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Goodwill (Tables)
12 Months Ended
Dec. 31, 2011
Goodwill  
Schedule of changes in the carrying amount of goodwill

 

 

 
  (in millions)  

Balance at December 31, 2008

  $ 1,065.5  

Purchase price allocation adjustments

    10.0  

Effect of foreign currency translation

    5.8  
       

Balance at December 31, 2009

    1,081.3  

Acquisitions

    26.2  

Consolidation of a joint venture entity

    0.2  

Effect of foreign currency translation

    1.9  
       

Balance at December 31, 2010

    1,109.6  

Acquisition

    138.5  

Purchase price allocation adjustments

    0.2  

Effect of foreign currency translation

    (4.0 )
       

Balance at December 31, 2011

  $ 1,244.3