LEASES - Schedule of Operating and Finance Leases Reported in Balance Sheet (Details) $ in Millions	May 31, 2020 USD ($)
Leases [Abstract]
ROU assets, net	$ 209.3
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent
Lease liabilities (current)	$ 44.4
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherAccruedLiabilitiesCurrent
Lease liabilities (noncurrent)	$ 206.1
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent
ROU assets, at cost	$ 220.4
Less accumulated depreciation	(53.6)
ROU assets, net	$ 166.8
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentNet
Lease liabilities (current)	$ 22.2
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent
Lease liabilities (noncurrent)	$ 132.9
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:SeniorLongTermNotes