CONSOLIDATED CONDENSED STATEMENTS OF EQUITY - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Common Stock Held in Treasury	Noncontrolling Interests
Balance at beginning 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	1,332			1,235			97
Other comprehensive loss	(438)				(390)		(48)
Dividends paid	(103)			(49)
Dividends paid							(54)
Purchase of subsidiary stock from noncontrolling interests	(18)						(18)
Purchases of Loews Corporation treasury stock	(826)					(826)
Stock-based compensation	5		(11)				16
Other	(3)		(2)				(1)
Balance at end of period at Sep. 30, 2021	19,130	3	3,120	15,336	191	(833)	1,313
Balance at beginning of period at Jun. 30, 2021	19,398	3	3,121	15,132	327	(500)	1,315
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	246			220			26
Other comprehensive loss	(153)				(136)		(17)
Dividends paid	(27)			(16)
Dividends paid							(11)
Purchases of Loews Corporation treasury stock	(333)					(333)
Stock-based compensation	(2)		(2)
Other	1		1
Balance at end of period at Sep. 30, 2021	19,130	3	3,120	15,336	191	(833)	1,313
Balance at beginning 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	715			648			67
Other comprehensive loss	(4,435)				(3,989)		(446)
Dividends paid	(133)			(46)
Dividends paid							(87)
Purchase of subsidiary stock from noncontrolling interests	(66)		4				(70)
Purchases of Loews Corporation treasury stock	(614)					(614)
Stock-based compensation	11		(6)				17
Other	0		3	(1)		1	(3)
Balance at end of period at Sep. 30, 2022	14,653	2	2,886	15,377	(3,803)	(616)	807
Balance at beginning of period at Jun. 30, 2022	16,221	2	2,869	15,261	(2,510)	(386)	985
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	143			130			13
Other comprehensive loss	(1,425)				(1,293)		(132)
Dividends paid	(23)			(15)
Dividends paid							(8)
Purchase of subsidiary stock from noncontrolling interests	(45)		5				(50)
Purchases of Loews Corporation treasury stock	(230)					(230)
Stock-based compensation	9		8				1
Other	3		4	1			(2)
Balance at end of period at Sep. 30, 2022	$ 14,653	$ 2	$ 2,886	$ 15,377	$ (3,803)	$ (616)	$ 807