Quarterly report pursuant to Section 13 or 15(d)

LOAN SALES AND SECURITIZATIONS - Small Business Association Portfolio, MSRs Amortization Method (Details)

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LOAN SALES AND SECURITIZATIONS - Small Business Association Portfolio, MSRs Amortization Method (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Servicing Asset at Amortized Cost, Balance [Roll Forward]      
Fair value, end of period $ 246   $ 238
Small Business Association (SBA) Loan      
Servicing Asset at Amortized Cost, Balance [Roll Forward]      
Carrying value, beginning of period 27 $ 21  
New servicing assets created 3 1  
Amortization and other (2) (1)  
Carrying value, end of period 28 21  
Fair value, end of period $ 32 $ 26  
Weighted-average life (years) 3 years 3 months 3 years 4 months