BASIS OF PRESENTATION, RECENT ACCOUNTING PRONOUNCEMENTS AND OTHER (Details) - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2020	Aug. 31, 2019
Acquisition Related and Other Expenses [Abstract]
Transitional and other employee related costs	$ 2	$ 4
Business combination adjustments, net	1	3
Other, net	16	18
Total acquisition related and other expenses	19	25
Non-Operating Income, net [Abstract]
Interest income	31	190
Foreign currency losses, net	(50)	(55)
Noncontrolling interests in income	(38)	(40)
Other, net	55	4
Total non-operating (expenses) income, net	$ (2)	$ 99