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	3 Months Ended		6 Months Ended
	Mar. 01, 2025	Mar. 02, 2024	Mar. 01, 2025	Mar. 02, 2024
Numerator:
Net income attributable to MSC Industrial, as reported	$ 39,314	$ 61,847	$ 85,937	$ 131,197
Denominator:
Weighted-average shares outstanding for basic net income per share	55,793	56,325	55,845	56,377
Effect of dilutive securities (in shares)	58	142	115	218
Weighted-average shares outstanding for diluted net income per share	55,851	56,467	55,960	56,595
Net income per share:
Basic (in usd per share)	$ 0.70	$ 1.10	$ 1.54	$ 2.33
Diluted (in usd per share)	$ 0.70	$ 1.10	$ 1.54	$ 2.32
Potentially dilutive securities (in shares)	204	15	151	8