EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
		Nov. 30, 2023	Nov. 30, 2022	Nov. 30, 2023	Nov. 30, 2022
Earnings Per Share [Abstract]
Net Income (Loss)		$ 2,503	$ 1,741	$ 4,923	$ 3,289
Weighted average common shares outstanding		2,746	2,695	2,737	2,690
Dilutive effect of employee stock plans		71	51	83	57
Dilutive weighted average common shares outstanding		2,817	2,746	2,820	2,747
Basic earnings per share		$ 0.91	$ 0.65	$ 1.8	$ 1.22
Diluted earnings per share		$ 0.89	$ 0.63	$ 1.75	$ 1.2
Shares subject to anti-dilutive restricted stock-based awards and stock options excluded from calculation	[1]	27	64	27	68

[1] These weighted shares relate to anti-dilutive restricted service based stock-based awards as calculated using the treasury stock method and contingently issuable shares pursuant to performance stock option arrangements. Such shares could be dilutive in the future.