Investments (Maturities of Fixed Maturity Securities) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Available-for-sale Securities, Debt Maturities [Abstract]
Amortized Cost, Due in one year or less	$ 10,989
Amortized Cost, Due after one year through five years	49,265
Amortized Cost, Due after five years through ten years	52,614
Amortized Cost, Due after ten years	126,504
Amortized Cost, Structured Securities	67,889
Amortized Cost, net of ACL	307,261
Estimated Fair Value, Due in one year or less	10,987
Estimated Fair Value, Due after one year through five years	48,816
Estimated Fair Value, Due after five years through ten years	50,454
Estimated Fair Value, Due after ten years	106,427
Estimated Fair Value, Structured Securities	64,359
Estimated Fair Value of Fixed Maturity Securities AFS	$ 281,043	$ 281,412