Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE FINANCIAL INSTRUMENTS - Hedging Instruments (Details)

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DERIVATIVE FINANCIAL INSTRUMENTS - Hedging Instruments (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount $ 34,208 $ 33,327
Asset derivatives included in accrued income and other assets    
Total contracts 1,829 1,946
Liability derivatives included in accrued expenses and other liabilities    
Total contracts 874 1,033
Accrued income and other assets    
Asset derivatives included in accrued income and other assets    
Interest rate contracts designated as hedging instruments 638 719
Interest rate contracts not designated as hedging instruments 1,034 1,074
Foreign exchange contracts not designated as hedging instruments 44 46
Commodities contracts not designated as hedging instruments 101 107
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value 12 0
Total contracts 1,829 1,946
Accrued expenses and other liabilities    
Liability derivatives included in accrued expenses and other liabilities    
Interest rate contracts designated as hedging instruments 42 51
Interest rate contracts not designated as hedging instruments 686 828
Foreign exchange contracts not designated as hedging instruments 42 47
Commodities contracts not designated as hedging instruments 98 103
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value 6 4
Total contracts 874 1,033
Designated as Hedging Instrument [Member] | Accrued income and other assets    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 24,937 27,056
Not Designated as Hedging Instrument [Member] | Accrued income and other assets    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 85,628 76,738
Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Accrued income and other assets    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 55,792 44,495
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Accrued income and other assets    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 2,737 2,718
Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] | Accrued income and other assets    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 1,660 1,952
Not Designated as Hedging Instrument [Member] | Equity Contract [Member] | Accrued income and other assets    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount $ 502 $ 517