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Derivatives (Credit Risk on Freestanding Derivatives) (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Credit Derivatives [Line Items] |  |
Collateral Amount Not Provided Due to Downgrade Threshold | $ 15 |
Estimated fair value of derivatives in a net liability position (1) | 3,333 | $ 2,447
Derivative assets | 8,212 | 8,737
Derivative liabilities | 7,259 | 6,298
Fixed maturity securities AFS |  |
Credit Derivatives [Line Items] |  |
Estimated fair value of collateral provided: | 3,953 | 3,017
Accrued Liabilities [Member] |  |
Credit Derivatives [Line Items] |  |
Derivative assets | 158 | 181
Derivative liabilities | 13 | 9
Derivatives Subject to Credit-Contingent Provisions |  |
Credit Derivatives [Line Items] |  |
Estimated fair value of derivatives in a net liability position (1) | 3,213 | 2,443
Derivatives Subject to Credit-Contingent Provisions | Fixed maturity securities AFS |  |
Credit Derivatives [Line Items] |  |
Estimated fair value of collateral provided: | 3,829 | 3,011
Derivatives Not Subject to Credit-Contingent Provisions |  |
Credit Derivatives [Line Items] |  |
Estimated fair value of derivatives in a net liability position (1) | 120 | 4
Derivatives Not Subject to Credit-Contingent Provisions | Fixed maturity securities AFS |  |
Credit Derivatives [Line Items] |  |
Estimated fair value of collateral provided: | $ 124 | $ 6

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