LEGAL PROCEEDINGS (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		12 Months Ended
	Nov. 30, 2014	Nov. 30, 2014	Aug. 31, 2012	May. 31, 2015	May. 31, 2013	Nov. 14, 2014
Legal Proceedings [Line Items]
Benefit related to certain litigation				$ 53.0	$ 306.0
SAP Litigation [Member]
Legal Proceedings [Line Items]
Benefit related to certain litigation		$ 53.0	$ 306.0
Cash received against receivable balance		306.0
SAP litigation settlement interest amount received	$ 2.5
Total payment received in connection with SAP intellectual property litigation		$ 359.2
SAP litigation final judgment amount						$ 356.7
Other Litigation [Member]
Legal Proceedings [Line Items]
Other litigation				We are party to various other legal proceedings and claims, either asserted or unasserted, which arise in the ordinary course of business, including proceedings and claims that relate to acquisitions we have completed or to companies we have acquired or are attempting to acquire. While the outcome of these matters cannot be predicted with certainty, we do not believe that the outcome of any of these matters, individually or in the aggregate, will result in losses that are materially in excess of amounts already recognized, if any.
Hewlett-Packard Litigation [Member]
Legal Proceedings [Line Items]
Inestimable loss related to litigation				We cannot currently estimate a reasonably possible range of loss for this action.