Investments (Fixed Maturity Securities AFS - Sales and Disposals and Credit Loss) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Debt Securities, Available-for-sale [Line Items]
Proceeds	$ 6,815	$ 9,263	$ 21,273	$ 32,719
Gross investment gains	111	63	388	429
Gross investment (losses)	(228)	(334)	(898)	(1,403)
Realized gains (losses) on sales and disposals	(117)	(271)	(510)	(974)
Net credit loss (provision) release (change in ACL recognized in earnings)	(40)	17	22	0
Impairment (losses)	0	(444)	0	(1,300)
Net credit loss (provision) release and impairment (losses)	(40)	(427)	22	(1,300)
Net investment gains (losses)	(39)	(281)	(369)	(847)
Equity securities	27	0	25	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)	(58)	(14)	(47)	44
Net investment gains (losses)	(31)	(14)	(22)	66
Fixed Maturity Securities
Debt Securities, Available-for-sale [Line Items]
Net investment gains (losses)	$ (157)	$ (698)	$ (488)	$ (2,274)

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