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 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Commercial [Member]
          
Financing Receivable, Impaired [Line Items]          
Real Estate Acquired Through Foreclosure $ 116   $ 116   $ 250
U.S. Small Business Commercial
          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 224 [1]   224 [1]   361
Carrying Value 213 [1]   213 [1]   317
Related Allowance 45 [1]   45 [1]   97
Average Carrying Value 218 [1] 392 [1] 253 [1] 433 [1]  
Interest Income Recognized 1 [1],[2] 3 [1],[2] 5 [1],[2] 10 [1],[2]  
U.S. Small Business Commercial | Financing Receivable With Related Allowance [Member]
          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 224 [1]   224 [1]   361
Carrying Value 213 [1]   213 [1]   317
Related Allowance 45 [1]   45 [1]   97
Average Carrying Value 218 [1] 392 [1] 253 [1] 433 [1]  
Interest Income Recognized 1 [1],[2] 3 [1],[2] 5 [1],[2] 10 [1],[2]  
Commercial Real Estate [Member]
          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 1,624   1,624   3,290
Carrying Value 1,205   1,205   2,164
Related Allowance 74   74   201
Average Carrying Value 1,186 2,870 1,550 3,526  
Interest Income Recognized 8 [2] 7 [2] 24 [2] 25 [2]  
Commercial Real Estate [Member] | Financing Receivable With Related Allowance [Member]
          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 1,099   1,099   2,287
Carrying Value 702   702   1,262
Related Allowance 74   74   201
Average Carrying Value 661 1,552 880 1,865  
Interest Income Recognized 5 [2] 3 [2] 14 [2] 13 [2]  
Commercial Real Estate [Member] | Financing Receivable Without Related Allowance [Member]
          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 525   525   1,003
Carrying Value 503   503   902
Average Carrying Value 525 1,318 670 1,661  
Interest Income Recognized 3 [2] 4 [2] 10 [2] 12 [2]  
Commercial Credit Card Financing Receivable [Member] | U.S. Commercial
          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 2,328   2,328   3,002
Carrying Value 1,841   1,841   2,247
Related Allowance 150   150   159
Average Carrying Value 1,885 2,570 2,049 2,805  
Interest Income Recognized 12 [2] 16 [2] 39 [2] 51 [2]  
Commercial Credit Card Financing Receivable [Member] | Non-U.S. Commercial
          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 286   286   520
Carrying Value 97   97   153
Related Allowance 17   17   18
Average Carrying Value 133 190 157 186  
Interest Income Recognized   2 [2] 5 [2] 3 [2]  
Commercial Credit Card Financing Receivable [Member] | Financing Receivable With Related Allowance [Member] | U.S. Commercial
          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 1,292   1,292   1,782
Carrying Value 881   881   1,138
Related Allowance 150   150   159
Average Carrying Value 928 1,457 1,051 1,727  
Interest Income Recognized 5 [2] 7 [2] 20 [2] 25 [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 235   235   280
Carrying Value 57   57   33
Related Allowance 17   17   18
Average Carrying Value 68 50 55 56  
Interest Income Recognized   1 [2] 2 [2] 2 [2]  
Commercial Credit Card Financing Receivable [Member] | Financing Receivable Without Related Allowance [Member] | U.S. Commercial
          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 1,036   1,036   1,220
Carrying Value 960   960   1,109
Average Carrying Value 957 1,113 998 1,078  
Interest Income Recognized 7 [2] 9 [2] 19 [2] 26 [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 51   51   240
Carrying Value 40   40   120
Average Carrying Value 65 140 102 130  
Interest Income Recognized   $ 1 [2] $ 3 [2] $ 1 [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.