Quarterly report pursuant to Section 13 or 15(d)

Outstanding Loans and Leases - Commercial Loans TDRs (Details)

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Outstanding Loans and Leases - Commercial Loans TDRs (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Financing Receivable, Modifications [Line Items]          
Threshold period past due for nonperforming status of financing receivables     90 days   90 days
Commercial          
Financing Receivable, Modifications [Line Items]          
Unpaid Principal Balance $ 1,007 $ 666 $ 1,658 $ 891  
Carrying Value 964 647 1,533 871  
Net Charge-offs 38 3 $ 80 6  
Threshold period past due for nonperforming status of financing receivables     90 days    
Commercial | Commercial Real Estate          
Financing Receivable, Modifications [Line Items]          
Unpaid Principal Balance 12 4 $ 22 28  
Carrying Value 12 4 22 28  
Net Charge-offs 0 0 1 0  
Trouble debt restructurings entered payment default that were modified during the preceding twelve months     17 28  
Commercial | Commercial Lease Financing          
Financing Receivable, Modifications [Line Items]          
Unpaid Principal Balance 5   5    
Carrying Value 2   2    
Net Charge-offs 2   2    
Commercial | Small Business Commercial          
Financing Receivable, Modifications [Line Items]          
Unpaid Principal Balance 2 1 3 3  
Carrying Value 2 1 3 4  
Net Charge-offs 0 0 0 0  
United States | Commercial          
Financing Receivable, Modifications [Line Items]          
Unpaid Principal Balance 873 602 1,341 794  
Carrying Value 849 583 1,299 773  
Net Charge-offs 24 3 29 6  
Trouble debt restructurings entered payment default that were modified during the preceding twelve months     90 132  
Non United States | Commercial          
Financing Receivable, Modifications [Line Items]          
Unpaid Principal Balance 115 59 287 66  
Carrying Value 99 59 207 66  
Net Charge-offs $ 12 $ 0 $ 48 $ 0