Cover Page - shares	3 Months Ended
	Nov. 23, 2019	Dec. 13, 2019
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Nov. 23, 2019
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Entity Registrant Name	AUTOZONE INC
Entity Central Index Key	0000866787
Current Fiscal Year End Date	--08-29
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Trading Symbol	AZO
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
Title of 12(b) Security	Common Stock
Security Exchange Name	NYSE
Entity Address, State or Province	TN
Entity Common Stock, Shares Outstanding		23,592,711
City Area Code	901
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	1-10714
Local Phone Number	495-6500
Entity Address, Postal Zip Code	38103
Entity Tax Identification Number	62-1482048
Entity Address, Address Line One	123 South Front Street
Entity Address, City or Town	Memphis
Entity Incorporation, State or Country Code	NV