Goodwill and Other Intangible Assets - Weighted Average Useful Life of Intangible Assets (Detail)
9 Months Ended
Feb. 28, 2014
Core technology [Member]
 
Goodwill And Other Intangible Assets [Line Items]  
Weighted Average Useful Life 15 years
Completed technology [Member]
 
Goodwill And Other Intangible Assets [Line Items]  
Weighted Average Useful Life 9 years
Product trade names [Member]
 
Goodwill And Other Intangible Assets [Line Items]  
Weighted Average Useful Life 13 years
Customer relationships [Member]
 
Goodwill And Other Intangible Assets [Line Items]  
Weighted Average Useful Life 14 years
Non-compete contracts [Member]
 
Goodwill And Other Intangible Assets [Line Items]  
Weighted Average Useful Life 1 year
Corporate trade names [Member]
 
Goodwill And Other Intangible Assets [Line Items]  
Weighted Average Useful Life Indefinite life