Consolidated Statements Of Shareholders' Equity - USD ($) $ in Thousands	Total	Total Shareholders’ Equity Attributable to MSC Industrial	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock	Noncontrolling Interest	Class A Common Stock	Class A Common Stock Common Stock	Class A Common Stock Retained Earnings Regular Dividends	Class A Common Stock Retained Earnings Special Dividends	Class A Common Stock Treasury Stock	Class B Common Stock	Class B Common Stock Common Stock	Class B Common Stock Retained Earnings Regular Dividends	Class B Common Stock Retained Earnings Special Dividends
Beginning Balance at Aug. 29, 2020			$ 690,739	$ 749,515	$ (21,418)	$ (103,948)	$ 5,628		$ 47					$ 10
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exchange of Class B Common Stock for Class A Common Stock									1					(1)
Associate Incentive Plans									0
Repurchase and retirement of Class A Common Stock			(123)	(67,343)					0
Dividends declared on Common Stock										$ (140,296)	$ (163,511)				$ (27,003)	$ (31,840)
Dividend equivalents declared, net of cancellations				(4,114)
Associate Incentive Plans			50,251
Foreign Currency Translation Adjustment	$ 3,852				3,434		418
Repurchase of Class A Common Stock												$ (3,795)
Issuance of Noncontrolling Interest							3,825
Capital Contributions							100
Net (Loss) Income	216,907			216,907			1,030
Associate Incentive Plans						3,359
Ending Balance at Aug. 28, 2021	1,161,872	$ 1,150,871	740,867	532,315	(17,984)	(104,384)	11,001		48					9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per Common Share (in USD per share)								$ 6.50					$ 6.50
Exchange of Class B Common Stock for Class A Common Stock									0					0
Associate Incentive Plans									0
Repurchase and retirement of Class A Common Stock			(50)	(22,076)					0
Dividends declared on Common Stock										(141,414)	0				(25,962)	0
Dividend equivalents declared, net of cancellations				(1,357)
Associate Incentive Plans			57,591
Foreign Currency Translation Adjustment	(4,985)				(5,137)		152
Repurchase of Class A Common Stock												(5,233)
Issuance of Noncontrolling Interest							0
Capital Contributions							0
Net (Loss) Income	339,786			339,786			696
Associate Incentive Plans						3,415
Ending Balance at Sep. 03, 2022	1,362,283	1,350,434	798,408	681,292	(23,121)	(106,202)	11,849		48					9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per Common Share (in USD per share)								3.00					3.00
Exchange of Class B Common Stock for Class A Common Stock									0					0
Associate Incentive Plans									1
Repurchase and retirement of Class A Common Stock			(163)	(90,849)					(1)
Dividends declared on Common Stock										$ (149,368)	$ 0				$ (27,347)	$ 0
Dividend equivalents declared, net of cancellations				(1,954)
Associate Incentive Plans			51,257
Foreign Currency Translation Adjustment	7,091				5,396		1,695
Repurchase of Class A Common Stock												$ (4,766)
Issuance of Noncontrolling Interest							0
Capital Contributions							0
Net (Loss) Income	343,233			343,233			(126)
Associate Incentive Plans						3,291
Ending Balance at Sep. 02, 2023	$ 1,492,582	$ 1,479,164	$ 849,502	$ 755,007	$ (17,725)	$ (107,677)	$ 13,418		$ 48					$ 9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per Common Share (in USD per share)								$ 3.16					$ 3.16