Investments (Fixed Maturity Securities AFS - Sales and Disposals and Credit Loss) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Proceeds	$ 67,754	$ 54,612	$ 40,809
Gross investment gains	935	761	1,125
Gross investment (losses)	(2,704)	(656)	(674)
Realized gains (losses) on sales and disposals	(1,769)	105	451
Net credit loss (provision) release (change in ACL recognized in earnings)	(103)	(15)	(91)
Impairment (losses)	(40)	(24)	(63)
Net credit loss (provision) release and impairment (losses)	(143)	(39)	(154)
Realized Investment Gains (Losses)	(880)	711	634
Equity securities	(47)	(69)	16
Equity Securities, FV-NI, Unrealized Gain (Loss)	(86)	177	(153)
Equity Securities, FV-NI, Gain (Loss)	(133)	108	(137)
Fixed Maturity Securities
Debt Securities, Available-for-sale [Line Items]
Realized Investment Gains (Losses)	$ (1,912)	$ 66	$ 297

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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