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Inventories
9 Months Ended
Feb. 28, 2015
Inventories [Abstract]  
Inventory Disclosure
INVENTORIES, NET
(In millions)
February 28, 2015
 
May 31, 2014
Finished goods
$
104.8

 
$
58.2

Raw materials
23.7

 
20.2

Total
$
128.5

 
$
78.4



Inventories are valued at the lower of cost or market and include material, labor, and overhead. The inventories of the majority of domestic manufacturing subsidiaries are valued using the last-in, first-out method ("LIFO"). The inventories of all other subsidiaries are valued using the first-in, first-out method ("FIFO")