v3.25.2
DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Derivatives Not Designated as Hedges) (Details) - Derivatives not designated as hedging instruments - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Derivative Instruments, Gain (Loss) [Line Items]        
Other Noninterest Income/(Expense) $ 18 $ 13 $ 30 $ 28
Customer-facing interest rate derivatives        
Derivative Instruments, Gain (Loss) [Line Items]        
Other Noninterest Income/(Expense) 11 6 18 12
Other interest rate derivatives        
Derivative Instruments, Gain (Loss) [Line Items]        
Other Noninterest Income/(Expense) 0 0 (1) 1
Foreign exchange derivatives        
Derivative Instruments, Gain (Loss) [Line Items]        
Other Noninterest Income/(Expense) 8 7 14 15
Purchased credit derivatives        
Derivative Instruments, Gain (Loss) [Line Items]        
Other Noninterest Income/(Expense) $ (1) $ 0 $ (1) $ 0