Schedule I - Condensed Financial Information of Registrant, Statements of Operations and Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues:
Investment loss	$ (81)	$ (53)	$ (199)
Total	17,510	15,901	14,044
Expenses:
Interest	441	376	378
Total	15,636	13,905	12,930
Income (loss) before income tax	1,874	1,996	1,114
Income tax (expense) benefit	(380)	(451)	(223)
Net income (loss)	1,494	1,545	891
Total comprehensive income (loss) attributable to Loews Corporation	2,044	2,318	(1,178)
Loews Corporation
Revenues:
Equity in income of subsidiaries	1,328	1,501	963
Net investment income, interest and other	261	131	1
Investment loss
Total	1,589	1,632	964
Expenses:
Administrative	76	119	84
Interest	75	80	89
Total	151	199	173
Income (loss) before income tax	1,438	1,433	791
Income tax (expense) benefit	(24)	1	31
Net income (loss)	1,414	1,434	822
Equity in other comprehensive income (loss) of subsidiaries	630	884	(2,000)
Total comprehensive income (loss) attributable to Loews Corporation	$ 2,044	$ 2,318	$ (1,178)