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Inventories, Net
3 Months Ended
Mar. 31, 2012
Inventory, Net [Abstract]  
Inventories, Net
Inventories, Net
Inventories are stated at the lower of cost or market value. The components of net inventories were as follows (in millions):
 
March 31, 2012
 
December 31, 2011
Materials and supplies
$
148.6

 
$
130.8

Work in process
135.5

 
105.6

Finished products
574.8

 
463.5

 
$
858.9

 
$
699.9