Pension and Savings Plans - Actuarial Assumptions Used in Determining Projected Benefit Obligation (Detail)	12 Months Ended
Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011
Compensation And Retirement Disclosure [Abstract]
Weighted average discount rate	5.19%	3.90%	5.13%
Expected long-term rate of return on plan assets	7.50%	7.50%	8.00%

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

-Topic 715

-SubTopic 30

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

-URI http://asc.fasb.org/extlink&oid=6512013

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (k)(3)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

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