LEGAL PROCEEDINGS (Details) - USD ($)		3 Months Ended
	Jun. 30, 2016	Aug. 31, 2018
Hewlett-Packard Litigation [Member]
Legal Proceedings [Line Items]
Damages awarded, value	$ 3,000,000,000
Damages paid, value		$ 0
Inestimable loss related to litigation		We cannot currently estimate a reasonably possible range of loss for this action due to the complexities and uncertainty surrounding the appeal process and the nature of the claims.
Hewlett-Packard Litigation [Member] | Surety Bond [Member]
Legal Proceedings [Line Items]
Guarantor obligations, origin and purpose		Oracle posted certain court-mandated surety bonds with the court in order to proceed with its motion for a new trial and entered into related indemnification agreements with each of the surety bond issuing companies.
Derivative Litigation [Member]
Legal Proceedings [Line Items]
Derivative litigations and related action		While Oracle continues to evaluate these claims, we do not believe this litigation will have a material impact on our financial position or results of operations.
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.