Investments (Available-For-Sale Securities By Contractual Maturities) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Available-for-sale Securities, Debt Maturities, Amortized Cost
Amortized Cost	$ 111,058	$ 105,177
Available-for-sale Securities, Debt Maturities, Fair Value
Fair Value	97,572	$ 118,746
Fixed maturity AFS securities other than structured securities [Member]
Available-for-sale Securities, Debt Maturities, Amortized Cost
Due in one year or less	3,138
Due after one year through five years	17,300
Due after five years through ten years	18,948
Due after ten years	56,298
Amortized Cost	95,684
Available-for-sale Securities, Debt Maturities, Fair Value
Due in one year or less	3,105
Due after one year through five years	16,361
Due after five years through ten years	16,779
Due after ten years	47,383
Fair Value	83,628
Structured securities [Member]
Available-for-sale Securities, Debt Maturities, Amortized Cost
Amortized Cost	15,374
Available-for-sale Securities, Debt Maturities, Fair Value
Fair Value	$ 13,944

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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