Weighted-Average Actuarial Assumptions used to Determine Benefit Obligations (Detail)	Aug. 31, 2013	Aug. 31, 2012
Compensation And Retirement Disclosure [Abstract]
Expected long-term return on plan assets	5.10%	4.20%
Rate of compensation increase	3.90%	3.30%
Discount rate	4.10%	3.20%

An assumption as to the rate of return on plan assets in determining the benefit obligation.

No definition available.

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- Details

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- Definition

The interest rate used to adjust for the time value of money for the plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (k)(1)

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

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- Definition

Expected rate of compensation increases (for pay-related plans).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (k)(2)

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

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