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Derivative Instruments - Cumulative Basis Adjustments for Fair Value Hedges (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Derivatives, Fair Value [Line Items]    
Amortized cost of the hedged assets $ 534 $ 587
Amortized cost of the hedged liabilities (703) (698)
Cumulative fair value hedging adjustment included in the amortized cost of the hedged assets 39 44
Cumulative fair value hedging adjustment included in the amortized cost of the hedged liabilities 172 177
Discontinued Hedges    
Derivatives, Fair Value [Line Items]    
Cumulative fair value hedging adjustment included in the amortized cost of the hedged liabilities $ 326 $ 341