Results of Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2015	Feb. 28, 2014	May 31, 2014
Segment Reporting Information [Line Items]
Net Sales	$ 946,367us-gaap_SalesRevenueNet	$ 863,410us-gaap_SalesRevenueNet	$ 3,221,391us-gaap_SalesRevenueNet	$ 3,099,571us-gaap_SalesRevenueNet
Income (Loss) Before Income Taxes	20,427	25,185	274,255	269,985
Total Assets	4,571,203us-gaap_Assets		4,571,203us-gaap_Assets		4,378,365us-gaap_Assets
Operating Segments \| Industrial Segment
Segment Reporting Information [Line Items]
Net Sales	619,997	560,537	2,112,230	2,000,476
Income (Loss) Before Income Taxes	16,558	20,284	196,131	199,259
Total Assets	2,572,244		2,572,244		2,507,257
Operating Segments \| Consumer Segment
Segment Reporting Information [Line Items]
Net Sales	326,370	302,873	1,109,161	1,099,095
Income (Loss) Before Income Taxes	35,049	30,794	173,280	165,231
Total Assets	1,622,420		1,622,420		1,648,272
Corporate/Other
Segment Reporting Information [Line Items]
Income (Loss) Before Income Taxes	(31,180)	(25,893)	(95,156)	(94,505)
Total Assets	$ 376,539		$ 376,539		$ 222,836

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.18)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-Name Regulation S-X (SX)

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Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(h)(1)(i))

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

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