EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		12 Months Ended
		May 31, 2022	May 31, 2021	May 31, 2020
Earnings Per Share [Abstract]
Net income		$ 6,717	$ 13,746	$ 10,135
Weighted average common shares outstanding		2,700	2,945	3,211
Dilutive effect of employee stock plans		86	77	83
Dilutive weighted average common shares outstanding		2,786	3,022	3,294
Basic earnings per share		$ 2.49	$ 4.67	$ 3.16
Diluted earnings per share		$ 2.41	$ 4.55	$ 3.08
Shares subject to anti-dilutive restricted stock-based awards and stock options excluded from calculation	[1]	34	36	56

[1] Substantially all of these weighted shares related to contingently issuable shares pursuant to PSO arrangements that could be dilutive in the future. See Note 12 for information regarding the exercise prices of our outstanding, unexercised stock options.