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) (Commercial Portfolio Segment [Member], USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Financing Receivable, Modifications [Line Items]    
Unpaid Principal Balance $ 705 $ 1,091
Carrying Value 606 976
Net Charge-Offs 4 44
Commercial Financing Receivable [Member] | U.S. Commercial
    
Financing Receivable, Modifications [Line Items]    
Unpaid Principal Balance 356 461
Carrying Value 344 425
Net Charge-Offs    10
Financing Receivable, Modifications, Payment Default, Carrying Value 173 51
Commercial Financing Receivable [Member] | Non-U.S. Commercial
    
Financing Receivable, Modifications [Line Items]    
Unpaid Principal Balance    11
Carrying Value    11
Commercial Real Estate Receivable [Member]
    
Financing Receivable, Modifications [Line Items]    
Unpaid Principal Balance 339 597
Carrying Value 252 512
Net Charge-Offs 4 34
Financing Receivable, Modifications, Payment Default, Carrying Value 457 286
Small Business Commercial Receivable [Member]
    
Financing Receivable, Modifications [Line Items]    
Unpaid Principal Balance 10 [1] 22 [1]
Carrying Value 10 [1] 28 [1]
Net Charge-Offs    [1]    [1]
Small Business Commercial Receivable [Member] | U.S. Commercial
    
Financing Receivable, Modifications [Line Items]    
Financing Receivable, Modifications, Payment Default, Carrying Value $ 8 $ 22
[1] U.S. small business commercial TDRs are comprised of renegotiated small business card loans.