DEFERRED REVENUES (Details) - USD ($) $ in Millions	Aug. 31, 2018	May 31, 2018
Deferred Revenues [Line Items]
Deferred revenues, current	$ 10,349	$ 8,341
Deferred revenues, non-current (in other non-current liabilities)	670	625
Total deferred revenues	11,019	8,966
Cloud services and license support [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	8,924	7,265
Hardware [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	707	645
Services [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	438	404
Cloud license and on-premise license [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	$ 280	$ 27