CONSOLIDATED CONDENSED STATEMENTS OF EQUITY (Unaudited) - USD ($) $ in Millions	Total	As Reported	Effect of Adoption	Common Stock	Common Stock As Reported	Additional Paid-in Capital	Additional Paid-in Capital As Reported	Retained Earnings	Retained Earnings As Reported	Retained Earnings Effect of Adoption	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) As Reported	Accumulated Other Comprehensive Income (Loss) Effect of Adoption	Common Stock Held in Treasury	Common Stock Held in Treasury As Reported	Noncontrolling Interests	Noncontrolling Interests As Reported	Noncontrolling Interests Effect of Adoption
Balance at beginning of period at Dec. 31, 2021	$ 17,471	$ 19,175	$ (1,704)	$ 2	$ 2	$ 2,885	$ 2,885	$ 14,754	$ 14,776	$ (22)	$ (1,320)	$ 186	$ (1,506)	$ (3)	$ (3)	$ 1,153	$ 1,329	$ (176)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	539	572	(33)					489								50
Other comprehensive income (loss)	(1,780)	(3,010)	1,230								(1,594)					(186)
Dividends paid	(110)							(31)
Dividends paid																(79)
Purchase of subsidiary stock from noncontrolling interests	(21)					(1)										(20)
Purchases of Loews Corporation treasury stock	(384)													(384)
Stock-based compensation	2					(14)										16
Other	(3)					(1)		(2)			1			1		(2)
Balance at end of period at Jun. 30, 2022	$ 15,714			2		2,869		15,210			(2,913)			(386)		932
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends paid (in dollars per share)	$ 0.125
Balance at beginning of period at Mar. 31, 2022	$ 16,576	17,695	(1,119)	2	2	2,859	2,859	15,059	15,097	(38)	(2,216)	(1,251)	(965)	(132)	(132)	1,004	1,120	(116)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	187	202	(15)					167								20
Other comprehensive income (loss)	(778)	(1,405)	627								(699)					(79)
Dividends paid	(26)							(15)
Dividends paid																(11)
Purchases of Loews Corporation treasury stock	(255)													(255)
Stock-based compensation	12					11										1
Other	(2)					(1)		(1)			2			1		(3)
Balance at end of period at Jun. 30, 2022	$ 15,714			2		2,869		15,210			(2,913)			(386)		932
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends paid (in dollars per share)	$ 0.0625
Balance at beginning of period at Dec. 31, 2022	$ 15,201	$ 15,478	$ (277)	2	$ 2	2,748	$ 2,748	14,931	$ 15,144	$ (213)	(3,320)	$ (3,284)	$ (36)	(12)	$ (12)	852	$ 880	$ (28)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	792							735								57
Other comprehensive income (loss)	180										160					20
Dividends paid	(84)							(29)
Dividends paid																(55)
Purchase of subsidiary stock from noncontrolling interests	(26)															(26)
Purchases of Loews Corporation treasury stock	(593)													(593)
Stock-based compensation	5					(17)										22
Other	(5)					(3)								1		(3)
Balance at end of period at Jun. 30, 2023	$ 15,470			2		2,728		15,637			(3,160)			(604)		867
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends paid (in dollars per share)	$ 0.125
Balance at beginning of period at Mar. 31, 2023	$ 15,314			2		2,716		15,293			(3,062)			(498)		863
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	388							360								28
Other comprehensive income (loss)	(109)										(98)					(11)
Dividends paid	(25)							(14)
Dividends paid																(11)
Purchase of subsidiary stock from noncontrolling interests	(2)															(2)
Purchases of Loews Corporation treasury stock	(107)													(107)
Stock-based compensation	9					9
Other	2					3		(2)						1
Balance at end of period at Jun. 30, 2023	$ 15,470			$ 2		$ 2,728		$ 15,637			$ (3,160)			$ (604)		$ 867
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends paid (in dollars per share)	$ 0.0625