Results of Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Feb. 28, 2013		Feb. 29, 2012	Feb. 28, 2013	Feb. 29, 2012	May 31, 2012
Segment Reporting Information [Line Items]
Net Sales	$ 843,736	[1]	$ 773,643	$ 2,907,876	$ 2,675,646
Income (Loss) Before Income Taxes	(34,479)	[1]	11,436	80,281	206,310
Total Assets	3,922,921			3,922,921		3,561,813
Industrial Segment
Segment Reporting Information [Line Items]
Net Sales	532,336	[1]	501,925	1,926,747	1,810,479
Income (Loss) Before Income Taxes	(40,299)	[1]	20,422	81,156	189,192
Total Assets	2,215,072			2,215,072		2,195,702
Consumer Segment
Segment Reporting Information [Line Items]
Net Sales	311,400	[1]	271,718	981,129	865,167
Income (Loss) Before Income Taxes	34,720	[1]	21,531	132,069	99,796
Total Assets	1,537,454			1,537,454		1,184,609
Corporate/Other
Segment Reporting Information [Line Items]
Income (Loss) Before Income Taxes	(28,900)	[1]	(30,517)	(132,944)	(82,678)
Total Assets	$ 170,395			$ 170,395		$ 181,502

[1] Restated