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Other (Expense) Income, Net (Tables)
 6 Months Ended
Jun. 30, 2011
Other (Expense) Income, Net [Abstract]  
Other income
                                 
    Quarter Ended     Six Months Ended  
    June 30,     June 30,  
    2011     2010     2011     2010  
Interest income
  $ 0.1     $ —     $ 0.2     $ —  
Unrealized loss on financial derivatives1
    (3.6 )     0.9       (1.9 )     0.9  
All other, net
    0.1       (0.2 )     —       —  
 
                       
 
  $ (3.4 )   $ 0.7     $ (1.7 )   $ 0.9