Quarterly report pursuant to Section 13 or 15(d)

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

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Outstanding Loans and Leases - Consumer Real Estate - Modification Programs (Details) - Consumer real estate - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Financing Receivable, Modifications [Line Items]        
Total modifications $ 152 $ 285 $ 395 $ 991
Modifications under government programs        
Financing Receivable, Modifications [Line Items]        
Total modifications 8 12 32 48
Modifications under proprietary programs        
Financing Receivable, Modifications [Line Items]        
Total modifications 18 33 125 446
Loans discharged in Chapter 7 bankruptcy        
Financing Receivable, Modifications [Line Items]        
Total modifications 16 39 54 121
Trial modifications        
Financing Receivable, Modifications [Line Items]        
Total modifications $ 110 $ 201 $ 184 376
Hurricane-Related Modifications | Modifications under government programs        
Financing Receivable, Modifications [Line Items]        
Total modifications       $ 197