Goodwill and Other Intangible Assets - Weighted Average Useful Life of Intangible Assets (Detail)	6 Months Ended
	Nov. 30, 2014
Core technology [Member]
Goodwill And Other Intangible Assets [Line Items]
Weighted Average Useful Life	14 years
Completed technology [Member]
Goodwill And Other Intangible Assets [Line Items]
Weighted Average Useful Life	8 years
Product trade names [Member]
Goodwill And Other Intangible Assets [Line Items]
Weighted Average Useful Life	12 years
Customer relationships [Member]
Goodwill And Other Intangible Assets [Line Items]
Weighted Average Useful Life	13 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