STOCKHOLDERS' EQUITY (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 30, 2025	Nov. 30, 2024	Nov. 30, 2025	Nov. 30, 2024
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	$ 1,156	$ 1,170	$ 2,280	$ 2,176
Cloud and Software [Member]
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	151	158	307	299
Hardware [Member]
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	7	8	14	14
Services [Member]
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	51	53	100	96
Sales and marketing [Member]
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	185	195	362	356
Research and development [Member]
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	668	657	1,314	1,226
General and administrative [Member]
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation	$ 94	$ 99	$ 183	$ 185