Investments (Supplemental Net Investment Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Net Investment Income [Line Items]
Debt and Equity Securities, Realized Gain (Loss)	$ 21	$ (405)	$ (487)	$ (547)
Equity Securities, FV-NI, Unrealized Gain (Loss)	17	(42)	58	(62)
Income (Loss) from Equity Method Investments	172	386	79	1,474
Net investment income
Net Investment Income [Line Items]
Debt and Equity Securities, Realized Gain (Loss)	41	40	79	109
Debt and Equity Securities, Unrealized Gain (Loss)	330	(817)	652	(1,409)
Debt and Equity Securities, Gain (Loss)	371	(777)	731	(1,300)
Unit-linked investments
Net Investment Income [Line Items]
Equity Securities, FV-NI, Unrealized Gain (Loss)	$ 291	$ (802)	$ 591	$ (1,276)