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
Mar. 31, 2018
Mar. 31, 2017
Financing Receivable, Modifications [Line Items]    
Total modifications $ 519 $ 533
Modifications under government programs    
Financing Receivable, Modifications [Line Items]    
Total modifications 13 35
Modifications under proprietary programs    
Financing Receivable, Modifications [Line Items]    
Total modifications 200 52
Trial modifications    
Financing Receivable, Modifications [Line Items]    
Total modifications 242 372
Loans discharged in Chapter 7 bankruptcy    
Financing Receivable, Modifications [Line Items]    
Total modifications 64 74
Contractual interest rate reduction | Modifications under government programs    
Financing Receivable, Modifications [Line Items]    
Total modifications 7 32
Contractual interest rate reduction | Modifications under proprietary programs    
Financing Receivable, Modifications [Line Items]    
Total modifications 11 14
Capitalization of past due amounts | Modifications under proprietary programs    
Financing Receivable, Modifications [Line Items]    
Total modifications 14 5
Principal and/or interest forbearance | Modifications under government programs    
Financing Receivable, Modifications [Line Items]    
Total modifications 0 1
Principal and/or interest forbearance | Modifications under proprietary programs    
Financing Receivable, Modifications [Line Items]    
Total modifications 6 3
Other modifications | Modifications under government programs    
Financing Receivable, Modifications [Line Items]    
Total modifications 6 2
Other modifications | Modifications under proprietary programs    
Financing Receivable, Modifications [Line Items]    
Total modifications 169 $ 30
Hurricane-Related Modifications | Modifications under government programs    
Financing Receivable, Modifications [Line Items]    
Total modifications $ 168