Quarterly report pursuant to Section 13 or 15(d)

Outstanding Loans and Leases - Consumer Real Estate - Modification Programs (Details)

v3.8.0.1
Outstanding Loans and Leases - Consumer Real Estate - Modification Programs (Details) - Consumer real estate - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Financing Receivable, Modifications [Line Items]        
Carrying value $ 435 $ 668 $ 1,148 $ 1,494
Modifications under government programs        
Financing Receivable, Modifications [Line Items]        
Carrying value 18 23 82 153
Modifications under proprietary programs        
Financing Receivable, Modifications [Line Items]        
Carrying value 30 71 298 289
Trial modifications        
Financing Receivable, Modifications [Line Items]        
Carrying value 329 490 605 853
Loans discharged in Chapter 7 bankruptcy        
Financing Receivable, Modifications [Line Items]        
Carrying value 58 84 163 199
Contractual interest rate reduction | Modifications under government programs        
Financing Receivable, Modifications [Line Items]        
Carrying value 10 18 56 121
Contractual interest rate reduction | Modifications under proprietary programs        
Financing Receivable, Modifications [Line Items]        
Carrying value 15 20 178 143
Capitalization of past due amounts | Modifications under proprietary programs        
Financing Receivable, Modifications [Line Items]        
Carrying value 12 4 47 27
Principal and/or interest forbearance | Modifications under government programs        
Financing Receivable, Modifications [Line Items]        
Carrying value 1 2 4 11
Principal and/or interest forbearance | Modifications under proprietary programs        
Financing Receivable, Modifications [Line Items]        
Carrying value 2 2 28 47
Other modifications | Modifications under government programs        
Financing Receivable, Modifications [Line Items]        
Carrying value 7 3 22 21
Other modifications | Modifications under proprietary programs        
Financing Receivable, Modifications [Line Items]        
Carrying value $ 1 $ 45 $ 45 $ 72