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Property, Plant and Equipment (Tables)
12 Months Ended
Dec. 31, 2012
Property, Plant and Equipment [Abstract]  
Summary of property, plant and equipment
                 

(in millions)

  2012     2011  

Land

  $ 7.2     $ 7.1  

Buildings

    6.5       5.1  

Equipment

    129.0       113.3  

Work in progress

    3.5       8.2  
   

 

 

   

 

 

 
      146.2       133.7  

Less accumulated depreciation

    (96.4     (87.8
   

 

 

   

 

 

 
    $ 49.8     $ 45.9