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. 04, 2023	Feb. 26, 2022	Mar. 04, 2023	Feb. 26, 2022
Numerator:
Net income attributable to MSC Industrial as reported	$ 79,140	$ 69,931	$ 160,454	$ 135,998
Denominator:
Weighted-average shares outstanding for basic net income per share	55,880	55,799	55,885	55,664
Effect of dilutive securities (in shares)	121	172	189	281
Weighted-average shares outstanding for diluted net income per share	56,001	55,971	56,074	55,945
Net income per share:
Basic (in usd per share)	$ 1.42	$ 1.25	$ 2.87	$ 2.44
Diluted (in usd per share)	$ 1.41	$ 1.25	$ 2.86	$ 2.43
Potentially dilutive securities (in shares)	215	364	225	379