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Goodwill And Other Intangible Assets (Summary Of Definite-Lived Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Feb. 28, 2015	Aug. 31, 2014
Goodwill And Other Intangible Assets [Abstract]
Gross carrying amount	$ 38,931us-gaap_FiniteLivedIntangibleAssetsGross	$ 36,670us-gaap_FiniteLivedIntangibleAssetsGross
Accumulated amortization	(13,220)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization	(12,021)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Accumulated impairment of intangible assets	(1,077)wdfc_FiniteLivedIntangibleAssetsAccumulatedImpairment	(1,077)wdfc_FiniteLivedIntangibleAssetsAccumulatedImpairment
Translation adjustments	(123)wdfc_FiniteLivedIntangibleAssetTranslationAdjustments	99wdfc_FiniteLivedIntangibleAssetTranslationAdjustments
Net carrying amount	$ 24,511us-gaap_FiniteLivedIntangibleAssetsNet	$ 23,671us-gaap_FiniteLivedIntangibleAssetsNet

X

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	debit
Period Type:	instant

X

- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

+ Details

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X

- Definition

Finite-Lived Intangible Assets, Accumulated Impairment

+ References

No definition available.

+ Details

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X

- Definition

The increase (decrease) to the recorded value of finite lived intangible assets for foreign currency translation adjustments.

+ References

No definition available.

+ Details

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