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Net Income Per Share - Computation Of Basic And Diluted Net Income Per Common Share Under Treasury Stock Method (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Aug. 30, 2025
Aug. 31, 2024
Sep. 02, 2023
Earnings Per Share [Abstract]      
Net income attributable to MSC Industrial, as reported $ 199,328 $ 258,594 $ 343,233
Weighted Average Number of Shares Outstanding, Basic (in shares) 55,781 56,257 55,918
Effect of dilutive securities 113 184 292
Weighted-average shares outstanding for diluted net income per share (in shares) 55,894 56,441 56,210
Basic (in USD per share) $ 3.57 $ 4.60 $ 6.14
Diluted (in USD per share) $ 3.57 $ 4.58 $ 6.11
Potentially dilutive securities (in shares) 128 37 0