STOCK-BASED COMPENSATION - Restricted Stock and Restricted Stock Units (Details) - Restricted stock and restricted stock units $ in Millions	6 Months Ended
	Nov. 30, 2023 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs from restricted stock, net of estimated forfeitures	$ 859
Unrecognized compensation costs from stock options, net of estimated forfeitures, to be recognized as operating overhead expense over a weighted average period	2 years 8 months 12 days