SUMMARY OF CLOUD AND LICENSE BUSINESS REVENUES BY ECOSYSTEM (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2019	Nov. 30, 2018
Disaggregation of Revenue [Line Items]
Total revenue	$ 9,614	$ 9,562	$ 18,832	$ 18,755
Applications Revenues [Member]
Disaggregation of Revenue [Line Items]
Total revenue	2,909	2,808	5,730	5,569
Infrastructure Revenues [Member]
Disaggregation of Revenue [Line Items]
Total revenue	5,028	5,046	9,823	9,760
Ecosystem [Member]
Disaggregation of Revenue [Line Items]
Total revenue	$ 7,937	$ 7,854	$ 15,553	$ 15,329

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

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Period Type:	duration