SUMMARY OF TOTAL REVENUES BY GEOGRAPHIC REGION (Details) - USD ($) $ in Millions		3 Months Ended
		Aug. 31, 2020	Aug. 31, 2019
Disaggregation of Revenue [Line Items]
Total revenues		$ 9,367	$ 9,218
Americas [Member]
Disaggregation of Revenue [Line Items]
Total revenues		5,068	5,150
EMEA [Member]
Disaggregation of Revenue [Line Items]
Total revenues	[1]	2,738	2,553
Asia Pacific [Member]
Disaggregation of Revenue [Line Items]
Total revenues		$ 1,561	$ 1,515

[1] Comprised of Europe, the Middle East and Africa