v3.25.2
DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Derivative Gain (Loss) Recognized/Reclassified) (Details) - 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]        
Amount of gain (loss) reclassified from AOCI into income $ (15) $ (23) $ (34) $ (48)
Loss to be reclassified within the next 12 months into interest income     45 88
Deferred losses 60   60  
Derivatives designated as hedging instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Effective portion of derivative gain (loss) deferred in AOCI 2 0 8 (1)
Amount of gain (loss) reclassified from AOCI into income (18) (31) (37) (65)
Interest on fair value hedges 12 22 22 43
Derivatives designated as hedging instruments: | Cash Flow Hedging        
Derivative Instruments, Gain (Loss) [Line Items]        
Terminated or redesignated, unamortized basis adjustments, debt 36 43 36 43
Terminated or redesignated, unamortized basis adjustments, assets 3 3 3 3
Derivatives designated as hedging instruments: | Cash Flow Hedging | Hedges of floating-rate assets        
Derivative Instruments, Gain (Loss) [Line Items]        
Effective portion of derivative gain (loss) deferred in AOCI 2 (1) 8 (6)
Amount of gain (loss) reclassified from AOCI into income (18) (33) (38) (69)
Interest on fair value hedges 0 0 0 0
Derivatives designated as hedging instruments: | Cash Flow Hedging | Hedges of floating-rate liabilities        
Derivative Instruments, Gain (Loss) [Line Items]        
Effective portion of derivative gain (loss) deferred in AOCI 0 1 0 5
Amount of gain (loss) reclassified from AOCI into income 0 2 1 4
Interest on fair value hedges 0 0 0 0
Derivatives designated as hedging instruments: | Fair Value Hedging | Hedges of fixed-rate assets        
Derivative Instruments, Gain (Loss) [Line Items]        
Effective portion of derivative gain (loss) deferred in AOCI 0 0 0 0
Amount of gain (loss) reclassified from AOCI into income 0 0 0 0
Interest on fair value hedges 14 24 (5) 46
Derivatives designated as hedging instruments: | Fair Value Hedging | Hedges of fixed-rate liabilities        
Derivative Instruments, Gain (Loss) [Line Items]        
Effective portion of derivative gain (loss) deferred in AOCI 0 0 0 0
Amount of gain (loss) reclassified from AOCI into income 0 0 0 0
Interest on fair value hedges $ (2) $ (2) $ 27 $ (3)