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Inventories, net
6 Months Ended
Jun. 30, 2012
Inventories, net  
Inventories, net

6. Inventories, net

        Inventories, net consisted of the following:

 
  June 30,
2012
  December 31,
2011
 
 
  (in millions)
 

Materials and supplies

  $ 17.4   $ 13.9  

Finished goods

    2.6     3.4  
           

Total

  $ 20.0   $ 17.3