Investments (Components of Net Investment Gains Losses - Asset Type) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Marketable Securities, Gain (Loss) [Abstract]
Fixed maturity securities AFS	$ (157)	$ (698)	$ (488)	$ (2,274)
Net investment gains (losses)	(31)	(14)	(22)	66
Other net investment gains (losses):
Mortgage loans	(151)	11	(246)	(194)
Real estate and real estate joint ventures (excluding changes in estimated fair value)	128	1	175	32
Other limited partnership interests (excluding changes in estimated fair value)	4	0	(55)	12
Other gains (losses)	(57)	(161)	(28)	(141)
Subtotal - investment portfolio gains (losses)	(264)	(861)	(664)	(2,499)
Change In Estimated Fair Value Of Other Limited Partnership Interests And Real Estate Joint Ventures	(1)	(3)	5	(6)
Non-investment portfolio gains (losses)	188	(63)	(214)	(145)
Subtotal	187	(66)	(209)	(151)
Net investment gains (losses)	$ (77)	$ (927)	$ (873)	$ (2,650)