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Derivative Instruments - Cumulative Basis Adjustments for Fair Value Hedges (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Derivatives, Fair Value [Line Items]    
Amortized cost of the hedged assets $ 484 $ 534
Amortized cost of the hedged liabilities (676) (703)
Cumulative fair value hedging adjustment included in the amortized cost of the hedged assets 7 39
Cumulative fair value hedging adjustment included in the amortized cost of the hedged liabilities 199 172
Discontinued Hedges    
Derivatives, Fair Value [Line Items]    
Cumulative fair value hedging adjustment included in the amortized cost of the hedged liabilities $ (310) $ (326)