Investments (Components of Net Investment Gains (Losses)) (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Jul. 31, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)		$ (102)	$ (298)	$ (242)
Fixed maturity securities
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)		(88)	(243)	(214)
Equity securities
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)		(1)	(12)	(1)
Mortgage loans
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)		(83)	(55)	(24)
Limited partnerships and LLCs
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)		2	(2)	(1)
Other
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	$ 66	$ 68	$ 14	$ (2)