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Commitments And Contingencies (Details) - USD ($)
$ in Millions
Nov. 29, 2015
May. 31, 2015
Workers Compensation and General Liabilities Accrued    
Loss Contingencies [Line Items]    
Standby letters of credit $ 119.2 $ 124.2
Operating Lease Obligations and Other Payments    
Loss Contingencies [Line Items]    
Standby letters of credit 13.4 14.0
Property Lease Guarantee    
Loss Contingencies [Line Items]    
Guarantees associated with leased properties 145.5 147.7
Fair value of potential payments discounted at pre-tax cost of capital related to guarantee obligations $ 112.6 $ 113.4