Document and Entity Information	6 Months Ended
	Feb. 11, 2012	Mar. 02, 2012
Document and Entity Information [Abstract]
Entity Registrant Name	AUTOZONE INC
Entity Central Index Key	0000866787
Document Type	10-Q
Document Period End Date	Feb. 11, 2012
Amendment Flag	false
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--08-25
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		38,971,412