Investments (Fixed Maturity Securities AFS - Sales and Disposals and Credit Loss) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Proceeds	$ 14,024	$ 15,640
Gross investment gains	109	218
Gross investment (losses)	(403)	(259)
Realized gains (losses) on sales and disposals	(294)	(41)
Net credit loss (provision) release (change in ACL recognized in earnings)	(264)	(26)
Impairment (loss)	(40)	0
Net credit loss (provision) release and impairment (loss)	(304)	(26)
Net investment gains (losses)	(211)	3
Equity securities	(30)	(32)
Equity Securities, FV-NI, Unrealized Gain (Loss)	(20)	107
Equity Securities, FV-NI, Gain (Loss)	(50)	75
Fixed Maturity Securities
Debt Securities, Available-for-sale [Line Items]
Net investment gains (losses)	$ (598)	$ (67)

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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