FAIR VALUE MEASUREMENTS Narrative (Details) - Senior notes [Member] - USD ($) $ in Billions	Nov. 30, 2020	May 31, 2020
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total debt, carrying value	$ 70.8	$ 71.6
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	$ 82.1	$ 80.9

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Balance Type:	credit
Period Type:	instant