Document And Entity Information	3 Months Ended
	Nov. 29, 2014	Jan. 02, 2015
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Nov. 29, 2014
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Entity Registrant Name	MSC INDUSTRIAL DIRECT CO INC
Entity Central Index Key	0001003078
Current Fiscal Year End Date	--11-29
Entity Filer Category	Large Accelerated Filer
Class A Common Stock [Member]
Entity Common Stock, Shares Outstanding		48,576,499
Class B Common Stock [Member]
Entity Common Stock, Shares Outstanding		13,295,747