Investments (Maturities of Fixed Maturity Securities) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Available-for-sale Securities, Debt Maturities [Abstract]
Amortized Cost, Due in one year or less	$ 7,495
Amortized Cost, Due after one year through five years	49,816
Amortized Cost, Due after five years through ten years	55,072
Amortized Cost, Due after ten years	128,505
Amortized Cost, Structured Securities	58,383
Amortized Cost, net of ACL	299,271
Estimated Fair Value, Due in one year or less	7,428
Estimated Fair Value, Due after one year through five years	49,014
Estimated Fair Value, Due after five years through ten years	52,943
Estimated Fair Value, Due after ten years	119,566
Estimated Fair Value, Structured Securities	55,227
Estimated Fair Value of Fixed Maturity Securities AFS	$ 284,178	$ 340,274