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Inventories
6 Months Ended
Jun. 30, 2014
Inventory Disclosure [Abstract]  
Inventories
Inventories
 
Inventories are valued at the lower of cost, as determined by the first-in, first-out (FIFO) method, or market.  Inventory values using the FIFO method of accounting approximate replacement cost.  Inventories are summarized as follows:
 
(in millions)
 
June 30,
2014
 
December 31,
2013
Raw materials and supplies
 
$
224.9

 
$
215.6

Work in process and finished goods
 
459.2

 
432.9

Total inventories
 
$
684.1

 
$
648.5