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, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Financing Receivable, Impaired [Line Items]          
Loans and leases $ 886,449   $ 886,449   $ 881,391
Chapter Seven Bankruptcy          
Financing Receivable, Impaired [Line Items]          
Loans and leases 2,200   2,200    
Nonperforming Financing Receivable | Chapter Seven Bankruptcy          
Financing Receivable, Impaired [Line Items]          
Loans and leases 980   980    
Federal Housing Administration | Fully Insured Loans | Chapter Seven Bankruptcy          
Financing Receivable, Impaired [Line Items]          
Loans and leases 915   $ 915    
Consumer Real Estate          
Financing Receivable, Impaired [Line Items]          
Minimum period for modified payments under trial modification     3 months    
Maximum period for modified payments under trial modification     4 months    
Real estate acquired through foreclosure 553   $ 553   630
Loans with formal foreclosure proceeding in process 6,700   6,700    
Consumer Real Estate | Residential Mortgage          
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]          
With no recorded allowance 17,058   17,058   19,710
With an allowance recorded 8,096   8,096   7,861
Total 25,154   25,154   27,571
Impaired Financing Receivable, Recorded Investment [Abstract]          
With no recorded allowance 13,577   13,577   15,605
With an allowance recorded 7,923   7,923   7,665
Total 21,500   21,500   23,270
Related Allowance 477   477   531
Impaired Financing Receivable, Average Recorded Investment [Abstract]          
With no recorded allowance 14,401 $ 15,202 14,897 $ 15,781  
With an allowance recorded 7,706 11,493 7,646 11,913  
Total 22,107 26,695 22,543 27,694  
Impaired Financing Receivable, Interest Income, Accrual and Cash Basis Method [Abstract]          
With no recorded allowance 105 125 213 285  
With an allowance recorded 61 118 125 249  
Total 166 243 $ 338 534  
Consumer Real Estate | Home equity          
Financing Receivable, Impaired [Line Items]          
Threshold period past due for write-off of financing receivable     180 days    
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]          
With no recorded allowance 3,597   $ 3,597   3,540
With an allowance recorded 963   963   852
Total 4,560   4,560   4,392
Impaired Financing Receivable, Recorded Investment [Abstract]          
With no recorded allowance 1,752   1,752   1,630
With an allowance recorded 831   831   728
Total 2,583   2,583   2,358
Related Allowance 197   197   $ 196
Impaired Financing Receivable, Average Recorded Investment [Abstract]          
With no recorded allowance 1,805 1,436 1,748 1,419  
With an allowance recorded 744 744 729 747  
Total 2,549 2,180 2,477 2,166  
Impaired Financing Receivable, Interest Income, Accrual and Cash Basis Method [Abstract]          
With no recorded allowance 20 20 45 42  
With an allowance recorded 5 5 12 13  
Total $ 25 $ 25 $ 57 $ 55