Quarterly report pursuant to Section 13 or 15(d)

LOAN SALES AND SECURITIZATIONS - Small Business Association Portfolio (Details)

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LOAN SALES AND SECURITIZATIONS - Small Business Association Portfolio (Details) - Small Business Association (SBA) Loan - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Transfer of Financial Assets Accounted for as Sales [Line Items]        
Loans with servicing retained sold $ 97 $ 88 $ 161 $ 165
Pretax gains resulting from above loan sales $ 10 $ 7 $ 17 $ 13