Investments (Components of Net Investment Gains Losses - Asset Type) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Marketable Securities, Gain (Loss) [Abstract]
Fixed maturity securities AFS	$ (246)	$ (996)	$ (331)	$ (1,576)
Net investment gains (losses)	(19)	32	9	80
Other net investment gains (losses):
Mortgage loans	(9)	(41)	(95)	(205)
Real estate and real estate joint ventures (excluding changes in estimated fair value)	12	13	47	31
Other limited partnership interests (excluding changes in estimated fair value)	(9)	3	(59)	12
Other gains (losses)	23	43	29	20
Subtotal - investment portfolio gains (losses)	(248)	(946)	(400)	(1,638)
Change In Estimated Fair Value Of Other Limited Partnership Interests And Real Estate Joint Ventures	3	2	6	(3)
Non-investment portfolio gains (losses)	(176)	(95)	(402)	(82)
Subtotal	(173)	(93)	(396)	(85)
Net investment gains (losses)	$ (421)	$ (1,039)	$ (796)	$ (1,723)