Investments (Components of Net Investment Gains (Losses)) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	$ (96)	$ (67)
Fixed maturity securities
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	(74)	(41)
Equity securities
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	(5)	(6)
Mortgage loans
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	(17)	(4)
Limited partnerships and LLCs
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	$ 0	$ (16)