CONSOLIDATED CONDENSED STATEMENTS OF EQUITY (Unaudited) - USD ($) $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock	Common Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Additional Paid-in Capital	Additional Paid-in Capital Cumulative Effect, Period of Adoption, Adjusted Balance	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock Held in Treasury	Common Stock Held in Treasury Cumulative Effect, Period of Adoption, Adjusted Balance	Noncontrolling Interests	Noncontrolling Interests Cumulative Effect, Period of Adoption, Adjusted Balance
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	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	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
Balance at beginning of period at Dec. 31, 2024	17,937	$ 5	$ 17,942	2	$ 2	2,490	$ 2,490	16,459	$ 5	$ 16,464	(1,867)	$ (1,867)	(18)	$ (18)	871	$ 871
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,344							1,265							79
Other comprehensive income	771										707				64
Dividends paid	(115)							(39)							(76)
Purchase of subsidiary stock from noncontrolling interests	(34)					(3)					(1)				(30)
Purchases of Loews Corporation treasury stock	(690)												(690)
Stock-based compensation	(3)					(22)									19
Other	8					4									4
Balance at end of period at Sep. 30, 2025	19,223			2		2,469		17,690			(1,161)		(708)		931
Balance at beginning of period at Jun. 30, 2025	18,389			2		2,467		17,198			(1,502)		(651)		875
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	536							504							32
Other comprehensive income	371										341				30
Dividends paid	(24)							(13)							(11)
Purchases of Loews Corporation treasury stock	(57)												(57)
Stock-based compensation	2					2
Other	6							1							5
Balance at end of period at Sep. 30, 2025	$ 19,223			$ 2		$ 2,469		$ 17,690			$ (1,161)		$ (708)		$ 931