Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE FINANCIAL INSTRUMENTS - Gain (Loss) (Details)

v3.20.2
DERIVATIVE FINANCIAL INSTRUMENTS - Gain (Loss) (Details) - Not Designated as Hedging Instrument [Member] - Fair Value Hedging - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net $ 63 $ 48 $ 165 $ 110
Interest Rate Contract [Member] | Capital markets fees        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net 10 15 39 38
Interest Rate Contract [Member] | Mortgage banking income        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net 47 28 109 52
Interest Rate Floor [Member] | Other noninterest expense        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net 0 (1) 0 4
Foreign Exchange Contract [Member] | Capital markets fees        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net 7 7 18 22
Commodity Contract [Member] | Capital markets fees        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net 0 1 2 (3)
Equity Contract [Member] | Other noninterest expense        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net $ (1) $ (2) $ (3) $ (3)