	132	140
IBNR Reserves	$ 22
Claims Reported | claim	5,306
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 89	72	27
Marine [Member] | Short-Duration Insurance Contract, Accident Year 2023
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	129	134
IBNR Reserves	$ 39
Claims Reported | claim	4,674
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 58	22
Marine [Member] | Short-Duration Insurance Contract, Accident Year 2024
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	149
IBNR Reserves	$ 83
Claims Reported | claim	3,735
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 32
Package Business [Member] | Segment Reconciling Items
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	8,630
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	6,279
Package Business [Member] | 2015
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	570	564	564	567	581	588	583	585	588	582
IBNR Reserves	$ 17
Claims Reported | claim	42,479
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 549	542	530	513	505	486	445	383	332	212
Package Business [Member] | 2016
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	582	590	591	595	611	625	632	638	655
IBNR Reserves	$ 24
Claims Reported | claim	44,381
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 549	545	540	521	500	465	410	353	225
Package Business [Member] | 2017
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	638	640	637	644	657	692	702	695
IBNR Reserves	$ 33
Claims Reported | claim	46,958
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 593	578	561	534	496	447	372	235
Package Business [Member] | 2018
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	671	654	655	667	688	724	719
IBNR Reserves	$ 46
Claims Reported | claim	45,361
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 609	571	537	498	451	402	237
Package Business [Member] | 2019
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	761	747	744	749	769	813
IBNR Reserves	$ 72
Claims Reported | claim	43,955
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 666	626	571	488	413	254
Package Business [Member] | 2020
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	828	837	877	893	915
IBNR Reserves	$ 101
Claims Reported | claim	62,964
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 699	648	573	493	326
Package Business [Member] | Short-Duration Insurance Contract, Accident Year 2021 [Member]
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	958	958	954	946
IBNR Reserves	$ 150
Claims Reported | claim	47,755
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 746	650	556	368
Package Business [Member] | Short-Duration Insurance Contract, Accident Year 2022
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,043	1,039	1,038
IBNR Reserves	$ 215
Claims Reported | claim	47,134
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 728	633	319
Package Business [Member] | Short-Duration Insurance Contract, Accident Year 2023
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,223	1,250
IBNR Reserves	$ 378
Claims Reported | claim	46,364
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 725	453
Package Business [Member] | Short-Duration Insurance Contract, Accident Year 2024
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,356
IBNR Reserves	$ 750
Claims Reported | claim	42,172
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 415
Property Insurance [Member] | P&C Business Insurance [Member] | Segment Reconciling Items
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	4,244
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	3,676
Property Insurance [Member] | P&C Business Insurance [Member] | 2015
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	299	301	301	301	304	305	301	302	301	298
IBNR Reserves	$ 0
Claims Reported | claim	20,977
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 300	301	302	302	303	301	296	284	257	179
Property Insurance [Member] | P&C Business Insurance [Member] | 2016
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	405	405	405	408	408	406	399	419	405
IBNR Reserves	$ 0
Claims Reported | claim	23,927
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 406	407	406	406	401	395	378	342	215
Property Insurance [Member] | P&C Business Insurance [Member] | 2017
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	438	439	438	440	438	456	516	577
IBNR Reserves	$ 2
Claims Reported | claim	24,627
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 441	440	438	432	427	411	378	229
Property Insurance [Member] | P&C Business Insurance [Member] | 2018
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	393	393	400	403	423	436	450
IBNR Reserves	$ 2
Claims Reported | claim	21,821
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 394	394	394	385	378	344	188
Property Insurance [Member] | P&C Business Insurance [Member] | 2019
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	420	421	420	418	439	480
IBNR Reserves	$ (1)
Claims Reported | claim	20,981
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 410	407	405	383	351	215
Property Insurance [Member] | P&C Business Insurance [Member] | 2020
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	437	438	440	469	501
IBNR Reserves	$ 49
Claims Reported | claim	20,529
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 373	367	355	336	221
Property Insurance [Member] | P&C Business Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2021 [Member]
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	434	463	500	531
IBNR Reserves	$ 15
Claims Reported | claim	18,283
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 412	403	383	241
Property Insurance [Member] | P&C Business Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2022
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	475	481	497
IBNR Reserves	$ 48
Claims Reported | claim	17,446
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 412	369	180
Property Insurance [Member] | P&C Business Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2023
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	424	448
IBNR Reserves	$ 86
Claims Reported | claim	17,003
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 300	199
Property Insurance [Member] | P&C Business Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2024
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	519
IBNR Reserves	$ 164
Claims Reported | claim	15,209
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 228
Property Insurance [Member] | P&C Personal Insurance [Member] | Segment Reconciling Items
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	5,876
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	5,521
Property Insurance [Member] | P&C Personal Insurance [Member] | 2015
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	682	682	684	684	684	684	684	690	703	690
IBNR Reserves	$ 0
Claims Reported | claim	120,023
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 682	682	682	681	681	680	674	665	645	487
Property Insurance [Member] | P&C Personal Insurance [Member] | 2016
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	658	658	658	658	658	658	663	673	669
IBNR Reserves	$ 0
Claims Reported | claim	119,818
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 658	657	656	655	653	649	640	621	481
Property Insurance [Member] | P&C Personal Insurance [Member] | 2017
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	769	771	774	775	783	884	889	866
IBNR Reserves	$ 4
Claims Reported | claim	124,780
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 763	761	762	761	757	795	747	538
Property Insurance [Member] | P&C Personal Insurance [Member] | 2018
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	642	645	639	642	673	910	903
IBNR Reserves	$ 8
Claims Reported | claim	102,924
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 628	626	627	619	616	712	484
Property Insurance [Member] | P&C Personal Insurance [Member] | 2019
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	465	467	468	470	475	501
IBNR Reserves	$ 1
Claims Reported | claim	84,810
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 463	460	458	445	425	318
Property Insurance [Member] | P&C Personal Insurance [Member] | 2020
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	499	505	513	512	525
IBNR Reserves	$ 5
Claims Reported | claim	88,546
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 490	486	478	454	335
Property Insurance [Member] | P&C Personal Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2021 [Member]
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	485	491	501	502
IBNR Reserves	$ 5
Claims Reported | claim	77,320
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 473	464	440	305
Property Insurance [Member] | P&C Personal Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2022
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	498	507	499
IBNR Reserves	$ 9
Claims Reported | claim	64,118
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 476	453	298
Property Insurance [Member] | P&C Personal Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2023
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	573	584
IBNR Reserves	$ 28
Claims Reported | claim	68,405
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 521	390
Property Insurance [Member] | P&C Personal Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2024
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	605
IBNR Reserves	$ 158
Claims Reported | claim	58,223
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 367
Automobile liability | P&C Business Insurance [Member] | Segment Reconciling Items
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	4,606
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	3,106
Automobile liability | P&C Business Insurance [Member] | 2015
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	358	360	358	360	359	356	356	372	358	308
IBNR Reserves	$ 5
Claims Reported | claim	28,750
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 351	350	348	344	335	314	267	207	142	62
Automobile liability | P&C Business Insurance [Member] | 2016
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	395	396	395	395	391	391	390	393	385
IBNR Reserves	$ 5
Claims Reported | claim	29,266
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 388	385	379	357	339	303	232	147	65
Automobile liability | P&C Business Insurance [Member] | 2017
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	398	398	394	381	383	379	383	372
IBNR Reserves	$ 2
Claims Reported | claim	26,420
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 389	386	368	328	285	211	134	60
Automobile liability | P&C Business Insurance [Member] | 2018
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	435	433	424	406	405	396	349
IBNR Reserves	$ 18
Claims Reported | claim	24,816
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 406	387	360	305	238	153	62
Automobile liability | P&C Business Insurance [Member] | 2019
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	479	471	460	450	439	425
IBNR Reserves	$ 20
Claims Reported | claim	28,627
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 428	393	327	247	160	67
Automobile liability | P&C Business Insurance [Member] | 2020
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	388	397	419	424	428
IBNR Reserves	$ 44
Claims Reported | claim	22,272
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 317	264	200	119	55
Automobile liability | P&C Business Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2021 [Member]
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	410	429	443	440
IBNR Reserves	$ 86
Claims Reported | claim	20,222
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 282	212	127	55
Automobile liability | P&C Business Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2022
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	547	500	468
IBNR Reserves	$ 158
Claims Reported | claim	20,891
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 294	171	64
Automobile liability | P&C Business Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2023
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	555	527
IBNR Reserves	$ 279
Claims Reported | claim	20,649
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 174	69
Automobile liability | P&C Business Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2024
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	641
IBNR Reserves	$ 501
Claims Reported | claim	19,954
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 77
Automobile liability | P&C Personal Insurance [Member] | Segment Reconciling Items
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	10,862
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	9,240
Automobile liability | P&C Personal Insurance [Member] | 2015
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,319	1,319	1,320	1,324	1,328	1,331	1,330	1,338	1,340	1,195
IBNR Reserves	$ 2
Claims Reported | claim	216,911
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 1,315	1,314	1,313	1,310	1,304	1,292	1,243	1,142	935	475
Automobile liability | P&C Personal Insurance [Member] | 2016
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,388	1,384	1,384	1,386	1,395	1,397	1,393	1,402	1,407
IBNR Reserves	$ 6
Claims Reported | claim	215,877
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 1,380	1,377	1,373	1,363	1,345	1,308	1,188	968	505
Automobile liability | P&C Personal Insurance [Member] | 2017
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,198	1,197	1,198	1,200	1,214	1,228	1,275	1,277
IBNR Reserves	$ 6
Claims Reported | claim	187,564
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 1,189	1,187	1,180	1,161	1,123	1,033	836	441
Automobile liability | P&C Personal Insurance [Member] | 2018
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,054	1,055	1,056	1,058	1,072	1,104	1,108
IBNR Reserves	$ 18
Claims Reported | claim	156,295
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 1,033	1,028	1,011	965	888	710	359
Automobile liability | P&C Personal Insurance [Member] | 2019
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	967	971	986	991	1,010	1,018
IBNR Reserves	$ 10
Claims Reported | claim	139,762
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 949	933	897	816	654	323
Automobile liability | P&C Personal Insurance [Member] | 2020
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	740	741	775	782	805
IBNR Reserves	$ 23
Claims Reported | claim	96,731
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 709	679	615	486	238
Automobile liability | P&C Personal Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2021 [Member]
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	846	852	886	881
IBNR Reserves	$ 57
Claims Reported | claim	102,129
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 760	691	553	247
Automobile liability | P&C Personal Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2022
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,009	1,018	928
IBNR Reserves	$ 132
Claims Reported | claim	107,911
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 813	662	301
Automobile liability | P&C Personal Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2023
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,129	1,138
IBNR Reserves	$ 270
Claims Reported | claim	107,253
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 731	329
Automobile liability | P&C Personal Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2024
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,212
IBNR Reserves	$ 622
Claims Reported | claim	94,233
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 361
Commercial automobile physical damage | P&C Business Insurance [Member] | Segment Reconciling Items
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	239
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	213
Commercial automobile physical damage | P&C Business Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2022
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	74	74	70
IBNR Reserves	$ 2
Claims Reported | claim	16,771
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 72	73	59
Commercial automobile physical damage | P&C Business Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2023
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	81	80
IBNR Reserves	$ 6
Claims Reported | claim	16,832
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 74	61
Commercial automobile physical damage | P&C Business Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2024
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	84
IBNR Reserves	$ 8
Claims Reported | claim	15,533
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 67
Professional liability | Segment Reconciling Items
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	3,042
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,567
Professional liability | 2015
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	192	197	196	198	206	213	190	179	174	164
IBNR Reserves	$ 1
Claims Reported | claim	7,279
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 181	185	175	163	140	124	107	85	40	9
Professional liability | 2016
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	202	191	193	195	194	196	203	176	183
IBNR Reserves	$ 20
Claims Reported | claim	8,462
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 175	176	166	147	124	111	88	51	8
Professional liability | 2017
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	227	217	242	239	225	231	203	205
IBNR Reserves	$ 14
Claims Reported | claim	9,555
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 189	190	179	149	121	87	48	11
Professional liability | 2018
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	312	324	265	271	270	274	243
IBNR Reserves	$ 18
Claims Reported | claim	9,910
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 260	232	194	161	127	71	15
Professional liability | 2019
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	385	354	347	330	313	295
IBNR Reserves	$ 81
Claims Reported | claim	9,972
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 265	241	197	147	77	21
Professional liability | 2020
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	298	324	336	363	369
IBNR Reserves	$ 106
Claims Reported | claim	8,034
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 171	147	117	71	19
Professional liability | Short-Duration Insurance Contract, Accident Year 2021 [Member]
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	306	327	343	339
IBNR Reserves	$ 149
Claims Reported | claim	6,761
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 127	95	55	15
Professional liability | Short-Duration Insurance Contract, Accident Year 2022
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	338	355	349
IBNR Reserves	$ 214
Claims Reported | claim	7,177
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 95	64	18
Professional liability | Short-Duration Insurance Contract, Accident Year 2023
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	388	384
IBNR Reserves	$ 260
Claims Reported | claim	8,049
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 76	20
Professional liability | Short-Duration Insurance Contract, Accident Year 2024
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	394
IBNR Reserves	$ 337
Claims Reported | claim	7,546
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 28
Surety Product Line [Member] | Segment Reconciling Items
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	667
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	276
Surety Product Line [Member] | 2015
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	29	37	42	47	48	54	60	63	67	67
IBNR Reserves	$ 4
Claims Reported | claim	1,413
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 25	25	25	30	32	34	31	24	20	9
Surety Product Line [Member] | 2016
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	28	34	37	45	51	55	61	61	61
IBNR Reserves	$ 8
Claims Reported | claim	1,348
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 20	20	22	22	22	20	15	12	2
Surety Product Line [Member] | 2017
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	65	68	70	79	94	101	90	63
IBNR Reserves	$ 22
Claims Reported | claim	1,799
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 43	43	43	42	54	55	46	5
Surety Product Line [Member] | 2018
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	54	63	70	71	72	68	68
IBNR Reserves	$ 24
Claims Reported | claim	1,750
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 29	30	29	24	23	16	6
Surety Product Line [Member] | 2019
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	61	70	73	74	73	72
IBNR Reserves	$ 44
Claims Reported | claim	1,925
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 17	16	16	15	13	3
Surety Product Line [Member] | 2020
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	80	83	79	84	83
IBNR Reserves	$ 51
Claims Reported | claim	2,294
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 27	26	21	12	4
Surety Product Line [Member] | Short-Duration Insurance Contract, Accident Year 2021 [Member]
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	84	88	85	85
IBNR Reserves	$ 55
Claims Reported | claim	2,989
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 29	23	21	8
Surety Product Line [Member] | Short-Duration Insurance Contract, Accident Year 2022
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	93	93	85
IBNR Reserves	$ 29
Claims Reported | claim	2,571
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 59	42	11
Surety Product Line [Member] | Short-Duration Insurance Contract, Accident Year 2023
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	83	81
IBNR Reserves	$ 63
Claims Reported | claim	1,647
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 17	8
Surety Product Line [Member] | Short-Duration Insurance Contract, Accident Year 2024
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	90
IBNR Reserves	$ 78
Claims Reported | claim	975
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 10
Assumed Reinsurance [Member] | Segment Reconciling Items
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	2,107
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,356
Assumed Reinsurance [Member] | 2015
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	96	96	96	96	96	95	94	94	92	102
IBNR Reserves	$ 0
Claims Reported | claim	1,737
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 96	96	95	95	94	91	83	77	64	$ 42
Assumed Reinsurance [Member] | 2016
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	104	104	102	101	102	100	98	91	88
IBNR Reserves	$ (1)
Claims Reported | claim	1,996
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 101	101	99	97	95	90	84	66	$ 36
Assumed Reinsurance [Member] | 2017
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	155	155	155	153	157	161	153	129
IBNR Reserves	$ 0
Claims Reported | claim	2,596
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 150	151	149	147	145	135	116	$ 44
Assumed Reinsurance [Member] | 2018
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	132	132	135	134	129	127	128
IBNR Reserves	$ (6)
Claims Reported | claim	3,078
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 133	144	141	139	133	111	$ 25
Assumed Reinsurance [Member] | 2019
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	208	208	190	186	189	181
IBNR Reserves	$ 11
Claims Reported | claim	3,843
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 185	176	159	153	132	$ 62
Assumed Reinsurance [Member] | 2020
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	181	178	186	180	183
IBNR Reserves	$ 11
Claims Reported | claim	3,374
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 151	132	113	89	$ 49
Assumed Reinsurance [Member] | Short-Duration Insurance Contract, Accident Year 2021 [Member]
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	204	203	195	191
IBNR Reserves	$ 22
Claims Reported | claim	2,698
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 157	132	102	$ 46
Assumed Reinsurance [Member] | Short-Duration Insurance Contract, Accident Year 2022
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	290	274	266
IBNR Reserves	$ 84
Claims Reported | claim	2,501
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 173	128	60
Assumed Reinsurance [Member] | Short-Duration Insurance Contract, Accident Year 2023
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	327	329
IBNR Reserves	$ 112
Claims Reported | claim	2,354
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 149	63
Assumed Reinsurance [Member] | Short-Duration Insurance Contract, Accident Year 2024
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	410
IBNR Reserves	$ 297
Claims Reported | claim	1,049
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 61
Personal automobile physical damage | P&C Personal Insurance [Member] | Segment Reconciling Items
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,640
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	1,574
Personal automobile physical damage | P&C Personal Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2022
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	539	549	533
IBNR Reserves	$ 3
Claims Reported | claim	239,634
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 536	538	$ 498
Personal automobile physical damage | P&C Personal Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2023
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	544	574
IBNR Reserves	$ 3
Claims Reported | claim	234,247
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 541	$ 513
Personal automobile physical damage | P&C Personal Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2024
Claims Development [Line Items]
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	557
IBNR Reserves	$ 28
Claims Reported | claim	199,915
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 497

Reserve for Unpaid Losses and_8

Reserve for Unpaid Losses and Loss Adjustment Expenses - Average Annual Payout of Incurred Claims by Age, P&C (Details)	Dec. 31, 2024
Workers' Compensation | P&C Business Insurance [Member]
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
1st Year	14.80%
2nd Year	18.40%
3rd Year	12.10%
4th Year	8.10%
5th Year	5.70%
6th Year	4%
7th Year	2.90%
8th Year	2.10%
9th Year	1.70%
10th Year	1.30%
General liability | P&C Business Insurance [Member]
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
1st Year	2.50%
2nd Year	7.80%
3rd Year	11.80%
4th Year	16.60%
5th Year	15.50%
6th Year	12.30%
7th Year	9.10%
8th Year	5.90%
9th Year	3.70%
10th Year	0.60%
Marine [Member] | P&C Business Insurance [Member]
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
1st Year	22.80%
2nd Year	32%
3rd Year	16.80%
4th Year	7.50%
5th Year	6.70%
6th Year	6.20%
7th Year	0.80%
8th Year	0.40%
9th Year	(1.50%)
10th Year	(0.70%)
Package Business [Member] | P&C Business Insurance [Member]
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
1st Year	35.80%
2nd Year	22.40%
3rd Year	9.60%
4th Year	9.30%
5th Year	6.40%
6th Year	4.30%
7th Year	3.30%
8th Year	2.10%
9th Year	1.40%
10th Year	1.20%
Property Insurance [Member] | P&C Business Insurance [Member]
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
1st Year	49.90%
2nd Year	31.90%
3rd Year	7.50%
4th Year	3.30%
5th Year	1.50%
6th Year	0.80%
7th Year	0%
8th Year	0.20%
9th Year	(0.20%)
10th Year	(0.50%)
Property Insurance [Member] | P&C Personal Insurance [Member]
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
1st Year	67.70%
2nd Year	26.20%
3rd Year	2%
4th Year	0.60%
5th Year	0.80%
6th Year	0.20%
7th Year	0.10%
8th Year	0.10%
9th Year	0.10%
10th Year	0%
Automobile liability | P&C Business Insurance [Member]
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
1st Year	14.10%
2nd Year	19.40%
3rd Year	20.10%
4th Year	17%
5th Year	12.20%
6th Year	6.80%
7th Year	4.20%
8th Year	1.20%
9th Year	0.70%
10th Year	0%
Automobile liability | P&C Personal Insurance [Member]
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
1st Year	32.70%
2nd Year	34.40%
3rd Year	16.30%
4th Year	8%
5th Year	3.60%
6th Year	1.40%
7th Year	0.60%
8th Year	0.20%
9th Year	0.20%
10th Year	0.10%
Commercial automobile physical damage | P&C Business Insurance [Member]
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
1st Year	78.20%
2nd Year	17.30%
3rd Year	(0.20%)
Professional liability | P&C Business Insurance [Member]
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
1st Year	5.30%
2nd Year	16.10%
3rd Year	16.50%
4th Year	11.80%
5th Year	9.60%
6th Year	10.30%
7th Year	8.90%
8th Year	3.40%
9th Year	2.40%
10th Year	(1.90%)
Surety Product Line [Member] | P&C Business Insurance [Member]
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
1st Year	11.10%
2nd Year	26.40%
3rd Year	11%
4th Year	8.60%
5th Year	1.20%
6th Year	(1.10%)
7th Year	(1.60%)
8th Year	(7.80%)
9th Year	(0.30%)
10th Year	(0.30%)
Assumed Reinsurance [Member] | P&C Business Insurance [Member]
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
1st Year	26.10%
2nd Year	33%
3rd Year	14.20%
4th Year	6.80%
5th Year	5.90%
6th Year	2.40%
7th Year	(1.00%)
8th Year	0.80%
9th Year	0.10%
10th Year	(0.40%)
Personal automobile physical damage | P&C Personal Insurance [Member]
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
1st Year	91.90%
2nd Year	6.30%
3rd Year	(0.40%)

Reserve for Unpaid Losses and_9

Reserve for Unpaid Losses and Loss Adjustment Expenses - PC Additional Information (Details) - USD ($) $ in Millions			12 Months Ended
	Apr. 20, 2023	May 23, 2019	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2017	Dec. 31, 2016
Liability for Claims and Claims Adjustment Expense [Line Items]
Unpaid losses and loss adjustment expenses			$ 44,610	$ 42,318
Reinsurance Recoverables, Gross			7,215	7,207
Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group
Liability for Claims and Claims Adjustment Expense [Line Items]
Reinsurance premium		$ 91
Adverse development from comprehensive annual review			300
Deferred Revenue			64	209
Reinsurance Recoverables, Gross			91
Change in Deferred Gain on Retroactive Reinsurance			145	0	$ 0
Insurance Recoveries				0	0
Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group | Retention Layer Above Reserve for the Covered Liabilities as of the Inception Date [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Reinsurance, Amount Retained, Per Policy			100
Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group | Retention Layer for Reserve for the Covered Liabilities as of the Inception Date [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Reinsurance, Amount Retained, Per Policy			1,816
Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group | Remaining [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Reinsurance, Excess Retention, Amount Reinsured, Per Policy			0
Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group | Maximum
Liability for Claims and Claims Adjustment Expense [Line Items]
Reinsurance, Excess Retention, Amount Reinsured, Per Policy			300
Asbestos and Environmental
Liability for Claims and Claims Adjustment Expense [Line Items]
Change in Deferred Gain on Retroactive Reinsurance			62	$ 194	$ 229
Asbestos and Environmental | Reinsurance Policy, Type [Axis]: Asbestos and Environmental
Liability for Claims and Claims Adjustment Expense [Line Items]
Reinsurance premium						$ 650	$ 650
Reinsurance, Amount Retained, Per Policy						$ 1,700
Adverse development from comprehensive annual review			1,500
Deferred Revenue			850
Asbestos and Environmental | Reinsurance Policy, Type [Axis]: Asbestos and Environmental | Remaining [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Reinsurance, Excess Retention, Amount Reinsured, Per Policy			0
Asbestos and Environmental | Reinsurance Policy, Type [Axis]: Asbestos and Environmental | Maximum
Liability for Claims and Claims Adjustment Expense [Line Items]
Reinsurance, Excess Retention, Amount Reinsured, Per Policy			1,500
General Liability [Member] | Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group
Liability for Claims and Claims Adjustment Expense [Line Items]
Adverse development from comprehensive annual review			105
General Liability [Member] | Abuse Claims [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Unpaid losses and loss adjustment expenses			$ 787
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years	$ 787

Reserve for Unpaid Losses an_10

Reserve for Unpaid Losses and Loss Adjustment Expenses - Group Benefits Liabilities for Unpaid Losses and Loss Adjustment Expenses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Liability for Claims and Claims Adjustment Expense [Line Items]
Beginning liabilities for unpaid losses and loss adjustment expenses, gross	$ 42,318
Payments
Ending liabilities for unpaid losses and loss adjustment expenses, gross	44,610	$ 42,318
Group Insurance Policy [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Beginning liabilities for unpaid losses and loss adjustment expenses, gross	8,274	8,160	$ 8,210
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	282	254	245	$ 245
Beginning liabilities for unpaid losses and loss adjustment expenses, net	8,020	7,915	7,965
Provision for unpaid losses and loss adjustment expenses
Current Year Claims and Claims Adjustment Expense	5,195	5,145	4,853
Prior year's discount accretion	194	193	202
Prior accident year development [1]	(561)	(502)	(381)
Total provision for unpaid losses and loss adjustment expenses	4,828	4,836	4,674
Payments
Current incurral year	(2,735)	(2,575)	(2,456)
Prior incurral years	(2,189)	(2,156)	(2,268)
Total payments	(4,924)	(4,731)	(4,724)
Ending liabilities for unpaid losses and loss adjustment expenses, net	7,924	8,020	7,915
Ending liabilities for unpaid losses and loss adjustment expenses, gross	8,206	8,274	8,160
Group Insurance Policy [Member] | Disability Insurance Policy [Member]
Provision for unpaid losses and loss adjustment expenses
Prior accident year development [1]	483	457	325
Group Insurance Policy [Member] | Group long-term disability
Liability for Claims and Claims Adjustment Expense [Line Items]
Beginning liabilities for unpaid losses and loss adjustment expenses, gross
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	270
Beginning liabilities for unpaid losses and loss adjustment expenses, net
Payments
Ending liabilities for unpaid losses and loss adjustment expenses, net	6,594
Ending liabilities for unpaid losses and loss adjustment expenses, gross	6,864
Group Insurance Policy [Member] | Group life and accident, excluding premium waiver
Liability for Claims and Claims Adjustment Expense [Line Items]
Beginning liabilities for unpaid losses and loss adjustment expenses, gross
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	4
Beginning liabilities for unpaid losses and loss adjustment expenses, net
Provision for unpaid losses and loss adjustment expenses
Prior accident year development [1]	80	36	50
Payments
Ending liabilities for unpaid losses and loss adjustment expenses, net	682
Ending liabilities for unpaid losses and loss adjustment expenses, gross	686
Group Insurance Policy [Member] | Group supplemental health
Liability for Claims and Claims Adjustment Expense [Line Items]
Beginning liabilities for unpaid losses and loss adjustment expenses, gross
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	5
Beginning liabilities for unpaid losses and loss adjustment expenses, net
Provision for unpaid losses and loss adjustment expenses
Prior accident year development [1]		9	6
Payments
Ending liabilities for unpaid losses and loss adjustment expenses, net	34
Ending liabilities for unpaid losses and loss adjustment expenses, gross	39
Group Insurance Policy [Member] | Other Operating Income (Expense) [Member]
Provision for unpaid losses and loss adjustment expenses
Total provision for unpaid losses and loss adjustment expenses	$ 175	$ 182	$ 185

Reserve for Unpaid Losses an_11

Reserve for Unpaid Losses and Loss Adjustment Expenses - Discounted Reserves, Group (Details) - Group Benefits - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Weighted Average Discount Rate [Line Items]
Liability for unpaid losses and loss adjustment expenses, at undiscounted amounts	$ 8,111	$ 8,150	$ 8,124
Discount	(1,196)	(1,166)	(1,205)
Carrying value of liability for unpaid losses and loss adjustment expenses	$ 6,915	$ 6,984	$ 6,919
Minimum
Weighted Average Discount Rate [Line Items]
Weighted average discount rate	2.10%	2.10%	2.10%
Maximum
Weighted Average Discount Rate [Line Items]
Weighted average discount rate	8%	8%	8%
Weighted Average Expected Life
Weighted Average Discount Rate [Line Items]
Weighted average discount rate	3.30%	3.20%	3.20%

Reserve for Unpaid Losses an_12

Reserve for Unpaid Losses and Loss Adjustment Expenses - Reconciliation of Loss Development to Liability for Unpaid Losses and Loss Adjustment Expenses, Group (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Unpaid losses and loss adjustment expenses	$ 44,610	$ 42,318
Group Benefits
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	20,578
Cumulative Paid for Accident Years Displayed in Triangles	(13,912)
Unpaid for Accident Years not Displayed in Triangles	2,237
Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance	217
Discount	(1,196)	(1,166)	$ (1,205)
Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance	7,924	8,020	7,915	$ 7,965
Reinsurance and Other Recoverables	(282)	(254)	(245)	(245)
Unpaid losses and loss adjustment expenses	8,206	$ 8,274	$ 8,160	$ 8,210
Group long-term disability | Group Benefits
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	14,365
Cumulative Paid for Accident Years Displayed in Triangles	(8,243)
Unpaid for Accident Years not Displayed in Triangles	1,400
Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance	193
Discount	(1,121)
Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance	6,594
Reinsurance and Other Recoverables	(270)
Unpaid losses and loss adjustment expenses	6,864
Group life and accident, excluding premium waiver | Group Benefits
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	6,213
Cumulative Paid for Accident Years Displayed in Triangles	(5,669)
Unpaid for Accident Years not Displayed in Triangles	145
Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance	5
Discount	(12)
Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance	682
Reinsurance and Other Recoverables	(4)
Unpaid losses and loss adjustment expenses	686
Group short-term disability | Group Benefits
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Unpaid for Accident Years not Displayed in Triangles	173
Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance	10
Discount	0
Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance	183
Reinsurance and Other Recoverables	0
Unpaid losses and loss adjustment expenses	183
Group life premium waiver | Group Benefits
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Unpaid for Accident Years not Displayed in Triangles	485
Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance	9
Discount	(63)
Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance	431
Reinsurance and Other Recoverables	(3)
Unpaid losses and loss adjustment expenses	434
Group supplemental health | Group Benefits
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Unpaid for Accident Years not Displayed in Triangles	34
Unpaid Unallocated Loss Adjustment Expenses, Net of Reinsurance	0
Discount	0
Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance	34
Reinsurance and Other Recoverables	(5)
Unpaid losses and loss adjustment expenses	$ 39

Reserve for Unpaid Losses an_13

Reserve for Unpaid Losses and Loss Adjustment Expenses - Historical Loss Development Triangles, Group (Details) - Group Benefits $ in Millions	Dec. 31, 2024 USD ($) claim	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Claims Development [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	$ 20,578
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	13,912
Group long-term disability
Claims Development [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	14,365
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	8,243
Group life and accident, excluding premium waiver
Claims Development [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	6,213
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	5,669
2015 | Group long-term disability
Claims Development [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	1,385	$ 1,380	$ 1,380	$ 1,380	$ 1,385	$ 1,401	$ 1,420	$ 1,422	$ 1,442	$ 1,595
IBNR Reserves	$ 0
Claims Reported | claim	32,589
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 1,164	1,125	1,078	1,025	962	891	806	687	460	$ 108
2016 | Group long-term disability
Claims Development [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	1,407	1,400	1,401	1,409	1,417	1,437	1,468	1,481	1,651
IBNR Reserves	$ 0
Claims Reported | claim	33,307
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 1,144	1,100	1,043	981	907	819	705	479	$ 112
2017 | Group long-term disability
Claims Development [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	1,294	1,289	1,296	1,304	1,316	1,358	1,413	1,597
IBNR Reserves	$ 0
Claims Reported | claim	30,929
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 1,017	970	911	842	757	658	452	$ 109
2018 | Group long-term disability
Claims Development [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	1,279	1,271	1,276	1,277	1,309	1,387	1,647
IBNR Reserves	$ 0
Claims Reported | claim	28,428
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 954	897	827	743	639	447	$ 105
2019 | Group long-term disability
Claims Development [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	1,277	1,287	1,284	1,327	1,424	1,650
IBNR Reserves	$ 0
Claims Reported | claim	27,467
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 895	832	751	650	454	$ 101
2020 | Group long-term disability
Claims Development [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	1,260	1,282	1,323	1,407	1,686
IBNR Reserves	$ 0
Claims Reported | claim	25,862
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 839	767	663	458	$ 100
Short-Duration Insurance Contract, Accident Year 2021 [Member] | Group long-term disability
Claims Development [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	1,351	1,417	1,521	1,768
IBNR Reserves	$ 1
Claims Reported | claim	27,156
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 820	720	493	$ 101
Short-Duration Insurance Contract, Accident Year 2022 | Group long-term disability
Claims Development [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	1,452	1,566	1,842
IBNR Reserves	$ 6
Claims Reported | claim	25,952
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 719	496	101
Short-Duration Insurance Contract, Accident Year 2022 | Group life and accident, excluding premium waiver
Claims Development [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	2,056	2,053	2,061
IBNR Reserves	$ 12
Claims Reported | claim	72,225
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 2,040	2,018	$ 1,562
Short-Duration Insurance Contract, Accident Year 2023 | Group long-term disability
Claims Development [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	1,700	1,988
IBNR Reserves	$ 44
Claims Reported | claim	28,026
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 562	116
Short-Duration Insurance Contract, Accident Year 2023 | Group life and accident, excluding premium waiver
Claims Development [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	2,092	2,108
IBNR Reserves	$ 25
Claims Reported | claim	74,958
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 2,053	$ 1,572
Short-Duration Insurance Contract, Accident Year 2024 | Group long-term disability
Claims Development [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	1,960
IBNR Reserves	$ 970
Claims Reported | claim	18,035
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 129
Short-Duration Insurance Contract, Accident Year 2024 | Group life and accident, excluding premium waiver
Claims Development [Line Items]
Cumulative Incurred for Accident Years Displayed in Triangles	2,065
IBNR Reserves	$ 380
Claims Reported | claim	59,084
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 1,576

Reserve for Unpaid Losses an_14

Reserve for Unpaid Losses and Loss Adjustment Expenses - Average Annual Payout of Incurred Claims by Age, Group (Details) - Group Benefits	Dec. 31, 2024
Group life and accident, excluding premium waiver
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
1st Year	75.80%
2nd Year	22.60%
3rd Year	1.10%
Group long-term disability
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
1st Year	7.60%
2nd Year	27%
3rd Year	15.90%
4th Year	8%
5th Year	6.30%
6th Year	5.20%
7th Year	4.50%
8th Year	3.80%
9th Year	3.30%
10th Year	2.80%

Reserve for Unpaid Losses an_15

Reserve for Unpaid Losses and Loss Adjustment Expenses - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2017	Dec. 31, 2021
Liability for Claims and Claims Adjustment Expense [Line Items]
Unpaid losses and loss adjustment expenses	$ 44,610	$ 42,318
Asbestos and Environmental
Liability for Claims and Claims Adjustment Expense [Line Items]
Change in Deferred Gain on Retroactive Reinsurance	62	194	$ 229
Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group
Liability for Claims and Claims Adjustment Expense [Line Items]
Change in Deferred Gain on Retroactive Reinsurance	145	0	0
Reinsurance Policy, Type [Axis]: Asbestos and Environmental | Asbestos and Environmental
Liability for Claims and Claims Adjustment Expense [Line Items]
Reinsurance, Amount Retained, Per Policy				$ 1,700
Retention Layer for Reserve for the Covered Liabilities as of the Inception Date [Member] | Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group
Liability for Claims and Claims Adjustment Expense [Line Items]
Reinsurance, Amount Retained, Per Policy	1,816
Retention Layer Above Reserve for the Covered Liabilities as of the Inception Date [Member] | Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group
Liability for Claims and Claims Adjustment Expense [Line Items]
Reinsurance, Amount Retained, Per Policy	100
Group Benefits
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior accident year development [1]	(561)	(502)	(381)
Unpaid losses and loss adjustment expenses	8,206	8,274	8,160		$ 8,210
Group Benefits | Group long-term disability
Liability for Claims and Claims Adjustment Expense [Line Items]
Unpaid losses and loss adjustment expenses	6,864
Group Benefits | Disability Insurance Policy [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior accident year development [1]	483	457	325
Group Benefits | Group life and accident, excluding premium waiver
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior accident year development [1]	80	36	50
Unpaid losses and loss adjustment expenses	686
Group Benefits | Group supplemental health
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior accident year development [1]		$ 9	$ 6
Unpaid losses and loss adjustment expenses	$ 39

Reserve for Future Policy Ben_3

Reserve for Future Policy Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, before Reinsurance	$ 448	$ 484	$ 502
Fixed Annuity
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change	128	137	140	$ 188
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax	0	7	4	47
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance	128	130	136	141
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change		2	(2)	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience		1	1	0
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change		133	135	141
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	7	7	8
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	(12)	(12)	(13)
Liability for Future Policy Benefit, before Reinsurance	$ 128	$ 137	$ 140
Liability for Future Policy Benefit, Weighted-Average Duration	9 years 2 months 12 days	9 years	9 years 2 months 12 days
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	$ 256	$ 257	$ 272
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	$ 0	$ 0	$ 0
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate	5.60%	5.60%	5.60%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate	5.50%	5%	5.30%
Life Conversions
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change	$ 45	$ 49	$ 47	58
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change	106	113	112	152
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax	(15)	(11)	(14)	19
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance	121	124	126	133
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change		2	0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience		3	7	5
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change		129	133	138
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	20	20	17
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	(28)	(29)	(29)
Liability for Future Policy Benefit, before Reinsurance	$ 61	$ 64	$ 65
Liability for Future Policy Benefit, Weighted-Average Duration	11 years	12 years 2 months 12 days	11 years 4 months 24 days
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	$ 198	$ 204	$ 212
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	$ 106	$ 114	$ 120
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate	4.30%	4.20%	4.10%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate	5.60%	5.10%	5.30%
Paid Up Life
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change	$ 168	$ 185	$ 192	262
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax	(33)	(32)	(39)	14
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance	201	217	231	248
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change		0	0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience		(1)	(1)	0
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change		216	230	$ 248
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	7	8	7
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	(22)	(21)	(24)
Liability for Future Policy Benefit, before Reinsurance	$ 168	$ 185	$ 192
Liability for Future Policy Benefit, Weighted-Average Duration	6 years 3 months 18 days	6 years 4 months 24 days	6 years 4 months 24 days
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	$ 260	$ 281	$ 300
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	$ 0	$ 0	$ 0
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate	2.90%	2.90%	2.90%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate	5.30%	5%	5.20%
Deferred Profit Liability
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, before Reinsurance	$ 17	$ 20	$ 19
Long-Duration Insurance, Other
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, before Reinsurance	$ 74	$ 78	$ 86

Other Policyholder Funds and _3

Other Policyholder Funds and Benefits Payable (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Policyholder Account Balance	$ 614	$ 638	$ 658
Universal Life
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Policyholder Account Balance	206	223	232	$ 253
Policyholder Account Balance, Premium Received	13	14	15
Policyholder Account Balance, Policy Charge	(23)	(21)	(23)
Policyholder Account Balance, Surrender and Withdrawal	(5)	(6)	(4)
Policyholder Account Balance, Benefit Payment	(9)	(6)	(20)
Policyholder Account Balance, Interest Expense	$ 7	$ 10	$ 11
Policyholder Account Balance, Weighted Average Crediting Rate	4.30%	4.20%	4.20%
Policyholder Account Balance, Net Amount at Risk	$ 824	$ 917	$ 987
Policyholder Account Balance, Cash Surrender Value	$ 205	221	229
Universal Life | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 to 0499 | Minimum [Member]
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Policyholder Account Balance, Guaranteed Minimum Credit Rating	4%
Universal Life | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 to 0499 | Maximum
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Policyholder Account Balance, Guaranteed Minimum Credit Rating	5%
Universal Life | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 to 0499 | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Policyholder Account Balance	$ 205	222	230
Short-Duration Insurance, Other [Member]
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Policyholder Account Balance	$ 408	$ 415	$ 426

Debt - Short-term and Long-term

Debt - Short-term and Long-term Debt by Issuance (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Schedule of Debt [Line Items]
Revolving Credit Facilities	$ 0	$ 0
Total Notes and Debentures	4,482	4,482
Unamortized discount and debt issuance cost [2]	116	120
Total Debt	4,366	4,362
Less: Current maturities	0	0
Long-Term Debt	$ 4,366	4,362
Interest rate derivatives
Schedule of Debt [Line Items]
Derivative, Maturity Date	Feb. 15, 2027
2.8% Notes, due 2029
Schedule of Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.80%
Senior Notes and Debentures	$ 600	600
5.95% Notes, due 2036
Schedule of Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.95%
Senior Notes and Debentures	$ 300	300
6.625% Notes, due 2040
Schedule of Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.625%
Senior Notes and Debentures	$ 295	295
6.1% Notes, due 2041
Schedule of Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.10%
Senior Notes and Debentures	$ 409	409
Debt Instrument, Unamortized Discount	$ 68	70
Debt Instrument, Interest Rate, Effective Percentage	7.90%
6.625% Notes, due 2042
Schedule of Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.625%
Senior Notes and Debentures	$ 178	178
4.3% Notes, due 2043
Schedule of Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.30%
Senior Notes and Debentures	$ 300	300
4.4% Notes, due 2048
Schedule of Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.40%
Senior Notes and Debentures	$ 500	500
3.6% Notes, due 2049
Schedule of Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.60%
Senior Notes and Debentures	$ 800	800
2.9% Notes, due 2051
Schedule of Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.90%
Senior Notes and Debentures	$ 600	600
SOFR Plus Two Point One Two Five Percent Plus Zero Point Two Six One Six One Percent Junior Subordinated Notes Due Two Thousand Sixty Seven
Schedule of Debt [Line Items]
Junior Subordinated Debentures	$ 500	$ 500
SOFR Plus Two Point One Two Five Percent Plus Zero Point Two Six One Six One Percent Junior Subordinated Notes Due Two Thousand Sixty Seven | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Schedule of Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	300%
SOFR Plus Two Point One Two Five Percent Plus Zero Point Two Six One Six One Percent Junior Subordinated Notes Due Two Thousand Sixty Seven | hig_Tenor Spread Adjustment
Schedule of Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.26161%
SOFR Plus Two Point One Two Five Percent Plus Zero Point Two Six One Six One Percent Junior Subordinated Notes Due Two Thousand Sixty Seven | Credit Spread Adjustment
Schedule of Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.125%

Debt - Long-Term Debt Maturitie

Debt - Long-Term Debt Maturities (Details) $ in Millions	Dec. 31, 2024 USD ($)
Debt Disclosure [Abstract]
2024 - Current maturities	$ 0
Long-Term Debt, Maturity, Year Two	0
Long-Term Debt, Maturity, Year Three	0
Long-Term Debt, Maturity, Year Four	0
Long-Term Debt, Maturity, Year Five	600
Thereafter	$ 3,882

Debt - Junior Subordinated Debt

Debt - Junior Subordinated Debt (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Debt Instrument, Payment Terms	The Company has the right to defer interest payments for up to a consecutive ten years without giving rise to an event of default. Deferred interest will continue to accrue and will accrue additional interest at the then applicable interest rate. If the Company defers interest payments, the Company generally may not make payments on or redeem or purchase any shares of its capital stock or any of its debt securities or guarantees that rank upon liquidation, dissolution or winding up equally with or junior to the debentures, subject to certain limited exceptions.
SOFR Plus Two Point One Two Five Percent Plus Zero Point Two Six One Six One Percent Junior Subordinated Notes Due Two Thousand Sixty Seven
Debt Instrument [Line Items]
Junior Subordinated Debentures	$ 500	$ 500

Debt - Additional Information (

Debt - Additional Information (Details) £ in Millions, $ in Millions		12 Months Ended
	Feb. 22, 2022	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2024 GBP (£)	Oct. 21, 2024 USD ($)	Oct. 21, 2024 GBP (£)	Dec. 31, 2023 GBP (£)
Debt Instrument [Line Items]
Registration Payment Arrangement, Term	three-year
Federal Home Loan Bank, Advances, Affordable Housing Program, Principal Outstanding		$ 0	$ 0
Revolving Credit Facilities		0	0
Maximum | Hartford Fire Insurance Company [Member]
Debt Instrument [Line Items]
Debt Instrument, Collateral Amount		1,400
Maximum | Hartford Life and Accident Insurance Company [Member]
Debt Instrument [Line Items]
Debt Instrument, Collateral Amount		600
Letter of Credit | Credit Facility [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		$ 0	$ 0
Line of Credit Facility, Description		Letters of credit bear a fee based on The Hartford's credit rating and expire no later than October 27, 2027
Line of Credit Facility, Maximum Borrowing Capacity		$ 100
Revolving Credit Facility | Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Covenant Compliance		in compliance	in compliance
Line of Credit Facility, Covenant Terms		The Credit Facility requires the Company to maintain a minimum consolidated net worth financial covenant to $11.25 billion, excluding AOCI, limits the ratio of senior debt to capitalization, excluding AOCI, at 35% and includes other customary covenants.
Line of Credit Facility, Description		with an expiration date of October 27, 2026. Under the Credit Facility: •Revolving loans may be in multiple currencies. •U.S. dollar loans will bear interest at a floating rate equivalent to an indexed rate that varies depending on the type of borrowing plus a basis point spread based on The Hartford's credit rating and will mature no later than October 27, 2026.
Line of Credit Facility, Maximum Borrowing Capacity		$ 750
Revolving Credit Facilities		0	$ 0
Tranche One [Member] | Letter of Credit | Lloyd's Facility
Debt Instrument [Line Items]
Debt Instrument, Face Amount					$ 74
Letters of Credit Outstanding, Amount		74	74
Tranche Two [Member] | Letter of Credit | Lloyd's Facility
Debt Instrument [Line Items]
Debt Instrument, Face Amount		99				£ 79
Letters of Credit Outstanding, Amount		$ 99	$ 101	£ 79			£ 79

Commitments and Contingencies -

Commitments and Contingencies - Commitments and Contingencies (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2017	Dec. 31, 2021
Loss Contingencies [Line Items]
Other Commitment	$ 3,800
Loss Contingency, Undiscounted Amount of Insurance-related Assessment Liability	70	$ 77
Premium tax offsets	0	0
Fair value of derivative instrument in a net liability position	33
Collateral already posted	31
Additional Collateral, Aggregate Fair Value	0
Other liabilities | Retained Earnings
Loss Contingencies [Line Items]
Off-Balance Sheet, Credit Loss, Liability	$ 7	9	$ 22		$ 25
Insurance-related Assessments [Member]
Loss Contingencies [Line Items]
Minimum Percentage of Premiums Written Per Year to be Considered for Assessment Under Guaranty Fund	1%
Maximum Percentage of Premiums Written Per Year to be Considered for Assessment Under Guaranty Fund	2%
Limited partnerships and other alternative investments
Loss Contingencies [Line Items]
Other Commitment	$ 2,100
Private Placement Securities
Loss Contingencies [Line Items]
Other Commitment	1,000
Mortgage loans
Loss Contingencies [Line Items]
Other Commitment	636
Cancelable mortgage loan [Member]
Loss Contingencies [Line Items]
Other Commitment	53
Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group
Loss Contingencies [Line Items]
Deferred Revenue	64	209
Adverse development from comprehensive annual review	300
Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group | Remaining [Member]
Loss Contingencies [Line Items]
Reinsurance, Excess Retention, Amount Reinsured, Per Policy	0
Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group | Maximum
Loss Contingencies [Line Items]
Reinsurance, Excess Retention, Amount Reinsured, Per Policy	300
Reinsurance Policy, Type [Axis]: Retroactive Reinsurance [Member] | Other liabilities
Loss Contingencies [Line Items]
Deferred Revenue	914	997
Asbestos and Environmental
Loss Contingencies [Line Items]
Liability for unpaid losses and loss adjustment expenses, at undiscounted amounts	224
Asbestos and Environmental | Segment Reconciling Items
Loss Contingencies [Line Items]
Liability for unpaid losses and loss adjustment expenses, at undiscounted amounts	315
Prior accident year development [1]	141	$ 0	$ 0
Asbestos and Environmental | Reinsurance Policy, Type [Axis]: Asbestos and Environmental
Loss Contingencies [Line Items]
Deferred Revenue	850
Reinsurance, Amount Retained, Per Policy				$ 1,700
Adverse development from comprehensive annual review	1,500
Asbestos and Environmental | Reinsurance Policy, Type [Axis]: Asbestos and Environmental | Remaining [Member]
Loss Contingencies [Line Items]
Reinsurance, Excess Retention, Amount Reinsured, Per Policy	0
Asbestos and Environmental | Reinsurance Policy, Type [Axis]: Asbestos and Environmental | Maximum
Loss Contingencies [Line Items]
Reinsurance, Excess Retention, Amount Reinsured, Per Policy	$ 1,500

Equity - Equity Repurchase Prog

Equity - Equity Repurchase Program (Details) - USD ($) shares in Millions, $ in Millions	2 Months Ended	12 Months Ended
	Feb. 20, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Jul. 01, 2024	Jul. 01, 2022	Dec. 01, 2020
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Value, Acquired, Cost Method		$ 1,500	$ 1,400	$ 1,600
Treasury Stock, Shares, Acquired		14.4	19.2	22.3
Share Repurchase Excise Tax
Equity, Class of Treasury Stock [Line Items]
Taxes Payable		$ 12
Subsequent Event [Member]
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Value, Acquired, Cost Method	$ 248
Treasury Stock, Shares, Acquired	2.2
8/1/2024-12/31/2026
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Authorized Amount					$ 3,300
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 3,150
8/1/2022-12/31/2024
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Authorized Amount						$ 3,000
1/1/2020-12/31/2022 [Member]
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Authorized Amount							$ 3,000

Equity - Preferred Stock (Detai

Equity - Preferred Stock (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Class of Stock [Line Items]
Issuance of preferred shares	13,800	13,800
Preferred Stock, Liquidation Preference, Value	$ 345,000,000	$ 345,000,000
Preferred Stock, end of period
Class of Stock [Line Items]
Issuance of preferred shares	13,800,000
Preferred Stock, Liquidation Preference, Value	$ 25,000
Share Price	$ 25
Other Restrictions on Payment of Dividends	no
Preferred Stock, Redemption Price Per Share	$ 25,000

Equity - Statutory Results (Det

Equity - Statutory Results (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statutory Accounting Practices [Line Items]
Statutory Net Income	$ 2,688	$ 2,479	$ 1,892
Statutory Capital	16,002	15,297
Group Insurance Policy [Member]
Statutory Accounting Practices [Line Items]
Statutory Net Income	576	592	378
Statutory Capital	2,708	2,748
Property and Casualty Insurance Subsidiaries
Statutory Accounting Practices [Line Items]
Statutory Net Income	2,112	1,887	$ 1,514
Statutory Capital	$ 13,294	$ 12,549

Equity - Regulatory Capital Req

Equity - Regulatory Capital Requirements (Details)	12 Months Ended
	Dec. 31, 2024
Geographic Distribution, Domestic [Member]
Capital Requirements on Foreign Financial Institutions [Line Items]
Statutory Accounting Practices, Risk Based Capital Requirements Compliance Assertion	All of the Company's operating insurance subsidiaries had RBC ratios in excess of the minimum levels required by the applicable insurance regulations.
Geographic Distribution, Foreign [Member]
Capital Requirements on Foreign Financial Institutions [Line Items]
Statutory Accounting Practices, Risk Based Capital Requirements Compliance Assertion	All of the Company's international insurance subsidiaries expect to maintain capital levels in excess of the minimum levels required by the applicable regulatory authorities.

Equity - Dividend Restrictions,

Equity - Dividend Restrictions, Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2025
Class of Stock [Line Items]
Percent of insurer's policyholder surplus available for dividends	10%
Statutory Dividend Payment Restrictions Disclosure	There are no current restrictions on HIG Holding Company's ability to pay dividends to its stockholders.
HLA
Class of Stock [Line Items]
Proceeds from Dividends Received	$ 608
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval	592
HLA | Scenario, Forecast
Class of Stock [Line Items]
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval		$ 590
Mutual Fund [Member]
Class of Stock [Line Items]
Proceeds from Dividends Received	136
Other Non-Insurance Subsidiaries [Member]
Class of Stock [Line Items]
Proceeds from Dividends Received	31
P&C Subsidiaries
Class of Stock [Line Items]
Proceeds from Dividends Received	1,500
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval	2,000
P&C Subsidiaries | Scenario, Forecast
Class of Stock [Line Items]
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval		$ 1,700
P&C Runoff Subsidiaries
Class of Stock [Line Items]
Proceeds from Dividends Received	75
Harford Holdings, Inc. [Member]
Class of Stock [Line Items]
Proceeds from Dividends Received	$ 50

Equity - Restricted Net Assets,

Equity - Restricted Net Assets, Additional Information (Details) $ in Billions	Dec. 31, 2024 USD ($)
Equity [Abstract]
Restricted net assets	$ 15.1

Income Taxes - Income Tax Expen

Income Taxes - Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Current - U.S. Federal	$ 783	$ 582	$ 550
International	2	0	(1)
Total current	785	582	549
Deferred - U.S. Federal	(57)	6	(124)
International	10	(4)	18
Total deferred	(47)	2	(106)
Total income tax expense (benefit)	$ 738	$ 584	$ 443

Income Taxes - Effective Income

Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Tax provision at U.S. federal statutory rate	$ 808	$ 648	$ 474
Nontaxable net investment income	(40)	(41)	(29)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	30	23	2
Total income tax expense (benefit)	$ 738	$ 584	$ 443

Income Taxes - Deferred tax ass

Income Taxes - Deferred tax assets (liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Loss reserves and tax discount	$ 550	$ 517
Unearned premium reserve and other underwriting related reserves	517	483
Employee benefits	181	172
Deferred Tax Assets, Other Comprehensive Loss	394	387
Net operating loss carryover	41	45
Other	0	1
Total Deferred Tax Assets	1,683	1,605
Deferred Tax Assets, Valuation Allowance	0	(12)
Deferred Tax Assets, Net of Valuation Allowance	1,683	1,593
Deferred acquisition costs	(183)	(163)
Net unrealized gains on investments	(167)	(110)
Other depreciable and amortizable assets	(91)	(147)
Total Deferred Tax Liabilities	(454)	(420)
Net Deferred Tax Asset	1,229	1,173
Deferred Tax Liabilities, Other	$ 13	$ 0

Income Taxes - Uncertain Tax Po

Income Taxes - Uncertain Tax Positions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits	$ 24	$ 26	$ 22	$ 16
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions	3	5	6
Unrecognized Tax Benefits, Decrease Resulting from Current Period Tax Positions	(1)	0	0
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	(4)	(1)	0
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Unrecognized Tax Benefits	24	$ 26	$ 22	$ 16
TaxYear2022and PriorMember
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits	14
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Unrecognized Tax Benefits	$ 14

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from domestic operations	$ 3,758	$ 3,042	$ 2,260
Losses from foreign operations	91	46	2
Accrued Income Taxes		18
Current State and Local Tax Expense (Benefit)	4	3	4
Deferred Tax Assets, Operating Loss Carryforwards	41	45
Deferred Tax Assets, Valuation Allowance	0	12
Income Tax Examination, Penalties and Interest Expense	(1)	(2)	(1)
Income Taxes Receivable	12
Lapse of statute of limitations	4	1	$ 0
Foreign Tax Authority [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Deferred Tax Assets, Valuation Allowance	$ 0	$ 12

Changes in and Reclassificati_3

Changes in and Reclassifications From Accumulated Other Comprehensive Income (Loss) - AOCI Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 15,327	$ 13,676
OCI, net of tax	(37)	992	$ (3,969)
Ending balance	16,447	15,327	13,676
Net Unrealized Gain (Loss) on Fixed Maturities, AFS
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(1,482)	(2,594)	1,631
OCI, before Reclassifications, before Tax, Attributable to Parent	(241)	1,275	(5,630)
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent	(169)	(133)	(282)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(72)	1,408	(5,348)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	15	(296)	1,123
OCI, net of tax	(57)	1,112	(4,225)
Ending balance	(1,539)	(1,482)	(2,594)
AOCI, Gain (Loss), Debt Securities, Available-for-sale, with Allowance for Credit Loss, Parent
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(8)	(7)	(2)
OCI, before Reclassifications, before Tax, Attributable to Parent	2	(5)	(6)
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent	(1)	(4)	0
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	3	(1)	(6)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	(1)	0	1
OCI, net of tax	2	(1)	(5)
Ending balance	(6)	(8)	(7)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	21	40	6
OCI, before Reclassifications, before Tax, Attributable to Parent	27	(25)	56
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent	3	(1)	13
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	24	(24)	43
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	(5)	5	(9)
OCI, net of tax	19	(19)	34
Ending balance	40	21	40
Foreign Currency Translation Adjustments
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	37	31	41
OCI, before Reclassifications, before Tax, Attributable to Parent	(10)	8	(13)
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent	0	0	0
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(10)	8	(13)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	2	(2)	3
OCI, net of tax	(8)	6	(10)
Ending balance	29	37	31
AOCI, Liability for Future Policy Benefit, Parent
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	25	35	(59)
OCI, before Reclassifications, before Tax, Attributable to Parent	10	(13)	119
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent	0	0	0
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	10	(13)	119
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	(2)	3	(25)
OCI, net of tax	8	(10)	94
Ending balance	33	25	35
Pension and Other Postretirement Plan Adjustments
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(1,442)	(1,346)	(1,489)
OCI, before Reclassifications, before Tax, Attributable to Parent	(34)	(148)	119
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent	(32)	(27)	(62)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(2)	(121)	181
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	1	25	(38)
OCI, net of tax	(1)	(96)	143
Ending balance	(1,443)	(1,442)	(1,346)
AOCI, net of tax
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(2,849)	(3,841)	128
OCI, before Reclassifications, before Tax, Attributable to Parent	(246)	1,092	(5,355)
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent	(199)	(165)	(331)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(47)	1,257	(5,024)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	10	(265)	1,055
OCI, net of tax	(37)	992	(3,969)
Ending balance	$ (2,886)	$ (2,849)	$ (3,841)

Changes in and Reclassificati_4

Changes in and Reclassifications From Accumulated Other Comprehensive Income (Loss) - Reclassification from AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net realized losses	$ (61)	$ (188)	$ (627)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	3,849	3,088	2,262
Income tax expense	738	584	443
Net investment income	2,568	2,305	2,177
Interest Expense	199	199	213
Net income (loss)	3,111	2,504	1,819
Amount Reclassified from AOCI
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net income (loss)	(158)	(136)	(262)
Net Unrealized Gain (Loss) on Fixed Maturities, AFS | Amount Reclassified from AOCI
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net realized losses	(169)	(133)	(282)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(169)	(133)	(282)
Income tax expense	(35)	(28)	(59)
Net income (loss)	(134)	(105)	(223)
AOCI, Gain (Loss), Debt Securities, Available-for-sale, with Allowance for Credit Loss, Parent | Amount Reclassified from AOCI
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net realized losses	(1)	(4)	0
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(1)	(4)	0
Income tax expense	0	(1)	0
Net income (loss)	(1)	(3)	0
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent | Amount Reclassified from AOCI
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	3	(1)	13
Income tax expense	1	0	3
Net income (loss)	2	(1)	10
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent | Amount Reclassified from AOCI | Interest rate swaps
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net investment income	(25)	(26)	6
Interest Expense	16	15	(2)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent | Amount Reclassified from AOCI | Foreign currency swaps
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net investment income	12	10	9
Amortization of prior service credit | Amount Reclassified from AOCI
Accumulated Other Comprehensive Income (Loss) [Line Items]
Insurance operating costs and other expenses	7	7	7
Amortization of actuarial loss | Amount Reclassified from AOCI
Accumulated Other Comprehensive Income (Loss) [Line Items]
Insurance operating costs and other expenses	(39)	(34)	(69)
Pension and Other Postretirement Plan Adjustments | Amount Reclassified from AOCI
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(32)	(27)	(62)
Income tax expense	(7)	0	(13)
Net income (loss)	$ (25)	$ (27)	$ (49)

Employee Benefit Plans - Assump

Employee Benefit Plans - Assumptions Used in Calculating the Benefit Obligations and the Net Amount Recognized (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Health Care Cost Trend Rate Assumed for Pre Retirement	6.50%	8%	7%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	4%	4.50%	4.50%
Year that the rate reaches the ultimate trend rate	2045	2038	2032
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	5.65%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	5.90%	6.10%
Other Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	5.59%	5.14%	5.40%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	5.13%	5.40%	2.83%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	4%	4.40%	3.30%
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	5.56%	5.13%	5.39%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Weighted-Average Interest Crediting Rate	4.30%	4.36%	3.89%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	5.13%	5.39%	2.72%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	4.50%	4.50%	4.80%
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	5.65%	5.15%	5.43%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	5.15%	5.43%	2.91%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	5.90%	6.10%	5.10%

Employee Benefit Plans - Schedu

Employee Benefit Plans - Schedule of Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pension Plan [Member]
schedule of net funded status [Line Items]
Defined Benefit Plan, Benefit Obligation, Beginning Balance	$ 3,603	$ 3,490
Service cost	2	3	$ 4
Interest cost	176	180	111
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant	0	0
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	7	(40)
Defined Benefit Plan, Changes in Assumptions	(158)	108
Defined Benefit Plan, Benefit Obligation, Benefits Paid	228	218
Defined Benefit Plan, Benefit Obligation, Ending Balance	3,388	3,603	3,490
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	3,573	3,524
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	34	254
Defined Benefit Plan, Plan Assets, Contributions by Employer	0	1
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant	0	0
Defined Benefit Plan, Plan Assets, Benefits Paid	202	192
Defined Benefit Plan, Plan Assets, Administration Expense	8	14
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)	(1)	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	3,396	3,573	3,524
Defined Benefit Plan, Funded (Unfunded) Status of Plan	8	(30)
Assets for Plan Benefits, Defined Benefit Plan	312	293
Liability, Defined Benefit Plan	304	323
Other Pension Plan
schedule of net funded status [Line Items]
Defined Benefit Plan, Benefit Obligation, Beginning Balance	334	334
Service cost	0	0
Interest cost	16	17
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant	0	0
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(2)	(2)
Defined Benefit Plan, Changes in Assumptions	(12)	8
Defined Benefit Plan, Benefit Obligation, Benefits Paid	27	27
Defined Benefit Plan, Benefit Obligation, Ending Balance	313	334	334
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	11	11
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	0	0
Defined Benefit Plan, Plan Assets, Contributions by Employer	0	1
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant	0	0
Defined Benefit Plan, Plan Assets, Benefits Paid	1	1
Defined Benefit Plan, Plan Assets, Administration Expense	0	0
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)	(1)	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	9	11	11
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(304)	(323)
Assets for Plan Benefits, Defined Benefit Plan	0	0
Liability, Defined Benefit Plan	304	323
Other Postretirement Benefits Plan [Member]
schedule of net funded status [Line Items]
Defined Benefit Plan, Benefit Obligation, Beginning Balance	138	143
Service cost	0	0	0
Interest cost	7	7	4
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant	7	8
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	3	(3)
Defined Benefit Plan, Changes in Assumptions	(4)	3
Defined Benefit Plan, Benefit Obligation, Benefits Paid	23	26
Defined Benefit Plan, Benefit Obligation, Ending Balance	122	138	143
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	18	30
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	0	1
Defined Benefit Plan, Plan Assets, Contributions by Employer	6	5
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant	7	8
Defined Benefit Plan, Plan Assets, Benefits Paid	23	26
Defined Benefit Plan, Plan Assets, Administration Expense	0	0
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)	0	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	8	18	30
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(114)	(120)
Assets for Plan Benefits, Defined Benefit Plan	0	0
Liability, Defined Benefit Plan	114	120
UNITED STATES | Pension Plan [Member]
schedule of net funded status [Line Items]
Defined Benefit Plan, Benefit Obligation, Beginning Balance	3,269	3,156
Service cost	2	3
Interest cost	160	163
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant	0	0
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	9	(38)
Defined Benefit Plan, Changes in Assumptions	(146)	100
Defined Benefit Plan, Benefit Obligation, Benefits Paid	201	191
Defined Benefit Plan, Benefit Obligation, Ending Balance	3,075	3,269	3,156
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	3,562	3,513
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	34	254
Defined Benefit Plan, Plan Assets, Contributions by Employer	0	0
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant	0	0
Defined Benefit Plan, Plan Assets, Benefits Paid	201	191
Defined Benefit Plan, Plan Assets, Administration Expense	8	14
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)	0	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	3,387	3,562	$ 3,513
Defined Benefit Plan, Funded (Unfunded) Status of Plan	312	293
Assets for Plan Benefits, Defined Benefit Plan	312	293
Liability, Defined Benefit Plan	$ 0	$ 0

Employee Benefit Plans - Net Pe

Employee Benefit Plans - Net Periodic Benefits Cost and Other Recognized in the OCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pension Plan [Member]
Defined Benefit Plan, Net Periodic Cost (Benefit)
Service cost	$ (2)	$ (3)	$ (4)
Interest cost	176	180	111
Expected return on plan assets	(230)	(235)	(202)
Amortization of prior service credit	0	0	0
Amortization of actuarial loss	34	29	62
Net periodic cost (benefit)	(18)	(23)	(25)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss)
Amortization of actuarial loss	34	29	62
Amortization of prior service credit	0	0	0
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	(41)	(142)	89
Prior service cost	0	0	0
Total	(7)	(113)	151
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]
Net loss	(1,784)	(1,777)	(1,664)
Prior service credit	0	0	0
Total	(1,784)	(1,777)	(1,664)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Net Periodic Cost (Benefit)
Service cost	0	0	0
Interest cost	7	7	4
Expected return on plan assets	(1)	(1)	(2)
Amortization of prior service credit	(7)	(7)	(7)
Amortization of actuarial loss	5	5	7
Net periodic cost (benefit)	4	4	2
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss)
Amortization of actuarial loss	5	5	7
Amortization of prior service credit	(7)	(7)	(7)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	7	(6)	30
Prior service cost	0	0	0
Total	5	(8)	30
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]
Net loss	(76)	(88)	(87)
Prior service credit	33	40	47
Total	$ (43)	$ (48)	$ (40)

Employee Benefit Plans - Define

Employee Benefit Plans - Defined Benefit Plan, Information about Plan Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	$ 3,573	$ 3,524
Defined Benefit Plan, Fair Value of Plan Assets, Excluded Investment Payables	49	46
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	3,573	3,524
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	3,396	3,573
Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	198
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	198
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	186	198
Pension Plan [Member] | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	2,313
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	2,313
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	2,209	2,313
Pension Plan [Member] | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	190	198
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	190	198
Realized gains, net	0	(3)
Changes in unrealized gains (losses), net	0	9
Purchases	5	13
Sales	(21)	(30)
Transfers into Level 3 [2]	0	5
Transfers out of Level 3 [2]	0	(2)
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	174	190
Pension Plan [Member] | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	3,527
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	3,527
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	3,347	3,527
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	18	30
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	18	30
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	8	18
Other Postretirement Benefits Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	16
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	16
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	8	16
Other Postretirement Benefits Plan [Member] | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	2
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	2
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	0	2
Other Postretirement Benefits Plan [Member] | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	$ 0	$ 0
Equity Securities [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	19%
Fixed income securities | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	81%
Fixed income securities | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	100%	100%
Short-term Investments [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	$ 187
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	187
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	164	$ 187
Short-term Investments [Member] | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	187
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	187
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	164	187
Short-term Investments [Member] | Pension Plan [Member] | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	0	0
Short-term Investments [Member] | Pension Plan [Member] | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	0	0
Short-term Investments [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	16
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	16
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	8	16
Short-term Investments [Member] | Other Postretirement Benefits Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	16
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	16
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	8	16
Short-term Investments [Member] | Other Postretirement Benefits Plan [Member] | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	0	0
Short-term Investments [Member] | Other Postretirement Benefits Plan [Member] | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	0	0
Corporate | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	1,679
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	1,679
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	1,619	1,679
Corporate | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	0	0
Corporate | Pension Plan [Member] | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	1,643
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	1,643
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	1,586	1,643
Corporate | Pension Plan [Member] | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	36	31
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	36	31
Realized gains, net	0	0
Changes in unrealized gains (losses), net	0	2
Purchases	5	0
Sales	(8)	0
Transfers into Level 3 [2]	0	5
Transfers out of Level 3 [2]	0	(2)
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	33	36
Residential mortgage-backed securities ("RMBS") | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	111
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	111
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	105	111
Residential mortgage-backed securities ("RMBS") | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	0	0
Residential mortgage-backed securities ("RMBS") | Pension Plan [Member] | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	111
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	111
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	105	111
Residential mortgage-backed securities ("RMBS") | Pension Plan [Member] | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	0	0
U.S. Treasuries | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	271
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	271
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	286	271
U.S. Treasuries | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	8	0
U.S. Treasuries | Pension Plan [Member] | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	271
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	271
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	278	271
U.S. Treasuries | Pension Plan [Member] | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	0	0
U.S. Treasuries | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	2
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	2
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	0	2
U.S. Treasuries | Other Postretirement Benefits Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	0	0
U.S. Treasuries | Other Postretirement Benefits Plan [Member] | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	2
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	2
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	0	2
U.S. Treasuries | Other Postretirement Benefits Plan [Member] | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	0	0
Foreign government/government agencies | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	21
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	21
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	18	21
Foreign government/government agencies | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	0	0
Foreign government/government agencies | Pension Plan [Member] | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	11
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	11
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	9	11
Foreign government/government agencies | Pension Plan [Member] | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	10	1
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	10	1
Realized gains, net	0	0
Changes in unrealized gains (losses), net	(1)	(1)
Purchases	0	10
Sales	0	0
Transfers into Level 3 [2]	0	0
Transfers out of Level 3 [2]	0	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	9	10
CMBS | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	50
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	50
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	29	50
CMBS | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	0	0
CMBS | Pension Plan [Member] | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	49
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	49
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	28	49
CMBS | Pension Plan [Member] | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	1
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	1
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	1	1
Other Fixed Income [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	160
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	160
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	162	160
Other Fixed Income [Member] | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	0	0
Other Fixed Income [Member] | Pension Plan [Member] | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	160
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	160
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	162	160
Other Fixed Income [Member] | Pension Plan [Member] | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	0	0
Mortgage loans | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	143
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	143
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	131	143
Mortgage loans | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	0	0
Mortgage loans | Pension Plan [Member] | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	0	0
Mortgage loans | Pension Plan [Member] | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	143	165
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	143	165
Realized gains, net	0	(3)
Changes in unrealized gains (losses), net	1	8
Purchases	0	3
Sales	(13)	(30)
Transfers into Level 3 [2]	0	0
Transfers out of Level 3 [2]	0	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	131	143
Domestic | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	34
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	34
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	18	34
Domestic | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	11
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	11
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	14	11
Domestic | Pension Plan [Member] | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	23
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	23
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	4	23
Domestic | Pension Plan [Member] | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	0	0
International | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	45
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	45
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	37	45
International | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	0	0
International | Pension Plan [Member] | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	45
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	45
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	37	45
International | Pension Plan [Member] | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	0	0
Total pension plan assets at fair value, in the fair value hierarchy | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	2,701
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	2,701
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	2,569	2,701
Total pension plan assets at fair value, in the fair value hierarchy | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	198
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	198
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	186	198
Total pension plan assets at fair value, in the fair value hierarchy | Pension Plan [Member] | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	2,313
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	2,313
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	2,209	2,313
Total pension plan assets at fair value, in the fair value hierarchy | Pension Plan [Member] | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	190
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	190
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	174	190
Limited partnerships | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	826
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	826
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	778	826
Other investments | Pension Plan [Member] | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	1	1
Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	1	1
Realized gains, net	0	0
Changes in unrealized gains (losses), net	0	0
Purchases	0	0
Sales	0	0
Transfers into Level 3 [2]	0	0
Transfers out of Level 3 [2]	0	0
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	$ 1	$ 1
Minimum | Equity Securities [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	0%
Minimum | Equity Securities [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	0%
Minimum | Fixed income securities | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	75%
Minimum | Fixed income securities | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	100%
Minimum | Limited partnerships | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	0%
Minimum | Limited partnerships | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	0%
Maximum | Equity Securities [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	20%
Maximum | Equity Securities [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	0%
Maximum | Fixed income securities | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	95%
Maximum | Fixed income securities | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	100%
Maximum | Limited partnerships | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	25%
Maximum | Limited partnerships | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	0%

Employee Benefit Plans - Expect

Employee Benefit Plans - Expected Employer Contributions (Details)	12 Months Ended
	Dec. 31, 2024
Retirement Benefits [Abstract]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year, Description	The Company does not have a 2025 required minimum funding contribution for the U.S. qualified defined benefit pension plan. The Company has not determined whether, and to what extent, contributions may be made to the U.S. qualified defined benefit pension plan in 2025.

Employee Benefit Plans - Benefi

Employee Benefit Plans - Benefit Payments (Details) $ in Millions	Dec. 31, 2024 USD ($)
Pension Benefits
Defined Benefit Plan, Expected Future Benefit Payments [Abstract]
2025	$ 249
2026	256
2027	261
2028	267
2029	262
2030 - 2034	1,304
Total	2,599
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Expected Future Benefit Payments [Abstract]
2025	15
2026	13
2027	12
2028	11
2029	11
2030 - 2034	46
Total	$ 108

Employee Benefit Plans - Post R

Employee Benefit Plans - Post Retirement Benefit Plans, Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Maximum percentage of plan assets that can be in the common stock of Hartford		10%
Non-elective contribution percent		2%
Percent of employer matching contribution		6%
Limit of employee compensation annually		$ 1,000,000
Total cost to company related to Investment and Savings Plan		$ 193,000,000	$ 163,000,000	$ 142,000,000
Defined Benefit Plan, Assumptions Used in Calculation, Description		The interest crediting rate on the cash balance plan is the greater of the average annual yield on 10-year U.S. Treasury Securities published in December of the prior calendar year or 3.3%.
Fair value of plan assets had fair value of rabbi trusts been included		$ 3,641,000,000	3,771,000,000
Funded status of plan had fair value of rabbi trust assets been included		$ 253,000,000	$ 168,000,000
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		5.65%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets		5.90%	6.10%
Defined Benefit Plan, Benefit Obligation		$ 3,388,000,000	$ 3,603,000,000	3,490,000,000
Assets held in rabbi trusts and designated for the non-qualified pension plans		245,000,000	198,000,000
Assets held in rabbi trusts and designated for non qualified pension plans, contributions by employer		0	3,000,000
Plan assets at fair value in the fair value hierarchy		$ 3,396,000,000	3,573,000,000	$ 3,524,000,000
Pension Plan [Member] | Forecast [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.40%
Pension Plan [Member] | Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		81%
Pension Plan [Member] | Fixed income securities | Forecast [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	81%
Pension Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		19%
Pension Plan [Member] | Equity Securities [Member] | Forecast [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	19%
Pension Plan [Member] | Defined Benefit Plan, Equity Securities, Common Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value in the fair value hierarchy		$ 1,000,000	$ 1,000,000
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		5.56%	5.13%	5.39%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets		4.50%	4.50%	4.80%
Defined Benefit Plan, Benefit Obligation		$ 122,000,000	$ 138,000,000	$ 143,000,000
Plan assets at fair value in the fair value hierarchy		$ 8,000,000	$ 18,000,000	$ 30,000,000
Other Postretirement Benefits Plan [Member] | Forecast [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	4.80%
Other Postretirement Benefits Plan [Member] | Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		100%	100%
Other Postretirement Benefits Plan [Member] | Fixed income securities | Forecast [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	100%
Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Equity Securities, Common Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value in the fair value hierarchy		$ 0	$ 0
Other Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		5.59%	5.14%	5.40%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets		4%	4.40%	3.30%
Defined Benefit Plan, Benefit Obligation		$ 313,000,000	$ 334,000,000	$ 334,000,000
Plan assets at fair value in the fair value hierarchy		$ 9,000,000	$ 11,000,000	$ 11,000,000
Other Pension Plan | Change in Assumptions for Defined Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		5.59%	5.14%	5.40%
Defined Benefit Plan, Benefit Obligation, Period Increase (Decrease)		$ (12,000,000)	$ (7,000,000)
Cash Balance Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation		332,000,000	357,000,000
Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Total cost to company related to Investment and Savings Plan		$ 3,000,000	$ 3,000,000	$ 3,000,000
UNITED STATES | Change in Assumptions for Defined Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		5.65%	5.15%	5.43%
Defined Benefit Plan, Benefit Obligation, Period Increase (Decrease)		$ (145,000,000)	$ (88,000,000)
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		5.65%	5.15%	5.43%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets		5.90%	6.10%	5.10%
Defined Benefit Plan, Benefit Obligation		$ 3,075,000,000	$ 3,269,000,000	$ 3,156,000,000
Plan assets at fair value in the fair value hierarchy		$ 3,387,000,000	$ 3,562,000,000	$ 3,513,000,000

Stock Compensation Plans - Stoc

Stock Compensation Plans - Stock Compensation Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Stock-based compensation plans expense	$ 133	$ 125	$ 131
Income tax benefit	(21)	(22)	(22)
Excess tax benefit on awards vested, exercised and expired	(21)	(12)	(12)
Total stock-based compensation plans expense, after-tax	$ 91	$ 91	$ 97

Stock Compensation Plans - St_2

Stock Compensation Plans - Stock Option Awards (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Number of Options (in thousands)
Outstanding at beginning of year (in shares)	6,071
Granted (in shares)	270
Exercised (in shares)	(1,823)
Forfeited (in shares)	0
Expired (in shares)	0
Outstanding at end of year (in shares)	4,518	6,071
Number of Options (in thousands), Outstanding, fully vested and expected to vest (in shares)	4,494
Number of Options (in thousands), Exercisable at end of year (in shares)	3,711
Weighted Average Exercise Price
Outstanding at beginning of year (in USD per share)	$ 55.92
Granted (in USD per share)	95.74
Exercised (in USD per share)	50.45
Forfeited (in USD per share)	0
Expired (in USD per share)	0
Outstanding at end of year (in USD per share)	60.51	$ 55.92
Weighted Average Exercise Price, Outstanding, fully vested and expected to vest (in USD per share)	60.40
Weighted Average Exercise Price, Exercisable at end of year (in USD per share)	$ 55.85
Weighted Average Remaining Contractual Term, Outstanding at end of year	5 years 4 months 24 days
Weighted Average Remaining Contractual Term, Outstanding, fully vested and expected to vest	5 years 4 months 24 days
Weighted Average Remaining Contractual Term, Exercisable at end of year	4 years 9 months 18 days
Aggregate Intrinsic Value, Outstanding at end of year	$ 221
Aggregate Intrinsic Value, Outstanding, fully vested and expected to vest	221
Aggregate Intrinsic Value, Exercisable at end of year	$ 199
Employee Stock Option
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]
Expected dividend yield	1.80%	2%	2.30%
Expected annualized spot volatility minimum	19.20%	24.50%	28.30%
Expected annualized spot volatility maximum	22.70%	26%	29.60%
Weighted average annualized volatility	21.70%	25.40%	28.80%
Risk-free spot rate minimum	4.30%	3.80%	(0.04%)
Risk-free spot rate maximum	5.50%	5.10%	2%
Expected term	7 years 4 months 24 days	6 years 8 months 12 days	6 years 4 months 24 days

Stock Compensation Plans - Perf

Stock Compensation Plans - Performance Shares (Details) - Performance Shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility of common stock	21.70%	33%	35.90%
Average correlation coefficient of peer companies	42%	52%	68%
Term	3 years	3 years	3 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	4.40%	4.40%	1.80%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average volatility of peer companies	20%	26%	27%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average volatility of peer companies	33%	41%	46%

Stock Compensation Plans - Tota

Stock Compensation Plans - Total Share Awards (Details) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Restricted Stock Units
Number of Shares (in thousands)
Non-vested at beginning of year (in shares)	3,259
Granted (in shares)	837
Vested (in shares)	(1,281)
Forfeited (in shares)	(137)
Non-vested at end of year (in shares)	2,678	3,259
Weighted-Average Grant-Date Fair Value
Non-vested at beginning of year (in USD per share)	$ 65.44
Granted (in USD per share)	96.34	$ 77.72	$ 69.32
Vested (in USD per share)	53.09
Forfeited (in USD per share)	77.97
Non-vested at end of year (in USD per share)	$ 80.36	$ 65.44
Performance Shares
Number of Shares (in thousands)
Non-vested at beginning of year (in shares)	583
Granted (in shares)	338
Performance based adjustment (in shares)	252
Vested (in shares)	(567)
Forfeited (in shares)	(12)
Non-vested at end of year (in shares)	594	583
Weighted-Average Grant-Date Fair Value
Non-vested at beginning of year (in USD per share)	$ 77.97
Granted (in USD per share)	103.08	$ 85.69	$ 71.54
Performance based adjustment (in USD per share)	71
Vested (in USD per share)	71.30
Forfeited (in USD per share)	88.19
Non-vested at end of year (in USD per share)	$ 95.49	$ 77.97

Stock Compensation Plans - Addi

Stock Compensation Plans - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 75
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	2 years
Maximum number of shares that may be issued (in shares)	15,400,000
Shares available for future issuance (in shares)	3,014,109
Award vesting period	3 years
Weighted average grant-date fair value of options granted during period (in shares)	$ 25.77	$ 21.09	$ 16.56
Proceeds from Stock Options Exercised	$ 92	$ 47	$ 26
Share-based Payment Arrangement, Exercise of Option, Tax Benefit	4	3	3
Total intrinsic value of options exercised during period	99	35	24
Share-based Payment Arrangement, Cash Used to Settle Award	0	0	0
Stock-based compensation plans expense	$ 133	$ 125	$ 131
Discount rate for employee stock purchase plan	5%
Shares sold during period (in shares)	141,500	194,561	194,504
Share-based Compensation Arrangement by Share-based Payment Award, Cash Received from Shares Issued in Period	$ 14	$ 13	$ 13
Subsidiary Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation plans expense	12	12	13
Subsidiary stock repurchased	$ 10	$ 11	$ 10
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term	3 years	3 years	3 years
Award vesting period	3 years
Stock-based Compensation Arrangement by Share-based Payment Award, Performance Period	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	594,000	583,000
Weighted average grant-date fair value (in USD per share)	$ 103.08	$ 85.69	$ 71.54
Total fair value of shares vested during period	$ 186	$ 154	$ 134
Performance Shares | Dividend Equivalent Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	14,000	18,000
Performance Shares | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target performance ratio	200%
Performance Shares | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target performance ratio	0%
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	2,678,000	3,259,000
Weighted average grant-date fair value (in USD per share)	$ 96.34	$ 77.72	$ 69.32
Restricted Stock Units | Dividend Equivalent Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	107,000	155,000
The Hartford 2020 Incentive Stock Plan (ISOP) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term	10 years
Maximum number of shares that may be issued (in shares)	11,250,000
Shares available for future issuance (in shares)	6,253,061
The Hartford 2020 Incentive Stock Plan (ISOP) [Member] | Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Service period	1 year
The Hartford 2020 Incentive Stock Plan (ISOP) [Member] | Employee Stock Option | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term	10 years

Leases Components of Lease Expe

Leases Components of Lease Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Operating lease cost	$ 35	$ 36	$ 40
Short-term lease cost	1	0	0
Variable lease cost	1	(2)	0
Sublease income	(3)	(4)	(4)
Total lease costs included in insurance operating costs and other expenses	$ 34	$ 30	$ 36

Leases Supplemental Operating L

Leases Supplemental Operating Lease Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Operating cash flows for operating leases (for the nine months ended)	$ 33	$ 37	$ 56
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 25	$ 40	$ 6
Weighted-average remaining lease term in years for operating leases	6 years	7 years	6 years
Weighted-average discount rate for operating leases	4.30%	4%	3%

Leases Maturities of Operating

Leases Maturities of Operating Lease Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Leases [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Rolling Twelve Months	$ 31
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Two	29
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Three	27
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Four	23
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Five	19
Lessee, Operating Lease, Liability, Payments, Due after Rolling Year Five	40
Lessee, Operating Lease, Liability, to be Paid	169
Less: Discount on lease payments to present value	24
Total lease liability	$ 145	$ 144

Leases Additional Information (

Leases Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 140	$ 141
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, Plant and Equipment, Net	Property, Plant and Equipment, Net
Total lease liability	$ 145	$ 144
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Other liabilities	Other liabilities
Variable lease cost	$ 1	$ (2)	$ 0
Hartford Next Program
Lessee, Lease, Description [Line Items]
Variable lease cost	$ 0	$ 0	$ 6

Restructuring and Other Costs,

Restructuring and Other Costs, Before Tax (Details) - USD ($) $ in Millions	12 Months Ended			54 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2024
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs	$ 2	$ 6	$ 13
Hartford Next Program
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs	2	6	13	$ 127
Restructuring and Related Cost, Expected Cost	127			127
Employee Severance | Hartford Next Program
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs	0	(6)	(7)	35
Restructuring and Related Cost, Expected Cost	35			35
Restructuring Reserve, Period Increase (Decrease)		6	7
Information Technology | Hartford Next Program
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs	0	5	8	25
Restructuring and Related Cost, Expected Cost	25			25
Professional fees and other expenses | Hartford Next Program
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs	2	$ 7	$ 12	67
Restructuring and Related Cost, Expected Cost	$ 67			$ 67

Accrued Restructuring and Other

Accrued Restructuring and Other Costs (Details) - USD ($) $ in Millions	12 Months Ended			54 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2024
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs	$ 2	$ 6	$ 13
Hartford Next Program
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs	2	6	13	$ 127
Payments for Restructuring	(2)	(13)
Employee Severance | Hartford Next Program
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs	0	(6)	(7)	35
Payments for Restructuring	0	(1)
Information Technology | Hartford Next Program
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs	0	5	8	25
Payments for Restructuring	0	(5)
Professional fees and other expenses | Hartford Next Program
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs	2	7	12	67
Payments for Restructuring	(2)	(7)
Other liabilities | Hartford Next Program
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance	0	7
Restructuring Reserve, Ending Balance	0	0	7	0
Other liabilities | Employee Severance | Hartford Next Program
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance	0	7
Restructuring Reserve, Ending Balance	0	0	7	0
Other liabilities | Information Technology | Hartford Next Program
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance	0	0
Restructuring Reserve, Ending Balance	0	0	0	0
Other liabilities | Professional fees and other expenses | Hartford Next Program
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance	0	0
Restructuring Reserve, Ending Balance	$ 0	$ 0	$ 0	$ 0

Restructuring and Related Act_3

Restructuring and Related Activities (Details) - USD ($) $ in Millions	12 Months Ended			54 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2024
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs	$ 2	$ 6	$ 13
Hartford Next Program
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs	2	6	13	$ 127
Payments for Restructuring	(2)	(13)
Restructuring and Related Cost, Expected Cost	127			127
Hartford Next Program | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs	0	(6)	(7)	35
Payments for Restructuring	0	(1)
Restructuring Reserve, Period Increase (Decrease)		6	7
Restructuring and Related Cost, Expected Cost	35			35
Hartford Next Program | Information Technology
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs	0	5	8	25
Payments for Restructuring	0	(5)
Restructuring and Related Cost, Expected Cost	25			25
Hartford Next Program | Professional fees and other expenses
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs	2	7	12	67
Payments for Restructuring	(2)	(7)
Restructuring and Related Cost, Expected Cost	67			67
Hartford Next Program | Other liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	0	0	7	0
Hartford Next Program | Other liabilities | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	0	0	7	0
Hartford Next Program | Other liabilities | Information Technology
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	0	0	0	0
Hartford Next Program | Other liabilities | Professional fees and other expenses
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 0	$ 0	$ 0	$ 0

Subsequent Events (Details)

Subsequent Events (Details) - 2025 CA Wildfires - Subsequent Event [Member] $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($)
Minimum [Member]
Subsequent Events [Abstract]
Current Year Claims and Claims Adjustment Expense	$ 300
Subsequent Event [Line Items]
Current Year Claims and Claims Adjustment Expense	300
Maximum
Subsequent Events [Abstract]
Current Year Claims and Claims Adjustment Expense	350
Subsequent Event [Line Items]
Current Year Claims and Claims Adjustment Expense	$ 350

Schedule I Summary of Investm_2

Schedule I Summary of Investments - Other Than Investments in Affiliates (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	$ 61,218
Amount at which shown on Balance Sheet	59,210
Commercial Loan [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Financing Receivable, Allowance for Credit Loss	44	$ 51	$ 36	$ 29
U.S. government and government agencies and authorities (guaranteed and sponsored)
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	5,424
Fair Value	4,937
Amount at which shown on Balance Sheet	4,937
States, municipalities and political subdivisions
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	5,574
Fair Value	5,304
Amount at which shown on Balance Sheet	5,304
Foreign government/government agencies
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	500
Fair Value	480
Amount at which shown on Balance Sheet	480
Public utilities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	2,464
Fair Value	2,305
Amount at which shown on Balance Sheet	2,305
All other corporate bonds
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	19,091
Fair Value	18,331
Amount at which shown on Balance Sheet	18,331
All other mortgage-backed and asset-backed securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	11,485
Fair Value	11,210
Amount at which shown on Balance Sheet	11,210
Total fixed maturities, available-for-sale
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	44,538
Fair Value	42,567
Amount at which shown on Balance Sheet	42,567
Fixed Income Securities, Fair Value Option [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	324
Fair Value	308
Amount at which shown on Balance Sheet	308
Industrial, miscellaneous and all other
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	384
Fair Value	438
Amount at which shown on Balance Sheet	438
Non-redeemable preferred stocks
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	170
Fair Value	165
Amount at which shown on Balance Sheet	165
Equity securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	554
Fair Value	603
Amount at which shown on Balance Sheet	603
Mortgage loans [2]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	6,440
Fair Value	5,901
Amount at which shown on Balance Sheet	6,396
Other investments
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	252
Fair Value	226
Amount at which shown on Balance Sheet	226
Short-term investments
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	4,068
Fair Value	4,068
Amount at which shown on Balance Sheet	4,068
Limited partnerships and other alternative investments [3]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	5,042
Amount at which shown on Balance Sheet	$ 5,042

Schedule II Condensed Financi_2

Schedule II Condensed Financial Information of the Hartford Financial Services, Inc. - Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Assets
Debt Securities, Available-for-sale, Amortized Cost	$ 44,538	$ 41,726
Total fixed maturities, AFS	42,567	39,818
Short-term investments	4,068	3,850
Cash	183	126
Deferred income taxes, net	1,229	1,173
Accrued Investment Income Receivable	450	404
Other assets	1,981	1,754
Total assets	$ 80,917	$ 76,780
Liabilities
Other Liability, Related and Nonrelated Party Status [Extensible Enumeration]	Affiliated Entity	Affiliated Entity
Other liabilities	$ 5,024	$ 5,052
Long-term debt	4,366	4,362
Total liabilities	64,470	61,453
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Preferred stock, $0.01 par value — 50,000,000 shares authorized, 13,800 shares issued at December 31, 2024 and December 31, 2023, aggregate liquidation preference of $345	334	334
Common Stock, Value, Issued	3	3
Additional Paid in Capital	578	648
Retained Earnings (Accumulated Deficit)	21,531	19,007
Treasury Stock, Value	(3,113)	(1,816)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(2,886)	(2,849)
Total stockholders' equity	16,447	15,327	$ 13,676
Total liabilities and stockholders’ equity	80,917	76,780
Parent Company
Assets
Debt Securities, Available-for-sale, Amortized Cost	24	29
Total fixed maturities, AFS	20	24
Short-term investments	1,290	1,040
Cash	0	0
Investment in affiliates	21,177	20,261
Deferred income taxes, net	432	439
Unamortized issue costs	1	2
Accrued Investment Income Receivable	1	0
Other assets	409	400
Total assets	23,330	22,166
Liabilities
Other liabilities	550	559
Long-term debt	4,366	4,362
Total liabilities	6,883	6,839
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Preferred stock, $0.01 par value — 50,000,000 shares authorized, 13,800 shares issued at December 31, 2024 and December 31, 2023, aggregate liquidation preference of $345	334	334
Common Stock, Value, Issued	3	3
Additional Paid in Capital	578	648
Retained Earnings (Accumulated Deficit)	21,531	19,007
Treasury Stock, Value	(3,113)	(1,816)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(2,886)	(2,849)
Total stockholders' equity	16,447	15,327
Total liabilities and stockholders’ equity	23,330	22,166
Parent Company | Affiliated Entity
Liabilities
Other liabilities	$ 1,967	$ 1,918

Schedule II Condensed Financi_3

Schedule II Condensed Financial Information of the Hartford Financial Services, Inc. - Statements of Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Consolidated Statements of Operations and Comprehensive Income
Net investment income	$ 2,568	$ 2,305	$ 2,177
Net realized gains	(61)	(188)	(627)
Revenues	26,535	24,527	22,362
Interest expense	199	199	213
Loss on extinguishment of debt	0	0	(9)
Insurance operating costs and other expenses	5,258	4,881	4,841
Benefits, losses and expenses	22,686	21,439	20,100
Income tax expense	738	584	443
Net income	3,111	2,504	1,819
Other comprehensive income (loss) - parent company:
Change in net gain on cash flow hedging instruments	19	(19)	34
OCI, net of tax	(37)	992	(3,969)
Comprehensive income (loss)	3,074	3,496	(2,150)
Parent Company
Consolidated Statements of Operations and Comprehensive Income
Net investment income	47	33	13
Net realized gains	4	0	0
Revenues	51	33	13
Interest expense	199	199	213
Loss on extinguishment of debt	0	0	(9)
Insurance operating costs and other expenses	(3)	7	(8)
Benefits, losses and expenses	196	206	214
Loss before income taxes and earnings of subsidiaries	(145)	(173)	(201)
Income tax expense	(44)	(67)	(61)
Loss before earnings of subsidiaries	(101)	(106)	(140)
Earnings of subsidiaries	3,212	2,610	1,959
Net income	3,111	2,504	1,819
Other comprehensive income (loss) - parent company:
Change in net gain on cash flow hedging instruments	(3)	(7)	45
Change in net unrealized gain or loss on fixed maturities	0	1	(4)
Change in pension and other postretirement plan adjustments	(5)	(89)	119
Other comprehensive income (loss), net of taxes before other comprehensive income of subsidiaries	(8)	(95)	160
Other comprehensive income (loss) of subsidiaries	(29)	1,087	(4,129)
OCI, net of tax	(37)	992	(3,969)
Comprehensive income (loss)	$ 3,074	$ 3,496	$ (2,150)

Schedule II Condensed Financi_4

Schedule II Condensed Financial Information of the Hartford Financial Services, Inc. - Cash Flow Disclosures (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating Activities
Net income	$ 3,111	$ 2,504	$ 1,819
Loss on extinguishment of debt	0	0	(9)
Gain (Loss) on Investments	61	188	627
Cash provided by operating activities	5,909	4,220	4,008
Investing Activities
Net proceeds from (payments for) short-term investments	(80)	(69)	(160)
Proceeds from Sale of Debt Securities, Available-for-sale	(10,808)	(6,806)	(14,996)
Equity securities at fair value	44	1,183	1,371
Payments for (Proceeds from) Other Investing Activities	(7)	(21)	4
Net cash used for investing activities	(3,768)	(2,431)	(1,277)
Financing Activities
Treasury stock acquired, including related excise tax paid	(1,514)	(1,400)	(1,550)
Dividends paid on common shares	(556)	(528)	(506)
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	21	21	21
Net cash used for financing activities	(2,076)	(1,947)	(2,710)
Cash and restricted cash — beginning of period	189	344	337
Cash and restricted cash — end of period	234	189	344
Parent Company
Operating Activities
Net income	3,111	2,504	1,819
Loss on extinguishment of debt	0	0	(9)
Dividends from subsidiaries	1,587	1,594	1,780
Equity in net income of subsidiaries	(3,212)	(2,610)	(1,959)
Gain (Loss) on Investments	(4)	0	0
Change in operating assets and liabilities	132	75	61
Cash provided by operating activities	1,614	1,563	1,710
Investing Activities
Net proceeds from (payments for) short-term investments	(250)	(208)	899
Proceeds from Sale of Debt Securities, Available-for-sale	(4)	(97)	(47)
Equity securities at fair value	0	0	5
Payments for (Proceeds from) Other Investing Activities	2	(8)	55
Capital returned from (contributions to) subsidiaries	704	503	(6)
Net cash used for investing activities	460	384	990
Financing Activities
Repayments of long-term debt	0	0	(600)
Treasury stock acquired, including related excise tax paid	(1,514)	(1,400)	(1,550)
Net issuance (return of) shares under incentive and stock compensation plans, including related excise tax benefit	22	6	(19)
Dividends paid on common shares	(561)	(532)	(510)
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	21	21	21
Net cash used for financing activities	(2,074)	(1,947)	(2,700)
Net increase (decrease) in cash	0	0	0
Cash and restricted cash — beginning of period	0	0	0
Cash and restricted cash — end of period	0	0	0
Supplemental Disclosure of Cash Flow Information
Interest Paid	$ 211	$ 209	$ 212

Schedule III Supplementary In_2

Schedule III Supplementary Insurance Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule of Supplementary Insurance Information [Abstract]
Deferred Policy Acquisition Costs	$ 1,239	$ 1,113
Unpaid Losses and Loss Adjustment Expenses	44,610	42,318
Reserve for Future Policy Benefits	448	484	$ 502
Unearned Premiums	9,408	8,599
Other Policyholder Funds and Benefits Payable	614	638
Earned Premiums, Fee Income and Other	24,028	22,410	20,812
Net Investment Income	2,568	2,305	2,177
Benefits, Losses and Loss Adjustment Expenses	14,874	14,238	13,138
Amortization of Deferred Policy Acquisition Costs	2,282	2,044	1,824
Insurance Operating Costs and Other Expenses	5,530	5,157	5,138
Net Written Premiums	16,949	15,477	14,119
Operating Segments
Schedule of Supplementary Insurance Information [Abstract]
Deferred Policy Acquisition Costs	1,239	1,113
Unpaid Losses and Loss Adjustment Expenses	44,610	42,318
Reserve for Future Policy Benefits	290	312
Unearned Premiums	9,408	8,599
Other Policyholder Funds and Benefits Payable	401	408
Earned Premiums, Fee Income and Other	23,986	22,369	20,762
Net Investment Income	2,505	2,258	2,151
Benefits, Losses and Loss Adjustment Expenses	14,866	14,231	13,130
Amortization of Deferred Policy Acquisition Costs	2,282	2,044	1,824
Insurance Operating Costs and Other Expenses	5,275	4,884	4,851
Net Written Premiums	16,949	15,477	14,119
Operating Segments | P&C Business Insurance [Member]
Schedule of Supplementary Insurance Information [Abstract]
Deferred Policy Acquisition Costs	1,093	976
Unpaid Losses and Loss Adjustment Expenses	31,381	29,181
Reserve for Future Policy Benefits	0	0
Unearned Premiums	7,638	6,977
Other Policyholder Funds and Benefits Payable	0	0
Earned Premiums, Fee Income and Other	12,765	11,683	10,609
Net Investment Income	1,714	1,532	1,415
Benefits, Losses and Loss Adjustment Expenses	7,441	6,786	6,169
Amortization of Deferred Policy Acquisition Costs	1,993	1,779	1,563
Insurance Operating Costs and Other Expenses	2,047	1,907	1,857
Net Written Premiums	13,351	12,279	11,158
Operating Segments | P&C Personal Insurance [Member]
Schedule of Supplementary Insurance Information [Abstract]
Deferred Policy Acquisition Costs	113	102
Unpaid Losses and Loss Adjustment Expenses	2,239	2,068
Reserve for Future Policy Benefits	0	0
Unearned Premiums	1,728	1,582
Other Policyholder Funds and Benefits Payable	0	0
Earned Premiums, Fee Income and Other	3,571	3,198	3,052
Net Investment Income	222	171	140
Benefits, Losses and Loss Adjustment Expenses	2,525	2,538	2,164
Amortization of Deferred Policy Acquisition Costs	255	231	228
Insurance Operating Costs and Other Expenses	742	638	652
Net Written Premiums	3,598	3,198	2,961
Operating Segments | Property & Casualty Other Operations [Member]
Schedule of Supplementary Insurance Information [Abstract]
Deferred Policy Acquisition Costs	0	0
Unpaid Losses and Loss Adjustment Expenses	2,784	2,795
Reserve for Future Policy Benefits	0	0
Unearned Premiums	2	2
Other Policyholder Funds and Benefits Payable	0	0
Earned Premiums, Fee Income and Other	0	0	0
Net Investment Income	74	69	63
Benefits, Losses and Loss Adjustment Expenses	219	224	280
Amortization of Deferred Policy Acquisition Costs	0	0	0
Insurance Operating Costs and Other Expenses	13	4	9
Net Written Premiums	0	0	0
Operating Segments | Employee Benefits [Member]
Schedule of Supplementary Insurance Information [Abstract]
Deferred Policy Acquisition Costs	33	35
Unpaid Losses and Loss Adjustment Expenses	8,206	8,274
Reserve for Future Policy Benefits	290	312
Unearned Premiums	40	38
Other Policyholder Funds and Benefits Payable	401	408
Earned Premiums, Fee Income and Other	6,615	6,515	6,057
Net Investment Income	475	469	524
Benefits, Losses and Loss Adjustment Expenses	4,681	4,683	4,517
Amortization of Deferred Policy Acquisition Costs	34	34	33
Insurance Operating Costs and Other Expenses	1,649	1,554	1,507
Net Written Premiums	0	0	0
Operating Segments | Hartford Funds
Schedule of Supplementary Insurance Information [Abstract]
Deferred Policy Acquisition Costs	0	0
Unpaid Losses and Loss Adjustment Expenses	0	0
Reserve for Future Policy Benefits	0	0
Unearned Premiums	0	0
Other Policyholder Funds and Benefits Payable	0	0
Earned Premiums, Fee Income and Other	1,035	973	1,044
Net Investment Income	20	17	9
Benefits, Losses and Loss Adjustment Expenses	0	0	0
Amortization of Deferred Policy Acquisition Costs	0	0	0
Insurance Operating Costs and Other Expenses	824	781	826
Net Written Premiums	0	0	0
Corporate
Schedule of Supplementary Insurance Information [Abstract]
Deferred Policy Acquisition Costs	0	0
Unpaid Losses and Loss Adjustment Expenses	0	0
Reserve for Future Policy Benefits	158	172
Unearned Premiums	0	0
Other Policyholder Funds and Benefits Payable	213	230
Earned Premiums, Fee Income and Other	42	41	50
Net Investment Income	63	47	26
Benefits, Losses and Loss Adjustment Expenses	8	7	8
Amortization of Deferred Policy Acquisition Costs	0	0	0
Insurance Operating Costs and Other Expenses	255	273	287
Net Written Premiums	$ 0	$ 0	$ 0

Schedule IV Reinsurance (Detail

Schedule IV Reinsurance (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Life insurance in-force
Gross Amount	$ 1,301,304	$ 1,275,984	$ 1,147,723
Ceded Amount	35,266	33,009	23,330
Assumed From Other Companies	25,362	23,605	22,511
Net Amount	$ 1,291,400	$ 1,266,580	$ 1,146,904
Percentage of Amount Assumed to Net	2%	2%	2%
Insurance revenues
Gross Amount	$ 23,491	$ 21,959	$ 20,316
Ceded Amount	1,869	1,716	1,568
Assumed From Other Companies	1,167	1,000	829
Premiums Earned, Net	$ 22,567	$ 21,026	$ 19,390
Percentage of Amount Assumed to Net	5%	5%	4%
Earned premiums and fees [Member]
Insurance revenues
Premiums Earned, Net	$ 22,789	$ 21,243	$ 19,577
Property and Casualty Insurance Products
Insurance revenues
Gross Amount	16,915	15,514	14,328
Ceded Amount	1,742	1,612	1,462
Assumed From Other Companies	1,001	826	654
Premiums Earned, Net	$ 16,174	$ 14,728	$ 13,520
Percentage of Amount Assumed to Net	6%	6%	5%
Life insurance and annuities
Insurance revenues
Gross Amount	$ 2,582	$ 2,540	$ 2,341
Ceded Amount	41	33	25
Assumed From Other Companies	76	76	77
Premiums Earned, Net	$ 2,617	$ 2,583	$ 2,393
Percentage of Amount Assumed to Net	3%	3%	3%
Accident and health insurance
Insurance revenues
Gross Amount	$ 3,994	$ 3,905	$ 3,647
Ceded Amount	86	71	81
Assumed From Other Companies	90	98	98
Premiums Earned, Net	$ 3,998	$ 3,932	$ 3,664
Percentage of Amount Assumed to Net	2%	2%	3%

Schedule V Valuation and Qual_2

Schedule V Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Jan. 01, 2023	Jan. 01, 2022	Jan. 01, 2021
SEC Schedule, 12-09, Allowance, Loss on Finance Receivable
Movement in Valuation allowance and reserves
Valuation allowances and reserves	$ 16	$ 21	$ 12	$ 21	$ 12	$ 1
Increase (decrease) in Costs and Expenses	2	14	18
Write-offs/ Payments/ Other	7	5	7
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	16	21	12	21	12	1
SEC Schedule, 12-09, Allowance, Loan and Lease Loss, Real Estate [Member]
Movement in Valuation allowance and reserves
Valuation allowances and reserves	44	51	36	51	36	29
Increase (decrease) in Costs and Expenses	(3)	15	7
Write-offs/ Payments/ Other	4	0	0
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	44	51	36	51	36	29
SEC Schedule, 12-09, Allowance, Uncollectible Premium Receivable
Movement in Valuation allowance and reserves
Valuation allowances and reserves	117	109	109	109	109	105
Increase (decrease) in Costs and Expenses	65	50	51
Write-offs/ Payments/ Other	57	50	47
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	117	109	109	109	109	105
SEC Schedule, 12-09, Allowance, Reinsurance Recoverable [Member]
Movement in Valuation allowance and reserves
Valuation allowances and reserves	75	103	105	103	105	99
Increase (decrease) in Costs and Expenses	(11)	14	3
Write-offs/ Payments/ Other	17	16	3
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	75	103	105	103	105	99
Valuation allowance for deferred taxes
Movement in Valuation allowance and reserves
Valuation allowances and reserves	0	12	27	12	27	7
Increase (decrease) in Costs and Expenses	0	0	20
Write-offs/ Payments/ Other	12	15	0
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	$ 0	$ 12	$ 27	$ 12	$ 27	$ 7