SUMMARY OF CLOUD SERVICES AND LICENSE SUPPORT REVENUES BY ECOSYSTEMS (Details) - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2020	Aug. 31, 2019
Disaggregation of Revenue [Line Items]
Total revenues	$ 9,367	$ 9,218
Applications Cloud Services and License Support [Member]
Disaggregation of Revenue [Line Items]
Total revenues	2,816	2,704
Infrastructure Cloud Services and License Support [Member]
Disaggregation of Revenue [Line Items]
Total revenues	4,131	4,101
Cloud services and license support [Member]
Disaggregation of Revenue [Line Items]
Total revenues	$ 6,947	$ 6,805