Investments (Investment Related Gains (Losses) Net) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Investments [Abstract]
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net	$ (29)	$ (16)	$ (35)	$ (36)
Gain on investment activity	30	68	66	100
Available-for-sale Securities, Realized Losses, Excluding Other than Temporary Impairments	(65)	(230)	(152)	(364)
Gain (Loss) on Sale of Equity Investments	3	(5)	2	(1)
Other impairment losses and change in mortgage loan provision	(18)	2	(14)	(8)
Derivatives and other, net	(3)	7	(2)	16
Total investment related gains (losses), net	(44)	(271)	(123)	(420)
Change In Fair Value Of Certain Limited Partnership Investments And Other, Net	6	0	(1)	1
Impairment Losses On Debt Securities Available for Sale	(2)	(1)	(2)	(1)
Gain (Loss) on Sale of Derivatives	50	(119)	48	(218)
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net	3	26	(8)	103
Other Receivable, Allowance for Credit Loss, Noncurrent	(3)	(3)	(4)	(4)
Gains (Losses) on Sales of Other Real Estate	$ (16)	$ 0	$ (21)	$ (8)