STOCKHOLDERS' (DEFICIT) EQUITY (Details) - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2021	Aug. 31, 2020
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	$ 545	$ 428
Cloud services and license support [Member]
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	40	30
Hardware [Member]
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	3	3
Services [Member]
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	14	12
Sales and marketing [Member]
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	95	71
Research and development [Member]
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	344	276
General and administrative [Member]
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	$ 49	$ 36