XML 49 R35.htm IDEA: XBRL DOCUMENT
v3.20.4

Marketable Debt Securities - Additional Information (Detail) $ in Millions | 6 Months Ended
--- | ---
Feb. 13, 2021 USD ($)
Marketable Debt Securities |
Available for sale securities debt maturity period range | less than one year to approximately six years
Marketable securities transferred | $ 62.4

X
- Definition The time period allotted for available-for-sale securities to mature. + References No definition available. + Details
Name: | azo_AvailableForSaleSecuritiesDebtMaturityPeriodRange
Namespace Prefix: | azo_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of cash and securities held by third party trustees pursuant to terms of debt instruments or other agreements as of the date of each statement of financial position presented, which can be used by the trustee only to pay the noncurrent portion of specified obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(b)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_AssetsHeldInTrust
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration