Investments (Fixed Maturity Securities AFS - Narrative) (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value of Fixed Maturity Securities AFS	$ 291,735	$ 281,043
Gross Unrealized Gains (Losses)	$ (29,031)	$ (31,199)

Amount 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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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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