Quarterly report pursuant to Section 13 or 15(d)

Outstanding Loans and Leases - Home Loans - Impaired Loans (Details)

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Outstanding Loans and Leases - Home Loans - Impaired Loans (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Financing Receivable, Impaired [Line Items]          
Loans and leases $ 891,315   $ 891,315   $ 928,233
Chapter Seven Bankruptcy
          
Financing Receivable, Impaired [Line Items]          
Loans and leases 2,700   2,700    
Nonperforming Financing Receivable | Chapter Seven Bankruptcy
          
Financing Receivable, Impaired [Line Items]          
Loans and leases 1,400   1,400    
Federal Housing Administration | Fully Insured Loans | Chapter Seven Bankruptcy
          
Financing Receivable, Impaired [Line Items]          
Loans and leases 1,300   1,300    
Residential Portfolio Segment
          
Financing Receivable, Impaired [Line Items]          
Real estate acquired through foreclosure 614   614   533
Residential Portfolio Segment | Residential Mortgage
          
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]          
With no recorded allowance 18,055   18,055   21,567
With an allowance recorded 10,352   10,352   13,341
Total 28,407   28,407   34,908
Impaired Financing Receivable, Recorded Investment [Abstract]          
With no recorded allowance 13,828   13,828   16,450
With an allowance recorded 10,056   10,056   12,862
Total 23,884   23,884   29,312
Related Allowance 693   693   991
Impaired Financing Receivable, Average Recorded Investment [Abstract]          
With no recorded allowance 13,981 16,984 15,181 16,563  
With an allowance recorded 10,621 14,027 11,482 14,221  
Total 24,602 31,011 26,663 30,784  
Impaired Financing Receivable, Interest Income, Accrual and Cash Basis Method [Abstract]          
With no recorded allowance 161 [1] 152 [1] 508 [1] 436 [1]  
With an allowance recorded 111 [1] 173 [1] 363 [1] 451 [1]  
Total 272 [1] 325 [1] 871 [1] 887 [1]  
Residential Portfolio Segment | Home equity
          
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]          
With no recorded allowance 3,472   3,472   3,249
With an allowance recorded 874   874   893
Total 4,346   4,346   4,142
Impaired Financing Receivable, Recorded Investment [Abstract]          
With no recorded allowance 1,564   1,564   1,385
With an allowance recorded 742   742   761
Total 2,306   2,306   2,146
Related Allowance 225   225   240
Impaired Financing Receivable, Average Recorded Investment [Abstract]          
With no recorded allowance 1,509 1,286 1,449 1,208  
With an allowance recorded 745 902 746 942  
Total 2,254 2,188 2,195 2,150  
Impaired Financing Receivable, Interest Income, Accrual and Cash Basis Method [Abstract]          
With no recorded allowance 26 [1] 19 [1] 72 [1] 55 [1]  
With an allowance recorded 5 [1] 9 [1] 19 [1] 31 [1]  
Total $ 31 [1] $ 28 [1] $ 91 [1] $ 86 [1]  
[1] Interest income recognized includes interest accrued and collected on the outstanding balances of accruing impaired loans as well as interest cash collections on nonaccruing impaired loans for which the principal is considered collectible.