Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE FINANCIAL INSTRUMENTS - Gain (Loss) (Details)

v3.21.2
DERIVATIVE FINANCIAL INSTRUMENTS - Gain (Loss) (Details) - Not Designated as Hedging Instrument [Member] - Fair Value Hedging - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net $ (58) $ 24 $ 89 $ 104
Interest Rate Contract [Member] | Capital markets fees        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net 12 12 24 29
Interest Rate Contract [Member] | Mortgage banking income        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net (23) 6 (29) 63
Interest Rate Floor [Member] | Other noninterest expense        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net (2) 0 (4) 0
Foreign Exchange Contract [Member] | Capital markets fees        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net 7 6 13 12
Commodity Contract [Member] | Capital markets fees        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net 0 1 0 3
Equity Contract [Member] | Other noninterest expense        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net 3 (1) (4) (3)
Interest Rate Cap | Other noninterest expense        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net $ (55) $ 0 $ 89 $ 0