Schedule II Valuation and Qualifying Accounts (Details) - Allowance for doubtful receivables - USD ($) $ in Millions	12 Months Ended
	May 28, 2017	May 29, 2016	May 31, 2015
Movement in Valuation Allowances and Reserves
Balance at Beginning of Period	$ 3.2	$ 3.0	$ 2.2
Additions Charged to Costs and Expenses	1.0	1.1	2.0
Other	0.0	(0.1)	(0.1)
Deductions from Reserves	1.1	0.8	1.1
Balance at Close of Period	$ 3.1	$ 3.2	$ 3.0