The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

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Percentage of assumed long-term growth in revenues, used as an input to measure fair value.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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The present value at a future point in time of all future cash flows when we expect stable growth rate forever.

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Goodwill And Other Intangible Assets (Narrative) (Details) (USD $)	3 Months Ended
	Feb. 28, 2015	Nov. 30, 2014	Feb. 28, 2014	Aug. 31, 2014
Finite Lived Intangible Assets [Line Items]
Goodwill	$ 96,444,000us-gaap_Goodwill			$ 95,499,000us-gaap_Goodwill
Fair value inputs, discount rate	9.00%us-gaap_FairValueInputsDiscountRate
Fair value inputs, long-term revenue growth rate	4.50%
Fair value inputs, terminal growth rate	2.00%wdfc_FairValueInputsTerminalGrowthRate
GT 85 Limited [Member]
Finite Lived Intangible Assets [Line Items]
Purchase consideration		4,100,000
Cash paid		3,700,000
Goodwill	1,300,000
Goodwill expected to be deductible for tax purposes	1,300,000
Establissments Decloedt [Member]
Finite Lived Intangible Assets [Line Items]
Cash paid			1,800,000
Customer-Related [Member] \| GT 85 Limited [Member]
Finite Lived Intangible Assets [Line Items]
Purchase consideration		1,700,000
Estimated useful life		8 years
Trade Names [Member] \| GT 85 Limited [Member]
Finite Lived Intangible Assets [Line Items]
Purchase consideration		900,000
Estimated useful life		10 years
Technology-Based [Member] \| GT 85 Limited [Member]
Finite Lived Intangible Assets [Line Items]
Purchase consideration		$ 200,000
Estimated useful life		4 years
Customer Lists [Member] \| Establissments Decloedt [Member]
Finite Lived Intangible Assets [Line Items]
Estimated useful life			5 years