Schedule I - Condensed Financial Information of Registrant, Statements of Operations and Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues:
Investment loss	$ (199)	$ 660	$ (1,246)
Total	14,044	14,657	12,583
Expenses:
Interest	378	424	515
Total	12,663	12,475	14,047
Income tax (expense) benefit	(278)	(479)	173
Net income (loss)	1,103	1,703	(1,291)
Total comprehensive income (loss) attributable to Loews Corporation	(2,458)	1,183	(282)
Loews Corporation
Revenues:
Equity in income of subsidiaries	1,153	1,655	120
Net investment income, interest and other	1	103	65
Investment loss		(15)	(1,211)
Total	1,154	1,743	(1,026)
Expenses:
Administrative	84	93	98
Interest	89	89	83
Total	173	182	181
Income (loss) before income tax	981	1,561	(1,207)
Income tax (expense) benefit	31	17	276
Net income (loss)	1,012	1,578	(931)
Equity in other comprehensive income (loss) of subsidiaries	(3,470)	(395)	649
Total comprehensive income (loss) attributable to Loews Corporation	$ (2,458)	$ 1,183	$ (282)