BASIS OF PRESENTATION, RECENT ACCOUNTING PRONOUNCEMENTS AND OTHER (Details) - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2021	Aug. 31, 2020
Acquisition Related and Other Expenses [Abstract]
Transitional and other employee related costs	$ 2	$ 2
Business combination adjustments, net	3	1
Other, net	16	16
Total acquisition related and other expenses	21	19
Non-Operating Expenses, net [Abstract]
Interest income	20	31
Foreign currency losses, net	(35)	(50)
Noncontrolling interests in income	(47)	(38)
Other, net	21	55
Total non-operating expenses, net	$ (41)	$ (2)