Inventories (Tables)
 9 Months Ended
Feb. 28, 2014
Inventory Disclosure [Abstract]  
Components of Inventories
Inventories consisted of the following:
 
(in millions)
February 28, 2014
 
May 31, 2013
Raw materials
$
79.0

 
$
78.8

Work-in-process
57.4

 
44.7

Finished goods
548.0

 
500.5

Inventories
$
684.4

 
$
624.0