Results of Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2013	Nov. 30, 2012	May 31, 2013
Segment Reporting Information [Line Items]
Net Sales	$ 1,071,487	$ 1,017,426	$ 2,236,161	$ 2,064,140
Income (Loss) Before Income Taxes	97,584	71,042	244,800	143,104
Total Assets	4,070,521	4,115,526	4,070,521	4,115,526	4,115,526
Industrial Segment
Segment Reporting Information [Line Items]
Net Sales	708,713	691,076	1,439,939	1,394,411
Income (Loss) Before Income Taxes	81,394	75,495	178,975	149,799
Total Assets	2,338,802	2,461,163	2,338,802	2,461,163
Consumer Segment
Segment Reporting Information [Line Items]
Net Sales	362,774	326,350	796,222	669,729
Income (Loss) Before Income Taxes	51,720	38,561	134,437	97,349
Total Assets	1,613,339	1,584,336	1,613,339	1,584,336
Corporate/Other
Segment Reporting Information [Line Items]
Income (Loss) Before Income Taxes	(35,530)	(43,014)	(68,612)	(104,044)
Total Assets	$ 118,380	$ 70,027	$ 118,380	$ 70,027