Annual report pursuant to Section 13 and 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
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Financing Receivable, Modifications [Line Items]      
Threshold period past due for nonperforming status of financing receivables 90 days 90 days  
Commercial Portfolio Segment      
Financing Receivable, Modifications [Line Items]      
Unpaid Principal Balance $ 1,238 $ 1,211 $ 1,478
Carrying Value 1,158 1,177 1,388
Net Charge-offs $ 31 57 44
Threshold period past due for nonperforming status of financing receivables 90 days    
Commercial Portfolio Segment | Commercial Real Estate      
Financing Receivable, Modifications [Line Items]      
Unpaid Principal Balance $ 42 346 483
Carrying Value 42 346 425
Net Charge-offs 0 8 3
Trouble debt restructurings entered payment default that were modified during the preceding twelve months 25 211 128
Commercial Portfolio Segment | Small Business Commercial      
Financing Receivable, Modifications [Line Items]      
Unpaid Principal Balance 14 3 8
Carrying Value 11 3 9
Net Charge-offs 3 0 1
Commercial Portfolio Segment | U.S. Commercial      
Financing Receivable, Modifications [Line Items]      
Unpaid Principal Balance 853 818 926
Carrying Value 779 785 910
Net Charge-offs 28 49 33
Trouble debt restructurings entered payment default that were modified during the preceding twelve months 105 103 55
Commercial Portfolio Segment | Non United States      
Financing Receivable, Modifications [Line Items]      
Unpaid Principal Balance 329 44 61
Carrying Value 326 43 44
Net Charge-offs $ 0 $ 0 $ 7