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Inventories
6 Months Ended
Jun. 30, 2013
Inventory Disclosure [Abstract]  
Inventories
Inventories
 
Inventories are valued at the lower of cost, as generally 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,
2013
 
December 31,
2012
Raw materials and supplies
 
$
214.7

 
$
210.7

Work in process and finished goods
 
454.8

 
451.2

Total inventories
 
$
669.5

 
$
661.9