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
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Financing Receivable, Impaired [Line Items]      
Loans and leases $ 945,615   $ 946,895
Consumer real estate      
Financing Receivable, Impaired [Line Items]      
Real estate acquired through foreclosure 236   244
Loans with formal foreclosure proceeding in process 2,200    
Reclassified consumer real estate loans 164 $ 168  
Consumer real estate | Residential Mortgage      
Unpaid Principal Balance      
With no recorded allowance 5,087   5,396
With an allowance recorded 1,777   1,977
Total 6,864   7,373
Carrying Value      
With no recorded allowance 4,033   4,268
With an allowance recorded 1,739   1,929
Total 5,772   6,197
Related Allowance 95   114
Average Carrying Value      
With no recorded allowance 4,171 6,462  
With an allowance recorded 1,848 2,705  
Total 6,019 9,167  
Interest Income Recognized      
With no recorded allowance 45 65  
With an allowance recorded 18 25  
Total 63 90  
Consumer real estate | Home equity lines of credit      
Unpaid Principal Balance      
With no recorded allowance 2,892   2,948
With an allowance recorded 750   812
Total 3,642   3,760
Carrying Value      
With no recorded allowance 1,582   1,599
With an allowance recorded 704   760
Total 2,286   2,359
Related Allowance 114   $ 144
Average Carrying Value      
With no recorded allowance 1,593 1,961  
With an allowance recorded 737 892  
Total 2,330 2,853  
Interest Income Recognized      
With no recorded allowance 25 27  
With an allowance recorded 6 6  
Total 31 $ 33  
Consumer real estate | Chapter Seven Bankruptcy      
Financing Receivable, Impaired [Line Items]      
Loans and leases 813    
Consumer real estate | Chapter Seven Bankruptcy | Nonperforming Financing Receivable      
Financing Receivable, Impaired [Line Items]      
Loans and leases 173    
Consumer real estate | Chapter Seven Bankruptcy | Fully Insured Loans | Federal Housing Administration      
Financing Receivable, Impaired [Line Items]      
Loans and leases $ 326