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Derivative And Credit-Related Financial Instruments (Schedule Of Net Gains Recognized In Income On Customer-Initiated Derivatives) (Details) - Customer-initiated and other activities - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Derivative Instruments, Gain (Loss) [Line Items]      
Net gains recognized in income on customer-initiated derivative instruments $ 87 $ 98 $ 109
Interest rate contracts      
Derivative Instruments, Gain (Loss) [Line Items]      
Net derivative gain recognized in income 21 22 34
Foreign exchange contracts      
Derivative Instruments, Gain (Loss) [Line Items]      
Net derivative gain recognized in income 47 51 47
Energy Contracts      
Derivative Instruments, Gain (Loss) [Line Items]      
Net derivative gain recognized in income $ 19 $ 25 $ 28