General (Policies)	8 Months Ended
May 07, 2022
General
Fiscal Period	Operating results for the twelve and thirty-six weeks ended May 7, 2022 are not necessarily indicative of the results that may be expected for the full fiscal year ending August 27, 2022. Each of the first three quarters of AutoZone’s fiscal year consists of 12 weeks, and the fourth quarter consists of 16 or 17 weeks. The fourth quarters of fiscal 2022 and 2021 each have 16 weeks.
Recent Accounting Pronouncements	Recently Issued Accounting Pronouncements In November 2021, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) 2021-10, Government Assistance (Topic 832) – Disclosures by Business Entities about Government Assistance. The update increases the disclosures for entities receiving governmental assistance for more transparency. ASU 2021-10 is effective for fiscal years beginning after December 15, 2021. Early adoption is permitted. The Company will adopt this standard beginning with its first quarter ending November 19, 2022. The Company is currently evaluating the new guidance to determine the impact the adoption will have on the Company's consolidated financial statements and related disclosures.

Disclosure of accounting policy for determining an entity's fiscal year or other fiscal period. This disclosure may include identification of the fiscal period end-date, the length of the fiscal period, any reporting period lag between the entity and its subsidiaries, or equity investees. If a reporting lag exists, the closing date of the entity having a different period end is generally noted, along with an explanation of the necessity for using different closing dates. Any intervening events that materially affect the entity's financial position or results of operations are generally also disclosed.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=123454820&loc=d3e5291-111683

Name:	us-gaap_FiscalPeriod
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration