Quarterly report pursuant to Section 13 or 15(d)

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

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Outstanding Loans and Leases - Impaired Loans Commercial Loans (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
U.S. Small Business Commercial
          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance $ 253 [1]   $ 253 [1]   $ 361
Carrying Value 243 [1]   243 [1]   317
Related Allowance 58 [1]   58 [1]   97
Average Carrying Value 253 [1] 437 [1] 270 [1] 455 [1]  
Interest Income Recognized 2 [1],[2] 3 [1],[2] 4 [1],[2] 7 [1],[2]  
U.S. Small Business Commercial | Financing Receivable With Related Allowance [Member]
          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 253 [1]   253 [1]   361
Carrying Value 243 [1]   243 [1]   317
Related Allowance 58 [1]   58 [1]   97
Average Carrying Value 253 [1] 437 [1] 270 [1] 455 [1]  
Interest Income Recognized 2 [1],[2] 3 [1],[2] 4 [1],[2] 7 [1],[2]  
Commercial Real Estate [Member]
          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 1,678   1,678   3,290
Carrying Value 1,206   1,206   2,164
Related Allowance 82   82   201
Average Carrying Value 1,495 3,480 1,731 3,859  
Interest Income Recognized 7 [2] 8 [2] 16 [2] 18 [2]  
Commercial Real Estate [Member] | Financing Receivable With Related Allowance [Member]
          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 1,079   1,079   2,287
Carrying Value 660   660   1,262
Related Allowance 82   82   201
Average Carrying Value 842 1,789 989 2,027  
Interest Income Recognized 4 [2] 4 [2] 9 [2] 10 [2]  
Commercial Real Estate [Member] | Financing Receivable Without Related Allowance [Member]
          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 599   599   1,003
Carrying Value 546   546   902
Average Carrying Value 653 1,691 742 1,832  
Interest Income Recognized 3 [2] 4 [2] 7 [2] 8 [2]  
Commercial Credit Card Financing Receivable [Member] | U.S. Commercial
          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 2,433   2,433   3,002
Carrying Value 2,011   2,011   2,247
Related Allowance 152   152   159
Average Carrying Value 2,089 2,891 2,131 2,915  
Interest Income Recognized 13 [2] 16 [2] 27 [2] 35 [2]  
Commercial Credit Card Financing Receivable [Member] | Non-U.S. Commercial
          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 386   386   520
Carrying Value 162   162   153
Related Allowance 36   36   18
Average Carrying Value 183 191 168 183  
Interest Income Recognized 2 [2] 1 [2] 5 [2] 1 [2]  
Commercial Credit Card Financing Receivable [Member] | Financing Receivable With Related Allowance [Member] | U.S. Commercial
          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 1,426   1,426   1,782
Carrying Value 1,057   1,057   1,138
Related Allowance 152   152   159
Average Carrying Value 1,110 1,805 1,113 1,854  
Interest Income Recognized 7 [2] 7 [2] 15 [2] 18 [2]  
Commercial Credit Card Financing Receivable [Member] | Financing Receivable With Related Allowance [Member] | Non-U.S. Commercial
          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 296   296   280
Carrying Value 72   72   33
Related Allowance 36   36   18
Average Carrying Value 70 54 47 58  
Interest Income Recognized 1 [2] 1 [2] 2 [2] 1 [2]  
Commercial Credit Card Financing Receivable [Member] | Financing Receivable Without Related Allowance [Member] | U.S. Commercial
          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 1,007   1,007   1,220
Carrying Value 954   954   1,109
Average Carrying Value 979 1,086 1,018 1,061  
Interest Income Recognized 6 [2] 9 [2] 12 [2] 17 [2]  
Commercial Credit Card Financing Receivable [Member] | Financing Receivable Without Related Allowance [Member] | Non-U.S. Commercial
          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 90   90   240
Carrying Value 90   90   120
Average Carrying Value 113 137 121 125  
Interest Income Recognized $ 1 [2]    [2] $ 3 [2]    [2]  
[1] Includes U.S. small business commercial renegotiated TDR loans and related allowance.
[2] 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.