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
	Nov. 30, 2024	Dec. 02, 2023
Numerator:
Net income attributable to MSC Industrial, as reported	$ 46,623	$ 69,350
Denominator:
Weighted-average shares outstanding for basic net income per share	55,897	56,429
Effect of dilutive securities (in shares)	171	294
Weighted-average shares outstanding for diluted net income per share	56,068	56,723
Net income per share:
Basic (in usd per share)	$ 0.83	$ 1.23
Diluted (in usd per share)	$ 0.83	$ 1.22
Potentially dilutive securities (in shares)	98	0