FAIR VALUE MEASUREMENTS Narrative (Details) - Senior notes [Member] - USD ($) $ in Billions	Aug. 31, 2021	May 31, 2021
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total debt, carrying value	$ 82.7	$ 84.2
Fair Value Measurements Using Input Types Level 2 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total debt, fair value	$ 90.2	$ 89.6