Investments (Components of Net Investment Gains (Losses)) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	$ (120)	$ (65)	$ (163)	$ (161)
Fixed maturity securities
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	(96)	(55)	(133)	(129)
Equity securities
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	(1)	1	(3)	(4)
Mortgage loans
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	(22)	(10)	(27)	(27)
Limited partnerships and LLCs
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	(1)	0	(1)	0
Other assets
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	$ 0	$ (1)	$ 1	$ (1)