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Commitments And Contingencies (Details) (USD $)
6 Months Ended
Nov. 27, 2011
Nov. 27, 2011
Workers Compensation And General Liabilities Accrued [Member]
May 29, 2011
Workers Compensation And General Liabilities Accrued [Member]
Nov. 27, 2011
Operating Lease Obligation [Member]
May 29, 2011
Operating Lease Obligation [Member]
Nov. 27, 2011
Property Lease Guarantee [Member]
May 29, 2011
Property Lease Guarantee [Member]
Standby letters of credit   $ 99,200,000 $ 96,400,000 $ 18,000,000 $ 16,800,000    
Loss Contingency, Range of Possible Loss, Maximum           6,000,000 7,400,000
Fair value of potential payments discounted at pre-tax cost of capital related to guarantee obligations           4,500,000 5,400,000
Accrued liabilities resulting from reassessment of likelihood of third parties defaulting on assignment agreements $ 0