Pension and Savings Plans (Details 4) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Aug. 27, 2011	Aug. 28, 2010	Aug. 29, 2009
Actuarial assumptions used in determining the projected benefit obligation
Weighted average discount rate	5.13%	5.25%	6.24%
Expected long-term rate of return on plan assets	8.00%	8.00%	8.00%
Benefit payments are expected to be paid as follows
2012	$ 6,575
2013	7,236
2013	7,989
2014	8,705
2015	9,332
2017 - 2021	$ 56,199

An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Expected Long-Term Rate of Return on Plan Assets

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