Investments (Fixed Maturity Securities AFS - Sales and Disposals and Credit Loss) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Debt Securities, Available-for-sale [Line Items]
Proceeds	$ 15,484	$ 10,743	$ 50,218	$ 37,306
Gross investment gains	124	217	464	580
Gross investment (losses)	(457)	(106)	(1,861)	(497)
Realized gains (losses) on sales and disposals	(333)	111	(1,397)	83
Net credit loss (provision) release (change in ACL recognized in earnings)	50	29	(120)	8
Impairment (loss)	(3)	(11)	(38)	(24)
Net credit loss (provision) release and impairment (loss)	47	18	(158)	(16)
Net investment gains (losses)	(252)	202	(908)	639
Equity securities	3	(27)	(27)	(61)
Equity Securities, FV-NI, Unrealized Gain (Loss)	(26)	(6)	(88)	158
Equity Securities, FV-NI, Gain (Loss)	(23)	(33)	(115)	97
Fixed Maturity Securities
Debt Securities, Available-for-sale [Line Items]
Net investment gains (losses)	$ (286)	$ 129	$ (1,555)	$ 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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