Quarterly report pursuant to Section 13 or 15(d)

Outstanding Loans and Leases - Commercial Loans TDRs (Details)

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Outstanding Loans and Leases - Commercial Loans TDRs (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
Commercial [Member]
          
Financing Receivable, Modifications [Line Items]          
Real Estate Acquired Through Foreclosure $ 129   $ 129   $ 250
Unpaid Principal Balance 774 519 1,357 1,126  
Carrying Value 729 446 1,273 980  
Net Charge-Offs 6 13 6 20  
Commercial Credit Card Financing Receivable [Member] | U.S. Commercial
          
Financing Receivable, Modifications [Line Items]          
Unpaid Principal Balance 487 220 840 558  
Carrying Value 460 162 813 496  
Net Charge-Offs 5 13 2 15  
Financing Receivable, Modifications, Payment Default, Carrying Value 104 170 104 170  
Commercial Credit Card Financing Receivable [Member] | Non-U.S. Commercial
          
Financing Receivable, Modifications [Line Items]          
Unpaid Principal Balance 74 66 74 66  
Carrying Value 73 66 73 66  
Net Charge-Offs              
Commercial Real Estate [Member]
          
Financing Receivable, Modifications [Line Items]          
Unpaid Principal Balance 210 226 438 486  
Carrying Value 193 210 381 401  
Net Charge-Offs 1 0 3 4  
Financing Receivable, Modifications, Payment Default, Carrying Value 288 335 288 335  
U.S. Small Business Commercial
          
Financing Receivable, Modifications [Line Items]          
Unpaid Principal Balance 3 [1] 7 [1] 5 [1] 16 [1]  
Carrying Value 3 [1] 8 [1] 6 [1] 17 [1]  
Net Charge-Offs    [1]    [1] 1 [1] 1 [1]  
U.S. Small Business Commercial | U.S. Commercial
          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Payment Default, Carrying Value $ 1 $ 12 $ 1 $ 12  
[1] U.S. small business commercial TDRs are comprised of renegotiated small business card loans.