v3.26.1
Derivative Instruments and Hedging Activities - Gains Losses on Freestanding Derivatives (Details) - Income Statement Location [Axis]: us-gaap:NoninterestIncomeOther - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) recognized in other non-interest income: $ 26 $ 54 $ 77 $ 110
Interest rate contracts:        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) recognized in other non-interest income: 20 24 50 41
Interest rate contracts: | Customer accommodation:        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) recognized in other non-interest income: 9 14 24 20
Interest rate contracts: | Other interest rate exposures        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) recognized in other non-interest income: 24 39 46 79
Commodity contracts | Customer accommodation:        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) recognized in other non-interest income: 4 5 15 12
Foreign exchange and other contracts | Customer accommodation:        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) recognized in other non-interest income: 7 5 11 9
Other contracts        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) recognized in other non-interest income: $ (18) $ (9) $ (19) $ (10)