Investments (Available-For-Sale Securities By Contractual Maturities) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Available-for-sale Securities, Debt Maturities, Amortized Cost
Amortized Cost	$ 109,647	$ 105,177
Available-for-sale Securities, Debt Maturities, Fair Value
Fair Value	103,365	$ 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	2,954
Due after one year through five years	16,924
Due after five years through ten years	19,019
Due after ten years	56,527
Amortized Cost	95,424
Available-for-sale Securities, Debt Maturities, Fair Value
Due in one year or less	2,937
Due after one year through five years	16,490
Due after five years through ten years	17,808
Due after ten years	52,681
Fair Value	89,916
Structured securities [Member]
Available-for-sale Securities, Debt Maturities, Amortized Cost
Amortized Cost	14,223
Available-for-sale Securities, Debt Maturities, Fair Value
Fair Value	$ 13,449

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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