Annual report pursuant to Section 13 and 15(d)

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

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Outstanding Loans and Leases - Credit Card and Other Consumer (Details) - Credit card and other consumer - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Financing Receivable, Impaired [Line Items]      
Fixed payment plan period for loans modified 60 months    
Direct/Indirect Consumer      
Unpaid Principal Balance      
With no recorded allowance $ 58 $ 49  
With an allowance recorded 1 3  
Total 59 52  
Carrying Value      
With no recorded allowance 28 22  
With an allowance recorded 1 3  
Total 29 25  
Related Allowance 0 0  
Average Carrying Value      
With no recorded allowance 21 20 $ 22
With an allowance recorded 2 10 51
Total 23 30 73
Interest Income Recognized      
With no recorded allowance 2 0 0
With an allowance recorded 0 1 3
Total 2 1 3
United States | Credit Card Receivable      
Unpaid Principal Balance      
With an allowance recorded 454 479  
Total 454 479  
Carrying Value      
With an allowance recorded 461 485  
Total 461 485  
Related Allowance 125 128  
Average Carrying Value      
With an allowance recorded 464 556 749
Total 464 556 749
Interest Income Recognized      
With an allowance recorded 25 31 43
Total 25 31 43
Non United States | Credit Card Receivable      
Unpaid Principal Balance      
With an allowance recorded, including loans held for sale   88  
Total, including loans held for sale   88  
Carrying Value      
With an allowance recorded, including loans held for sale   100  
Total, including loans held for sale   100  
Related allowance, including loans held for sale   61  
Average Carrying Value      
With an allowance recorded     145
With an allowance recorded, including loans held for sale 47 111  
Total, including loans held for sale 47 111  
Total     145
Interest Income Recognized      
With an allowance recorded     4
With an allowance recorded, including loans held for sale 1 3  
Total, including loans held for sale $ 1 $ 3  
Total     $ 4