Schedule I - Condensed Financial Information of Registrant, Statements of Operations and Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues:
Investment loss	$ (53)	$ (199)	$ 660
Total	15,901	14,044	14,657
Expenses:
Interest	376	378	424
Total	13,905	12,930	12,497
Income tax benefit	(451)	(223)	(475)
Net income (loss)	1,545	891	1,685
Total comprehensive income (loss) attributable to Loews Corporation	2,318	(1,178)	1,758
Loews Corporation
Revenues:
Equity in income of subsidiaries	1,501	963	1,639
Net investment income, interest and other	131	1	103
Investment loss			(15)
Total	1,632	964	1,727
Expenses:
Administrative	119	84	93
Interest	80	89	89
Total	199	173	182
Income (loss) before income tax	1,433	791	1,545
Income tax benefit	1	31	17
Net income (loss)	1,434	822	1,562
Equity in other comprehensive income (loss) of subsidiaries	884	(2,000)	196
Total comprehensive income (loss) attributable to Loews Corporation	$ 2,318	$ (1,178)	$ 1,758