SUMMARY OF CLOUD AND LICENSE BUSINESS REVENUES BY ECOSYSTEM (Details) - USD ($) $ in Millions	3 Months Ended
Aug. 31, 2019	Aug. 31, 2018
Disaggregation of Revenue [Line Items]
Total revenue	$ 9,218	$ 9,193
Applications Revenues [Member]
Disaggregation of Revenue [Line Items]
Total revenue	2,821	2,761
Infrastructure Revenues [Member]
Disaggregation of Revenue [Line Items]
Total revenue	4,796	4,715
Ecosystem [Member]
Disaggregation of Revenue [Line Items]
Total revenue	$ 7,617	$ 7,476

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

Name:	us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration