Quarterly report pursuant to Section 13 or 15(d)

LOAN SALES AND SECURITIZATIONS - Automobile Loans, MSRs Amortization Method (Details)

v3.10.0.1
LOAN SALES AND SECURITIZATIONS - Automobile Loans, MSRs Amortization Method (Details) - USD ($)
$ in Millions
Sep. 30, 2018
Dec. 31, 2017
Servicing Asset at Amortized Cost, Balance [Roll Forward]    
Fair value, end of period $ 251 $ 238