EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Feb. 28, 2025	Feb. 29, 2024	Feb. 28, 2025	Feb. 29, 2024
Earnings Per Share [Abstract]
Net income		$ 2,936	$ 2,401	$ 9,016	$ 7,323
Weighted average common shares outstanding		2,799	2,748	2,783	2,741
Dilutive effect of employee stock plans		75	71	82	79
Dilutive weighted average common shares outstanding		2,874	2,819	2,865	2,820
Basic earnings per share		$ 1.05	$ 0.87	$ 3.24	$ 2.67
Diluted earnings per share		$ 1.02	$ 0.85	$ 3.15	$ 2.6
Anti-dilutive stock awards excluded from calculation	[1]	22	27	23	27

[1] These stock awards primarily relate to contingently issuable shares pursuant to performance stock option arrangements. Such shares could be dilutive in the future.