RESTRUCTURING ACTIVITIES Narrative (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2021	Nov. 30, 2020
Restructuring reserve [Line Items]
Restructuring expenses		$ 32	$ 96	$ 70	$ 270
Fiscal 2022 Oracle Restructuring [Member]
Restructuring reserve [Line Items]
Total estimated restructuring costs	[1]	353		353
Restructuring expenses				92
Remaining expenses to incur		261		$ 261
Expected completion date				May 31, 2024
Fiscal 2022 Oracle Restructuring [Member] | Maximum [Member]
Restructuring reserve [Line Items]
Total estimated restructuring costs		$ 353		$ 353

[1] Restructuring costs recorded for individual line items primarily related to employee severance costs.