Investments (Components of Net Investment Gains (Losses)) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	$ (42)	$ (120)	$ (123)	$ (163)
Fixed maturity securities
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	(23)	(96)	(57)	(133)
Equity securities
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	(1)	(1)	(2)	(3)
Mortgage loans
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	(24)	(22)	(67)	(27)
Limited partnerships and LLCs
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	1	(1)	0	(1)
Other
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	$ 5	$ 0	$ 3	$ 1