Leases (Details Textuals) (USD $)	12 Months Ended
Aug. 27, 2011	Aug. 28, 2010	Aug. 29, 2009
Operating Leased Assets [Line Items]
Remaining aggregate rental obligation	$ 1,851,453,000
Leases (Textuals) [Abstract]
Rental expenses	213,800,000	195,600,000	181,300,000
Capital lease assets	86,600,000	85,800,000
Capital lease, accumulated amortization	30,200,000	20,400,000
Capital lease obligations	86,700,000	88,300,000
Current portion of capital lease obligations	25,296,000	21,947,000
Deferred rent	77,600,000	67,600,000
Sublease in connection with sale of TruckPro business [Member]
Operating Leased Assets [Line Items]
Initial term of subleased properties in connection with sale of TruckPro business	Not less than 20 years
Remaining aggregate rental obligation	$ 18,900,000

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Lease Term.

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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The total gross amount less the charge for the use of the long-lived depreciable assets subject to a lease meeting the criteria for capitalization.

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The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization.

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The cumulative difference between the rental payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense over the term of the leased property by the lessor or lessee, respectively.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The total of future contractually required payments on leases defined as operating.

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Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

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