EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
		Nov. 30, 2025	Nov. 30, 2024	Nov. 30, 2025	Nov. 30, 2024
Earnings Per Share [Abstract]
Net income		$ 6,135	$ 3,151	$ 9,062	$ 6,080
Weighted-average common shares outstanding		2,864	2,790	2,845	2,775
Dilutive effect of employee stock plans		58	79	71	85
Dilutive weighted-average common shares outstanding		2,922	2,869	2,916	2,860
Basic earnings per share		$ 2.14	$ 1.13	$ 3.19	$ 2.19
Diluted earnings per share		$ 2.1	$ 1.1	$ 3.11	$ 2.13
Anti-dilutive stock awards excluded from calculation	[1]	16	22	9	23

[1] These stock awards relate to anti-dilutive restricted stock-based awards and stock options, both of which were service-based, as calculated using the treasury stock method and contingently issuable shares pursuant to PSO arrangements. Such shares could be dilutive in the future.