Results of Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2014	Nov. 30, 2013	May 31, 2014
Segment Reporting Information [Line Items]
Net Sales	$ 1,071,128	$ 1,071,487	$ 2,275,024	$ 2,236,161
Income (Loss) Before Income Taxes	105,750	97,584	253,828	244,800
Total Assets	4,197,253		4,197,253		4,378,365
Operating Segments | Industrial Segment
Segment Reporting Information [Line Items]
Net Sales	718,347	708,713	1,492,233	1,439,939
Income (Loss) Before Income Taxes	77,109	81,394	179,573	178,975
Total Assets	2,343,272		2,343,272		2,507,257
Operating Segments | Consumer Segment
Segment Reporting Information [Line Items]
Net Sales	352,781	362,774	782,791	796,222
Income (Loss) Before Income Taxes	61,562	51,720	138,231	134,437
Total Assets	1,700,055		1,700,055		1,648,272
Corporate/Other
Segment Reporting Information [Line Items]
Income (Loss) Before Income Taxes	(32,921)	(35,530)	(63,976)	(68,612)
Total Assets	$ 153,926		$ 153,926		$ 222,836