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Financial Instruments and Hedging Activities, Concentrations of Credit Risk and Fair Value of Financial Instruments (Tables)
9 Months Ended
Sep. 30, 2011
Financial Instruments and Hedging Activities, Concentrations of Credit Risk and Fair Value of Financial Instruments [Abstract] 
Assets and liabilities measured at fair value
                                 
    September 30, 2011     December 31, 2010  
    Assets     Liabilities     Assets     Liabilities  
    (in millions)  
Short-term currency forward exchange contracts
  $ 17.4     $ (23.2 )   $ 23.9     $ (24.7 )
Long-term currency forward exchange contracts
    59.5       (24.4 )     63.3       (26.4 )
Short-term commodity swaps
    —       (3.3 )     2.9       —  
Long-term cross-currency swaps
    —       (35.2 )     —       (30.2 )
U. S. dollar equivalent contractual amount of forward exchange contracts
                 
    September 30,     December 31,  
    2011     2010  
    (in millions)  
U.S. Dollar
  $ 579.4     $ 894.8  
Euro
    411.7       335.4  
British Pound Sterling
    153.2       143.9  
Canadian Dollar
    —       370.6  
Other
    23.9       32.3  
 
           
 
  $ 1,168.2     $ 1,777.0