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, USD $)
In Millions, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Financing Receivable, Modifications [Line Items]        
Unpaid Principal Balance $ 457 $ 668 $ 1,176 $ 1,496
Carrying Value 403 644 1,109 1,354
Net Charge-offs 41 27 43 32
U.S. Commercial
        
Financing Receivable, Modifications [Line Items]        
Unpaid Principal Balance 361 361 808 853
Carrying Value 317 357 759 771
Net Charge-offs 33 27 35 28
Trouble debt restructurings entered payment default that were modified during the preceding twelve months     63.0 128.0
Non United States
        
Financing Receivable, Modifications [Line Items]        
Unpaid Principal Balance 45 0 45 21
Carrying Value 45 0 45 7
Net Charge-offs            
Commercial Real Estate
        
Financing Receivable, Modifications [Line Items]        
Unpaid Principal Balance 49 305 317 615
Carrying Value 39 284 299 569
Net Charge-offs 8 0 8 3
Trouble debt restructurings entered payment default that were modified during the preceding twelve months     67.0 269.0
Small Business Commercial
        
Financing Receivable, Modifications [Line Items]        
Unpaid Principal Balance 2 [1] 2 [1] 6 [1] 7 [1]
Carrying Value 2 [1] 3 [1] 6 [1] 7 [1]
Net Charge-offs    [1]    [1]    [1] 1 [1]
Small Business Commercial | U.S. Commercial
        
Financing Receivable, Modifications [Line Items]        
Trouble debt restructurings entered payment default that were modified during the preceding twelve months     $ 0.3 $ 1.0
[1] U.S. small business commercial TDRs are comprised of renegotiated small business card loans.