CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 276	$ (27)	$ 1,068	$ 512
Other comprehensive income (loss), after tax
Net unrealized losses on investments with an allowance for credit losses	(1)	(2)	(10)	(8)
Net unrealized losses on other investments	(1,084)	(1,735)	(827)	(6,604)
Total unrealized losses on investments	(1,085)	(1,737)	(837)	(6,612)
Impact of changes in discount rates used to measure long-duration contract liabilities	818	994	678	4,136
Unrealized gains (losses) on cash flow hedges	(1)	4	5	28
Pension and postretirement benefits	40	6	55	18
Foreign currency translation	(55)	(106)	(4)	(189)
Other comprehensive loss	(283)	(839)	(103)	(2,619)
Comprehensive income (loss)	(7)	(866)	965	(2,107)
Amounts attributable to noncontrolling interests	8	78	(69)	215
Total comprehensive income (loss) attributable to Loews Corporation	$ 1	$ (788)	$ 896	$ (1,892)