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Document and Entity Information - USD ($)
 12 Months Ended
Aug. 31, 2022
Oct. 17, 2022
Feb. 28, 2022
Document And Entity Information [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Amendment Flag false    
Document Period End Date Aug. 31, 2022    
Entity File Number 000-06936    
Entity Registrant Name WD-40 COMPANY    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 95-1797918    
Entity Address, Address Line One 9715 Businesspark Avenue    
Entity Address, City or Town San Diego    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 92131    
City Area Code 619    
Local Phone Number 275-1400    
Title of 12(b) Security Common stock, par value $0.001 per share    
Trading Symbol WDFC    
Security Exchange Name NASDAQ    
Document Fiscal Year Focus 2022    
Document Fiscal Period Focus FY    
Entity Central Index Key 0000105132    
Current Fiscal Year End Date --08-31    
Entity Well-known Seasoned Issuer Yes    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Voluntary Filers No    
ICFR Auditor Attestation Flag true    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 2,857,971,684
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding   13,579,926  
Documents Incorporated by Reference Documents Incorporated by Reference:

The Proxy Statement for the annual meeting of stockholders on December 13, 2022 is incorporated by reference into Part III, Items 10 through 14 of this Annual Report on Form 10-K.

    
Auditor Name PricewaterhouseCoopers LLP    
Auditor Location San Diego, California    
Auditor Firm ID 238