SUMMARY OF TOTAL REVENUES BY GEOGRAPHIC REGION (Details) - USD ($) $ in Millions		3 Months Ended
		Aug. 31, 2019	Aug. 31, 2018
Disaggregation of Revenue [Line Items]
Total revenues		$ 9,218	$ 9,193
Americas [Member]
Disaggregation of Revenue [Line Items]
Total revenues		5,150	5,161
EMEA [Member]
Disaggregation of Revenue [Line Items]
Total revenues	[1]	2,553	2,576
Asia Pacific [Member]
Disaggregation of Revenue [Line Items]
Total revenues		$ 1,515	$ 1,456

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