DEFERRED REVENUES (Details) - USD ($) $ in Millions	Feb. 28, 2019	May 31, 2018
Deferred Revenues [Line Items]
Deferred revenues, current	$ 8,007	$ 8,341
Deferred revenues, non-current (in other non-current liabilities)	626	625
Total deferred revenues	8,633	8,966
Cloud services and license support [Member] | Cloud and License [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	6,807	7,265
Hardware [Member] | Hardware [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	550	645
Services [Member] | Services [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	378	404
Cloud license and on-premise license [Member] | Cloud and License [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	$ 272	$ 27