CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) [Abstract]
Net income (loss)	$ (846)	$ 225	$ (1,890)	$ 621
Other comprehensive income (loss), after tax
Net unrealized gains (losses) on investments with an allowance for credit losses	2		(9)
Net unrealized gains on other investments	1,191	436	147	966
Total unrealized gains on investments	1,193	436	138	966
Unrealized losses on cash flow hedges		(6)	(19)	(12)
Pension and postretirement benefits	6	7	20	15
Foreign currency translation	29	3	(55)	20
Other comprehensive income (loss)	1,228	440	84	989
Comprehensive income (loss)	382	665	(1,806)	1,610
Amounts attributable to noncontrolling interests	(119)	(23)	412	(84)
Total comprehensive income (loss) attributable to Loews Corporation	$ 263	$ 642	$ (1,394)	$ 1,526