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Accumulated Other Comprehensive Loss (Tables)
6 Months Ended
Jun. 30, 2012
Accumulated Other Comprehensive Loss [Abstract]  
Components of accumulated other comprehensive loss
                                 
    Currency
translation
adjustments
    Unrealized
loss on
derivative
financial
instruments
    Funded
status of
pension
liability
    Accumulated
Other
Comprehensive
Loss
 
    (in millions)  

Balance at December 31, 2011

  $ (17.1   $ (46.2   $ (70.7   $ (134.0

Other comprehensive income

    0.6       3.9       1.1       5.6  
   

 

 

   

 

 

   

 

 

   

 

 

 

Balance at June 30, 2012, net of tax expense (benefit) of $0.2, $(32.2), $(41.0) and $(73.0)

  $ (16.5   $ (42.3   $ (69.6   $ (128.4