10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

x Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the quarterly period ended May 10, 2014, or

¨ Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the transition period from                  to                 .

Commission file number 1-10714

AUTOZONE, INC.

(Exact name of registrant as specified in its charter)

Nevada	62-1482048
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

123 South Front Street, Memphis, Tennessee	38103
(Address of principal executive offices)	(Zip Code)

(901) 495-6500

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter periods that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No   ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer	x	Accelerated filer	¨
Non-accelerated filer	¨	Smaller reporting company	¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  x

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

Common Stock, $.01 Par Value – 32,600,155 shares outstanding as of June 13, 2014.

TABLE OF CONTENTS

		Page
PART I.	FINANCIAL INFORMATION	3
Item 1.	Financial Statements	3
	CONDENSED CONSOLIDATED BALANCE SHEETS	3
	CONDENSED CONSOLIDATED STATEMENTS OF INCOME	4
	CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME	5
	CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS	6
	NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS	7
	REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM	15
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	16
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	22
Item 4.	Controls and Procedures	22
Item 4T.	Controls and Procedures	23
PART II.	OTHER INFORMATION	23
Item 1.	Legal Proceedings	23
Item 1A.	Risk Factors	23
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	23
Item 3.	Defaults Upon Senior Securities	23
Item 4.	Mine Safety Disclosures	23
Item 5.	Other Information	23
Item 6.	Exhibits	24
SIGNATURES		25
EXHIBIT INDEX		26

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PART I. FINANCIAL INFORMATION

Item 1. Financial Statements.

AUTOZONE, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

(in thousands)	May 10, 2014			August 31, 2013
Assets
Current assets:
Cash and cash equivalents	$	145,349		$	142,191
Accounts receivable		190,848			171,638
Merchandise inventories		3,133,350			2,861,014
Other current assets		112,047			101,443
Deferred income taxes		6,250			1,727
Total current assets		3,587,844			3,278,013
Property and equipment:
Property and equipment		5,322,299			5,058,525
Less: Accumulated depreciation and amortization		(2,129,010	)		(1,987,164	)
		3,193,289			3,071,361
Goodwill		367,829			367,829
Deferred income taxes		17,282			4,069
Other long-term assets		205,558			170,817
		590,669			542,715
	$	7,371,802		$	6,892,089
Liabilities and Stockholders’ Deficit
Current liabilities:
Accounts payable	$	3,574,921		$	3,307,535
Accrued expenses and other		470,719			467,831
Income taxes payable		141,801			17,129
Deferred income taxes		201,355			202,922
Short-term borrowings		215,156			173,733
Total current liabilities		4,603,952			4,169,150
Long-term debt		4,163,244			4,013,267
Other long-term liabilities		412,836			396,991
Commitments and contingencies		—			—
Stockholders’ deficit:
Preferred stock, authorized 1,000 shares; no shares issued		—			—
Common stock, par value $.01 per share, authorized 200,000 shares; 33,811 shares issued and 32,613 shares outstanding as of May 10, 2014; 36,768 shares issued and 34,293 shares outstanding as of August 31, 2013		338			368
Additional paid-in capital		819,902			814,457
Retained deficit		(1,902,793	)		(1,378,936	)
Accumulated other comprehensive loss		(105,677	)		(120,788	)
Treasury stock, at cost		(620,000	)		(1,002,420	)
Total stockholders’ deficit		(1,808,230	)		(1,687,319	)
	$	7,371,802		$	6,892,089

See Notes to Condensed Consolidated Financial Statements.

3

AUTOZONE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(Unaudited)

	Twelve Weeks Ended				Thirty-Six Weeks Ended
(in thousands, except per share data)	May 10, 2014		May 4, 2013		May 10, 2014		May 4, 2013
Net sales	$	2,341,545	$	2,205,878	$	6,425,617	$	6,052,116
Cost of sales, including warehouse and delivery expenses		1,124,587		1,063,165		3,085,927		2,915,556
Gross profit		1,216,958		1,142,713		3,339,690		3,136,560
Operating, selling, general and administrative expenses		738,006		686,683		2,139,668		1,999,682
Operating profit		478,952		456,030		1,200,022		1,136,878
Interest expense, net		36,162		42,091		118,083		124,519
Income before income taxes		442,790		413,939		1,081,939		1,012,359
Income taxes		157,633		148,356		385,865		367,078
Net income	$	285,157	$	265,583	$	696,074	$	645,281
Weighted average shares for basic earnings per share		33,073		35,922		33,610		36,342
Effect of dilutive stock equivalents		643		607		607		666
Weighted average shares for diluted earnings per share		33,716		36,529		34,217		37,008
Basic earnings per share	$	8.62	$	7.39	$	20.71	$	17.76
Diluted earnings per share	$	8.46	$	7.27	$	20.34	$	17.44

See Notes to Condensed Consolidated Financial Statements.

4

AUTOZONE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)

	Twelve Weeks Ended					Thirty-Six Weeks Ended
(in thousands)	May 10, 2014			May 4, 2013		May 10, 2014		May 4, 2013
Net income	$	285,157		$	265,583	$	696,074	$	645,281
Other comprehensive income:
Pension liability adjustments, net of taxes (1)		957			2,038		2,864		5,510
Foreign currency translation adjustments		13,700			17,121		12,011		30,382
Unrealized (losses) gains on marketable securities, net of taxes (2)		(13	)		12		158		(44	)
Net derivative activities, net of taxes (3)		25			255		78		683
Total other comprehensive income		14,669			19,426		15,111		36,531
Comprehensive income	$	299,826		$	285,009	$	711,185	$	681,812

(1) Pension liability adjustments are presented net of taxes of $630 in fiscal 2014 and $1,296 in fiscal 2013 for the twelve weeks ended and $1,898 in fiscal 2014 and $4,489 in fiscal 2013 for the thirty-six weeks ended

(2) Unrealized (losses) gains on marketable securities are presented net of taxes of $7 in fiscal 2014 and $7 in fiscal 2013 for the twelve weeks ended and $85 in fiscal 2014 and $24 in fiscal 2013 for the thirty-six weeks ended

(3) Net derivative activities are presented net of taxes of $17 in fiscal 2014 and $150 in fiscal 2013 for the twelve weeks ended and $48 in fiscal 2014 and $408 in fiscal 2013 for the thirty-six weeks ended

See Notes to Condensed Consolidated Financial Statements.

5

AUTOZONE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

	Thirty-Six Weeks Ended
(in thousands)	May 10, 2014			May 4, 2013
Cash flows from operating activities:
Net income	$	696,074		$	645,281
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of property and equipment and intangibles		172,286			155,932
Amortization of debt origination fees		4,895			5,857
Income tax benefit from exercise of stock options		(18,296	)		(53,508	)
Deferred income taxes		(21,234	)		(16,296	)
Share-based compensation expense		28,985			25,632
Changes in operating assets and liabilities:
Accounts receivable		(17,757	)		9,151
Merchandise inventories		(267,801	)		(155,059	)
Accounts payable and accrued expenses		240,156			156,205
Income taxes payable		142,925			99,626
Other, net		10,885			23,043
Net cash provided by operating activities		971,118			895,864
Cash flows from investing activities:
Capital expenditures		(261,724	)		(258,855	)
Acquisition of business		—			(116,084	)
Purchase of intangibles		(11,112	)		—
Purchase of marketable securities		(28,616	)		(26,808	)
Proceeds from sale of marketable securities		25,013			20,290
Disposal of capital assets and other, net		1,471			7,350
Net cash used in investing activities		(274,968	)		(374,107	)
Cash flows from financing activities:
Net proceeds (payments) of commercial paper		291,400			(262,300	)
Net payments of short-term borrowings		—			(4,945	)
Proceeds from issuance of debt		400,000			800,000
Repayment of debt		(500,000	)		(300,000	)
Net proceeds from sale of common stock		34,412			82,817
Purchase of treasury stock		(911,537	)		(827,348	)
Income tax benefit from exercise of stock options		18,296			53,508
Payments of capital lease obligations		(24,248	)		(19,824	)
Other, net		(2,294	)		(14,720	)
Net cash used in financing activities		(693,971	)		(492,812	)
Effect of exchange rate changes on cash		979			1,647
Net increase in cash and cash equivalents		3,158			30,592
Cash and cash equivalents at beginning of period		142,191			103,093
Cash and cash equivalents at end of period	$	145,349		$	133,685

See Notes to Condensed Consolidated Financial Statements.

6

AUTOZONE, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

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 31, 2013.

Operating results for the twelve and thirty-six weeks ended May 10, 2014, are not necessarily indicative of the results that may be expected for the fiscal year ending August 30, 2014. 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 quarter for fiscal 2014 has 16 weeks and for fiscal 2013 had 17 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 July 2012, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2012-02, Testing Indefinite-Lived Intangible Assets for Impairment. The purpose of ASU 2012-02 is to simplify how an entity tests for impairment of indefinite-lived intangible assets. Entities will assess qualitative factors to determine whether it is more likely than not that a long-lived intangible asset’s fair value is less than its carrying value. In instances where the fair value is determined to be less than the carrying value, entities will perform the two-step quantitative goodwill impairment test. The Company adopted this standard effective September 1, 2013, and it had no material impact on the consolidated financial statements.

In February 2013, the FASB issued ASU 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. Under ASU 2013-02, an entity is required to provide information about the amounts reclassified out of accumulated other comprehensive income (“AOCI”) by component. In addition, an entity is required to present, either on the face of the financial statements or in the notes, significant amounts reclassified out of AOCI by the respective line items of net income, but only if the amount reclassified is required to be reclassified in its entirety in the same reporting period. For amounts that are not required to be reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures that provide additional details about those amounts. ASU 2013-02 does not change the current requirements for reporting net income or other comprehensive income in the financial statements. The Company adopted this standard effective September 1, 2013, and it had no material impact on the consolidated financial statements.

Recently Issued Accounting Pronouncements: In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers. Under ASU 2014-09, an entity will recognize revenue when it transfers promised goods or services to customers in an amount that reflects what it expects in exchange for the goods or services. It also requires more detailed disclosures to enable users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The Company does not expect the provision of ASU 2014-09 to have a material impact on its consolidated financial statements. This update will be effective for the Company at the beginning of its fiscal 2018 year.

Note B – Share-Based Payments

AutoZone recognizes compensation expense for share-based payments based on the fair value of the awards at the grant date. Share-based payments include stock option grants, restricted stock grants, restricted stock unit grants and the discount on shares sold to employees under share purchase plans. Additionally, directors’ fees are paid in restricted stock units with value equivalent to the value of shares of common stock as of the grant date. The change in fair value of liability-based stock awards is also recognized in share-based compensation expense.

Total share-based compensation expense (a component of Operating, selling, general and administrative expenses) was $8.3 million for the twelve week period ended May 10, 2014, and was $9.0 million for the comparable prior year period. Share-based compensation expense was $29.0 million for the thirty-six week period ended May 10, 2014, and was $25.6 million for the comparable prior year period.

During the thirty-six week period ended May 10, 2014, 194,130 shares of stock options were exercised at a weighted average exercise price of $177.95. In the comparable prior year period, 638,553 shares of stock options were exercised at a weighted average exercise price of $129.50.

The Company made stock option grants of 347,615 shares during the thirty-six week period ended May 10, 2014, and granted options to purchase 364,160 shares during the comparable prior year period. The weighted average fair value of the stock option awards

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granted during the thirty-six week periods ended May 10, 2014, and May 4, 2013, using the Black-Scholes-Merton multiple-option pricing valuation model, was $96.92 and $98.58 per share, respectively, using the following weighted average key assumptions:

	Thirty-Six Weeks Ended
	May 10, 2014			May 4, 2013
Expected price volatility		23	%		29	%
Risk-free interest rate		1.0	%		0.5	%
Weighted average expected lives (in years)		5.2			5.2
Forfeiture rate		9	%		10	%
Dividend yield		0	%		0	%

See AutoZone’s Annual Report on Form 10-K for the year ended August 31, 2013, for a discussion regarding the methodology used in developing AutoZone’s assumptions to determine the fair value of the option awards and a description of AutoZone’s 2011 Equity Incentive Award Plan and the 2011 Director Compensation Program.

For the twelve week period ended May 10, 2014, no stock options were excluded from the diluted earnings per share computation because they would have been anti-dilutive. For the comparable prior year period, 8,600 anti-dilutive shares were excluded from the dilutive earnings per share computation. No stock options were excluded from the diluted earnings per share computation for the thirty-six week period ended May 10, 2014, and 29,600 anti-dilutive shares were excluded for the comparable prior year period.

During the second quarter of fiscal 2014, the Company adopted the 2014 Director Compensation Program (the “Program”), which states that non-employee directors will receive their compensation in awards of restricted stock units under the 2011 Equity Incentive Award Plan, with an option for a certain portion of a director’s compensation to be paid in cash at the non-employee director’s election. The Program replaces the former 2011 Director Compensation Program. Under the Program, restricted stock units are granted January 1 of each year (the “Grant Date”). The number of restricted stock units is determined by dividing the amount of the annual retainer by the fair market value of the shares of common stock as of the Grant Date. The restricted stock units are fully vested on January 1 of each year and are paid in shares of the Company’s common stock on the earlier to occur of the fifth anniversary of the Grant Date or the date the non-employee director ceases to be a member of the Board (“Separation from Service”). Non-employee directors may elect to defer receipt of the restricted stock units until their Separation from Service. The cash portion of the award, if elected, is paid ratably over the remaining calendar quarters.

Note C – Fair Value Measurements

The Company defines fair value as the price received to transfer an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The Company uses a hierarchy of valuation inputs to measure fair value.

The hierarchy prioritizes the inputs into three broad levels:

Level 1 inputs—unadjusted quoted prices in active markets for identical assets or liabilities that the Company has the ability to access. An active market for the asset or liability is one in which transactions for the asset or liability occur with sufficient frequency and volume to provide ongoing pricing information.

Level 2 inputs—inputs other than quoted market prices included in Level 1 that are observable, either directly or indirectly, for the asset or liability. Level 2 inputs include, but are not limited to, quoted prices for similar assets or liabilities in an active market, quoted prices for identical or similar assets or liabilities in markets that are not active and inputs other than quoted market prices that are observable for the asset or liability, such as interest rate curves and yield curves observable at commonly quoted intervals, volatilities, credit risk and default rates.

Level 3 inputs—unobservable inputs for the asset or liability.

Financial Assets & Liabilities Measured at Fair Value on a Recurring Basis

The Company’s assets and liabilities measured at fair value on a recurring basis were as follows:

	May 10, 2014
(in thousands)	Level 1		Level 2		Level 3		Fair Value
Other current assets	$	17,678	$	39	$	—	$	17,717
Other long-term assets		50,328		17,962		—		68,290
	$	68,006	$	18,001	$	—	$	86,007

	August 31, 2013
(in thousands)	Level 1		Level 2		Level 3		Fair Value
Other current assets	$	16,386	$	24	$	—	$	16,410
Other long-term assets		49,011		16,740		—		65,751
	$	65,397	$	16,764	$	—	$	82,161

At May 10, 2014, the fair value measurement amounts for assets and liabilities recorded in the accompanying Condensed Consolidated Balance Sheet consisted of short-term marketable securities of $17.7 million, which are included within Other current assets, and long-term marketable securities of $68.3 million, which are included in Other long-term assets. The Company’s marketable securities are typically

8

valued at the closing price in the principal active market as of the last business day of the quarter or through the use of other market inputs relating to the securities, including benchmark yields and reported trades. The fair values of the marketable securities, by asset class, are described in “Note D – Marketable Securities.”

Non-Financial Assets measured at Fair Value on a Non-Recurring Basis

Non-financial assets are required to be measured at fair value on a non-recurring basis in certain circumstances, including the event of impairment. The assets could include assets acquired in an acquisition as well as property, plant and equipment that are determined to be impaired. During the thirty-six week periods ended May 10, 2014 and May 4, 2013, the Company did not have any significant non-financial assets measured at fair value on a non-recurring basis in periods subsequent to initial recognition.

Financial Instruments not Recognized at Fair Value

The Company has financial instruments, including cash and cash equivalents, accounts receivable, other current assets and accounts payable. The carrying amounts of these financial instruments approximate fair value because of their short maturities. A discussion of the carrying values and fair values of the Company’s debt is included in “Note H – Financing.”

Note D – Marketable Securities

The Company’s basis for determining the cost of a security sold is the “Specific Identification Model.” Unrealized gains (losses) on marketable securities are recorded in Accumulated other comprehensive loss. The Company’s available-for-sale marketable securities consisted of the following:

	May 10, 2014
(in thousands)	Amortized Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate securities	$	27,164	$	176	$	(5	)	$	27,335
Government bonds		26,424		36		(3	)		26,457
Mortgage-backed securities		6,113		28		(83	)		6,058
Asset-backed securities and other		26,101		56		—			26,157
	$	85,802	$	296	$	(91	)	$	86,007

	August 31, 2013
(in thousands)	Amortized Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate securities	$	27,803	$	148	$	(67	)	$	27,884
Government bonds		21,372		18		(67	)		21,323
Mortgage-backed securities		7,198		24		(138	)		7,084
Asset-backed securities and other		25,825		50		(5	)		25,870
	$	82,198	$	240	$	(277	)	$	82,161

The debt securities held at May 10, 2014, had effective maturities ranging from less than one year to approximately 3 years. The Company did not realize any material gains or losses on its marketable securities during the thirty-six week period ended May 10, 2014.

The Company holds 12 securities that are in an unrealized loss position of approximately $91 thousand at May 10, 2014. The Company has the intent and ability to hold these investments until recovery of fair value or maturity, and does not deem the investments to be impaired on an other than temporary basis. In evaluating whether the securities are deemed to be impaired on an other than temporary basis, the Company considers factors such as the duration and severity of the loss position, the credit worthiness of the investee, the term to maturity and the intent and ability to hold the investments until maturity or until recovery of fair value.

During the twelve week period ended February 15, 2014, the Company’s insurance captive transferred $28.2 million of its marketable securities to a trust account to secure its obligations to an insurance company related to future workers compensation and casualty losses. These securities held by the trust account are included above in total marketable securities.

Note E – Derivative Financial Instruments

At May 10, 2014, the Company had $11.7 million recorded in Accumulated other comprehensive loss related to realized losses associated with terminated interest rate swap and treasury rate lock derivatives which were designated as hedging instruments. Net losses are amortized into Interest expense over the remaining life of the associated debt. During the twelve week period ended May 10, 2014, the Company reclassified $42 thousand of net losses from Accumulated other comprehensive loss to Interest expense. In the comparable prior year period, the Company reclassified $405 thousand from Accumulated other comprehensive loss to Interest expense. During the thirty-six week period ended May 10, 2014, the Company reclassified $126 thousand of net losses from Accumulated other comprehensive loss to Interest expense. In the comparable prior year period, the Company reclassified $1.2 million of net losses from Accumulated other comprehensive loss to Interest expense. The Company expects to reclassify $182 thousand of net losses from Accumulated other comprehensive loss to Interest expense over the next twelve months.

9

Note F – Merchandise Inventories

Inventories are stated at the lower of cost or market using the last-in, first-out (“LIFO”) method for domestic inventories and the first-in, first-out (“FIFO”) method for Mexico inventories. Included in inventories are related purchasing, storage and handling costs. Due to price deflation on the Company’s merchandise purchases, the Company’s domestic inventory balances are effectively maintained under the FIFO method. The Company’s policy is not to write up inventory in excess of replacement cost. The cumulative balance of this unrecorded adjustment, which will be reduced upon experiencing price inflation on the Company’s merchandise purchases, was $307.0 million at May 10, 2014, and $283.7 million at August 31, 2013.

Note G – Pension and Savings Plans

The components of net periodic pension expense related to the Company’s pension plans consisted of the following:

	Twelve Weeks Ended						Thirty-Six Weeks Ended
(in thousands)	May 10, 2014			May 4, 2013			May 10, 2014			May 4, 2013
Interest cost	$	3,016		$	2,659		$	9,048		$	7,977
Expected return on plan assets		(3,550	)		(3,083	)		(10,650	)		(9,249	)
Amortization of net loss		1,587			3,333			4,761			9,999
Net periodic pension expense	$	1,053		$	2,909		$	3,159		$	8,727

The Company makes contributions in amounts at least equal to the minimum funding requirements of the Employee Retirement Income Security Act of 1974, as amended by the Pension Protection Act of 2006. During the thirty-six week period ended May 10, 2014, the Company made contributions to its funded plan in the amount of $2.9 million. The Company expects to contribute approximately $13.8 million to the plan during the remainder of fiscal 2014; however, a change to the expected cash funding may be impacted by a change in interest rates or a change in the actual or expected return on plan assets.

Note H – Financing

The Company’s long-term debt consisted of the following:

(in thousands)	May 10, 2014		August 31, 2013
6.500% Senior Notes due January 2014, effective interest rate of 6.63%	$	—	$	500,000
5.750% Senior Notes due January 2015, effective interest rate of 5.89%		500,000		500,000
5.500% Senior Notes due November 2015, effective interest rate of 4.86%		300,000		300,000
6.950% Senior Notes due June 2016, effective interest rate of 7.09%		200,000		200,000
1.300% Senior Notes due January 2017, effective interest rate of 1.43%		400,000		—
7.125% Senior Notes due August 2018, effective interest rate of 7.28%		250,000		250,000
4.000% Senior Notes due November 2020, effective interest rate of 4.43%		500,000		500,000
3.700% Senior Notes due April 2022, effective interest rate of 3.85%		500,000		500,000
2.875% Senior Notes due January 2023, effective interest rate of 3.21%		300,000		300,000
3.125% Senior Notes due July 2023, effective interest rate of 3.26%		500,000		500,000
Commercial paper, weighted average interest rate of 0.26% and 0.29% at May 10, 2014 and August 31, 2013, respectively		928,400		637,000
Total debt		4,378,400		4,187,000
Less: Short-term borrowings		215,156		173,733
Long-term debt	$	4,163,244	$	4,013,267

As of May 10, 2014, $928.4 million of commercial paper borrowings and $284.8 million of the 5.750% Senior Notes due January 2015 are classified as long-term in the accompanying Consolidated Balance Sheets as the Company has the ability and intent to refinance on a long-term basis through available capacity in its revolving credit facility. As of May 10, 2014, the Company had $1.213 billion of availability under its $1.25 billion revolving credit facility, expiring in September 2017, that would allow it to replace these short-term obligations with long-term financing.

On January 14, 2014, the Company issued $400 million in 1.300% Senior Notes due January 2017 under its shelf registration statement filed with the SEC on April 17, 2012 (the “Shelf Registration”). The Shelf Registration allows the Company to sell an indeterminate amount in debt securities to fund general corporate purposes, including repaying, redeeming or repurchasing outstanding debt and for working capital, capital expenditures, new store openings, stock repurchases and acquisitions. Proceeds from the debt issuance on January 14, 2014, were used to repay a portion of the $500 million in 6.500% Senior Notes due January 2014. The Company used commercial paper borrowings to repay the remainder of the 6.500% Senior Notes.

10

On April 29, 2013, the Company issued $500 million in 3.125% Senior Notes due July 2023 under its Shelf Registration. Proceeds from the debt issuance on April 29, 2013, were used to repay a portion of the outstanding commercial paper borrowings, which were used to repay the $200 million in 4.375% Senior Notes due in June 2013, and for general corporate purposes.

On November 13, 2012, the Company issued $300 million in 2.875% Senior Notes due January 2023 under its Shelf Registration. Proceeds from the debt issuance on November 13, 2012, were used to repay a portion of the outstanding commercial paper borrowings, which were used to repay the $300 million in 5.875% Senior Notes due in October 2012, and for general corporate purposes.

In December 2013, the Company amended and restated its revolving credit facility, increasing the capacity under the revolving credit facility to $1.25 billion. This credit facility is available to primarily support commercial paper borrowings, letters of credit and other short-term unsecured bank loans. The capacity of the credit facility may be increased to $1.5 billion prior to the maturity date at the Company’s election and subject to bank credit capacity and approval, may include up to $200 million in letters of credit and may include up to $175 million in capital leases each fiscal year. Under the revolving credit facility, the Company may borrow funds consisting of Eurodollar loans or base rate loans. Interest accrues on Eurodollar loans at a defined Eurodollar rate, defined as LIBOR plus the applicable percentage, as defined in the revolving credit facility, depending upon the Company’s senior, unsecured, (non-credit enhanced) long-term debt rating. Interest accrues on base rate loans as defined in the credit facility. The Company also has the option to borrow funds under the terms of a swingline loan subfacility. The revolving credit facility expires in September 2017.

The fair value of the Company’s debt was estimated at $4.503 billion as of May 10, 2014, and $4.259 billion as of August 31, 2013, based on the quoted market prices for the same or similar issues or on the current rates available to the Company for debt of the same terms (Level 2). Such fair value is greater than the carrying value of debt by $124.9 million at May 10, 2014, and $72.2 million at August 31, 2013.

Note I – Stock Repurchase Program

From January 1, 1998 to May 10, 2014, the Company has repurchased a total of 136.5 million shares at an aggregate cost of $13.843 billion, including 1,876,659 shares of its common stock at an aggregate cost of $911.5 million during thirty-six week period ended May 10, 2014. On December 17, 2013, the Board voted to increase the authorization by $750 million to raise the cumulative share repurchase authorization from $13.4 billion to $14.15 billion. Considering the cumulative repurchases as of May 10, 2014, the Company had $306.9 million remaining under the Board’s authorization to repurchase its common stock.

On June 17, 2014, the Board voted to increase the authorization by $750 million to raise the cumulative share repurchase authorization from $14.15 billion to $14.9 billion. Subsequent to May 10, 2014, the Company has repurchased 84,400 shares of its common stock at an aggregate cost of $44.4 million. Considering the cumulative repurchases and the increase in authorization subsequent to May 10, 2014, the Company has $1.013 billion remaining under the Board’s authorization to repurchase its common stock.

During the thirty-six week period ended May 10, 2014, the Company retired 3.2 million shares of treasury stock which had previously been repurchased under the Company’s share repurchase program. The retirement increased Retained deficit by $1.220 billion and decreased Additional paid-in capital by $74.0 million. During the comparable prior year period, the Company retired 3.9 million shares of treasury stock, which increased Retained deficit by $1.362 billion and decreased Additional paid-in capital by $75.7 million.

Note J – Accumulated Other Comprehensive Loss

Accumulated other comprehensive loss includes certain adjustments to pension liabilities, foreign currency translation adjustments, certain activity for interest rate swaps and treasury rate locks that qualify as cash flow hedges and unrealized gains (losses) on available-for-sale securities. Changes in Accumulated other comprehensive loss for the twelve week periods ended May 10, 2014 and May 4, 2013, consisted of the following:

(in thousands)	Pension Liability			Foreign Currency (3)			Net Unrealized Gain on Securities			Derivatives			Total
Balance at February 15, 2014	$	(48,954	)	$	(64,172	)	$	146		$	(7,366	)	$	(120,346	)
Other comprehensive (loss) income before reclassifications		—			13,700			23			—			13,723
Amounts reclassified from Accumulated other comprehensive loss (1)		957	(2)		—			(36	)(4)		25	(5)		946
Balance at May 10, 2014	$	(47,997	)	$	(50,472	)	$	133		$	(7,341	)	$	(105,677	)

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(in thousands)	Pension Liability			Foreign Currency (3)			Net Unrealized Gain on Securities			Derivatives			Total
Balance at February 9, 2013	$	(90,495	)	$	(37,006	)	$	295		$	(7,702	)	$	(134,908	)
Other comprehensive income (loss) before reclassifications		—			17,121			29			—			17,150
Amounts reclassified from Accumulated other comprehensive loss (1)		2,038	(2)		—			(17	)(4)		255	(5)		2,276
Balance at May 4, 2013	$	(88,457	)	$	(19,885	)	$	307		$	(7,447	)	$	(115,482	)

(1) Amounts in parentheses indicate debits to Accumulated other comprehensive loss.

(2) Represents amortization of pension liability adjustments, net of taxes of $630 for the twelve weeks ended May 10, 2014 and $1,296 for the twelve weeks ended May 4, 2013, which is recorded in Operating, selling, general and administrative expenses on the Condensed Consolidated Statements of Income. See “Note G – Pension and Savings Plans” for further discussion.

(3) Foreign currency is not shown net of additional U.S. tax as earnings of non-U.S. subsidiaries are intended to be permanently reinvested.

(4) Represents realized (losses) gains on marketable securities, net of taxes of $19 for the twelve weeks ended May 10, 2014 and $9 for the twelve weeks ended May 4, 2013, which is recorded in Operating, selling, general, and administrative expenses on the Condensed Consolidated Statements of Income. See “Note D – Marketable Securities” for further discussion.

(5) Represents gains and losses on derivatives, net of taxes of $17 for the twelve weeks ended May 10, 2014 and $150 for the twelve weeks ended May 4, 2013, which is recorded in Interest expense, net, on the Condensed Consolidated Statements of Income. See “Note E – Derivative Financial Instruments” for further discussion.

Changes in Accumulated other comprehensive loss for the thirty-six week periods ended May 10, 2014 and May 4, 2013, consisted of the following:

(in thousands)	Pension Liability			Foreign Currency (3)			Net Unrealized Gain on Securities			Derivatives			Total
Balance at August 31, 2013	$	(50,861	)	$	(62,483	)	$	(25	)	$	(7,419	)	$	(120,788	)
Other comprehensive income (loss) before reclassifications		—			12,011			220			—			12,231
Amounts reclassified from Accumulated other comprehensive loss (1)		2,864	(2)		—			(62	)(4)		78	(5)		2,880
Balance at May 10, 2014	$	(47,997	)	$	(50,472	)	$	133		$	(7,341	)	$	(105,677	)

(in thousands)	Pension Liability			Foreign Currency (3)			Net Unrealized Gain on Securities			Derivatives			Total
Balance at August 25, 2012	$	(93,967	)	$	(50,267	)	$	351		$	(8,130	)	$	(152,013	)
Other comprehensive (loss) income before reclassifications		—			30,382			27			—			30,409
Amounts reclassified from Accumulated other comprehensive loss (1)		5,510	(2)		—			(71	)(4)		683	(5)		6,122
Balance at May 4, 2013	$	(88,457	)	$	(19,885	)	$	307		$	(7,447	)	$	(115,482	)

(1) Amounts in parentheses indicate debits to Accumulated other comprehensive loss.

(2) Represents amortization of pension liability adjustments, net of taxes of $1,898 in fiscal 2014 and $4,489 in fiscal 2013, which is recorded in Operating, selling, general and administrative expenses on the Condensed Consolidated Statements of Income. See “Note G – Pension and Savings Plans” for further discussion.

(3) Foreign currency is not shown net of additional U.S. tax as earnings of non-U.S. subsidiaries are intended to be permanently reinvested.

(4) Represents realized (losses) gains on marketable securities, net of taxes of $33 in fiscal 2014 and $38 in fiscal 2013, which is recorded in Operating, selling, general, and administrative expenses on the Condensed Consolidated Statements of Income. See “Note D – Marketable Securities” for further discussion.

(5) Represents gains and losses on derivatives, net of taxes of $48 in fiscal 2014 and $408 is fiscal 2013, which is recorded in Interest expense, net, on the Condensed Consolidated Statements of Income. See “Note E – Derivative Financial Instruments” for further discussion.

12

Note K – Goodwill and Intangibles

The changes in the carrying amount of goodwill are as follows:

(in thousands)	Auto Parts Stores		Other		Total
Net balance as of August 31, 2013	$	302,645	$	65,184	$	367,829
Goodwill adjustments		—		—		—
Net balance as of May 10, 2014	$	302,645	$	65,184	$	367,829

The Company recorded an increase to intangible assets of $30.2 million during the thirty-six weeks ended May 10, 2014. During fiscal year 2014, the Company purchased the rights to certain customer relationships and technology assets relating to its ALLDATA operations. The carrying amounts of intangible assets are included in Other long-term assets as follows:

(in thousands)	Estimated Useful Life		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Amortizing intangible assets:
Technology		3-5 years	$	10,570	$	(2,841	)	$	7,729
Noncompete agreements		5 years		1,300		(363	)		937
Customer relationships		3-10 years		48,376		(4,121	)		44,255
			$	60,246	$	(7,325	)		52,921
Non-amortizing intangible asset:
Trade name									24,600
Total intangible assets other than goodwill								$	77,521

Amortization expense of intangible assets for the twelve and thirty-six week period ended May 10, 2014, was $2.0 million and $4.4 million, respectively. Amortization expense of intangible assets for the twelve and thirty-six week period ended May 4, 2013, was $0.9 million and $1.5 million, respectively.

Total future amortization expense for intangible assets that have finite lives, based on the existing intangible assets and their current estimated useful lives as of May 10, 2014, is estimated as follows:

(in thousands)	Total
Remainder of fiscal 2014	$	2,652
2015		8,618
2016		8,618
2017		8,353
2018		6,725
Thereafter		17,955
	$	52,921

Note L – Litigation

In 2004, the Company acquired a store site in Mount Ephraim, New Jersey that had previously been the site of a gasoline service station and contained evidence of groundwater contamination. Upon acquisition, the Company voluntarily reported the groundwater contamination issue to the New Jersey Department of Environmental Protection and entered into a Voluntary Remediation Agreement providing for the remediation of the contamination associated with the property. The Company has conducted and paid for (at an immaterial cost to the Company) remediation of contamination on the property. The Company is also investigating, and will be addressing, potential vapor intrusion impacts in downgradient residences and businesses. The New Jersey Department of Environmental Protection has asserted, in a Directive and Notice to Insurers dated February 19, 2013 and again in an Amended Directive and Notice to Insurers dated January 13, 2014 (collectively the “Directives”), that the Company is liable for the downgradient impacts under a joint and severable liability theory. The Company has contested any such assertions due to the existence of other entities/sources of contamination, some of which are named in the Directives, in the area of the property. Pursuant to the Voluntary Remediation Agreement, upon completion of all remediation required by the agreement, the Company believes it should be eligible to be reimbursed up to 75 percent of qualified remediation costs by the State of New Jersey. The Company has asked the state for clarification that the agreement applies to off-site work, and the state is considering the request. Although the aggregate amount of additional costs that the Company may incur pursuant to the remediation cannot currently be ascertained, the Company does not currently believe that fulfillment of its obligations under the agreement or otherwise will result in costs that are material to its financial condition, results of operations or cash flow.

The Company is involved in various other legal proceedings incidental to the conduct of its business, including several lawsuits containing class-action allegations in which the plaintiffs are current and former hourly and salaried employees who allege various wage and hour violations and unlawful termination practices. The Company does not currently believe that, either individually or in the aggregate, these matters will result in liabilities material to the Company’s financial condition, results of operations or cash flows.

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Note M – Segment Reporting

The Company’s three operating segments (Domestic Auto Parts, Mexico, and Brazil) are aggregated as one reportable segment: Auto Parts Stores. The criteria the Company used to identify the reportable segment are primarily the nature of the products the Company sells and the operating results that are regularly reviewed by the Company’s chief operating decision maker to make decisions about the resources to be allocated to the business units and to assess performance. The accounting policies of the Company’s reportable segment are the same as those described in Note A in its Annual Report on Form 10-K for the year ended August 31, 2013.

The Auto Parts Stores segment is a retailer and distributor of automotive parts and accessories through the Company’s 5,279 stores in the United States, Puerto Rico, Mexico, and Brazil. Each store carries an extensive product line for cars, sport utility vehicles, vans and light trucks, including new and remanufactured automotive hard parts, maintenance items, accessories and non-automotive products.

The Other category reflects business activities of three operating segments that are not separately reportable due to the materiality of these operating segments. The operating segments include ALLDATA, which produces, sells and maintains diagnostic and repair information software used in the automotive repair industry; E-commerce, which includes direct sales to customers through www.autozone.com; and AutoAnything, which includes direct sales to customers through www.autoanything.com.

The Company evaluates its reportable segment primarily on the basis of net sales and segment profit, which is defined as gross profit. Segment results for the periods presented were as follows:

	Twelve Weeks Ended						Thirty-Six Weeks Ended
(in thousands)	May 10, 2014			May 4, 2013			May 10, 2014			May 4, 2013
Net Sales
Auto Parts Stores	$	2,258,413		$	2,128,109		$	6,191,574		$	5,873,113
Other		83,132			77,769			234,043			179,003
Total	$	2,341,545		$	2,205,878		$	6,425,617		$	6,052,116
Segment Profit
Auto Parts Stores	$	1,171,098		$	1,100,083		$	3,210,084		$	3,024,122
Other		45,860			42,630			129,606			112,438
Gross profit		1,216,958			1,142,713			3,339,690			3,136,560
Operating, selling, general and administrative expenses		(738,006	)		(686,683	)		(2,139,668	)		(1,999,682	)
Interest expense, net		(36,162	)		(42,091	)		(118,083	)		(124,519	)
Income before income taxes	$	442,790		$	413,939		$	1,081,939		$	1,012,359

14

Report of Independent Registered Public Accounting Firm

The Board of Directors and Stockholders

AutoZone, Inc.

We have reviewed the condensed consolidated balance sheet of AutoZone, Inc. as of May 10, 2014, the related condensed consolidated statements of income for the twelve and thirty-six week periods ended May 10, 2014 and May 4, 2013, the condensed consolidated statements of comprehensive income for the twelve and thirty-six week periods ended May 10, 2014 and May 4, 2013, and the condensed consolidated statements of cash flows for the thirty-six week periods ended May 10, 2014 and May 4, 2013. These financial statements are the responsibility of the Company’s management.

We conducted our review in accordance with the standards of the Public Company Accounting Oversight Board (United States). A review of interim financial information consists principally of applying analytical procedures and making inquiries of persons responsible for financial and accounting matters. It is substantially less in scope than an audit conducted in accordance with the standards of the Public Company Accounting Oversight Board, the objective of which is the expression of an opinion regarding the financial statements taken as a whole. Accordingly, we do not express such an opinion.

Based on our review, we are not aware of any material modifications that should be made to the condensed consolidated financial statements referred to above for them to be in conformity with U.S. generally accepted accounting principles.

We have previously audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheet of AutoZone, Inc. as of August 31, 2013, and the related consolidated statements of income, comprehensive income, stockholders’ deficit, and cash flows for the year then ended, not presented herein, and, in our report dated October 28, 2013, we expressed an unqualified opinion on those consolidated financial statements. In our opinion, the information set forth in the accompanying condensed consolidated balance sheet as of August 31, 2013, is fairly stated, in all material respects, in relation to the consolidated balance sheet from which it has been derived.

/s/ Ernst & Young LLP

Memphis, Tennessee

June 18, 2014

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

Overview

We are the nation’s leading retailer, and a leading distributor, of automotive replacement parts and accessories in the United States. We began operations in 1979 and at May 10, 2014, operated 4,901 stores in the United States, including Puerto Rico; 374 in Mexico; and 4 in Brazil. Each of our stores carries an extensive product line for cars, sport utility vehicles, vans and light trucks, including new and remanufactured automotive hard parts, maintenance items, accessories and non-automotive products. At May 10, 2014, in 3,732 of our domestic stores, we also have a commercial sales program that provides commercial credit and prompt delivery of parts and other products to local, regional and national repair garages, dealers, service stations and public sector accounts. We have commercial programs in select stores in Mexico and Brazil as well. We also sell the ALLDATA brand automotive diagnostic and repair software through www.alldata.com and www.alldatadiy.com. Additionally, we sell automotive hard parts, maintenance items, accessories, and non-automotive products through www.autozone.com and www.autoanything.com, and our commercial customers can make purchases through www.autozonepro.com. We do not derive revenue from automotive repair or installation services.

Operating results for the twelve and thirty-six weeks ended May 10, 2014, are not necessarily indicative of the results that may be expected for the fiscal year ending August 30, 2014. Each of the first three quarters of our fiscal year consists of 12 weeks, and the fourth quarter consists of 16 or 17 weeks. The fourth quarter for fiscal 2013 had 17 weeks and for fiscal 2014 has 16 weeks. Our 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.

Executive Summary

Net sales were up 6.2% for the quarter, driven by domestic same store sales (sales for stores open at least one year) growth of 4.0% and from new store growth and increased number of commercial programs. Earnings per share increased 16.4% for the quarter.

Over the past several years, various factors have occurred within the economy that affect both our consumer and our industry, including continued high unemployment and other challenging economic conditions. Although new vehicle sales have increased over previous years, we believe our consumers’ cash flows continue to be challenged due to these factors. Given the nature of these macroeconomic factors, we cannot predict whether or for how long these trends will continue, nor can we predict to what degree these trends will impact us in the future. We remain focused on refining and expanding our product assortment to ensure that we have the best merchandise at the right price in our stores. Our primary responses to fluctuations in the demand for the products we sell are to adjust our inventory levels, store staffing, and advertising level and messages. We continue to believe we are well positioned to help our customers save money and meet their needs in a challenging macro environment.

During the third quarter of fiscal 2014, the price per gallon of unleaded gasoline in the United States began the quarter at $3.38 per gallon and ended the quarter at $3.67 per gallon, a $0.29 increase. During the comparable prior year period, gas prices decreased by $0.07 per gallon, beginning at $3.61 per gallon and ending at $3.54 per gallon. While gas prices remain at these overall high levels, we continue to believe gas prices have an impact on our customers’ abilities to maintain their vehicles, allowing us to communicate through our marketing messages the steps needed to improve their gas mileage. Given the unpredictability of gas prices, we cannot predict whether gas prices will increase or decrease, nor can we predict how any future changes in gas prices will impact our sales in future periods.

During the third quarter of fiscal 2014, failure and maintenance related categories represented the largest portion of our sales mix, at approximately 83% of total sales. While we have not experienced any fundamental shifts in our category sales mix as compared to previous years, we did experience an increase in the mix of sales of the maintenance related categories as compared to the second quarter of fiscal 2014, which we believe was a result of customers deferring maintenance during the harsh winter.

Historically, the two statistics that we believed had the closest correlation to our market growth over the long-term were miles driven and the number of seven year old or older vehicles on the road. While over the long-term, we have seen a close correlation between our net sales and the number of miles driven, we have also seen certain time frames of minimal correlation in sales performance and miles driven. During the periods of minimal correlation between net sales and miles driven, we believe net sales have been positively impacted by other factors, including the number of seven year old or older vehicles on the road. Since the beginning of the fiscal year 2014 and through March 2014, miles driven have increased by 0.5% as compared to the corresponding prior year period. The average age of the U.S. light vehicle fleet continues to trend in our industry’s favor. We believe that annual miles driven will improve to a low single digit growth rate over time and that the number of seven year old or older vehicles will continue to increase; however, we are unable to predict the impact, if any, these indicators will have on future results.

16

Twelve Weeks Ended May 10, 2014,

Compared with Twelve Weeks Ended May 4, 2013

Net sales for the twelve weeks ended May 10, 2014, increased $135.7 million to $2.342 billion, or 6.2%, over net sales of $2.206 billion for the comparable prior year period. Total auto parts sales increased by 6.1%, primarily driven by domestic same store sales increase of 4.0% and net sales of $39.4 million, comprised of sales from new stores and increased commercial programs.

Gross profit for the twelve weeks ended May 10, 2014, was $1.217 billion, or 52.0% of net sales, compared with $1.143 billion, or 51.8% of net sales, during the comparable prior year period. The improvement in gross margin was attributable to higher merchandise margins and lower shrink expense, partially offset by higher supply chain costs associated with current year inventory initiatives (25 basis points).

Operating, selling, general and administrative expenses for the twelve weeks ended May 10, 2014, were $738.0 million, or 31.5% of net sales, compared with $686.7 million, or 31.1% of net sales, during the comparable prior year period. The increase in operating expenses, as a percentage of sales, was primarily due to higher store payroll (14 basis points) and annualizing the benefit recorded last year for the net gain on disposal of certain assets (18 basis points).

Net interest expense for the twelve weeks ended May 10, 2014, was $36.2 million compared with $42.1 million during the comparable prior year period. The decrease was primarily due to a decrease in borrowing rates, partially offset by an increase in debt over the comparable prior year period. Average borrowings for the twelve weeks ended May 10, 2014, were $4.319 billion, compared with $3.968 billion for the comparable prior year period. Weighted average borrowing rates were 3.4% for the twelve weeks ended May 10, 2014, and 4.3% for the twelve weeks ended May 4, 2013.

Our effective income tax rate was 35.6% of pretax income for the twelve weeks ended May 10, 2014, and 35.8% for the comparable prior year period.

Net income for the twelve week period ended May 10, 2014, increased by $19.6 million to $285.2 million, and diluted earnings per share increased by 16.4% to $8.46 from $7.27 in the comparable prior year period. The impact on current quarter diluted earnings per share from stock repurchases since the end of the comparable prior year period was an increase of $0.62.

Thirty-Six Weeks Ended May 10, 2014,

Compared with Thirty-Six Weeks Ended May 4, 2013

Net sales for the thirty-six weeks ended May 10, 2014, increased $373.5 million to $6.426 billion, or 6.2%, over net sales of $6.052 billion for the comparable prior year period. Total auto parts sales increased by 5.4%, primarily driven by domestic same store sales increase of 3.1% and net sales of $112.2 million, comprised of sales from new stores and increased commercial programs.

Gross profit for the thirty-six weeks ended May 10, 2014, was $3.340 billion, or 52.0% of net sales, compared with $3.137 billion, or 51.8% of net sales, during the comparable prior year period. The improvement in gross margin was attributable to higher merchandise margins and lower shrink expense, partially offset by the inclusion of the acquisition of AutoAnything (18 basis points).

Operating, selling, general and administrative expenses for the thirty-six weeks ended May 10, 2014, were $2.140 billion, or 33.3% of net sales, compared with $2.000 billion, or 33.0% of net sales, during the comparable prior year period. Operating expenses, as a percentage of sales, increased primarily due to store payroll and annualizing the benefit recorded last year for the net gain on disposal of certain assets.

Net interest expense for the thirty-six weeks ended May 10, 2014, was $118.1 million compared with $124.5 million during the comparable prior year period. The decrease was primarily due to a decrease in borrowing rates, partially offset by an increase in debt over the comparable prior year period. Average borrowings for the thirty-six weeks ended May 10, 2014, were $4.243 billion, compared with $3.886 billion for the comparable prior year period. Weighted average borrowing rates were 3.8% for the thirty-six weeks ended May 10, 2014, and 4.4% for the thirty-six weeks ended May 4, 2013.

Our effective income tax rate was 35.7% of pretax income for the thirty-six weeks ended May 10, 2014, and 36.3% for the comparable prior year period.

Net income for the thirty-six week period ended May 10, 2014, increased by $50.8 million to $696.1 million, and diluted earnings per share increased by 16.6% to $20.34 from $17.44 in the comparable prior year period. The impact on year to date diluted earnings per share from stock repurchases since the end of the comparable prior year period was an increase of $1.15.

Liquidity and Capital Resources

The primary source of our liquidity is our cash flows realized through the sale of automotive parts, products and accessories. For the thirty-six weeks ended May 10, 2014, our net cash flows from operating activities provided $971.1 million as compared with $895.9 million provided during the comparable prior year period. The increase is primarily driven by the timing of tax payments and increased net income.

Our net cash flows used in investing activities for the thirty-six weeks ended May 10, 2014, was $275.0 million as compared with $374.1 million in the comparable prior year period. Capital expenditures for the thirty-six weeks ended May 10, 2014, were $261.7 million compared to $258.9 million for the comparable prior year period. During the thirty-six week period ended May 10, 2014, we opened 78 net new stores.

17

In the comparable prior year period, we opened 103 net new stores. Investing cash flows for the purchase of intangibles were $11.1 million for the thirty-six weeks ended May 10, 2014, as compared with $116.1 million used in the acquisition of AutoAnything in the comparable prior year period. Investing cash flows were also impacted by our wholly owned captive, which purchased $28.6 million and sold $25.0 million in marketable securities during the thirty-six weeks ended May 10, 2014. During the comparable prior year period, the captive purchased $26.8 million in marketable securities and sold $20.3 million in marketable securities. Capital asset disposals and other investing activities provided $1.5 million during the thirty-six week period ended May 10, 2014, and provided $7.4 million in the comparable prior year period.

Our net cash flows used in financing activities for the thirty-six weeks ended May 10, 2014, was $694.0 million compared to $492.8 million in the comparable prior year period. During the thirty-six weeks ended May 10, 2014, we received $400 million in proceeds from the issuance of debt compared to $800 million in proceeds from the issuance of debt during the comparable prior year period. During the thirty-six weeks ended May 10, 2014, we repaid our $500 million of Senior Notes due in January 2014 using proceeds from the $400 million bond issuance in fiscal 2014 and commercial paper borrowings. During the comparable prior year period we repaid our $300 million Senior Note due in October 2012 using commercial paper borrowings. For the thirty-six weeks ended May 10, 2014, there were $291.4 million net proceeds from commercial paper, as compared to $267.2 million net repayments of commercial paper and short-term borrowings in the comparable prior year period. Stock repurchases were $911.5 million in the current thirty-six week period as compared with $827.3 million in the comparable prior year period. For the thirty-six weeks ended May 10, 2014, proceeds from the sale of common stock and exercises of stock options provided $52.7 million, including $18.3 million in related tax benefits. In the comparable prior year period, proceeds from the sale of common stock and exercises of stock options provided $136.3 million, including $53.5 million in related tax benefits.

During fiscal 2014, we expect to invest in our business at an increased rate as compared to fiscal 2013. Our investment is expected to be directed primarily to our new-store development program, enhancements to existing stores and infrastructure. The amount of our investments in our new-store program is impacted by different factors, including such factors as whether the building and land are purchased (requiring higher investment) or leased (generally lower investment), located in the United States, Puerto Rico, Mexico, or Brazil, or located in urban or rural areas. Our mix of store openings has moved away from build-to-suit leases (lower initial capital investment) to ground leases and land purchases (higher initial capital investment), resulting in increased capital expenditures per store during recent years. We expect this trend to continue during the remainder of the fiscal year ending August 30, 2014.

In addition to the building and land costs, our new-store development program requires working capital, predominantly for inventories. Historically, we have negotiated extended payment terms from suppliers, reducing the working capital required and resulting in a high accounts payable to inventory ratio. Accounts payable, as a percent of gross inventory, was 114.1% compared to 111.4% last year. We plan to continue leveraging our inventory purchases; however, our ability to do so may be limited by our vendors’ capacity to factor their receivables from us. Certain vendors participate in financing arrangements with financial institutions whereby they factor their receivables from us, allowing them to receive payment on our invoices at a discounted rate.

Depending on the timing and magnitude of our future investments (either in the form of leased or purchased properties or acquisitions), we anticipate that we will rely primarily on internally generated funds and available borrowing capacity to support a majority of our capital expenditures, working capital requirements and stock repurchases. The balance may be funded through new borrowings. We anticipate that we will be able to obtain such financing in view of our current credit ratings and favorable experiences in the debt markets in the past.

For the trailing four quarters ended May 10, 2014, our after-tax return on invested capital (“ROIC”) was 32.4% as compared to 32.3% for the comparable prior year period. ROIC is calculated as after-tax operating profit (excluding rent charges) divided by average invested capital (which includes a factor to capitalize operating leases). ROIC increased primarily due to increased after-tax operating profit. We use ROIC to evaluate whether we are effectively using our capital resources and believe it is an important indicator of our overall operating performance.

Debt Facilities

In December 2013, we amended and restated our revolving credit facility, increasing the capacity under the revolving credit facility to $1.25 billion. This credit facility is available to primarily support commercial paper borrowings, letters of credit and other short-term, unsecured bank loans. The capacity of the credit facility may be increased to $1.5 billion prior to the maturity date at our election and subject to bank credit capacity and approval, may include up to $200 million in letters of credit, and may include up to $175 million in capital leases each fiscal year. Under the revolving credit facility, we may borrow funds consisting of Eurodollar loans or base rate loans. Interest accrues on Eurodollar loans at a defined Eurodollar rate, defined as the London InterBank Offered Rate (“LIBOR”) plus the applicable percentage, as defined in the revolving credit facility, depending upon our senior, unsecured, (non-credit enhanced) long-term debt rating. Interest accrues on base rate loans as defined in the revolving credit facility. We also have the option to borrow funds under the terms of a swingline loan subfacility. The revolving credit facility expires in September 2017.

We also maintain a letter of credit facility that allows us to request the participating bank to issue letters of credit on our behalf up to an aggregate amount of $100 million. The letter of credit facility is in addition to the letters of credit that may be issued under the revolving credit facility. As of May 10, 2014, we have $100.0 million in letters of credit outstanding under the letter of credit facility, which expires in June 2016.

In addition to the outstanding letters of credit issued under the committed facilities discussed above, we had $36.6 million in letters of credit outstanding as of May 10, 2014. These letters of credit have various maturity dates and were issued on an uncommitted basis.

18

As of May 10, 2014, $928.4 million of commercial paper borrowings and $284.8 million of the 5.750% Senior Notes due January 2015 are classified as long-term in the Consolidated Balance Sheets as we have the ability and intent to refinance on a long-term basis through available capacity in our revolving credit facility. As of May 10, 2014, we had $1.213 billion of availability under our $1.25 billion revolving credit facility, expiring in September 2017 that would allow us to replace these short-term obligations with long-term financing.

On January 14, 2014, we issued $400 million in 1.300% Notes due January 2017 under our shelf registration statement filed with the SEC on April 17, 2012 (the “Shelf Registration”). The Shelf Registration allows us to sell an indeterminate amount in debt securities to fund general corporate purposes, including repaying, redeeming or repurchasing outstanding debt and for working capital, capital expenditures, new store openings, stock repurchases and acquisitions. Proceeds from the debt issuance on January 14, 2014, were used to repay a portion of the $500 million in 6.500% Senior Notes due January 2014. We used commercial paper borrowings to repay the remainder of the 6.500% Senior Notes.

On April 29, 2013, the Company issued $500 million in 3.125% Senior Notes due July 2023 under its Shelf Registration. Proceeds from the debt issuance on April 29, 2013, were used to repay a portion of the outstanding commercial paper borrowings, which were used to repay the $200 million in 4.375% Senior Notes due in June 2013, and for general corporate purposes.

On November 13, 2012, the Company issued $300 million in 2.875% Senior Notes due January 2023 under its Shelf Registration. Proceeds from the debt issuance on November 13, 2012, were used to repay a portion of the outstanding commercial paper borrowings, which were used to repay the $300 million in 5.875% Senior Notes due in October 2012, and for general corporate purposes.

The 5.750% Senior Notes issued in July 2009 and the 6.500% and 7.125% Senior Notes issued during August 2008, are subject to an interest rate adjustment if the debt ratings assigned to these notes are downgraded. Further, all senior notes issued since August 2008 contain a provision that repayment of the notes may be accelerated if we experience a change in control (as defined in the agreements). Our borrowings under our other senior notes contain minimal covenants, primarily restrictions on liens. Under our other borrowing arrangements, covenants include limitations on total indebtedness, restrictions on liens, a minimum fixed charge coverage ratio and a change of control provision that may require acceleration of the repayment obligations under certain circumstances. All of the repayment obligations under our borrowing arrangements may be accelerated and come due prior to the scheduled payment date if covenants are breached or an event of default occurs. As of May 10, 2014, we were in compliance with all covenants and expect to remain in compliance with all covenants.

Our adjusted debt to earnings before interest, taxes, depreciation, amortization, rent and share-based expense (“EBITDAR”) ratio was 2.5:1 as of May 10, 2014, and was 2.5:1 as of May 4, 2013. We calculate adjusted debt as the sum of total debt, capital lease obligations and rent times six; and we calculate EBITDAR by adding interest, taxes, depreciation, amortization, rent and share-based expenses to net income. Adjusted debt to EBITDAR is calculated on a trailing four quarter basis. We target our debt levels to a ratio of adjusted debt to EBITDAR in order to maintain our investment grade credit ratings. We believe this is important information for the management of our debt levels.

Stock Repurchases

From January 1, 1998 to May 10, 2014, we have repurchased a total of 136.5 million shares at an aggregate cost of $13.843 billion, including 1,876,659 shares of our common stock at an aggregate cost of $911.5 million during the thirty-six week period ended May 10, 2014. On December 17, 2013, the Board voted to increase the authorization by $750 million to raise the cumulative share repurchase authorization from $13.4 billion to $14.15 billion. Considering cumulative repurchases as of May 10, 2014, we have $306.9 million remaining under the Board’s authorization to repurchase our common stock.

On June 17, 2014, the Board voted to increase the authorization by $750 million to raise the cumulative share repurchase authorization from $14.15 billion to $14.9 billion. Subsequent to May 10, 2014, the Company has repurchased 84,400 shares of its common stock at an aggregate cost of $44.4 million. Considering the cumulative repurchases and the increase in authorization subsequent to May 10, 2014, the Company has $1.013 billion remaining under the Board’s authorization to repurchase its common stock.

During the thirty-six week period ended May 10, 2014, we retired 3.2 million shares of treasury stock which had previously been repurchased under our share repurchase program. The retirement increased Retained deficit by $1.220 billion and decreased Additional paid-in capital by $74.0 million. During the comparable prior year period, we retired 3.9 million shares of treasury stock, which increased Retained deficit by $1.362 billion and decreased Additional paid-in capital by $75.7 million.

Off-Balance Sheet Arrangements

Since our fiscal year end, we have cancelled, issued and modified stand-by letters of credit that are primarily renewed on an annual basis to cover deductible payments to our casualty insurance carriers. Our total stand-by letters of credit commitment at May 10, 2014, was $141.0 million compared with $145.4 million at August 31, 2013, and our total surety bonds commitment at May 10, 2014, was $27.4 million compared with $30.7 million at August 31, 2013.

Financial Commitments

As of May 10, 2014, there were no significant changes to our contractual obligations as described in our Annual Report on Form 10-K for the year ended August 31, 2013.

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Reconciliation of Non-GAAP Financial Measures

Management’s Discussion and Analysis of Financial Condition and Results of Operations include certain financial measures not derived in accordance with U.S. generally accepted accounting principles (“GAAP”). These non-GAAP financial measures provide additional information for determining our optimum capital structure and are used to assist management in evaluating performance and in making appropriate business decisions to maximize stockholders’ value.

Non-GAAP financial measures should not be used as a substitute for GAAP financial measures, or considered in isolation, for the purpose of analyzing our operating performance, financial position or cash flows. However, we have presented the non-GAAP financial measures, as we believe they provide additional information that is useful to investors. Furthermore, our management and the Compensation Committee of the Board use the abovementioned non-GAAP financial measures to analyze and compare our underlying operating results and to determine payments of performance-based compensation. We have included a reconciliation of this information to the most comparable GAAP measures in the following reconciliation tables.

Reconciliation of Non-GAAP Financial Measure: After-Tax Return on Invested Capital “ROIC”

The following tables calculate the percentages of ROIC for the trailing four quarters ended May 10, 2014 and May 4, 2013.

	A			B			A-B=C			D			C+D
(in thousands, except percentage)	Fiscal Year Ended August 31, 2013 (6)			Thirty-Six Weeks Ended May 4, 2013			Seventeen Weeks Ended August 31, 2013 (6)			Thirty-six Weeks Ended May 10, 2014			Trailing Four Quarters Ended May 10, 2014 (6)
Net income	$	1,016,480		$	645,281		$	371,199		$	696,074		$	1,067,273
Adjustments:
Interest expense		185,415			124,519			60,896			118,083			178,979
Rent expense		246,340			166,349			79,991			174,615			254,606
Tax effect (1)		(153,705	)		(103,549	)		(50,156	)		(104,200	)		(154,356	)
After-tax return	$	1,294,530		$	832,600		$	461,930		$	884,572		$	1,346,502
Average debt (2)													$	4,212,337
Average deficit (3)														(1,691,875	)
Rent x 6 (4)														1,527,636
Average capital lease obligations (5)														105,496
Pre-tax invested capital													$	4,153,594
ROIC														32.4	%

	A			B			A-B=C			D			C+D
(in thousands, except percentage)	Fiscal Year Ended August 25, 2012			Thirty-Six Weeks Ended May 5, 2012			Sixteen Weeks Ended August 25, 2012			Thirty-six Weeks Ended May 4, 2013			Trailing Four Quarters Ended May 4, 2013
Net income	$	930,373		$	606,641		$	323,732		$	645,281		$	969,013
Adjustments:
Interest expense		175,905			117,760			58,145			124,519			182,664
Rent expense		229,417			158,109			71,308			166,349			237,657
Tax effect (1)		(145,916	)		(99,313	)		(46,603	)		(104,712	)		(151,315	)
After-tax return	$	1,189,779		$	783,197		$	406,582		$	831,437		$	1,238,019
Average debt (2)													$	3,835,221
Average deficit (3)														(1,527,734	)
Rent x 6 (4)														1,425,942
Average capital lease obligations (5)														101,633
Pre-tax invested capital													$	3,835,062
ROIC														32.3	%

(1) The effective tax rate was 35.6% and 36.0% over the trailing four quarters ended May 10, 2014 and May 4, 2013 respectively.

(2) Average debt is equal to the average of our debt measured as of the previous five quarters.

(3) Average equity is equal to the average of our stockholders’ deficit measured as of the previous five quarters.

(4) Rent is multiplied by a factor of six to capitalize operating leases in the determination of pre-tax invested capital.

(5) Average capital lease obligations are equal to the average of our capital lease obligations measured as of the previous five quarters.

(6) The fiscal year ended August 31, 2013 consisted of 53 weeks resulting in an additional week for the trailing four quarters ended May 10, 2014.

20

Reconciliation of Non-GAAP Financial Measure: Adjusted Debt to Earnings before Interest, Taxes, Depreciation, Rent and Share-Based Expense

The following tables calculate the ratio of adjusted debt to EBITDAR for the trailing four quarters ended May 10, 2014 and May 4, 2013.

		A		B		A-B=C		D		C+D
(in thousands, except ratio)		Fiscal Year Ended August 31, 2013 (2)		Thirty-Six Weeks Ended May 4, 2013		Seventeen Weeks Ended August 31, 2013 (2)		Thirty-Six Weeks Ended May 10, 2014		Trailing Four Quarters Ended May 10, 2014 (2)
Net income		$	1,016,480	$	645,281	$	371,199	$	696,074	$	1,067,273
Add:	Interest expense		185,415		124,519		60,896		118,083		178,979
	Income tax expense		571,203		367,078		204,125		385,865		589,990
EBIT			1,773,098		1,136,878		636,220		1,200,022		1,836,242
Add:	Depreciation expense		227,251		155,932		71,319		172,286		243,605
	Rent expense		246,340		166,349		79,991		174,615		254,606
	Share-based expense		37,307		25,632		11,675		28,985		40,660
EBITDAR		$	2,283,996	$	1,484,791	$	799,205	$	1,575,908	$	2,375,113
Debt										$	4,378,400
Capital lease obligations											106,214
Add: Rent x 6 (1)											1,527,636
Adjusted debt										$	6,012,250
Adjusted debt / EBITDAR											2.5

		A		B		A-B=C		D		C+D
(in thousands, except ratio)		Fiscal Year Ended August 25, 2012		Thirty-Six Weeks Ended May 5, 2012		Sixteen Weeks Ended August 25, 2012		Thirty-Six Weeks Ended May 4, 2013		Trailing Four Quarters Ended May 4, 2013
Net income		$	930,373	$	606,641	$	323,732	$	645,281	$	969,013
Add:	Interest expense		175,905		117,760		58,145		124,519		182,664
	Income tax expense		522,613		344,434		178,179		367,078		545,257
EBIT			1,628,891		1,068,835		560,056		1,136,878		1,696,934
Add:	Depreciation expense		211,831		145,177		66,654		155,932		222,586
	Rent expense		229,417		158,109		71,308		166,349		237,657
	Share-based expense		33,363		23,872		9,491		25,632		35,123
EBITDAR		$	2,103,502	$	1,395,993	$	707,509	$	1,484,791	$	2,192,300
Debt										$	4,001,100
Capital lease obligations											104,707
Add: Rent x 6 (1)											1,425,942
Adjusted debt										$	5,531,749
Adjusted debt / EBITDAR											2.5

(1) Rent is multiplied by a factor of six to capitalize operating leases in the determination of adjusted debt.

(2) The fiscal year ended August 31, 2013 consisted of 53 weeks resulting in an additional week for the trailing four quarters ended May 10, 2014.

21

Recently Adopted Accounting Pronouncements:

Refer to Note A of the Notes to Condensed Consolidated Financial Statements for the discussion of recently adopted accounting pronouncements.

Critical Accounting Policies

Preparation of our consolidated financial statements requires us to make estimates and assumptions affecting the reported amounts of assets and liabilities at the date of the financial statements, reported amounts of revenues and expenses during the reporting period and related disclosures of contingent liabilities. Our policies are evaluated on an ongoing basis, and our significant judgments and estimates are drawn from historical experience and other assumptions that we believe to be reasonable under the circumstances. Actual results could differ under different assumptions or conditions.

Our critical accounting policies are described in Management’s Discussion and Analysis of Financial Condition and Results of Operations in our Annual Report on Form 10-K for the year ended August 31, 2013. Our critical accounting policies have not changed since the filing of our Annual Report on Form 10-K for the year ended August 31, 2013.

Forward-Looking Statements

Certain statements contained in this Quarterly Report on Form 10-Q are forward-looking statements. Forward-looking statements typically use words such as “believe,” “anticipate,” “should,” “intend,” “plan,” “will,” “expect,” “estimate,” “project,” “positioned,” “strategy” and similar expressions. These are based on assumptions and assessments made by our management in light of experience and perception of historical trends, current conditions, expected future developments and other factors that we believe to be appropriate. These forward-looking statements are subject to a number of risks and uncertainties, including without limitation: credit market conditions; the impact of recessionary conditions; competition; product demand; the ability to hire and retain qualified employees; consumer debt levels; inflation; weather; raw material costs of our suppliers; energy prices; war and the prospect of war, including terrorist activity; construction delays; access to available and feasible financing; and changes in laws or regulations. Certain of these risks are discussed in more detail in the “Risk Factors” section contained in Item 1A under Part 1 of our Annual Report on Form 10-K for the year ended August 31, 2013, and these Risk Factors should be read carefully. Forward-looking statements are not guarantees of future performance and actual results; developments and business decisions may differ from those contemplated by such forward-looking statements, and events described above and in the “Risk Factors” could materially and adversely affect our business. Forward-looking statements speak only as of the date made. Except as required by applicable law, we undertake no obligation to update publicly any forward-looking statements, whether as a result of new information, future events or otherwise. Actual results may materially differ from anticipated results.

Item 3. Quantitative and Qualitative Disclosures about Market Risk.

At May 10, 2014, there have been no material changes to our instruments and positions that are sensitive to market risk since the disclosures in our Annual Report on Form 10-K for the year ended August 31, 2013, except as described below.

The fair value of our debt was estimated at $4.503 billion as of May 10, 2014, and $4.259 billion as of August 31, 2013, based on the quoted market prices for the same or similar debt issues or on the current rates available to AutoZone for debt of the same terms. Such fair value is greater than the carrying value of debt by $124.9 million at May 10, 2014 and $72.2 million at August 31, 2013. We had $928.4 million of variable rate debt outstanding at May 10, 2014, and $637.0 million of variable rate debt outstanding at August 31, 2013. At these borrowing levels for variable rate debt, a one percentage point increase in interest rates would have had an unfavorable annual impact on our pre-tax earnings and cash flows of $9.3 million in fiscal 2014. The primary interest rate exposure on variable rate debt is based on LIBOR. We had outstanding fixed rate debt of $3.450 billion at May 10, 2014 and $3.550 billion at August 31, 2013. A one percentage point increase in interest rates would reduce the fair value of our fixed rate debt by $154.2 million at May 10, 2014.

Item 4. Controls and Procedures.

As of May 10, 2014, an evaluation was performed under the supervision and with the participation of our management, including the Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, as amended. Based on that evaluation, our management, including the Chief Executive Officer and Chief Financial Officer, concluded that our disclosure controls and procedures were effective as of May 10, 2014. During or subsequent to the quarter ended May 10, 2014, there were no changes in our internal controls that have materially affected or are reasonably likely to materially affect, internal controls over financial reporting.

During the thirty-six weeks ended May 10, 2014, we implemented several modules of a new accounting system, including a general ledger, accounts payable and fixed assets module. The internal controls over financial reporting affected by this implementation were evaluated for design and found to be effective. Prior to implementation of the modules, user acceptance testing was performed to ensure the system was functioning as designed. Post-implementation reviews have been and will continue to be conducted by management to ensure that the internal controls surrounding the system implementation processes, key applications and the financial close process are properly designed and are operating effectively. We expect to implement additional modules during the remainder of fiscal 2014 and will apply the same methodology to those implementations.

22

Item 4T. Controls and Procedures.

Not applicable.

PART II. OTHER INFORMATION

Item 1. Legal Proceedings.

In 2004, we acquired a store site in Mount Ephraim, New Jersey that had previously been the site of a gasoline service station and contained evidence of groundwater contamination. Upon acquisition, we voluntarily reported the groundwater contamination issue to the New Jersey Department of Environmental Protection and entered into a Voluntary Remediation Agreement providing for the remediation of the contamination associated with the property. We have conducted and paid for (at an immaterial cost to us) remediation of contamination on the property. We are also investigating, and will be addressing, potential vapor intrusion impacts in downgradient residences and businesses. The New Jersey Department of Environmental Protection has asserted, in a Directive and Notice to Insurers dated February 19, 2013 and again in an Amended Directive and Notice to Insurers dated January 13, 2014 (collectively the “Directives”), that we are liable for the downgradient impacts under a joint and severable liability theory. We have contested any such assertions due to the existence of other entities/sources of contamination, some of which are also named in the Directives, in the area of the property. Pursuant to the Voluntary Remediation Agreement, upon completion of all remediation required by the agreement, we believe we are eligible to be reimbursed up to 75 percent of qualified remediation costs by the State of New Jersey. We have asked the state for clarification that the agreement applies to off-site work, and the state is considering the request. Although the aggregate amount of additional costs that we may incur pursuant to the remediation cannot currently be ascertained, we do not currently believe that fulfillment of our obligations under the agreement or otherwise will result in costs that are material to our financial condition, results of operations or cash flow.

We are involved in various other legal proceedings incidental to the conduct of our business, including several lawsuits containing class-action allegations in which the plaintiffs are current and former hourly and salaried employees who allege various wage and hour violations and unlawful termination practices. We do not currently believe that, either individually or in the aggregate, these matters will result in liabilities material to our financial condition, results of operations or cash flows.

Item 1A. Risk Factors.

As of the date of this filing, there have been no material changes in our risk factors from those disclosed in Part I, Item 1A, of our Annual Report on Form 10-K for the fiscal year ended August 31, 2013.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.

Shares of common stock repurchased by the Company during the quarter ended May 10, 2014, were as follows:

Issuer Repurchases of Equity Securities

Period	Total Number of Shares Purchased		Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs		Maximum Dollar Value that May Yet Be Purchased Under the Plans or Programs
February 16, 2014 to March 15, 2014		95,795	$	542.11		95,795	$	674,972,944
March 16, 2014 to April 12, 2014		409,272		531.36		409,272		457,502,272
April 13, 2014 to May 10, 2014		289,457		520.28		289,457		306,904,681
Total		794,524	$	528.62		794.524	$	306,904,681

During 1998, we announced a program permitting us to repurchase a portion of our outstanding shares not to exceed a dollar maximum established by our Board of Directors. This program was most recently amended on June 17, 2014, to increase the repurchase authorization to $14.9 billion from $14.15 billion and does not have an expiration date. All of the above repurchases were part of this program.

Subsequent to May 10, 2014, we have repurchased 84,400 shares of our common stock at an aggregate cost of $44.4 million. Considering the increase in the authorization and cumulative repurchases subsequent to May 10, 2014, we have $1.013 billion remaining under the Board’s authorization to repurchase its common stock.

Item 3. Defaults Upon Senior Securities.

Not applicable.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information.

Not applicable.

23

Item 6. Exhibits.

The following exhibits are filed as part of this report:

3.1	Restated Articles of Incorporation of AutoZone, Inc. incorporated by reference to Exhibit 3.1 to the Quarterly Report on Form 10-Q for the quarter ended February 13, 1999.
3.2	Fifth Amended and Restated By-laws of AutoZone, Inc. incorporated by reference to Exhibit 3.1 to the Current Report on Form 8-K dated September 28, 2011.
12.1	Computation of Ratio of Earnings to Fixed Charges.
15.1	Letter Regarding Unaudited Interim Financial Statements.
31.1	Certification of Principal Executive Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of Principal Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1	Certification of Principal Executive Officer Pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2	Certification of Principal Financial Officer Pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101. INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Document
101.LAB	XBRL Taxonomy Extension Labels Document
101.PRE	XBRL Taxonomy Extension Presentation Document
101.DEF	XBRL Taxonomy Extension Definition Document

24

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

AUTOZONE, INC.
By:	/s/ WILLIAM T. GILES
William T. Giles
Chief Financial Officer and Executive Vice President Finance, Information Technology and ALLDATA (Principal Financial Officer)

By:	/s/ CHARLIE PLEAS, III
Charlie Pleas, III
Senior Vice President, Controller (Principal Accounting Officer)

Dated: June 18, 2014

25

EXHIBIT INDEX

The following exhibits are filed as part of this report:

3.1	Restated Articles of Incorporation of AutoZone, Inc. incorporated by reference to Exhibit 3.1 to the Quarterly Report on Form 10-Q for the quarter ended February 13, 1999.
3.2	Fifth Amended and Restated By-laws of AutoZone, Inc. incorporated by reference to Exhibit 3.1 to the Current Report on Form 8-K dated September 28, 2011.
12.1	Computation of Ratio of Earnings to Fixed Charges.
15.1	Letter Regarding Unaudited Interim Financial Statements.
31.1	Certification of Principal Executive Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of Principal Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1	Certification of Principal Executive Officer Pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2	Certification of Principal Financial Officer Pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Document
101.LAB	XBRL Taxonomy Extension Labels Document
101.PRE	XBRL Taxonomy Extension Presentation Document
101.DEF	XBRL Taxonomy Extension Definition Document

26

EX-12.1

Exhibit 12.1

Computation of Ratio of Earnings to Fixed Charges

(Unaudited)

(in thousands, except ratios)

	Thirty-Six Weeks Ended
	May 10, 2014			May 4, 2013
Earnings:
Income before income taxes	$	1,081,939		$	1,012,359
Fixed charges		174,597			178,281
Less: Capitalized interest		(670	)		(810	)
Adjusted earnings	$	1,255,866		$	1,189,830
Fixed charges:
Gross interest expense	$	115,275		$	120,573
Amortization of debt origination fees		4,895			5,857
Interest portion of rent expense		54,427			51,851
Fixed charges	$	174,597		$	178,281
Ratio of earnings to fixed charges		7.2			6.7

	Fiscal Year Ended August
	2013 (53 weeks)			2012 (52 weeks)			2011 (52 weeks)			2010 (52 weeks)			2009 (52 weeks)
Earnings:
Income before income taxes	$	1,587,683		$	1,452,986		$	1,324,246		$	1,160,505		$	1,033,746
Fixed charges		265,108			250,056			240,329			223,608			204,017
Less: Capitalized interest		(1,303	)		(1,245	)		(1,059	)		(1,093	)		(1,301	)
Adjusted earnings	$	1,851,488		$	1,701,797		$	1,563,516		$	1,383,020		$	1,236,462
Fixed charges:
Gross interest expense	$	180,085		$	170,481		$	164,712		$	156,135		$	143,860
Amortization of debt origination fees		8,239			8,066			8,962			6,495			3,644
Interest portion of rent expense		76,784			71,509			66,655			60,978			56,513
Fixed charges	$	265,108		$	250,056		$	240,329		$	223,608		$	204,017
Ratio of earnings to fixed charges		7.0			6.8			6.5			6.2			6.1

27

EX-15.1

Exhibit 15.1

The Board of Directors and Stockholders

AutoZone, Inc.

We are aware of the incorporation by reference in the following Registration Statements of AutoZone, Inc. and in the related Prospectuses of our report dated June 18, 2014, related to the unaudited condensed consolidated financial statements of AutoZone, Inc. that are included in its Quarterly Report on Form 10-Q for the quarter ended May 10, 2014:

Registration Statement (Form S-8 No. 333-19561) pertaining to the AutoZone, Inc. 1996 Stock Option Plan

Registration Statement (Form S-8 No. 333-42797) pertaining to the AutoZone, Inc. Amended and Restated Employee Stock Purchase Plan

Registration Statement (Form S-8 No. 333-48981) pertaining to the AutoZone, Inc. 1998 Director Stock Option Plan

Registration Statement (Form S-8 No. 333-48979) pertaining to the AutoZone, Inc. 1998 Director Compensation Plan

Registration Statement (Form S-8 No. 333-88245) pertaining to the AutoZone, Inc. Second Amended and Restated 1996 Stock Option Plan

Registration Statement (Form S-8 No. 333-88243) pertaining to the AutoZone, Inc. Amended and Restated 1998 Director Stock Option Plan

Registration Statement (Form S-8 No. 333-88241) pertaining to the AutoZone, Inc. Amended and Restated Director Compensation Plan

Registration Statement (Form S-8 No. 333-75142) pertaining to the AutoZone, Inc. Third Amended and Restated 1998 Director Stock Option Plan

Registration Statement (Form S-8 No. 333-75140) pertaining to the AutoZone, Inc. Executive Stock Purchase Plan

Registration Statement (Form S-3 No. 333-83436) pertaining to a shelf registration to sell 15,000,000 shares of common stock owned by certain selling stockholders

Registration Statement (Form S-8 No. 333-103665) pertaining to the AutoZone, Inc. 2003 Director Compensation Plan

Registration Statement (Form S-8 No. 333-103666) pertaining to the AutoZone, Inc. 2003 Director Stock Option Plan

Registration Statement (Form S-8 No. 333-139559) pertaining to the AutoZone, Inc. 2006 Stock Option Plan

Registration Statement (Form S-8 No. 333-171186) pertaining to the AutoZone, Inc. 2011 Equity Incentive Award Plan

Registration Statement (Form S-3 No. 333-180768) pertaining to a shelf registration to sell debt securities

/s/ Ernst & Young LLP

Memphis, Tennessee

June 18, 2014

28

EX-31.1

Exhibit 31.1

CERTIFICATION PURSUANT TO

RULES 13a-14(a) AND 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934,

AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, William C. Rhodes, III, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of AutoZone, Inc. (“registrant”);

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

June 18, 2014

/s/ WILLIAM C. RHODES, III

William C. Rhodes, III

Chairman, President and Chief Executive Officer

(Principal Executive Officer)

29

EX-31.2

Exhibit 31.2

CERTIFICATION PURSUANT TO

RULES 13a-14(a) AND 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934,

AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, William T. Giles, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of AutoZone, Inc. (“registrant”);

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

June 18, 2014

/s/ WILLIAM T. GILES

William T. Giles

Chief Financial Officer and Executive Vice President

Finance, Information Technology and ALLDATA

(Principal Financial Officer)

30

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of AutoZone, Inc. (the “Company”) on Form 10-Q for the period ended May 10, 2014, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, William C. Rhodes, III, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(i) the Report fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934; and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

June 18, 2014

/s/ WILLIAM C. RHODES, III

William C. Rhodes, III

Chairman, President and Chief Executive Officer

(Principal Executive Officer)

31

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of AutoZone, Inc. (the “Company”) on Form 10-Q for the period ended May 10, 2014, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, William T. Giles, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(i) the Report fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934; and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

June 18, 2014

/s/ WILLIAM T. GILES

William T. Giles

Chief Financial Officer and Executive Vice President

Finance, Information Technology and ALLDATA

(Principal Financial Officer)

32

XML

Pension and Savings Plans - Net Periodic Pension Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	May 10, 2014	May 04, 2013	May 10, 2014	May 04, 2013
Compensation And Retirement Disclosure [Abstract]
Interest cost	$ 3,016	$ 2,659	$ 9,048	$ 7,977
Expected return on plan assets	(3,550)	(3,083)	(10,650)	(9,249)
Amortization of net loss	1,587	3,333	4,761	9,999
Net periodic pension expense	$ 1,053	$ 2,909	$ 3,159	$ 8,727

XML

Goodwill and Intangibles - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	May 10, 2014	May 04, 2013	May 10, 2014	May 04, 2013
Goodwill And Intangible Assets Disclosure [Abstract]
Increase in intangible asset			$ 30.2
Amortization expense of intangible assets	$ 2.0	$ 0.9	$ 4.4	$ 1.5

XML

Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	May 10, 2014	May 04, 2013	May 10, 2014	May 04, 2013
Pension Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from accumulated other comprehensive income, taxes	$ 630	$ 1,296	$ 1,898	$ 4,489
Net Unrealized Gain on Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from accumulated other comprehensive income, taxes	19	9	33	38
Derivatives [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from accumulated other comprehensive income, taxes	$ 17	$ 150	$ 48	$ 408

XML

Fair Value Measurements - Company's Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	May 10, 2014	Aug. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-For-Sale Marketable Securities, Fair Value	$ 86,007	$ 82,161
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other current assets	17,717	16,410
Other long-term assets	68,290	65,751
Available-For-Sale Marketable Securities, Fair Value	86,007	82,161
Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other current assets	17,678	16,386
Other long-term assets	50,328	49,011
Available-For-Sale Marketable Securities, Fair Value	68,006	65,397
Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other current assets	39	24
Other long-term assets	17,962	16,740
Available-For-Sale Marketable Securities, Fair Value	18,001	16,764
Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other current assets
Other long-term assets
Available-For-Sale Marketable Securities, Fair Value

XML

Pension and Savings Plans (Tables)

9 Months Ended

May 10, 2014

Compensation And Retirement Disclosure [Abstract]

Net Periodic Pension Expense

The components of net periodic pension expense related to the Company’s pension plans consisted of the following:

	Twelve Weeks Ended						Thirty-Six Weeks Ended
(in thousands)	May 10, 2014			May 4, 2013			May 10, 2014			May 4, 2013
Interest cost	$	3,016		$	2,659		$	9,048		$	7,977
Expected return on plan assets		(3,550	)		(3,083	)		(10,650	)		(9,249	)
Amortization of net loss		1,587			3,333			4,761			9,999
Net periodic pension expense	$	1,053		$	2,909		$	3,159		$	8,727

XML

Goodwill and Intangibles - Schedule of Future Amortization Expense for Finite Lived Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	May 10, 2014
Goodwill And Intangible Assets Disclosure [Abstract]
Remainder of fiscal 2014	$ 2,652
2015	8,618
2016	8,618
2017	8,353
2018	6,725
Thereafter	17,955
Finite Lived, Net Carrying Amount	$ 52,921

XML

Financing - Schedule of Long-term Debt (Parenthetical) (Detail)			1 Months Ended	3 Months Ended								0 Months Ended	3 Months Ended								0 Months Ended	3 Months Ended		0 Months Ended	3 Months Ended
	May 10, 2014 Commercial paper, weighted average interest rate of 0.26% and 0.29% at May 10, 2014 and August 31, 2013, respectively [Member]	Aug. 31, 2013 Commercial paper, weighted average interest rate of 0.26% and 0.29% at May 10, 2014 and August 31, 2013, respectively [Member]	Jan. 14, 2014 6.500% Senior Notes due January 2014, Effective Interest Rate of 6.63% [Member]	May 10, 2014 6.500% Senior Notes due January 2014, Effective Interest Rate of 6.63% [Member]	Aug. 31, 2013 6.500% Senior Notes due January 2014, Effective Interest Rate of 6.63% [Member]	May 10, 2014 5.750% Senior Notes due January 2015, Effective Interest Rate of 5.89% [Member]	Aug. 31, 2013 5.750% Senior Notes due January 2015, Effective Interest Rate of 5.89% [Member]	May 10, 2014 5.500% Senior Notes due November 2015, Effective Interest Rate of 4.86% [Member]	Aug. 31, 2013 5.500% Senior Notes due November 2015, Effective Interest Rate of 4.86% [Member]	May 10, 2014 6.950% Senior Notes due June 2016, Effective Interest Rate of 7.09% [Member]	Aug. 31, 2013 6.950% Senior Notes due June 2016, Effective Interest Rate of 7.09% [Member]	Jan. 14, 2014 1.300% Senior Notes due January 2017, Effective Interest Rate of 1.43% [Member]	May 10, 2014 1.300% Senior Notes due January 2017, Effective Interest Rate of 1.43% [Member]	Aug. 31, 2013 1.300% Senior Notes due January 2017, Effective Interest Rate of 1.43% [Member]	May 10, 2014 7.125% Senior Notes due August 2018, Effective Interest Rate of 7.28% [Member]	Aug. 31, 2013 7.125% Senior Notes due August 2018, Effective Interest Rate of 7.28% [Member]	May 10, 2014 4.000% Senior Notes due November 2020, Effective Interest Rate of 4.43% [Member]	Aug. 31, 2013 4.000% Senior Notes due November 2020, Effective Interest Rate of 4.43% [Member]	May 10, 2014 3.700% Senior Notes due April 2022, Effective Interest Rate of 3.85% [Member]	Aug. 31, 2013 3.700% Senior Notes due April 2022, Effective Interest Rate of 3.85% [Member]	Nov. 13, 2012 2.875% Senior Notes due January 2023, Effective Interest Rate of 3.21% [Member]	May 10, 2014 2.875% Senior Notes due January 2023, Effective Interest Rate of 3.21% [Member]	Aug. 31, 2013 2.875% Senior Notes due January 2023, Effective Interest Rate of 3.21% [Member]	Apr. 29, 2013 3.125% Senior Notes due July 2023, Effective Interest Rate of 3.26% [Member]	May 10, 2014 3.125% Senior Notes due July 2023, Effective Interest Rate of 3.26% [Member]	Aug. 31, 2013 3.125% Senior Notes due July 2023, Effective Interest Rate of 3.26% [Member]
Debt Instrument [Line Items]
Stated interest rate percentage			6.50%	6.50%	6.50%	5.75%	5.75%	5.50%	5.50%	6.95%	6.95%	1.30%	1.30%	1.30%	7.125%	7.125%	4.00%	4.00%	3.70%	3.70%	2.875%	2.875%	2.875%	3.125%	3.125%	3.125%
Effective interest rate				6.63%	6.63%	5.89%	5.89%	4.86%	4.86%	7.09%	7.09%		1.43%	1.43%	7.28%	7.28%	4.43%	4.43%	3.85%	3.85%		3.21%	3.21%		3.26%	3.26%
Debt instrument, due date			January 2014	January 2014	January 2014	January 2015	January 2015	November 2015	November 2015	June 2016	June 2016	January 2017	January 2017	January 2017	August 2018	August 2018	November 2020	November 2020	April 2022	April 2022	January 2023	January 2023	January 2023	July 2023	July 2023	July 2023
Weighted average interest rate of commercial paper	0.26%	0.29%

XML

Derivative Financial Instruments - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	May 10, 2014	May 04, 2013	May 10, 2014	May 04, 2013
Offsetting [Abstract]
Derivative losses recorded in Accumulated other comprehensive loss			$ (11,700,000)
Net derivative income (losses) amortized into Interest Income (expense)	(42,000)	(405,000)	(126,000)	(1,236,000)
Net derivative loss expected to be reclassified over next 12 months	$ (182,000)		$ (182,000)

XML

Segment Reporting - Additional Information (Detail)	9 Months Ended
	May 10, 2014 Segment Store
Segment Reporting [Abstract]
Number of operating segments	3
Number of reportable segments	1
Number of automotive parts and accessories stores in the United States, Puerto Rico, Mexico, and Brazil	5,279

XML

Goodwill and Intangibles - Schedule of Changes in Carrying Amount of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	May 10, 2014
Goodwill [Line Items]
Net balance as of August 31, 2013	$ 367,829
Goodwill adjustments
Net balance as of May 10, 2014	367,829
Auto Parts Stores [Member]
Goodwill [Line Items]
Net balance as of August 31, 2013	302,645
Goodwill adjustments
Net balance as of May 10, 2014	302,645
Other [Member]
Goodwill [Line Items]
Net balance as of August 31, 2013	65,184
Goodwill adjustments
Net balance as of May 10, 2014	$ 65,184

XML

Share-Based Payments

9 Months Ended

May 10, 2014

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Share-Based Payments

Note B – Share-Based Payments

AutoZone recognizes compensation expense for share-based payments based on the fair value of the awards at the grant date. Share-based payments include stock option grants, restricted stock grants, restricted stock unit grants and the discount on shares sold to employees under share purchase plans. Additionally, directors’ fees are paid in restricted stock units with value equivalent to the value of shares of common stock as of the grant date. The change in fair value of liability-based stock awards is also recognized in share-based compensation expense.

Total share-based compensation expense (a component of Operating, selling, general and administrative expenses) was $8.3 million for the twelve week period ended May 10, 2014, and was $9.0 million for the comparable prior year period. Share-based compensation expense was $29.0 million for the thirty-six week period ended May 10, 2014, and was $25.6 million for the comparable prior year period.

During the thirty-six week period ended May 10, 2014, 194,130 shares of stock options were exercised at a weighted average exercise price of $177.95. In the comparable prior year period, 638,553 shares of stock options were exercised at a weighted average exercise price of $129.50.

The Company made stock option grants of 347,615 shares during the thirty-six week period ended May 10, 2014, and granted options to purchase 364,160 shares during the comparable prior year period. The weighted average fair value of the stock option awards granted during the thirty-six week periods ended May 10, 2014, and May 4, 2013, using the Black-Scholes-Merton multiple-option pricing valuation model, was $96.92 and $98.58 per share, respectively, using the following weighted average key assumptions:

	Thirty-Six Weeks Ended
	May 10, 2014			May 4, 2013
Expected price volatility		23	%		29	%
Risk-free interest rate		1.0	%		0.5	%
Weighted average expected lives (in years)		5.2			5.2
Forfeiture rate		9	%		10	%
Dividend yield		0	%		0	%

See AutoZone’s Annual Report on Form 10-K for the year ended August 31, 2013, for a discussion regarding the methodology used in developing AutoZone’s assumptions to determine the fair value of the option awards and a description of AutoZone’s 2011 Equity Incentive Award Plan and the 2011 Director Compensation Program.

For the twelve week period ended May 10, 2014, no stock options were excluded from the diluted earnings per share computation because they would have been anti-dilutive. For the comparable prior year period, 8,600 anti-dilutive shares were excluded from the dilutive earnings per share computation. No stock options were excluded from the diluted earnings per share computation for the thirty-six week period ended May 10, 2014, and 29,600 anti-dilutive shares were excluded for the comparable prior year period.

During the second quarter of fiscal 2014, the Company adopted the 2014 Director Compensation Program (the “Program”), which states that non-employee directors will receive their compensation in awards of restricted stock units under the 2011 Equity Incentive Award Plan, with an option for a certain portion of a director’s compensation to be paid in cash at the non-employee director’s election. The Program replaces the former 2011 Director Compensation Program. Under the Program, restricted stock units are granted January 1 of each year (the “Grant Date”). The number of restricted stock units is determined by dividing the amount of the annual retainer by the fair market value of the shares of common stock as of the Grant Date. The restricted stock units are fully vested on January 1 of each year and are paid in shares of the Company’s common stock on the earlier to occur of the fifth anniversary of the Grant Date or the date the non-employee director ceases to be a member of the Board (“Separation from Service”). Non-employee directors may elect to defer receipt of the restricted stock units until their Separation from Service. The cash portion of the award, if elected, is paid ratably over the remaining calendar quarters.

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Financing - Additional Information (Detail) (USD $)	9 Months Ended				9 Months Ended					0 Months Ended	3 Months Ended		1 Months Ended	3 Months Ended		0 Months Ended	3 Months Ended		1 Months Ended	0 Months Ended	3 Months Ended		0 Months Ended	3 Months Ended
	May 10, 2014	May 04, 2013	Dec. 31, 2013	Aug. 31, 2013	May 10, 2014 Capital Leases [Member]	Dec. 31, 2013 Capital Leases [Member]	May 10, 2014 Commercial paper, weighted average interest rate of 0.26% and 0.29% at May 10, 2014 and August 31, 2013, respectively [Member]	Aug. 31, 2013 Commercial paper, weighted average interest rate of 0.26% and 0.29% at May 10, 2014 and August 31, 2013, respectively [Member]	Dec. 31, 2013 Letters of Credit [Member]	Jan. 14, 2014 1.300% Senior Notes due January 2017, Effective Interest Rate of 1.43% [Member]	May 10, 2014 1.300% Senior Notes due January 2017, Effective Interest Rate of 1.43% [Member]	Aug. 31, 2013 1.300% Senior Notes due January 2017, Effective Interest Rate of 1.43% [Member]	Jan. 14, 2014 6.500% Senior Notes due January 2014, Effective Interest Rate of 6.63% [Member]	May 10, 2014 6.500% Senior Notes due January 2014, Effective Interest Rate of 6.63% [Member]	Aug. 31, 2013 6.500% Senior Notes due January 2014, Effective Interest Rate of 6.63% [Member]	Apr. 29, 2013 3.125% Senior Notes due July 2023, Effective Interest Rate of 3.26% [Member]	May 10, 2014 3.125% Senior Notes due July 2023, Effective Interest Rate of 3.26% [Member]	Aug. 31, 2013 3.125% Senior Notes due July 2023, Effective Interest Rate of 3.26% [Member]	Apr. 29, 2013 4.375% Senior Notes due June 2013, Effective Interest Rate of 5.65% [Member]	Nov. 13, 2012 2.875% Senior Notes due January 2023, Effective Interest Rate of 3.21% [Member]	May 10, 2014 2.875% Senior Notes due January 2023, Effective Interest Rate of 3.21% [Member]	Aug. 31, 2013 2.875% Senior Notes due January 2023, Effective Interest Rate of 3.21% [Member]	Nov. 13, 2012 5.875% Senior Notes due October 2012 [Member]	May 10, 2014 5.750% Senior Notes due January 2015, Effective Interest Rate of 5.89% [Member]	Aug. 31, 2013 5.750% Senior Notes due January 2015, Effective Interest Rate of 5.89% [Member]
Line of Credit Facility [Line Items]
Total debt	$ 4,378,400,000			$ 4,187,000,000			$ 928,400,000	$ 637,000,000			$ 400,000,000				$ 500,000,000		$ 500,000,000	$ 500,000,000			$ 300,000,000	$ 300,000,000		$ 500,000,000	$ 500,000,000
Senior notes non current																								284,800,000
Stated interest rate percentage										1.30%	1.30%	1.30%	6.50%	6.50%	6.50%	3.125%	3.125%	3.125%	4.375%	2.875%	2.875%	2.875%	5.875%	5.75%	5.75%
Debt instrument, due date										January 2017	January 2017	January 2017	January 2014	January 2014	January 2014	July 2023	July 2023	July 2023	June 2013	January 2023	January 2023	January 2023	October 2012	January 2015	January 2015
Remaining borrowing capacity under revolving credit facility	1,213,000,000
Amount available under credit facility	1,250,000,000		1,250,000,000
Expiration of credit facility	September 2017
Proceeds from issuance of debt	400,000,000	800,000,000								400,000,000						500,000,000				300,000,000
Debt repayment using commercial papers													500,000,000						200,000,000				300,000,000
Letter of credit facility, maximum borrowing capacity			1,500,000,000			175,000,000			200,000,000
Interest accrual on foreign currency loans the basis points					Interest accrues on Eurodollar loans at a defined Eurodollar rate, defined as LIBOR plus the applicable percentage, as defined in the revolving credit facility, depending upon the Company's senior, unsecured, (non-credit enhanced) long-term debt rating.
Fair value of the Company's debt	4,503,000,000			4,259,000,000
Excess (shortfall) of fair value of debt over (from) carrying value	$ 124,900,000			$ 72,200,000

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Segment Reporting (Tables)

9 Months Ended

May 10, 2014

Segment Reporting [Abstract]

Segment Results

The Company evaluates its reportable segment primarily on the basis of net sales and segment profit, which is defined as gross profit. Segment results for the periods presented were as follows:

	Twelve Weeks Ended						Thirty-Six Weeks Ended
(in thousands)	May 10, 2014			May 4, 2013			May 10, 2014			May 4, 2013
Net Sales
Auto Parts Stores	$	2,258,413		$	2,128,109		$	6,191,574		$	5,873,113
Other		83,132			77,769			234,043			179,003
Total	$	2,341,545		$	2,205,878		$	6,425,617		$	6,052,116
Segment Profit
Auto Parts Stores	$	1,171,098		$	1,100,083		$	3,210,084		$	3,024,122
Other		45,860			42,630			129,606			112,438
Gross profit		1,216,958			1,142,713			3,339,690			3,136,560
Operating, selling, general and administrative expenses		(738,006	)		(686,683	)		(2,139,668	)		(1,999,682	)
Interest expense, net		(36,162	)		(42,091	)		(118,083	)		(124,519	)
Income before income taxes	$	442,790		$	413,939		$	1,081,939		$	1,012,359

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Goodwill and Intangibles (Tables)

9 Months Ended

May 10, 2014

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill are as follows:

(in thousands)	Auto Parts Stores		Other		Total
Net balance as of August 31, 2013	$	302,645	$	65,184	$	367,829
Goodwill adjustments		—		—		—
Net balance as of May 10, 2014	$	302,645	$	65,184	$	367,829

Schedule of Carrying Amounts of Intangible Assets

The carrying amounts of intangible assets are included in Other long-term assets as follows:

(in thousands)	Estimated Useful Life		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Amortizing intangible assets:
Technology		3-5 years	$	10,570	$	(2,841	)	$	7,729
Noncompete agreements		5 years		1,300		(363	)		937
Customer relationships		3-10 years		48,376		(4,121	)		44,255
			$	60,246	$	(7,325	)		52,921
Non-amortizing intangible asset:
Trade name									24,600
Total intangible assets other than goodwill								$	77,521

Schedule of Future Amortization Expense for Finite Lived Intangible Assets

Total future amortization expense for intangible assets that have finite lives, based on the existing intangible assets and their current estimated useful lives as of May 10, 2014, is estimated as follows:

(in thousands)	Total
Remainder of fiscal 2014	$	2,652
2015		8,618
2016		8,618
2017		8,353
2018		6,725
Thereafter		17,955
	$	52,921

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Stock Repurchase Program - Additional Information (Detail) (USD $)	9 Months Ended		196 Months Ended	1 Months Ended	0 Months Ended	1 Months Ended	0 Months Ended	1 Months Ended	9 Months Ended
	May 10, 2014	May 04, 2013	May 10, 2014	May 10, 2014 Subsequent Event [Member]	Dec. 17, 2013 Minimum [Member]	Jun. 17, 2014 Minimum [Member] Subsequent Event [Member]	Dec. 17, 2013 Maximum [Member]	Jun. 17, 2014 Maximum [Member] Subsequent Event [Member]	May 10, 2014 Retained Deficit [Member]	May 04, 2013 Retained Deficit [Member]	May 10, 2014 Additional Paid-In Capital [Member]	May 04, 2013 Additional Paid-In Capital [Member]
Stock Repurchase Program [Line Items]
Stock repurchased cumulative, shares			136,500,000
Purchase of treasury stock			$ 13,843,000,000
Stock repurchased during period, shares	1,876,659			84,400
Stock repurchased during period, amount	911,500,000			44,400,000
Stock repurchase authorized during the period, value							750,000,000	750,000,000
Stock repurchase authorized amended value					13,400,000,000	14,150,000,000	14,150,000,000	14,900,000,000
Remaining value authorized for share repurchases	306,900,000		306,900,000	1,013,000,000
Treasury stock acquired repurchase authorization	From January 1, 1998 to May 10, 2014, the Company has repurchased a total of 136.5 million shares at an aggregate cost of $13,843 billion, including 1,876,659 shares of its common stock at an aggregate cost of $911.5 million during thirty-six week period ended May 10, 2014. On December 17, 2013, the Board voted to increase the authorization by $750 million to raise the cumulative share repurchase authorization from $13.4 billion to $14.15 billion. Considering the cumulative repurchases as of May 10, 2014, the Company had $306.9 million remaining under the Board’s authorization to repurchase its common stock.
Share of treasury stock retired	3,200,000	3,900,000
Treasury stock retired, cost method									$ 1,220,000,000	$ 1,362,000,000	$ 74,000,000	$ 75,700,000

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General - Additional Information (Detail)	9 Months Ended
	May 10, 2014
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Period of first quarter of fiscal year	84 days
Period of second quarter of fiscal year	84 days
Period of third quarter of fiscal year	84 days
Description of reporting periods	Operating results for the twelve and thirty-six weeks ended May 10, 2014, are not necessarily indicative of the results that may be expected for the fiscal year ending August 30, 2014. 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 quarter for fiscal 2014 has 16 weeks and for fiscal 2013 had 17 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.
Minimum [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Period of fourth quarter of fiscal year	112 days
Maximum [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Period of fourth quarter of fiscal year	119 days

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Share-Based Payments - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	May 10, 2014	May 04, 2013	May 10, 2014	May 04, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Total share-based compensation expense related to stock options and share purchase plans	$ 8.3	$ 9.0	$ 29.0	$ 25.6
Stock options exercised - Shares			194,130	638,553
Stock options exercised - Weighted average exercise price			$ 177.95	$ 129.50
Stock options granted			347,615	364,160
Weighted average grant date fair value of options granted			$ 96.92	$ 98.58
Anti-dilutive shares excluded from the computation of earnings per share	0	8,600	0	29,600

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General

9 Months Ended

May 10, 2014

Accounting Policies [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 31, 2013.

Operating results for the twelve and thirty-six weeks ended May 10, 2014, are not necessarily indicative of the results that may be expected for the fiscal year ending August 30, 2014. 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 quarter for fiscal 2014 has 16 weeks and for fiscal 2013 had 17 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 July 2012, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2012-02, Testing Indefinite-Lived Intangible Assets for Impairment. The purpose of ASU 2012-02 is to simplify how an entity tests for impairment of indefinite-lived intangible assets. Entities will assess qualitative factors to determine whether it is more likely than not that a long-lived intangible asset’s fair value is less than its carrying value. In instances where the fair value is determined to be less than the carrying value, entities will perform the two-step quantitative goodwill impairment test. The Company adopted this standard effective September 1, 2013, and it had no material impact on the consolidated financial statements.

In February 2013, the FASB issued ASU 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. Under ASU 2013-02, an entity is required to provide information about the amounts reclassified out of accumulated other comprehensive income (“AOCI”) by component. In addition, an entity is required to present, either on the face of the financial statements or in the notes, significant amounts reclassified out of AOCI by the respective line items of net income, but only if the amount reclassified is required to be reclassified in its entirety in the same reporting period. For amounts that are not required to be reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures that provide additional details about those amounts. ASU 2013-02 does not change the current requirements for reporting net income or other comprehensive income in the financial statements. The Company adopted this standard effective September 1, 2013, and it had no material impact on the consolidated financial statements.

Recently Issued Accounting Pronouncements: In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers. Under ASU 2014-09, an entity will recognize revenue when it transfers promised goods or services to customers in an amount that reflects what it expects in exchange for the goods or services. It also requires more detailed disclosures to enable users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The Company does not expect the provision of ASU 2014-09 to have a material impact on its consolidated financial statements. This update will be effective for the Company at the beginning of its fiscal 2018 year.

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Share-Based Payments - Weighted Average for Key Assumptions Used in Determining Fair Value of Options Granted and Related Share-Based Compensation Expense (Detail)	9 Months Ended
	May 10, 2014	May 04, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Expected price volatility	23.00%	29.00%
Risk-free interest rate	1.00%	0.50%
Weighted average expected lives (in years)	5 years 2 months 12 days	5 years 2 months 12 days
Forfeiture rate	9.00%	10.00%
Dividend yield	0.00%	0.00%

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Pension and Savings Plans - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	May 10, 2014
Compensation And Retirement Disclosure [Abstract]
Annual contributions by the Company to pension plans	$ 2.9
Expected contributions to the plan in fiscal 2014	$ 13.8

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Segment Reporting - Segment Results (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	May 10, 2014	May 04, 2013	May 10, 2014	May 04, 2013
Segment Reporting Information [Line Items]
Net sales	$ 2,341,545	$ 2,205,878	$ 6,425,617	$ 6,052,116
Gross profit	1,216,958	1,142,713	3,339,690	3,136,560
Operating, selling, general and administrative expenses	(738,006)	(686,683)	(2,139,668)	(1,999,682)
Interest expense, net	(36,162)	(42,091)	(118,083)	(124,519)
Income before income taxes	442,790	413,939	1,081,939	1,012,359
Auto Parts Stores [Member]
Segment Reporting Information [Line Items]
Net sales	2,258,413	2,128,109	6,191,574	5,873,113
Gross profit	1,171,098	1,100,083	3,210,084	3,024,122
Other [Member]
Segment Reporting Information [Line Items]
Net sales	83,132	77,769	234,043	179,003
Gross profit	$ 45,860	$ 42,630	$ 129,606	$ 112,438

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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	May 10, 2014	Aug. 31, 2013
Current assets:
Cash and cash equivalents	$ 145,349	$ 142,191
Accounts receivable	190,848	171,638
Merchandise inventories	3,133,350	2,861,014
Other current assets	112,047	101,443
Deferred income taxes	6,250	1,727
Total current assets	3,587,844	3,278,013
Property and equipment:
Property and equipment	5,322,299	5,058,525
Less: Accumulated depreciation and amortization	(2,129,010)	(1,987,164)
Property and equipment, net	3,193,289	3,071,361
Goodwill	367,829	367,829
Deferred income taxes	17,282	4,069
Other long-term assets	205,558	170,817
Other long-term assets, total	590,669	542,715
Assets	7,371,802	6,892,089
Current liabilities:
Accounts payable	3,574,921	3,307,535
Accrued expenses and other	470,719	467,831
Income taxes payable	141,801	17,129
Deferred income taxes	201,355	202,922
Short-term borrowings	215,156	173,733
Total current liabilities	4,603,952	4,169,150
Long-term debt	4,163,244	4,013,267
Other long-term liabilities	412,836	396,991
Commitments and contingencies
Stockholders' deficit:
Preferred stock, authorized 1,000 shares; no shares issued
Common stock, par value $.01 per share, authorized 200,000 shares; 33,811 shares issued and 32,613 shares outstanding as of May 10, 2014; 36,768 shares issued and 34,293 shares outstanding as of August 31, 2013	338	368
Additional paid-in capital	819,902	814,457
Retained deficit	(1,902,793)	(1,378,936)
Accumulated other comprehensive loss	(105,677)	(120,788)
Treasury stock, at cost	(620,000)	(1,002,420)
Total stockholders' deficit	(1,808,230)	(1,687,319)
Liabilities and Stockholders' Deficit	$ 7,371,802	$ 6,892,089

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Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	May 10, 2014	May 04, 2013	May 10, 2014	May 04, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (120,346)	$ (134,908)	$ (120,788)	$ (152,013)
Other comprehensive income (loss) before reclassifications	13,723	17,150	12,231	30,409
Amounts reclassified from Accumulated other comprehensive loss	946	2,276	2,880	6,122
Ending Balance	(105,677)	(115,482)	(105,677)	(115,482)
Pension Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(48,954)	(90,495)	(50,861)	(93,967)
Other comprehensive income (loss) before reclassifications			0
Amounts reclassified from Accumulated other comprehensive loss	957	2,038	2,864	5,510
Ending Balance	(47,997)	(88,457)	(47,997)	(88,457)
Foreign Currency [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(64,172)	(37,006)	(62,483)	(50,267)
Other comprehensive income (loss) before reclassifications	13,700	17,121	12,011	30,382
Amounts reclassified from Accumulated other comprehensive loss			0
Ending Balance	(50,472)	(19,885)	(50,472)	(19,885)
Net Unrealized Gain on Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	146	295	(25)	351
Other comprehensive income (loss) before reclassifications	23	29	220	27
Amounts reclassified from Accumulated other comprehensive loss	(36)	(17)	(62)	(71)
Ending Balance	133	307	133	307
Derivatives [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(7,366)	(7,702)	(7,419)	(8,130)
Other comprehensive income (loss) before reclassifications			0
Amounts reclassified from Accumulated other comprehensive loss	25	255	78	683
Ending Balance	$ (7,341)	$ (7,447)	$ (7,341)	$ (7,447)

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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	May 10, 2014	May 04, 2013	May 10, 2014	May 04, 2013
Statement Of Income And Comprehensive Income [Abstract]
Pension liability adjustments, taxes	$ 630	$ 1,296	$ 1,898	$ 4,489
Unrealized (losses) gains on marketable securities, taxes	7	7	85	24
Net derivative activities, taxes	$ 17	$ 150	$ 48	$ 408

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Marketable Securities - Available-for-Sale Marketable Securities (Detail) (USD $) In Thousands, unless otherwise specified	May 10, 2014	Aug. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	$ 85,802	$ 82,198
Available-For-Sale Marketable Securities, Gross Unrealized Gains	296	240
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(91)	(277)
Available-For-Sale Marketable Securities, Fair Value	86,007	82,161
Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	27,164	27,803
Available-For-Sale Marketable Securities, Gross Unrealized Gains	176	148
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(5)	(67)
Available-For-Sale Marketable Securities, Fair Value	27,335	27,884
Government Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	26,424	21,372
Available-For-Sale Marketable Securities, Gross Unrealized Gains	36	18
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(3)	(67)
Available-For-Sale Marketable Securities, Fair Value	26,457	21,323
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	6,113	7,198
Available-For-Sale Marketable Securities, Gross Unrealized Gains	28	24
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(83)	(138)
Available-For-Sale Marketable Securities, Fair Value	6,058	7,084
Asset-Backed Securities and Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	26,101	25,825
Available-For-Sale Marketable Securities, Gross Unrealized Gains	56	50
Available-For-Sale Marketable Securities, Gross Unrealized Losses		(5)
Available-For-Sale Marketable Securities, Fair Value	$ 26,157	$ 25,870

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Share-Based Payments (Tables)

9 Months Ended

May 10, 2014

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Weighted Average for Key Assumptions Used in Determining Fair Value of Options Granted and Related Share-Based Compensation Expense

The weighted average fair value of the stock option awards granted during the thirty-six week periods ended May 10, 2014, and May 4, 2013, using the Black-Scholes-Merton multiple-option pricing valuation model, was $96.92 and $98.58 per share, respectively, using the following weighted average key assumptions:

	Thirty-Six Weeks Ended
	May 10, 2014			May 4, 2013
Expected price volatility		23	%		29	%
Risk-free interest rate		1.0	%		0.5	%
Weighted average expected lives (in years)		5.2			5.2
Forfeiture rate		9	%		10	%
Dividend yield		0	%		0	%

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Marketable Securities - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended
	Feb. 15, 2014	May 10, 2014 Securities	Aug. 31, 2013
Investments Debt And Equity Securities [Abstract]
Available for sale securities debt maturity period range		Less than one year to approximately 3 years
Number of securities available for sale loss position		12
Available-For-Sale Marketable Securities, Gross Unrealized Losses		$ 91,000	$ 277,000
Marketable securities transferred	$ 28,200,000

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Marketable Securities (Tables)

9 Months Ended

May 10, 2014

Investments Debt And Equity Securities [Abstract]

Available-for-Sale Marketable Securities

The Company’s available-for-sale marketable securities consisted of the following:

	May 10, 2014
(in thousands)	Amortized Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate securities	$	27,164	$	176	$	(5	)	$	27,335
Government bonds		26,424		36		(3	)		26,457
Mortgage-backed securities		6,113		28		(83	)		6,058
Asset-backed securities and other		26,101		56		—			26,157
	$	85,802	$	296	$	(91	)	$	86,007

	August 31, 2013
(in thousands)	Amortized Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate securities	$	27,803	$	148	$	(67	)	$	27,884
Government bonds		21,372		18		(67	)		21,323
Mortgage-backed securities		7,198		24		(138	)		7,084
Asset-backed securities and other		25,825		50		(5	)		25,870
	$	82,198	$	240	$	(277	)	$	82,161

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	May 10, 2014	May 04, 2013
Cash flows from operating activities:
Net income	$ 696,074	$ 645,281
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of property and equipment and intangibles	172,286	155,932
Amortization of debt origination fees	4,895	5,857
Income tax benefit from exercise of stock options	(18,296)	(53,508)
Deferred income taxes	(21,234)	(16,296)
Share-based compensation expense	28,985	25,632
Changes in operating assets and liabilities:
Accounts receivable	(17,757)	9,151
Merchandise inventories	(267,801)	(155,059)
Accounts payable and accrued expenses	240,156	156,205
Income taxes payable	142,925	99,626
Other, net	10,885	23,043
Net cash provided by operating activities	971,118	895,864
Cash flows from investing activities:
Capital expenditures	(261,724)	(258,855)
Acquisition of business		(116,084)
Purchase of intangibles	(11,112)
Purchase of marketable securities	(28,616)	(26,808)
Proceeds from sale of marketable securities	25,013	20,290
Disposal of capital assets and other, net	1,471	7,350
Net cash used in investing activities	(274,968)	(374,107)
Cash flows from financing activities:
Net proceeds (payments) of commercial paper	291,400	(262,300)
Net payments of short-term borrowings		(4,945)
Proceeds from issuance of debt	400,000	800,000
Repayment of debt	(500,000)	(300,000)
Net proceeds from sale of common stock	34,412	82,817
Purchase of treasury stock	(911,537)	(827,348)
Income tax benefit from exercise of stock options	18,296	53,508
Payments of capital lease obligations	(24,248)	(19,824)
Other, net	(2,294)	(14,720)
Net cash used in financing activities	(693,971)	(492,812)
Effect of exchange rate changes on cash	979	1,647
Net increase in cash and cash equivalents	3,158	30,592
Cash and cash equivalents at beginning of period	142,191	103,093
Cash and cash equivalents at end of period	$ 145,349	$ 133,685

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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	May 10, 2014	Aug. 31, 2013
Statement Of Financial Position [Abstract]
Preferred stock, shares authorized	1,000	1,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	200,000	200,000
Common stock, shares issued	33,811	36,768
Common stock, shares outstanding	32,613	34,293

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Accumulated Other Comprehensive Loss

9 Months Ended

May 10, 2014

Equity [Abstract]

Accumulated Other Comprehensive Loss

Note J – Accumulated Other Comprehensive Loss

Accumulated other comprehensive loss includes certain adjustments to pension liabilities, foreign currency translation adjustments, certain activity for interest rate swaps and treasury rate locks that qualify as cash flow hedges and unrealized gains (losses) on available-for-sale securities. Changes in Accumulated other comprehensive loss for the twelve week periods ended May 10, 2014 and May 4, 2013, consisted of the following:

(in thousands)	Pension Liability			Foreign Currency (3)			Net Unrealized Gain on Securities			Derivatives			Total
Balance at February 15, 2014	$	(48,954	)	$	(64,172	)	$	146		$	(7,366	)	$	(120,346	)
Other comprehensive (loss) income before reclassifications		—			13,700			23			—			13,723
Amounts reclassified from Accumulated other comprehensive loss (1)		957	(2)		—			(36	)(4)		25	(5)		946
Balance at May 10, 2014	$	(47,997	)	$	(50,472	)	$	133		$	(7,341	)	$	(105,677	)

(in thousands)	Pension Liability			Foreign Currency (3)			Net Unrealized Gain on Securities			Derivatives			Total
Balance at February 9, 2013	$	(90,495	)	$	(37,006	)	$	295		$	(7,702	)	$	(134,908	)
Other comprehensive income (loss) before reclassifications		—			17,121			29			—			17,150
Amounts reclassified from Accumulated other comprehensive loss (1)		2,038	(2)		—			(17	)(4)		255	(5)		2,276
Balance at May 4, 2013	$	(88,457	)	$	(19,885	)	$	307		$	(7,447	)	$	(115,482	)

(1) Amounts in parentheses indicate debits to Accumulated other comprehensive loss.

(2) Represents amortization of pension liability adjustments, net of taxes of $630 for the twelve weeks ended May 10, 2014 and $1,296 for the twelve weeks ended May 4, 2013, which is recorded in Operating, selling, general and administrative expenses on the Condensed Consolidated Statements of Income. See “Note G – Pension and Savings Plans” for further discussion.

(3) Foreign currency is not shown net of additional U.S. tax as earnings of non-U.S. subsidiaries are intended to be permanently reinvested.

(4) Represents realized (losses) gains on marketable securities, net of taxes of $19 for the twelve weeks ended May 10, 2014 and $9 for the twelve weeks ended May 4, 2013, which is recorded in Operating, selling, general, and administrative expenses on the Condensed Consolidated Statements of Income. See “Note D – Marketable Securities” for further discussion.

(5) Represents gains and losses on derivatives, net of taxes of $17 for the twelve weeks ended May 10, 2014 and $150 for the twelve weeks ended May 4, 2013, which is recorded in Interest expense, net, on the Condensed Consolidated Statements of Income. See “Note E – Derivative Financial Instruments” for further discussion.

Changes in Accumulated other comprehensive loss for the thirty-six week periods ended May 10, 2014 and May 4, 2013, consisted of the following:

(in thousands)	Pension Liability			Foreign Currency (3)			Net Unrealized Gain on Securities			Derivatives			Total
Balance at August 31, 2013	$	(50,861	)	$	(62,483	)	$	(25	)	$	(7,419	)	$	(120,788	)
Other comprehensive income (loss) before reclassifications		—			12,011			220			—			12,231
Amounts reclassified from Accumulated other comprehensive loss (1)		2,864	(2)		—			(62	)(4)		78	(5)		2,880
Balance at May 10, 2014	$	(47,997	)	$	(50,472	)	$	133		$	(7,341	)	$	(105,677	)

(in thousands)	Pension Liability			Foreign Currency (3)			Net Unrealized Gain on Securities			Derivatives			Total
Balance at August 25, 2012	$	(93,967	)	$	(50,267	)	$	351		$	(8,130	)	$	(152,013	)
Other comprehensive (loss) income before reclassifications		—			30,382			27			—			30,409
Amounts reclassified from Accumulated other comprehensive loss (1)		5,510	(2)		—			(71	)(4)		683	(5)		6,122
Balance at May 4, 2013	$	(88,457	)	$	(19,885	)	$	307		$	(7,447	)	$	(115,482	)

(1) Amounts in parentheses indicate debits to Accumulated other comprehensive loss.

(2) Represents amortization of pension liability adjustments, net of taxes of $1,898 in fiscal 2014 and $4,489 in fiscal 2013, which is recorded in Operating, selling, general and administrative expenses on the Condensed Consolidated Statements of Income. See “Note G – Pension and Savings Plans” for further discussion.

(3) Foreign currency is not shown net of additional U.S. tax as earnings of non-U.S. subsidiaries are intended to be permanently reinvested.

(4) Represents realized (losses) gains on marketable securities, net of taxes of $33 in fiscal 2014 and $38 in fiscal 2013, which is recorded in Operating, selling, general, and administrative expenses on the Condensed Consolidated Statements of Income. See “Note D – Marketable Securities” for further discussion.

(5) Represents gains and losses on derivatives, net of taxes of $48 in fiscal 2014 and $408 is fiscal 2013, which is recorded in Interest expense, net, on the Condensed Consolidated Statements of Income. See “Note E – Derivative Financial Instruments” for further discussion.

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Document and Entity Information	9 Months Ended
	May 10, 2014	Jun. 13, 2014
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	May 10, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q3
Entity Registrant Name	AUTOZONE INC
Entity Central Index Key	0000866787
Current Fiscal Year End Date	--08-30
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		32,600,155

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Goodwill and Intangibles

9 Months Ended

May 10, 2014

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Intangibles

Note K – Goodwill and Intangibles

The changes in the carrying amount of goodwill are as follows:

(in thousands)	Auto Parts Stores		Other		Total
Net balance as of August 31, 2013	$	302,645	$	65,184	$	367,829
Goodwill adjustments		—		—		—
Net balance as of May 10, 2014	$	302,645	$	65,184	$	367,829

The Company recorded an increase to intangible assets of $30.2 million during the thirty-six weeks ended May 10, 2014. During fiscal year 2014, the Company purchased the rights to certain customer relationships and technology assets relating to its ALLDATA operations. The carrying amounts of intangible assets are included in Other long-term assets as follows:

(in thousands)	Estimated Useful Life		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Amortizing intangible assets:
Technology		3-5 years	$	10,570	$	(2,841	)	$	7,729
Noncompete agreements		5 years		1,300		(363	)		937
Customer relationships		3-10 years		48,376		(4,121	)		44,255
			$	60,246	$	(7,325	)		52,921
Non-amortizing intangible asset:
Trade name									24,600
Total intangible assets other than goodwill								$	77,521

Amortization expense of intangible assets for the twelve and thirty-six week period ended May 10, 2014, was $2.0 million and $4.4 million, respectively. Amortization expense of intangible assets for the twelve and thirty-six week period ended May 4, 2013, was $0.9 million and $1.5 million, respectively.

Total future amortization expense for intangible assets that have finite lives, based on the existing intangible assets and their current estimated useful lives as of May 10, 2014, is estimated as follows:

(in thousands)	Total
Remainder of fiscal 2014	$	2,652
2015		8,618
2016		8,618
2017		8,353
2018		6,725
Thereafter		17,955
	$	52,921

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CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	May 10, 2014	May 04, 2013	May 10, 2014	May 04, 2013
Income Statement [Abstract]
Net sales	$ 2,341,545	$ 2,205,878	$ 6,425,617	$ 6,052,116
Cost of sales, including warehouse and delivery expenses	1,124,587	1,063,165	3,085,927	2,915,556
Gross profit	1,216,958	1,142,713	3,339,690	3,136,560
Operating, selling, general and administrative expenses	738,006	686,683	2,139,668	1,999,682
Operating profit	478,952	456,030	1,200,022	1,136,878
Interest expense, net	36,162	42,091	118,083	124,519
Income before income taxes	442,790	413,939	1,081,939	1,012,359
Income taxes	157,633	148,356	385,865	367,078
Net income	$ 285,157	$ 265,583	$ 696,074	$ 645,281
Weighted average shares for basic earnings per share	33,073	35,922	33,610	36,342
Effect of dilutive stock equivalents	643	607	607	666
Weighted average shares for diluted earnings per share	33,716	36,529	34,217	37,008
Basic earnings per share	$ 8.62	$ 7.39	$ 20.71	$ 17.76
Diluted earnings per share	$ 8.46	$ 7.27	$ 20.34	$ 17.44

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Derivative Financial Instruments

9 Months Ended

May 10, 2014

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

Note E – Derivative Financial Instruments

At May 10, 2014, the Company had $11.7 million recorded in Accumulated other comprehensive loss related to realized losses associated with terminated interest rate swap and treasury rate lock derivatives which were designated as hedging instruments. Net losses are amortized into Interest expense over the remaining life of the associated debt. During the twelve week period ended May 10, 2014, the Company reclassified $42 thousand of net losses from Accumulated other comprehensive loss to Interest expense. In the comparable prior year period, the Company reclassified $405 thousand from Accumulated other comprehensive loss to Interest expense. During the thirty-six week period ended May 10, 2014, the Company reclassified $126 thousand of net losses from Accumulated other comprehensive loss to Interest expense. In the comparable prior year period, the Company reclassified $1.2 million of net losses from Accumulated other comprehensive loss to Interest expense. The Company expects to reclassify $182 thousand of net losses from Accumulated other comprehensive loss to Interest expense over the next twelve months.

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Marketable Securities

9 Months Ended

May 10, 2014

Investments Debt And Equity Securities [Abstract]

Marketable Securities

Note D – Marketable Securities

The Company’s basis for determining the cost of a security sold is the “Specific Identification Model.” Unrealized gains (losses) on marketable securities are recorded in Accumulated other comprehensive loss. The Company’s available-for-sale marketable securities consisted of the following:

	May 10, 2014
(in thousands)	Amortized Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate securities	$	27,164	$	176	$	(5	)	$	27,335
Government bonds		26,424		36		(3	)		26,457
Mortgage-backed securities		6,113		28		(83	)		6,058
Asset-backed securities and other		26,101		56		—			26,157
	$	85,802	$	296	$	(91	)	$	86,007

	August 31, 2013
(in thousands)	Amortized Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate securities	$	27,803	$	148	$	(67	)	$	27,884
Government bonds		21,372		18		(67	)		21,323
Mortgage-backed securities		7,198		24		(138	)		7,084
Asset-backed securities and other		25,825		50		(5	)		25,870
	$	82,198	$	240	$	(277	)	$	82,161

The debt securities held at May 10, 2014, had effective maturities ranging from less than one year to approximately 3 years. The Company did not realize any material gains or losses on its marketable securities during the thirty-six week period ended May 10, 2014.

The Company holds 12 securities that are in an unrealized loss position of approximately $91 thousand at May 10, 2014. The Company has the intent and ability to hold these investments until recovery of fair value or maturity, and does not deem the investments to be impaired on an other than temporary basis. In evaluating whether the securities are deemed to be impaired on an other than temporary basis, the Company considers factors such as the duration and severity of the loss position, the credit worthiness of the investee, the term to maturity and the intent and ability to hold the investments until maturity or until recovery of fair value.

During the twelve week period ended February 15, 2014, the Company’s insurance captive transferred $28.2 million of its marketable securities to a trust account to secure its obligations to an insurance company related to future workers compensation and casualty losses. These securities held by the trust account are included above in total marketable securities.

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Fair Value Measurements (Tables)

9 Months Ended

May 10, 2014

Fair Value Disclosures [Abstract]

Company's Assets and Liabilities Measured at Fair Value on Recurring Basis

The Company’s assets and liabilities measured at fair value on a recurring basis were as follows:

	May 10, 2014
(in thousands)	Level 1		Level 2		Level 3		Fair Value
Other current assets	$	17,678	$	39	$	—	$	17,717
Other long-term assets		50,328		17,962		—		68,290
	$	68,006	$	18,001	$	—	$	86,007

	August 31, 2013
(in thousands)	Level 1		Level 2		Level 3		Fair Value
Other current assets	$	16,386	$	24	$	—	$	16,410
Other long-term assets		49,011		16,740		—		65,751
	$	65,397	$	16,764	$	—	$	82,161

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Litigation

9 Months Ended

May 10, 2014

Commitments And Contingencies Disclosure [Abstract]

Litigation

Note L – Litigation

In 2004, the Company acquired a store site in Mount Ephraim, New Jersey that had previously been the site of a gasoline service station and contained evidence of groundwater contamination. Upon acquisition, the Company voluntarily reported the groundwater contamination issue to the New Jersey Department of Environmental Protection and entered into a Voluntary Remediation Agreement providing for the remediation of the contamination associated with the property. The Company has conducted and paid for (at an immaterial cost to the Company) remediation of contamination on the property. The Company is also investigating, and will be addressing, potential vapor intrusion impacts in downgradient residences and businesses. The New Jersey Department of Environmental Protection has asserted, in a Directive and Notice to Insurers dated February 19, 2013 and again in an Amended Directive and Notice to Insurers dated January 13, 2014 (collectively the “Directives”), that the Company is liable for the downgradient impacts under a joint and severable liability theory. The Company has contested any such assertions due to the existence of other entities/sources of contamination, some of which are named in the Directives, in the area of the property. Pursuant to the Voluntary Remediation Agreement, upon completion of all remediation required by the agreement, the Company believes it should be eligible to be reimbursed up to 75 percent of qualified remediation costs by the State of New Jersey. The Company has asked the state for clarification that the agreement applies to off-site work, and the state is considering the request. Although the aggregate amount of additional costs that the Company may incur pursuant to the remediation cannot currently be ascertained, the Company does not currently believe that fulfillment of its obligations under the agreement or otherwise will result in costs that are material to its financial condition, results of operations or cash flow.

The Company is involved in various other legal proceedings incidental to the conduct of its business, including several lawsuits containing class-action allegations in which the plaintiffs are current and former hourly and salaried employees who allege various wage and hour violations and unlawful termination practices. The Company does not currently believe that, either individually or in the aggregate, these matters will result in liabilities material to the Company’s financial condition, results of operations or cash flows.

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Financing

9 Months Ended

May 10, 2014

Debt Disclosure [Abstract]

Financing

Note H – Financing

The Company’s long-term debt consisted of the following:

(in thousands)	May 10, 2014		August 31, 2013
6.500% Senior Notes due January 2014, effective interest rate of 6.63%	$	—	$	500,000
5.750% Senior Notes due January 2015, effective interest rate of 5.89%		500,000		500,000
5.500% Senior Notes due November 2015, effective interest rate of 4.86%		300,000		300,000
6.950% Senior Notes due June 2016, effective interest rate of 7.09%		200,000		200,000
1.300% Senior Notes due January 2017, effective interest rate of 1.43%		400,000		—
7.125% Senior Notes due August 2018, effective interest rate of 7.28%		250,000		250,000
4.000% Senior Notes due November 2020, effective interest rate of 4.43%		500,000		500,000
3.700% Senior Notes due April 2022, effective interest rate of 3.85%		500,000		500,000
2.875% Senior Notes due January 2023, effective interest rate of 3.21%		300,000		300,000
3.125% Senior Notes due July 2023, effective interest rate of 3.26%		500,000		500,000
Commercial paper, weighted average interest rate of 0.26% and 0.29% at May 10, 2014 and August 31, 2013, respectively		928,400		637,000
Total debt		4,378,400		4,187,000
Less: Short-term borrowings		215,156		173,733
Long-term debt	$	4,163,244	$	4,013,267

As of May 10, 2014, $928.4 million of commercial paper borrowings and $284.8 million of the 5.750% Senior Notes due January 2015 are classified as long-term in the accompanying Consolidated Balance Sheets as the Company has the ability and intent to refinance on a long-term basis through available capacity in its revolving credit facility. As of May 10, 2014, the Company had $1.213 billion of availability under its $1.25 billion revolving credit facility, expiring in September 2017, that would allow it to replace these short-term obligations with long-term financing.

On January 14, 2014, the Company issued $400 million in 1.300% Senior Notes due January 2017 under its shelf registration statement filed with the SEC on April 17, 2012 (the “Shelf Registration”). The Shelf Registration allows the Company to sell an indeterminate amount in debt securities to fund general corporate purposes, including repaying, redeeming or repurchasing outstanding debt and for working capital, capital expenditures, new store openings, stock repurchases and acquisitions. Proceeds from the debt issuance on January 14, 2014, were used to repay a portion of the $500 million in 6.500% Senior Notes due January 2014. The Company used commercial paper borrowings to repay the remainder of the 6.500% Senior Notes.

On April 29, 2013, the Company issued $500 million in 3.125% Senior Notes due July 2023 under its Shelf Registration. Proceeds from the debt issuance on April 29, 2013, were used to repay a portion of the outstanding commercial paper borrowings, which were used to repay the $200 million in 4.375% Senior Notes due in June 2013, and for general corporate purposes.

On November 13, 2012, the Company issued $300 million in 2.875% Senior Notes due January 2023 under its Shelf Registration. Proceeds from the debt issuance on November 13, 2012, were used to repay a portion of the outstanding commercial paper borrowings, which were used to repay the $300 million in 5.875% Senior Notes due in October 2012, and for general corporate purposes.

In December 2013, the Company amended and restated its revolving credit facility, increasing the capacity under the revolving credit facility to $1.25 billion. This credit facility is available to primarily support commercial paper borrowings, letters of credit and other short-term unsecured bank loans. The capacity of the credit facility may be increased to $1.5 billion prior to the maturity date at the Company’s election and subject to bank credit capacity and approval, may include up to $200 million in letters of credit and may include up to $175 million in capital leases each fiscal year. Under the revolving credit facility, the Company may borrow funds consisting of Eurodollar loans or base rate loans. Interest accrues on Eurodollar loans at a defined Eurodollar rate, defined as LIBOR plus the applicable percentage, as defined in the revolving credit facility, depending upon the Company’s senior, unsecured, (non-credit enhanced) long-term debt rating. Interest accrues on base rate loans as defined in the credit facility. The Company also has the option to borrow funds under the terms of a swingline loan subfacility. The revolving credit facility expires in September 2017.

The fair value of the Company’s debt was estimated at $4.503 billion as of May 10, 2014, and $4.259 billion as of August 31, 2013, based on the quoted market prices for the same or similar issues or on the current rates available to the Company for debt of the same terms (Level 2). Such fair value is greater than the carrying value of debt by $124.9 million at May 10, 2014, and $72.2 million at August 31, 2013.

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Merchandise Inventories

9 Months Ended

May 10, 2014

Inventory Disclosure [Abstract]

Merchandise Inventories

Note F – Merchandise Inventories

Inventories are stated at the lower of cost or market using the last-in, first-out (“LIFO”) method for domestic inventories and the first-in, first-out (“FIFO”) method for Mexico inventories. Included in inventories are related purchasing, storage and handling costs. Due to price deflation on the Company’s merchandise purchases, the Company’s domestic inventory balances are effectively maintained under the FIFO method. The Company’s policy is not to write up inventory in excess of replacement cost. The cumulative balance of this unrecorded adjustment, which will be reduced upon experiencing price inflation on the Company’s merchandise purchases, was $307.0 million at May 10, 2014, and $283.7 million at August 31, 2013.

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Pension and Savings Plans

9 Months Ended

May 10, 2014

Compensation And Retirement Disclosure [Abstract]

Pension and Savings Plans

Note G – Pension and Savings Plans

The components of net periodic pension expense related to the Company’s pension plans consisted of the following:

	Twelve Weeks Ended						Thirty-Six Weeks Ended
(in thousands)	May 10, 2014			May 4, 2013			May 10, 2014			May 4, 2013
Interest cost	$	3,016		$	2,659		$	9,048		$	7,977
Expected return on plan assets		(3,550	)		(3,083	)		(10,650	)		(9,249	)
Amortization of net loss		1,587			3,333			4,761			9,999
Net periodic pension expense	$	1,053		$	2,909		$	3,159		$	8,727

The Company makes contributions in amounts at least equal to the minimum funding requirements of the Employee Retirement Income Security Act of 1974, as amended by the Pension Protection Act of 2006. During the thirty-six week period ended May 10, 2014, the Company made contributions to its funded plan in the amount of $2.9 million. The Company expects to contribute approximately $13.8 million to the plan during the remainder of fiscal 2014; however, a change to the expected cash funding may be impacted by a change in interest rates or a change in the actual or expected return on plan assets.

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Stock Repurchase Program

9 Months Ended

May 10, 2014

Equity [Abstract]

Stock Repurchase Program

Note I – Stock Repurchase Program

From January 1, 1998 to May 10, 2014, the Company has repurchased a total of 136.5 million shares at an aggregate cost of $13.843 billion, including 1,876,659 shares of its common stock at an aggregate cost of $911.5 million during thirty-six week period ended May 10, 2014. On December 17, 2013, the Board voted to increase the authorization by $750 million to raise the cumulative share repurchase authorization from $13.4 billion to $14.15 billion. Considering the cumulative repurchases as of May 10, 2014, the Company had $306.9 million remaining under the Board’s authorization to repurchase its common stock.

On June 17, 2014, the Board voted to increase the authorization by $750 million to raise the cumulative share repurchase authorization from $14.15 billion to $14.9 billion. Subsequent to May 10, 2014, the Company has repurchased 84,400 shares of its common stock at an aggregate cost of $44.4 million. Considering the cumulative repurchases and the increase in authorization subsequent to May 10, 2014, the Company has $1.013 billion remaining under the Board’s authorization to repurchase its common stock.

During the thirty-six week period ended May 10, 2014, the Company retired 3.2 million shares of treasury stock which had previously been repurchased under the Company’s share repurchase program. The retirement increased Retained deficit by $1.220 billion and decreased Additional paid-in capital by $74.0 million. During the comparable prior year period, the Company retired 3.9 million shares of treasury stock, which increased Retained deficit by $1.362 billion and decreased Additional paid-in capital by $75.7 million.

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Fair Value Measurements - Additional Information (Detail) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	May 10, 2014	Aug. 31, 2013
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term marketable securities	$ 17,717	$ 16,410
Long-term marketable securities	$ 68,290	$ 65,751

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Litigation - Additional Information (Detail)	9 Months Ended
	May 10, 2014
Commitments And Contingencies Disclosure [Abstract]
Site contingency, recovery from third party of environmental remediation cost	In 2004, the Company acquired a store site in Mount Ephraim, New Jersey that had previously been the site of a gasoline service station and contained evidence of groundwater contamination. Upon acquisition, the Company voluntarily reported the groundwater contamination issue to the New Jersey Department of Environmental Protection and entered into a Voluntary Remediation Agreement providing for the remediation of the contamination associated with the property. The Company has conducted and paid for (at an immaterial cost to the Company) remediation of contamination on the property. The Company is also investigating, and will be addressing, potential vapor intrusion impacts in downgradient residences and businesses. The New Jersey Department of Environmental Protection has asserted, in a Directive and Notice to Insurers dated February 19, 2013 and again in an Amended Directive and Notice to Insurers dated January 13, 2014 (collectively the “Directives”), that the Company is liable for the downgradient impacts under a joint and severable liability theory. The Company has contested any such assertions due to the existence of other entities/sources of contamination, some of which are named in the Directives, in the area of the property Pursuant to the Voluntary Remediation Agreement. Upon completion of all remediation required by the agreement, the Company believes it should be eligible to be reimbursed up to 75 percent of qualified remediation costs by the State of New Jersey. The Company has asked the state for clarification that the agreement applies to off-site work, and the state is considering the request. Although the aggregate amount of additional costs that the Company may incur pursuant to the remediation cannot currently be ascertained, the Company does not currently believe that fulfillment of its obligations under the agreement or otherwise will result in costs that are material to its financial condition, results of operations or cash flow.
Reimbursable remediation costs	75.00%

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General (Policies)

9 Months Ended

May 10, 2014

Accounting Policies [Abstract]

Fiscal Period

Operating results for the twelve and thirty-six weeks ended May 10, 2014, are not necessarily indicative of the results that may be expected for the fiscal year ending August 30, 2014. 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 quarter for fiscal 2014 has 16 weeks and for fiscal 2013 had 17 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

Recently Adopted Accounting Pronouncements: In July 2012, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2012-02, Testing Indefinite-Lived Intangible Assets for Impairment. The purpose of ASU 2012-02 is to simplify how an entity tests for impairment of indefinite-lived intangible assets. Entities will assess qualitative factors to determine whether it is more likely than not that a long-lived intangible asset’s fair value is less than its carrying value. In instances where the fair value is determined to be less than the carrying value, entities will perform the two-step quantitative goodwill impairment test. The Company adopted this standard effective September 1, 2013, and it had no material impact on the consolidated financial statements.

In February 2013, the FASB issued ASU 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. Under ASU 2013-02, an entity is required to provide information about the amounts reclassified out of accumulated other comprehensive income (“AOCI”) by component. In addition, an entity is required to present, either on the face of the financial statements or in the notes, significant amounts reclassified out of AOCI by the respective line items of net income, but only if the amount reclassified is required to be reclassified in its entirety in the same reporting period. For amounts that are not required to be reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures that provide additional details about those amounts. ASU 2013-02 does not change the current requirements for reporting net income or other comprehensive income in the financial statements. The Company adopted this standard effective September 1, 2013, and it had no material impact on the consolidated financial statements.

Recently Issued Accounting Pronouncements

Recently Issued Accounting Pronouncements: In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers. Under ASU 2014-09, an entity will recognize revenue when it transfers promised goods or services to customers in an amount that reflects what it expects in exchange for the goods or services. It also requires more detailed disclosures to enable users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The Company does not expect the provision of ASU 2014-09 to have a material impact on its consolidated financial statements. This update will be effective for the Company at the beginning of its fiscal 2018 year.

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Financing (Tables)

9 Months Ended

May 10, 2014

Debt Disclosure [Abstract]

Schedule of Long-term Debt

The Company’s long-term debt consisted of the following:

(in thousands)	May 10, 2014		August 31, 2013
6.500% Senior Notes due January 2014, effective interest rate of 6.63%	$	—	$	500,000
5.750% Senior Notes due January 2015, effective interest rate of 5.89%		500,000		500,000
5.500% Senior Notes due November 2015, effective interest rate of 4.86%		300,000		300,000
6.950% Senior Notes due June 2016, effective interest rate of 7.09%		200,000		200,000
1.300% Senior Notes due January 2017, effective interest rate of 1.43%		400,000		—
7.125% Senior Notes due August 2018, effective interest rate of 7.28%		250,000		250,000
4.000% Senior Notes due November 2020, effective interest rate of 4.43%		500,000		500,000
3.700% Senior Notes due April 2022, effective interest rate of 3.85%		500,000		500,000
2.875% Senior Notes due January 2023, effective interest rate of 3.21%		300,000		300,000
3.125% Senior Notes due July 2023, effective interest rate of 3.26%		500,000		500,000
Commercial paper, weighted average interest rate of 0.26% and 0.29% at May 10, 2014 and August 31, 2013, respectively		928,400		637,000
Total debt		4,378,400		4,187,000
Less: Short-term borrowings		215,156		173,733
Long-term debt	$	4,163,244	$	4,013,267

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Goodwill and Intangibles - Schedule of Carrying Amounts of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	May 10, 2014
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	$ 60,246
Finite Lived, Accumulated Amortization	(7,325)
Finite Lived, Net Carrying Amount	52,921
Total intangible assets other than goodwill, Net Carrying Amount	77,521
Technology [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	10,570
Finite Lived, Accumulated Amortization	(2,841)
Finite Lived, Net Carrying Amount	7,729
Technology [Member] | Minimum [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	3 years
Technology [Member] | Maximum [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Noncompete Agreements [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	1,300
Finite Lived, Accumulated Amortization	(363)
Finite Lived, Net Carrying Amount	937
Noncompete Agreements [Member] | Maximum [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Customer Relationships [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	48,376
Finite Lived, Accumulated Amortization	(4,121)
Finite Lived, Net Carrying Amount	44,255
Customer Relationships [Member] | Minimum [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	3 years
Customer Relationships [Member] | Maximum [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	10 years
Trade Name [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Non-amortizing intangible asset - Trade name, Net Carrying Amount	$ 24,600

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Financing - Schedule of Long-term Debt (Detail) (USD $) In Thousands, unless otherwise specified	May 10, 2014	Aug. 31, 2013
Debt Instrument [Line Items]
Total debt	$ 4,378,400	$ 4,187,000
Less: Short-term borrowings	215,156	173,733
Long-term debt	4,163,244	4,013,267
6.500% Senior Notes due January 2014, Effective Interest Rate of 6.63% [Member]
Debt Instrument [Line Items]
Total debt		500,000
5.750% Senior Notes due January 2015, Effective Interest Rate of 5.89% [Member]
Debt Instrument [Line Items]
Total debt	500,000	500,000
5.500% Senior Notes due November 2015, Effective Interest Rate of 4.86% [Member]
Debt Instrument [Line Items]
Total debt	300,000	300,000
6.950% Senior Notes due June 2016, Effective Interest Rate of 7.09% [Member]
Debt Instrument [Line Items]
Total debt	200,000	200,000
1.300% Senior Notes due January 2017, Effective Interest Rate of 1.43% [Member]
Debt Instrument [Line Items]
Total debt	400,000
7.125% Senior Notes due August 2018, Effective Interest Rate of 7.28% [Member]
Debt Instrument [Line Items]
Total debt	250,000	250,000
4.000% Senior Notes due November 2020, Effective Interest Rate of 4.43% [Member]
Debt Instrument [Line Items]
Total debt	500,000	500,000
3.700% Senior Notes due April 2022, Effective Interest Rate of 3.85% [Member]
Debt Instrument [Line Items]
Total debt	500,000	500,000
2.875% Senior Notes due January 2023, Effective Interest Rate of 3.21% [Member]
Debt Instrument [Line Items]
Total debt	300,000	300,000
3.125% Senior Notes due July 2023, Effective Interest Rate of 3.26% [Member]
Debt Instrument [Line Items]
Total debt	500,000	500,000
Commercial paper, weighted average interest rate of 0.26% and 0.29% at May 10, 2014 and August 31, 2013, respectively [Member]
Debt Instrument [Line Items]
Total debt	$ 928,400	$ 637,000

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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	May 10, 2014		May 04, 2013		May 10, 2014		May 04, 2013
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 285,157		$ 265,583		$ 696,074		$ 645,281
Other comprehensive income:
Pension liability adjustments, net of taxes	957	[1]	2,038	[1]	2,864	[1]	5,510	[1]
Foreign currency translation adjustments	13,700		17,121		12,011		30,382
Unrealized (losses) gains on marketable securities, net of taxes	(13)	[2]	12	[2]	158	[2]	(44)	[2]
Net derivative activities, net of taxes	25	[3]	255	[3]	78	[3]	683	[3]
Total other comprehensive income	14,669		19,426		15,111		36,531
Comprehensive income	$ 299,826		$ 285,009		$ 711,185		$ 681,812

[1] Pension liability adjustments are presented net of taxes of $630 in fiscal 2014 and $1,296 in fiscal 2013 for the twelve weeks ended and $1,898 in fiscal 2014 and $4,489 in fiscal 2013 for the thirty-six weeks ended

[2] Unrealized (losses) gains on marketable securities are presented net of taxes of $7 in fiscal 2014 and $7 in fiscal 2013 for the twelve weeks ended and $85 in fiscal 2014 and $24 in fiscal 2013 for the thirty-six weeks ended

[3] Net derivative activities are presented net of taxes of $17 in fiscal 2014 and $150 in fiscal 2013 for the twelve weeks ended and $48 in fiscal 2014 and $408 in fiscal 2013 for the thirty-six weeks ended

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Fair Value Measurements

9 Months Ended

May 10, 2014

Fair Value Disclosures [Abstract]

Fair Value Measurements

Note C – Fair Value Measurements

The Company defines fair value as the price received to transfer an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The Company uses a hierarchy of valuation inputs to measure fair value.

The hierarchy prioritizes the inputs into three broad levels:

Level 1 inputs—unadjusted quoted prices in active markets for identical assets or liabilities that the Company has the ability to access. An active market for the asset or liability is one in which transactions for the asset or liability occur with sufficient frequency and volume to provide ongoing pricing information.

Level 2 inputs—inputs other than quoted market prices included in Level 1 that are observable, either directly or indirectly, for the asset or liability. Level 2 inputs include, but are not limited to, quoted prices for similar assets or liabilities in an active market, quoted prices for identical or similar assets or liabilities in markets that are not active and inputs other than quoted market prices that are observable for the asset or liability, such as interest rate curves and yield curves observable at commonly quoted intervals, volatilities, credit risk and default rates.

Level 3 inputs—unobservable inputs for the asset or liability.

Financial Assets & Liabilities Measured at Fair Value on a Recurring Basis

The Company’s assets and liabilities measured at fair value on a recurring basis were as follows:

	May 10, 2014
(in thousands)	Level 1		Level 2		Level 3		Fair Value
Other current assets	$	17,678	$	39	$	—	$	17,717
Other long-term assets		50,328		17,962		—		68,290
	$	68,006	$	18,001	$	—	$	86,007

	August 31, 2013
(in thousands)	Level 1		Level 2		Level 3		Fair Value
Other current assets	$	16,386	$	24	$	—	$	16,410
Other long-term assets		49,011		16,740		—		65,751
	$	65,397	$	16,764	$	—	$	82,161

At May 10, 2014, the fair value measurement amounts for assets and liabilities recorded in the accompanying Condensed Consolidated Balance Sheet consisted of short-term marketable securities of $17.7 million, which are included within Other current assets, and long-term marketable securities of $68.3 million, which are included in Other long-term assets. The Company’s marketable securities are typically valued at the closing price in the principal active market as of the last business day of the quarter or through the use of other market inputs relating to the securities, including benchmark yields and reported trades. The fair values of the marketable securities, by asset class, are described in “Note D – Marketable Securities.”

Non-Financial Assets measured at Fair Value on a Non-Recurring Basis

Non-financial assets are required to be measured at fair value on a non-recurring basis in certain circumstances, including the event of impairment. The assets could include assets acquired in an acquisition as well as property, plant and equipment that are determined to be impaired. During the thirty-six week periods ended May 10, 2014 and May 4, 2013, the Company did not have any significant non-financial assets measured at fair value on a non-recurring basis in periods subsequent to initial recognition.

Financial Instruments not Recognized at Fair Value

The Company has financial instruments, including cash and cash equivalents, accounts receivable, other current assets and accounts payable. The carrying amounts of these financial instruments approximate fair value because of their short maturities. A discussion of the carrying values and fair values of the Company’s debt is included in “Note H – Financing.”

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Accumulated Other Comprehensive Loss (Tables)

9 Months Ended

May 10, 2014

Equity [Abstract]

Changes in Accumulated Other Comprehensive Loss

Changes in Accumulated other comprehensive loss for the twelve week periods ended May 10, 2014 and May 4, 2013, consisted of the following:

(in thousands)	Pension Liability			Foreign Currency (3)			Net Unrealized Gain on Securities			Derivatives			Total
Balance at February 15, 2014	$	(48,954	)	$	(64,172	)	$	146		$	(7,366	)	$	(120,346	)
Other comprehensive (loss) income before reclassifications		—			13,700			23			—			13,723
Amounts reclassified from Accumulated other comprehensive loss (1)		957	(2)		—			(36	)(4)		25	(5)		946
Balance at May 10, 2014	$	(47,997	)	$	(50,472	)	$	133		$	(7,341	)	$	(105,677	)

(in thousands)	Pension Liability			Foreign Currency (3)			Net Unrealized Gain on Securities			Derivatives			Total
Balance at February 9, 2013	$	(90,495	)	$	(37,006	)	$	295		$	(7,702	)	$	(134,908	)
Other comprehensive income (loss) before reclassifications		—			17,121			29			—			17,150
Amounts reclassified from Accumulated other comprehensive loss (1)		2,038	(2)		—			(17	)(4)		255	(5)		2,276
Balance at May 4, 2013	$	(88,457	)	$	(19,885	)	$	307		$	(7,447	)	$	(115,482	)

(1) Amounts in parentheses indicate debits to Accumulated other comprehensive loss.

(2) Represents amortization of pension liability adjustments, net of taxes of $630 for the twelve weeks ended May 10, 2014 and $1,296 for the twelve weeks ended May 4, 2013, which is recorded in Operating, selling, general and administrative expenses on the Condensed Consolidated Statements of Income. See “Note G – Pension and Savings Plans” for further discussion.

(3) Foreign currency is not shown net of additional U.S. tax as earnings of non-U.S. subsidiaries are intended to be permanently reinvested.

(4) Represents realized (losses) gains on marketable securities, net of taxes of $19 for the twelve weeks ended May 10, 2014 and $9 for the twelve weeks ended May 4, 2013, which is recorded in Operating, selling, general, and administrative expenses on the Condensed Consolidated Statements of Income. See “Note D – Marketable Securities” for further discussion.

(5) Represents gains and losses on derivatives, net of taxes of $17 for the twelve weeks ended May 10, 2014 and $150 for the twelve weeks ended May 4, 2013, which is recorded in Interest expense, net, on the Condensed Consolidated Statements of Income. See “Note E – Derivative Financial Instruments” for further discussion.

Changes in Accumulated other comprehensive loss for the thirty-six week periods ended May 10, 2014 and May 4, 2013, consisted of the following:

(in thousands)	Pension Liability			Foreign Currency (3)			Net Unrealized Gain on Securities			Derivatives			Total
Balance at August 31, 2013	$	(50,861	)	$	(62,483	)	$	(25	)	$	(7,419	)	$	(120,788	)
Other comprehensive income (loss) before reclassifications		—			12,011			220			—			12,231
Amounts reclassified from Accumulated other comprehensive loss (1)		2,864	(2)		—			(62	)(4)		78	(5)		2,880
Balance at May 10, 2014	$	(47,997	)	$	(50,472	)	$	133		$	(7,341	)	$	(105,677	)

(in thousands)	Pension Liability			Foreign Currency (3)			Net Unrealized Gain on Securities			Derivatives			Total
Balance at August 25, 2012	$	(93,967	)	$	(50,267	)	$	351		$	(8,130	)	$	(152,013	)
Other comprehensive (loss) income before reclassifications		—			30,382			27			—			30,409
Amounts reclassified from Accumulated other comprehensive loss (1)		5,510	(2)		—			(71	)(4)		683	(5)		6,122
Balance at May 4, 2013	$	(88,457	)	$	(19,885	)	$	307		$	(7,447	)	$	(115,482	)

(1) Amounts in parentheses indicate debits to Accumulated other comprehensive loss.

(2) Represents amortization of pension liability adjustments, net of taxes of $1,898 in fiscal 2014 and $4,489 in fiscal 2013, which is recorded in Operating, selling, general and administrative expenses on the Condensed Consolidated Statements of Income. See “Note G – Pension and Savings Plans” for further discussion.

(3) Foreign currency is not shown net of additional U.S. tax as earnings of non-U.S. subsidiaries are intended to be permanently reinvested.

(4) Represents realized (losses) gains on marketable securities, net of taxes of $33 in fiscal 2014 and $38 in fiscal 2013, which is recorded in Operating, selling, general, and administrative expenses on the Condensed Consolidated Statements of Income. See “Note D – Marketable Securities” for further discussion.

(5) Represents gains and losses on derivatives, net of taxes of $48 in fiscal 2014 and $408 is fiscal 2013, which is recorded in Interest expense, net, on the Condensed Consolidated Statements of Income. See “Note E – Derivative Financial Instruments” for further discussion.

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Merchandise Inventories - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	May 10, 2014	Aug. 31, 2013
Inventory Disclosure [Abstract]
Unrecorded adjustment for LIFO value in excess of replacement value	$ 307.0	$ 283.7

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Segment Reporting

9 Months Ended

May 10, 2014

Segment Reporting [Abstract]

Segment Reporting

Note M – Segment Reporting

The Company’s three operating segments (Domestic Auto Parts, Mexico, and Brazil) are aggregated as one reportable segment: Auto Parts Stores. The criteria the Company used to identify the reportable segment are primarily the nature of the products the Company sells and the operating results that are regularly reviewed by the Company’s chief operating decision maker to make decisions about the resources to be allocated to the business units and to assess performance. The accounting policies of the Company’s reportable segment are the same as those described in Note A in its Annual Report on Form 10-K for the year ended August 31, 2013.

The Auto Parts Stores segment is a retailer and distributor of automotive parts and accessories through the Company’s 5,279 stores in the United States, Puerto Rico, Mexico, and Brazil. Each store carries an extensive product line for cars, sport utility vehicles, vans and light trucks, including new and remanufactured automotive hard parts, maintenance items, accessories and non-automotive products.

The Other category reflects business activities of three operating segments that are not separately reportable due to the materiality of these operating segments. The operating segments include ALLDATA, which produces, sells and maintains diagnostic and repair information software used in the automotive repair industry; E-commerce, which includes direct sales to customers through www.autozone.com; and AutoAnything, which includes direct sales to customers through www.autoanything.com.

The Company evaluates its reportable segment primarily on the basis of net sales and segment profit, which is defined as gross profit. Segment results for the periods presented were as follows:

	Twelve Weeks Ended						Thirty-Six Weeks Ended
(in thousands)	May 10, 2014			May 4, 2013			May 10, 2014			May 4, 2013
Net Sales
Auto Parts Stores	$	2,258,413		$	2,128,109		$	6,191,574		$	5,873,113
Other		83,132			77,769			234,043			179,003
Total	$	2,341,545		$	2,205,878		$	6,425,617		$	6,052,116
Segment Profit
Auto Parts Stores	$	1,171,098		$	1,100,083		$	3,210,084		$	3,024,122
Other		45,860			42,630			129,606			112,438
Gross profit		1,216,958			1,142,713			3,339,690			3,136,560
Operating, selling, general and administrative expenses		(738,006	)		(686,683	)		(2,139,668	)		(1,999,682	)
Interest expense, net		(36,162	)		(42,091	)		(118,083	)		(124,519	)
Income before income taxes	$	442,790		$	413,939		$	1,081,939		$	1,012,359