DEFERRED REVENUES (Details) - USD ($) $ in Millions	Feb. 29, 2020	May 31, 2019
Deferred Revenues [Line Items]
Deferred revenues, current	$ 7,814	$ 8,374
Deferred revenues, non-current (in other non-current liabilities)	603	669
Total deferred revenues	8,417	9,043
Cloud services and license support [Member] | Cloud and License [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	6,859	7,340
Hardware [Member] | Hardware [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	566	635
Services [Member] | Services [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	358	360
Cloud license and on-premise license [Member] | Cloud and License [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	$ 31	$ 39