v3.26.1
Derivative Instruments and Hedging Activities - Gains Losses on Freestanding Derivatives (Details) - Other non-interest income - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) recognized in other non-interest income: $ 51 $ 56
Interest rate contracts:    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) recognized in other non-interest income: 30 17
Interest rate contracts: | Customer accommodation:    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) recognized in other non-interest income: 15 6
Interest rate contracts: | Other interest rate exposures    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) recognized in other non-interest income: 22 40
Commodity contracts | Customer accommodation:    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) recognized in other non-interest income: 11 7
Foreign exchange and other contracts | Customer accommodation:    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) recognized in other non-interest income: 4 4
Other contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) recognized in other non-interest income: $ (1) $ (1)