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Inventories
3 Months Ended
Mar. 31, 2015
Inventory Disclosure [Abstract]  
Inventories
Inventories
Inventories consist of the following:
 
March 31,
2015
 
December 31,
2014
 
(in millions)
Finished goods
$
244.6

 
$
179.5

Raw materials, spare parts and supplies
23.1

 
23.4

 
$
267.7

 
$
202.9