OTHER (EXPENSE) INCOME	12 Months Ended
May 31, 2011
Other Income and Other Expense Disclosure [Text Block]	16. OTHER (EXPENSE) INCOME Other (expense) income, net for fiscal 2011 was $0.4 consisting of transaction costs incurred for a business acquisition in fiscal 2011. Other (expense) income, net for fiscal 2010 was $0.9 consisting of a gain related to the repurchase of 5% Notes. Other income, net for fiscal 2009 was $0.7 consisting of a gain of $0.4 related to the repurchase of 5% Notes and a gain of $0.3 related to an accelerated payment of a note.

The entire disclosure for other income or other expense items (both operating and nonoperating). Sources of nonoperating income or nonoperating expense that may be disclosed, include amounts earned from dividends, interest on securities, profits (losses) on securities, net and miscellaneous other income or income deductions.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 5
-Section 03
-Paragraph 3, 6, 7, 9

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3,6,7,9)
-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Name:	us-gaap_OtherIncomeAndOtherExpenseDisclosureTextBlock
Namespace Prefix:	us-gaap
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration