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Property, Plant and Equipment (Tables)
12 Months Ended
Dec. 31, 2011
Property, Plant and Equipment  
Schedule of Property, plant and equipment

 

 
  December 31,  
 
  2011   2010  
 
  (in millions)
 

Land

  $ 15.6   $ 13.3  

Buildings and improvements

    153.7     132.1  

Machinery and equipment

    318.0     297.8  

Construction in progress

    7.5     7.3  
           

 

    494.8     450.5  

Accumulated depreciation

    (268.1 )   (253.0 )
           

 

  $ 226.7   $ 197.5