DEFERRED REVENUES (Details) - USD ($) $ in Millions	May 31, 2017	May 31, 2016
Deferred Revenues [Line Items]
Deferred revenues, current	$ 8,233	$ 7,655
Deferred revenues, non-current (in other non-current liabilities)	602	536
Total deferred revenues	8,835	8,191
Software license updates and product support [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	5,952	5,864
Cloud SaaS, PaaS and IaaS [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	1,192	705
Hardware [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	640	675
Services business [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	382	339
New software licenses [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	$ 67	$ 72