Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE FINANCIAL INSTRUMENTS - Fair Value Hedges (Details)

v3.20.2
DERIVATIVE FINANCIAL INSTRUMENTS - Fair Value Hedges (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]          
Amortized Cost $ 14,599   $ 14,599   $ 7,578
Cumulative Amount of Fair Value Hedging Adjustment To Hedged Items 275   275   114
Fair value hedging adjustments     69   93
Investment Securities [Member]          
Derivative Instruments, Gain (Loss) [Line Items]          
Amortized Cost 7,389   7,389   0
Cumulative Amount of Fair Value Hedging Adjustment To Hedged Items 1   1   0
Amortized cost basis of the closed portfolios used in hedging relationships 7,200   7,200    
Designated hedged items 3,100   3,100    
Subordinated notes [Member]          
Derivative Instruments, Gain (Loss) [Line Items]          
Amortized Cost 7,210   7,210   7,578
Cumulative Amount of Fair Value Hedging Adjustment To Hedged Items 274   274   $ 114
Interest income available for sale securities taxable [Member] | Investment Securities [Member]          
Derivative Instruments, Gain (Loss) [Line Items]          
Change in fair value for derivatives designated as fair value hedges 0 $ 0 (1) $ 0  
Interest income available for sale securities taxable [Member] | Hedged investment securities [Member]          
Derivative Instruments, Gain (Loss) [Line Items]          
Change in fair value for derivatives designated as fair value hedges 0 0 1 0  
Interest expense subordinated notes and other long term debt [Member] | Subordinated notes [Member]          
Derivative Instruments, Gain (Loss) [Line Items]          
Change in fair value for derivatives designated as fair value hedges (36) 36 159 165  
Interest expense subordinated notes and other long term debt [Member] | Hedged Subordinated notes [Member]          
Derivative Instruments, Gain (Loss) [Line Items]          
Change in fair value for derivatives designated as fair value hedges $ 35 $ (32) $ (160) $ (162)