SUMMARY OF TOTAL REVENUES BY GEOGRAPHIC REGION (Details) - USD ($) $ in Millions		12 Months Ended
		May 31, 2020	May 31, 2019	May 31, 2018
Disaggregation of Revenue [Line Items]
Total revenues		$ 39,068	$ 39,506	$ 39,383
Americas [Member]
Disaggregation of Revenue [Line Items]
Total revenues		21,563	21,856	21,648
EMEA [Member]
Disaggregation of Revenue [Line Items]
Total revenues	[1]	11,035	11,270	11,409
Asia Pacific [Member]
Disaggregation of Revenue [Line Items]
Total revenues		$ 6,470	$ 6,380	$ 6,326

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