DEFERRED REVENUES (Details) - USD ($) $ in Millions	May 31, 2019	May 31, 2018
Deferred Revenues [Line Items]
Deferred revenues, current	$ 8,374	$ 8,341
Deferred revenues, non-current (in other non-current liabilities)	669	625
Total deferred revenues	9,043	8,966
Cloud services and license support [Member] | Cloud and License [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	7,340	7,265
Hardware [Member] | Hardware [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	635	645
Services [Member] | Services [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	360	404
Cloud license and on-premise license [Member] | Cloud and License [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	$ 39	$ 27