DEFERRED REVENUES (Details) - USD ($) $ in Millions	Nov. 30, 2019	May 31, 2019
Deferred Revenues [Line Items]
Deferred revenues, current	$ 8,087	$ 8,374
Deferred revenues, non-current (in other non-current liabilities)	615	669
Total deferred revenues	8,702	9,043
Cloud services and license support [Member] | Cloud and License [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	7,126	7,340
Hardware [Member] | Hardware [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	585	635
Services [Member] | Services [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	327	360
Cloud license and on-premise license [Member] | Cloud and License [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	$ 49	$ 39