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Derivative Financial Instruments - Schedule of Exposure to Credit Loss on Call Options Held (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Fair Value | $ 1,267 | $ 827
Derivatives not designated as hedging instruments |  |
Derivatives, Fair Value [Line Items] |  |
Fair Value | 1,255 | 825
Derivatives not designated as hedging instruments | Derivative instruments excluding futures contracts |  |
Derivatives, Fair Value [Line Items] |  |
Fair Value | 1,214 | 782
Collateral | 1,165 | 771
Net Credit Risk | $ 57 | $ 34

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