Investments (Investment Related Gains (Losses) Net) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Investments [Abstract]
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net	$ (28)	$ (9)	$ (63)	$ (45)
Gain on investment activity	96	72	162	172
Available-for-sale Securities, Realized Losses, Excluding Other than Temporary Impairments	(65)	(113)	(217)	(477)
Gain (Loss) on Sale of Equity Investments	5	6	7	5
Other impairment losses and change in mortgage loan provision	(6)	(12)	(20)	(20)
Derivatives and other, net	4	(14)	2	2
Total investment related gains (losses), net	13	(78)	(110)	(498)
Change In Fair Value Of Certain Limited Partnership Investments And Other, Net	9	17	8	18
Impairment Losses On Debt Securities Available for Sale	(1)	0	(3)	(1)
Gain (Loss) on Sale of Derivatives	32	87	80	(131)
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net	(33)	(112)	(41)	(9)
Other Receivable, Allowance for Credit Loss, Noncurrent	1	0	(3)	(4)
Gains (Losses) on Sales of Other Real Estate	$ (1)	$ 0	$ (22)	$ (8)