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
Sep. 30, 2021
Dec. 31, 2020
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount $ 20,324 $ 33,327
Asset derivatives included in accrued income and other assets    
Total contracts 1,586 1,946
Liability derivatives included in accrued expenses and other liabilities    
Total contracts 1,063 1,033
Accrued income and other assets    
Asset derivatives included in accrued income and other assets    
Interest rate contracts not designated as hedging instruments 772 1,074
Foreign exchange contracts not designated as hedging instruments 35 46
Commodities contracts not designated as hedging instruments 353 107
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value 13 0
Total contracts 1,586 1,946
Accrued expenses and other liabilities    
Liability derivatives included in accrued expenses and other liabilities    
Interest rate contracts not designated as hedging instruments 665 828
Foreign exchange contracts not designated as hedging instruments 30 47
Commodities contracts not designated as hedging instruments 351 103
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value 5 4
Total contracts 1,063 1,033
Interest Rate Contract [Member] | Accrued income and other assets    
Asset derivatives included in accrued income and other assets    
Interest rate contracts designated as hedging instruments 413 719
Interest Rate Contract [Member] | Accrued expenses and other liabilities    
Liability derivatives included in accrued expenses and other liabilities    
Interest rate contracts designated as hedging instruments 12 51
Foreign Exchange Contract [Member] | Accrued income and other assets    
Asset derivatives included in accrued income and other assets    
Interest rate contracts designated as hedging instruments 0 0
Foreign Exchange Contract [Member] | Accrued expenses and other liabilities    
Liability derivatives included in accrued expenses and other liabilities    
Interest rate contracts designated as hedging instruments 0 0
Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Accrued income and other assets    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 20,053 27,056
Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Accrued income and other assets    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 209 0
Not Designated as Hedging Instrument [Member] | Accrued income and other assets    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 79,879 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 54,089 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 3,568 2,718
Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] | Accrued income and other assets    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 1,255 1,952
Not Designated as Hedging Instrument [Member] | Equity Contract [Member] | Accrued income and other assets    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount $ 705 $ 517