Commitments And Contingencies (Details) - USD ($) $ in Millions	May 27, 2018	May 28, 2017
Commitments and Contingencies [Line Items]
Guarantees of leased properties assigned to third parties	$ 154.0	$ 163.2
Fair value of potential payments discounted at pre-tax cost of capital related to guarantee obligations	131.0	137.6
Workers Compensation And General Liabilities Accrued
Commitments and Contingencies [Line Items]
Standby letters of credit	96.9	127.5
Operating Lease Obligation
Commitments and Contingencies [Line Items]
Standby letters of credit	$ 17.6	$ 10.6