Investments (Components of Net Investment Gains (Losses)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	$ (240)	$ (63)	$ 279
Fixed maturity securities
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	(188)	(22)	298
Equity securities
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	(12)	0	0
Mortgage loans
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	(20)	(29)	(27)
Limited partnerships and LLCs
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	(20)	0	(3)
Other
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	$ 0	$ (12)	$ 11