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Investments (Amortized Cost and Fair Value of Fixed Maturities by Contractual Maturities) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Available For Sale Securities Debt Maturities Amortized Cost
Due in one year or less	$ 1,480
Due after one year through five years	9,448
Due after five year through ten years	11,292
Due after ten years	28,348
Asset and mortgage-backed securities	7,062
Total	57,630	$ 55,873
Available For Sale Securities Debt Maturities Fair Value
Due in one year or less	1,473
Due after one year through five years	9,138
Due after five year through ten years	10,015
Due after ten years	23,523
Asset and mortgage-backed securities	6,346
Total	$ 50,495	$ 60,749

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