DERIVATIVE FINANCIAL INSTRUMENTS - Schedule of Derivative Assets and Liabilities on a Gross Basis (Details) - Total derivatives not designated as hedging instruments - USD ($) $ in Millions	Feb. 23, 2020	May 26, 2019
Derivatives, Fair Value [Line Items]
Derivative Assets	$ 1.5	$ 6.4
Derivative Liabilities	4.9	1.8
Commodity contracts | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Derivative Assets	1.5	4.9
Commodity contracts | Other accrued liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	3.1	0.9
Foreign exchange contracts | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Derivative Assets	0.0	1.4
Foreign exchange contracts | Other accrued liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	$ 1.8	0.9
Other | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Derivative Assets		0.1
Other | Other accrued liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities		$ 0.0