SCHEDULE II Valuation and Qualifying Accounts - Tabular Disclosure (Details) - Valuation Allowance of Deferred Tax Assets - USD ($) $ in Millions	12 Months Ended
	May 26, 2019	May 27, 2018	May 28, 2017
Valuation and Qualifying Accounts
Valuation Allowances and Reserves, Balance, Beginning Balance	$ 62.0	$ 98.4	$ 12.3
Additions Charged to Costs, Expenses and Equity	3.7		86.1
Deductions from Reserves	1.1	36.4
Valuation Allowances and Reserves, Balance, Ending Balance	$ 64.6	$ 62.0	$ 98.4