DERIVATIVE FINANCIAL INSTRUMENTS - Schedule of Location and Amount of Gains (Losses) from Derivatives Not Designated as Hedging Instruments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 28, 2021	Feb. 23, 2020	Feb. 28, 2021	Feb. 23, 2020
Derivatives, Fair Value [Line Items]
Total gains (losses) from derivative instruments not designated as hedging instruments	$ 5.3	$ (5.7)	$ 1.4	$ (12.5)
Commodity contracts | Cost of goods sold
Derivatives, Fair Value [Line Items]
Total gains (losses) from derivative instruments not designated as hedging instruments	8.2	(3.5)	11.8	(8.0)
Foreign exchange contracts | Cost of goods sold
Derivatives, Fair Value [Line Items]
Total gains (losses) from derivative instruments not designated as hedging instruments	$ (2.9)	$ (2.2)	$ (10.4)	$ (4.5)