Investments (Fixed Maturity Securities AFS - Sales and Disposals and Credit Loss) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Debt Securities, Available-for-sale [Line Items]
Proceeds	$ 8,106	$ 8,412	$ 14,458	$ 23,456
Gross investment gains	121	73	277	366
Gross investment (losses)	(358)	(213)	(670)	(1,069)
Realized gains (losses) on sales and disposals	(237)	(140)	(393)	(703)
Net credit loss (provision) release (change in ACL recognized in earnings)	(9)	(7)	62	(17)
Impairment (losses)	0	(849)	0	(856)
Net credit loss (provision) release and impairment (losses)	(9)	(856)	62	(873)
Net investment gains (losses)	(195)	(20)	(330)	(566)
Equity securities	0	15	(2)	22
Changes in estimated fair value subsequent to purchase of equity securities still held at the end of the respective periods and recognized in net investment gains (losses)	(19)	17	11	58
Net investment gains (losses)	(19)	32	9	80
Fixed Maturity Securities
Debt Securities, Available-for-sale [Line Items]
Net investment gains (losses)	$ (246)	$ (996)	$ (331)	$ (1,576)

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