Investments (Maturities of Fixed Maturity Securities) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Available-for-sale Securities, Debt Maturities [Abstract]
Amortized Cost, Due in one year or less	$ 8,235
Amortized Cost, Due after one year through five years	50,977
Amortized Cost, Due after five years through ten years	54,016
Amortized Cost, Due after ten years	134,023
Amortized Cost, Structured Securities	58,591
Amortized Cost, net of ACL	305,842
Estimated Fair Value, Due in one year or less	8,131
Estimated Fair Value, Due after one year through five years	49,344
Estimated Fair Value, Due after five years through ten years	50,498
Estimated Fair Value, Due after ten years	115,757
Estimated Fair Value, Structured Securities	53,050
Estimated Fair Value of Fixed Maturity Securities AFS	$ 276,780	$ 340,274