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
	Dec. 03, 2022	Nov. 27, 2021
Net Income Per Share [Abstract]
Net income attributable to MSC Industrial as reported	$ 81,314	$ 66,067
Weighted-average shares outstanding for basic net income per share	55,891	55,530
Effect of dilutive securities	190	326
Weighted-average shares outstanding for diluted net income per share	56,081	55,856
Basic	$ 1.45	$ 1.19
Diluted	$ 1.45	$ 1.18
Potentially dilutive securities	499	434