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Commitments And Contingencies (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	May 26, 2013	May 27, 2012
Commitments and Contingencies [Line Items]
Guarantees of leased properties assigned to third parties	$ 4.2	$ 5.4
Fair value of potential payments discounted at pre-tax cost of capital related to guarantee obligations	3.4	4.1
Lease expiration date	fiscal 2015 through fiscal 2021
Workers Compensation And General Liabilities Accrued
Commitments and Contingencies [Line Items]
Standby letters of credit	107.0	99.2
Operating Lease Obligation
Commitments and Contingencies [Line Items]
Standby letters of credit	$ 20.6	$ 20.3

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount of contractual guarantees to which the Company is obligated as of the balance sheet date.

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