Statutory Information and Restrictions - Net Gain (Loss) from Operations, Net Income Loss, Dividends to LNC Holding Company (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statutory Information and Restrictions [Abstract]
U.S. net gain (loss) from operations, after-tax	$ (3,192)	$ (2,495)	$ 1,708
U.S. net income (loss)	(2,283)	(2,924)	1,965
U.S. cash dividends to LNC holding company	$ 491	$ 495	$ 645