Retirement Savings Plans - Additional Information (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Aug. 29, 2026 |
Aug. 30, 2025 |
Aug. 31, 2024 |
|
| 401(k) plan | |||
| Defined Contribution Plan Disclosure [Line Items] | |||
| Percentage of company matching retirement savings plan contributions that vest immediately | 100.00% | ||
| Percentage of savings option up to qualified earnings | 25.00% | ||
| Annual contribution by employer towards 401(k) Plan | $ 44.8 | $ 42.7 | $ 39.0 |
| AutoZone Mexico Savings Fund | |||
| Defined Contribution Plan Disclosure [Line Items] | |||
| Percentage of contributes salary | 12.00% | ||
| AutoZone Mexico Savings Fund, contributions | $ 22.2 | $ 17.7 | $ 17.5 |