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ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES Narrative (Details) | 12 Months Ended
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May. 31, 2015
Basis of Financial Statements [Abstract] |
Accounting changes | In fiscal 2015, we adopted Accounting Standards Update (ASU) No. 2015-03, Interest—Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs (ASU 2015-03). In connection with the adoption of ASU 2015-03, we reclassified debt issuance costs related to our senior notes from other assets to notes payable, non-current as a deduction to the carrying amounts of our senior notes in our May 31, 2015 and 2014 consolidated balance sheets. The adoption of ASU 2015-03 did not have a material impact on our consolidated financial statements.
Concentrations of Risk [Abstract] |
Customer Concentrations | No single customer accounted for 10% or more of our total revenues in fiscal 2015, 2014 or 2013.
Supplier Concentrations | We outsource the design, manufacturing, assembly and delivery of certain of our hardware products to a variety of companies, many of which are located outside the United States. Further, we have simplified our supply chain processes by reducing the number of third party manufacturing partners and the number of locations where these third party manufacturers build our hardware systems products. The inability of these third party manufacturing partners to fulfill orders for our hardware products could adversely impact future operating results of our hardware systems business.
Credit Risk Concentrations | Financial instruments that are potentially subject to concentrations of credit risk consist primarily of cash and cash equivalents, marketable securities, derivatives and trade receivables. Our cash and cash equivalents are generally held with large, diverse financial institutions worldwide to reduce the amount of exposure to any single financial institution. Investment policies have been implemented that limit purchases of marketable debt securities to investment grade securities. Our derivative contracts are transacted with various financial institutions with high credit standings. We generally do not require collateral to secure accounts receivable. The risk with respect to trade receivables is mitigated by credit evaluations we perform on our customers, the short duration of our payment terms for the significant majority of our customer contracts and by the diversification of our customer base.
Property, Plant and Equipment (Impairment Assessments) [Abstract] |
Impairment of Property, Plant and Equipment | We did not recognize any significant property impairment charges in fiscal 2015, 2014 or 2013.
Research and Development and Software Development Costs [Abstract] |
Research and Development and Software Development Costs | Software development costs required to be capitalized under ASC 985-20, Costs of Software to be Sold, Leased or Marketed, and under ASC 350-40, Internal-Use Software, were not material to our consolidated financial statements in fiscal 2015, 2014 and 2013.

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- Definition Description of credit risk arising from all financial instruments, whether from an individual counterparty or groups of counterparties. Includes disclosures concerning (a) information about the (shared) activity, region or economic characteristic that identifies the concentration, (b) the maximum amount of loss due to credit risk that would be incurred if the counterparties failed completely to perform according to the terms of the contracts, and any security or collateral for the amount due proved to be of no value, (c) the entity's policy of requiring collateral or other security to support financial instruments subject to credit risk, information about the entity's access to that collateral or other security, and the nature and a brief description of the collateral or other security supporting those financial instruments, and (d) the policy of entering into and information about master netting arrangements to mitigate the credit risk of financial instruments, and a brief description of the terms of those arrangements, including the extent to which they would reduce the maximum amount of loss due to credit risk. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611 + Details
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