EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Feb. 28, 2023	Feb. 28, 2022	Feb. 28, 2023	Feb. 28, 2022
Earnings Per Share [Abstract]
Net income		$ 1,896	$ 2,319	$ 5,184	$ 3,528
Weighted average common shares outstanding		2,698	2,670	2,692	2,711
Dilutive effect of employee stock plans		78	84	65	89
Dilutive weighted average common shares outstanding		2,776	2,754	2,757	2,800
Basic earnings per share		$ 0.70	$ 0.87	$ 1.93	$ 1.30
Diluted earnings per share		$ 0.68	$ 0.84	$ 1.88	$ 1.26
Shares subject to anti-dilutive restricted stock-based awards and stock options excluded from calculation	[1]	33	33	56	32

[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 Options arrangements. Such shares could be dilutive in the future.