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Cover - USD ($)
 12 Months Ended
Aug. 31, 2023
Oct. 16, 2023
Feb. 28, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Aug. 31, 2023    
Current Fiscal Year End Date --08-31    
Document Transition Report false    
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    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 2,341,691,922
Entity Common Stock, Shares Outstanding   13,556,684  
Documents Incorporated by Reference
Documents Incorporated by Reference:
The Proxy Statement for the annual meeting of stockholders on December 12, 2023 is incorporated by reference into Part III, Items 10 through 14 of this Annual Report on Form 10-K.
    
Entity Central Index Key 0000105132    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Amendment Flag false