Loews (L) 10-Q4 Nov 242024 Q3 Quarterly reportFinancial data

Company Profile

COVER

COVER - shares	9 Months Ended
COVER - shares	Sep. 30, 2024	Nov. 01, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2024
Document Transition Report	false
Entity File Number	1-06541
Entity Registrant Name	LOEWS CORP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	13-2646102
Entity Address, Address Line One	9 West 57th Street
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10019-2714
City Area Code	212
Local Phone Number	521-2000
Title of 12(b) Security	Common stock, par value $0.01 per share
Trading Symbol	L
Security Exchange Name	NYSE
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
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		217,776,738
Entity Central Index Key	0000060086
Current Fiscal Year End Date	--12-31
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3

CONSOLIDATED CONDENSED BALANCE

CONSOLIDATED CONDENSED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Investments:
Fixed maturities, amortized cost of $44,028 and $42,615, less allowance for credit loss of $18 and $16	$ 43,055	$ 40,626
Equity securities, cost of $1,068 and $1,015	1,215	1,050
Limited partnership investments	2,462	2,174
Other invested assets, primarily mortgage loans, less allowance for credit loss of $35 and $35	1,095	1,123
Short-term investments	5,242	4,396
Total investments	53,069	49,369
Cash	548	399
Receivables	10,138	9,660
Property, plant and equipment	10,689	10,718
Goodwill	349	347
Deferred non-insurance warranty acquisition expenses	3,571	3,661
Deferred acquisition costs of insurance subsidiaries	943	896
Other assets	4,310	4,147
Total assets	83,617	79,197
Insurance reserves:
Claim and claim adjustment expense	24,558	23,304
Future policy benefits	14,047	13,959
Unearned premiums	7,259	6,933
Total insurance reserves	45,864	44,196
Payable to brokers	269	79
Short-term debt	713	1,084
Long-term debt	8,821	7,919
Deferred income taxes	697	398
Deferred non-insurance warranty revenue	4,594	4,694
Other liabilities	4,411	4,302
Total liabilities	65,369	62,672
Commitments and contingent liabilities
Shareholders' equity:
Preferred stock
Common stock	2	2
Additional paid-in capital	2,562	2,589
Retained earnings	16,802	15,617
Accumulated other comprehensive loss	(1,738)	(2,497)
Shareholders' equity before treasury stock, total	17,628	15,711
Less treasury stock, at cost (3,580,335 and 100,000 shares)	(271)	(7)
Total shareholders’ equity	17,357	15,704
Noncontrolling interests	891	821
Total equity	18,248	16,525
Total liabilities and equity	$ 83,617	$ 79,197

CONSOLIDATED CONDENSED BALANC_2

CONSOLIDATED CONDENSED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Investments:
Fixed maturities, amortized cost	$ 44,028	$ 42,615
Fixed maturities, allowance for credit loss	18	16
Equity securities, cost	1,068	1,015
Other invested assets, primarily mortgage loans, allowance for credit loss	$ 35	$ 35
Shareholders' equity:
Preferred stock, par value (in dollars per share)	$ 0.10	$ 0.10
Preferred stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,800,000,000	1,800,000,000
Common stock, shares issued (in shares)	222,511,465	222,268,150
Treasury stock, shares (in shares)	3,580,335	100,000

CONSOLIDATED CONDENSED STATEMEN

CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenues:
Insurance premiums	$ 2,593	$ 2,406	$ 7,532	$ 7,001
Net investment income	776	592	2,084	1,752
Investment losses	(10)	(38)	(42)	(59)
Non-insurance warranty revenue	401	407	1,212	1,221
Operating revenues and other	706	559	2,178	1,728
Total	4,466	3,926	12,964	11,643
Expenses:
Insurance claims and policyholders’ benefits (re-measurement loss of $(48), $(41), $(88) and $(75))	2,019	1,826	5,708	5,258
Amortization of deferred acquisition costs	457	426	1,336	1,208
Non-insurance warranty expense	387	386	1,169	1,154
Operating expenses and other	930	860	2,778	2,449
Equity method (income) loss	9	(22)	(44)	(89)
Interest	114	94	331	280
Total	3,916	3,570	11,278	10,260
Income before income tax	550	356	1,686	1,383
Income tax expense	(125)	(80)	(381)	(315)
Net income (loss)	425	276	1,305	1,068
Amounts attributable to noncontrolling interests	(24)	(23)	(78)	(80)
Net income (loss) attributable to Loews Corporation	$ 401	$ 253	$ 1,227	$ 988
Basic net income per share (in dollars per share)	$ 1.83	$ 1.12	$ 5.55	$ 4.32
Diluted net income per share (in dollars per share)	$ 1.82	$ 1.12	$ 5.54	$ 4.31
Weighted average shares outstanding:
Shares of common stock (in shares)	219,670	225,640	221,160	228,850
Dilutive potential shares of common stock (in shares)	270	350	270	310
Total weighted average shares outstanding assuming dilution (in shares)	219,940	225,990	221,430	229,160

CONSOLIDATED CONDENSED STATEM_2

CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Statement [Abstract]
Re-measurement impact of insurance claims and policyholders’ benefits	$ (48)	$ (41)	$ (88)	$ (75)

CONSOLIDATED CONDENSED STATEM_3

CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 425	$ 276	$ 1,305	$ 1,068
Other comprehensive income (loss), after tax
Net unrealized losses on investments with an allowance for credit losses	(3)	(1)	(1)	(10)
Net unrealized gains (losses) on other investments	1,264	(1,084)	803	(827)
Total unrealized gains (losses) on investments	1,261	(1,085)	802	(837)
Impact of changes in discount rates used to measure long-duration contract liabilities	(623)	818	(9)	678
Unrealized gains (losses) on cash flow hedges	(7)	(1)	(6)	5
Pension and postretirement benefits	9	40	21	55
Foreign currency translation	64	(55)	21	(4)
Other comprehensive income (loss)	704	(283)	829	(103)
Comprehensive income (loss)	1,129	(7)	2,134	965
Amounts attributable to noncontrolling interests	(83)	8	(148)	(69)
Total comprehensive income attributable to Loews Corporation	$ 1,046	$ 1	$ 1,986	$ 896

CONSOLIDATED CONDENSED STATEM_4

CONSOLIDATED CONDENSED STATEMENTS OF EQUITY (Unaudited) - USD ($) $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	As Reported	Common Stock	Common Stock As Reported	Additional Paid-in Capital	Additional Paid-in Capital As Reported	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings As Reported	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss) As Reported	Common Stock Held in Treasury	Common Stock Held in Treasury As Reported	Noncontrolling Interests	Noncontrolling Interests Cumulative Effect, Period of Adoption, Adjustment	Noncontrolling Interests As Reported
Balance at beginning of period at Dec. 31, 2022	$ 15,201	$ (277)	$ 15,478	$ 2	$ 2	$ 2,748	$ 2,748	$ 14,931	$ (213)	$ 15,144	$ (3,320)	$ (36)	$ (3,284)	$ (12)	$ (12)	$ 852	$ (28)	$ 880
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,068							988								80
Other comprehensive income (loss)	(103)										(92)					(11)
Dividends paid	(108)							(43)								(65)
Purchase of subsidiary stock from noncontrolling interests	(203)					27					(61)					(169)
Purchases of Loews Corporation treasury stock	(711)													(711)
Stock-based compensation	16					(7)										23
Other	(2)					(4)		1						1
Balance at end of period at Sep. 30, 2023	15,158			2		2,764		15,877			(3,473)			(722)		710
Balance at beginning of period at Jun. 30, 2023	15,470			2		2,728		15,637			(3,160)			(604)		867
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	276							253								23
Other comprehensive income (loss)	(283)										(252)					(31)
Dividends paid	(24)							(14)								(10)
Purchase of subsidiary stock from noncontrolling interests	(177)					27					(61)					(143)
Purchases of Loews Corporation treasury stock	(118)													(118)
Stock-based compensation	11					10										1
Other	3					(1)		1								3
Balance at end of period at Sep. 30, 2023	15,158			2		2,764		15,877			(3,473)			(722)		710
Balance at beginning of period at Dec. 31, 2023	16,525			2		2,589		15,617			(2,497)			(7)		821
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,305							1,227								78
Other comprehensive income (loss)	829										759					70
Dividends paid	(117)							(42)								(75)
Purchase of subsidiary stock from noncontrolling interests	(20)															(20)
Purchases of Loews Corporation treasury stock	(264)													(264)
Stock-based compensation	9					(11)										20
Other	(19)					(16)										(3)
Balance at end of period at Sep. 30, 2024	18,248			2		2,562		16,802			(1,738)			(271)		891
Balance at beginning of period at Jun. 30, 2024	17,201			2		2,556		16,415			(2,383)			(206)		817
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	425							401								24
Other comprehensive income (loss)	704										645					59
Dividends paid	(24)							(14)								(10)
Purchases of Loews Corporation treasury stock	(65)													(65)
Stock-based compensation	12					11										1
Other	(5)					(5)
Balance at end of period at Sep. 30, 2024	$ 18,248			$ 2		$ 2,562		$ 16,802			$ (1,738)			$ (271)		$ 891

CONSOLIDATED CONDENSED STATEM_5

CONSOLIDATED CONDENSED STATEMENTS OF EQUITY (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Stockholders' Equity [Abstract]
Dividends paid (in dollars per share)	$ 0.0625	$ 0.0625	$ 0.1875	$ 0.1875

CONSOLIDATED CONDENSED STATEM_6

CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Operating Activities:
Net income	$ 1,305	$ 1,068
Adjustments to reconcile net income to net cash provided by operating activities, net	425	519
Changes in operating assets and liabilities, net:
Receivables	(390)	(71)
Deferred acquisition costs	(45)	(74)
Insurance reserves	1,559	1,184
Other assets	(126)	(152)
Other liabilities	54	51
Trading securities	(698)	905
Net cash flow provided by operating activities	2,084	3,430
Investing Activities:
Purchases of fixed maturities	(4,965)	(5,459)
Proceeds from sales of fixed maturities	2,335	3,284
Proceeds from maturities of fixed maturities	1,755	960
Purchases of equity securities	(332)	(200)
Proceeds from sales of equity securities	388	192
Purchases of limited partnership investments	(235)	(322)
Proceeds from sales of limited partnership investments	46	205
Purchases of property, plant and equipment	(458)	(463)
Acquisitions		(348)
Dispositions	23
Change in short-term investments	(583)	60
Other, net	10	(162)
Net cash flow used by investing activities	(2,016)	(2,253)
Financing Activities:
Dividends paid	(42)	(43)
Dividends paid to noncontrolling interests	(75)	(65)
Purchases of Loews Corporation treasury stock	(262)	(709)
Purchases of subsidiary stock from noncontrolling interests	(20)	(203)
Principal payments on debt	(763)	(503)
Issuance of debt	1,284	593
Other, net	(44)	(17)
Net cash flow provided by (used by) financing activities	78	(947)
Effect of foreign exchange rate on cash	3
Net change in cash	149	230
Cash, beginning of period	399	532
Cash, end of period	$ 548	$ 762

Basis of Presentation

Basis of Presentation	9 Months Ended
Basis of Presentation	Sep. 30, 2024
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation Loews Corporation is a holding company. Its consolidated operating subsidiaries are engaged in the following lines of business: commercial property and casualty insurance (CNA Financial Corporation (“CNA”), an approximately 92% owned subsidiary); transportation and storage of natural gas and natural gas liquids and other hydrocarbons (Boardwalk Pipeline Partners, LP (“Boardwalk Pipelines”), a wholly owned subsidiary) and the operation of a chain of hotels (Loews Hotels Holding Corporation (“Loews Hotels & Co”), a wholly owned subsidiary). Unless the context otherwise requires, as used herein, the term “Company” means Loews Corporation including its consolidated subsidiaries, the term “Parent Company” means Loews Corporation excluding its subsidiaries, the term “Net income (loss) attributable to Loews Corporation” means Net income (loss) attributable to Loews Corporation shareholders and the term “subsidiaries” means Loews Corporation’s consolidated subsidiaries. In the opinion of management, the accompanying unaudited Consolidated Condensed Financial Statements reflect all adjustments (consisting of normal recurring accruals) necessary to present fairly the Company’s financial position as of September 30, 2024 and December 31, 2023, results of operations, comprehensive income (loss) and changes in shareholders’ equity for the three and nine months ended September 30, 2024 and 2023 and cash flows for the nine months ended September 30, 2024 and 2023, in each case in accordance with accounting principles generally accepted in the United States of America (“GAAP”). Results for the interim periods are not necessarily indicative of results for the entire year. These Consolidated Condensed Financial Statements should be read in conjunction with the Consolidated Financial Statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023. The Company presents basic and diluted net income (loss) per share on the Consolidated Condensed Statements of Operations. Basic net income (loss) per share excludes dilution and is computed by dividing net income (loss) attributable to common stock by the weighted average number of common shares outstanding for the period. Diluted net income per share reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock. For the three and nine months ended September 30, 2024 and 2023 there were no shares attributable to employee stock-based compensation awards excluded from the diluted weighted average shares outstanding amounts because the effect would have been antidilutive. Recently issued Accounting Standards Updates (“ASUs”) - In November of 2023, the Financial Accounting Standards Board (“FASB”) issued ASU 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures.” The updated accounting guidance requires enhanced reportable segment disclosures, primarily related to significant segment expenses which are regularly provided to the chief operating decision maker (“CODM”). The guidance is effective for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024. Retrospective application is required and early adoption is permitted. The Company is currently evaluating the effect the updated guidance will have on its financial statement disclosures and expects to disclose additional quantitative and qualitative information related to segment expenses regularly provided to the CODM that are included in the segment measures of profit or loss. In December of 2023, the FASB issued ASU 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures.” The updated accounting guidance requires expanded income tax disclosures, including the disaggregation of existing disclosures related to the effective tax rate reconciliation and income taxes paid. The guidance is effective for fiscal years beginning after December 15, 2024. Prospective application is required, with retrospective application permitted. The Company is currently evaluating the effect the updated guidance will have on its financial statement disclosures.

Investments

Investments	9 Months Ended
Investments	Sep. 30, 2024
Investments, Debt and Equity Securities [Abstract]
Investments	Investments Net investment income is as follows: Three Months Ended Nine Months Ended September 30, September 30, 2024 2023 2024 2023 (In millions) Fixed maturity securities $ 517 $ 491 $ 1,530 $ 1,443 Limited partnership investments 67 29 195 111 Short-term investments 21 24 70 54 Equity securities (a) 21 9 56 42 Income from trading portfolio (a) 141 32 210 91 Other 33 30 95 78 Total investment income 800 615 2,156 1,819 Investment expenses (24) (23) (72) (67) Net investment income $ 776 $ 592 $ 2,084 $ 1,752 (a) Net investment income (loss) recognized due to the change in fair value of equity and trading portfolio securities held as of September 30, 2024 and 2023 $ 108 $ (14) $ 123 $ 3 Investment gains (losses) are as follows: Three Months Ended Nine Months Ended September 30, September 30, 2024 2023 2024 2023 (In millions) Fixed maturity securities: Gross gains $ 11 $ 12 $ 38 $ 55 Gross losses (33) (49) (104) (141) Investment losses on fixed maturity securities (22) (37) (66) (86) Equity securities (a) 13 2 25 (9) Short-term investments and other (1) (3) (1) (10) Gain on acquisition of a joint venture 46 Investment losses $ (10) $ (38) $ (42) $ (59) (a) Investment gains (losses) recognized due to the change in fair value of non-redeemable preferred stock included within equity securities held as of September 30, 2024 and 2023 $ 13 $ 2 $ 24 $ 2 The available-for-sale impairment losses (gains) recognized in earnings by asset type are presented in the following table. The table includes losses (gains) on securities with an intention to sell and changes in the allowance for credit losses on securities since acquisition date: Three Months Ended Nine Months Ended September 30, September 30, 2024 2023 2024 2023 (In millions) Fixed maturity securities available-for-sale: Corporate and other bonds $ 8 $ 8 $ 23 $ 25 Asset-backed 4 4 9 12 Impairment losses recognized in earnings $ 12 $ 12 $ 32 $ 37 T here were no losses recognized on mortgage loans during the three and nine months ended September 30, 2024. There were $5 million and $11 million of losses recognized on mortgage loans during the three and nine months ended September 30, 2023. The following tables present a summary of fixed maturity securities: September 30, 2024 Cost or Amortized Cost Gross Unrealized Gross Unrealized Allowance Estimated (In millions) Fixed maturity securities: Corporate and other bonds $ 25,872 $ 826 $ 900 $ 6 $ 25,792 States, municipalities and political 7,406 359 617 7,148 Asset-backed: Residential mortgage-backed 3,684 32 362 3,354 Commercial mortgage-backed 1,816 14 141 1,689 Other asset-backed 3,743 40 186 12 3,585 Total asset-backed 9,243 86 689 12 8,628 U.S. Treasury and obligations of 224 2 4 222 Foreign government 755 8 26 737 Fixed maturities available-for-sale $ 43,500 $ 1,281 $ 2,236 $ 18 $ 42,527 Fixed maturities trading 528 528 Total fixed maturity securities $ 44,028 $ 1,281 $ 2,236 $ 18 $ 43,055 December 31, 2023 Fixed maturity securities: Corporate and other bonds $ 25,020 $ 597 $ 1,345 $ 4 $ 24,268 States, municipalities and political 7,713 382 703 7,392 Asset-backed: Residential mortgage-backed 3,411 16 425 3,002 Commercial mortgage-backed 1,862 7 230 8 1,631 Other asset-backed 3,515 13 256 4 3,268 Total asset-backed 8,788 36 911 12 7,901 U.S. Treasury and obligations of 152 1 2 151 Foreign government 741 6 34 713 Fixed maturities available-for-sale $ 42,414 $ 1,022 $ 2,995 $ 16 $ 40,425 Fixed maturities trading 201 201 Total fixed maturity securities $ 42,615 $ 1,022 $ 2,995 $ 16 $ 40,626 The available-for-sale fixed maturity securities in a gross unrealized loss position for which an allowance for credit losses has not been recorded are as follows: Less than 12 Months 12 Months or Longer Total September 30, 2024 Estimated Fair Value Gross Unrealized Losses Estimated Fair Value Gross Unrealized Losses Estimated Fair Value Gross Unrealized Losses (In millions) Fixed maturity securities: Corporate and other bonds $ 1,664 $ 31 $ 11,240 $ 869 $ 12,904 $ 900 States, municipalities and political 422 7 3,155 610 3,577 617 Asset-backed: Residential mortgage-backed 130 2 2,162 360 2,292 362 Commercial mortgage-backed 112 1,134 141 1,246 141 Other asset-backed 151 4 1,638 182 1,789 186 Total asset-backed 393 6 4,934 683 5,327 689 U.S. Treasury and obligations of 45 2 45 2 90 4 Foreign government 99 1 403 25 502 26 Total fixed maturity securities $ 2,623 $ 47 $ 19,777 $ 2,189 $ 22,400 $ 2,236 December 31, 2023 Fixed maturity securities: Corporate and other bonds $ 1,943 $ 37 $ 13,406 $ 1,308 $ 15,349 $ 1,345 States, municipalities and political 598 18 3,104 685 3,702 703 Asset-backed: Residential mortgage-backed 233 4 2,212 421 2,445 425 Commercial mortgage-backed 200 5 1,184 225 1,384 230 Other asset-backed 392 8 1,869 248 2,261 256 Total asset-backed 825 17 5,265 894 6,090 911 U.S. Treasury and obligations of 65 1 23 1 88 2 Foreign government 52 1 450 33 502 34 Total fixed maturity securities $ 3,483 $ 74 $ 22,248 $ 2,921 $ 25,731 $ 2,995 The following table presents the estimated fair value and gross unrealized losses of available-for-sale fixed maturity securities in a gross unrealized loss position for which an allowance for credit loss has not been recorded, by ratings distribution. September 30, 2024 December 31, 2023 Estimated Fair Value Gross Unrealized Losses Estimated Fair Value Gross Unrealized Losses (In millions) U.S. Government, Government agencies and Government-sponsored enterprises $ 2,127 $ 265 $ 2,273 $ 309 AAA 1,277 221 1,524 261 AA 3,641 547 3,817 658 A 5,229 405 5,652 517 BBB 9,243 689 11,523 1,095 Non-investment grade 883 109 942 155 Total $ 22,400 $ 2,236 $ 25,731 $ 2,995 Based on current facts and circumstances, the unrealized losses presented in the September 30, 2024 securities in the gross unrealized loss position table above are not indicative of the ultimate collectability of the current amortized cost of the securities, but rather are primarily attributable to changes in risk-free interest rates. In reaching this determination, the volatility in risk-free rates and credit spreads, as well as the fact that the unrealized losses are concentrated in investment grade issuers, were considered. Additionally, there is no current intent to sell securities with unrealized losses, nor is it more likely than not that sale will be required prior to recovery of amortized cost; accordingly, it was determined that there are no additional impairment losses to be recorded as of September 30, 2024. The following tables present the activity related to the allowance on available-for-sale securities with credit impairments and purchased credit-deteriorated (“PCD”) assets. Accrued interest receivable on available-for-sale fixed maturity securities totaled $451 million, $435 million and $430 million as of September 30, 2024, December 31, 2023 and September 30, 2023 and are excluded from the estimate of expected credit losses and the amortized cost basis in the tables within this Note. Three months ended September 30, 2024 Corporate and Other Bonds Asset-backed Total (In millions) Allowance for credit losses: Balance as of July 1, 2024 $ — $ 17 $ 17 Additions to the allowance for credit losses: Securities for which credit losses were not previously recorded 4 4 Available-for-sale securities accounted for as PCD assets 2 2 Reductions to the allowance for credit losses: Write-offs charged against the allowance 9 9 Additional increases to the allowance for credit losses on securities that had an allowance recorded in a previous period 4 4 Total allowance for credit losses $ 6 $ 12 $ 18 Three months ended September 30, 2023 Corporate and Other Bonds Asset-backed Total (In millions) Allowance for credit losses: Balance as of July 1, 2023 $ 13 $ 9 $ 22 Additions to the allowance for credit losses: Securities for which credit losses were not previously recorded 5 5 Available-for-sale securities accounted for as PCD assets 2 2 Reductions to the allowance for credit losses: Write-offs charged against the allowance 15 15 Additional increases to the allowance for credit losses on securities that had an allowance recorded in a previous period 4 4 Total allowance for credit losses $ 5 $ 13 $ 18 Nine months ended September 30, 2024 Corporate and Other Bonds Asset-backed Total (In millions) Allowance for credit losses: Balance as of January 1, 2024 $ 4 $ 12 $ 16 Additions to the allowance for credit losses: Securities for which credit losses were not previously recorded 4 4 Available-for-sale securities accounted for as PCD assets 2 2 Reductions to the allowance for credit losses: Securities sold during the period (realized) 3 1 4 Intent to sell or more likely than not will be required to sell the security before recovery of its amortized cost basis 1 1 Write-offs charged against the allowance 9 9 Additional increases to the allowance for credit losses on securities that had an allowance recorded in a previous period 10 10 Total allowance for credit losses $ 6 $ 12 $ 18 Nine months ended September 30, 2023 Corporate and Other Bonds Asset-backed Total (In millions) Allowance for credit losses: Balance as of January 1, 2023 $ — $ 1 $ 1 Additions to the allowance for credit losses: Securities for which credit losses were not previously recorded 6 7 13 Available-for-sale securities accounted for as PCD assets 22 22 Reductions to the allowance for credit losses: Securities sold during the period (realized) 6 6 Intent to sell or more likely than not will be required to sell the 3 3 Write-offs charged against the allowance 15 15 Additional increases to the allowance for credit losses on securities that had an allowance recorded in a previous period 1 5 6 Total allowance for credit losses $ 5 $ 13 $ 18 Contractual Maturity The following table presents available-for-sale fixed maturity securities by contractual maturity. September 30, 2024 December 31, 2023 Cost or Amortized Cost Estimated Fair Cost or Amortized Cost Estimated (In millions) Due in one year or less $ 1,585 $ 1,565 $ 1,121 $ 1,091 Due after one year through five years 11,948 11,800 11,563 11,180 Due after five years through ten years 13,282 12,907 13,359 12,573 Due after ten years 16,685 16,255 16,371 15,581 Total $ 43,500 $ 42,527 $ 42,414 $ 40,425 Actual maturities may differ from contractual maturities because certain securities may be called or prepaid. Securities not due at a single date are allocated based on weighted average life. Mortgage Loans The following table presents the amortized cost basis of mortgage loans for each credit quality indicator by year of origination. The primary credit quality indicators utilized are debt service coverage ratios (“DSCR”) and loan-to-value (“LTV”) ratios. Mortgage Loans Amortized Cost Basis by Origination Year (a) As of September 30, 2024 2024 2023 2022 2021 2020 Prior Total (In millions) DSCR ≥1.6x LTV less than 55% $ 33 $ 9 $ 2 $ 97 $ 242 $ 383 LTV 55% to 65% 5 5 LTV greater than 65% 30 12 42 DSCR 1.2x - 1.6x LTV less than 55% 28 5 13 50 96 LTV 55% to 65% $ 43 20 36 36 4 31 170 LTV greater than 65% 13 64 20 97 DSCR ≤1.2x LTV less than 55% — LTV 55% to 65% 32 75 41 148 LTV greater than 65% 28 21 48 97 Total $ 43 $ 126 $ 247 $ 76 $ 134 $ 412 $ 1,038 (a) The values in the table above reflect DSCR on a standardized amortization period and LTV ratios based on the most recent appraised values trended forward using changes in a commercial real estate price index. Derivative Financial Instruments A summary of the aggregate contractual or notional amounts and gross estimated fair values related to derivative financial instruments follows. The contractual or notional amounts for derivatives are used to calculate the exchange of contractual payments under related agreements and may not be representative of the potential for gain or loss on these instruments. Gross estimated fair values of derivative positions are currently presented in Equity securities, Receivables and Payable to brokers on the Consolidated Condensed Balance Sheets. September 30, 2024 December 31, 2023 Contractual/Notional Amount Estimated Fair Value Contractual/Notional Amount Estimated Fair Value Asset (Liability) Asset (Liability) (In millions) Without hedge designation: Equity markets: Options – purchased $ 338 $ 1 $ 202 $ 1 Futures – short 158 $ (1) 116 Warrants 1 1 84 3 Interest rate swaps 300 6 300 13 Currency forwards 13 $ (1) Investment Commitments As part of the overall investment strategy, investments are made in various assets which require future purchase, sale or funding commitments. These investments are recorded once funded, and the related commitments may include future capital calls from various third-party limited partnerships, signed and accepted mortgage loan applications and obligations related to private placement securities. As of September 30, 2024, commitments to purchase or fund were approximately $1.6 billion and to sell were approximately $90 million under the terms of these investments.

Fair Value

Fair Value	9 Months Ended
Fair Value	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Fair Value	Fair Value Assets and liabilities measured at fair value on a recurring basis are summarized in the following tables. Corporate bonds and other includes obligations of the United States of America (“U.S.”) Treasury, government-sponsored enterprises, foreign governments and redeemable preferred stock. September 30, 2024 Level 1 Level 2 Level 3 Total (In millions) Fixed maturity securities: Corporate bonds and other $ 225 $ 25,289 $ 1,237 $ 26,751 States, municipalities and political subdivisions 7,103 45 7,148 Asset-backed 7,713 915 8,628 Fixed maturities available-for-sale 225 40,105 2,197 42,527 Fixed maturities trading 528 528 Total fixed maturities $ 753 $ 40,105 $ 2,197 $ 43,055 Equity securities $ 765 $ 436 $ 14 $ 1,215 Short-term and other 5,043 30 5,073 Receivables 6 6 Payable to brokers (57) (57) December 31, 2023 Fixed maturity securities: Corporate bonds and other $ 161 $ 23,926 $ 1,045 $ 25,132 States, municipalities and political subdivisions 7,348 44 7,392 Asset-backed 7,000 901 7,901 Fixed maturities available-for-sale 161 38,274 1,990 40,425 Fixed maturities trading 201 201 Total fixed maturities $ 362 $ 38,274 $ 1,990 $ 40,626 Equity securities $ 586 $ 440 $ 24 $ 1,050 Short-term and other 4,215 32 4,247 Receivables 13 13 Payable to brokers (62) (62) The following tables present reconciliations for all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three and nine months ended September 30, 2024 and 2023: Net Realized Investment Gains (Losses) and Net Change in Unrealized Investment Gains (Losses) Unrealized Gains (Losses) Recognized in Net Income (Loss) on Level 3 Assets and Liabilities Held at September 30 Unrealized Gains (Losses) Recognized in Other Comprehensive Income (Loss) on Level 3 Assets and Liabilities Held at September 30 2024 Balance, July 1 Included in Net Income Included in OCI Purchases Sales Settlements Transfers into Transfers out of Level 3 Balance, September 30 (In millions) Fixed maturity securities: Corporate bonds and other $ 1,129 $ 59 $ 83 $ (10) $ (24) $ 1,237 $ 57 States, municipalities and political subdivisions 43 2 45 2 Asset-backed 887 $ 1 30 38 (23) $ (18) 915 30 Fixed maturities available-for-sale $ 2,059 $ 1 $ 91 $ 121 $ (10) $ (47) $ — $ (18) $ 2,197 $ — $ 89 Equity securities $ 14 $ 14 Net Realized Investment Gains (Losses) and Net Change in Unrealized Investment Gains (Losses) Unrealized Gains (Losses) Recognized in Net Income (Loss) on Level 3 Assets and Liabilities Held at September 30 Unrealized Gains (Losses) Recognized in Other Comprehensive Income (Loss) on Level 3 Assets and Liabilities Held at September 30 2023 Balance, July 1 Included in Net Income Included in OCI Purchases Sales Settlements Transfers into Transfers out of Level 3 Balance, September 30 (In millions) Fixed maturity securities: Corporate bonds and other $ 971 $ (36) $ 29 $ (19) $ 945 $ (36) States, municipalities and political subdivisions 43 (2) 41 (2) Asset-backed 883 $ 1 (28) 61 (13) $ (7) 897 (28) Fixed maturities available-for-sale $ 1,897 $ 1 $ (66) $ 90 $ — $ (32) $ — $ (7) $ 1,883 $ — $ (66) Equity securities $ 26 $ (1) $ (2) $ 23 $ (1) Net Realized Investment Gains (Losses) and Net Change in Unrealized Investment Gains (Losses) Unrealized Gains (Losses) Recognized in Net Income (Loss) on Level 3 Assets and Liabilities Held at September 30 Unrealized Gains (Losses) Recognized in Other Comprehensive Income (Loss) on Level 3 Assets and Liabilities Held at September 30 2024 Balance, January 1 Included in Net Income Included in OCI Purchases Sales Settlements Transfers into Transfers out of Level 3 Balance, September 30 (In millions) Fixed maturity securities: Corporate bonds and other $ 1,045 $ 39 $ 229 $ (10) $ (77) $ 11 $ 1,237 $ 34 States, municipalities and political subdivisions 44 1 45 1 Asset-backed 901 $ 5 14 111 (14) (65) $ (37) 915 14 Fixed maturities available-for-sale $ 1,990 $ 5 $ 54 $ 340 $ (24) $ (142) $ 11 $ (37) $ 2,197 $ — $ 49 Equity securities $ 24 $ 6 $ 3 $ (19) $ 14 $ 2 Net Realized Investment Gains (Losses) and Net Change in Unrealized Investment Gains (Losses) Unrealized Gains (Losses) Recognized in Net Income (Loss) on Level 3 Assets and Liabilities Held at September 30 Unrealized Gains (Losses) Recognized in Other Comprehensive Income (Loss) on Level 3 Assets and Liabilities Held at September 30 2023 Balance, January 1 Included in Net Income Included in OCI Purchases Sales Settlements Transfers into Transfers out of Level 3 Balance, September 30 (In millions) Fixed maturity securities: Corporate bonds and other $ 810 $ (27) $ 178 $ (27) $ 11 $ 945 $ (27) States, municipalities and political subdivisions 43 (2) 41 (2) Asset-backed 788 $ 10 (28) 203 (39) 23 $ (60) 897 (28) Fixed maturities available-for-sale $ 1,641 $ 10 $ (57) $ 381 $ — $ (66) $ 34 $ (60) $ 1,883 $ — $ (57) Equity securities $ 35 $ (8) $ (4) $ 23 $ (8) Net investment gains and losses are reported in Net income as follows: Major Category of Assets and Liabilities Consolidated Condensed Statements of Operations Line Items Fixed maturity securities available-for-sale Investment gains (losses) Fixed maturity securities trading Net investment income Equity securities Investment gains (losses) and Net investment income Other invested assets Investment gains (losses) and Net investment income Derivative financial instruments held in a trading portfolio Net investment income Derivative financial instruments, other Investment gains (losses) and Operating revenues and other Significant Unobservable Inputs The following tables present quantitative information about the significant unobservable inputs utilized in the fair value measurement of Level 3 assets. Valuations for assets and liabilities not presented in the tables below are primarily based on broker/dealer quotes for which there is a lack of transparency as to inputs used to develop the valuations. The quantitative detail of unobservable inputs from these broker quotes is neither provided nor reasonably available. The weighted average rate is calculated based on fair value. September 30, 2024 Estimated Valuation Techniques Unobservable Inputs Range (Weighted Average) (In millions) Fixed maturity securities $ 1,713 Discounted cash flow Credit spread 1 % — 6 % (2 %) December 31, 2023 Fixed maturity securities $ 1,495 Discounted cash flow Credit spread 1 % — 7 % (2 %) For fixed maturity securities, an increase to the credit spread assumptions would result in a lower fair value measurement. Financial Assets and Liabilities Not Measured at Fair Value The carrying amount, estimated fair value and the level of the fair value hierarchy of the financial assets and liabilities which are not measured at fair value on the Consolidated Condensed Balance Sheets are presented in the following tables. The carrying amounts and estimated fair values of short-term debt and long-term debt exclude finance lease obligations. The carrying amounts reported on the Consolidated Condensed Balance Sheets for cash and short-term investments not carried at fair value and certain other assets and liabilities approximate fair value due to the short-term nature of these items. Carrying Amount Estimated Fair Value September 30, 2024 Level 1 Level 2 Level 3 Total (In millions) Assets: Other invested assets, primarily mortgage loans $ 1,003 $ 988 $ 988 Liabilities: Short-term debt 712 $ 599 108 707 Long-term debt 8,818 7,892 840 8,732 December 31, 2023 Assets: Other invested assets, primarily mortgage loans $ 1,035 $ 997 $ 997 Liabilities: Short-term debt 1,083 $ 546 520 1,066 Long-term debt 7,915 7,255 385 7,640

Claim and Claim Adjustment Expe

Claim and Claim Adjustment Expense Reserves	9 Months Ended
Claim and Claim Adjustment Expense Reserves	Sep. 30, 2024
Insurance [Abstract]
Claim and Claim Adjustment Expense Reserves	Claim and Claim Adjustment Expense Reserves Claim and claim adjustment expense reserves represent the estimated amounts necessary to resolve all outstanding claims, including incurred but not reported (“IBNR”) claims as of the reporting date. Reserve projections are based primarily on detailed analysis of the facts in each case, experience with similar cases and various historical development patterns. Consideration is given to historical patterns such as claim reserving trends and settlement practices, loss payments, pending levels of unpaid claims and product mix, economic, medical and social inflation, and public attitudes. All of these factors can affect the estimation of claim and claim adjustment expense reserves. Establishing claim and claim adjustment expense reserves, including claim and claim adjustment expense reserves for catastrophic events that have occurred, is an estimation process. Many factors can ultimately affect the final settlement of a claim and, therefore, the necessary reserve. Changes in the law, results of litigation, medical costs, the cost of repair materials and labor rates can affect ultimate claim costs. In addition, time can be a critical part of reserving determinations since the longer the span between the incidence of a loss and the payment or settlement of the claim, the more variable the ultimate settlement amount can be. Accordingly, short-tail claims, such as property damage claims, tend to be more reasonably estimable than long-tail claims, such as workers’ compensation, general liability and professional liability claims. Claim and claim adjustment expense reserves are also maintained for structured settlement obligations. In developing the claim and claim adjustment expense reserve estimates for structured settlement obligations, actuaries review mortality experience on an annual basis. Adjustments to prior year reserve estimates, if necessary, are reflected in the results of operations in the period that the need for such adjustments is determined. There can be no assurance that the ultimate cost for insurance losses will not exceed current estimates. Catastrophes are an inherent risk of the property and casualty insurance business and have contributed to material period-to-period fluctuations in the Company’s results of operations and/or equity. Catastrophe losses, net of reinsurance, of $143 million and $94 million were recorded for the three months ended September 30, 2024 and 2023 and $313 million and $214 million were recorded for the nine months ended September 30, 2024 and 2023. Catastrophe losses for the three and nine months ended September 30, 2024 were primarily related to severe weather related events, including $55 million for Hurricane Helene. Catastrophe losses for the three and nine months ended September 30, 2023 were primarily related to severe weather related events. Liability for Unpaid Claim and Claim Adjustment Expenses The following table presents a reconciliation between beginning and ending claim and claim adjustment expense reserves. Nine Months Ended September 30 2024 2023 (In millions) Reserves, beginning of year: Gross $ 23,304 $ 22,120 Ceded 5,141 5,191 Net reserves, beginning of year 18,163 16,929 Net incurred claim and claim adjustment expenses: Provision for insured events of current year 4,706 4,221 Increase (decrease) in provision for insured events of prior years 26 43 Amortization of discount 30 33 Total net incurred (a) 4,762 4,297 Net payments attributable to: Current year events (655) (588) Prior year events (3,189) (2,953) Total net payments (3,844) (3,541) Foreign currency translation adjustment and other 35 (30) Net reserves, end of period 19,116 17,655 Ceded reserves, end of period 5,442 5,181 Gross reserves, end of period $ 24,558 $ 22,836 (a) Total net incurred does not agree to Insurance claims and policyholders’ benefits as reflected on the Consolidated Condensed Statements of Operations due to amounts related to retroactive reinsurance deferred gain accounting, uncollectible reinsurance, benefit expenses related to future policy benefits and policyholders’ dividends, which are not reflected in the table above. Net Prior Year Development Changes in estimates of claim and claim adjustment expense reserves, net of reinsurance, for prior years are defined as net prior year loss reserve development. These changes can be favorable or unfavorable. Favorable net prior year loss reserve development of $5 million and $7 million for the three months ended September 30, 2024 and 2023 and $24 million and $11 million for the nine months ended September 30, 2024 and 2023 was recorded for CNA’s commercial property and casualty operations (“Property & Casualty Operations”). Unfavorable net prior year loss reserve development of $22 million and $20 million for the three months ended September 30, 2024 and 2023 and $57 million and $55 million for the nine months ended September 30, 2024 and 2023 was recorded for CNA’s operations outside of Property & Casualty Operations (“Other Insurance Operations”). The following table and discussion present details of the net prior year loss reserve development in Property & Casualty Operations and Other Insurance Operations: Three Months Ended Nine Months Ended September 30, September 30, 2024 2023 2024 2023 (In millions) Medical professional liability $ (2) $ 9 Other professional liability and management liability $ 11 $ 17 28 16 Surety (20) (21) (46) (28) Warranty 7 (2) 20 (11) Commercial auto 25 46 11 General liability 28 47 70 Workers’ compensation (57) (2) (106) (100) Other property and casualty operations 1 1 (11) 22 Other insurance operations 22 20 57 55 Total pretax (favorable) unfavorable development $ 17 $ 13 $ 33 $ 44 Three Months 2024 Unfavorable development in other professional liability and management liability was primarily due to higher than expected large claim severity in CNA’s directors and officers (“D&O”) business in accident year 2019. Favorable development in surety was primarily due to lower than expected frequency and lack of systemic activity in multiple accident years. Unfavorable development in commercial auto was due to higher than expected claim severity in recent accident years. Unfavorable development in general liability was due to higher than expected large claim severity in multiple accident years going back to 2015. Favorable development in workers’ compensation was due to favorable medical trends driving lower than expected severity primarily in accident years 2018 and prior. Unfavorable development in other insurance operations was largely associated with legacy mass tort abuse claims. 2023 Unfavorable development in other professional liability and management liability was primarily due to higher than expected claim severity and frequency in CNA’s cyber and professional errors and omissions (“E&O”) businesses in multiple accident years. Favorable development in surety was primarily due to lower than expected frequency and lack of systemic activity in multiple accident years. Unfavorable development in other insurance operations was largely associated with legacy mass tort abuse claims. Nine Months 2024 Unfavorable development in other professional liability and management liability was primarily due to higher than expected claim severity and frequency in CNA’s professional E&O and cyber businesses. Favorable development in surety was primarily due to lower than expected frequency and lack of systemic activity in multiple accident years. Unfavorable development in warranty was primarily due to higher than expected frequency and severity in a recent accident year. Unfavorable development in commercial auto was due to higher than expected claim severity in recent accident years. Unfavorable development in general liability was due to higher than expected large claim severity in multiple accident years going back to 2015. Favorable development in workers’ compensation was due to favorable medical trends driving lower than expected severity primarily in accident years 2018 and prior. Unfavorable development in other insurance operations was largely associated with legacy mass tort abuse claims. 2023 Unfavorable development in other professional liability and management liability was primarily due to higher than expected claim severity and frequency in CNA’s cyber and professional E&O businesses in multiple accident years. Favorable development in surety was primarily due to lower than expected frequency and lack of systemic activity in multiple accident years. Favorable development in warranty was due to lower than expected loss emergence in a recent accident year. Unfavorable development in commercial auto was due to higher than expected claim severity in CNA’s construction business in a recent accident year. Unfavorable development in general liability was due to higher than expected claim severity in CNA’s construction and middle market businesses across multiple accident years. Favorable development in workers’ compensation was due to favorable medical trends driving lower than expected severity in multiple accident years. Unfavorable development in other property and casualty operations was due to higher than expected large loss emergence in CNA’s professional liability business in accident year 2017. Unfavorable development in other insurance operations was largely associated with legacy mass tort abuse claims. Asbestos & Environmental Pollution (“A&EP”) Reserves In 2010, Continental Casualty Company (“CCC”) together with several insurance subsidiaries completed a transaction with National Indemnity Company (“NICO”), a subsidiary of Berkshire Hathaway Inc., under which substantially all of their legacy A&EP liabilities were ceded to NICO through a loss portfolio transfer (“LPT”). At the effective date of the transaction, approximately $1.6 billion of net A&EP claim and allocated claim adjustment expense reserves were ceded to NICO under a retroactive reinsurance agreement with an aggregate limit of $4.0 billion. The $1.6 billion of claim and allocated claim adjustment expense reserves ceded to NICO was net of $1.2 billion of ceded claim and allocated claim adjustment expense reserves under existing third party reinsurance contracts. The NICO LPT aggregate reinsurance limit also covers credit risk on the existing third party reinsurance related to these liabilities. NICO was paid a reinsurance premium of $2.0 billion and billed third party reinsurance receivables related to A&EP claims with a net book value of $215 million were transferred to NICO, resulting in total consideration of $2.2 billion. In years subsequent to the effective date of the LPT, adverse prior year development on A&EP reserves was recognized resulting in additional amounts ceded under the LPT. As a result, the cumulative amounts ceded under the LPT have exceeded the $2.2 billion consideration paid, resulting in the NICO LPT moving into a gain position, requiring retroactive reinsurance accounting. Under retroactive reinsurance accounting, this gain is deferred and only recognized in earnings in proportion to actual paid recoveries under the LPT. Over the life of the contract, there is no economic impact as long as any additional losses incurred are within the limit of the LPT. In a period in which a change in the estimate of A&EP reserves is recognized that increases or decreases the amounts ceded under the LPT, the proportion of actual paid recoveries to total ceded losses is affected and the change in the deferred gain is recognized in earnings as if the revised estimate of ceded losses was available at the effective date of the LPT. The effect of the deferred retroactive reinsurance benefit is recorded in Insurance claims and policyholders’ benefits in the Consolidated Condensed Statements of Operations. The impact of the LPT on the Consolidated Condensed Statements of Operations was the recognition of a retroactive reinsurance benefit of $11 million and $15 million for the three months ended September 30, 2024 and 2023 and $36 million and $38 million for the nine months ended September 30, 2024 and 2023 . As of September 30, 2024 and December 31, 2023, the cumulative amounts ceded under the LPT were $3.6 billion. The unrecognized deferred retroactive reinsurance benefit was $382 million and $417 million as of September 30, 2024 and December 31, 2023 and is included within Other liabilities on the Consolidated Condensed Balance Sheets. NICO established a collateral trust account as security for its obligations under the LPT. The fair value of the collateral trust account was $2.3 billion as of September 30, 2024. In addition, Berkshire Hathaway Inc. guaranteed the payment obligations of NICO up to the aggregate reinsurance limit as well as certain of NICO’s performance obligations under the trust agreement. NICO is responsible for claims handling and billing and collection from third-party reinsurers related to A&EP claims. Credit Risk for Ceded Reserves The majority of CNA’s outstanding voluntary reinsurance receivables are due from reinsurers with financial strength ratings of A- or higher. Receivables due from reinsurers with lower financial strength ratings are primarily due from captive reinsurers and are backed by collateral arrangements.

Future Policy Benefits Reserves

Future Policy Benefits Reserves	9 Months Ended
Future Policy Benefits Reserves	Sep. 30, 2024
Insurance [Abstract]
Future Policy Benefit Reserves	Future Policy Benefits Reserves Future policy benefits reserves are associated with CNA’s run-off long-term care business, included in Other Insurance Operations, and relate to policyholders that are currently receiving benefits, including claims that have been incurred but are not yet reported, as well as policyholders that are not yet receiving benefits. Future policy benefits reserves are comprised of the liability for future policyholder benefits (“LFPB”) which is reflected as Insurance reserves: Future policy benefits on the Consolidated Condensed Balance Sheet. The determination of Future policy benefits reserves requires management to make estimates and assumptions about expected policyholder experience over the remaining life of the policy. Since policies may be in force for several decades, these assumptions are subject to significant estimation risk. As a result of this variability, CNA’s future policy benefits reserves may be subject to material increases if actual experience develops adversely to its expectations. Annually in the third quarter, actuarial analysis is performed on policyholder morbidity, persistency, premium rate increases and expense experience. This analysis, combined with judgment, informs the setting of updated cash flow assumptions used to estimate the LFPB. Actuarial analysis includes predictive modeling, actual to expected experience comparisons and trend analysis. Applicable industry research is also considered. The cash flow assumption updates for the third quarter of 2024 resulted in a $15 million pretax increase in the LFPB. Included in the assumption updates was a favorable impact from outperformance on premium rate assumptions and an unfavorable impact from higher cost of care inflation. The cash flow assumption updates for the third quarter of 2023 resulted in an $8 million pretax increase to the LFPB. Persistency updates were unfavorable due to revisions to lapse rates. Morbidity updates were favorable driven by claim severity assumption updates, and there was a favorable impact from outperformance on premium rate assumptions. For further information on the long-term care reserving process see Note 1 of the Consolidated Financial Statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023. The following table summarizes balances and changes in the LFPB: 2024 2023 (In millions) Present value of future net premiums Balance, January 1 $ 3,710 $ 3,993 Effect of changes in discount rate (125) (74) Balance, January 1, at original locked in discount rate 3,585 3,919 Effect of changes in cash flow assumptions (a) 111 28 Effect of actual variances from expected experience (a) (40) (112) Adjusted balance, January 1 3,656 3,835 Interest accrual 139 153 Net premiums: earned during period (317) (332) Balance, end of period at original locked in discount rate 3,478 3,656 Effect of changes in discount rate 147 (67) Balance, September 30 $ 3,625 $ 3,589 Present value of future benefits & expenses Balance, January 1 $ 17,669 $ 17,472 Effect of changes in discount rate (578) (125) Balance, January 1, at original locked in discount rate 17,091 17,347 Effect of changes in cash flow assumptions (a) 126 36 Effect of actual variances from expected experience (a) 33 (45) Adjusted balance, January 1 17,250 17,338 Interest accrual 693 723 Benefit & expense payments (883) (945) Balance, end of period at original locked in discount rate 17,060 17,116 Effect of changes in discount rate 612 (873) Balance, September 30 $ 17,672 $ 16,243 Net LFPB, September 30 $ 14,047 $ 12,654 (a) As of September 30, 2024 and 2023 , the re-measurement gain (loss) of $(88) million and $(75) million presented parenthetically on the Consolidated Condensed Statement of Operations is comprised of the effect of changes in cash flow assumptions and the effect of actual variances from expected experience. The following table presents earned premiums and interest expense associated with the long-term care business recognized on the Condensed Consolidated Statement of Operations. Three Months Ended Nine Months Ended September 30, September 30, 2024 2023 2024 2023 (In millions) Earned premiums $ 110 $ 112 $ 329 $ 340 Interest expense 185 191 554 570 The following table presents undiscounted expected future benefit and expense payments and undiscounted expected future gross premiums. September 30, 2024 2023 (In millions) Expected future benefit and expense payments $ 32,009 $ 33,217 Expected future gross premiums 5,305 5,557 Discounted expected future gross premiums at the upper-medium grade fixed income instrument yield discount rate were $3.8 billion and $3.7 billion as of September 30, 2024 and 2023. The weighted average effective duration of the LFPB calculated using the original locked in discount rate was 11 years and 12 years as of September 30, 2024 and 2023. The weighted average interest rates in the table below are calculated based on the rate used to discount all future cash flows. September 30, December 31, 2024 2023 2023 Original locked in discount rate 5.20 % 5.24 % 5.22 % Upper-medium grade fixed income instrument discount rate 4.90 5.78 4.94 For the three and nine months ended September 30, 2024, immediate charges to net income resulting from adverse development that caused the net premium ratio (“NPR”) to exceed 100% for certain cohorts were $84 million and $128 million. For the three and nine months ended September 30, 2023, immediate charges to net income resulting from adverse development that caused the NPR to exceed 100% were $109 million and $152 million . For the three and nine months ended September 30, 2024, the portion of losses recognized in a prior period due to NPR exceeding 100% for certain cohorts which, due to favorable development, was reversed through net income was $20 million and $28 million . For the three and nine months ended September 30, 2023 , the portion of losses recognized in a prior period due to NPR exceeding 100% which, due to favorable development, was reversed through net income was $26 million and $37 million .

Shareholders' Equity

Shareholders' Equity	9 Months Ended
Shareholders' Equity	Sep. 30, 2024
Equity [Abstract]
Shareholders' Equity	Shareholders’ Equity Accumulated other comprehensive income (loss) The tables below present the changes in Accumulated other comprehensive income (loss) (“AOCI”) by component for the three and nine months ended September 30, 2023 and 2024 : Net Unrealized Gains (Losses) on Investments with an Allowance for Credit Losses Net Unrealized Gains (Losses) on Other Investments Cumulative Unrealized Gains (Losses) on Cash Flow Hedges Pension and Postretirement Benefits Foreign Currency Translation Total Accumulated Other Comprehensive Income (Loss) (In millions) Balance, July 1, 2023 $ (16) $ (2,238) $ (163) $ 20 $ (609) $ (154) $ (3,160) Other comprehensive income (loss) before reclassifications, after tax of $3, $295, $(217), $(2), $0 and $0 (9) (1,105) 818 (1) (55) (352) Reclassification of losses from accumulated other comprehensive loss, after tax of $(2), $(6), $0, $0, $(11) and $0 8 21 40 69 Other comprehensive income (loss) (1) (1,084) 818 (1) 40 (55) (283) Amounts attributable to noncontrolling interests 1 95 (69) (1) 5 31 Purchase of CNA shares (46) (1) (10) (4) (61) Balance, September 30, 2023 $ (16) $ (3,273) $ 585 $ 19 $ (580) $ (208) $ (3,473) Balance, July 1, 2024 $ (10) $ (1,903) $ 234 $ 10 $ (525) $ (189) $ (2,383) Other comprehensive income (loss) before reclassifications, after tax of $3, $(337), $165, $3, $0 and $0 (9) 1,253 (623) (7) 1 64 679 Reclassification of losses from accumulated other comprehensive loss, after tax of $(2), $(3), $0, $0, $(3) and $0 6 11 8 25 Other comprehensive income (loss) (3) 1,264 (623) (7) 9 64 704 Amounts attributable to noncontrolling interests (105) 52 (1) (5) (59) Balance, September 30, 2024 $ (13) $ (744) $ (337) $ 3 $ (517) $ (130) $ (1,738) Net Unrealized Gains (Losses) on Investments with an Allowance for Credit Losses Net Unrealized Gains (Losses) on Other Investments Cumulative Unrealized Gains (Losses) on Cash Flow Hedges Pension and Postretirement Benefits Foreign Currency Translation Total Accumulated Other Comprehensive Income (Loss) (In millions) Balance, January 1, 2023, as reported $ (7) $ (2,469) $ — $ 14 $ (622) $ (200) $ (3,284) Cumulative effect adjustments from changes in accounting standard s, after tax of $0, $0, $11, $0, $0 and $0 (36) (36) Balance, January 1, 2023, as adjusted (7) (2,469) (36) 14 (622) (200) (3,320) Other comprehensive income (loss) before reclassifications, after tax of $7, $235, $(180), $(1), $0 and $0 (25) (880) 678 5 (4) (226) Reclassification of losses from accumulated other comprehensive loss, after tax of $(4), $(14), $0, $0, $(15) and $0 15 53 55 123 Other comprehensive income (loss) (10) (827) 678 5 55 (4) (103) Amounts attributable to noncontrolling interests 1 69 (56) (3) 11 Purchase of CNA shares (46) (1) (10) (4) (61) Balance, September 30, 2023 $ (16) $ (3,273) $ 585 $ 19 $ (580) $ (208) $ (3,473) Balance, January 1, 2024 $ (12) $ (1,483) $ (329) $ 9 $ (533) $ (149) $ (2,497) Other comprehensive income (loss) before reclassifications, after tax of $4, $(206), $2, $3, $0 and $0 (14) 764 (9) (6) 1 21 757 Reclassification of losses from accumulated other comprehensive loss, after tax of $(4), $(10), $0, $0, $(5) and $0 13 39 20 72 Other comprehensive income (loss) (1) 803 (9) (6) 21 21 829 Amounts attributable to noncontrolling interests (67) 1 (2) (2) (70) Other 3 (3) — Balance, September 30, 2024 $ (13) $ (744) $ (337) $ 3 $ (517) $ (130) $ (1,738) Amounts reclassified from AOCI shown above are reported in Net income (loss) as follows: Major Category of AOCI Affected Line Item Net unrealized gains (losses) on investments with an allowance for credit losses and Net unrealized gains (losses) on other investments Investment gains (losses) Unrealized gains (losses) on cash flow hedges Operating revenues and other, Interest expense and Operating expenses and other Pension and postretirement benefits Operating expenses and other Stock Purchases Loews Corporation repurchased 3.5 million and 11.9 million shares of its common stock at aggregate costs of $264 million and $711 million during the nine months ended September 30, 2024 and 2023.

Debt

Debt	9 Months Ended
Debt	Sep. 30, 2024
Debt Disclosure [Abstract]
Debt	Debt In February of 2024 , CNA completed a public offering of $500 million aggregate principal amount of its 5.1% senior notes due February 15, 2034 and in May of 2024, CNA repaid at maturity the outstanding $550 million aggregate principal amount of its 4.0% senior notes. In February of 2024 , Boardwalk Pipelines completed a public offering of $600 million aggregate principal amount of its 5.6% senior notes due August 1, 2034 . Boardwalk Pipelines intends to use the net proceeds to retire the outstanding $600 million aggregate principal amount of its 5.0% notes due December 2024 at maturity .

Revenue from Contracts with Cus

Revenue from Contracts with Customers	9 Months Ended
Revenue from Contracts with Customers	Sep. 30, 2024
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	Revenue from Contracts with Customers Disaggregation of revenues – Revenue from contracts with customers, other than insurance premiums, is reported as Non-insurance warranty revenue and within Operating revenues and other on the Consolidated Condensed Statements of Operations. The following table presents revenues from contracts with customers disaggregated by revenue type along with the reportable segment and a reconciliation to Operating revenues and other as reported in Note 12 : Three Months Ended Nine Months Ended September 30, September 30, 2024 2023 2024 2023 (In millions) Non-insurance warranty – CNA Financial $ 401 $ 407 $ 1,212 $ 1,221 Transportation and storage of natural gas and NGLs and ethane supply and transportation services – Boardwalk Pipelines $ 463 $ 347 $ 1,431 $ 1,083 Lodging and related services – Loews Hotels & Co 220 190 673 577 Total revenues from contracts with customers 683 537 2,104 1,660 Other revenues 23 22 74 68 Operating revenues and other $ 706 $ 559 $ 2,178 $ 1,728 Receivables from contracts with customers – As of September 30, 2024 and December 31, 2023, receivables from contracts with customers were approximately $200 million and $228 million and are included within Receivables on the Consolidated Condensed Balance Sheets. Deferred revenue – As of September 30, 2024 and December 31, 2023, deferred revenue resulting from contracts with customers were approximately $4.7 billion and $4.8 billion and are reported as Deferred non-insurance warranty revenue and within Other liabilities on the Consolidated Condensed Balance Sheets. Approximately $1.1 billion and $905 million of revenues recognized during the nine months ended September 30, 2024 and 2023 were included in deferred revenue as of December 31, 2023 and 2022. Performance obligations – As of September 30, 2024, approximately $15.5 billion of estimated operating revenues is expected to be recognized in the future related to outstanding performance obligations. The balance relates primarily to revenues for transportation and storage services for natural gas and natural gas liquids and other hydrocarbons (“NGLs”) and certain ethane supply contracts at Boardwalk Pipelines and non-insurance warranty revenue at CNA. Approximately $0.8 billion will be recognized during the remaining three months of 2024 , $2.8 billion in 2025 and the remainder in following years. The actual timing of recognition may vary due to factors outside of the Company’s control.

Benefit Plans

Benefit Plans	9 Months Ended
Benefit Plans	Sep. 30, 2024
Retirement Benefits [Abstract]
Benefit Plans	Benefit Plans The Company has several non-contributory defined benefit plans and postretirement benefit plans covering eligible employees and retirees. The following tables present the components of net periodic (benefit) cost for the defined benefit plans: Pension Benefits Three Months Ended Nine Months Ended September 30, September 30, 2024 2023 2024 2023 (In millions) Service cost $ 1 $ 1 $ 2 $ 2 Interest cost 23 28 72 84 Expected return on plan assets (29) (32) (88) (96) Amortization of unrecognized net loss 7 9 22 27 Settlements 4 47 4 48 Net periodic cost $ 6 $ 53 $ 12 $ 65 During the third quarter of 2023, the Company terminated a non-contributory defined benefit plan through lump sum settlement payments to certain participants and the transfer of the remaining liability to a third party insurance company through the purchase of group annuity contracts. The Company recorded a settlement expense of $47 million ($37 million after-tax) to recognize unrealized losses which were previously included in AOCI. Other Postretirement Benefits Three Months Ended Nine Months Ended September 30, September 30, 2024 2023 2024 2023 (In millions) Interest cost $ 1 $ 1 Expected return on plan assets $ (1) $ (1) (2) (2) Amortization of unrecognized net loss 1 1 1 1 Net periodic benefit $ — $ — $ — $ —

Legal Proceedings

Legal Proceedings	9 Months Ended
Legal Proceedings	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Legal Proceedings	Legal Proceedings Boardwalk Pipelines Litigation On May 25, 2018, plaintiffs Tsemach Mishal and Paul Berger (on behalf of themselves and the purported class, “Plaintiffs”) initiated a purported class action in the Court of Chancery of the State of Delaware (the “Trial Court”) against the following defendants: Boardwalk Pipelines, Boardwalk GP, LP (“General Partner”), Boardwalk GP, LLC and Boardwalk Pipelines Holding Corp. (“BPHC”) (together, “Defendants”), regarding the potential exercise by the General Partner of its right to purchase all of the issued and outstanding common units representing limited partnership interests in Boardwalk Pipelines not already owned by the General Partner or its affiliates. On June 25, 2018, Plaintiffs and Defendants entered into a Stipulation and Agreement of Compromise and Settlement, subject to the approval of the Trial Court (the “Proposed Settlement”). Under the terms of the Proposed Settlement, the lawsuit would be dismissed, and related claims against the Defendants would be released by the Plaintiffs, if BPHC, the sole member of the General Partner, elected to cause the General Partner to exercise its right to purchase the issued and outstanding common units of Boardwalk Pipelines pursuant to Boardwalk Pipelines’ Third Amended and Restated Agreement of Limited Partnership, as amended (“Limited Partnership Agreement”), within a period specified by the Proposed Settlement. On June 29, 2018, the General Partner elected to exercise its right to purchase all of the issued and outstanding common units representing limited partnership interests in Boardwalk Pipelines not already owned by the General Partner or its affiliates pursuant to the Limited Partnership Agreement within the period specified by the Proposed Settlement. The transaction was completed on July 18, 2018. On September 28, 2018, the Trial Court denied approval of the Proposed Settlement. On February 11, 2019, a substitute verified class action complaint was filed in this proceeding, which among other things, added the Parent Company as a Defendant. The Defendants filed a motion to dismiss, which was heard by the Trial Court in July of 2019. In October of 2019, the Trial Court ruled on the motion and granted a partial dismissal, with certain aspects of the case proceeding to trial. A trial was held the week of February 22, 2021 and post-trial oral arguments were held on July 14, 2021. On November 12, 2021, the Trial Court issued a ruling in the case. The Trial Court held that the General Partner breached the Limited Partnership Agreement and awarded Plaintiffs approximately $690 million, plus pre-judgment interest (approximately $166 million), post-judgment interest and attorneys’ fees. The Company believed that the Trial Court ruling included factual and legal errors. Therefore, on January 3, 2022, the Defendants appealed the Trial Court’s ruling to the Supreme Court of the State of Delaware (the “Supreme Court”). On January 17, 2022, the Plaintiffs filed a cross-appeal to the Supreme Court contesting the calculation of damages by the Trial Court. Oral arguments were held on September 14, 2022, and on December 19, 2022, the Supreme Court reversed the Trial Court’s ruling and remanded the case to the Trial Court for further proceedings related to claims not decided by the Trial Court’s ruling. Briefing by the parties at the Trial Court on the remanded issues was completed in September 2023. A hearing on the remanded issues was held at the Trial Court in April 2024. In September 2024, the Trial Court ruled in favor of the Defendants on all of the remanded issues. On October 21, 2024, the Plaintiffs appealed the Trial Court’s ruling on the remanded issues to the Supreme Court. Other Litigation The Company is from time to time party to other litigation arising in the ordinary course of business. While it is difficult to predict the outcome or effect of any litigation, management does not believe that the outcome of any pending litigation, including the Boardwalk Pipelines matter described above, will materially affect the Company’s results of operations or equity.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies CNA Guarantees CNA has provided guarantees, if the primary obligor fails to perform, to holders of structured settlement annuities issued by a previously owned subsidiary. As of September 30, 2024, the potential amount of future payments CNA could be required to pay under these guarantees was approximately $1.4 billion, which will be paid over the lifetime of the annuitants. CNA does not believe any payment is likely under these guarantees, as CNA is the beneficiary of a trust that must be maintained at a level that approximates the discounted reserves for these annuities.

Segments

Segments	9 Months Ended
Segments	Sep. 30, 2024
Segment Reporting [Abstract]
Segments	Segments Loews Corporation has four reportable segments comprised of three individual consolidated operating subsidiaries, CNA, Boardwalk Pipelines and Loews Hotels & Co; and the Corporate segment. The Corporate segment is primarily comprised of Loews Corporation, excluding its subsidiaries, and the equity method of accounting for Altium Packaging LLC. Each of the operating subsidiaries is headed by a chief executive officer who is responsible for the operation of its business and has the duties and authority commensurate with that position. For additional disclosures regarding the composition of Loews Corporation’s segments, see Note 21 of the Consolidated Financial Statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023. The following tables present the reportable segments and their contribution to the Consolidated Condensed Statements of Operations. Amounts presented will not necessarily be the same as those in the individual financial statements of the subsidiaries due to adjustments for purchase accounting, income taxes and noncontrolling interests. Statements of Operations by segment are presented in the following tables. Three Months Ended September 30, 2024 CNA Financial Boardwalk Pipelines Loews Hotels & Co Corporate Total (In millions) Revenues: Insurance premiums $ 2,593 $ 2,593 Net investment income 626 $ 9 $ 2 $ 139 776 Investment losses (10) (10) Non-insurance warranty revenue 401 401 Operating revenues and other 8 474 224 706 Total 3,618 483 226 139 4,466 Expenses: Insurance claims and policyholders’ benefits 2,019 2,019 Amortization of deferred acquisition costs 457 457 Non-insurance warranty expense 387 387 Operating expenses and other 362 332 218 18 930 Equity method loss 9 9 Interest 32 47 17 18 114 Total 3,257 379 235 45 3,916 Income (loss) before income tax 361 104 (9) 94 550 Income tax (expense) benefit (78) (27) 1 (21) (125) Net income (loss) 283 77 (8) 73 425 Amounts attributable to noncontrolling interests (24) (24) Net income (loss) attributable to Loews Corporation $ 259 $ 77 $ (8) $ 73 $ 401 Three Months Ended September 30, 2023 CNA Financial Boardwalk Pipelines Loews Corporate Total (In millions) Revenues: Insurance premiums $ 2,406 $ 2,406 Net investment income 553 $ 6 $ 2 $ 31 592 Investment losses (38) (38) Non-insurance warranty revenue 407 407 Operating revenues and other 8 357 194 559 Total 3,336 363 196 31 3,926 Expenses: Insurance claims and policyholders’ benefits 1,826 1,826 Amortization of deferred acquisition costs 426 426 Non-insurance warranty expense 386 386 Operating expenses and other 338 258 195 69 860 Equity method (income) loss (26) 4 (22) Interest 34 39 3 18 94 Total 3,010 297 172 91 3,570 Income (loss) before income tax 326 66 24 (60) 356 Income tax (expense) benefit (68) (17) (7) 12 (80) Net income (loss) 258 49 17 (48) 276 Amounts attributable to noncontrolling interests (23) (23) Net income (loss) attributable to Loews Corporation $ 235 $ 49 $ 17 $ (48) $ 253 Nine Months Ended September 30, 2024 CNA Financial Boardwalk Pipelines Loews Hotels & Co Corporate Total (In millions) Revenues: Insurance premiums $ 7,532 $ 7,532 Net investment income 1,853 $ 22 $ 7 $ 202 2,084 Investment losses (42) (42) Non-insurance warranty revenue 1,212 1,212 Operating revenues and other 26 1,466 686 2,178 Total 10,581 1,488 693 202 12,964 Expenses: Insurance claims and policyholders’ benefits 5,708 5,708 Amortization of deferred acquisition costs 1,336 1,336 Non-insurance warranty expense 1,169 1,169 Operating expenses and other 1,077 991 652 58 2,778 Equity method (income) loss (59) 15 (44) Interest 101 137 37 56 331 Total 9,391 1,128 630 129 11,278 Income before income tax 1,190 360 63 73 1,686 Income tax expense (252) (92) (20) (17) (381) Net income 938 268 43 56 1,305 Amounts attributable to noncontrolling interests (78) (78) Net income attributable to Loews Corporation $ 860 $ 268 $ 43 $ 56 $ 1,227 Nine Months Ended September 30, 2023 CNA Financial Boardwalk Pipelines Loews Hotels & Co Corporate Total (In millions) Revenues: Insurance premiums $ 7,001 $ 7,001 Net investment income 1,653 $ 11 $ 4 $ 84 1,752 Investment gains (losses) (105) 46 (59) Non-insurance warranty revenue 1,221 1,221 Operating revenues and other 22 1,114 592 1,728 Total 9,792 1,125 642 84 11,643 Expenses: Insurance claims and policyholders’ benefits 5,258 5,258 Amortization of deferred acquisition costs 1,208 1,208 Non-insurance warranty expense 1,154 1,154 Operating expenses and other 1,021 751 572 105 2,449 Equity method (income) loss (98) 9 (89) Interest 93 117 9 61 280 Total 8,734 868 483 175 10,260 Income (loss) before income tax 1,058 257 159 (91) 1,383 Income tax (expense) benefit (220) (66) (44) 15 (315) Net income (loss) 838 191 115 (76) 1,068 Amounts attributable to noncontrolling interests (80) (80) Net income (loss) attributable to Loews Corporation $ 758 $ 191 $ 115 $ (76) $ 988

Subsequent Events

Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2024
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events CNA Employee Retirement Plan Trust Settlement Transaction In October of 2024, a subsidiary of CNA, as a sponsor of the CNA Employee Retirement Plan Trust (the “Plan”), entered into a commitment agreement with Metropolitan Life Insurance Company (the “Insurer”) under which the Plan purchased a nonparticipating single premium group annuity contract that transferred to the Insurer approximately $1,045 million of the Plan’s defined benefit pension obligations. The group annuity contract covers approximately 7,600 Plan participants and beneficiaries (the “Transferred Participants”), representing approximately 60% of the Plan’s obligations. Under the group annuity contract, the Insurer has made an irrevocable commitment, and will be solely responsible, to pay the pension benefits of each Transferred Participant that are due on and after January 1, 2025. The purchase of the group annuity contract was funded directly by assets of the Plan and required no cash or asset contributions from CNA. As a result of the transaction, the Company will recognize a one-time non-cash pretax pension settlement charge of approximately $370 million ($265 million after tax and noncontrolling interests) in the fourth quarter of 2024. This charge is largely driven by the accelerated recognition of the actuarial pension loss from Accumulated other comprehensive income into Net income, which does not impact Shareholders’ equity. This charge will not impact cash flow for the fourth quarter or full year 2024. Fourth Quarter 2024 Hurricane Milton Estimates On October 9, 2024, Hurricane Milton made landfall in Florida. Pretax net catastrophe losses related to Hurricane Milton are currently estimated between approximately $25 million to $55 million, and are anticipated to be reflected in the Company’s fourth quarter 2024 results.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pay vs Performance Disclosure
Net Income (Loss)	$ 401	$ 253	$ 1,227	$ 988

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended	9 Months Ended
Insider Trading Arrangements	Sep. 30, 2024 shares	Sep. 30, 2024 shares
Trading Arrangements, by Individual
Material Terms of Trading Arrangement		The directors of the Company set forth in the table below adopted trading plans on the dates set forth in the table below with respect to the exercise of expiring stock appreciation rights (“SARs”) granted to them as director compensation in 2015. Each plan is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act. Pursuant to each plan, if the market price of the Company’s common stock exceeds the exercise price for the applicable SARs by a specified amount during the applicable trading window, the applicable SARs will be exercised and the net shares received from such exercise will be sold at market prices. For each director, 2,250 SARs expire on each of March 31, 2025, June 30, 2025, September 30, 2025 and December 31, 2025. The trading window under each plan for each such expiration begins on the first trading day of the expiration month and ends on the expiration date. Director Date of Adoption Ann E. Berman August 7, 2024 Charles M. Diker September 3, 2024 Paul J. Fribourg August 6, 2024 Walter L. Harris August 7, 2024 Anthony Welters August 26, 2024 In addition, on August 6, 2024, Andrew H. Tisch, Co-Chairman of the Board of Directors of the Company, adopted a trading plan with respect to the exercise of expiring SARs granted to him as executive compensation in 2015. The plan is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act. Pursuant to the plan, if the market price of the Company’s common stock exceeds the exercise price for the applicable SARs by a specified amount during the applicable trading window, the applicable SARs will be exercised and the net shares received by Mr. Andrew Tisch from such exercise will be sold at market prices. 60,000 of Mr. Andrew Tisch’s SARs expire on January 9, 2025. The trading window under the plan for 30,000 of such SARs begins on January 2, 2025 and the trading window under the plan for the remaining 30,000 of such SARs begins on January 3, 2025. Each trading window ends on the expiration date.
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false
Ann E. Berman [Member]
Trading Arrangements, by Individual
Name	Ann E. Berman
Title	Director
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	August 7, 2024
Arrangement Duration	305 days
Aggregate Available	2,250	2,250
Charles M. Diker [Member]
Trading Arrangements, by Individual
Name	Charles M. Diker
Title	Director
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	September 3, 2024
Arrangement Duration	305 days
Aggregate Available	2,250	2,250
Paul J. Fribourg [Member]
Trading Arrangements, by Individual
Name	Paul J. Fribourg
Title	Director
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	August 6, 2024
Arrangement Duration	305 days
Aggregate Available	2,250	2,250
Walter L. Harris [Member]
Trading Arrangements, by Individual
Name	Walter L. Harris
Title	Director
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	August 7, 2024
Arrangement Duration	305 days
Aggregate Available	2,250	2,250
Anthony Welters [Member]
Trading Arrangements, by Individual
Name	Anthony Welters
Title	Director
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	August 26, 2024
Arrangement Duration	305 days
Aggregate Available	2,250	2,250
Andrew H Tisch [Member]
Trading Arrangements, by Individual
Name	Andrew H. Tisch
Title	Co-Chairman of the Board of Directors
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	August 6, 2024
Expiration Date	January 9, 2025
Aggregate Available	60,000	60,000
Director, March 31, 2025 Trading Arrangement [Member] \| Ann E. Berman [Member]
Trading Arrangements, by Individual
Expiration Date	March 31, 2025
Director, March 31, 2025 Trading Arrangement [Member] \| Charles M. Diker [Member]
Trading Arrangements, by Individual
Expiration Date	March 31, 2025
Director, March 31, 2025 Trading Arrangement [Member] \| Paul J. Fribourg [Member]
Trading Arrangements, by Individual
Expiration Date	March 31, 2025
Director, March 31, 2025 Trading Arrangement [Member] \| Walter L. Harris [Member]
Trading Arrangements, by Individual
Expiration Date	March 31, 2025
Director, March 31, 2025 Trading Arrangement [Member] \| Anthony Welters [Member]
Trading Arrangements, by Individual
Expiration Date	March 31, 2025
Director, June 30, 2025 Trading Arrangement [Member] \| Ann E. Berman [Member]
Trading Arrangements, by Individual
Expiration Date	June 30, 2025
Director, June 30, 2025 Trading Arrangement [Member] \| Charles M. Diker [Member]
Trading Arrangements, by Individual
Expiration Date	June 30, 2025
Director, June 30, 2025 Trading Arrangement [Member] \| Paul J. Fribourg [Member]
Trading Arrangements, by Individual
Expiration Date	June 30, 2025
Director, June 30, 2025 Trading Arrangement [Member] \| Walter L. Harris [Member]
Trading Arrangements, by Individual
Expiration Date	June 30, 2025
Director, June 30, 2025 Trading Arrangement [Member] \| Anthony Welters [Member]
Trading Arrangements, by Individual
Expiration Date	June 30, 2025
Director, September 30, 2025 Trading Arrangement [Member] \| Ann E. Berman [Member]
Trading Arrangements, by Individual
Expiration Date	September 30, 2025
Director, September 30, 2025 Trading Arrangement [Member] \| Charles M. Diker [Member]
Trading Arrangements, by Individual
Expiration Date	September 30, 2025
Director, September 30, 2025 Trading Arrangement [Member] \| Paul J. Fribourg [Member]
Trading Arrangements, by Individual
Expiration Date	September 30, 2025
Director, September 30, 2025 Trading Arrangement [Member] \| Walter L. Harris [Member]
Trading Arrangements, by Individual
Expiration Date	September 30, 2025
Director, September 30, 2025 Trading Arrangement [Member] \| Anthony Welters [Member]
Trading Arrangements, by Individual
Expiration Date	September 30, 2025
Director, December 31, 2025 Trading Arrangement [Member] \| Ann E. Berman [Member]
Trading Arrangements, by Individual
Expiration Date	December 31, 2025
Director, December 31, 2025 Trading Arrangement [Member] \| Charles M. Diker [Member]
Trading Arrangements, by Individual
Expiration Date	December 31, 2025
Director, December 31, 2025 Trading Arrangement [Member] \| Paul J. Fribourg [Member]
Trading Arrangements, by Individual
Expiration Date	December 31, 2025
Director, December 31, 2025 Trading Arrangement [Member] \| Walter L. Harris [Member]
Trading Arrangements, by Individual
Expiration Date	December 31, 2025
Director, December 31, 2025 Trading Arrangement [Member] \| Anthony Welters [Member]
Trading Arrangements, by Individual
Expiration Date	December 31, 2025
January 2, 2025 Arrangement [Member] \| Andrew H Tisch [Member]
Trading Arrangements, by Individual
Arrangement Duration	7 days
Aggregate Available	30,000	30,000
January 3, 2025 Arrangement [Member] \| Andrew H Tisch [Member]
Trading Arrangements, by Individual
Arrangement Duration	6 days
Aggregate Available	30,000	30,000

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
Basis of Presentation (Policies)	Sep. 30, 2024
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation Loews Corporation is a holding company. Its consolidated operating subsidiaries are engaged in the following lines of business: commercial property and casualty insurance (CNA Financial Corporation (“CNA”), an approximately 92% owned subsidiary); transportation and storage of natural gas and natural gas liquids and other hydrocarbons (Boardwalk Pipeline Partners, LP (“Boardwalk Pipelines”), a wholly owned subsidiary) and the operation of a chain of hotels (Loews Hotels Holding Corporation (“Loews Hotels & Co”), a wholly owned subsidiary). Unless the context otherwise requires, as used herein, the term “Company” means Loews Corporation including its consolidated subsidiaries, the term “Parent Company” means Loews Corporation excluding its subsidiaries, the term “Net income (loss) attributable to Loews Corporation” means Net income (loss) attributable to Loews Corporation shareholders and the term “subsidiaries” means Loews Corporation’s consolidated subsidiaries. In the opinion of management, the accompanying unaudited Consolidated Condensed Financial Statements reflect all adjustments (consisting of normal recurring accruals) necessary to present fairly the Company’s financial position as of September 30, 2024 and December 31, 2023, results of operations, comprehensive income (loss) and changes in shareholders’ equity for the three and nine months ended September 30, 2024 and 2023 and cash flows for the nine months ended September 30, 2024 and 2023, in each case in accordance with accounting principles generally accepted in the United States of America (“GAAP”). Results for the interim periods are not necessarily indicative of results for the entire year. These Consolidated Condensed Financial Statements should be read in conjunction with the Consolidated Financial Statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023.
Recently issued Accounting Standards Updates (“ASUs”)	Recently issued Accounting Standards Updates (“ASUs”) - In November of 2023, the Financial Accounting Standards Board (“FASB”) issued ASU 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures.” The updated accounting guidance requires enhanced reportable segment disclosures, primarily related to significant segment expenses which are regularly provided to the chief operating decision maker (“CODM”). The guidance is effective for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024. Retrospective application is required and early adoption is permitted. The Company is currently evaluating the effect the updated guidance will have on its financial statement disclosures and expects to disclose additional quantitative and qualitative information related to segment expenses regularly provided to the CODM that are included in the segment measures of profit or loss. In December of 2023, the FASB issued ASU 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures.” The updated accounting guidance requires expanded income tax disclosures, including the disaggregation of existing disclosures related to the effective tax rate reconciliation and income taxes paid. The guidance is effective for fiscal years beginning after December 15, 2024. Prospective application is required, with retrospective application permitted. The Company is currently evaluating the effect the updated guidance will have on its financial statement disclosures.

Investments (Tables)

Investments (Tables)	9 Months Ended
Investments (Tables)	Sep. 30, 2024
Investments, Debt and Equity Securities [Abstract]
Schedule of Net Investment Income	Net investment income is as follows: Three Months Ended Nine Months Ended September 30, September 30, 2024 2023 2024 2023 (In millions) Fixed maturity securities $ 517 $ 491 $ 1,530 $ 1,443 Limited partnership investments 67 29 195 111 Short-term investments 21 24 70 54 Equity securities (a) 21 9 56 42 Income from trading portfolio (a) 141 32 210 91 Other 33 30 95 78 Total investment income 800 615 2,156 1,819 Investment expenses (24) (23) (72) (67) Net investment income $ 776 $ 592 $ 2,084 $ 1,752 (a) Net investment income (loss) recognized due to the change in fair value of equity and trading portfolio securities held as of September 30, 2024 and 2023 $ 108 $ (14) $ 123 $ 3
Schedule of Investment Gains (Losses)	Investment gains (losses) are as follows: Three Months Ended Nine Months Ended September 30, September 30, 2024 2023 2024 2023 (In millions) Fixed maturity securities: Gross gains $ 11 $ 12 $ 38 $ 55 Gross losses (33) (49) (104) (141) Investment losses on fixed maturity securities (22) (37) (66) (86) Equity securities (a) 13 2 25 (9) Short-term investments and other (1) (3) (1) (10) Gain on acquisition of a joint venture 46 Investment losses $ (10) $ (38) $ (42) $ (59) (a) Investment gains (losses) recognized due to the change in fair value of non-redeemable preferred stock included within equity securities held as of September 30, 2024 and 2023 $ 13 $ 2 $ 24 $ 2
Schedule of Impairment Losses (Gains) on Earnings	The available-for-sale impairment losses (gains) recognized in earnings by asset type are presented in the following table. The table includes losses (gains) on securities with an intention to sell and changes in the allowance for credit losses on securities since acquisition date: Three Months Ended Nine Months Ended September 30, September 30, 2024 2023 2024 2023 (In millions) Fixed maturity securities available-for-sale: Corporate and other bonds $ 8 $ 8 $ 23 $ 25 Asset-backed 4 4 9 12 Impairment losses recognized in earnings $ 12 $ 12 $ 32 $ 37
Schedule of Amortized Cost and Fair Values of Fixed Maturity Securities	The following tables present a summary of fixed maturity securities: September 30, 2024 Cost or Amortized Cost Gross Unrealized Gross Unrealized Allowance Estimated (In millions) Fixed maturity securities: Corporate and other bonds $ 25,872 $ 826 $ 900 $ 6 $ 25,792 States, municipalities and political 7,406 359 617 7,148 Asset-backed: Residential mortgage-backed 3,684 32 362 3,354 Commercial mortgage-backed 1,816 14 141 1,689 Other asset-backed 3,743 40 186 12 3,585 Total asset-backed 9,243 86 689 12 8,628 U.S. Treasury and obligations of 224 2 4 222 Foreign government 755 8 26 737 Fixed maturities available-for-sale $ 43,500 $ 1,281 $ 2,236 $ 18 $ 42,527 Fixed maturities trading 528 528 Total fixed maturity securities $ 44,028 $ 1,281 $ 2,236 $ 18 $ 43,055 December 31, 2023 Fixed maturity securities: Corporate and other bonds $ 25,020 $ 597 $ 1,345 $ 4 $ 24,268 States, municipalities and political 7,713 382 703 7,392 Asset-backed: Residential mortgage-backed 3,411 16 425 3,002 Commercial mortgage-backed 1,862 7 230 8 1,631 Other asset-backed 3,515 13 256 4 3,268 Total asset-backed 8,788 36 911 12 7,901 U.S. Treasury and obligations of 152 1 2 151 Foreign government 741 6 34 713 Fixed maturities available-for-sale $ 42,414 $ 1,022 $ 2,995 $ 16 $ 40,425 Fixed maturities trading 201 201 Total fixed maturity securities $ 42,615 $ 1,022 $ 2,995 $ 16 $ 40,626
Schedule of Available-for-sale Fixed Maturity Securities in Gross Unrealized Loss Position	The available-for-sale fixed maturity securities in a gross unrealized loss position for which an allowance for credit losses has not been recorded are as follows: Less than 12 Months 12 Months or Longer Total September 30, 2024 Estimated Fair Value Gross Unrealized Losses Estimated Fair Value Gross Unrealized Losses Estimated Fair Value Gross Unrealized Losses (In millions) Fixed maturity securities: Corporate and other bonds $ 1,664 $ 31 $ 11,240 $ 869 $ 12,904 $ 900 States, municipalities and political 422 7 3,155 610 3,577 617 Asset-backed: Residential mortgage-backed 130 2 2,162 360 2,292 362 Commercial mortgage-backed 112 1,134 141 1,246 141 Other asset-backed 151 4 1,638 182 1,789 186 Total asset-backed 393 6 4,934 683 5,327 689 U.S. Treasury and obligations of 45 2 45 2 90 4 Foreign government 99 1 403 25 502 26 Total fixed maturity securities $ 2,623 $ 47 $ 19,777 $ 2,189 $ 22,400 $ 2,236 December 31, 2023 Fixed maturity securities: Corporate and other bonds $ 1,943 $ 37 $ 13,406 $ 1,308 $ 15,349 $ 1,345 States, municipalities and political 598 18 3,104 685 3,702 703 Asset-backed: Residential mortgage-backed 233 4 2,212 421 2,445 425 Commercial mortgage-backed 200 5 1,184 225 1,384 230 Other asset-backed 392 8 1,869 248 2,261 256 Total asset-backed 825 17 5,265 894 6,090 911 U.S. Treasury and obligations of 65 1 23 1 88 2 Foreign government 52 1 450 33 502 34 Total fixed maturity securities $ 3,483 $ 74 $ 22,248 $ 2,921 $ 25,731 $ 2,995 The following table presents the estimated fair value and gross unrealized losses of available-for-sale fixed maturity securities in a gross unrealized loss position for which an allowance for credit loss has not been recorded, by ratings distribution. September 30, 2024 December 31, 2023 Estimated Fair Value Gross Unrealized Losses Estimated Fair Value Gross Unrealized Losses (In millions) U.S. Government, Government agencies and Government-sponsored enterprises $ 2,127 $ 265 $ 2,273 $ 309 AAA 1,277 221 1,524 261 AA 3,641 547 3,817 658 A 5,229 405 5,652 517 BBB 9,243 689 11,523 1,095 Non-investment grade 883 109 942 155 Total $ 22,400 $ 2,236 $ 25,731 $ 2,995
Schedule of Allowance for Credit Losses	The following tables present the activity related to the allowance on available-for-sale securities with credit impairments and purchased credit-deteriorated (“PCD”) assets. Accrued interest receivable on available-for-sale fixed maturity securities totaled $451 million, $435 million and $430 million as of September 30, 2024, December 31, 2023 and September 30, 2023 and are excluded from the estimate of expected credit losses and the amortized cost basis in the tables within this Note. Three months ended September 30, 2024 Corporate and Other Bonds Asset-backed Total (In millions) Allowance for credit losses: Balance as of July 1, 2024 $ — $ 17 $ 17 Additions to the allowance for credit losses: Securities for which credit losses were not previously recorded 4 4 Available-for-sale securities accounted for as PCD assets 2 2 Reductions to the allowance for credit losses: Write-offs charged against the allowance 9 9 Additional increases to the allowance for credit losses on securities that had an allowance recorded in a previous period 4 4 Total allowance for credit losses $ 6 $ 12 $ 18 Three months ended September 30, 2023 Corporate and Other Bonds Asset-backed Total (In millions) Allowance for credit losses: Balance as of July 1, 2023 $ 13 $ 9 $ 22 Additions to the allowance for credit losses: Securities for which credit losses were not previously recorded 5 5 Available-for-sale securities accounted for as PCD assets 2 2 Reductions to the allowance for credit losses: Write-offs charged against the allowance 15 15 Additional increases to the allowance for credit losses on securities that had an allowance recorded in a previous period 4 4 Total allowance for credit losses $ 5 $ 13 $ 18 Nine months ended September 30, 2024 Corporate and Other Bonds Asset-backed Total (In millions) Allowance for credit losses: Balance as of January 1, 2024 $ 4 $ 12 $ 16 Additions to the allowance for credit losses: Securities for which credit losses were not previously recorded 4 4 Available-for-sale securities accounted for as PCD assets 2 2 Reductions to the allowance for credit losses: Securities sold during the period (realized) 3 1 4 Intent to sell or more likely than not will be required to sell the security before recovery of its amortized cost basis 1 1 Write-offs charged against the allowance 9 9 Additional increases to the allowance for credit losses on securities that had an allowance recorded in a previous period 10 10 Total allowance for credit losses $ 6 $ 12 $ 18 Nine months ended September 30, 2023 Corporate and Other Bonds Asset-backed Total (In millions) Allowance for credit losses: Balance as of January 1, 2023 $ — $ 1 $ 1 Additions to the allowance for credit losses: Securities for which credit losses were not previously recorded 6 7 13 Available-for-sale securities accounted for as PCD assets 22 22 Reductions to the allowance for credit losses: Securities sold during the period (realized) 6 6 Intent to sell or more likely than not will be required to sell the 3 3 Write-offs charged against the allowance 15 15 Additional increases to the allowance for credit losses on securities that had an allowance recorded in a previous period 1 5 6 Total allowance for credit losses $ 5 $ 13 $ 18
Schedule of Available-for-sale Fixed Maturity Securities by Contractual Maturity	The following table presents available-for-sale fixed maturity securities by contractual maturity. September 30, 2024 December 31, 2023 Cost or Amortized Cost Estimated Fair Cost or Amortized Cost Estimated (In millions) Due in one year or less $ 1,585 $ 1,565 $ 1,121 $ 1,091 Due after one year through five years 11,948 11,800 11,563 11,180 Due after five years through ten years 13,282 12,907 13,359 12,573 Due after ten years 16,685 16,255 16,371 15,581 Total $ 43,500 $ 42,527 $ 42,414 $ 40,425
Schedule of Amortized Cost Basis of Mortgage Loans for Each Credit Quality Indicator by Year of Origination	The following table presents the amortized cost basis of mortgage loans for each credit quality indicator by year of origination. The primary credit quality indicators utilized are debt service coverage ratios (“DSCR”) and loan-to-value (“LTV”) ratios. Mortgage Loans Amortized Cost Basis by Origination Year (a) As of September 30, 2024 2024 2023 2022 2021 2020 Prior Total (In millions) DSCR ≥1.6x LTV less than 55% $ 33 $ 9 $ 2 $ 97 $ 242 $ 383 LTV 55% to 65% 5 5 LTV greater than 65% 30 12 42 DSCR 1.2x - 1.6x LTV less than 55% 28 5 13 50 96 LTV 55% to 65% $ 43 20 36 36 4 31 170 LTV greater than 65% 13 64 20 97 DSCR ≤1.2x LTV less than 55% — LTV 55% to 65% 32 75 41 148 LTV greater than 65% 28 21 48 97 Total $ 43 $ 126 $ 247 $ 76 $ 134 $ 412 $ 1,038 (a) The values in the table above reflect DSCR on a standardized amortization period and LTV ratios based on the most recent appraised values trended forward using changes in a commercial real estate price index.
Schedule of Aggregate Contractual or Notional Amounts and Estimated Fair Values Related to Derivative Financial Instruments	A summary of the aggregate contractual or notional amounts and gross estimated fair values related to derivative financial instruments follows. The contractual or notional amounts for derivatives are used to calculate the exchange of contractual payments under related agreements and may not be representative of the potential for gain or loss on these instruments. Gross estimated fair values of derivative positions are currently presented in Equity securities, Receivables and Payable to brokers on the Consolidated Condensed Balance Sheets. September 30, 2024 December 31, 2023 Contractual/Notional Amount Estimated Fair Value Contractual/Notional Amount Estimated Fair Value Asset (Liability) Asset (Liability) (In millions) Without hedge designation: Equity markets: Options – purchased $ 338 $ 1 $ 202 $ 1 Futures – short 158 $ (1) 116 Warrants 1 1 84 3 Interest rate swaps 300 6 300 13 Currency forwards 13 $ (1)

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
Fair Value (Tables)	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis	Assets and liabilities measured at fair value on a recurring basis are summarized in the following tables. Corporate bonds and other includes obligations of the United States of America (“U.S.”) Treasury, government-sponsored enterprises, foreign governments and redeemable preferred stock. September 30, 2024 Level 1 Level 2 Level 3 Total (In millions) Fixed maturity securities: Corporate bonds and other $ 225 $ 25,289 $ 1,237 $ 26,751 States, municipalities and political subdivisions 7,103 45 7,148 Asset-backed 7,713 915 8,628 Fixed maturities available-for-sale 225 40,105 2,197 42,527 Fixed maturities trading 528 528 Total fixed maturities $ 753 $ 40,105 $ 2,197 $ 43,055 Equity securities $ 765 $ 436 $ 14 $ 1,215 Short-term and other 5,043 30 5,073 Receivables 6 6 Payable to brokers (57) (57) December 31, 2023 Fixed maturity securities: Corporate bonds and other $ 161 $ 23,926 $ 1,045 $ 25,132 States, municipalities and political subdivisions 7,348 44 7,392 Asset-backed 7,000 901 7,901 Fixed maturities available-for-sale 161 38,274 1,990 40,425 Fixed maturities trading 201 201 Total fixed maturities $ 362 $ 38,274 $ 1,990 $ 40,626 Equity securities $ 586 $ 440 $ 24 $ 1,050 Short-term and other 4,215 32 4,247 Receivables 13 13 Payable to brokers (62) (62)
Schedule of Reconciliations of Assets and Liabilities Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs	The following tables present reconciliations for all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three and nine months ended September 30, 2024 and 2023: Net Realized Investment Gains (Losses) and Net Change in Unrealized Investment Gains (Losses) Unrealized Gains (Losses) Recognized in Net Income (Loss) on Level 3 Assets and Liabilities Held at September 30 Unrealized Gains (Losses) Recognized in Other Comprehensive Income (Loss) on Level 3 Assets and Liabilities Held at September 30 2024 Balance, July 1 Included in Net Income Included in OCI Purchases Sales Settlements Transfers into Transfers out of Level 3 Balance, September 30 (In millions) Fixed maturity securities: Corporate bonds and other $ 1,129 $ 59 $ 83 $ (10) $ (24) $ 1,237 $ 57 States, municipalities and political subdivisions 43 2 45 2 Asset-backed 887 $ 1 30 38 (23) $ (18) 915 30 Fixed maturities available-for-sale $ 2,059 $ 1 $ 91 $ 121 $ (10) $ (47) $ — $ (18) $ 2,197 $ — $ 89 Equity securities $ 14 $ 14 Net Realized Investment Gains (Losses) and Net Change in Unrealized Investment Gains (Losses) Unrealized Gains (Losses) Recognized in Net Income (Loss) on Level 3 Assets and Liabilities Held at September 30 Unrealized Gains (Losses) Recognized in Other Comprehensive Income (Loss) on Level 3 Assets and Liabilities Held at September 30 2023 Balance, July 1 Included in Net Income Included in OCI Purchases Sales Settlements Transfers into Transfers out of Level 3 Balance, September 30 (In millions) Fixed maturity securities: Corporate bonds and other $ 971 $ (36) $ 29 $ (19) $ 945 $ (36) States, municipalities and political subdivisions 43 (2) 41 (2) Asset-backed 883 $ 1 (28) 61 (13) $ (7) 897 (28) Fixed maturities available-for-sale $ 1,897 $ 1 $ (66) $ 90 $ — $ (32) $ — $ (7) $ 1,883 $ — $ (66) Equity securities $ 26 $ (1) $ (2) $ 23 $ (1) Net Realized Investment Gains (Losses) and Net Change in Unrealized Investment Gains (Losses) Unrealized Gains (Losses) Recognized in Net Income (Loss) on Level 3 Assets and Liabilities Held at September 30 Unrealized Gains (Losses) Recognized in Other Comprehensive Income (Loss) on Level 3 Assets and Liabilities Held at September 30 2024 Balance, January 1 Included in Net Income Included in OCI Purchases Sales Settlements Transfers into Transfers out of Level 3 Balance, September 30 (In millions) Fixed maturity securities: Corporate bonds and other $ 1,045 $ 39 $ 229 $ (10) $ (77) $ 11 $ 1,237 $ 34 States, municipalities and political subdivisions 44 1 45 1 Asset-backed 901 $ 5 14 111 (14) (65) $ (37) 915 14 Fixed maturities available-for-sale $ 1,990 $ 5 $ 54 $ 340 $ (24) $ (142) $ 11 $ (37) $ 2,197 $ — $ 49 Equity securities $ 24 $ 6 $ 3 $ (19) $ 14 $ 2 Net Realized Investment Gains (Losses) and Net Change in Unrealized Investment Gains (Losses) Unrealized Gains (Losses) Recognized in Net Income (Loss) on Level 3 Assets and Liabilities Held at September 30 Unrealized Gains (Losses) Recognized in Other Comprehensive Income (Loss) on Level 3 Assets and Liabilities Held at September 30 2023 Balance, January 1 Included in Net Income Included in OCI Purchases Sales Settlements Transfers into Transfers out of Level 3 Balance, September 30 (In millions) Fixed maturity securities: Corporate bonds and other $ 810 $ (27) $ 178 $ (27) $ 11 $ 945 $ (27) States, municipalities and political subdivisions 43 (2) 41 (2) Asset-backed 788 $ 10 (28) 203 (39) 23 $ (60) 897 (28) Fixed maturities available-for-sale $ 1,641 $ 10 $ (57) $ 381 $ — $ (66) $ 34 $ (60) $ 1,883 $ — $ (57) Equity securities $ 35 $ (8) $ (4) $ 23 $ (8) Net investment gains and losses are reported in Net income as follows: Major Category of Assets and Liabilities Consolidated Condensed Statements of Operations Line Items Fixed maturity securities available-for-sale Investment gains (losses) Fixed maturity securities trading Net investment income Equity securities Investment gains (losses) and Net investment income Other invested assets Investment gains (losses) and Net investment income Derivative financial instruments held in a trading portfolio Net investment income Derivative financial instruments, other Investment gains (losses) and Operating revenues and other
Schedule of Significant Unobservable Inputs	The following tables present quantitative information about the significant unobservable inputs utilized in the fair value measurement of Level 3 assets. Valuations for assets and liabilities not presented in the tables below are primarily based on broker/dealer quotes for which there is a lack of transparency as to inputs used to develop the valuations. The quantitative detail of unobservable inputs from these broker quotes is neither provided nor reasonably available. The weighted average rate is calculated based on fair value. September 30, 2024 Estimated Valuation Techniques Unobservable Inputs Range (Weighted Average) (In millions) Fixed maturity securities $ 1,713 Discounted cash flow Credit spread 1 % — 6 % (2 %) December 31, 2023 Fixed maturity securities $ 1,495 Discounted cash flow Credit spread 1 % — 7 % (2 %)
Schedule of Financial Assets and Liabilities not Measured at Fair Value	The carrying amount, estimated fair value and the level of the fair value hierarchy of the financial assets and liabilities which are not measured at fair value on the Consolidated Condensed Balance Sheets are presented in the following tables. The carrying amounts and estimated fair values of short-term debt and long-term debt exclude finance lease obligations. The carrying amounts reported on the Consolidated Condensed Balance Sheets for cash and short-term investments not carried at fair value and certain other assets and liabilities approximate fair value due to the short-term nature of these items. Carrying Amount Estimated Fair Value September 30, 2024 Level 1 Level 2 Level 3 Total (In millions) Assets: Other invested assets, primarily mortgage loans $ 1,003 $ 988 $ 988 Liabilities: Short-term debt 712 $ 599 108 707 Long-term debt 8,818 7,892 840 8,732 December 31, 2023 Assets: Other invested assets, primarily mortgage loans $ 1,035 $ 997 $ 997 Liabilities: Short-term debt 1,083 $ 546 520 1,066 Long-term debt 7,915 7,255 385 7,640

Claim and Claim Adjustment Ex_2

Claim and Claim Adjustment Expense Reserves (Tables)	9 Months Ended
Claim and Claim Adjustment Expense Reserves (Tables)	Sep. 30, 2024
Insurance [Abstract]
Schedule of Reconciliation of Claim and Claim Adjustment Expense Reserves	The following table presents a reconciliation between beginning and ending claim and claim adjustment expense reserves. Nine Months Ended September 30 2024 2023 (In millions) Reserves, beginning of year: Gross $ 23,304 $ 22,120 Ceded 5,141 5,191 Net reserves, beginning of year 18,163 16,929 Net incurred claim and claim adjustment expenses: Provision for insured events of current year 4,706 4,221 Increase (decrease) in provision for insured events of prior years 26 43 Amortization of discount 30 33 Total net incurred (a) 4,762 4,297 Net payments attributable to: Current year events (655) (588) Prior year events (3,189) (2,953) Total net payments (3,844) (3,541) Foreign currency translation adjustment and other 35 (30) Net reserves, end of period 19,116 17,655 Ceded reserves, end of period 5,442 5,181 Gross reserves, end of period $ 24,558 $ 22,836 (a) Total net incurred does not agree to Insurance claims and policyholders’ benefits as reflected on the Consolidated Condensed Statements of Operations due to amounts related to retroactive reinsurance deferred gain accounting, uncollectible reinsurance, benefit expenses related to future policy benefits and policyholders’ dividends, which are not reflected in the table above.
Schedule of Net Prior Year Loss Reserve Development in Property and Casualty Operations	The following table and discussion present details of the net prior year loss reserve development in Property & Casualty Operations and Other Insurance Operations: Three Months Ended Nine Months Ended September 30, September 30, 2024 2023 2024 2023 (In millions) Medical professional liability $ (2) $ 9 Other professional liability and management liability $ 11 $ 17 28 16 Surety (20) (21) (46) (28) Warranty 7 (2) 20 (11) Commercial auto 25 46 11 General liability 28 47 70 Workers’ compensation (57) (2) (106) (100) Other property and casualty operations 1 1 (11) 22 Other insurance operations 22 20 57 55 Total pretax (favorable) unfavorable development $ 17 $ 13 $ 33 $ 44

Future Policy Benefits Reserv_2

Future Policy Benefits Reserves (Tables)	9 Months Ended
Future Policy Benefits Reserves (Tables)	Sep. 30, 2024
Insurance [Abstract]
Schedule of Liability for Future Policy Benefit	The following table summarizes balances and changes in the LFPB: 2024 2023 (In millions) Present value of future net premiums Balance, January 1 $ 3,710 $ 3,993 Effect of changes in discount rate (125) (74) Balance, January 1, at original locked in discount rate 3,585 3,919 Effect of changes in cash flow assumptions (a) 111 28 Effect of actual variances from expected experience (a) (40) (112) Adjusted balance, January 1 3,656 3,835 Interest accrual 139 153 Net premiums: earned during period (317) (332) Balance, end of period at original locked in discount rate 3,478 3,656 Effect of changes in discount rate 147 (67) Balance, September 30 $ 3,625 $ 3,589 Present value of future benefits & expenses Balance, January 1 $ 17,669 $ 17,472 Effect of changes in discount rate (578) (125) Balance, January 1, at original locked in discount rate 17,091 17,347 Effect of changes in cash flow assumptions (a) 126 36 Effect of actual variances from expected experience (a) 33 (45) Adjusted balance, January 1 17,250 17,338 Interest accrual 693 723 Benefit & expense payments (883) (945) Balance, end of period at original locked in discount rate 17,060 17,116 Effect of changes in discount rate 612 (873) Balance, September 30 $ 17,672 $ 16,243 Net LFPB, September 30 $ 14,047 $ 12,654 (a) As of September 30, 2024 and 2023 , the re-measurement gain (loss) of $(88) million and $(75) million presented parenthetically on the Consolidated Condensed Statement of Operations is comprised of the effect of changes in cash flow assumptions and the effect of actual variances from expected experience. The following table presents earned premiums and interest expense associated with the long-term care business recognized on the Condensed Consolidated Statement of Operations. Three Months Ended Nine Months Ended September 30, September 30, 2024 2023 2024 2023 (In millions) Earned premiums $ 110 $ 112 $ 329 $ 340 Interest expense 185 191 554 570 The following table presents undiscounted expected future benefit and expense payments and undiscounted expected future gross premiums. September 30, 2024 2023 (In millions) Expected future benefit and expense payments $ 32,009 $ 33,217 Expected future gross premiums 5,305 5,557 The weighted average interest rates in the table below are calculated based on the rate used to discount all future cash flows. September 30, December 31, 2024 2023 2023 Original locked in discount rate 5.20 % 5.24 % 5.22 % Upper-medium grade fixed income instrument discount rate 4.90 5.78 4.94

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	9 Months Ended
Shareholders' Equity (Tables)	Sep. 30, 2024
Equity [Abstract]
Schedule of Components of Accumulated Other Comprehensive Income (Loss)	The tables below present the changes in Accumulated other comprehensive income (loss) (“AOCI”) by component for the three and nine months ended September 30, 2023 and 2024 : Net Unrealized Gains (Losses) on Investments with an Allowance for Credit Losses Net Unrealized Gains (Losses) on Other Investments Cumulative Unrealized Gains (Losses) on Cash Flow Hedges Pension and Postretirement Benefits Foreign Currency Translation Total Accumulated Other Comprehensive Income (Loss) (In millions) Balance, July 1, 2023 $ (16) $ (2,238) $ (163) $ 20 $ (609) $ (154) $ (3,160) Other comprehensive income (loss) before reclassifications, after tax of $3, $295, $(217), $(2), $0 and $0 (9) (1,105) 818 (1) (55) (352) Reclassification of losses from accumulated other comprehensive loss, after tax of $(2), $(6), $0, $0, $(11) and $0 8 21 40 69 Other comprehensive income (loss) (1) (1,084) 818 (1) 40 (55) (283) Amounts attributable to noncontrolling interests 1 95 (69) (1) 5 31 Purchase of CNA shares (46) (1) (10) (4) (61) Balance, September 30, 2023 $ (16) $ (3,273) $ 585 $ 19 $ (580) $ (208) $ (3,473) Balance, July 1, 2024 $ (10) $ (1,903) $ 234 $ 10 $ (525) $ (189) $ (2,383) Other comprehensive income (loss) before reclassifications, after tax of $3, $(337), $165, $3, $0 and $0 (9) 1,253 (623) (7) 1 64 679 Reclassification of losses from accumulated other comprehensive loss, after tax of $(2), $(3), $0, $0, $(3) and $0 6 11 8 25 Other comprehensive income (loss) (3) 1,264 (623) (7) 9 64 704 Amounts attributable to noncontrolling interests (105) 52 (1) (5) (59) Balance, September 30, 2024 $ (13) $ (744) $ (337) $ 3 $ (517) $ (130) $ (1,738) Net Unrealized Gains (Losses) on Investments with an Allowance for Credit Losses Net Unrealized Gains (Losses) on Other Investments Cumulative Unrealized Gains (Losses) on Cash Flow Hedges Pension and Postretirement Benefits Foreign Currency Translation Total Accumulated Other Comprehensive Income (Loss) (In millions) Balance, January 1, 2023, as reported $ (7) $ (2,469) $ — $ 14 $ (622) $ (200) $ (3,284) Cumulative effect adjustments from changes in accounting standard s, after tax of $0, $0, $11, $0, $0 and $0 (36) (36) Balance, January 1, 2023, as adjusted (7) (2,469) (36) 14 (622) (200) (3,320) Other comprehensive income (loss) before reclassifications, after tax of $7, $235, $(180), $(1), $0 and $0 (25) (880) 678 5 (4) (226) Reclassification of losses from accumulated other comprehensive loss, after tax of $(4), $(14), $0, $0, $(15) and $0 15 53 55 123 Other comprehensive income (loss) (10) (827) 678 5 55 (4) (103) Amounts attributable to noncontrolling interests 1 69 (56) (3) 11 Purchase of CNA shares (46) (1) (10) (4) (61) Balance, September 30, 2023 $ (16) $ (3,273) $ 585 $ 19 $ (580) $ (208) $ (3,473) Balance, January 1, 2024 $ (12) $ (1,483) $ (329) $ 9 $ (533) $ (149) $ (2,497) Other comprehensive income (loss) before reclassifications, after tax of $4, $(206), $2, $3, $0 and $0 (14) 764 (9) (6) 1 21 757 Reclassification of losses from accumulated other comprehensive loss, after tax of $(4), $(10), $0, $0, $(5) and $0 13 39 20 72 Other comprehensive income (loss) (1) 803 (9) (6) 21 21 829 Amounts attributable to noncontrolling interests (67) 1 (2) (2) (70) Other 3 (3) — Balance, September 30, 2024 $ (13) $ (744) $ (337) $ 3 $ (517) $ (130) $ (1,738)
Schedule of Reclassification out of Accumulated Other Comprehensive Income	Amounts reclassified from AOCI shown above are reported in Net income (loss) as follows: Major Category of AOCI Affected Line Item Net unrealized gains (losses) on investments with an allowance for credit losses and Net unrealized gains (losses) on other investments Investment gains (losses) Unrealized gains (losses) on cash flow hedges Operating revenues and other, Interest expense and Operating expenses and other Pension and postretirement benefits Operating expenses and other

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	9 Months Ended
Revenue from Contracts with Customers (Tables)	Sep. 30, 2024
Revenue from Contract with Customer [Abstract]
Schedule of Disaggregation of Revenue	The following table presents revenues from contracts with customers disaggregated by revenue type along with the reportable segment and a reconciliation to Operating revenues and other as reported in Note 12 : Three Months Ended Nine Months Ended September 30, September 30, 2024 2023 2024 2023 (In millions) Non-insurance warranty – CNA Financial $ 401 $ 407 $ 1,212 $ 1,221 Transportation and storage of natural gas and NGLs and ethane supply and transportation services – Boardwalk Pipelines $ 463 $ 347 $ 1,431 $ 1,083 Lodging and related services – Loews Hotels & Co 220 190 673 577 Total revenues from contracts with customers 683 537 2,104 1,660 Other revenues 23 22 74 68 Operating revenues and other $ 706 $ 559 $ 2,178 $ 1,728

Benefit Plans (Tables)

Benefit Plans (Tables)	9 Months Ended
Benefit Plans (Tables)	Sep. 30, 2024
Retirement Benefits [Abstract]
Schedule of Net Periodic (Benefit) Cost Components	The following tables present the components of net periodic (benefit) cost for the defined benefit plans: Pension Benefits Three Months Ended Nine Months Ended September 30, September 30, 2024 2023 2024 2023 (In millions) Service cost $ 1 $ 1 $ 2 $ 2 Interest cost 23 28 72 84 Expected return on plan assets (29) (32) (88) (96) Amortization of unrecognized net loss 7 9 22 27 Settlements 4 47 4 48 Net periodic cost $ 6 $ 53 $ 12 $ 65 Other Postretirement Benefits Three Months Ended Nine Months Ended September 30, September 30, 2024 2023 2024 2023 (In millions) Interest cost $ 1 $ 1 Expected return on plan assets $ (1) $ (1) (2) (2) Amortization of unrecognized net loss 1 1 1 1 Net periodic benefit $ — $ — $ — $ —

Segments (Tables)

Segments (Tables)	9 Months Ended
Segments (Tables)	Sep. 30, 2024
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	Statements of Operations by segment are presented in the following tables. Three Months Ended September 30, 2024 CNA Financial Boardwalk Pipelines Loews Hotels & Co Corporate Total (In millions) Revenues: Insurance premiums $ 2,593 $ 2,593 Net investment income 626 $ 9 $ 2 $ 139 776 Investment losses (10) (10) Non-insurance warranty revenue 401 401 Operating revenues and other 8 474 224 706 Total 3,618 483 226 139 4,466 Expenses: Insurance claims and policyholders’ benefits 2,019 2,019 Amortization of deferred acquisition costs 457 457 Non-insurance warranty expense 387 387 Operating expenses and other 362 332 218 18 930 Equity method loss 9 9 Interest 32 47 17 18 114 Total 3,257 379 235 45 3,916 Income (loss) before income tax 361 104 (9) 94 550 Income tax (expense) benefit (78) (27) 1 (21) (125) Net income (loss) 283 77 (8) 73 425 Amounts attributable to noncontrolling interests (24) (24) Net income (loss) attributable to Loews Corporation $ 259 $ 77 $ (8) $ 73 $ 401 Three Months Ended September 30, 2023 CNA Financial Boardwalk Pipelines Loews Corporate Total (In millions) Revenues: Insurance premiums $ 2,406 $ 2,406 Net investment income 553 $ 6 $ 2 $ 31 592 Investment losses (38) (38) Non-insurance warranty revenue 407 407 Operating revenues and other 8 357 194 559 Total 3,336 363 196 31 3,926 Expenses: Insurance claims and policyholders’ benefits 1,826 1,826 Amortization of deferred acquisition costs 426 426 Non-insurance warranty expense 386 386 Operating expenses and other 338 258 195 69 860 Equity method (income) loss (26) 4 (22) Interest 34 39 3 18 94 Total 3,010 297 172 91 3,570 Income (loss) before income tax 326 66 24 (60) 356 Income tax (expense) benefit (68) (17) (7) 12 (80) Net income (loss) 258 49 17 (48) 276 Amounts attributable to noncontrolling interests (23) (23) Net income (loss) attributable to Loews Corporation $ 235 $ 49 $ 17 $ (48) $ 253 Nine Months Ended September 30, 2024 CNA Financial Boardwalk Pipelines Loews Hotels & Co Corporate Total (In millions) Revenues: Insurance premiums $ 7,532 $ 7,532 Net investment income 1,853 $ 22 $ 7 $ 202 2,084 Investment losses (42) (42) Non-insurance warranty revenue 1,212 1,212 Operating revenues and other 26 1,466 686 2,178 Total 10,581 1,488 693 202 12,964 Expenses: Insurance claims and policyholders’ benefits 5,708 5,708 Amortization of deferred acquisition costs 1,336 1,336 Non-insurance warranty expense 1,169 1,169 Operating expenses and other 1,077 991 652 58 2,778 Equity method (income) loss (59) 15 (44) Interest 101 137 37 56 331 Total 9,391 1,128 630 129 11,278 Income before income tax 1,190 360 63 73 1,686 Income tax expense (252) (92) (20) (17) (381) Net income 938 268 43 56 1,305 Amounts attributable to noncontrolling interests (78) (78) Net income attributable to Loews Corporation $ 860 $ 268 $ 43 $ 56 $ 1,227 Nine Months Ended September 30, 2023 CNA Financial Boardwalk Pipelines Loews Hotels & Co Corporate Total (In millions) Revenues: Insurance premiums $ 7,001 $ 7,001 Net investment income 1,653 $ 11 $ 4 $ 84 1,752 Investment gains (losses) (105) 46 (59) Non-insurance warranty revenue 1,221 1,221 Operating revenues and other 22 1,114 592 1,728 Total 9,792 1,125 642 84 11,643 Expenses: Insurance claims and policyholders’ benefits 5,258 5,258 Amortization of deferred acquisition costs 1,208 1,208 Non-insurance warranty expense 1,154 1,154 Operating expenses and other 1,021 751 572 105 2,449 Equity method (income) loss (98) 9 (89) Interest 93 117 9 61 280 Total 8,734 868 483 175 10,260 Income (loss) before income tax 1,058 257 159 (91) 1,383 Income tax (expense) benefit (220) (66) (44) 15 (315) Net income (loss) 838 191 115 (76) 1,068 Amounts attributable to noncontrolling interests (80) (80) Net income (loss) attributable to Loews Corporation $ 758 $ 191 $ 115 $ (76) $ 988

Basis of Presentation (Details)

Basis of Presentation (Details) - shares	3 Months Ended		9 Months Ended
Basis of Presentation (Details) - shares	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Share-Based Payment Arrangement
Basis of Presentation [Abstract]
Shares excluded from diluted EPS calculation (in shares)	0	0	0	0
CNA
Basis of Presentation [Abstract]
Subsidiary ownership (as a percent)	92%		92%

Investments - Net Investment In

Investments - Net Investment Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Net Investment Income [Line Items]
Investment income, operating	$ 800	$ 615	$ 2,156	$ 1,819
Investment expenses	(24)	(23)	(72)	(67)
Net investment income	776	592	2,084	1,752
Net investment income (loss) recognized due to the change in fair value of equity and trading portfolio securities held	108	(14)	123	3
Fixed maturity securities
Net Investment Income [Line Items]
Investment income, operating	517	491	1,530	1,443
Limited partnership investments
Net Investment Income [Line Items]
Gain (losses) on investments, before investment expenses	67	29	195	111
Short-term investments
Net Investment Income [Line Items]
Investment income, operating	21	24	70	54
Equity securities
Net Investment Income [Line Items]
Gain (losses) on investments, before investment expenses	21	9	56	42
Income from trading portfolio
Net Investment Income [Line Items]
Gain (losses) on investments, before investment expenses	141	32	210	91
Other
Net Investment Income [Line Items]
Investment income, operating	$ 33	$ 30	$ 95	$ 78

Investments - Investment Gains

Investments - Investment Gains (Losses) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Investment Gains (Losses) [Abstract]
Investment gains (losses) recognized due to the change in fair value of non-redeemable preferred stock included within equity securities held	$ (10)	$ (38)	$ (42)	$ (59)
Nonredeemable Preferred Stock
Investment Gains (Losses) [Abstract]
Investment gains (losses) recognized due to the change in fair value of non-redeemable preferred stock included within equity securities held	13	2	24	2
Fixed maturity securities
Investment Gains (Losses) [Abstract]
Gross gains	11	12	38	55
Gross losses	(33)	(49)	(104)	(141)
Investment gains (losses) recognized due to the change in fair value of non-redeemable preferred stock included within equity securities held	(22)	(37)	(66)	(86)
Equity securities
Investment Gains (Losses) [Abstract]
Investment gains (losses) recognized due to the change in fair value of non-redeemable preferred stock included within equity securities held	13	2	25	(9)
Short-term investments and other
Investment Gains (Losses) [Abstract]
Investment gains (losses) recognized due to the change in fair value of non-redeemable preferred stock included within equity securities held	$ (1)	$ (3)	$ (1)	(10)
Gain on acquisition of a joint venture
Investment Gains (Losses) [Abstract]
Investment gains (losses) recognized due to the change in fair value of non-redeemable preferred stock included within equity securities held				$ 46

Investments - Available-for-sal

Investments - Available-for-sale Impairment Losses Recognized in Earnings (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Fixed maturity securities available-for-sale:
Impairment losses recognized in earnings	$ 12	$ 12	$ 32	$ 37
Mortgage Receivable
Fixed maturity securities available-for-sale:
Gain (loss) on mortgage loans due to changes in expected credit losses	0	5	0	11
Corporate and other bonds
Fixed maturity securities available-for-sale:
Impairment losses recognized in earnings	8	8	23	25
Asset-backed
Fixed maturity securities available-for-sale:
Impairment losses recognized in earnings	$ 4	$ 4	$ 9	$ 12

Investments - Amortized Cost an

Investments - Amortized Cost and Fair Values of Fixed Maturity Securities (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Amortized Cost and Fair Values of Fixed Maturity Securities [Abstract]
Cost or Amortized Cost	$ 44,028	$ 42,615
Gross Unrealized Gains	1,281	1,022
Gross Unrealized Losses	2,236	2,995
Allowance for Credit Losses	18	16
Estimated Fair Value	43,055	40,626
Corporate and other bonds
Amortized Cost and Fair Values of Fixed Maturity Securities [Abstract]
Cost or Amortized Cost	25,872	25,020
Gross Unrealized Gains	826	597
Gross Unrealized Losses	900	1,345
Allowance for Credit Losses	6	4
Estimated Fair Value	25,792	24,268
States, municipalities and political subdivisions
Amortized Cost and Fair Values of Fixed Maturity Securities [Abstract]
Cost or Amortized Cost	7,406	7,713
Gross Unrealized Gains	359	382
Gross Unrealized Losses	617	703
Allowance for Credit Losses
Estimated Fair Value	7,148	7,392
Residential mortgage-backed
Amortized Cost and Fair Values of Fixed Maturity Securities [Abstract]
Cost or Amortized Cost	3,684	3,411
Gross Unrealized Gains	32	16
Gross Unrealized Losses	362	425
Allowance for Credit Losses
Estimated Fair Value	3,354	3,002
Commercial mortgage-backed
Amortized Cost and Fair Values of Fixed Maturity Securities [Abstract]
Cost or Amortized Cost	1,816	1,862
Gross Unrealized Gains	14	7
Gross Unrealized Losses	141	230
Allowance for Credit Losses		8
Estimated Fair Value	1,689	1,631
Other asset-backed
Amortized Cost and Fair Values of Fixed Maturity Securities [Abstract]
Cost or Amortized Cost	3,743	3,515
Gross Unrealized Gains	40	13
Gross Unrealized Losses	186	256
Allowance for Credit Losses	12	4
Estimated Fair Value	3,585	3,268
Asset-backed
Amortized Cost and Fair Values of Fixed Maturity Securities [Abstract]
Cost or Amortized Cost	9,243	8,788
Gross Unrealized Gains	86	36
Gross Unrealized Losses	689	911
Allowance for Credit Losses	12	12
Estimated Fair Value	8,628	7,901
U.S. Treasury and obligations of government-sponsored enterprises
Amortized Cost and Fair Values of Fixed Maturity Securities [Abstract]
Cost or Amortized Cost	224	152
Gross Unrealized Gains	2	1
Gross Unrealized Losses	4	2
Allowance for Credit Losses
Estimated Fair Value	222	151
Foreign government
Amortized Cost and Fair Values of Fixed Maturity Securities [Abstract]
Cost or Amortized Cost	755	741
Gross Unrealized Gains	8	6
Gross Unrealized Losses	26	34
Allowance for Credit Losses
Estimated Fair Value	737	713
Fixed maturities available-for-sale
Amortized Cost and Fair Values of Fixed Maturity Securities [Abstract]
Cost or Amortized Cost	43,500	42,414
Gross Unrealized Gains	1,281	1,022
Gross Unrealized Losses	2,236	2,995
Allowance for Credit Losses	18	16
Estimated Fair Value	42,527	40,425
Fixed maturities trading
Amortized Cost and Fair Values of Fixed Maturity Securities [Abstract]
Cost or Amortized Cost	528	201
Gross Unrealized Gains
Gross Unrealized Losses
Allowance for Credit Losses
Estimated Fair Value	$ 528	$ 201

Investments - Available-for-s_2

Investments - Available-for-sale Securities in Gross Unrealized Loss Position (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Estimated Fair Value
Total, Estimated Fair Value	$ 22,400	$ 25,731
Gross Unrealized Losses
Total, Gross Unrealized Losses	2,236	2,995
Fixed maturity securities
Estimated Fair Value
Less than 12 Months, Estimated Fair Value	2,623	3,483
12 Months or Longer, Estimated Fair Value	19,777	22,248
Total, Estimated Fair Value	22,400	25,731
Gross Unrealized Losses
Less than 12 Months, Gross Unrealized Losses	47	74
12 Months or Longer, Gross Unrealized Losses	2,189	2,921
Total, Gross Unrealized Losses	2,236	2,995
Corporate bonds and other
Estimated Fair Value
Less than 12 Months, Estimated Fair Value	1,664	1,943
12 Months or Longer, Estimated Fair Value	11,240	13,406
Total, Estimated Fair Value	12,904	15,349
Gross Unrealized Losses
Less than 12 Months, Gross Unrealized Losses	31	37
12 Months or Longer, Gross Unrealized Losses	869	1,308
Total, Gross Unrealized Losses	900	1,345
States, municipalities and political subdivisions
Estimated Fair Value
Less than 12 Months, Estimated Fair Value	422	598
12 Months or Longer, Estimated Fair Value	3,155	3,104
Total, Estimated Fair Value	3,577	3,702
Gross Unrealized Losses
Less than 12 Months, Gross Unrealized Losses	7	18
12 Months or Longer, Gross Unrealized Losses	610	685
Total, Gross Unrealized Losses	617	703
Residential mortgage-backed
Estimated Fair Value
Less than 12 Months, Estimated Fair Value	130	233
12 Months or Longer, Estimated Fair Value	2,162	2,212
Total, Estimated Fair Value	2,292	2,445
Gross Unrealized Losses
Less than 12 Months, Gross Unrealized Losses	2	4
12 Months or Longer, Gross Unrealized Losses	360	421
Total, Gross Unrealized Losses	362	425
Commercial mortgage-backed
Estimated Fair Value
Less than 12 Months, Estimated Fair Value	112	200
12 Months or Longer, Estimated Fair Value	1,134	1,184
Total, Estimated Fair Value	1,246	1,384
Gross Unrealized Losses
Less than 12 Months, Gross Unrealized Losses		5
12 Months or Longer, Gross Unrealized Losses	141	225
Total, Gross Unrealized Losses	141	230
Other asset-backed
Estimated Fair Value
Less than 12 Months, Estimated Fair Value	151	392
12 Months or Longer, Estimated Fair Value	1,638	1,869
Total, Estimated Fair Value	1,789	2,261
Gross Unrealized Losses
Less than 12 Months, Gross Unrealized Losses	4	8
12 Months or Longer, Gross Unrealized Losses	182	248
Total, Gross Unrealized Losses	186	256
Total asset-backed
Estimated Fair Value
Less than 12 Months, Estimated Fair Value	393	825
12 Months or Longer, Estimated Fair Value	4,934	5,265
Total, Estimated Fair Value	5,327	6,090
Gross Unrealized Losses
Less than 12 Months, Gross Unrealized Losses	6	17
12 Months or Longer, Gross Unrealized Losses	683	894
Total, Gross Unrealized Losses	689	911
U.S. Treasury and obligations of government-sponsored enterprises
Estimated Fair Value
Less than 12 Months, Estimated Fair Value	45	65
12 Months or Longer, Estimated Fair Value	45	23
Total, Estimated Fair Value	90	88
Gross Unrealized Losses
Less than 12 Months, Gross Unrealized Losses	2	1
12 Months or Longer, Gross Unrealized Losses	2	1
Total, Gross Unrealized Losses	4	2
Foreign government
Estimated Fair Value
Less than 12 Months, Estimated Fair Value	99	52
12 Months or Longer, Estimated Fair Value	403	450
Total, Estimated Fair Value	502	502
Gross Unrealized Losses
Less than 12 Months, Gross Unrealized Losses	1	1
12 Months or Longer, Gross Unrealized Losses	25	33
Total, Gross Unrealized Losses	$ 26	$ 34

Investments - Unrealized Loss (

Investments - Unrealized Loss (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	$ 22,400	$ 25,731
Gross Unrealized Losses	2,236	2,995
Additional impairment losses	0
AAA
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	1,277	1,524
Gross Unrealized Losses	221	261
AA
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	3,641	3,817
Gross Unrealized Losses	547	658
A
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	5,229	5,652
Gross Unrealized Losses	405	517
BBB
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	9,243	11,523
Gross Unrealized Losses	689	1,095
U.S. Government, Government agencies and Government-sponsored enterprises
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	2,127	2,273
Gross Unrealized Losses	265	309
Non-investment grade
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	883	942
Gross Unrealized Losses	$ 109	$ 155

Investments - Allowance for Cre

Investments - Allowance for Credit Losses (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Accrued interest receivables on available-for-sale fixed maturity securities	$ 451	$ 430	$ 451	$ 430	$ 435
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	17	22	16	1
Securities for which credit losses were not previously recorded	4	5	4	13
Available-for-sale securities accounted for as PCD assets	2	2	2	22
Securities sold during the period (realized)			4	6
Intent to sell or more likely than not will be required to sell the security before recovery of its amortized cost basis			1	3
Write-offs charged against the allowance	9	15	9	15
Additional increases to the allowance for credit losses on securities that had an allowance recorded in a previous period	4	4	10	6
Ending balance	18	18	18	18
Corporate bonds and other
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	0	13	4	0
Securities for which credit losses were not previously recorded	4	5	4	6
Available-for-sale securities accounted for as PCD assets	2	2	2	22
Securities sold during the period (realized)			3	6
Intent to sell or more likely than not will be required to sell the security before recovery of its amortized cost basis			1	3
Write-offs charged against the allowance		15		15
Additional increases to the allowance for credit losses on securities that had an allowance recorded in a previous period				1
Ending balance	6	5	6	5
Asset-backed
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	17	9	12	1
Securities for which credit losses were not previously recorded				7
Available-for-sale securities accounted for as PCD assets
Securities sold during the period (realized)			1
Intent to sell or more likely than not will be required to sell the security before recovery of its amortized cost basis
Write-offs charged against the allowance	9		9
Additional increases to the allowance for credit losses on securities that had an allowance recorded in a previous period	4	4	10	5
Ending balance	$ 12	$ 13	$ 12	$ 13

Investments - Available-for-s_3

Investments - Available-for-sale Fixed Maturity Securities by Contractual Maturity (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Cost or Amortized Cost
Cost or Amortized Cost	$ 44,028	$ 42,615
Estimated Fair Value
Estimated Fair Value	43,055	40,626
Available-for-sale Fixed Maturities
Cost or Amortized Cost
Due in one year or less	1,585	1,121
Due after one year through five years	11,948	11,563
Due after five years through ten years	13,282	13,359
Due after ten years	16,685	16,371
Cost or Amortized Cost	43,500	42,414
Estimated Fair Value
Due in one year or less	1,565	1,091
Due after one year through five years	11,800	11,180
Due after five years through ten years	12,907	12,573
Due after ten years	16,255	15,581
Estimated Fair Value	$ 42,527	$ 40,425

Investments - Amortized Cost Ba

Investments - Amortized Cost Basis of Mortgage Loans for Each Credit Quality Indicator by Year of Origination (Details) - Commercial mortgage-backed $ in Millions	Sep. 30, 2024 USD ($)
Credit Quality Information [Abstract]
2024	$ 43
2023	126
2022	247
2021	76
2020	134
Prior	412
Total	1,038
DSCR Greater than or Equal to 1.6x, LTV Less than 55%
Credit Quality Information [Abstract]
2024
2023	33
2022	9
2021	2
2020	97
Prior	242
Total	383
DSCR Greater than or Equal to 1.6x, LTV 55% to 65%
Credit Quality Information [Abstract]
2024
2023
2022
2021	5
2020
Prior
Total	5
DSCR Greater than or Equal to 1.6x, LTV Greater than 65%
Credit Quality Information [Abstract]
2024
2023
2022	30
2021	12
2020
Prior
Total	42
DSCR Between 1.2 to 1.6x, LTV Less than 55%
Credit Quality Information [Abstract]
2024
2023	28
2022	5
2021
2020	13
Prior	50
Total	96
DSCR Between 1.2 to 1.6x, LTV 55% to 65%
Credit Quality Information [Abstract]
2024	43
2023	20
2022	36
2021	36
2020	4
Prior	31
Total	170
DSCR Between 1.2 to 1.6x, LTV Greater than 65%
Credit Quality Information [Abstract]
2024
2023	13
2022	64
2021
2020	20
Prior
Total	97
DSCR Less than or Equal to 1.2x, LTV Less than 55%
Credit Quality Information [Abstract]
2024
2023
2022
2021
2020
Prior
Total	0
DSCR Less than or Equal to 1.2x, LTV 55 to 65%
Credit Quality Information [Abstract]
2024
2023	32
2022	75
2021
2020
Prior	41
Total	148
DSCR Less than or Equal to 1.2x, LTV Greater than 65%
Credit Quality Information [Abstract]
2024
2023
2022	28
2021	21
2020
Prior	48
Total	$ 97

Investments - Aggregate Contrac

Investments - Aggregate Contractual or Notional Amounts and Estimated Fair Values Related to Derivative Financial Instruments (Details) - Without Hedge Designation - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Options – purchased \| Options – purchased
Gross Estimated Fair Values of Derivative Positions [Abstract]
Contractual/Notional Amount	$ 338	$ 202
Estimated Fair Value, Asset	1	1
Estimated Fair Value, Liability
Futures – short \| Futures – short
Gross Estimated Fair Values of Derivative Positions [Abstract]
Contractual/Notional Amount	158	116
Estimated Fair Value, Asset
Estimated Fair Value, Liability	(1)
Warrants
Gross Estimated Fair Values of Derivative Positions [Abstract]
Contractual/Notional Amount	1	84
Estimated Fair Value, Asset	1	3
Estimated Fair Value, Liability
Interest rate swaps
Gross Estimated Fair Values of Derivative Positions [Abstract]
Contractual/Notional Amount	300	300
Estimated Fair Value, Asset	6	13
Estimated Fair Value, Liability
Currency forwards
Gross Estimated Fair Values of Derivative Positions [Abstract]
Contractual/Notional Amount		13
Estimated Fair Value, Asset
Estimated Fair Value, Liability		$ (1)

Investments - Investment Commit

Investments - Investment Commitments (Details) - Investments in Assets Requiring Future Purchase, Sale or Funding Commitments $ in Millions	Sep. 30, 2024 USD ($)
Other Commitments [Line Items]
Commitments to purchase or fund investments	$ 1,600
Commitments to sell investments	$ 90

Fair Value - Assets and Liabili

Fair Value - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Assets and Liabilities Measured at Fair Value [Abstract]
Fixed maturities available-for-sale	$ 43,055	$ 40,626
Corporate bonds and other
Assets and Liabilities Measured at Fair Value [Abstract]
Fixed maturities available-for-sale	25,792	24,268
States, municipalities and political subdivisions
Assets and Liabilities Measured at Fair Value [Abstract]
Fixed maturities available-for-sale	7,148	7,392
Asset-backed
Assets and Liabilities Measured at Fair Value [Abstract]
Fixed maturities available-for-sale	8,628	7,901
Fair Value, Recurring
Assets and Liabilities Measured at Fair Value [Abstract]
Fixed maturities available-for-sale	42,527	40,425
Fixed maturities trading	528	201
Total fixed maturities	43,055	40,626
Equity securities	1,215	1,050
Short-term and other	5,073	4,247
Receivables	6	13
Payable to brokers	(57)	(62)
Fair Value, Recurring \| Corporate bonds and other
Assets and Liabilities Measured at Fair Value [Abstract]
Fixed maturities available-for-sale	26,751	25,132
Fair Value, Recurring \| States, municipalities and political subdivisions
Assets and Liabilities Measured at Fair Value [Abstract]
Fixed maturities available-for-sale	7,148	7,392
Fair Value, Recurring \| Asset-backed
Assets and Liabilities Measured at Fair Value [Abstract]
Fixed maturities available-for-sale	8,628	7,901
Level 1 \| Fair Value, Recurring
Assets and Liabilities Measured at Fair Value [Abstract]
Fixed maturities available-for-sale	225	161
Fixed maturities trading	528	201
Total fixed maturities	753	362
Equity securities	765	586
Short-term and other	5,043	4,215
Receivables
Payable to brokers	(57)	(62)
Level 1 \| Fair Value, Recurring \| Corporate bonds and other
Assets and Liabilities Measured at Fair Value [Abstract]
Fixed maturities available-for-sale	225	161
Level 1 \| Fair Value, Recurring \| States, municipalities and political subdivisions
Assets and Liabilities Measured at Fair Value [Abstract]
Fixed maturities available-for-sale
Level 1 \| Fair Value, Recurring \| Asset-backed
Assets and Liabilities Measured at Fair Value [Abstract]
Fixed maturities available-for-sale
Level 2 \| Fair Value, Recurring
Assets and Liabilities Measured at Fair Value [Abstract]
Fixed maturities available-for-sale	40,105	38,274
Fixed maturities trading
Total fixed maturities	40,105	38,274
Equity securities	436	440
Short-term and other	30	32
Receivables	6	13
Payable to brokers
Level 2 \| Fair Value, Recurring \| Corporate bonds and other
Assets and Liabilities Measured at Fair Value [Abstract]
Fixed maturities available-for-sale	25,289	23,926
Level 2 \| Fair Value, Recurring \| States, municipalities and political subdivisions
Assets and Liabilities Measured at Fair Value [Abstract]
Fixed maturities available-for-sale	7,103	7,348
Level 2 \| Fair Value, Recurring \| Asset-backed
Assets and Liabilities Measured at Fair Value [Abstract]
Fixed maturities available-for-sale	7,713	7,000
Level 3 \| Fair Value, Recurring
Assets and Liabilities Measured at Fair Value [Abstract]
Fixed maturities available-for-sale	2,197	1,990
Fixed maturities trading
Total fixed maturities	2,197	1,990
Equity securities	14	24
Short-term and other
Receivables
Payable to brokers
Level 3 \| Fair Value, Recurring \| Corporate bonds and other
Assets and Liabilities Measured at Fair Value [Abstract]
Fixed maturities available-for-sale	1,237	1,045
Level 3 \| Fair Value, Recurring \| States, municipalities and political subdivisions
Assets and Liabilities Measured at Fair Value [Abstract]
Fixed maturities available-for-sale	45	44
Level 3 \| Fair Value, Recurring \| Asset-backed
Assets and Liabilities Measured at Fair Value [Abstract]
Fixed maturities available-for-sale	$ 915	$ 901

Fair Value - Reconciliations of

Fair Value - Reconciliations of Assets and Liabilities Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Corporate bonds and other
Reconciliations for All Assets and Liabilities [Roll Forward]
Balance at beginning of period	$ 1,129	$ 971	$ 1,045	$ 810
Included in Net Income
Included in OCI	59	(36)	39	(27)
Purchases	83	29	229	178
Sales	(10)		(10)
Settlements	(24)	(19)	(77)	(27)
Transfers into Level 3			11	11
Transfers out of Level 3
Balance at ending of period	1,237	945	1,237	945
Unrealized Gains (Losses) Recognized in Net Income (Loss) on Level 3 Assets and Liabilities Held
Unrealized Gains (Losses) Recognized in Other Comprehensive Income (Loss) on Level 3 Assets and Liabilities Held	57	(36)	34	(27)
States, municipalities and political subdivisions
Reconciliations for All Assets and Liabilities [Roll Forward]
Balance at beginning of period	43	43	44	43
Included in Net Income
Included in OCI	2	(2)	1	(2)
Purchases
Sales
Settlements
Transfers into Level 3
Transfers out of Level 3
Balance at ending of period	45	41	45	41
Unrealized Gains (Losses) Recognized in Net Income (Loss) on Level 3 Assets and Liabilities Held
Unrealized Gains (Losses) Recognized in Other Comprehensive Income (Loss) on Level 3 Assets and Liabilities Held	2	(2)	1	(2)
Asset-backed
Reconciliations for All Assets and Liabilities [Roll Forward]
Balance at beginning of period	887	883	901	788
Included in Net Income	1	1	5	10
Included in OCI	30	(28)	14	(28)
Purchases	38	61	111	203
Sales			(14)
Settlements	(23)	(13)	(65)	(39)
Transfers into Level 3				23
Transfers out of Level 3	(18)	(7)	(37)	(60)
Balance at ending of period	915	897	915	897
Unrealized Gains (Losses) Recognized in Net Income (Loss) on Level 3 Assets and Liabilities Held
Unrealized Gains (Losses) Recognized in Other Comprehensive Income (Loss) on Level 3 Assets and Liabilities Held	30	(28)	14	(28)
Fixed maturities available-for-sale
Reconciliations for All Assets and Liabilities [Roll Forward]
Balance at beginning of period	2,059	1,897	1,990	1,641
Included in Net Income	1	1	5	10
Included in OCI	91	(66)	54	(57)
Purchases	121	90	340	381
Sales	(10)	0	(24)	0
Settlements	(47)	(32)	(142)	(66)
Transfers into Level 3	0	0	11	34
Transfers out of Level 3	(18)	(7)	(37)	(60)
Balance at ending of period	2,197	1,883	2,197	1,883
Unrealized Gains (Losses) Recognized in Net Income (Loss) on Level 3 Assets and Liabilities Held	0	0	0	0
Unrealized Gains (Losses) Recognized in Other Comprehensive Income (Loss) on Level 3 Assets and Liabilities Held	89	(66)	49	(57)
Equity securities
Reconciliations for All Assets and Liabilities [Roll Forward]
Balance at beginning of period	14	26	24	35
Included in Net Income		(1)	6	(8)
Included in OCI
Purchases			3
Sales		(2)	(19)	(4)
Settlements
Transfers into Level 3
Transfers out of Level 3
Balance at ending of period	14	23	14	23
Unrealized Gains (Losses) Recognized in Net Income (Loss) on Level 3 Assets and Liabilities Held		(1)	2	(8)
Unrealized Gains (Losses) Recognized in Other Comprehensive Income (Loss) on Level 3 Assets and Liabilities Held

Fair Value - Significant Unobse

Fair Value - Significant Unobservable Inputs (Details) $ in Millions	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Quantitative Information About the Significant Unobservable Inputs [Abstract]
Estimated Fair Value	$ 43,055	$ 40,626
Level 3 \| Fixed maturity securities
Quantitative Information About the Significant Unobservable Inputs [Abstract]
Estimated Fair Value	$ 1,713	$ 1,495
Debt Securities, Available-for-sale, Valuation Technique [Extensible List]	Discounted cash flow	Discounted cash flow
Debt Securities, Available-for-sale, Measurement Input [Extensible List]	Credit spread	Credit spread
Level 3 \| Fixed maturity securities \| Credit spread \| Discounted cash flow \| Minimum
Quantitative Information About the Significant Unobservable Inputs [Abstract]
Measurement input (as a percent)	0.01	0.01
Level 3 \| Fixed maturity securities \| Credit spread \| Discounted cash flow \| Maximum
Quantitative Information About the Significant Unobservable Inputs [Abstract]
Measurement input (as a percent)	0.06	0.07
Level 3 \| Fixed maturity securities \| Credit spread \| Discounted cash flow \| Weighted Average
Quantitative Information About the Significant Unobservable Inputs [Abstract]
Measurement input (as a percent)	(0.02)	(0.02)

Fair Value - Financial Assets a

Fair Value - Financial Assets and Liabilities not Measured at Fair Value (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Carrying Amount
Assets:
Other invested assets, primarily mortgage loans	$ 1,003	$ 1,035
Liabilities:
Short-term debt	712	1,083
Long-term debt	8,818	7,915
Estimated Fair Value
Assets:
Other invested assets, primarily mortgage loans	988	997
Liabilities:
Short-term debt	707	1,066
Long-term debt	8,732	7,640
Estimated Fair Value \| Level 1
Assets:
Other invested assets, primarily mortgage loans
Liabilities:
Short-term debt
Long-term debt
Estimated Fair Value \| Level 2
Assets:
Other invested assets, primarily mortgage loans
Liabilities:
Short-term debt	599	546
Long-term debt	7,892	7,255
Estimated Fair Value \| Level 3
Assets:
Other invested assets, primarily mortgage loans	988	997
Liabilities:
Short-term debt	108	520
Long-term debt	$ 840	$ 385

Claim and Claim Adjustment Ex_3

Claim and Claim Adjustment Expense Reserves - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Loss from catastrophes, net of reinsurance	$ 143	$ 94	$ 313	$ 214
Pretax (favorable) unfavorable development	17	13	33	44
Hurricane
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Loss from catastrophes	55		55
Commercial auto \| CNA Financial
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Pretax (favorable) unfavorable development	(5)	(7)	(24)	(11)
Other insurance operations
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Pretax (favorable) unfavorable development	$ 22	$ 20	$ 57	$ 55

Claim and Claim Adjustment Ex_4

Claim and Claim Adjustment Expense Reserves - Reconciliation of Claim and Claim Adjustment Expense Reserves (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Gross reserves, beginning of year	$ 23,304	$ 22,120
Ceded reserves, beginning of year	5,141	5,191
Net reserves, beginning of year	18,163	16,929
Net incurred claim and claim adjustment expenses:
Provision for insured events of current year	4,706	4,221
Increase (decrease) in provision for insured events of prior years	26	43
Amortization of discount	30	33
Total net incurred	4,762	4,297
Net payments attributable to:
Current year events	(655)	(588)
Prior year events	(3,189)	(2,953)
Total net payments	(3,844)	(3,541)
Foreign currency translation adjustment and other	35	(30)
Net reserves, end of period	19,116	17,655
Ceded reserves, end of period	5,442	5,181
Gross reserves, end of period	$ 24,558	$ 22,836

Claim and Claim Adjustment Ex_5

Claim and Claim Adjustment Expense Reserves - Net Prior Year Loss Reserve Development in Property and Casualty Operations (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Net Prior Year Development [Abstract]
Total pretax (favorable) unfavorable development	$ 17	$ 13	$ 33	$ 44
Medical professional liability
Net Prior Year Development [Abstract]
Total pretax (favorable) unfavorable development			(2)	9
Other professional liability and management liability
Net Prior Year Development [Abstract]
Total pretax (favorable) unfavorable development	11	17	28	16
Surety
Net Prior Year Development [Abstract]
Total pretax (favorable) unfavorable development	(20)	(21)	(46)	(28)
Warranty
Net Prior Year Development [Abstract]
Total pretax (favorable) unfavorable development	7	(2)	20	(11)
Commercial auto
Net Prior Year Development [Abstract]
Total pretax (favorable) unfavorable development	25		46	11
General liability
Net Prior Year Development [Abstract]
Total pretax (favorable) unfavorable development	28		47	70
Workers’ compensation
Net Prior Year Development [Abstract]
Total pretax (favorable) unfavorable development	(57)	(2)	(106)	(100)
Other property and casualty operations
Net Prior Year Development [Abstract]
Total pretax (favorable) unfavorable development	1	1	(11)	22
Other insurance operations
Net Prior Year Development [Abstract]
Total pretax (favorable) unfavorable development	$ 22	$ 20	$ 57	$ 55

Claim and Claim Adjustment Ex_6

Claim and Claim Adjustment Expense Reserves - A&EP Reserves (Details) - A&EP Reserves - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2010	Dec. 31, 2023
A&EP Reserves [Abstract]
Net A&EP claim and allocated claim adjustment expense reserves					$ 1,600
Aggregate limit under A&EP loss portfolio transfer					4,000
Ceded A&EP claim and allocated claim adjustment expense reserves under existing third party reinsurance contracts transferred to NICO under A&EP loss portfolio transfer					1,200
Reinsurance premium paid to NICO under A&EP loss portfolio transfer					2,000
Net reinsurance receivables transferred to NICO under A&EP loss portfolio transfer					215
Total consideration					$ 2,200
Retroactive reinsurance benefit recognized	$ 11	$ 15	$ 36	$ 38
Cumulative amounts ceded under loss portfolio transfer	3,600		3,600			$ 3,600
Unrecognized deferred retroactive reinsurance benefit	382		382			$ 417
Fair value of collateral trust account	$ 2,300		$ 2,300

Future Policy Benefits Reserv_3

Future Policy Benefits Reserves - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Insurance [Abstract]
Pretax change in LFPB	$ 15	$ 8
Liability for future policy benefit, expected future gross premium, discounted, before reinsurance	$ 3,800	$ 3,700	$ 3,800	$ 3,700
Liability for future policy benefit, weighted-average duration (in years)	11 years	12 years	11 years	12 years
Liability for future policy benefit, adverse development, expense	$ 84	$ 109	$ 128	$ 152
Liability future policy benefit, losses recognized in prior period	$ 20	$ 26	$ 28	$ 37

Future Policy Benefits Reserv_4

Future Policy Benefits Reserves - Balances and Changes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Present value of future net premiums
Balance, January 1					$ 3,710	$ 3,993
Effect of changes in discount rate	$ 147	$ (67)	$ 147	$ (67)	(125)	(74)
Balance, January 1, at original locked in discount rate					3,585	3,919
Effect of changes in cash flow assumptions					111	28
Expect of actual variances from expected experience					(40)	(112)
Adjusted balance, January 1	3,478	3,656	3,478	3,656	3,656	3,835
Interest accrual			139	153
Net premiums: earned during period			(317)	(332)
Balance, end of period at original locked in discount rate	3,478	3,656	3,478	3,656
Effect of changes in discount rate	147	(67)	147	(67)	(125)	(74)
Balance, September 30	3,625	3,589	3,625	3,589
Present value of future benefits & expenses
Balance, January 1					17,669	17,472
Effect of changes in discount rate	612	(873)	612	(873)	(578)	(125)
Balance, January 1, at original locked in discount rate			17,091	17,347
Effect of changes in cash flow assumptions					126	36
Effect of actual variances from expected experience					33	(45)
Adjusted balance, January 1					17,250	17,338
Interest accrual			693	723
Benefit & expense payments			(883)	(945)
Balance, end of period at original locked in discount rate	17,060	17,116	17,060	17,116
Effect of changes in discount rate	612	(873)	612	(873)	(578)	$ (125)
Balance, September 30	17,672	16,243	17,672	16,243
Net LFPB	14,047	12,654	14,047	12,654	$ 13,959
Re-measurement gain (loss) of insurance claims and policyholders’ benefits	$ (48)	$ (41)	$ (88)	$ (75)

Future Policy Benefits Reserv_5

Future Policy Benefits Reserves - Earned Premiums and Interest Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Insurance [Abstract]
Earned premiums	$ 110	$ 112	$ 329	$ 340
Interest expense	$ 185	$ 191	$ 554	$ 570

Future Policy Benefits Reserv_6

Future Policy Benefits Reserves - Undiscounted Expected Future Benefit and Expense Payments and Undiscounted Expected Future Gross Premiums (Details) - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023
Insurance [Abstract]
Expected future benefit and expense payments	$ 32,009	$ 33,217
Expected future gross premiums	$ 5,305	$ 5,557

Future Policy Benefits Reserv_7

Future Policy Benefits Reserves - Weighted Average Interest Rates (Details)	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Insurance [Abstract]
Original locked in discount rate	5.20%	5.22%	5.24%
Upper-medium grade fixed income instrument discount rate	4.90%	4.94%	5.78%

Shareholders' Equity - Componen

Shareholders' Equity - Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2022
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	$ 17,201	$ 15,470	$ 16,525	$ 15,201
Other comprehensive income (loss) before reclassifications, after tax	679	(352)	757	(226)
Reclassification of losses from accumulated other comprehensive loss, after tax	25	69	72	123
Other comprehensive income (loss)	704	(283)	829	(103)
Amounts attributable to noncontrolling interests	(59)	31	(70)	11
Purchase of CNA shares/ Other		(61)	0	(61)
Balance at end of period	18,248	15,158	18,248	15,158
Cumulative Effect, Period of Adoption, Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period				(277)
As Reported
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period				15,478
Net Unrealized Gains (Losses) on Investments with an Allowance for Credit Losses
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(10)	(16)	(12)	(7)
Other comprehensive income (loss) before reclassifications, after tax	(9)	(9)	(14)	(25)
Reclassification of losses from accumulated other comprehensive loss, after tax	6	8	13	15
Other comprehensive income (loss)	(3)	(1)	(1)	(10)
Amounts attributable to noncontrolling interests		1		1
Purchase of CNA shares/ Other
Balance at end of period	(13)	(16)	(13)	(16)
Other comprehensive income (loss) before reclassifications, tax	3	3	4	7
Reclassification of losses from accumulated other comprehensive loss, tax	(2)	(2)	(4)	(4)
Net Unrealized Gains (Losses) on Investments with an Allowance for Credit Losses \| Cumulative Effect, Period of Adoption, Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period
Cumulative effect adjustments from changes in accounting standards, tax					$ 0
Net Unrealized Gains (Losses) on Investments with an Allowance for Credit Losses \| As Reported
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period				(7)
Net Unrealized Gains (Losses) on Other Investments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(1,903)	(2,238)	(1,483)	(2,469)
Other comprehensive income (loss) before reclassifications, after tax	1,253	(1,105)	764	(880)
Reclassification of losses from accumulated other comprehensive loss, after tax	11	21	39	53
Other comprehensive income (loss)	1,264	(1,084)	803	(827)
Amounts attributable to noncontrolling interests	(105)	95	(67)	69
Purchase of CNA shares/ Other		(46)	3	(46)
Balance at end of period	(744)	(3,273)	(744)	(3,273)
Other comprehensive income (loss) before reclassifications, tax	(337)	295	(206)	235
Reclassification of losses from accumulated other comprehensive loss, tax	(3)	(6)	(10)	(14)
Net Unrealized Gains (Losses) on Other Investments \| Cumulative Effect, Period of Adoption, Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period
Cumulative effect adjustments from changes in accounting standards, tax					0
Net Unrealized Gains (Losses) on Other Investments \| As Reported
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period				(2,469)
Cumulative impact of changes in discount rates used to measure long duration contracts
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	234	(163)	(329)	(36)
Other comprehensive income (loss) before reclassifications, after tax	(623)	818	(9)	678
Reclassification of losses from accumulated other comprehensive loss, after tax
Other comprehensive income (loss)	(623)	818	(9)	678
Amounts attributable to noncontrolling interests	52	(69)	1	(56)
Purchase of CNA shares/ Other		(1)		(1)
Balance at end of period	(337)	585	(337)	585
Other comprehensive income (loss) before reclassifications, tax	165	(217)	2	(180)
Reclassification of losses from accumulated other comprehensive loss, tax	0	0	0	0
Cumulative impact of changes in discount rates used to measure long duration contracts \| Cumulative Effect, Period of Adoption, Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period				(36)
Cumulative effect adjustments from changes in accounting standards, tax					11
Cumulative impact of changes in discount rates used to measure long duration contracts \| As Reported
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period				0
Unrealized Gains (Losses) on Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	10	20	9	14
Other comprehensive income (loss) before reclassifications, after tax	(7)	(1)	(6)	5
Reclassification of losses from accumulated other comprehensive loss, after tax
Other comprehensive income (loss)	(7)	(1)	(6)	5
Amounts attributable to noncontrolling interests
Purchase of CNA shares/ Other
Balance at end of period	3	19	3	19
Other comprehensive income (loss) before reclassifications, tax	3	(2)	3	(1)
Reclassification of losses from accumulated other comprehensive loss, tax	0	0	0	0
Unrealized Gains (Losses) on Cash Flow Hedges \| Cumulative Effect, Period of Adoption, Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period
Cumulative effect adjustments from changes in accounting standards, tax					0
Unrealized Gains (Losses) on Cash Flow Hedges \| As Reported
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period				14
Pension and Postretirement Benefits
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(525)	(609)	(533)	(622)
Other comprehensive income (loss) before reclassifications, after tax	1		1
Reclassification of losses from accumulated other comprehensive loss, after tax	8	40	20	55
Other comprehensive income (loss)	9	40	21	55
Amounts attributable to noncontrolling interests	(1)	(1)	(2)	(3)
Purchase of CNA shares/ Other		(10)	(3)	(10)
Balance at end of period	(517)	(580)	(517)	(580)
Other comprehensive income (loss) before reclassifications, tax	0	0	0	0
Reclassification of losses from accumulated other comprehensive loss, tax	(3)	(11)	(5)	(15)
Pension and Postretirement Benefits \| Cumulative Effect, Period of Adoption, Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period
Cumulative effect adjustments from changes in accounting standards, tax					0
Pension and Postretirement Benefits \| As Reported
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period				(622)
Foreign Currency Translation
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(189)	(154)	(149)	(200)
Other comprehensive income (loss) before reclassifications, after tax	64	(55)	21	(4)
Reclassification of losses from accumulated other comprehensive loss, after tax
Other comprehensive income (loss)	64	(55)	21	(4)
Amounts attributable to noncontrolling interests	(5)	5	(2)
Purchase of CNA shares/ Other		(4)		(4)
Balance at end of period	(130)	(208)	(130)	(208)
Other comprehensive income (loss) before reclassifications, tax	0	0	0	0
Reclassification of losses from accumulated other comprehensive loss, tax	0	0	0	0
Foreign Currency Translation \| Cumulative Effect, Period of Adoption, Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period
Cumulative effect adjustments from changes in accounting standards, tax					$ 0
Foreign Currency Translation \| As Reported
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period				(200)
Total Accumulated Other Comprehensive Income (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(2,383)	(3,160)	(2,497)	(3,320)
Balance at end of period	$ (1,738)	$ (3,473)	$ (1,738)	(3,473)
Total Accumulated Other Comprehensive Income (Loss) \| Cumulative Effect, Period of Adoption, Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period				(36)
Total Accumulated Other Comprehensive Income (Loss) \| As Reported
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period				$ (3,284)

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Equity [Abstract]
Purchases of treasury stock (in shares)			3.5	11.9
Purchases of treasury stock	$ 65	$ 118	$ 264	$ 711

Debt (Details)

Debt (Details) - Senior Notes - USD ($) $ in Millions	May 31, 2024	Feb. 29, 2024
CNA Financial \| 5.1% Senior Notes Due February 15, 2034
Debt [Abstract]
Face amount		$ 500
Interest rate (as a percent)		5.10%
CNA Financial \| 4.0% Senior Notes Due May, 2024
Debt [Abstract]
Interest rate (as a percent)	4%
Long term debt	$ 550
Boardwalk Pipelines \| 5.6% Senior Notes Due August 1, 2034
Debt [Abstract]
Face amount		$ 600
Interest rate (as a percent)		5.60%
Boardwalk Pipelines \| 5.0% Notes Due December 2024
Debt [Abstract]
Interest rate (as a percent)		5%
Long term debt		$ 600

Revenue from Contracts with C_3

Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenues [Abstract]
Total revenues from contracts with customers	$ 683	$ 537	$ 2,104	$ 1,660
Other revenues	23	22	74	68
Operating revenues and other	706	559	2,178	1,728
CNA Financial \| Non-insurance warranty
Disaggregation of Revenues [Abstract]
Total revenues from contracts with customers	401	407	1,212	1,221
Boardwalk Pipelines \| Transportation and storage of natural gas and NGLs and other services
Disaggregation of Revenues [Abstract]
Total revenues from contracts with customers	463	347	1,431	1,083
Loews Hotels & Co \| Lodging and related services
Disaggregation of Revenues [Abstract]
Total revenues from contracts with customers	$ 220	$ 190	$ 673	$ 577

Revenue from Contracts with C_4

Revenue from Contracts with Customers - Additional Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Revenue recognized	$ 1,100	$ 905
Receivables
Disaggregation of Revenue [Line Items]
Receivables from contracts with customers	200		$ 228
Other Liabilities
Disaggregation of Revenue [Line Items]
Deferred revenue	$ 4,700		$ 4,800

Revenue from Contracts with C_5

Revenue from Contracts with Customers - Performance Obligations (Details) $ in Billions	Sep. 30, 2024 USD ($)
Disaggregation of Revenue [Line Items]
Remaining performance obligations	$ 15.5
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-10-01
Disaggregation of Revenue [Line Items]
Remaining performance obligations	$ 0.8
Expected timing of satisfaction	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Disaggregation of Revenue [Line Items]
Remaining performance obligations	$ 2.8
Expected timing of satisfaction	1 year

Benefit Plans - Components of N

Benefit Plans - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Settlements		$ 47
Pension Benefits
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 1	1	$ 2	$ 2
Interest cost	23	28	72	84
Expected return on plan assets	(29)	(32)	(88)	(96)
Amortization of unrecognized net loss	7	9	22	27
Settlements	4	47	4	48
Net periodic cost	6	53	12	65
Other Postretirement Benefits
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Interest cost			1	1
Expected return on plan assets	(1)	(1)	(2)	(2)
Amortization of unrecognized net loss	1	1	1	1
Net periodic cost	$ 0	$ 0	$ 0	$ 0

Benefit Plans - Additional Info

Benefit Plans - Additional Information (Details) $ in Millions	3 Months Ended
	Sep. 30, 2023 USD ($)
Retirement Benefits [Abstract]
Pre-tax pension settlement charge	$ 47
Pension settlement charge, after tax and noncontrolling interests	$ 37

Legal Proceedings (Details)

Legal Proceedings (Details) $ in Millions	Nov. 12, 2021 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Trial court, plaintiff award	$ 690
Trial court, plaintiff award, plus pre-judgement interest	$ 166

Commitments and Contingencies (

Commitments and Contingencies (Details) $ in Billions	Sep. 30, 2024 USD ($)
CNA Financial
Commitments and Contingencies [Abstract]
Potential amount of future payments under guarantees	$ 1.4

Segments (Details)

Segments (Details) $ in Millions	3 Months Ended		9 Months Ended
Segments (Details) $ in Millions	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) Segment subsidiary	Sep. 30, 2023 USD ($)
Segments [Abstract]
Number of reportable segments \| Segment			4
Number of individual operating subsidiaries \| subsidiary			3
Revenues:
Insurance premiums	$ 2,593	$ 2,406	$ 7,532	$ 7,001
Net investment income	776	592	2,084	1,752
Investment gains (losses)	(10)	(38)	(42)	(59)
Non-insurance warranty revenue	401	407	1,212	1,221
Operating revenues and other	706	559	2,178	1,728
Total	4,466	3,926	12,964	11,643
Expenses:
Insurance claims and policyholders’ benefits	2,019	1,826	5,708	5,258
Amortization of deferred acquisition costs	457	426	1,336	1,208
Non-insurance warranty expense	387	386	1,169	1,154
Operating expenses and other	930	860	2,778	2,449
Equity method (income) loss	9	(22)	(44)	(89)
Interest	114	94	331	280
Total	3,916	3,570	11,278	10,260
Income (loss) before income tax	550	356	1,686	1,383
Income tax (expense) benefit	(125)	(80)	(381)	(315)
Net income (loss)	425	276	1,305	1,068
Amounts attributable to noncontrolling interests	(24)	(23)	(78)	(80)
Net income (loss) attributable to Loews Corporation	401	253	1,227	988
Operating Segments \| CNA Financial
Revenues:
Insurance premiums	2,593	2,406	7,532	7,001
Net investment income	626	553	1,853	1,653
Investment gains (losses)	(10)	(38)	(42)	(105)
Non-insurance warranty revenue	401	407	1,212	1,221
Operating revenues and other	8	8	26	22
Total	3,618	3,336	10,581	9,792
Expenses:
Insurance claims and policyholders’ benefits	2,019	1,826	5,708	5,258
Amortization of deferred acquisition costs	457	426	1,336	1,208
Non-insurance warranty expense	387	386	1,169	1,154
Operating expenses and other	362	338	1,077	1,021
Equity method (income) loss
Interest	32	34	101	93
Total	3,257	3,010	9,391	8,734
Income (loss) before income tax	361	326	1,190	1,058
Income tax (expense) benefit	(78)	(68)	(252)	(220)
Net income (loss)	283	258	938	838
Amounts attributable to noncontrolling interests	(24)	(23)	(78)	(80)
Net income (loss) attributable to Loews Corporation	259	235	860	758
Operating Segments \| Boardwalk Pipelines
Revenues:
Insurance premiums
Net investment income	9	6	22	11
Investment gains (losses)
Non-insurance warranty revenue
Operating revenues and other	474	357	1,466	1,114
Total	483	363	1,488	1,125
Expenses:
Insurance claims and policyholders’ benefits
Amortization of deferred acquisition costs
Non-insurance warranty expense
Operating expenses and other	332	258	991	751
Equity method (income) loss
Interest	47	39	137	117
Total	379	297	1,128	868
Income (loss) before income tax	104	66	360	257
Income tax (expense) benefit	(27)	(17)	(92)	(66)
Net income (loss)	77	49	268	191
Amounts attributable to noncontrolling interests
Net income (loss) attributable to Loews Corporation	77	49	268	191
Operating Segments \| Loews Hotels & Co
Revenues:
Insurance premiums
Net investment income	2	2	7	4
Investment gains (losses)				46
Non-insurance warranty revenue
Operating revenues and other	224	194	686	592
Total	226	196	693	642
Expenses:
Insurance claims and policyholders’ benefits
Amortization of deferred acquisition costs
Non-insurance warranty expense
Operating expenses and other	218	195	652	572
Equity method (income) loss		(26)	(59)	(98)
Interest	17	3	37	9
Total	235	172	630	483
Income (loss) before income tax	(9)	24	63	159
Income tax (expense) benefit	1	(7)	(20)	(44)
Net income (loss)	(8)	17	43	115
Amounts attributable to noncontrolling interests
Net income (loss) attributable to Loews Corporation	(8)	17	43	115
Segment Reconciling Items \| Corporate
Revenues:
Insurance premiums
Net investment income	139	31	202	84
Investment gains (losses)
Non-insurance warranty revenue
Operating revenues and other
Total	139	31	202	84
Expenses:
Insurance claims and policyholders’ benefits
Amortization of deferred acquisition costs
Non-insurance warranty expense
Operating expenses and other	18	69	58	105
Equity method (income) loss	9	4	15	9
Interest	18	18	56	61
Total	45	91	129	175
Income (loss) before income tax	94	(60)	73	(91)
Income tax (expense) benefit	(21)	12	(17)	15
Net income (loss)	73	(48)	56	(76)
Amounts attributable to noncontrolling interests
Net income (loss) attributable to Loews Corporation	$ 73	$ (48)	$ 56	$ (76)

Subsequent Events (Details)

Subsequent Events (Details) $ in Millions	1 Months Ended	3 Months Ended			9 Months Ended
Subsequent Events (Details) $ in Millions	Oct. 31, 2024 USD ($) participant	Dec. 31, 2024 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)
Subsequent Event [Line Items]
Pre-tax pension settlement charge				$ 47
Pension settlement charge, after tax and noncontrolling interests				$ 37
Hurricane
Subsequent Event [Line Items]
Loss from catastrophes			$ 55		$ 55
Forecast \| Hurricane \| Minimum
Subsequent Event [Line Items]
Loss from catastrophes		$ 25
Forecast \| Hurricane \| Maximum
Subsequent Event [Line Items]
Loss from catastrophes		55
Subsequent Event \| CNA Employee Retirement Plan
Subsequent Event [Line Items]
Amount transferred to the Insurer of the defined benefit obligation	$ 1,045
Number of plan participants and beneficiaries \| participant	7,600
Defined benefit plan, plan participants and beneficiaries, percentage	60%
Subsequent Event \| Forecast
Subsequent Event [Line Items]
Pre-tax pension settlement charge		370
Pension settlement charge, after tax and noncontrolling interests		$ 265