Results of Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Aug. 31, 2014	Aug. 31, 2013	May 31, 2014
Segment Reporting Information [Line Items]
Net Sales	$ 1,203,896	$ 1,164,674
Income (Loss) Before Income Taxes	148,078	147,216
Total Assets	4,346,722		4,378,365
Operating Segments | Industrial Segment
Segment Reporting Information [Line Items]
Net Sales	773,886	731,226
Income (Loss) Before Income Taxes	102,464	97,581
Total Assets	2,418,189		2,507,257
Operating Segments | Consumer Segment
Segment Reporting Information [Line Items]
Net Sales	430,010	433,448
Income (Loss) Before Income Taxes	76,669	82,717
Total Assets	1,734,551		1,648,272
Corporate/Other
Segment Reporting Information [Line Items]
Income (Loss) Before Income Taxes	(31,055)	(33,082)
Total Assets	$ 193,982		$ 222,836