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Details of Certain Consolidated Statements of Income Lines (Details 3) (USD $)
In Millions
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Component of Operating Other Cost and Expense [Line Items]        
Total other, net expense $ 575 $ 464 $ 1,142 $ 954
Occupancy and equipment [Member]
       
Component of Operating Other Cost and Expense [Line Items]        
Total other, net expense 391 379 785 763
Communications [Member]
       
Component of Operating Other Cost and Expense [Line Items]        
Total other, net expense 92 97 187 192
Mastercard and Visa settlements [Member]
       
Component of Operating Other Cost and Expense [Line Items]        
Total other, net expense (213) (213) (426) (426)
Other net expenses [Member]
       
Component of Operating Other Cost and Expense [Line Items]        
Total other, net expense $ 305 $ 201 $ 596 $ 425