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Debt - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended		6 Months Ended
	Jan. 07, 2013	Jun. 17, 2011	Feb. 28, 2013
Debt Instrument [Line Items]
Revolving credit facility, amount	$ 125.0	$ 75.0
Revolving credit facility, maturity period	5 years	3 years
Revolving credit facility, expiration date	Jan. 07, 2018	Jun. 17, 2014
Outstanding loans and letters of credit maximum amount	62.5
Revolving credit facility additional borrowed			5.0
Revolving credit facility, amount outstanding			50.0
Minimum [Member]
Debt Instrument [Line Items]
LIBOR margin rate	0.85%
Commitment fee annual rate	0.85%
Commitment fee, annual rate applied to amount not borrowed	0.12%
Consolidated earnings before interest, income taxes, depreciation and amortization			$ 40.0
Maximum [Member]
Debt Instrument [Line Items]
LIBOR margin rate	0.90%
Commitment fee annual rate	0.90%
Commitment fee, annual rate applied to amount not borrowed	0.15%

X

- Definition

The percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

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

X

- Definition

Amount borrowed under the credit facility as of the balance sheet date.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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

X

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

-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.



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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

X

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Consolidated earnings before interest, income taxes, depreciation and amortization.

+ References

No definition available.

+ Details

Name:	wdfc_ConsolidatedEarningsBeforeInterestIncomeTaxesDepreciationAndAmortization
Namespace Prefix:	wdfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Line Of Credit Facility Borrowings Increase

+ References

No definition available.

+ Details

Name:	wdfc_LineOfCreditFacilityBorrowingsIncrease
Namespace Prefix:	wdfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Line of credit facility, maturity period.

+ References

No definition available.

+ Details

Name:	wdfc_LineOfCreditFacilityMaturityPeriod
Namespace Prefix:	wdfc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Outstanding loans and letters of credit maximum amount.

+ References

No definition available.

+ Details

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