CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 485	$ 404
Other comprehensive income (loss), after tax
Net unrealized gains (losses) on investments with an allowance for credit losses	2	(8)
Net unrealized gains (losses) on other investments	(217)	670
Total unrealized gains (losses) on investments	(215)	662
Impact of changes in discount rates used to measure long-duration contract liabilities	341	(396)
Unrealized gains (losses) on cash flow hedges	2	(2)
Pension and postretirement benefits	6	9
Foreign currency translation	(33)	16
Other comprehensive income (loss)	101	289
Comprehensive income	586	693
Amounts attributable to noncontrolling interests	(36)	(60)
Total comprehensive income attributable to Loews Corporation	$ 550	$ 633