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
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Total	$ 109,019	$ 104,526
Available-for-sale Securities, Debt Maturities, Fair Value
Available-for-sale Securities, Debt Securities, Total	103,002	$ 117,511
Fixed Maturity AFS Securities Excluding Structured Securities [Member]
Available-for-sale Securities, Debt Maturities, Amortized Cost
Due in one year or less	2,789
Due after one year through five years	16,988
Due after five years through ten years	19,461
Due after ten years	55,768
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Total	95,006
Available-for-sale Securities, Debt Maturities, Fair Value
Due in one year or less	2,771
Due after one year through five years	16,561
Due after five years through ten years	18,259
Due after ten years	52,165
Available-for-sale Securities, Debt Securities, Total	89,756
Structured Securities [Member]
Available-for-sale Securities, Debt Maturities, Amortized Cost
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Total	14,013
Available-for-sale Securities, Debt Maturities, Fair Value
Available-for-sale Securities, Debt Securities, Total	$ 13,246

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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