General	6 Months Ended
Feb. 13, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
General	Note A – General The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles for interim financial information and with instructions to Form 10-Q and Article 10 of Regulation S-X of the Securities and Exchange Commission’s (the “SEC”) rules and regulations. Accordingly, they do not include all of the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments, including normal recurring accruals, considered necessary for a fair presentation have been included. For further information, refer to the consolidated financial statements and related notes included in the AutoZone, Inc. (“AutoZone” or the “Company”) Annual Report on Form 10-K for the year ended August 29, 2015. Operating results for the twelve and twenty-four weeks ended February 13, 2016 are not necessarily indicative of the results that may be expected for the fiscal year ending August 27, 2016. 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 for fiscal 2016 and 2015 each have 16 weeks. Additionally, the Company’s business is somewhat seasonal in nature, with the highest sales generally occurring during the months of February through September and the lowest sales generally occurring in the months of December and January. Recently Adopted Accounting Pronouncements: In November 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2015-17, Income Taxes – Balance Sheet Classification of Deferred Taxes (Topic 740). ASU 2015-17 requires all deferred tax liabilities and assets to be presented in the balance sheet as noncurrent. The Company early adopted this standard prospectively during the quarter ended February 13, 2016. The adoption of this standard resulted in the reclassification of $3.5 million from current Deferred income tax assets in the Consolidated Balance Sheet as of February 13, 2016 to noncurrent Deferred income tax assets and $251.2 million from current Deferred income tax liabilities to noncurrent Deferred income tax liabilities. No prior periods were retrospectively adjusted. Recently Issued Accounting Pronouncements: In September 2015, the FASB issued ASU 2015-16, Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments. ASU 2015-16 requires an acquirer to recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined, including the cumulative effect of the change in provisional amount, as if the accounting had been completed at the acquisition date. The Company does not expect the provision of ASU 2015-16 to have a material impact on its consolidated financial statements. This update will be effective for the Company beginning with its fiscal 2017 first quarter. In January 2016, the FASB issued ASU 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. ASU 2016-01 requires that all financial assets and liabilities not accounted for under the equity method to be measured at fair value with the changes in fair value recognized in net income. The amendments in this update also require an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments. In addition, the amendments in this update supersede the requirement to disclose the methods and significant assumptions used in calculating the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet for public business entities. The Company can early adopt the provision requiring it to recognize in other comprehensive income the fair value change from instrument-specific credit risk measured using the fair value option for financial instruments. Except for this early application guidance, early adoption is not permitted. The Company is still evaluating the effects that the provision of ASU 2016-01 will have on its consolidated financial statements. This update will be effective for the Company beginning with its fiscal 2019 first quarter. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). ASU 2016-02 requires an entity to recognize a right-of-use asset and lease liability for all leases with terms of more than 12 months. Recognition, measurement and presentation of expenses will depend on classification as a finance or operating lease. The amendments also require certain quantitative and qualitative disclosures about leasing arrangements. Early adoption is permitted. The updated guidance requires a modified retrospective adoption. The Company is still evaluating the effects that the provision of ASU 2016-02 will have on its consolidated financial statements. This update will be effective for the Company beginning with its fiscal 2020 first quarter.

Note A – General

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles for interim financial information and with instructions to Form 10-Q and Article 10 of Regulation S-X of the Securities and Exchange Commission’s (the “SEC”) rules and regulations. Accordingly, they do not include all of the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments, including normal recurring accruals, considered necessary for a fair presentation have been included. For further information, refer to the consolidated financial statements and related notes included in the AutoZone, Inc. (“AutoZone” or the “Company”) Annual Report on Form 10-K for the year ended August 29, 2015.

Operating results for the twelve and twenty-four weeks ended February 13, 2016 are not necessarily indicative of the results that may be expected for the fiscal year ending August 27, 2016. 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 for fiscal 2016 and 2015 each have 16 weeks. Additionally, the Company’s business is somewhat seasonal in nature, with the highest sales generally occurring during the months of February through September and the lowest sales generally occurring in the months of December and January.

Recently Adopted Accounting Pronouncements: In November 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2015-17, Income Taxes – Balance Sheet Classification of Deferred Taxes (Topic 740). ASU 2015-17 requires all deferred tax liabilities and assets to be presented in the balance sheet as noncurrent. The Company early adopted this standard prospectively during the quarter ended February 13, 2016. The adoption of this standard resulted in the reclassification of $3.5 million from current Deferred income tax assets in the Consolidated Balance Sheet as of February 13, 2016 to noncurrent Deferred income tax assets and $251.2 million from current Deferred income tax liabilities to noncurrent Deferred income tax liabilities. No prior periods were retrospectively adjusted.

Recently Issued Accounting Pronouncements: In September 2015, the FASB issued ASU 2015-16, Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments. ASU 2015-16 requires an acquirer to recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined, including the cumulative effect of the change in provisional amount, as if the accounting had been completed at the acquisition date. The Company does not expect the provision of ASU 2015-16 to have a material impact on its consolidated financial statements. This update will be effective for the Company beginning with its fiscal 2017 first quarter.

In January 2016, the FASB issued ASU 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. ASU 2016-01 requires that all financial assets and liabilities not accounted for under the equity method to be measured at fair value with the changes in fair value recognized in net income. The amendments in this update also require an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments. In addition, the amendments in this update supersede the requirement to disclose the methods and significant assumptions used in calculating the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet for public business entities. The Company can early adopt the provision requiring it to recognize in other comprehensive income the fair value change from instrument-specific credit risk measured using the fair value option for financial instruments. Except for this early application guidance, early adoption is not permitted. The Company is still evaluating the effects that the provision of ASU 2016-01 will have on its consolidated financial statements. This update will be effective for the Company beginning with its fiscal 2019 first quarter.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). ASU 2016-02 requires an entity to recognize a right-of-use asset and lease liability for all leases with terms of more than 12 months. Recognition, measurement and presentation of expenses will depend on classification as a finance or operating lease. The amendments also require certain quantitative and qualitative disclosures about leasing arrangements. Early adoption is permitted. The updated guidance requires a modified retrospective adoption. The Company is still evaluating the effects that the provision of ASU 2016-02 will have on its consolidated financial statements. This update will be effective for the Company beginning with its fiscal 2020 first quarter.