SUMMARY OF CLOUD SERVICES AND LICENSE SUPPORT REVENUES BY ECOSYSTEMS (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Disaggregation of Revenue [Line Items]
Total revenues	$ 40,479	$ 39,068	$ 39,506
Applications Cloud Services and License Support [Member]
Disaggregation of Revenue [Line Items]
Total revenues	11,712	11,015	10,553
Infrastructure Cloud Services and License Support [Member]
Disaggregation of Revenue [Line Items]
Total revenues	16,988	16,377	16,154
Cloud services and license support [Member]
Disaggregation of Revenue [Line Items]
Total revenues	$ 28,700	$ 27,392	$ 26,707