Investments (Evaluation of Fixed Maturity Securities AFS in an Unrealized Loss Position - Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Change in Gross Unrealized Temporary Loss	$ (6,524)	$ 10,325	$ (56,497)
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	31,200
Equal to or Greater than 12 Months ,Gross Unrealized Loss	26,877	24,394
Below Investment Grade
Debt Securities, Available-for-sale [Line Items]
Equal to or Greater than 12 Months ,Gross Unrealized Loss	552	$ 719
Fixed maturity securities without an allowance for credit loss
Debt Securities, Available-for-sale [Line Items]
Change in Gross Unrealized Temporary Loss	$ 5,400