CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 404	$ 352
Other comprehensive income (loss), after tax
Net unrealized losses on investments with an allowance for credit losses	(8)	(4)
Net unrealized gains (losses) on other investments	670	(2,643)
Total unrealized gains (losses) on investments	662	(2,647)
Impact of changes in discount rates used to measure long-duration contract liabilities	(396)	1,635
Unrealized gains (losses) on cash flow hedges	(2)	18
Pension and postretirement benefits	9	7
Foreign currency translation	16	(15)
Other comprehensive income (loss)	289	(1,002)
Comprehensive income (loss)	693	(650)
Amounts attributable to noncontrolling interests	(60)	76
Total comprehensive income (loss) attributable to Loews Corporation	$ 633	$ (574)