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Reconciliation of Provision for Income Taxes (Detail)	12 Months Ended
Reconciliation of Provision for Income Taxes (Detail)	Aug. 25, 2012	Aug. 27, 2011	Aug. 28, 2010
Federal tax at statutory U.S. income tax rate	35.00%	35.00%	35.00%
State income taxes, net	2.00%	1.70%	1.60%
Other	(1.00%)	(0.80%)	(0.20%)
Effective tax rate	36.00%	35.90%	36.40%

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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- Definition

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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