Investments (Supplemental Net Investment Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Net Investment Income [Line Items]
Debt and Equity Securities, Realized Gain (Loss)	$ (166)	$ (821)	$ (725)
Equity Securities, FV-NI, Unrealized Gain (Loss)	(65)	60	(86)
Income (Loss) from Equity Method Investments	988	151	1,305
Net investment income
Net Investment Income [Line Items]
Debt and Equity Securities, Realized Gain (Loss)	270	207	155
Debt and Equity Securities, Unrealized Gain (Loss)	931	1,168	(1,586)
Debt and Equity Securities, Gain (Loss)	1,201	1,375	(1,431)
Unit-linked investments
Net Investment Income [Line Items]
Equity Securities, FV-NI, Unrealized Gain (Loss)	$ 925	$ 1,119	$ (1,286)