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Inventories, net
12 Months Ended
Dec. 31, 2011
Inventories, net  
Inventories, net

6.     Inventories, net

        Inventories, net consist of the following:

 
  December 31,  
 
  2011   2010  
 
  (in millions)
 

Materials and supplies

  $ 18.6   $ 15.2  

Finished goods

    3.4     12.4  
           

Total

  $ 22.0   $ 27.6