SUMMARY OF TOTAL REVENUES BY GEOGRAPHIC REGION (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Nov. 30, 2020	Nov. 30, 2019	Nov. 30, 2020	Nov. 30, 2019
Disaggregation of Revenue [Line Items]
Total revenues		$ 9,800	$ 9,614	$ 19,167	$ 18,832
Americas [Member]
Disaggregation of Revenue [Line Items]
Total revenues		5,259	5,304	10,327	10,454
EMEA [Member]
Disaggregation of Revenue [Line Items]
Total revenues	[1]	2,852	2,695	5,590	5,248
Asia Pacific [Member]
Disaggregation of Revenue [Line Items]
Total revenues		$ 1,689	$ 1,615	$ 3,250	$ 3,130

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