DEFERRED REVENUES (Details) - USD ($) $ in Millions	May 31, 2018	May 31, 2017
Deferred Revenues [Line Items]
Deferred revenues, current	$ 8,429	$ 8,233
Deferred revenues, non-current (in other non-current liabilities)	625	602
Total deferred revenues	9,054	8,835
Cloud services and license support [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	7,292	7,144
Hardware [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	645	640
Services business [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	437	382
Cloud license and on-premise license [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	$ 55	$ 67