Investments (Maturities of Fixed Maturity Securities) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Available-for-sale Securities, Debt Maturities [Abstract]
Amortized Cost, Due in one year or less	$ 7,503
Amortized Cost, Due after one year through five years	50,362
Amortized Cost, Due after five years through ten years	54,206
Amortized Cost, Due after ten years	130,403
Amortized Cost, Structured Securities	59,785
Amortized Cost, net of ACL	302,259
Estimated Fair Value, Due in one year or less	7,346
Estimated Fair Value, Due after one year through five years	48,275
Estimated Fair Value, Due after five years through ten years	49,497
Estimated Fair Value, Due after ten years	111,259
Estimated Fair Value, Structured Securities	54,388
Estimated Fair Value of Fixed Maturity Securities AFS	$ 270,765	$ 340,274

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