XML 80 R64.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Financing - Schedule of Debt (Parenthetical) (Detail) |  | 12 Months Ended
--- | --- | ---
Apr. 18, 2017 | Aug. 25, 2018 | Aug. 26, 2017
Commercial paper, weighted average interest rate of 0% and 1.44% at August 25, 2018 and August 26, 2017, respectively [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Weighted average interest rate of commercial paper |  | 2.29% | 1.44%
7.125% Senior Notes due August 2018, effective interest rate of 7.28% [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate percentage |  | 7.125% | 7.125%
Effective interest rate |  | 7.28% | 7.28%
Debt instrument maturity, month and year |  | 2018-08 | 2018-08
1.625% Senior Notes due April 2019, effective interest rate of 1.77% [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate percentage |  | 1.625% | 1.625%
Effective interest rate |  | 1.77% | 1.77%
Debt instrument maturity, month and year |  | 2019-04 | 2019-04
4.000% Senior Notes due November 2020, effective interest rate of 4.43% [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate percentage |  | 4.00% | 4.00%
Effective interest rate |  | 4.43% | 4.43%
Debt instrument maturity, month and year |  | 2020-11 | 2020-11
2.500% Senior Notes due April 2021, effective interest rate of 2.62% [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate percentage |  | 2.50% | 2.50%
Effective interest rate |  | 2.62% | 2.62%
Debt instrument maturity, month and year |  | 2021-04 | 2021-04
3.700% Senior Notes due April 2022, effective interest rate of 3.85% [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate percentage |  | 3.70% | 3.70%
Effective interest rate |  | 3.85% | 3.85%
Debt instrument maturity, month and year |  | 2022-04 | 2022-04
2.875% Senior Notes due January 2023, effective interest rate of 3.21% [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate percentage |  | 2.875% | 2.875%
Effective interest rate |  | 3.21% | 3.21%
Debt instrument maturity, month and year |  | 2023-01 | 2023-01
3.125% Senior Notes due July 2023, effective interest rate of 3.26% [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate percentage |  | 3.125% | 3.125%
Effective interest rate |  | 3.26% | 3.26%
Debt instrument maturity, month and year |  | 2023-07 | 2023-07
3.250% Senior Notes due April 2025, effective interest rate 3.36% [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate percentage |  | 3.25% | 3.25%
Effective interest rate |  | 3.36% | 3.36%
Debt instrument maturity, month and year |  | 2025-04 | 2025-04
3.125% Senior Notes due April 2026, effective interest rate of 3.28% [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate percentage |  | 3.125% | 3.125%
Effective interest rate |  | 3.28% | 3.28%
Debt instrument maturity, month and year |  | 2026-04 | 2026-04
3.750% Senior Notes due June 2027, effective interest rate of 3.83% [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate percentage | 3.75% | 3.75% | 3.75%
Effective interest rate |  | 3.83% | 3.83%
Debt instrument maturity, month and year | 2027-06 | 2027-06 | 2027-06

X
- Definition Maturity date (by month and year) for debt instrument. + References No definition available. + Details
Name: | azo_DebtInstrumentMaturityMonthAndYear
Namespace Prefix: | azo_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6036836-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average interest rate of long-term debt outstanding calculated at point in time. + References No definition available. + Details
Name: | us-gaap_LongtermDebtWeightedAverageInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_CommercialPaperMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=azo_SeniorNotesEightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=azo_SeniorNotesSixteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=azo_SeniorNotesNineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=azo_SeniorNotesFourteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=azo_SeniorNotesTenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=azo_SeniorNotesElevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=azo_SeniorNotesTwelveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=azo_SeniorNotesFifteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=azo_SeniorNotesSeventeenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=azo_SeniorNotesEighteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |