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Pension and Savings Plans (Details 1) (USD $) In Thousands				12 Months Ended
Pension and Savings Plans (Details 1) (USD $) In Thousands	Aug. 27, 2011	Aug. 28, 2010	Aug. 29, 2009	Aug. 27, 2011 Level 3 [Member]
Change in fair value of Level 3 assets
Beginning balance	$ 156,883	$ 117,243	$ 115,313	$ 11,696
Actual return on plan assets:
Assets held				713
Assets sold during the year				1,361
Sales and settlements				(8,489)
Ending balance	$ 156,883	$ 117,243	$ 115,313	$ 5,281

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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