Quarterly report pursuant to Section 13 or 15(d)

Outstanding Loans and Leases - Consumer Real Estate - Impaired Loans (Details)

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Outstanding Loans and Leases - Consumer Real Estate - Impaired Loans (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Financing Receivable, Impaired [Line Items]          
Loans and leases $ 963,800   $ 963,800   $ 946,895
Consumer real estate          
Financing Receivable, Impaired [Line Items]          
Real estate acquired through foreclosure 205   205   244
Loans with formal foreclosure proceeding in process 2,000   2,000    
Reclassified consumer real estate loans 135   299    
Consumer real estate | Residential Mortgage          
Unpaid Principal Balance          
With no recorded allowance 4,917   4,917   5,396
With an allowance recorded 1,637   1,637   1,977
Total 6,554   6,554   7,373
Carrying Value          
With no recorded allowance 3,884   3,884   4,268
With an allowance recorded 1,605   1,605   1,929
Total 5,489   5,489   6,197
Related Allowance 83   83   114
Average Carrying Value          
With no recorded allowance 3,949 $ 5,362 4,064 $ 5,978  
With an allowance recorded 1,678 2,482 1,766 2,597  
Total 5,627 7,844 5,830 8,575  
Interest Income Recognized          
With no recorded allowance 40 50 85 115  
With an allowance recorded 16 24 34 49  
Total 56 74 119 164  
Consumer real estate | Home equity lines of credit          
Unpaid Principal Balance          
With no recorded allowance 2,111   2,111   2,948
With an allowance recorded 650   650   812
Total 2,761   2,761   3,760
Carrying Value          
With no recorded allowance 1,146   1,146   1,599
With an allowance recorded 617   617   760
Total 1,763   1,763   2,359
Related Allowance 93   93   $ 144
Average Carrying Value          
With no recorded allowance 1,468 1,944 1,523 1,953  
With an allowance recorded 676 891 707 889  
Total 2,144 2,835 2,230 2,842  
Interest Income Recognized          
With no recorded allowance 23 25 48 52  
With an allowance recorded 6 6 12 12  
Total 29 $ 31 60 $ 64  
Consumer real estate | Chapter Seven Bankruptcy          
Financing Receivable, Impaired [Line Items]          
Loans and leases 758   758    
Consumer real estate | Chapter Seven Bankruptcy | Nonperforming Financing Receivable          
Financing Receivable, Impaired [Line Items]          
Loans and leases 153   153    
Consumer real estate | Chapter Seven Bankruptcy | Fully Insured Loans | Federal Housing Administration          
Financing Receivable, Impaired [Line Items]          
Loans and leases $ 310   $ 310