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, 2017
Mar. 31, 2016
Dec. 31, 2016
Financing Receivable, Impaired [Line Items]      
Loans and leases $ 906,242   $ 906,683
Consumer real estate      
Financing Receivable, Impaired [Line Items]      
Real estate acquired through foreclosure 328   363
Loans with formal foreclosure proceeding in process 4,300    
Reclassified consumer real estate loans 200 $ 416  
Consumer real estate | Residential Mortgage      
Unpaid Principal Balance      
With no recorded allowance 10,367   11,151
With an allowance recorded 3,975   4,041
Total 14,342   15,192
Carrying Value      
With no recorded allowance 8,024   8,695
With an allowance recorded 3,856   3,936
Total 11,880   12,631
Related Allowance 241   219
Average Carrying Value      
With no recorded allowance 8,456 11,418  
With an allowance recorded 3,832 6,072  
Total 12,288 17,490  
Interest Income Recognized      
With no recorded allowance 79 94  
With an allowance recorded 35 51  
Total 114 145  
Consumer real estate | Home equity lines of credit      
Unpaid Principal Balance      
With no recorded allowance 3,701   3,704
With an allowance recorded 971   910
Total 4,672   4,614
Carrying Value      
With no recorded allowance 1,962   1,953
With an allowance recorded 880   824
Total 2,842   2,777
Related Allowance 169   $ 137
Average Carrying Value      
With no recorded allowance 1,991 1,808  
With an allowance recorded 825 898  
Total 2,816 2,706  
Interest Income Recognized      
With no recorded allowance 27 13  
With an allowance recorded 5 6  
Total 32 $ 19  
Consumer real estate | Chapter Seven Bankruptcy | Home equity lines of credit      
Financing Receivable, Impaired [Line Items]      
Loans and leases 1,400    
Consumer real estate | Nonperforming Financing Receivable | Chapter Seven Bankruptcy      
Financing Receivable, Impaired [Line Items]      
Loans and leases 517    
Consumer real estate | Federal Housing Administration | Fully Insured Loans | Chapter Seven Bankruptcy | Home equity lines of credit      
Financing Receivable, Impaired [Line Items]      
Loans and leases $ 501