DEFERRED REVENUES (Details) - USD ($) $ in Millions	Feb. 28, 2021	May 31, 2020
Deferred Revenues [Line Items]
Deferred revenues, current	$ 8,088	$ 8,002
Deferred revenues, non-current (in other non-current liabilities)	670	597
Total deferred revenues	8,758	8,599
Cloud services and license support [Member] | Cloud and License [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	7,075	6,996
Hardware [Member] | Hardware [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	556	613
Services [Member] | Services [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	425	365
Cloud license and on-premise license [Member] | Cloud and License [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	$ 32	$ 28