Acquisition (Details) (Valbart Srl [Member]) In Millions	12 Months Ended
May 31, 2010 USD ($)	May 31, 2010 EUR (€)	Jul. 16, 2010 USD ($)
Acquisitions (Textuals) [Abstract]
Cash paid for acquisition			$ 199.4
Repayment of debt made by the company for acquisition			33.8
Sales generated by the acquired company		81
Sales at then-current exchange rates	$ 104

Amount of cash paid to acquire the entity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 68
-Subparagraph f(1)

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 51
-Subparagraph d

Name:	us-gaap_BusinessAcquisitionCostOfAcquiredEntityCashPaid
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant