Investments - Available-for-sale Impairment Losses Recognized in Earnings (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Available-For-Sale Impairment Losses [Abstract]
Impairment losses recognized in earnings	$ 63	$ 44	$ 62
Change in unrealized gains on fixed maturity securities	(352)	1,400	(7,900)
Mortgage Loans
Available-For-Sale Impairment Losses [Abstract]
Losses on mortgage loans due to changes in expected credit losses	0	11	8
Corporate bonds and other
Available-For-Sale Impairment Losses [Abstract]
Impairment losses recognized in earnings	34	33	62
Asset-backed
Available-For-Sale Impairment Losses [Abstract]
Impairment losses recognized in earnings	$ 29	$ 11