Document and Entity Information - shares |
8 Months Ended | |
|---|---|---|
May 04, 2019 |
May 31, 2019 |
|
| Document and Entity Information [Abstract] | ||
| Document Type | 10-Q | |
| Amendment Flag | false | |
| Document Period End Date | May 04, 2019 | |
| Document Fiscal Year Focus | 2019 | |
| Document Fiscal Period Focus | Q3 | |
| Entity Registrant Name | AUTOZONE INC | |
| Entity Central Index Key | 0000866787 | |
| Current Fiscal Year End Date | --08-31 | |
| Entity Filer Category | Large Accelerated Filer | |
| Trading Symbol | AZO | |
| Entity Common Stock, Shares Outstanding | 24,528,705 | |
| Entity Emerging Growth Company | false | |
| Entity Small Business | false |