SUMMARY OF CLOUD SERVICE AND LICENSE SUPPORT REVENUES BY ECOSYSTEMS (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Feb. 29, 2020	Feb. 28, 2019	Feb. 29, 2020	Feb. 28, 2019
Disaggregation of Revenue [Line Items]
Total revenue	$ 9,796	$ 9,614	$ 28,629	$ 28,369
Applications Cloud Services and License Support [Member]
Disaggregation of Revenue [Line Items]
Total revenue	2,809	2,637	8,265	7,838
Infrastructure Cloud Services and License Support [Member]
Disaggregation of Revenue [Line Items]
Total revenue	4,121	4,025	12,281	12,070
Cloud services and license support [Member]
Disaggregation of Revenue [Line Items]
Total revenue	$ 6,930	$ 6,662	$ 20,546	$ 19,908

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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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration