XML 90 R77.htm IDEA: XBRL DOCUMENT v3.8.0.1
Loans - Schedule of Additional Information on Nonaccrual Loans (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Receivables [Abstract]      
Interest income that would have been recorded if the nonaccrual receivable had been current in accordance with contractual terms during the period $ 68 $ 91 $ 85
Interest income that was recorded on nonaccrual loans and included in interest income during the period $ 24 $ 22 $ 22