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Inventories
12 Months Ended
May 31, 2013
Inventory Disclosure [Abstract]  
Inventories
Inventories.
Inventories are stated at the lower of cost or market, with cost determined under the first-in, first-out method. The Company reviews inventory on hand and writes down excess and slow-moving inventory based on an assessment of future demand and historical experience. Inventories consisted of the following:
(in millions)
May 31, 2013
 
May 31, 2012
Raw materials
$
78.8

 
$
78.3

Work-in-process
44.7

 
42.4

Finished goods
500.5

 
422.5

Inventories
$
624.0

 
$
543.2