Quarterly report pursuant to Section 13 or 15(d)

Outstanding Loans and Leases - Commercial - TDRs Entered Into During the Period (Details)

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Outstanding Loans and Leases - Commercial - TDRs Entered Into During the Period (Details) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
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 $ 954,000,000 $ 485,000,000
Carrying Value 885,000,000 451,000,000
Net charge-offs $ 17,000,000 41,000,000
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   15,000,000
Carrying Value   9,000,000
Trouble debt restructurings entered payment default that were modified during the preceding twelve months $ 18,000,000 33,000,000
Commercial Portfolio Segment | Commercial lease financing    
Financing Receivable, Modifications [Line Items]    
Unpaid Principal Balance 2,000,000  
Carrying Value 1,000,000  
Trouble debt restructurings entered payment default that were modified during the preceding twelve months 4,000,000 0
Commercial Portfolio Segment | Small Business Commercial    
Financing Receivable, Modifications [Line Items]    
Unpaid Principal Balance 3,000,000 2,000,000
Carrying Value 3,000,000 2,000,000
Commercial Portfolio Segment | United States    
Financing Receivable, Modifications [Line Items]    
Unpaid Principal Balance 618,000,000 468,000,000
Carrying Value 550,000,000 440,000,000
Trouble debt restructurings entered payment default that were modified during the preceding twelve months 139,000,000 $ 111,000,000
Commercial Portfolio Segment | Non United States    
Financing Receivable, Modifications [Line Items]    
Unpaid Principal Balance 331,000,000  
Carrying Value $ 331,000,000