SUMMARY OF CLOUD SERVICES AND LICENSE SUPPORT REVENUES BY ECOSYSTEMS (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Disaggregation of Revenue [Line Items]
Total revenues	$ 10,085	$ 9,796	$ 29,252	$ 28,629
Applications Cloud Services and License Support [Member]
Disaggregation of Revenue [Line Items]
Total revenues	2,952	2,809	8,669	8,265
Infrastructure Cloud Services and License Support [Member]
Disaggregation of Revenue [Line Items]
Total revenues	4,300	4,121	12,642	12,281
Cloud services and license support [Member]
Disaggregation of Revenue [Line Items]
Total revenues	$ 7,252	$ 6,930	$ 21,311	$ 20,546