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) (Commercial Portfolio Segment [Member], USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
Financing Receivable, Impaired [Line Items]          
Real Estate Acquired Through Foreclosure $ 433   $ 433   $ 612
Commercial Real Estate Receivable [Member]
         
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 4,115   4,115   5,916
Carrying Value 3,088   3,088   4,479
Related Allowance 106   106   135
Average Carrying Value 3,480 5,386 3,859 5,563  
Interest Income Recognized 8 [1] 3 [1] 18 [1] 6 [1]  
Small Business Commercial Receivable [Member]
         
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 449 [2]   449 [2]   531 [2]
Carrying Value 427 [2]   427 [2]   503 [2]
Related Allowance 116 [2]   116 [2]   172 [2]
Average Carrying Value 437 [2] 707 [2] 455 [2] 762 [2]  
Interest Income Recognized 3 [1],[2] 6 [1],[2] 7 [1],[2] 13 [1],[2]  
U.S. Commercial | Commercial Financing Receivable [Member]
         
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 3,742   3,742   4,136
Carrying Value 2,725   2,725   2,972
Related Allowance 188   188   232
Average Carrying Value 2,891 2,997 2,915 3,195  
Interest Income Recognized 16 [1] 3 [1] 35 [1] 4 [1]  
Non-U.S. Commercial | Commercial Financing Receivable [Member]
         
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 564   564   524
Carrying Value 209   209   159
Related Allowance 12   12   6
Average Carrying Value 191 158 183 193  
Interest Income Recognized 1 [1]   1 [1]    
Impaired Financing Receivable with No Related Allowance [Domain] | Commercial Real Estate Receivable [Member]
         
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 1,765   1,765   2,587
Carrying Value 1,531   1,531   2,095
Average Carrying Value 1,691 1,895 1,832 1,854  
Interest Income Recognized 4 [1] 1 [1] 8 [1] 2 [1]  
Impaired Financing Receivable with No Related Allowance [Domain] | U.S. Commercial | Commercial Financing Receivable [Member]
         
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 1,378   1,378   1,482
Carrying Value 1,087   1,087   985
Average Carrying Value 1,086 534 1,061 503  
Interest Income Recognized 9 [1] 1 [1] 17 [1] 1 [1]  
Impaired Financing Receivable with No Related Allowance [Domain] | Non-U.S. Commercial | Commercial Financing Receivable [Member]
         
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 148   148   216
Carrying Value 148   148   101
Average Carrying Value 137 92 125 71  
Impaired Financing Receivable with Related Allowance [Domain] | Commercial Real Estate Receivable [Member]
         
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 2,350   2,350   3,329
Carrying Value 1,557   1,557   2,384
Related Allowance 106   106   135
Average Carrying Value 1,789 3,491 2,027 3,709  
Interest Income Recognized 4 [1] 2 [1] 10 [1] 4 [1]  
Impaired Financing Receivable with Related Allowance [Domain] | Small Business Commercial Receivable [Member]
         
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 449 [2]   449 [2]   531 [2]
Carrying Value 427 [2]   427 [2]   503 [2]
Related Allowance 116 [2]   116 [2]   172 [2]
Average Carrying Value 437 [2] 707 [2] 455 [2] 762 [2]  
Interest Income Recognized 3 [1],[2] 6 [1],[2] 7 [1],[2] 13 [1],[2]  
Impaired Financing Receivable with Related Allowance [Domain] | U.S. Commercial | Commercial Financing Receivable [Member]
         
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 2,364   2,364   2,654
Carrying Value 1,638   1,638   1,987
Related Allowance 188   188   232
Average Carrying Value 1,805 2,463 1,854 2,692  
Interest Income Recognized 7 [1] 2 [1] 18 [1] 3 [1]  
Impaired Financing Receivable with Related Allowance [Domain] | Non-U.S. Commercial | Commercial Financing Receivable [Member]
         
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 416   416   308
Carrying Value 61   61   58
Related Allowance 12   12   6
Average Carrying Value 54 66 58 122  
Interest Income Recognized $ 1 [1]   $ 1 [1]    
[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.