Investments (Fixed Maturity Securities AFS - Sales and Disposals and Credit Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Debt Securities, Available-for-sale [Line Items]
Proceeds	$ 9,263	$ 15,484	$ 32,719	$ 50,218
Gross investment gains	63	124	429	464
Gross investment (losses)	(334)	(457)	(1,403)	(1,861)
Realized gains (losses) on sales and disposals	(271)	(333)	(974)	(1,397)
Net credit loss (provision) release (change in ACL recognized in earnings)	17	50	0	(120)
Impairment (losses)	(444)	(3)	(1,300)	(38)
Net credit loss (provision) release and impairment (losses)	(427)	47	(1,300)	(158)
Net investment gains (losses)	(281)	(252)	(847)	(908)
Equity securities	0	3	22	(27)
Equity Securities, FV-NI, Unrealized Gain (Loss)	(14)	(26)	44	(88)
Equity Securities, FV-NI, Gain (Loss)	(14)	(23)	66	(115)
Fixed Maturity Securities
Debt Securities, Available-for-sale [Line Items]
Net investment gains (losses)	$ (698)	$ (286)	$ (2,274)	$ (1,555)