Investments (Components of Net Investment Gains (Losses)) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	$ (65)	$ (64)	$ (161)	$ (131)
Fixed maturity securities
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	(55)	(60)	(129)	(101)
Equity securities
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	1	(4)	(4)	(10)
Mortgage loans
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	(10)	1	(27)	(3)
Limited partnerships and LLCs
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	0	(1)	0	(17)
Other
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	$ (1)	$ 0	$ (1)	$ 0