CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Millions	Total	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, 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, 2019		$ 21,925		$ 3		$ 3,374		$ 15,818		$ (68)		$ (13)		$ 2,811
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ (1,291)						$ (931)						$ (360)
Other comprehensive income (loss)	727								$ 649				78
Dividends paid ($0.25 per share)	(169)						(70)
Dividends paid ($0.25 per share)													(99)
Deconsolidation of Diamond Offshore	(1,087)												(1,087)
Purchase of subsidiary stock from noncontrolling interests	(37)				$ 5								(42)
Purchases of Loews Corporation treasury stock	(917)										$ (917)
Retirement of treasury stock	0				(256)		(667)				923
Stock-based compensation	26				8								18
Other	4				2								2
Balance at end of period at Dec. 31, 2020	19,181		$ 3		3,133		14,150		581		(7)		1,321
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,703						1,578						125
Other comprehensive income (loss)	(445)								(395)				(50)
Dividends paid ($0.25 per share)	(129)						(65)
Dividends paid ($0.25 per share)													(64)
Purchase of subsidiary stock from noncontrolling interests	(18)												(18)
Purchases of Loews Corporation treasury stock	(1,132)										(1,132)
Retirement of treasury stock	0		(1)		(246)		(889)				1,136
Stock-based compensation	15				(2)								17
Other	0						2						(2)
Balance at end of period at Dec. 31, 2021	19,175		2		2,885		14,776		186		(3)		1,329
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,103						1,012						91
Other comprehensive income (loss)	(3,858)								(3,470)				(388)
Dividends paid ($0.25 per share)	(159)						(61)
Dividends paid ($0.25 per share)													(98)
Purchase of subsidiary stock from noncontrolling interests	(66)				4								(70)
Purchases of Loews Corporation treasury stock	(738)										(738)
Retirement of treasury stock	0				(146)		(583)				729
Stock-based compensation	21				3								18
Other	0				2								(2)
Balance at end of period at Dec. 31, 2022	$ 15,478		$ 2		$ 2,748		$ 15,144		$ (3,284)		$ (12)		$ 880