SUMMARY OF CLOUD SERVICES AND LICENSE SUPPORT REVENUES BY ECOSYSTEMS (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 30, 2020	Nov. 30, 2019	Nov. 30, 2020	Nov. 30, 2019
Disaggregation of Revenue [Line Items]
Total revenues	$ 9,800	$ 9,614	$ 19,167	$ 18,832
Applications Cloud Services and License Support [Member]
Disaggregation of Revenue [Line Items]
Total revenues	2,901	2,753	5,717	5,457
Infrastructure Cloud Services and License Support [Member]
Disaggregation of Revenue [Line Items]
Total revenues	4,211	4,058	8,342	8,159
Cloud services and license support [Member]
Disaggregation of Revenue [Line Items]
Total revenues	$ 7,112	$ 6,811	$ 14,059	$ 13,616