SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Balances of Allowance for Doubtful Accounts and Changes Therein (Details) - Allowance for doubtful receivables - USD ($) $ in Millions	12 Months Ended
	May 30, 2021	May 31, 2020	May 26, 2019
Movement in Valuation Allowances and Reserves
Balance at Beginning of Period	$ 2.6	$ 2.2	$ 1.7
Additions Charged to Costs and Expenses	0.6	1.2	0.6
Other	0.7	0.1	0.5
Deductions from Reserves	0.7	0.9	0.6
Balance at Close of Period	$ 3.2	$ 2.6	$ 2.2