Quarterly report pursuant to Section 13 or 15(d)

Outstanding Loans and Leases - Credit Card and Other Consumer - TDRs Entered into During the Period, Narrative (Details)

v3.10.0.1
Outstanding Loans and Leases - Credit Card and Other Consumer - TDRs Entered into During the Period, Narrative (Details) - Credit card and other consumer
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2018
USD ($)
Jun. 30, 2017
USD ($)
Jun. 30, 2018
USD ($)
payment
Jun. 30, 2017
USD ($)
Financing Receivable, Modifications [Line Items]        
Number of consecutive missed payments | payment     2  
Period for payment default after modification     12 months  
Credit Card Receivable | United States        
Financing Receivable, Modifications [Line Items]        
Percent expected to be in payment default within 12 months after modification     13.00%  
Trouble debt restructurings entered payment default that were modified during the preceding twelve months $ 8 $ 5 $ 16 $ 12
Direct/Indirect Consumer        
Financing Receivable, Modifications [Line Items]        
Percent expected to be in payment default within 12 months after modification     21.00%  
Trouble debt restructurings entered payment default that were modified during the preceding twelve months $ 2 $ 1 $ 5 $ 2