Quarterly report pursuant to Section 13 or 15(d)

Outstanding Loans and Leases - Consumer Real Estate - TDRs Entering Payment Default That Were Modified During the Preceding 12 Months (Details)

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Outstanding Loans and Leases - Consumer Real Estate - TDRs Entering Payment Default That Were Modified During the Preceding 12 Months (Details) - Consumer real estate
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2017
USD ($)
payment
Jun. 30, 2016
USD ($)
Residential Mortgage        
Financing Receivable, Modifications [Line Items]        
Number of missing payments causing default | payment     3  
Trouble debt restructurings entered payment default that were modified during the preceding twelve months $ 85 $ 335 $ 379 $ 748
Residential Mortgage | Modifications under government programs        
Financing Receivable, Modifications [Line Items]        
Trouble debt restructurings entered payment default that were modified during the preceding twelve months 19 85 44 178
Residential Mortgage | Modifications under proprietary programs        
Financing Receivable, Modifications [Line Items]        
Trouble debt restructurings entered payment default that were modified during the preceding twelve months 14 35 30 78
Residential Mortgage | Loans discharged in Chapter 7 bankruptcy        
Financing Receivable, Modifications [Line Items]        
Trouble debt restructurings entered payment default that were modified during the preceding twelve months 12 31 70 71
Residential Mortgage | Trial modifications        
Financing Receivable, Modifications [Line Items]        
Trouble debt restructurings entered payment default that were modified during the preceding twelve months 40 184 235 421
Home equity lines of credit        
Financing Receivable, Modifications [Line Items]        
Trouble debt restructurings entered payment default that were modified during the preceding twelve months 29 41 69 105
Home equity lines of credit | Modifications under government programs        
Financing Receivable, Modifications [Line Items]        
Trouble debt restructurings entered payment default that were modified during the preceding twelve months 1 1 2 1
Home equity lines of credit | Modifications under proprietary programs        
Financing Receivable, Modifications [Line Items]        
Trouble debt restructurings entered payment default that were modified during the preceding twelve months 19 5 37 27
Home equity lines of credit | Loans discharged in Chapter 7 bankruptcy        
Financing Receivable, Modifications [Line Items]        
Trouble debt restructurings entered payment default that were modified during the preceding twelve months 3 6 7 11
Home equity lines of credit | Trial modifications        
Financing Receivable, Modifications [Line Items]        
Trouble debt restructurings entered payment default that were modified during the preceding twelve months $ 6 $ 29 $ 23 $ 66