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Other Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Aug. 31, 2013	Aug. 31, 2012	Aug. 31, 2011
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	6.60%
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	10.00%
Discretionary Non-elective Contribution, Percentage	5.00%
Defined Contribution Pension [Member]
Defined Contribution Plan, Cost Recognized	$ 2.7	$ 2.6	$ 2.3
Foreign Pension Plans, Defined Benefit [Member]
Defined Contribution Plan, Cost Recognized	$ 1.3	$ 1.1	$ 1.0

X

- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 70

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942



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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 11

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

No definition available.

+ Details

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Namespace Prefix:	wdfc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage employer matches of the employee's percentage contribution matched.

+ References

No definition available.

+ Details

Name:	wdfc_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix:	wdfc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	wdfc_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Namespace Prefix:	wdfc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Discretionary Non-elective Contribution, Percentage

+ References

No definition available.

+ Details

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Namespace Prefix:	wdfc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration