Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE FINANCIAL INSTRUMENTS - MSR Hedging Activities (Details)

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DERIVATIVE FINANCIAL INSTRUMENTS - MSR Hedging Activities (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Remaining maturity 1 year    
Notional Value $ 25,957   $ 21,577
Derivative used in Mortgage Banking Activities      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative, Fair Value, Net 30   15
Notional Value 1,050   1,330
Trading assets 0   19
Trading liabilities (24)   0
Trading gains (47) $ (46)  
Commitments to sell loans      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Commitments to sell residential real estate loans $ 1,600   $ 2,100