Changes in Goodwill Allocated to Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Nov. 30, 2014	Aug. 31, 2014
Goodwill [Line Items]
Gross, Beginning balance	$ 1,403,466us-gaap_GoodwillGross
Accumulated Impairment, Beginning balance	(1,019,822)
Foreign Currency Impact	(1,016)us-gaap_GoodwillTranslationAdjustments
Gross, Ending balance	1,402,450us-gaap_GoodwillGross
Accumulated Impairment, Ending balance	(1,019,822)
Net Balance	382,628us-gaap_Goodwill	383,644us-gaap_Goodwill
EMS
Goodwill [Line Items]
Gross, Beginning balance	474,305
Accumulated Impairment, Beginning balance	(464,053)
Foreign Currency Impact	(345)
Gross, Ending balance	473,960
Accumulated Impairment, Ending balance	(464,053)
Net Balance	9,907
DMS
Goodwill [Line Items]
Gross, Beginning balance	929,161
Accumulated Impairment, Beginning balance	(555,769)
Foreign Currency Impact	(671)
Gross, Ending balance	928,490
Accumulated Impairment, Ending balance	(555,769)
Net Balance	$ 372,721

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

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Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a,h)

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Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

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