CONSOLIDATED CONDENSED STATEMENTS OF EQUITY (Unaudited) - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Common Stock Held in Treasury [Member]	Noncontrolling Interests [Member]
Balance at Dec. 31, 2018	$ 21,386	$ 3	$ 3,627	$ 15,773	$ (880)	$ (5)	$ 2,868
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	396			394			2
Other comprehensive income (loss)	549				490		59
Dividends paid ($0.0625 per share)	(87)			(19)
Dividends paid ($0.0625 per share)							(68)
Purchases of Loews Corporation treasury stock	(322)					(322)
Purchases of subsidiary stock from non-controlling interests	(14)						(14)
Stock-based compensation	1		(19)				20
Other	(7)		(1)	(4)			(2)
Balance at Mar. 31, 2019	21,902	3	3,607	16,144	(390)	(327)	2,865
Balance at Dec. 31, 2019	21,930	3	3,374	15,823	(68)	(13)	2,811
Cumulative effect adjustment from change in accounting standards (ASU 2016-13 [Member]) at Dec. 31, 2019	(5)			(5)
Balance, as adjusted 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)	(1,044)			(632)			(412)
Other comprehensive income (loss)	(1,144)				(1,025)		(119)
Dividends paid ($0.0625 per share)	(87)			(18)
Dividends paid ($0.0625 per share)							(69)
Purchases of Loews Corporation treasury stock	(445)					(445)
Purchases of subsidiary stock from non-controlling interests	(18)						(18)
Stock-based compensation	(4)		(22)				18
Other	(5)		(5)	(1)			1
Balance at Mar. 31, 2020	$ 19,178	$ 3	$ 3,347	$ 15,167	$ (1,093)	$ (458)	$ 2,212