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)

v3.8.0.1
Outstanding Loans and Leases - Credit Card and Other Consumer - TDRs Entered into During the Period, Narrative (Details)
$ in Millions
3 Months Ended
Mar. 31, 2018
USD ($)
payment
Mar. 31, 2017
USD ($)
Financing Receivable, Modifications [Line Items]    
Number of consecutive missed payments | payment 2  
Credit card and other consumer    
Financing Receivable, Modifications [Line Items]    
Period for payment default after modification 12 months  
Credit card and other consumer | 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 $ 7
Credit card and other consumer | Credit Card Receivable | Non United States    
Financing Receivable, Modifications [Line Items]    
Trouble debt restructurings entered payment default that were modified during the preceding twelve months $ 0 32
Credit card and other consumer | Direct/Indirect Consumer    
Financing Receivable, Modifications [Line Items]    
Percent expected to be in payment default within 12 months after modification 18.00%  
Trouble debt restructurings entered payment default that were modified during the preceding twelve months $ 3 $ 1