DEFERRED REVENUES (Details) - USD ($) $ in Millions	Nov. 30, 2020	May 31, 2020
Deferred Revenues [Line Items]
Deferred revenues, current	$ 8,062	$ 8,002
Deferred revenues, non-current (in other non-current liabilities)	656	597
Total deferred revenues	8,718	8,599
Cloud services and license support [Member] | Cloud and License [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	7,057	6,996
Hardware [Member] | Hardware [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	570	613
Services [Member] | Services [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	395	365
Cloud license and on-premise license [Member] | Cloud and License [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	$ 40	$ 28