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Property And Equipment (Narrative) (Details) - Aug. 31, 2018 £ in Millions, $ in Millions	GBP (£)	USD ($)
Property And Equipment [Abstract]
Capital costs	£ 5.6	$ 7.3

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- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

Capital Costs

+ References

No definition available.

+ Details

Name:	wdfc_CapitalCosts
Namespace Prefix:	wdfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant