DEFERRED REVENUES (Details) - USD ($) $ in Millions	Feb. 28, 2019	May 31, 2018
Deferred Revenues [Line Items]
Deferred revenues, current	$ 8,007	$ 8,341
Deferred revenues, non-current (in other non-current liabilities)	626	625
Total deferred revenues	8,633	8,966
Cloud services and license support [Member] \| Cloud and License [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	6,807	7,265
Hardware [Member] \| Hardware [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	550	645
Services [Member] \| Services [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	378	404
Cloud license and on-premise license [Member] \| Cloud and License [Member]
Deferred Revenues [Line Items]
Deferred revenues, current	$ 272	$ 27

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as noncurrent.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130532-203044

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130531-203044

Name:	us-gaap_ContractWithCustomerLiabilityNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant