Investments (Components of Net Investment Gains Losses - Asset Type) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Marketable Securities, Gain (Loss) [Abstract]
Fixed maturity securities AFS	$ (996)	$ (671)	$ (1,576)	$ (1,269)
Equity Securities, FV-NI, Gain (Loss)	32	(42)	80	(92)
Other net investment gains (losses):
Mortgage loans	(41)	48	(205)	92
Real estate and real estate joint ventures (excluding changes in estimated fair value)	13	159	31	163
Other limited partnership interests (excluding changes in estimated fair value)	3	(2)	12	16
Other gains (losses)	43	110	20	176
Subtotal - investment portfolio gains (losses)	(946)	(398)	(1,638)	(914)
Change In Estimated Fair Value Of Other Limited Partnership Interests And Real Estate Joint Ventures	2	(1)	(3)	6
Non-investment portfolio gains (losses)	(95)	(283)	(82)	(291)
Subtotal	(93)	(284)	(85)	(285)
Net investment gains (losses)	$ (1,039)	$ (682)	$ (1,723)	$ (1,199)