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Commitments And Contingencies (Details) (USD $)
9 Months Ended
Feb. 24, 2013
Feb. 24, 2013
Workers Compensation and General Liabilities Accrued
May 27, 2012
Workers Compensation and General Liabilities Accrued
Feb. 24, 2013
Operating Lease Obligation
May 27, 2012
Operating Lease Obligation
Feb. 24, 2013
Property Lease Guarantee
May 27, 2012
Property Lease Guarantee
Commitment and Contigencies [Line Items]              
Standby letters of credit   $ 107,000,000 $ 99,200,000 $ 20,800,000 $ 20,300,000    
Guarantees associated with leased properties           4,500,000 5,400,000
Fair value of potential payments discounted at pre-tax cost of capital related to guarantee obligations           3,600,000 4,100,000
Accrued liabilities resulting from reassessment of likelihood of third parties defaulting on assignment agreements $ 0