INCOME TAXES - Components of Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2026	May 31, 2025	May 31, 2024
Provision for Income Taxes [Abstract]
Federal	$ 1,072	$ 1,172	$ 999
State	307	196	420
Foreign	2,005	1,986	1,994
Total current provision	3,384	3,354	3,413
Federal	(1,783)	(2,208)	(2,020)
State	(152)	(202)	(280)
Foreign	1,018	773	161
Total deferred benefit	(917)	(1,637)	(2,139)
Total provision for income taxes	$ 2,467	$ 1,717	$ 1,274
Effective income tax rate	12.60%	12.10%	10.90%