Investments (Fixed Maturity Securities AFS - Sales and Disposals and Credit Loss) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Proceeds	$ 15,044	$ 14,024
Gross investment gains	293	109
Gross investment (losses)	(856)	(403)
Realized gains (losses) on sales and disposals	(563)	(294)
Net credit loss (provision) release (change in ACL recognized in earnings)	(10)	(264)
Impairment (losses)	(7)	(40)
Net credit loss (provision) release and impairment (losses)	(17)	(304)
Net investment gains (losses)	(546)	(211)
Equity securities	7	(30)
Equity Securities, FV-NI, Unrealized Gain (Loss)	41	(20)
Equity Securities, FV-NI, Gain (Loss)	48	(50)
Fixed Maturity Securities
Debt Securities, Available-for-sale [Line Items]
Net investment gains (losses)	$ (580)	$ (598)

Amount of increase (decrease) in allowance for credit loss of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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