ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES Narrative (Details)	12 Months Ended
May 31, 2011
Concentrations of Credit Risk [Narrative] [Abstract]
Customer Concentrations	No single customer accounted for 10% or more of our total revenues in fiscal 2011, 2010 or 2009.
Goodwill, Intangible Assets and Impairment Assessments [Narrative] [Abstract]
Goodwill and Intangible Assets Impairment Charges	We did not recognize any goodwill or intangible asset impairment charges in fiscal 2011, 2010 or 2009.
Property, Plant and Equipment [Narrative] [Abstract]
Impairment of Property, Plant and Equipment	We did not recognize any significant property impairment charges in fiscal 2011, 2010 or 2009.
Research and Development Expense [Abstract]
Research and Development Expense	Costs eligible for capitalization under ASC 985-20, Software-Costs of Software to be Sold, Leased or Marketed, were not material to our consolidated financial statements in fiscal 2011, 2010 or 2009.

No single customer accounted for 10% or more of our total revenues in fiscal 2011, 2010 or 2009.

Goodwill and Intangible Assets Impairment Charges

We did not recognize any goodwill or intangible asset impairment charges in fiscal 2011, 2010 or 2009.

Impairment of Property, Plant and Equipment

We did not recognize any significant property impairment charges in fiscal 2011, 2010 or 2009.

Costs eligible for capitalization under ASC 985-20, Software-Costs of Software to be Sold, Leased or Marketed, were not material to our consolidated financial statements in fiscal 2011, 2010 or 2009.