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Derivative Financial Instruments - Amounts Related to Cash Flow Hedges (Details) - Cash Flow Hedges - Interest Rate Contracts - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Commercial loans    
Derivative Instruments, Notional, Fair Value Assets and Liabilities[Line Items]    
Pre-tax gain (loss) recognized in OCI $ 163 $ 0
Long-term debt | Interest Expense    
Derivative Instruments, Notional, Fair Value Assets and Liabilities[Line Items]    
Pre-tax gain (loss) reclassified from AOCI into expense $ 0 $ (6)