Annual report pursuant to Section 13 and 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 ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
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 $ 1,512 $ 1,206 $ 1,895
Carrying Value $ 1,454 1,081 1,817
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 $ 115 35 77
Carrying Value 115 24 77
Troubled debt restructurings entering payment default that were modified during the preceding twelve months 3 19 34
Commercial Portfolio Segment | Commercial lease financing      
Financing Receivable, Modifications [Line Items]      
Unpaid Principal Balance 68 20 6
Carrying Value 68 17 4
Commercial Portfolio Segment | Small Business Commercial      
Financing Receivable, Modifications [Line Items]      
Unpaid Principal Balance 9 13 1
Carrying Value 8 13 1
Commercial Portfolio Segment | United States      
Financing Receivable, Modifications [Line Items]      
Unpaid Principal Balance 1,154 1,033 1,556
Carrying Value 1,098 922 1,482
Troubled debt restructurings entering payment default that were modified during the preceding twelve months 150 64 140
Commercial Portfolio Segment | Non United States      
Financing Receivable, Modifications [Line Items]      
Unpaid Principal Balance 166 105 255
Carrying Value $ 165 $ 105 $ 253