Investments (Supplemental Net Investment Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net Investment Income [Line Items]
Debt and Equity Securities, Realized Gain (Loss)	$ (725)	$ 1,229	$ 1,056
Equity Securities, FV-NI, Unrealized Gain (Loss)	(86)	177	(153)
Income (Loss) from Equity Method Investments	1,305	5,136	829
Net investment income
Net Investment Income [Line Items]
Debt and Equity Securities, Realized Gain (Loss)	155	518	422
Debt and Equity Securities, Unrealized Gain (Loss)	(1,586)	616	233
Debt and Equity Securities, Gain (Loss)	(1,431)	1,134	655
Unit-linked investments
Net Investment Income [Line Items]
Equity Securities, FV-NI, Unrealized Gain (Loss)	$ (1,286)	$ 730	$ 489