Investments (Maturities of Fixed Maturity Securities) (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Available-for-sale Securities, Debt Maturities [Abstract]
Amortized Cost, Due in one year or less	$ 5,984
Amortized Cost, Due after one year through five years	26,171
Amortized Cost, Due after five years through ten years	28,361
Amortized Cost, Due after ten years	59,221
Amortized Cost, Structured Securities	49,694
Amortized Cost, net of ACL	169,431
Estimated Fair Value, Due in one year or less	5,949
Estimated Fair Value, Due after one year through five years	25,848
Estimated Fair Value, Due after five years through ten years	27,822
Estimated Fair Value, Due after ten years	51,404
Estimated Fair Value, Structured Securities	48,319
Estimated Fair Value of Fixed Maturity Securities AFS	$ 159,342	$ 159,332

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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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