Investments (Components of Net Investment Gains (Losses)) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	$ (67)	$ 12
Fixed maturity securities
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	(41)	8
Equity securities
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	(6)	0
Mortgage loans
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	(4)	4
Limited partnerships and LLCs
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	$ (16)	$ 0