DEFERRED REVENUES (Details) - USD ($) $ in Millions	Aug. 31, 2017	May 31, 2017
Deferred Revenues [Line Items]
Deferred revenues, current	$ 10,269	$ 8,233
Deferred revenues, non-current (in other non-current liabilities)	653	602
Total deferred revenues	10,922	8,835
Software license updates and product support [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	7,690	5,952
Cloud SaaS, PaaS and IaaS [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	1,397	1,192
Hardware [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	716	640
Services business [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	407	382
New software licenses [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	$ 59	$ 67