Investments (Components of Net Investment Gains Losses - Asset Type) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Marketable Securities, Gain (Loss) [Abstract]
Fixed maturity securities AFS	$ (124)	$ (246)	$ (368)	$ (331)
Net investment gains (losses)	45	(19)	33	9
Other net investment gains (losses):
Mortgage loans	(269)	(9)	(461)	(95)
Real estate and real estate joint ventures (excluding changes in estimated fair value)	3	12	3	47
Other limited partnership interests (excluding changes in estimated fair value)	21	(9)	20	(59)
Other gains (losses)	(33)	23	(38)	29
Subtotal - investment portfolio gains (losses)	(357)	(248)	(811)	(400)
Change In Estimated Fair Value Of Other Limited Partnership Interests And Real Estate Joint Ventures	(3)	3	0	6
Non-investment portfolio gains (losses)	87	(176)	151	(402)
Subtotal	84	(173)	151	(396)
Net investment gains (losses)	$ (273)	$ (421)	$ (660)	$ (796)