STOCKHOLDERS' (DEFICIT) EQUITY (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2021	Nov. 30, 2020
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	$ 681	$ 488	$ 1,226	$ 916
Cloud services and license support [Member]
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	50	36	90	66
Hardware [Member]
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	4	3	7	6
Services [Member]
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	18	14	32	26
Sales and marketing [Member]
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	120	80	215	151
Research and development [Member]
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	423	314	767	590
General and administrative [Member]
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	$ 66	$ 41	$ 115	$ 77