DERIVATIVE FINANCIAL INSTRUMENTS - Schedule of Location and Amount of Gain (Loss) from Derivatives Not Designated as Hedging Instruments (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2020	May 26, 2019	May 27, 2018
Derivatives, Fair Value [Line Items]
Total losses from derivative instruments not designated as hedging instruments	$ (12.9)	$ (3.6)	$ (0.6)
Commodity contracts | Cost of goods sold
Derivatives, Fair Value [Line Items]
Total losses from derivative instruments not designated as hedging instruments	(18.4)	(5.3)	3.0
Foreign exchange contracts | Cost of goods sold
Derivatives, Fair Value [Line Items]
Total losses from derivative instruments not designated as hedging instruments	$ 5.5	$ 1.7	(3.9)
Foreign exchange contracts | Selling, general and administrative expenses
Derivatives, Fair Value [Line Items]
Total losses from derivative instruments not designated as hedging instruments			$ 0.3