EARNINGS (LOSS) PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
		Nov. 30, 2022	Nov. 30, 2021	Nov. 30, 2022	Nov. 30, 2021
Earnings Per Share [Abstract]
Net income (loss)		$ 1,741	$ (1,247)	$ 3,289	$ 1,209
Weighted average common shares outstanding		2,695	2,694	2,690	2,731
Dilutive effect of employee stock plans		51	0	57	92
Dilutive weighted average common shares outstanding		2,746	2,694	2,747	2,823
Basic earnings (loss) per share		$ 0.65	$ (0.46)	$ 1.22	$ 0.44
Diluted earnings (loss) per share		$ 0.63	$ (0.46)	$ 1.20	$ 0.43
Shares subject to anti-dilutive restricted stock-based awards and stock options excluded from calculation	[1]	64	121	68	31

[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.