Document and Entity Information	9 Months Ended
	May 05, 2012	Jun. 08, 2012
Document and Entity Information [Abstract]
Entity Registrant Name	AUTOZONE INC
Entity Central Index Key	0000866787
Document Type	10-Q
Document Period End Date	May 05, 2012
Amendment Flag	false
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--08-25
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		37,433,856