SCHEDULE II Valuation and Qualifying Accounts - Tabular Disclosure (Details) - USD ($) $ in Millions	12 Months Ended
	May 28, 2017	May 29, 2016	May 31, 2015
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance, Beginning Balance	$ 12.8	$ 9.7	$ 4.4
Additions Charged to Costs, Expenses and Equity	86.2	3.9	5.5
Deductions from Reserves	0.1	0.8	0.2
Valuation Allowances and Reserves, Balance, Ending Balance	98.9	12.8	9.7
Allowance for Doubtful Accounts, Current
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance, Beginning Balance	0.5	0.8	0.5
Additions Charged to Costs, Expenses and Equity	0.1	0.5	0.5
Deductions from Reserves	0.1	0.8	0.2
Valuation Allowances and Reserves, Balance, Ending Balance	0.5	0.5	0.8
Valuation Allowance of Deferred Tax Assets
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance, Beginning Balance	12.3	8.9	3.9
Additions Charged to Costs, Expenses and Equity	86.1	3.4	5.0
Valuation Allowances and Reserves, Balance, Ending Balance	$ 98.4	$ 12.3	$ 8.9