Investments - Available-for-sale Impairment Losses Recognized in Earnings (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Available-For-Sale Impairment Losses [Abstract]
Impairment losses recognized in earnings	$ 33	$ 63	$ 44
Change in unrealized gains on fixed maturity securities	1,100	(352)	1,400
Mortgage Loans
Available-For-Sale Impairment Losses [Abstract]
Losses on mortgage loans due to changes in expected credit losses	5	0	11
Corporate bonds and other
Available-For-Sale Impairment Losses [Abstract]
Impairment losses recognized in earnings	25	34	33
Asset-backed
Available-For-Sale Impairment Losses [Abstract]
Impairment losses recognized in earnings	$ 8	$ 29	$ 11