RESTRUCTURING ACTIVITIES Narrative (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Nov. 30, 2020	Nov. 30, 2019	Nov. 30, 2020	Nov. 30, 2019
Restructuring reserve [Line Items]
Restructuring expenses	$ 96	$ 42	$ 270	$ 120
Fiscal 2019 Oracle Restructuring [Member]
Restructuring reserve [Line Items]
Restructuring expenses			$ 269	$ 125

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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