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Federal Funds Sold, Securities Purchased under Resale Agreements and Other Short-Term Investments (Tables)
12 Months Ended
Dec. 31, 2012
Federal Funds Sold, Securities Purchased under Resale Agreements and Other Short-Term Investments [Abstract]  
Federal Funds Sold, Securities Purchased under Resale Agreements and Other Short-Term Investments
      
  December 31,
(in millions)  2012  2011
Federal funds sold and securities    
 purchased under resale agreements$ 33,884  24,255
Interest-earning deposits  102,408  18,917
Other short-term investments  1,021  1,195
 Total$ 137,313  44,367