Quarterly report pursuant to Section 13 or 15(d)

Outstanding Loans and Leases - Credit Card and Other Consumer - Impaired Loans (Details)

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Outstanding Loans and Leases - Credit Card and Other Consumer - Impaired Loans (Details) - Credit card and other consumer - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Financing Receivable, Impaired [Line Items]          
Fixed payment plan period for loans modified     60 months    
Direct/Indirect Consumer          
Unpaid Principal Balance          
With no recorded allowance $ 63   $ 63   $ 58
With an allowance recorded 1   1   1
Total 64   64   59
Carrying Value          
With no recorded allowance 30   30   28
With an allowance recorded 1   1   1
Total 31   31   29
Related Allowance 0   0   0
Average Carrying Value          
With no recorded allowance 29 $ 18 29 $ 18  
With an allowance recorded 1 2 1 3  
Total 30 20 30 21  
Interest Income Recognized          
With no recorded allowance 1 0 1 0  
With an allowance recorded 0 0 0 0  
Total 1 0 1 0  
United States | Credit Card Receivable          
Unpaid Principal Balance          
With an allowance recorded 478   478   454
Total 478   478   454
Carrying Value          
With an allowance recorded 486   486   461
Total 486   486   461
Related Allowance 143   143   $ 125
Average Carrying Value          
With an allowance recorded 480 463 473 470  
Total 480 463 473 470  
Interest Income Recognized          
With an allowance recorded 6 6 12 12  
Total 6 6 12 12  
Non United States | Credit Card Receivable          
Average Carrying Value          
With an allowance recorded 0   0    
With an allowance recorded   78   88  
Total, including loans held for sale   78   88  
Total 0   0    
Interest Income Recognized          
With an allowance recorded 0   0    
With an allowance recorded, including loans held for sale   0   1  
Total, including loans held for sale   $ 0   $ 1  
Total $ 0   $ 0