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Commitments, Contingencies and Guarantees (Credit Risk Of Financial Instruments By Contractual Amounts) (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]        
Unused commitments to extend credit $ 63,232 $ 63,631    
Standby letters of credit 2,096 1,997    
Commercial letters of credit 58 78    
Liabilities associated with standby letters of credit 33 32    
Assets associated with standby letters of credit 35 34    
Reserve for unfunded credit commitments $ 116 $ 124 $ 118 $ 95