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Commitments And Contingencies (Details) - USD ($)
$ in Millions
12 Months Ended
May 28, 2017
May 29, 2016
Commitments and Contingencies [Line Items]    
Guarantees of leased properties assigned to third parties $ 163.2 $ 154.2
Fair value of potential payments discounted at pre-tax cost of capital related to guarantee obligations $ 137.6 119.3
Lease expiration date fiscal 2017 through fiscal 2027  
Workers Compensation And General Liabilities Accrued    
Commitments and Contingencies [Line Items]    
Standby letters of credit $ 127.5 116.5
Operating Lease Obligation    
Commitments and Contingencies [Line Items]    
Standby letters of credit $ 10.6 $ 8.4