Results of Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014	Feb. 28, 2013	May 31, 2013
Segment Reporting Information [Line Items]
Net Sales	$ 863,410	$ 843,736	$ 3,099,571	$ 2,907,876
Income (Loss) Before Income Taxes	25,185	(62,823)	269,985	80,281
Total Assets	4,033,805	4,115,526	4,033,805	4,115,526	4,115,526
Industrial Segment
Segment Reporting Information [Line Items]
Net Sales	560,537	532,336	2,000,476	1,926,747
Income (Loss) Before Income Taxes	20,284	(68,643)	199,259	81,156
Total Assets	2,245,673	2,461,163	2,245,673	2,461,163
Consumer Segment
Segment Reporting Information [Line Items]
Net Sales	302,873	311,400	1,099,095	981,129
Income (Loss) Before Income Taxes	30,794	34,720	165,231	132,069
Total Assets	1,653,254	1,584,336	1,653,254	1,584,336
Corporate/Other
Segment Reporting Information [Line Items]
Income (Loss) Before Income Taxes	(25,893)	(28,900)	(94,505)	(132,944)
Total Assets	$ 134,878	$ 70,027	$ 134,878	$ 70,027