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
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Total	$ 110,323	$ 104,526
Available-for-sale Securities, Debt Maturities, Fair Value
Available-for-sale Securities, Debt Securities, Total	97,391	$ 117,511
Fixed Maturity AFS Securities Excluding Structured Securities [Member]
Available-for-sale Securities, Debt Maturities, Amortized Cost
Due in one year or less	2,970
Due after one year through five years	17,244
Due after five years through ten years	19,381
Due after ten years	55,561
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Total	95,156
Available-for-sale Securities, Debt Maturities, Fair Value
Due in one year or less	2,937
Due after one year through five years	16,322
Due after five years through ten years	17,241
Due after ten years	47,135
Available-for-sale Securities, Debt Securities, Total	83,635
Structured Securities [Member]
Available-for-sale Securities, Debt Maturities, Amortized Cost
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Total	15,167
Available-for-sale Securities, Debt Maturities, Fair Value
Available-for-sale Securities, Debt Securities, Total	$ 13,756

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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