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Cover - USD ($)
 12 Months Ended
Sep. 02, 2023
Oct. 06, 2023
Mar. 03, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Sep. 02, 2023    
Current Fiscal Year End Date --09-02    
Document Transition Report false    
Entity File Number 1-14130    
Entity Registrant Name MSC INDUSTRIAL DIRECT CO., INC.    
Entity Incorporation, State or Country Code NY    
Entity Tax Identification Number 11-3289165    
Entity Address, Address Line One 515 Broadhollow Road    
Entity Address, City or Town Suite 1000, Melville    
Entity Address, State or Province NY    
Entity Address, Postal Zip Code 11747    
City Area Code 516    
Local Phone Number 812-2000    
Title of 12(b) Security Class A Common Stock, par value $0.001 per share    
Trading Symbol MSM    
Security Exchange Name NYSE    
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    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 3,944,227,738
Entity Common Stock, Shares Outstanding   57,241,468  
Documents Incorporated by Reference [Text Block] DOCUMENTS INCORPORATED BY REFERENCEPortions of the registrant’s definitive proxy statement to be filed with the United States Securities and Exchange Commission in connection with the registrant’s 2024 Annual Meeting of Shareholders are incorporated by reference into Part III of this Annual Report on Form 10-K to the extent described herein.    
Entity Central Index Key 0001003078    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Amendment Flag false    
Auditor Name Ernst & Young LLP    
Auditor Location Jericho, New York    
Auditor Firm ID 42