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 February 9, 2013, 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 – 36,080,610 shares outstanding as of March 4, 2013.

TABLE OF CONTENTS

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	4
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS	5
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS	6
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM	14
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	15
Item 3. Quantitative and Qualitative Disclosures About Market Risk	22
Item 4. Controls and Procedures	22
Item 4T. Controls and Procedures	22
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

2

PART I. FINANCIAL INFORMATION

Item 1. Financial Statements.

AUTOZONE, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

(in thousands)	February 9, 2013			August 25, 2012
Assets
Current assets:
Cash and cash equivalents	$	115,548		$	103,093
Accounts receivable		160,420			161,375
Merchandise inventories		2,758,543			2,627,983
Other current assets		87,789			85,649
Deferred income taxes		1,068			846
Total current assets		3,123,368			2,978,946
Property and equipment:
Property and equipment		4,839,902			4,659,761
Less: Accumulated depreciation and amortization		(1,895,353	)		(1,803,833	)
		2,944,549			2,855,928
Goodwill		385,985			302,645
Deferred income taxes		40,579			33,796
Other long-term assets		167,707			94,324
		594,271			430,765
	$	6,662,188		$	6,265,639
Liabilities and Stockholders’ Deficit
Current liabilities:
Accounts payable	$	3,034,017		$	2,926,740
Accrued expenses and other		462,858			478,085
Income taxes payable		69,063			17,053
Deferred income taxes		181,337			183,833
Short-term borrowings		484,533			49,881
Total current liabilities		4,231,808			3,655,592
Long-term debt		3,513,273			3,718,302
Other long-term liabilities		467,216			439,770
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; 36,410 shares issued and 36,079 shares outstanding as of February 9, 2013; 39,869 shares issued and 37,028 shares outstanding as of August 25, 2012		364			399
Additional paid-in capital		717,605			689,890
Retained deficit		(2,015,717	)		(1,033,197	)
Accumulated other comprehensive loss		(134,908	)		(152,013	)
Treasury stock, at cost		(117,453	)		(1,053,104	)
Total stockholders’ deficit		(1,550,109	)		(1,548,025	)
	$	6,662,188		$	6,265,639

See Notes to Condensed Consolidated Financial Statements.

3

AUTOZONE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(Unaudited)

	Twelve Weeks Ended				Twenty-Four Weeks Ended
(in thousands, except per share data)	February 9, 2013		February 11, 2012		February 9, 2013		February 11, 2012
Net sales	$	1,855,198	$	1,804,069	$	3,846,238	$	3,728,411
Cost of sales, including warehouse and delivery expenses		893,217		877,854		1,852,391		1,818,569
Gross profit		961,981		926,215		1,993,847		1,909,842
Operating, selling, general and administrative expenses		644,410		625,564		1,312,999		1,268,257
Operating profit		317,571		300,651		680,848		641,585
Interest expense, net		41,323		38,923		82,428		78,017
Income before income taxes		276,248		261,728		598,420		563,568
Income taxes		100,001		94,798		218,722		205,513
Net income	$	176,247	$	166,930	$	379,698	$	358,055
Weighted average shares for basic earnings per share		36,258		39,281		36,552		39,573
Effect of dilutive stock equivalents		646		956		694		978
Adjusted weighted average shares for diluted earnings per share		36,904		40,237		37,246		40,551
Basic earnings per share	$	4.86	$	4.25	$	10.39	$	9.05
Diluted earnings per share	$	4.78	$	4.15	$	10.19	$	8.83

See Notes to Condensed Consolidated Financial Statements.

AUTOZONE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)

	Twelve Weeks Ended					Twenty-Four Weeks Ended
(in thousands)	February 9, 2013			February 11, 2012		February 9, 2013			February 11, 2012
Net income	$	176,247		$	166,930	$	379,698		$	358,055
Other comprehensive loss (income):
Pension liability adjustments, net of taxes (1)		2,038			3,378		3,473			13,797
Foreign currency translation adjustments		15,320			20,726		13,261			(3,261	)
Unrealized (gains) losses on marketable securities, net of taxes (2)		(67	)		150		(57	)		(111	)
Net derivative activities, net of taxes (3)		263			255		428			3,132
Total other comprehensive loss		17,554			24,509		17,105			13,557
Comprehensive income	$	193,801		$	191,439	$	396,803		$	371,612

(1) Pension liability adjustments are presented net of taxes of $1,295 in fiscal 2013 and $1,117 in fiscal 2012 for the twelve weeks ended and $3,193 in fiscal 2013 and $9,276 in fiscal 2012 for the twenty-four weeks ended

(2) Unrealized (gains) losses on marketable securities are presented net of taxes of $36 in fiscal 2013 and $81 in fiscal 2012 for the twelve weeks ended and $31 in fiscal 2013 and $60 in fiscal 2012 for the twenty-four weeks ended

(3) Net derivative activities are presented net of taxes of $155 in fiscal 2013 and $150 in fiscal 2012 for the twelve weeks ended and $258 in fiscal 2013 and $2,320 in fiscal 2012 for the twenty-four weeks ended

See Notes to Condensed Consolidated Financial Statements.

4

AUTOZONE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

	Twenty-Four Weeks Ended
(in thousands)	February 9, 2013			February 11, 2012
Cash flows from operating activities:
Net income	$	379,698		$	358,055
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		103,044			96,170
Amortization of debt origination fees		3,905			3,573
Income tax benefit from exercise of stock options		(33,706	)		(21,793	)
Deferred income taxes		(12,911	)		5,956
Share-based compensation expense		16,616			15,045
Changes in operating assets and liabilities:
Accounts receivable		4,369			(3,796	)
Merchandise inventories		(123,177	)		(113,450	)
Accounts payable and accrued expenses		69,441			49,095
Income taxes payable		85,512			58,511
Other, net		18,052			13,848
Net cash provided by operating activities		510,843			461,214
Cash flows from investing activities:
Capital expenditures		(169,613	)		(132,430	)
Acquisition of business		(115,000	)		—
Purchase of marketable securities		(22,288	)		(18,970	)
Proceeds from sale of marketable securities		16,212			16,403
Disposal of capital assets and other, net		908			5,803
Net cash used in investing activities		(289,781	)		(129,194	)
Cash flows from financing activities:
Net proceeds from commercial paper		234,400			117,200
Net payments of short-term borrowings		(4,883	)		(3,548	)
Proceeds from issuance of debt		300,000			—
Repayment of debt		(300,000	)		—
Net proceeds from sale of common stock		53,423			33,050
Purchase of treasury stock		(502,348	)		(482,270	)
Income tax benefit from exercise of stock options		33,706			21,793
Payments of capital lease obligations		(14,728	)		(12,485	)
Other, net		(8,637	)		—
Net cash used in financing activities		(209,067	)		(326,260	)
Effect of exchange rate changes on cash		460			(159	)
Net increase in cash and cash equivalents		12,455			5,601
Cash and cash equivalents at beginning of period		103,093			97,606
Cash and cash equivalents at end of period	$	115,548		$	103,207

See Notes to Condensed Consolidated Financial Statements.

5

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 25, 2012.

Operating results for the twelve and twenty-four weeks ended February 9, 2013, are not necessarily indicative of the results that may be expected for the fiscal year ending August 31, 2013. 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 2013 has 17 weeks and for fiscal 2012 had 16 weeks. Additionally, the Company’s business is somewhat seasonal in nature, with the highest sales generally occurring during the months of February through September and the lowest sales generally occurring in the months of December and January.

Recently Issued Accounting Pronouncements: In February 2013, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) No. 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 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 does not expect the provision of ASU 2013-02 to have a material impact on its consolidated financial statements. This update will be effective for the Company at the beginning of its fiscal 2014 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 $8.5 million for the twelve week period ended February 9, 2013, and was $7.5 million for the comparable prior year period. Share-based compensation expense was $16.6 million for the twenty-four week period ended February 9, 2013, and was $15.0 million for the comparable prior year period.

During the twenty-four week period ended February 9, 2013, 413,485 shares of stock options were exercised at a weighted average exercise price of $129.00. In the comparable prior year period, 294,387 shares of stock options were exercised at a weighted average exercise price of $113.18.

The Company made stock option grants of 355,560 shares during the twenty-four week period ended February 9, 2013, and granted options to purchase 377,130 shares during the comparable prior year period. The weighted average fair value of the stock option awards granted during the twenty-four week periods ended February 9, 2013, and February 11, 2012, using the Black-Scholes-Merton multiple-option pricing valuation model, was $98.09 and $93.42 per share, respectively, using the following weighted average key assumptions:

	Twenty-Four Weeks Ended
	February 9, 2013			February 11, 2012
Expected price volatility		29	%		31	%
Risk-free interest rate		0.5	%		0.7	%
Weighted average expected lives (in years)		5.2			5.3
Forfeiture rate		10	%		10	%
Dividend yield		0	%		0	%

See AutoZone’s Annual Report on Form 10-K for the year ended August 25, 2012, 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.

6

For the twelve week period ended February 9, 2013, 375,980 stock options were excluded from the diluted earnings per share computation because they would have been anti-dilutive. For the comparable prior year period, 1,500 anti-dilutive shares were excluded from the dilutive earnings per share computation. There were 375,980 anti-dilutive shares excluded from the diluted earnings per share computation for the twenty-four week period ended February 9, 2013, and 1,500 anti-dilutive shares excluded for the comparable prior year period.

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:

	February 9, 2013
(in thousands)	Level 1		Level 2		Level 3			Fair Value
Short-term marketable securities	$	15,028	$	—	$	—		$	15,028
Long-term marketable securities		50,395		16,780		—			67,175
	$	65,423	$	16,780	$	—		$	82,203
Contingent consideration	$	—	$	—	$	(23,005	)	$	(23,005	)

	August 25, 2012
(in thousands)	Level 1		Level 2			Level 3		Fair Value
Short-term marketable securities	$	22,515	$	—		$	—	$	22,515
Long-term marketable securities		40,424		13,275			—		53,699
	$	62,939	$	13,275		$	—	$	76,214
Derivative instruments	$	—	$	(4,915	)	$	—	$	(4,915	)

At February 9, 2013, the fair value measurement amounts for assets and liabilities recorded in the accompanying Condensed Consolidated Balance Sheet consisted of short-term marketable securities of $15.0 million, which are included within Other current assets, and long-term marketable securities of $67.2 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”.

Effective December 19, 2012, the Company acquired certain assets and liabilities of AutoAnything, an online retailer of specialized automotive products for up to $150 million, including an initial cash payment of $115 million, a $5 million holdback payment for working capital true-ups, and contingent payments totaling up to $30 million. The contingent consideration is based on the performance of AutoAnything, and is not subject to continued employment by the selling stockholders. Based on specific operating income targets for each year, the sellers can receive up to $10 million in the first year, and up to $30 million in the second year, with contingent consideration not exceeding $30 million in the aggregate. As these performance-based contingent consideration payments are not subject to continued employment by the selling stockholders, the estimated fair value of the performance-based contingent consideration of $22.7 million was included as part of the purchase price allocation at the time of acquisition. The Company determined the fair value of the contingent consideration based on a probability-weighted discounted cash flow analysis. The fair value measurement is based on significant inputs not observable in the market and thus represents a Level 3 measurement as defined in the fair value hierarchy. In each period, the Company reassesses its current estimates of performance relative to the stated targets and adjusts the liability to fair value. As of February 9, 2013, the contingent liability is reflected as a current liability of $7.6 million in Accrued expenses and other and a non-current liability of $15.4 million in Other long-term liabilities in the accompanying Condensed Consolidated Balance Sheet. A discussion of the acquisition is included in “Note K – Acquisition”.

7

The change in the contingent consideration liability, which is a Level 3 liability measured at fair value on a recurring basis, is summarized as follows:

(in thousands)	Twelve Weeks  Ended February 9, 2013			Twenty-Four Weeks Ended February 9, 2013
Fair value – beginning of period	$	—		$	—
Fair value of contingent consideration issued during the period		(22,678	)		(22,678	)
Change in fair value		(327	)		(327	)
Fair value – end of period	$	(23,005	)	$	(23,005	)

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

Non-financial assets could be 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 twenty-four week periods ended February 9, 2013 and February 11, 2012, 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:

	February 9, 2013
(in thousands)	Amortized Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate securities	$	29,624	$	290	$	(3	)	$	29,911
Government bonds		21,575		58		(1	)		21,632
Mortgage-backed securities		8,453		23		(33	)		8,443
Asset-backed securities and other		22,097		120		—			22,217
	$	81,749	$	491	$	(37	)	$	82,203

	August 25, 2012
(in thousands)	Amortized Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate securities	$	26,215	$	307	$	—		$	26,522
Government bonds		20,790		117		(1	)		20,906
Mortgage-backed securities		4,369		17		(19	)		4,367
Asset-backed securities and other		24,299		120		—			24,419
	$	75,673	$	561	$	(20	)	$	76,214

The debt securities held at February 9, 2013, 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 twenty-four week period ended February 9, 2013.

The Company holds twelve securities that are in an unrealized loss position of approximately $37 thousand at February 9, 2013. 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.

8

Note E – Derivative Financial Instruments

During the fourth quarter of fiscal 2012, the Company entered into two treasury rate locks, each with a notional amount of $100 million. These agreements were cash flow hedges used to hedge the exposure to variability in future cash flows resulting from changes in variable interest rates related to the $300 million Senior Note debt issuance in November 2012. The fixed rates of the hedges were 2.07% and 1.92% and were benchmarked based on the 10-year U.S. treasury notes. These locks expired on November 1, 2012 and resulted in a loss of $5.1 million, which has been deferred in Accumulated other comprehensive loss and will be reclassified to Interest expense over the life of the underlying debt. The hedges remained highly effective until they expired, and no ineffectiveness was recognized in earnings.

During the third quarter of fiscal 2012, the Company entered into two treasury rate locks. These agreements were designated as cash flow hedges and were used to hedge the exposure to variability in future cash flows resulting from changes in variable interest rates related to the $500 million Senior Note debt issuance in April 2012. The treasury rate locks had notional amounts of $300 million and $100 million with associated fixed rates of 2.09% and 2.07% respectively. The locks were benchmarked based on the 10-year U.S. treasury notes. These locks expired on April 20, 2012 and resulted in a loss of $2.8 million, which has been deferred in Accumulated other comprehensive loss and will be reclassified to Interest expense over the life of the underlying debt. The hedges remained highly effective until they expired, and no ineffectiveness was recognized in earnings.

At February 9, 2013, the Company had $12.2 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 twenty-four week period ended February 9, 2013, the Company reclassified $831 thousand of net losses from Accumulated other comprehensive loss to Interest expense. In the comparable prior year period, the Company reclassified $813 thousand of net losses from Accumulated other comprehensive loss to Interest expense. The Company expects to reclassify $545 thousand of net losses from Accumulated other comprehensive loss to Interest expense over the next 12 months.

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 $280.7 million at February 9, 2013, and $270.4 million at August 25, 2012.

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						Twenty-Four Weeks Ended
(in thousands)	February  9, 2013			February  11, 2012			February  9, 2013			February  11, 2012
Interest cost	$	2,659		$	2,819		$	5,318		$	5,637
Expected return on plan assets		(3,083	)		(2,704	)		(6,166	)		(5,408	)
Amortization of net loss		3,333			2,260			6,666			4,521
Net periodic pension expense	$	2,909		$	2,375		$	5,818		$	4,750

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 twenty-four week period ended February 9, 2013, the Company made contributions to its funded plan in the amount of $4.1 million. The Company expects to contribute approximately $13.7 million to the plan during the remainder of fiscal 2013; 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.

9

Note H – Financing

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

(in thousands)	February 9, 2013			August 25, 2012
5.875% Senior Notes due October 2012, effective interest rate of 6.33%	$	—		$	300,000
4.375% Senior Notes due June 2013, effective interest rate of 5.65%		200,000			200,000
6.500% Senior Notes due January 2014, effective interest rate of 6.63%		500,000			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
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			—
Commercial paper, weighted average interest rate of 0.38% and 0.42% at February 9, 2013 and August 25, 2012, respectively		747,806			513,402
Unsecured, peso denominated borrowings, weighted average interest rate of 4.57% at August 25, 2012		—			4,781
Total debt		3,997,806			3,768,183
Less: Short-term borrowings		(484,533	)		(49,881	)
Long-term debt	$	3,513,273		$	3,718,302

As of February 9, 2013, $263.3 million of the commercial paper borrowings, the 4.375% Senior Notes due June 2013, and the 6.500% Senior Notes due January 2014, mature in the next twelve months, but are classified as long-term in the accompanying Condensed Consolidated Balance Sheets, as the Company has the ability and intent to refinance them on a long-term basis. Specifically, excluding the effect of commercial paper borrowings, the Company had $996.3 million of availability under its $1.0 billion revolving credit facility, expiring in September 2016, which would allow it to replace these short-term obligations with long-term financing.

As of February 9, 2013, the Company had $484.5 million of short-term borrowings that are scheduled to mature in the next twelve months. At August 25, 2012, the Company had $49.9 million of short-term borrowings that included $45.1 million of commercial paper borrowings and $4.8 million of unsecured, peso denominated borrowings.

On November 13, 2012, the Company issued $300 million in 2.875% Senior Notes due January 2023 under its 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 November 13, 2012, were used to repay a portion of the outstanding commercial paper borrowings, and for general corporate purposes.

In September 2011, the Company amended and restated its revolving credit facility, increasing the capacity under the revolving credit facility to $1.0 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 $1.250 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 2016.

The fair value of the Company’s debt was estimated at $4.242 billion as of February 9, 2013, and $4.055 billion as of August 25, 2012, 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 $244.4 million at February 9, 2013, and $286.6 million at August 25, 2012.

Note I – Stock Repurchase Program

From January 1, 1998 to February 9, 2013, the Company has repurchased a total of 132.5 million shares at an aggregate cost of $12.0 billion, including 1,367,832 shares of its common stock at an aggregate cost of $502.3 million during the twenty-four week period ended February 9, 2013. On September 28, 2012, the Board voted to increase the authorization by $750 million to raise the cumulative share repurchase authorization from $11.90 billion to $12.65 billion. Considering the cumulative repurchases as of February 9, 2013, the Company had $603.4 million remaining under the Board’s authorization to repurchase its common stock. The Company did not repurchase shares of its common stock subsequent to February 9, 2013.

During the twenty-four week period ended February 9, 2013, the Company retired 3.9 million shares of treasury stock which had previously been repurchased under the Company’s share repurchase program. The retirement increased Retained deficit by $1,362.2 million and decreased Additional paid-in capital by $75.7 million. During the comparable prior year period, the Company retired 4.9 million shares of treasury stock, which increased Retained deficit by $1,319.6 million and decreased Additional paid-in capital by $72.5 million.

10

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 consisted of the following:

(in thousands)	Pension Liability			Foreign Currency  (1)			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)		3,473			13,261			(57	)		428			17,105
Balance at February 9, 2013	$	(90,494	)	$	(37,006	)	$	294		$	(7,702	)	$	(134,908	)

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

Note K – Acquisition

Effective December 19, 2012, the Company acquired certain assets and liabilities of AutoAnything, an online retailer of specialized automotive products for up to $150 million, including an initial cash payment of $115 million, a $5 million holdback payment for working capital true-ups, and contingent payments not to exceed $30 million. With this acquisition, the Company expects to bolster its online presence in the high-end, automotive accessory and performance markets. The results of operations from AutoAnything have been included in the Company’s Other business activities since the date of acquisition. Pro forma results of operations related to the acquisition of AutoAnything are not presented as AutoAnything’s results are not material to the Company’s condensed consolidated statements of operations. The purchase price allocation resulted in goodwill of $83.3 million and intangible assets totaling $58.8 million. Goodwill generated from the acquisition is tax deductible and is primarily attributable to expected synergies and the assembled workforce. The contingent consideration is based on the achievement of certain performance metrics through calendar year 2014 with any earned payments due during the first calendar quarter of 2014 and 2015. The fair value of the contingent consideration as of the acquisition date was $22.7 million.

Note L – 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 26, 2012	$	302,645	$	—	$	302,645
Goodwill added through acquisition (1)		—		83,340		83,340
Goodwill adjustments		—		—		—
Net balance as of February 9, 2013	$	302,645	$	83,340	$	385,985

(1) See Note K for discussion of the acquisition completed during the twenty-four weeks ended February 9, 2013

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

	February 9, 2013
(in thousands)	Estimated Useful Life		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Technology		5 years	$	9,800	$	(285	)	$	9,515
Noncompete agreement		5 years		1,300		(38	)		1,262
Customer relationships		10 years		19,000		(277	)		18,723
Tradename		Indefinite		28,700		—			28,700
			$	58,800	$	(600	)	$	58,200

Amortization expense of intangible assets for the twelve and twenty-four weeks ended February 9, 2013, was $0.6 million.

11

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 February 9, 2013, is estimated as follows:

(in thousands)	Total
Remainder of 2013	$	2,298
2014		4,120
2015		4,120
2016		4,120
2017		4,120
Thereafter		10,722
	$	29,500

Note M – 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 (“Directive”), that the Company is liable for the downgradient impacts under a joint and severable liability theory, and the Company intends to contest these assertions due to the existence of other entities/sources of contamination, some of which are also named in the Directive, 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.

Note N – Segment Reporting

Three of the Company’s 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 25, 2012.

The Auto Parts Stores segment is a retailer and distributor of automotive parts and accessories through the Company’s 5,070 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, including 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.

12

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						Twenty-Four Weeks Ended
(in thousands)	February 9, 2013			February 11, 2012			February 9, 2013			February 11, 2012
Net Sales
Auto Parts Stores	$	1,796,280		$	1,762,903		$	3,745,003		$	3,647,041
Other		58,918			41,166			101,235			81,370
Total	$	1,855,198		$	1,804,069		$	3,846,238		$	3,728,411
Segment Profit
Auto Parts Stores	$	924,704		$	894,493		$	1,924,039		$	1,846,850
Other		37,277			31,722			69,808			62,992
Gross profit		961,981			926,215			1,993,847			1,909,842
Operating, selling, general and administrative expenses		(644,410	)		(625,564	)		(1,312,999	)		(1,268,257	)
Interest expense, net		(41,323	)		(38,923	)		(82,428	)		(78,017	)
Income before income taxes	$	276,248		$	261,728		$	598,420		$	563,568

13

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 February 9, 2013, the related condensed consolidated statements of income for the twelve and twenty-four week periods ended February 9, 2013 and February 11, 2012, the condensed consolidated statements of comprehensive income for the twelve and twenty-four week periods ended February 9, 2013 and February 11, 2012, and the condensed consolidated statements of cash flows for the twenty-four week periods ended February 9, 2013 and February 11, 2012. 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 25, 2012, 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 22, 2012, 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 25, 2012, 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

March 7, 2013

14

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 February 9, 2013, operated 4,735 stores in the United States, including Puerto Rico; 334 in Mexico; and one 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 February 9, 2013, in 3,146 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 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 twenty-four weeks ended February 9, 2013, are not necessarily indicative of the results that may be expected for the fiscal year ending August 31, 2013. 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 2012 had 16 weeks and for fiscal 2013 has 17 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 2.8% for the quarter, driven by new store growth and increased number of commercial programs, partially offset by the domestic same store sales decrease of 1.8%. Earnings per share increased 15.1% for the quarter.

Over the past several years, various factors have occurred within the economy that affect both our consumer and our industry, including the impact of the recession, continued high unemployment and other challenging economic conditions. Although we have seen a recent increase in new vehicle sales, we believe our consumers’ cash flows continue to decrease 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 believe other macroeconomic factors have adversely impacted both our consumer and our industry. During the second quarter of fiscal 2013, the price per gallon of unleaded gasoline in the United States began the quarter at $3.43 per gallon and ended the quarter at $3.61 per gallon, an $0.18 increase. During the comparable prior year period, gas prices increased by $0.15 per gallon during the second quarter, beginning at $3.37 per gallon and ending at $3.52 per gallon. With gas prices remaining at these overall higher 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.

Additional key macroeconomic factors facing our customers during the second quarter of fiscal 2013 were the delayed processing of income tax refunds and the reinstitution of payroll taxes back to historic levels. We believe a factor that impacted sales during the second quarter of fiscal 2013 was the delay in the processing of income tax refunds. Historically, our sales have increased in the last two weeks of our fiscal second quarter. Conversely, domestic same store sales decreased 8% in the last two weeks of the second quarter of fiscal 2013. We expect a similar amount of dollars in total will be refunded this year as compared to last year and that we will see more normalized sales volumes during the third quarter. The reduction in our customers’ take home pay as a result of the recent increase in payroll taxes was effective at the beginning of the 2013 calendar year and, at this point, we cannot predict the impact this change will have on our sales in future periods.

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.

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. From January 2012 through November 2012, miles driven have increased by 0.6% over last year. 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.

15

During the second quarter of fiscal 2013, failure and maintenance related categories represented the largest portion of our sales mix, at approximately 84% of total sales, with failure related categories continuing to be our strongest performers. While we have not experienced any fundamental shifts in our category sales mix as compared to previous years, we did experience a slight decline in mix of sales of the maintenance category. We believe the slowdown in maintenance related products continues to be largely due to weather related impacts in various regions of the U.S. Because of the unusually mild winter last year across parts of the U.S., we saw a reduced benefit from sales of maintenance related products compared to the prior fiscal year. We believe that we will see improvement in sales once we annualize the effects of the mild winter, however, we remain focused on refining and expanding our product assortment to ensure that we have the best merchandise at the right price in each of our categories.

Effective December 2012, we acquired certain assets and liabilities of AutoAnything, an online retailer of specialized automotive products for up to $150 million, including an initial cash payment of $115 million, a $5 million holdback payment for working capital true-ups, and contingent payments not to exceed $30 million. With this acquisition, we expect to bolster our online presence in the high-end, automotive accessory and performance markets. The results of operations from AutoAnything have been included in our Other business activities since the date of acquisition. The purchase price allocation resulted in goodwill of $83.3 million and intangible assets totaling $58.8 million. Goodwill generated from the acquisition is tax deductible and is primarily attributable to expected synergies and the assembled workforce. The contingent consideration is based on the achievement of certain performance metrics through calendar year 2014 with any earned payments due during the first calendar quarter of 2014 and 2015. The fair value of the contingent consideration as of the acquisition date was $22.7 million.

Twelve Weeks Ended February 9, 2013,

Compared with Twelve Weeks Ended February 11, 2012

Net sales for the twelve weeks ended February 9, 2013, increased $51.1 million to $1.855 billion, or 2.8%, over net sales of $1.804 billion for the comparable prior year period. Total auto parts sales increased by 1.9%, primarily driven by net sales of $49.1 million from new stores and increased number of commercial programs, partially offset by domestic same store sales decrease of 1.8%.

Gross profit for the twelve weeks ended February 9, 2013, was $962.0 million, or 51.9% of net sales, compared with $926.2 million, or 51.3% of net sales, during the comparable prior year period. The improvement in gross margin was primarily driven by lower acquisition costs.

Operating, selling, general and administrative expenses for the twelve weeks ended February 9, 2013, were $644.4 million, or 34.7% of net sales, compared with $625.6 million, or 34.7% of net sales, during the comparable prior year period. Operating expenses, as a percentage of sales, increased slightly due to the lower sales growth rates, partially offset by lower incentive compensation (47 basis points).

Net interest expense for the twelve weeks ended February 9, 2013, was $41.3 million compared with $38.9 million during the comparable prior year period. The increase was primarily due to an increase in debt, partially offset by a decrease in borrowing rates over the comparable prior year period. Average borrowings for the twelve weeks ended February 9, 2013, were $3.948 billion, compared with $3.428 billion for the comparable prior year period. Weighted average borrowing rates were 4.3% for the twelve weeks ended February 9, 2013, and 4.7% for the twelve weeks ended February 11, 2012.

Our effective income tax rate was 36.2% of pretax income for the twelve weeks ended February 9, 2013 and for the comparable prior year period.

Net income for the twelve week period ended February 9, 2013, increased by $9.3 million to $176.2 million, and diluted earnings per share increased by 15.1% to $4.78 from $4.15 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 $0.39.

Twenty-Four Weeks Ended February 9, 2013,

Compared with Twenty-Four Weeks Ended February 11, 2012

Net sales for the twenty-four weeks ended February 9, 2013, increased $117.8 million to $3.846 billion, or 3.2%, over net sales of $3.728 billion for the comparable prior year period. Total auto parts sales increased by 2.7%, primarily driven by net sales of $98.9 million from new stores, increased number of commercial programs, partially offset by a domestic same store sales (sales for stores open at least one year) decrease of 0.7%.

Gross profit for the twenty-four weeks ended February 9, 2013, was $1.994 billion, or 51.8% of net sales, compared with $1.910 billion, or 51.2% of net sales, during the comparable prior year period. The improvement in gross margin was due to favorable merchandise margins (50 basis points) primarily driven by lower acquisition costs and lower shrink expense (11 basis points).

Operating, selling, general and administrative expenses for the twenty-four weeks ended February 9, 2013, were $1.313 billion, or 34.1% of net sales, compared with $1.268 billion, or 34.0% of net sales, during the comparable prior year period. Operating expenses, as a percentage of sales, increased due to the lower sales growth rates, partially offset by lower incentive compensation (31 basis points).

Net interest expense for the twenty-four weeks ended February 9, 2013, was $82.4 million compared with $78.0 million during the comparable prior year period. The increase was primarily due to an increase in debt, partially offset by a decrease in borrowing rates over the comparable prior year period. Average borrowings for the twenty-four weeks ended February 9, 2013, were $3.845 billion, compared with $3.357 billion for the comparable prior year period. Weighted average borrowing rates were 4.4% for the twenty-four weeks ended February 9, 2013, and 4.8% for the twenty-four weeks ended February 11, 2012.

16

Our effective income tax rate was 36.5% of pretax income for the twenty-four weeks ended February 9, 2013 and for the comparable prior year period.

Net income for the twenty-four week period ended February 9, 2013, increased by $21.6 million to $379.7 million, and diluted earnings per share increased by 15.5% to $10.19 from $8.83 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 $0.75.

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 twenty-four weeks ended February 9, 2013, our net cash flows from operating activities provided $510.8 million as compared with $461.2 million provided during the comparable prior year period. The increase is primarily due to the timing of tax payments, increased net income, and the change in inventories, net of payables.

Our net cash flows from investing activities for the twenty-four weeks ended February 9, 2013, used $289.8 million as compared with $129.2 million used in the comparable prior year period. Capital expenditures for the twenty-four weeks ended February 9, 2013, were $169.6 million compared to $132.4 million for the comparable prior year period. The increase is primarily driven by an increase in the number of purchased stores as compared to leased stores, the timing of new store openings, and spend for future store openings. During the twenty-four week period ended February 9, 2013, we opened 64 net new stores. In the comparable prior year period, we opened 54 net new stores. Cash flows used in the acquisition of AutoAnything were $115 million during the twenty-four week period ended February 9, 2013. Investing cash flows were also impacted by our wholly owned insurance captive, which purchased $22.3 million and sold $16.2 million in marketable securities during the twenty-four weeks ended February 9, 2013. During the comparable prior year period, the captive purchased $19.0 million in marketable securities and sold $16.4 million in marketable securities. Capital asset disposals and other provided $0.9 million during the twenty-four week period ended February 9, 2013, and $5.8 million in the comparable prior year period.

Our net cash flows from financing activities for the twenty-four weeks ended February 9, 2013, used $209.1 million compared to $326.3 million used in the comparable prior year period. During the twenty-four weeks ended February 9, 2013, we received $300.0 million in proceeds from the issuance of debt; there were no proceeds from the issuance of debt during the comparable prior year period. The proceeds in the first quarter of fiscal 2013 were used for the repayment of a portion of commercial paper borrowings and general corporate purposes. During the twenty-four weeks ended February 9, 2013, we repaid our $300 million Senior Note due in October 2012 using commercial paper borrowings. There were no repayments of debt in the comparable prior year period. For the twenty-four weeks ended February 9, 2013, net proceeds from commercial paper and short-term borrowings were $229.5 million, as compared to proceeds from net borrowings of $113.7 million in the comparable prior year period. Stock repurchases were $502.3 million in the current twenty-four week period as compared with $482.3 million in the comparable prior year period. For the twenty-four weeks ended February 9, 2013, proceeds from the sale of common stock and exercises of stock options provided $87.1 million, including $33.7 million in related tax benefits. In the comparable prior year period, proceeds from the sale of common stock and exercises of stock options provided $54.8 million, including $21.8 million in related tax benefits.

During fiscal 2013, we expect to invest in our business at an increased rate as compared to fiscal 2012. Our investment is expected to be directed primarily to our new-store development program, enhancements to existing stores and infrastructure, and our acquisition of AutoAnything. 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. During fiscal 2012 and fiscal 2011, our capital expenditures increased by approximately 18% and 2%, respectively, as compared to the prior year, and we expect our capital expenditures for fiscal 2013 to increase by 10% to 15% as compared to fiscal 2012. 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 31, 2013.

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 110.0% compared to 109.6% 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 February 9, 2013, our after-tax return on invested capital (“ROIC”) was 32.4% as compared to 32.2% 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.

17

Debt Facilities

In September 2011, we amended and restated our revolving credit facility, increasing the capacity under the revolving credit facility to $1.0 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 $1.250 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 2016.

As the available balance is reduced by commercial paper borrowings and certain outstanding letters of credit, we had $215.5 million in available capacity under our $1.0 billion credit facility at February 9, 2013. As of February 9, 2013, we have $3.7 million in letters of credit outstanding under the revolving credit facility.

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 February 9, 2013, we have $99.8 million in letters of credit outstanding under the letter of credit facility, which expires in June 2013.

In addition to the outstanding letters of credit issued under the committed facilities discussed above, we had $41.7 million in letters of credit outstanding as of February 9, 2013. These letters of credit have various maturity dates and were issued on an uncommitted basis.

On November 13, 2012, we issued $300 million in 2.875% Senior Notes due January 2023 under our shelf registration statement filed with the Securities and Exchange Commission 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 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 6.500% and 7.125% Senior Notes issued during August 2008, and the 5.750% Senior Notes issued in July 2009, are subject to an interest rate adjustment if the debt ratings assigned to the notes are downgraded. These notes, along with the 2.875% Senior Notes issued in November 2012, the 3.700% Senior Notes issued in April 2012 and the 4.000% Senior Notes issued in November 2010, also contain a provision that repayment of the notes may be accelerated if AutoZone experiences 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 February 9, 2013, 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 2.6:1 as of February 9, 2013, and was 2.4:1 as of February 11, 2012. 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 February 9, 2013, we have repurchased a total of 132.5 million shares at an aggregate cost of $12.0 billion, including 1,367,832 shares of our common stock at an aggregate cost of $502.3 million during the twenty-four week period ended February 9, 2013. On September 28, 2012, the Board voted to increase the authorization by $750 million to raise the cumulative share repurchase authorization from $11.90 billion to $12.65 billion. Considering cumulative repurchases as of February 9, 2013, we have $603.4 million remaining under the Board’s authorization to repurchase our common stock. We did not repurchase shares of our common stock subsequent to February 9, 2013.

18

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 February 9, 2013, was $145.5 million compared with $102.3 million at August 25, 2012, and our total surety bonds commitment at February 9, 2013, was $32.6 million compared with $33.1 million at August 25, 2012.

Financial Commitments

As of February 9, 2013, there were no significant changes to our contractual obligations as described in our Annual Report on Form 10-K for the year ended August 25, 2012.

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 uses select measurements 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.

19

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 February 9, 2013 and February 11, 2012.

	A			B			A-B=C			D			C+D
(in thousands, except percentage)	Fiscal Year Ended August 25, 2012			Twenty-Four Weeks  Ended February 11, 2012			Twenty-Eight Weeks Ended August 25, 2012			Twenty-Four Weeks  Ended February 9, 2013			Trailing Four Quarters Ended February 9, 2013
Net income	$	930,373		$	358,055		$	572,318		$	379,698		$	952,016
Adjustments:
Interest expense		175,905			78,017			97,888			82,428			180,316
Rent expense		229,417			103,721			125,696			109,915			235,611
Tax effect (1)		(145,916	)		(65,426	)		(80,490	)		(69,243	)		(149,733	)
After-tax return	$	1,189,779		$	474,367		$	715,412		$	502,798		$	1,218,210
Average debt (2)													$	3,727,872
Average deficit (3)														(1,480,371	)
Rent x 6 (4)														1,413,666
Average capital lease obligations (5)														101,446
Pre-tax invested capital													$	3,762,613
ROIC														32.4	%
	A			B			A-B=C			D			C+D
(in thousands, except percentage)	Fiscal Year Ended August 27, 2011			Twenty-Four Weeks  Ended February 12, 2011			Twenty-Eight Weeks Ended August 27, 2011			Twenty-Four Weeks  Ended February 11, 2012			Trailing Four Quarters Ended February 11, 2012
Net income	$	848,974		$	320,131		$	528,843		$	358,055		$	886,898
Adjustments:
Interest expense		170,557			76,829			93,728			78,017			171,745
Rent expense		213,846			96,692			117,154			103,721			220,875
Tax effect (1)		(138,562	)		(62,548	)		(76,014	)		(65,509	)		(141,523	)
After-tax return	$	1,094,815		$	431,104		$	663,711		$	474,284		$	1,137,995
Average debt (2)													$	3,328,075
Average deficit (3)														(1,210,962	)
Rent x 6 (4)														1,325,250
Average capital lease obligations (5)														88,413
Pre-tax invested capital													$	3,530,776
ROIC														32.2	%

(1) The effective tax rate was 36.0% over the trailing four quarters ended February 9, 2013 and February 11, 2012.

(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.

20

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

The following tables calculate the ratio of adjusted debt to EBITDAR for the trailing four quarters ended February 9, 2013 and

February 11, 2012.

	A		B		A-B=C		D		C+D
(in thousands, except ratio)	Fiscal Year Ended August 25, 2012		Twenty-Four Weeks  Ended February 11, 2012		Twenty-Eight Weeks Ended August 25, 2012		Twenty-Four Weeks  Ended February 9, 2013		Trailing  Four Quarters Ended February 9, 2013
Net income	$	930,373	$	358,055	$	572,318	$	379,698	$	952,016
Add: Interest expense		175,905		78,017		97,888		82,428		180,316
Income tax expense		522,613		205,513		317,100		218,722		535,822
EBIT		1,628,891		641,585		987,306		680,848		1,668,154
Add: Depreciation expense		211,831		96,170		115,661		103,044		218,705
Rent expense		229,417		103,721		125,696		109,915		235,611
Share-based expense		33,363		15,045		18,318		16,616		34,934
EBITDAR	$	2,103,502	$	856,521	$	1,246,981	$	910,423	$	2,157,404
Debt									$	3,997,806
Capital lease obligations										99,369
Add: Rent x 6 (1)										1,413,666
Adjusted debt									$	5,510,841
Adjusted debt / EBITDAR										2.6

	A		B		A-B=C		D		C+D
(in thousands, except ratio)	Fiscal Year Ended August 27, 2011		Twenty-Four Weeks  Ended February 12, 2011		Twenty-Eight Weeks Ended August 27, 2011		Twenty-Four Weeks  Ended February 11, 2012		Trailing  Four Quarters Ended February 11, 2012
Net income	$	848,974	$	320,131	$	528,843	$	358,055	$	886,898
Add: Interest expense		170,557		76,829		93,728		78,017		171,745
Income tax expense		475,272		180,908		294,364		205,513		499,877
EBIT		1,494,803		577,868		916,935		641,585		1,558,520
Add: Depreciation expense		196,209		88,417		107,792		96,170		203,962
Rent expense		213,846		96,692		117,154		103,721		220,875
Share-based expense		26,625		12,119		14,506		15,045		29,551
EBITDAR	$	1,931,483	$	775,096	$	1,156,387	$	856,521	$	2,012,908
Debt									$	3,464,360
Capital lease obligations										103,774
Add: Rent x 6 (1)										1,325,250
Adjusted debt									$	4,893,384
Adjusted debt / EBITDAR										2.4

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

Recent Accounting Pronouncements

In February 2013, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) No. 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 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. We do not expect the provision of ASU 2013-02 to have a material impact on our consolidated financial statements. This update will be effective for us at the beginning of our fiscal 2014 year.

21

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 25, 2012. Our critical accounting policies have not changed since the filing of our Annual Report on Form 10-K for the year ended August 25, 2012.

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 25, 2012, 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 February 9, 2013, 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 25, 2012, except as described below.

The fair value of our debt was estimated at $4.242 billion as of February 9, 2013, and $4.055 billion as of August 25, 2012, 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 $244.4 million at February 9, 2013 and $286.6 million at August 25, 2012. We had $747.8 million of variable rate debt outstanding at February 9, 2013, and $518.2 million of variable rate debt outstanding at August 25, 2012. 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 $7.5 million in fiscal 2013. The primary interest rate exposure on variable rate debt is based on LIBOR. We had outstanding fixed rate debt of $3.250 billion at February 9, 2013, and $3.250 billion at August 25, 2012. A one percentage point increase in interest rates would reduce the fair value of our fixed rate debt by $141.0 million at February 9, 2013.

Item 4. Controls and Procedures.

As of February 9, 2013, 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 February 9, 2013. During or subsequent to the quarter ended February 9, 2013, there were no changes in our internal controls that have materially affected or are reasonably likely to materially affect, internal controls over financial reporting.

Item 4T. Controls and Procedures.

Not applicable.

22

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 (“Directive”), that we are liable for the downgradient impacts under a joint and severable liability theory, and we intend to contest these assertions due to the existence of other entities/sources of contamination, some of which are also named in the Directive, 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 25, 2012.

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

Shares of common stock repurchased by the Company during the quarter ended February 9, 2013, 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
November 18, 2012 to December 15, 2012		153,489	$	375.72		153,489	$	730,757,484
December 16, 2012 to January 12, 2013		309,749		354.67		309,749		620,898,018
January 13, 2013 to February 9, 2013		49,926		350.30		49,926		603,408,864
Total		513,164	$	360.54		513,164	$	603,408,864

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. The program was most recently amended on September 28, 2012, to increase the repurchase authorization to $12.65 billion from $11.90 billion and does not have an expiration date. All of the above repurchases were part of this program. We did not repurchase shares of our common stock subsequent to February 9, 2013.

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.
4.1	Officers’ Certificate dated November 13, 2012, pursuant to section 3.2 of the indenture dated August 8, 2003, setting forth the terms of the 2.875% Senior Notes due 2023. Incorporated by reference to Exhibit 4.1 to the Current Report on Form 8-K dated November 13, 2012.
4.2	Form of 2.875% Senior Notes due 2023. Incorporated by reference from the Form 8-K dated November 13, 2012.
*10.1	Third Amendment to the AutoZone, Inc. Executive Deferred Compensation Plan incorporated by reference to Exhibit 10.1 to the Form 8-K dated December 12, 2012.
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

* Management contract or compensatory plan or arrangement.

** In accordance with Regulation S-T, the Interactive Data Files in Exhibit 101 to the Quarterly Report on Form 10-Q shall be deemed “furnished” and not “filed.”

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: March 7, 2013

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.
4.1	Officers’ Certificate dated November 13, 2012, pursuant to section 3.2 of the indenture dated August 8, 2003, setting forth the terms of the 2.875% Senior Notes due 2023. Incorporated by reference to Exhibit 4.1 to the Current Report on Form 8-K dated November 13, 2012.
4.2	Form of 2.875% Senior Notes due 2023. Incorporated by reference from the Form 8-K dated November 13, 2012.
*10.1	Third Amendment to the AutoZone, Inc. Executive Deferred Compensation Plan incorporated by reference to Exhibit 10.1 to the Form 8-K dated December 12, 2012.
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

* Management contract or compensatory plan or arrangement.

** In accordance with Regulation S-T, the Interactive Data Files in Exhibit 101 to the Quarterly Report on Form 10-Q shall be deemed “furnished” and not “filed.”

26

EX-12.1

Exhibit 12.1

Computation of Ratio of Earnings to Fixed Charges

(Unaudited)

(in thousands, except ratios)

	Twenty-Four Weeks Ended
	February 9, 2013			February 11, 2012
Earnings:
Income before income taxes	$	598,420		$	563,568
Fixed charges		117,947			111,419
Less: Capitalized interest		(524	)		(409	)
Adjusted earnings	$	715,843		$	674,578
Fixed charges:
Gross interest expense	$	79,781		$	75,516
Amortization of debt expense		3,905			3,573
Interest portion of rent expense		34,261			32,330
Fixed charges	$	117,947		$	111,419
Ratio of earnings to fixed charges		6.1			6.1

	Fiscal Year Ended August
	2012 (52 weeks)			2011 (52 weeks)			2010 (52 weeks)			2009 (52 weeks)			2008 (53 weeks)
Earnings:
Income before income taxes	$	1,452,986		$	1,324,246		$	1,160,505		$	1,033,746		$	1,007,389
Fixed charges		250,056			240,329			223,608			204,017			173,311
Less: Capitalized interest		(1,245	)		(1,059	)		(1,093	)		(1,301	)		(1,313	)
Adjusted earnings	$	1,701,797		$	1,563,516		$	1,383,020		$	1,236,462		$	1,179,387
Fixed charges:
Gross interest expense	$	170,481		$	164,712		$	156,135		$	143,860		$	120,006
Amortization of debt expense		8,066			8,962			6,495			3,644			1,837
Interest portion of rent expense		71,509			66,655			60,978			56,513			51,468
Fixed charges	$	250,056		$	240,329		$	223,608		$	204,017		$	173,311
Ratio of earnings to fixed charges		6.8			6.5			6.2			6.1			6.8

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 March 7, 2013, 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 February 9, 2013:

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-3 No. 333-100205) pertaining to a registration to sell $500 million of debt securities

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-3 No. 333-107828) pertaining to a registration to sell $500 million of debt securities

Registration Statement (Form S-3 No. 333-118308) pertaining to the registration to sell $200 million of debt securities

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

Registration Statement (Form S-3 No. 333-152592) pertaining to a shelf registration to sell debt securities

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

March 7, 2013

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.

March 7, 2013

/s/ WILLIAM C. RHODES, III

William C. Rhodes, III

Chairman, President and Chief Executive Officer

(Principal Executive Officer)

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.

March 7, 2013

/s/ WILLIAM T. GILES

William T. Giles

Chief Financial Officer and Executive Vice President

Finance, Information Technology and ALLDATA

(Principal Financial Officer)

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 February 9, 2013, 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.

March 7, 2013

/s/ WILLIAM C. RHODES, III

William C. Rhodes, III

Chairman, President and Chief Executive Officer

(Principal Executive Officer)

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 February 9, 2013, 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.

March 7, 2013

/s/ WILLIAM T. GILES

William T. Giles

Chief Financial Officer and Executive Vice President

Finance, Information Technology and ALLDATA

(Principal Financial Officer)

XML

Derivative Financial Instruments - Additional Information (Detail) (USD $)	6 Months Ended		3 Months Ended
	Feb. 09, 2013	Feb. 11, 2012	Nov. 17, 2012 Treasury rate locks [Member]	Aug. 25, 2012 Treasury rate locks [Member] Derivative	May 05, 2012 Treasury rate locks [Member] Derivative	Aug. 25, 2012 Treasury rate locks [Member] Loss on two expired treasury rate locks [Member]	May 05, 2012 Treasury rate locks [Member] Loss on two expired treasury rate locks [Member]	Aug. 25, 2012 Treasury Rate Lock, One [Member]	May 05, 2012 Treasury Rate Lock, One [Member]	Aug. 25, 2012 Treasury Rate Lock, Two [Member]	May 05, 2012 Treasury Rate Lock, Two [Member]
Derivative [Line Items]
Number of treasury rate locks				2	2
Notional amount of cash flow hedges								$ 100,000,000	$ 300,000,000	$ 100,000,000	$ 100,000,000
Senior notes issued during period	300,000,000		300,000,000		500,000,000
Expiration date of cash flow hedge agreement				November 1, 2012	April 20, 2012
Fixed rates of the hedges based on LIBOR								2.07%	2.09%	1.92%	2.07%
Derivative instrument, variable interest rate years				10 years	10 years
Losses recognized in OCI upon expiration of swaps						5,100,000	2,800,000
Ineffective portion recognized of forward starting swaps				0	0
Derivative description of terms				The locks were benchmarked based on the 10-year U.S. treasury notes	The locks were benchmarked based on the 10-year U.S. treasury notes
Derivative losses recorded in Accumulated other comprehensive loss	12,200,000
Net derivative losses amortized into Interest expense	831,000	813,000
Net derivative loss expected to be reclassified over next 12 months	$ 545,000

XML

Segment Reporting - Segment Results (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Feb. 09, 2013	Feb. 11, 2012	Feb. 09, 2013	Feb. 11, 2012
Operating Statistics [Line Items]
Net sales	$ 1,855,198	$ 1,804,069	$ 3,846,238	$ 3,728,411
Gross profit	961,981	926,215	1,993,847	1,909,842
Operating, selling, general and administrative expenses	(644,410)	(625,564)	(1,312,999)	(1,268,257)
Interest expense, net	(41,323)	(38,923)	(82,428)	(78,017)
Income before income taxes	276,248	261,728	598,420	563,568
Auto Parts Stores [Member]
Operating Statistics [Line Items]
Net sales	1,796,280	1,762,903	3,745,003	3,647,041
Gross profit	924,704	894,493	1,924,039	1,846,850
Other [Member]
Operating Statistics [Line Items]
Net sales	58,918	41,166	101,235	81,370
Gross profit	$ 37,277	$ 31,722	$ 69,808	$ 62,992

XML

Goodwill and Intangibles - Schedule of Changes in Carrying Amount of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Feb. 09, 2013	Aug. 25, 2012
Goodwill [Line Items]
Net balance as of August 26, 2012	$ 302,645	$ 302,645
Goodwill added through acquisition	83,340
Goodwill adjustments
Net balance as of February 9, 2013	385,985	302,645
Auto Parts Stores [Member]
Goodwill [Line Items]
Net balance as of August 26, 2012	302,645
Goodwill adjustments
Net balance as of February 9, 2013	302,645
Other [Member]
Goodwill [Line Items]
Goodwill added through acquisition	83,340
Goodwill adjustments
Net balance as of February 9, 2013	$ 83,340

XML

Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Feb. 09, 2013		Feb. 11, 2012		Feb. 09, 2013		Feb. 11, 2012
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Pension Liability, Beginning balance					$ (93,967)
Other comprehensive loss (income)	2,038	[1]	3,378	[1]	3,473	[1]	13,797	[1]
Pension Liability, Ending balance	(90,494)				(90,494)
Foreign Currency, Beginning balance					(50,267)
Other comprehensive loss (income)					13,261
Foreign Currency, Ending balance	(37,006)				(37,006)
Net Unrealized Gain on Securities, Beginning balance					351
Other comprehensive loss (income)					(57)
Net Unrealized Gain on Securities, Ending balance	294				294
Derivatives, Beginning balance					(8,130)
Other comprehensive loss (income)	263	[2]	255	[2]	428	[2]	3,132	[2]
Derivatives, Ending balance	(7,702)				(7,702)
Accumulated Other Comprehensive Loss, Beginning balance					(152,013)
Other comprehensive loss (income)					17,105
Accumulated Other Comprehensive Loss, Ending balance	$ (134,908)				$ (134,908)

[1] Pension liability adjustments are presented net of taxes of $1,295 in fiscal 2013 and $1,117 in fiscal 2012 for the twelve weeks ended and $3,193 in fiscal 2013 and $9,276 in fiscal 2012 for the twenty-four weeks ended

[2] Net derivative activities are presented net of taxes of $155 in fiscal 2013 and $150 in fiscal 2012 for the twelve weeks ended and $258 in fiscal 2013 and $2,320 in fiscal 2012 for the twenty-four weeks ended

XML

Share-Based Payments - Weighted Average for Key Assumptions Used in Determining Fair Value of Options Granted Related Share-Based Compensation Expense (Detail)	6 Months Ended
	Feb. 09, 2013	Feb. 11, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected price volatility	29.00%	31.00%
Risk-free interest rate	0.50%	0.70%
Weighted average expected lives (in years)	5 years 2 months 12 days	5 years 3 months 18 days
Forfeiture rate	10.00%	10.00%
Dividend yield	0.00%	0.00%

XML

Marketable Securities (Tables)

6 Months Ended

Feb. 09, 2013

Available-for-Sale Marketable Securities

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

	February 9, 2013
(in thousands)	Amortized Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate securities	$	29,624	$	290	$	(3	)	$	29,911
Government bonds		21,575		58		(1	)		21,632
Mortgage-backed securities		8,453		23		(33	)		8,443
Asset-backed securities and other		22,097		120		—			22,217
	$	81,749	$	491	$	(37	)	$	82,203

	August 25, 2012
(in thousands)	Amortized Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate securities	$	26,215	$	307	$	—		$	26,522
Government bonds		20,790		117		(1	)		20,906
Mortgage-backed securities		4,369		17		(19	)		4,367
Asset-backed securities and other		24,299		120		—			24,419
	$	75,673	$	561	$	(20	)	$	76,214

XML

Goodwill and Intangibles - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Feb. 09, 2013	Feb. 09, 2013
Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	$ 0.6	$ 0.6

XML

Pension and Savings Plans - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Feb. 09, 2013
Annual contributions by the Company to pension plans	$ 4.1
Expected contributions to the plan in fiscal 2013	$ 13.7

XML

Marketable Securities - Available-for-Sale Marketable Securities (Detail) (USD $) In Thousands, unless otherwise specified	Feb. 09, 2013	Aug. 25, 2012
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	$ 81,749	$ 75,673
Available-For-Sale Marketable Securities, Gross Unrealized Gains	491	561
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(37)	(20)
Available-For-Sale Marketable Securities, Fair Value	82,203	76,214
Corporate securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	29,624	26,215
Available-For-Sale Marketable Securities, Gross Unrealized Gains	290	307
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(3)
Available-For-Sale Marketable Securities, Fair Value	29,911	26,522
Government bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	21,575	20,790
Available-For-Sale Marketable Securities, Gross Unrealized Gains	58	117
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(1)	(1)
Available-For-Sale Marketable Securities, Fair Value	21,632	20,906
Mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	8,453	4,369
Available-For-Sale Marketable Securities, Gross Unrealized Gains	23	17
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(33)	(19)
Available-For-Sale Marketable Securities, Fair Value	8,443	4,367
Asset-backed securities and other [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	22,097	24,299
Available-For-Sale Marketable Securities, Gross Unrealized Gains	120	120
Available-For-Sale Marketable Securities, Fair Value	$ 22,217	$ 24,419

XML

Litigation - Additional Information (Detail)	6 Months Ended
	Feb. 09, 2013
Loss Contingencies [Line Items]
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 visible contamination on the property and is investigating and will be addressing potential vapor intrusion impacts in downgradient residences and businesses. Pursuant to the Voluntary Remediation Agreement, upon completion of all remediation required by the agreement, the Company is eligible to be reimbursed up to 75 percent of its remediation costs by the State of New Jersey. Although the aggregate amount of additional costs that the Company may incur pursuant to the Voluntary Remediation Agreement cannot currently be ascertained, the Company does not currently believe that fulfillment of its obligations under the agreement will result in costs that are material to its financial condition, results of operations or cash flow.
Reimbursable remediation costs	75.00%

XML

Acquisition - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Dec. 19, 2012
Business Acquisition [Line Items]
Acquisition of assets and liabilities	$ 150
Initial cash payment	115
Holdback payment for working capital true-ups	5
Contingent payments, total	30
Purchase price allocation, goodwill	83.3
Purchase price allocation, intangible assets	58.8
Estimated fair value of the performance-based contingent consideration	$ 22.7

XML

Share-Based Payments

6 Months Ended

Feb. 09, 2013

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 $8.5 million for the twelve week period ended February 9, 2013, and was $7.5 million for the comparable prior year period. Share-based compensation expense was $16.6 million for the twenty-four week period ended February 9, 2013, and was $15.0 million for the comparable prior year period.

During the twenty-four week period ended February 9, 2013, 413,485 shares of stock options were exercised at a weighted average exercise price of $129.00. In the comparable prior year period, 294,387 shares of stock options were exercised at a weighted average exercise price of $113.18.

The Company made stock option grants of 355,560 shares during the twenty-four week period ended February 9, 2013, and granted options to purchase 377,130 shares during the comparable prior year period. The weighted average fair value of the stock option awards granted during the twenty-four week periods ended February 9, 2013, and February 11, 2012, using the Black-Scholes-Merton multiple-option pricing valuation model, was $98.09 and $93.42 per share, respectively, using the following weighted average key assumptions:

	Twenty-Four Weeks Ended
	February 9, 2013			February 11, 2012
Expected price volatility		29	%		31	%
Risk-free interest rate		0.5	%		0.7	%
Weighted average expected lives (in years)		5.2			5.3
Forfeiture rate		10	%		10	%
Dividend yield		0	%		0	%

See AutoZone’s Annual Report on Form 10-K for the year ended August 25, 2012, 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 February 9, 2013, 375,980 stock options were excluded from the diluted earnings per share computation because they would have been anti-dilutive. For the comparable prior year period, 1,500 anti-dilutive shares were excluded from the dilutive earnings per share computation. There were 375,980 anti-dilutive shares excluded from the diluted earnings per share computation for the twenty-four week period ended February 9, 2013, and 1,500 anti-dilutive shares excluded for the comparable prior year period.

XML

Financing - Schedule of Total Debt (Detail) (USD $) In Thousands, unless otherwise specified	Feb. 09, 2013	Aug. 25, 2012
Debt Instrument [Line Items]
Commercial paper debt	$ 747,806	$ 513,402
Total debt	3,997,806	3,768,183
Less: Short-term borrowings	(484,533)	(49,881)
Long-term debt	3,513,273	3,718,302
5.875% Senior Notes due October 2012, effective interest rate of 6.33% [Member]
Debt Instrument [Line Items]
Long-term debt		300,000
Stated interest rate percentage	5.875%	5.875%
Effective interest rate	6.33%	6.33%
Debt instrument, due date	October 2012	October 2012
4.375% Senior Notes due June 2013, effective interest rate of 5.65% [Member]
Debt Instrument [Line Items]
Long-term debt	200,000	200,000
Stated interest rate percentage	4.375%	4.375%
Effective interest rate	5.65%	5.65%
Debt instrument, due date	June 2013	June 2013
6.500% Senior Notes due January 2014, effective interest rate of 6.63% [Member]
Debt Instrument [Line Items]
Long-term debt	500,000	500,000
Stated interest rate percentage	6.50%	6.50%
Effective interest rate	6.63%	6.63%
Debt instrument, due date	January 2014	January 2014
5.750% Senior Notes due January 2015, effective interest rate of 5.89% [Member]
Debt Instrument [Line Items]
Long-term debt	500,000	500,000
Stated interest rate percentage	5.75%	5.75%
Effective interest rate	5.89%	5.89%
Debt instrument, due date	January 2015	January 2015
5.500% Senior Notes due November 2015, effective interest rate of 4.86% [Member]
Debt Instrument [Line Items]
Long-term debt	300,000	300,000
Stated interest rate percentage	5.50%	5.50%
Effective interest rate	4.86%	4.86%
Debt instrument, due date	November 2015	November 2015
6.950% Senior Notes due June 2016, effective interest rate of 7.09% [Member]
Debt Instrument [Line Items]
Long-term debt	200,000	200,000
Stated interest rate percentage	6.95%	6.95%
Effective interest rate	7.09%	7.09%
Debt instrument, due date	June 2016	June 2016
7.125% Senior Notes due August 2018, effective interest rate of 7.28% [Member]
Debt Instrument [Line Items]
Long-term debt	250,000	250,000
Stated interest rate percentage	7.125%	7.125%
Effective interest rate	7.28%	7.28%
Debt instrument, due date	August 2018	August 2018
4.000% Senior Notes due November 2020, effective interest rate of 4.43% [Member]
Debt Instrument [Line Items]
Long-term debt	500,000	500,000
Stated interest rate percentage	4.00%	4.00%
Effective interest rate	4.43%	4.43%
Debt instrument, due date	November 2020	November 2020
3.700% Senior Notes due April 2022, effective interest rate of 3.85% [Member]
Debt Instrument [Line Items]
Long-term debt	500,000	500,000
Stated interest rate percentage	3.70%	3.70%
Effective interest rate	3.85%	3.85%
Debt instrument, due date	April 2022	April 2022
2.875% Senior Notes due January 2023, effective interest rate of 3.21%[Member]
Debt Instrument [Line Items]
Long-term debt	300,000
Stated interest rate percentage	2.875%	2.875%
Effective interest rate	3.21%	3.21%
Debt instrument, due date	January 2023	January 2023
Commercial paper, weighted average interest rate of 0.38% and 0.42% at February 9, 2013 and August 25, 2012 [Member]
Debt Instrument [Line Items]
Weighted average interest rate of commercial paper	0.38%	0.42%
Unsecured, peso denominated borrowings, weighted average interest rate of 4.57% at August 25, 2012 [Member]
Debt Instrument [Line Items]
Short-term debt		$ 4,781
Weighted average interest rate of unsecured, peso denominated borrowings	4.57%

XML

Goodwill and Intangibles (Tables)

6 Months Ended

Feb. 09, 2013

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 26, 2012	$	302,645	$	—	$	302,645
Goodwill added through acquisition (1)		—		83,340		83,340
Goodwill adjustments		—		—		—
Net balance as of February 9, 2013	$	302,645	$	83,340	$	385,985

(1) See Note K for discussion of the acquisition completed during the twenty-four weeks ended February 9, 2013

Schedule of Carrying Amounts of Intangible Assets

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

	February 9, 2013
(in thousands)	Estimated Useful Life		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Technology		5 years	$	9,800	$	(285	)	$	9,515
Noncompete agreement		5 years		1,300		(38	)		1,262
Customer relationships		10 years		19,000		(277	)		18,723
Tradename		Indefinite		28,700		—			28,700
			$	58,800	$	(600	)	$	58,200

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 February 9, 2013, is estimated as follows:

(in thousands)	Total
Remainder of 2013	$	2,298
2014		4,120
2015		4,120
2016		4,120
2017		4,120
Thereafter		10,722
	$	29,500

XML

Accumulated Other Comprehensive Loss (Tables)

6 Months Ended

Feb. 09, 2013

Changes in Accumulated Other Comprehensive Loss

Changes in Accumulated other comprehensive loss consisted of the following:

(in thousands)	Pension Liability			Foreign Currency  (1)			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)		3,473			13,261			(57	)		428			17,105
Balance at February 9, 2013	$	(90,494	)	$	(37,006	)	$	294		$	(7,702	)	$	(134,908	)

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

XML

Financing - Additional Information (Detail) (USD $)	6 Months Ended			1 Months Ended								6 Months Ended
	Feb. 09, 2013	Aug. 25, 2012	Sep. 13, 2011	Nov. 13, 2012 2.875% Senior Notes due January 2023, effective interest rate of 3.21%[Member]	Feb. 09, 2013 2.875% Senior Notes due January 2023, effective interest rate of 3.21%[Member]	Aug. 25, 2012 2.875% Senior Notes due January 2023, effective interest rate of 3.21%[Member]	Feb. 09, 2013 4.375% Senior Notes due June 2013, effective interest rate of 5.65% [Member]	Aug. 25, 2012 4.375% Senior Notes due June 2013, effective interest rate of 5.65% [Member]	Feb. 09, 2013 6.500% Senior Notes due January 2014, effective interest rate of 6.63% [Member]	Aug. 25, 2012 6.500% Senior Notes due January 2014, effective interest rate of 6.63% [Member]	Feb. 09, 2013 Letters of credit [Member]	Feb. 09, 2013 Capital leases [Member]	Feb. 09, 2013 Commercial paper, weighted average interest rate of 0.38% and 0.42% at February 9, 2013 and August 25, 2012 [Member] M	Aug. 25, 2012 Commercial paper, weighted average interest rate of 0.38% and 0.42% at February 9, 2013 and August 25, 2012 [Member]	Aug. 25, 2012 Unsecured, peso denominated borrowings, weighted average interest rate of 4.57% at August 25, 2012 [Member]
Line of Credit Facility [Line Items]
Commercial paper debt	$ 747,806,000	$ 513,402,000
Stated interest rate percentage					2.875%	2.875%	4.375%	4.375%	6.50%	6.50%
Debt instrument, due date					January 2023	January 2023	June 2013	June 2013	January 2014	January 2014
Remaining borrowing capacity under revolving credit facility	996,300,000
Amount available under credit facility	1,000,000,000
Commercial paper borrowings, maturity period (in months)													12
Expiration of credit facility	September 2016
Short-term borrowings	484,533,000	49,881,000												45,100,000	4,781,000
Proceeds from issuance of debt	300,000,000			300,000,000
Letter of credit facility maximum borrowing capacity			1,250,000,000								200,000,000	175,000,000
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	4,242,000,000	4,055,000,000
Excess (shortfall) of fair value of debt over (from) carrying value	$ 244,400,000	$ 286,600,000

XML

Segment Reporting (Tables)

6 Months Ended

Feb. 09, 2013

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						Twenty-Four Weeks Ended
(in thousands)	February 9, 2013			February 11, 2012			February 9, 2013			February 11, 2012
Net Sales
Auto Parts Stores	$	1,796,280		$	1,762,903		$	3,745,003		$	3,647,041
Other		58,918			41,166			101,235			81,370
Total	$	1,855,198		$	1,804,069		$	3,846,238		$	3,728,411
Segment Profit
Auto Parts Stores	$	924,704		$	894,493		$	1,924,039		$	1,846,850
Other		37,277			31,722			69,808			62,992
Gross profit		961,981			926,215			1,993,847			1,909,842
Operating, selling, general and administrative expenses		(644,410	)		(625,564	)		(1,312,999	)		(1,268,257	)
Interest expense, net		(41,323	)		(38,923	)		(82,428	)		(78,017	)
Income before income taxes	$	276,248		$	261,728		$	598,420		$	563,568

XML

General - Additional Information (Detail)	3 Months Ended	6 Months Ended
	Feb. 09, 2013	Feb. 09, 2013
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Description of reporting periods	Operating results for the twelve and twenty-four weeks ended February 9, 2013, are not necessarily indicative of the results that may be expected for the fiscal year ending August 31, 2013. 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 2013 has 17 weeks and for fiscal 2012 had 16 weeks. Additionally, the Company’s business is somewhat seasonal in nature, with the highest sales generally occurring during the months of February through September and the lowest sales generally occurring in the months of December and January.	Operating results for the twelve and twenty-four weeks ended February 9, 2013, are not necessarily indicative of the results that may be expected for the fiscal year ending August 31, 2013. 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 2013 has 17 weeks and for fiscal 2012 had 16 weeks. Additionally, the Company’s business is somewhat seasonal in nature, with the highest sales generally occurring during the months of February through September and the lowest sales generally occurring in the months of December and January.

XML

General

6 Months Ended

Feb. 09, 2013

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 25, 2012.

Operating results for the twelve and twenty-four weeks ended February 9, 2013, are not necessarily indicative of the results that may be expected for the fiscal year ending August 31, 2013. 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 2013 has 17 weeks and for fiscal 2012 had 16 weeks. Additionally, the Company’s business is somewhat seasonal in nature, with the highest sales generally occurring during the months of February through September and the lowest sales generally occurring in the months of December and January.

Recently Issued Accounting Pronouncements: In February 2013, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) No. 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 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 does not expect the provision of ASU 2013-02 to have a material impact on its consolidated financial statements. This update will be effective for the Company at the beginning of its fiscal 2014 year.

XML

Share-Based Payments - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Feb. 09, 2013	Feb. 11, 2012	Feb. 09, 2013	Feb. 11, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense related to stock options and share purchase plans	$ 8.5	$ 7.5	$ 16.6	$ 15.0
Stock options exercised - Shares			413,485	294,387
Stock options exercised - Weighted average exercise price			$ 129.00	$ 113.18
Stock options granted			355,560	377,130
Weighted average grant date fair value of options granted			$ 98.09	$ 93.42
Anti-dilutive shares excluded from the computation of earnings per share	375,980	1,500	375,980	1,500

XML

Merchandise Inventories - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Feb. 09, 2013	Aug. 25, 2012
Inventories Net [Line Items]
Unrecorded adjustment for LIFO value in excess of replacement value	$ 280.7	$ 270.4

XML

Segment Reporting - Additional Information (Detail)	6 Months Ended
	Feb. 09, 2013 Segment Store
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	5,070

XML

CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Feb. 09, 2013	Aug. 25, 2012
Current assets:
Cash and cash equivalents	$ 115,548	$ 103,093
Accounts receivable	160,420	161,375
Merchandise inventories	2,758,543	2,627,983
Other current assets	87,789	85,649
Deferred income taxes	1,068	846
Total current assets	3,123,368	2,978,946
Property and equipment:
Property and equipment	4,839,902	4,659,761
Less: Accumulated depreciation and amortization	(1,895,353)	(1,803,833)
Property and equipment, net	2,944,549	2,855,928
Goodwill	385,985	302,645
Deferred income taxes	40,579	33,796
Other long-term assets	167,707	94,324
Other long-term assets, total	594,271	430,765
Assets	6,662,188	6,265,639
Current liabilities:
Accounts payable	3,034,017	2,926,740
Accrued expenses and other	462,858	478,085
Income taxes payable	69,063	17,053
Deferred income taxes	181,337	183,833
Short-term borrowings	484,533	49,881
Total current liabilities	4,231,808	3,655,592
Long-term debt	3,513,273	3,718,302
Other long-term liabilities	467,216	439,770
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; 36,410 shares issued and 36,079 shares outstanding as of February 9, 2013; 39,869 shares issued and 37,028 shares outstanding as of August 25, 2012	364	399
Additional paid-in capital	717,605	689,890
Retained deficit	(2,015,717)	(1,033,197)
Accumulated other comprehensive loss	(134,908)	(152,013)
Treasury stock, at cost	(117,453)	(1,053,104)
Total stockholders' deficit	(1,550,109)	(1,548,025)
Liabilities and Stockholders' Deficit	$ 6,662,188	$ 6,265,639

XML

Stock Repurchase Program - Additional Information (Detail) (USD $)	1 Months Ended	6 Months Ended		182 Months Ended
	Sep. 28, 2012	Feb. 09, 2013	Feb. 09, 2012	Feb. 09, 2013
Stock Repurchase Program [Line Items]
Stock repurchased authorized value	$ 11,900,000,000
Stock repurchased cumulative, shares				132,500,000
Stock repurchased during period, shares		1,367,832
Purchase of treasury stock		502,300,000
Remaining value authorized for share repurchases		603,400,000		603,400,000
Stock repurchase authorized during the period, value	750,000,000
Stock repurchase authorized amended value	12,650,000,000
Treasury stock acquired repurchase authorization		From January 1, 1998 to February 9, 2013, the Company has repurchased a total of 132.5 million shares at an aggregate cost of $12.0 billion, including 1,367,832 shares of its common stock at an aggregate cost of $502.3 million during the twenty-four week period ended February 9, 2013. On September 28, 2012, the Board voted to increase the authorization by $750 million to raise the cumulative share repurchase authorization from $11.90 billion to $12.65 billion. Considering the cumulative repurchases as of February 9, 2013, the Company had $603.4 million remaining under the Board’s authorization to repurchase its common stock. The Company did not repurchase shares of its common stock subsequent to February 9, 2013.
Stock repurchased during period, amount				12,000,000,000
Share of treasury stock retired		3,900,000	4,900,000
Retained deficit [Member]
Stock Repurchase Program [Line Items]
Treasury stock retired, cost method		1,362,200,000	1,319,600,000
Additional paid-in capital [Member]
Stock Repurchase Program [Line Items]
Treasury stock retired, cost method		$ 75,700,000	72,500,000

XML

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Feb. 09, 2013	Feb. 11, 2012	Feb. 09, 2013	Feb. 11, 2012
Pension liability adjustments, taxes	$ 1,295	$ 1,117	$ 3,193	$ 9,276
Unrealized loss adjustment on marketable securities net of taxes	36	81	31	60
Net losses on outstanding derivatives, taxes	$ 155	$ 150	$ 258	$ 2,320

XML

Fair Value Measurements - Additional Information (Detail) (USD $)	Feb. 09, 2013	Dec. 19, 2012	Dec. 19, 2012 Maximum [Member]	Dec. 19, 2012 First year [Member]	Dec. 19, 2012 Second year [Member]	Feb. 09, 2013 Fair Value, Measurements, Recurring [Member]	Aug. 25, 2012 Fair Value, Measurements, Recurring [Member]
Business Acquisition [Line Items]
Short-term marketable securities						$ 15,028,000	$ 22,515,000
Long-term marketable securities						67,175,000	53,699,000
Acquisition of assets and liabilities		150,000,000
Initial cash payment		115,000,000
Holdback payment for working capital true-ups		5,000,000
Contingent payments, total		30,000,000	30,000,000	10,000,000	30,000,000
Estimated fair value of the performance-based contingent consideration		22,700,000
Contingent liability, current	7,600,000
Contingent liability, non-current	$ 15,400,000

XML

General (Policies)

6 Months Ended

Feb. 09, 2013

Recently Issued Accounting Pronouncements

Recently Issued Accounting Pronouncements: In February 2013, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) No. 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 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 does not expect the provision of ASU 2013-02 to have a material impact on its consolidated financial statements. This update will be effective for the Company at the beginning of its fiscal 2014 year.

XML

Fair Value Measurements - Change in Contingent Consideration Liability at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Feb. 09, 2013	Feb. 09, 2013
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value - beginning of period
Fair value of contingent consideration issued during the period	(22,678)	(22,678)
Change in fair value	(327)	(327)
Fair value - end of period	$ (23,005)	$ (23,005)

XML

Fair Value Measurements (Tables)

6 Months Ended

Feb. 09, 2013

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:

	February 9, 2013
(in thousands)	Level 1		Level 2		Level 3			Fair Value
Short-term marketable securities	$	15,028	$	—	$	—		$	15,028
Long-term marketable securities		50,395		16,780		—			67,175
	$	65,423	$	16,780	$	—		$	82,203
Contingent consideration	$	—	$	—	$	(23,005	)	$	(23,005	)

	August 25, 2012
(in thousands)	Level 1		Level 2			Level 3		Fair Value
Short-term marketable securities	$	22,515	$	—		$	—	$	22,515
Long-term marketable securities		40,424		13,275			—		53,699
	$	62,939	$	13,275		$	—	$	76,214
Derivative instruments	$	—	$	(4,915	)	$	—	$	(4,915	)

Change in Contingent Consideration Liability at Fair Value on Recurring Basis

The change in the contingent consideration liability, which is a Level 3 liability measured at fair value on a recurring basis, is summarized as follows:

(in thousands)	Twelve Weeks  Ended February 9, 2013			Twenty-Four Weeks Ended February 9, 2013
Fair value – beginning of period	$	—		$	—
Fair value of contingent consideration issued during the period		(22,678	)		(22,678	)
Change in fair value		(327	)		(327	)
Fair value – end of period	$	(23,005	)	$	(23,005	)

XML

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Feb. 09, 2013	Feb. 11, 2012
Cash flows from operating activities:
Net income	$ 379,698	$ 358,055
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	103,044	96,170
Amortization of debt origination fees	3,905	3,573
Income tax benefit from exercise of stock options	(33,706)	(21,793)
Deferred income taxes	(12,911)	5,956
Share-based compensation expense	16,616	15,045
Changes in operating assets and liabilities:
Accounts receivable	4,369	(3,796)
Merchandise inventories	(123,177)	(113,450)
Accounts payable and accrued expenses	69,441	49,095
Income taxes payable	85,512	58,511
Other, net	18,052	13,848
Net cash provided by operating activities	510,843	461,214
Cash flows from investing activities:
Capital expenditures	(169,613)	(132,430)
Acquisition of business	(115,000)
Purchase of marketable securities	(22,288)	(18,970)
Proceeds from sale of marketable securities	16,212	16,403
Disposal of capital assets and other, net	908	5,803
Net cash used in investing activities	(289,781)	(129,194)
Cash flows from financing activities:
Net proceeds from commercial paper	234,400	117,200
Net payments of short-term borrowings	(4,883)	(3,548)
Proceeds from issuance of debt	300,000
Repayment of debt	(300,000)
Net proceeds from sale of common stock	53,423	33,050
Purchase of treasury stock	(502,348)	(482,270)
Income tax benefit from exercise of stock options	33,706	21,793
Payments of capital lease obligations	(14,728)	(12,485)
Other, net	(8,637)
Net cash used in financing activities	(209,067)	(326,260)
Effect of exchange rate changes on cash	460	(159)
Net increase in cash and cash equivalents	12,455	5,601
Cash and cash equivalents at beginning of period	103,093	97,606
Cash and cash equivalents at end of period	$ 115,548	$ 103,207

XML

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Feb. 09, 2013	Aug. 25, 2012
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	36,410	39,869
Common stock, shares outstanding	36,079	37,028

XML

Accumulated Other Comprehensive Loss

6 Months Ended

Feb. 09, 2013

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 consisted of the following:

(in thousands)	Pension Liability			Foreign Currency  (1)			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)		3,473			13,261			(57	)		428			17,105
Balance at February 9, 2013	$	(90,494	)	$	(37,006	)	$	294		$	(7,702	)	$	(134,908	)

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

XML

Document and Entity Information	6 Months Ended
	Feb. 09, 2013	Mar. 04, 2013
Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Feb. 09, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2
Trading Symbol	AZO
Entity Registrant Name	AUTOZONE INC
Entity Central Index Key	0000866787
Current Fiscal Year End Date	--08-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		36,080,610

XML

Acquisition

6 Months Ended

Feb. 09, 2013

Acquisition

Note K – Acquisition

Effective December 19, 2012, the Company acquired certain assets and liabilities of AutoAnything, an online retailer of specialized automotive products for up to $150 million, including an initial cash payment of $115 million, a $5 million holdback payment for working capital true-ups, and contingent payments not to exceed $30 million. With this acquisition, the Company expects to bolster its online presence in the high-end, automotive accessory and performance markets. The results of operations from AutoAnything have been included in the Company’s Other business activities since the date of acquisition. Pro forma results of operations related to the acquisition of AutoAnything are not presented as AutoAnything’s results are not material to the Company’s condensed consolidated statements of operations. The purchase price allocation resulted in goodwill of $83.3 million and intangible assets totaling $58.8 million. Goodwill generated from the acquisition is tax deductible and is primarily attributable to expected synergies and the assembled workforce. The contingent consideration is based on the achievement of certain performance metrics through calendar year 2014 with any earned payments due during the first calendar quarter of 2014 and 2015. The fair value of the contingent consideration as of the acquisition date was $22.7 million.

XML

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Feb. 09, 2013	Feb. 11, 2012	Feb. 09, 2013	Feb. 11, 2012
Net sales	$ 1,855,198	$ 1,804,069	$ 3,846,238	$ 3,728,411
Cost of sales, including warehouse and delivery expenses	893,217	877,854	1,852,391	1,818,569
Gross profit	961,981	926,215	1,993,847	1,909,842
Operating, selling, general and administrative expenses	644,410	625,564	1,312,999	1,268,257
Operating profit	317,571	300,651	680,848	641,585
Interest expense, net	41,323	38,923	82,428	78,017
Income before income taxes	276,248	261,728	598,420	563,568
Income taxes	100,001	94,798	218,722	205,513
Net income	$ 176,247	$ 166,930	$ 379,698	$ 358,055
Weighted average shares for basic earnings per share	36,258	39,281	36,552	39,573
Effect of dilutive stock equivalents	646	956	694	978
Adjusted weighted average shares for diluted earnings per share	36,904	40,237	37,246	40,551
Basic earnings per share	$ 4.86	$ 4.25	$ 10.39	$ 9.05
Diluted earnings per share	$ 4.78	$ 4.15	$ 10.19	$ 8.83

XML

Derivative Financial Instruments

6 Months Ended

Feb. 09, 2013

Derivative Financial Instruments

Note E – Derivative Financial Instruments

During the fourth quarter of fiscal 2012, the Company entered into two treasury rate locks, each with a notional amount of $100 million. These agreements were cash flow hedges used to hedge the exposure to variability in future cash flows resulting from changes in variable interest rates related to the $300 million Senior Note debt issuance in November 2012. The fixed rates of the hedges were 2.07% and 1.92% and were benchmarked based on the 10-year U.S. treasury notes. These locks expired on November 1, 2012 and resulted in a loss of $5.1 million, which has been deferred in Accumulated other comprehensive loss and will be reclassified to Interest expense over the life of the underlying debt. The hedges remained highly effective until they expired, and no ineffectiveness was recognized in earnings.

During the third quarter of fiscal 2012, the Company entered into two treasury rate locks. These agreements were designated as cash flow hedges and were used to hedge the exposure to variability in future cash flows resulting from changes in variable interest rates related to the $500 million Senior Note debt issuance in April 2012. The treasury rate locks had notional amounts of $300 million and $100 million with associated fixed rates of 2.09% and 2.07% respectively. The locks were benchmarked based on the 10-year U.S. treasury notes. These locks expired on April 20, 2012 and resulted in a loss of $2.8 million, which has been deferred in Accumulated other comprehensive loss and will be reclassified to Interest expense over the life of the underlying debt. The hedges remained highly effective until they expired, and no ineffectiveness was recognized in earnings.

At February 9, 2013, the Company had $12.2 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 twenty-four week period ended February 9, 2013, the Company reclassified $831 thousand of net losses from Accumulated other comprehensive loss to Interest expense. In the comparable prior year period, the Company reclassified $813 thousand of net losses from Accumulated other comprehensive loss to Interest expense. The Company expects to reclassify $545 thousand of net losses from Accumulated other comprehensive loss to Interest expense over the next 12 months.

XML

Marketable Securities

6 Months Ended

Feb. 09, 2013

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:

	February 9, 2013
(in thousands)	Amortized Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate securities	$	29,624	$	290	$	(3	)	$	29,911
Government bonds		21,575		58		(1	)		21,632
Mortgage-backed securities		8,453		23		(33	)		8,443
Asset-backed securities and other		22,097		120		—			22,217
	$	81,749	$	491	$	(37	)	$	82,203

	August 25, 2012
(in thousands)	Amortized Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate securities	$	26,215	$	307	$	—		$	26,522
Government bonds		20,790		117		(1	)		20,906
Mortgage-backed securities		4,369		17		(19	)		4,367
Asset-backed securities and other		24,299		120		—			24,419
	$	75,673	$	561	$	(20	)	$	76,214

The debt securities held at February 9, 2013, 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 twenty-four week period ended February 9, 2013.

The Company holds twelve securities that are in an unrealized loss position of approximately $37 thousand at February 9, 2013. 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.

XML

Share-Based Payments (Tables)

6 Months Ended

Feb. 09, 2013

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

The weighted average fair value of the stock option awards granted during the twenty-four week periods ended February 9, 2013, and February 11, 2012, using the Black-Scholes-Merton multiple-option pricing valuation model, was $98.09 and $93.42 per share, respectively, using the following weighted average key assumptions:

	Twenty-Four Weeks Ended
	February 9, 2013			February 11, 2012
Expected price volatility		29	%		31	%
Risk-free interest rate		0.5	%		0.7	%
Weighted average expected lives (in years)		5.2			5.3
Forfeiture rate		10	%		10	%
Dividend yield		0	%		0	%

XML

Goodwill and Intangibles

6 Months Ended

Feb. 09, 2013

Goodwill and Intangibles

Note L – 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 26, 2012	$	302,645	$	—	$	302,645
Goodwill added through acquisition (1)		—		83,340		83,340
Goodwill adjustments		—		—		—
Net balance as of February 9, 2013	$	302,645	$	83,340	$	385,985

(1) See Note K for discussion of the acquisition completed during the twenty-four weeks ended February 9, 2013

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

	February 9, 2013
(in thousands)	Estimated Useful Life		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Technology		5 years	$	9,800	$	(285	)	$	9,515
Noncompete agreement		5 years		1,300		(38	)		1,262
Customer relationships		10 years		19,000		(277	)		18,723
Tradename		Indefinite		28,700		—			28,700
			$	58,800	$	(600	)	$	58,200

Amortization expense of intangible assets for the twelve and twenty-four weeks ended February 9, 2013, was $0.6 million.

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 February 9, 2013, is estimated as follows:

(in thousands)	Total
Remainder of 2013	$	2,298
2014		4,120
2015		4,120
2016		4,120
2017		4,120
Thereafter		10,722
	$	29,500

XML

Financing

6 Months Ended

Feb. 09, 2013

Financing

Note H – Financing

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

(in thousands)	February 9, 2013			August 25, 2012
5.875% Senior Notes due October 2012, effective interest rate of 6.33%	$	—		$	300,000
4.375% Senior Notes due June 2013, effective interest rate of 5.65%		200,000			200,000
6.500% Senior Notes due January 2014, effective interest rate of 6.63%		500,000			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
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			—
Commercial paper, weighted average interest rate of 0.38% and 0.42% at February 9, 2013 and August 25, 2012, respectively		747,806			513,402
Unsecured, peso denominated borrowings, weighted average interest rate of 4.57% at August 25, 2012		—			4,781
Total debt		3,997,806			3,768,183
Less: Short-term borrowings		(484,533	)		(49,881	)
Long-term debt	$	3,513,273		$	3,718,302

As of February 9, 2013, $263.3 million of the commercial paper borrowings, the 4.375% Senior Notes due June 2013, and the 6.500% Senior Notes due January 2014, mature in the next twelve months, but are classified as long-term in the accompanying Condensed Consolidated Balance Sheets, as the Company has the ability and intent to refinance them on a long-term basis. Specifically, excluding the effect of commercial paper borrowings, the Company had $996.3 million of availability under its $1.0 billion revolving credit facility, expiring in September 2016, which would allow it to replace these short-term obligations with long-term financing.

As of February 9, 2013, the Company had $484.5 million of short-term borrowings that are scheduled to mature in the next twelve months. At August 25, 2012, the Company had $49.9 million of short-term borrowings that included $45.1 million of commercial paper borrowings and $4.8 million of unsecured, peso denominated borrowings.

On November 13, 2012, the Company issued $300 million in 2.875% Senior Notes due January 2023 under its 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 November 13, 2012, were used to repay a portion of the outstanding commercial paper borrowings, and for general corporate purposes.

In September 2011, the Company amended and restated its revolving credit facility, increasing the capacity under the revolving credit facility to $1.0 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 $1.250 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 2016.

The fair value of the Company’s debt was estimated at $4.242 billion as of February 9, 2013, and $4.055 billion as of August 25, 2012, 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 $244.4 million at February 9, 2013, and $286.6 million at August 25, 2012.

XML

Merchandise Inventories

6 Months Ended

Feb. 09, 2013

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 $280.7 million at February 9, 2013, and $270.4 million at August 25, 2012.

XML

Pension and Savings Plans

6 Months Ended

Feb. 09, 2013

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						Twenty-Four Weeks Ended
(in thousands)	February  9, 2013			February  11, 2012			February  9, 2013			February  11, 2012
Interest cost	$	2,659		$	2,819		$	5,318		$	5,637
Expected return on plan assets		(3,083	)		(2,704	)		(6,166	)		(5,408	)
Amortization of net loss		3,333			2,260			6,666			4,521
Net periodic pension expense	$	2,909		$	2,375		$	5,818		$	4,750

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 twenty-four week period ended February 9, 2013, the Company made contributions to its funded plan in the amount of $4.1 million. The Company expects to contribute approximately $13.7 million to the plan during the remainder of fiscal 2013; 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.

XML

Stock Repurchase Program

6 Months Ended

Feb. 09, 2013

Stock Repurchase Program

Note I – Stock Repurchase Program

From January 1, 1998 to February 9, 2013, the Company has repurchased a total of 132.5 million shares at an aggregate cost of $12.0 billion, including 1,367,832 shares of its common stock at an aggregate cost of $502.3 million during the twenty-four week period ended February 9, 2013. On September 28, 2012, the Board voted to increase the authorization by $750 million to raise the cumulative share repurchase authorization from $11.90 billion to $12.65 billion. Considering the cumulative repurchases as of February 9, 2013, the Company had $603.4 million remaining under the Board’s authorization to repurchase its common stock. The Company did not repurchase shares of its common stock subsequent to February 9, 2013.

During the twenty-four week period ended February 9, 2013, the Company retired 3.9 million shares of treasury stock which had previously been repurchased under the Company’s share repurchase program. The retirement increased Retained deficit by $1,362.2 million and decreased Additional paid-in capital by $75.7 million. During the comparable prior year period, the Company retired 4.9 million shares of treasury stock, which increased Retained deficit by $1,319.6 million and decreased Additional paid-in capital by $72.5 million.

XML

Fair Value Measurements - Company's Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	Feb. 09, 2013	Aug. 25, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term marketable securities	$ 15,028	$ 22,515
Long-term marketable securities	67,175	53,699
Total	82,203	76,214
Contingent consideration	(23,005)
Derivative instruments		(4,915)
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term marketable securities	15,028	22,515
Long-term marketable securities	50,395	40,424
Total	65,423	62,939
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term marketable securities	16,780	13,275
Total	16,780	13,275
Derivative instruments		(4,915)
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration	$ (23,005)

XML

Goodwill and Intangibles - Schedule of Future Amortization Expense for Finite Lived Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Feb. 09, 2013
Finite-Lived Intangible Assets [Line Items]
Remainder of 2013	$ 2,298
2014	4,120
2015	4,120
2016	4,120
2017	4,120
Thereafter	10,722
Total future amortization expense	$ 29,500

XML

Segment Reporting

6 Months Ended

Feb. 09, 2013

Segment Reporting

Note N – Segment Reporting

Three of the Company’s 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 25, 2012.

The Auto Parts Stores segment is a retailer and distributor of automotive parts and accessories through the Company’s 5,070 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, including 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						Twenty-Four Weeks Ended
(in thousands)	February 9, 2013			February 11, 2012			February 9, 2013			February 11, 2012
Net Sales
Auto Parts Stores	$	1,796,280		$	1,762,903		$	3,745,003		$	3,647,041
Other		58,918			41,166			101,235			81,370
Total	$	1,855,198		$	1,804,069		$	3,846,238		$	3,728,411
Segment Profit
Auto Parts Stores	$	924,704		$	894,493		$	1,924,039		$	1,846,850
Other		37,277			31,722			69,808			62,992
Gross profit		961,981			926,215			1,993,847			1,909,842
Operating, selling, general and administrative expenses		(644,410	)		(625,564	)		(1,312,999	)		(1,268,257	)
Interest expense, net		(41,323	)		(38,923	)		(82,428	)		(78,017	)
Income before income taxes	$	276,248		$	261,728		$	598,420		$	563,568

XML

Pension and Savings Plans (Tables)

6 Months Ended

Feb. 09, 2013

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						Twenty-Four Weeks Ended
(in thousands)	February 9, 2013			February 11, 2012			February 9, 2013			February 11, 2012
Interest cost	$	2,659		$	2,819		$	5,318		$	5,637
Expected return on plan assets		(3,083	)		(2,704	)		(6,166	)		(5,408	)
Amortization of net loss		3,333			2,260			6,666			4,521
Net periodic pension expense	$	2,909		$	2,375		$	5,818		$	4,750

XML

Goodwill and Intangibles - Schedule of Carrying Amounts of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Feb. 09, 2013
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 58,800
Accumulated Amortization	(600)
Net Carrying Amount	58,200
Technology [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Gross Carrying Amount	9,800
Accumulated Amortization	(285)
Net Carrying Amount	9,515
Noncompete agreement [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Gross Carrying Amount	1,300
Accumulated Amortization	(38)
Net Carrying Amount	1,262
Customer relationships [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	10 years
Gross Carrying Amount	19,000
Accumulated Amortization	(277)
Net Carrying Amount	18,723
Tradename [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	28,700
Net Carrying Amount	$ 28,700
Estimated Useful Life	Indefinite

XML

Pension and Savings Plans - Net Periodic Pension Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Feb. 09, 2013	Feb. 11, 2012	Feb. 09, 2013	Feb. 11, 2012
Pension And Other Employee Benefit Plans [Line Items]
Interest cost	$ 2,659	$ 2,819	$ 5,318	$ 5,637
Expected return on plan assets	(3,083)	(2,704)	(6,166)	(5,408)
Amortization of net loss	3,333	2,260	6,666	4,521
Net periodic pension expense	$ 2,909	$ 2,375	$ 5,818	$ 4,750

XML

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Feb. 09, 2013		Feb. 11, 2012		Feb. 09, 2013		Feb. 11, 2012
Net income	$ 176,247		$ 166,930		$ 379,698		$ 358,055
Other comprehensive loss (income):
Pension liability adjustments, net of taxes	2,038	[1]	3,378	[1]	3,473	[1]	13,797	[1]
Foreign currency translation adjustments	15,320		20,726		13,261		(3,261)
Unrealized (gains) losses on marketable securities, net of taxes	(67)	[2]	150	[2]	(57)	[2]	(111)	[2]
Net derivative activities, net of taxes	263	[3]	255	[3]	428	[3]	3,132	[3]
Total other comprehensive loss	17,554		24,509		17,105		13,557
Comprehensive income	$ 193,801		$ 191,439		$ 396,803		$ 371,612

[1] Pension liability adjustments are presented net of taxes of $1,295 in fiscal 2013 and $1,117 in fiscal 2012 for the twelve weeks ended and $3,193 in fiscal 2013 and $9,276 in fiscal 2012 for the twenty-four weeks ended

[2] Unrealized (gains) losses on marketable securities are presented net of taxes of $36 in fiscal 2013 and $81 in fiscal 2012 for the twelve weeks ended and $31 in fiscal 2013 and $60 in fiscal 2012 for the twenty-four weeks ended

[3] Net derivative activities are presented net of taxes of $155 in fiscal 2013 and $150 in fiscal 2012 for the twelve weeks ended and $258 in fiscal 2013 and $2,320 in fiscal 2012 for the twenty-four weeks ended

XML

Fair Value Measurements

6 Months Ended

Feb. 09, 2013

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:

	February 9, 2013
(in thousands)	Level 1		Level 2		Level 3			Fair Value
Short-term marketable securities	$	15,028	$	—	$	—		$	15,028
Long-term marketable securities		50,395		16,780		—			67,175
	$	65,423	$	16,780	$	—		$	82,203
Contingent consideration	$	—	$	—	$	(23,005	)	$	(23,005	)

	August 25, 2012
(in thousands)	Level 1		Level 2			Level 3		Fair Value
Short-term marketable securities	$	22,515	$	—		$	—	$	22,515
Long-term marketable securities		40,424		13,275			—		53,699
	$	62,939	$	13,275		$	—	$	76,214
Derivative instruments	$	—	$	(4,915	)	$	—	$	(4,915	)

At February 9, 2013, the fair value measurement amounts for assets and liabilities recorded in the accompanying Condensed Consolidated Balance Sheet consisted of short-term marketable securities of $15.0 million, which are included within Other current assets, and long-term marketable securities of $67.2 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”.

Effective December 19, 2012, the Company acquired certain assets and liabilities of AutoAnything, an online retailer of specialized automotive products for up to $150 million, including an initial cash payment of $115 million, a $5 million holdback payment for working capital true-ups, and contingent payments totaling up to $30 million. The contingent consideration is based on the performance of AutoAnything, and is not subject to continued employment by the selling stockholders. Based on specific operating income targets for each year, the sellers can receive up to $10 million in the first year, and up to $30 million in the second year, with contingent consideration not exceeding $30 million in the aggregate. As these performance-based contingent consideration payments are not subject to continued employment by the selling stockholders, the estimated fair value of the performance-based contingent consideration of $22.7 million was included as part of the purchase price allocation at the time of acquisition. The Company determined the fair value of the contingent consideration based on a probability-weighted discounted cash flow analysis. The fair value measurement is based on significant inputs not observable in the market and thus represents a Level 3 measurement as defined in the fair value hierarchy. In each period, the Company reassesses its current estimates of performance relative to the stated targets and adjusts the liability to fair value. As of February 9, 2013, the contingent liability is reflected as a current liability of $7.6 million in Accrued expenses and other and a non-current liability of $15.4 million in Other long-term liabilities in the accompanying Condensed Consolidated Balance Sheet. A discussion of the acquisition is included in “Note K – Acquisition”.

The change in the contingent consideration liability, which is a Level 3 liability measured at fair value on a recurring basis, is summarized as follows:

(in thousands)	Twelve Weeks  Ended February 9, 2013			Twenty-Four Weeks Ended February 9, 2013
Fair value – beginning of period	$	—		$	—
Fair value of contingent consideration issued during the period		(22,678	)		(22,678	)
Change in fair value		(327	)		(327	)
Fair value – end of period	$	(23,005	)	$	(23,005	)

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

Non-financial assets could be 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 twenty-four week periods ended February 9, 2013 and February 11, 2012, 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”.

XML

Financing (Tables)

6 Months Ended

Feb. 09, 2013

Schedule of Total Debt

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

(in thousands)	February 9, 2013			August 25, 2012
5.875% Senior Notes due October 2012, effective interest rate of 6.33%	$	—		$	300,000
4.375% Senior Notes due June 2013, effective interest rate of 5.65%		200,000			200,000
6.500% Senior Notes due January 2014, effective interest rate of 6.63%		500,000			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
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			—
Commercial paper, weighted average interest rate of 0.38% and 0.42% at February 9, 2013 and August 25, 2012, respectively		747,806			513,402
Unsecured, peso denominated borrowings, weighted average interest rate of 4.57% at August 25, 2012		—			4,781
Total debt		3,997,806			3,768,183
Less: Short-term borrowings		(484,533	)		(49,881	)
Long-term debt	$	3,513,273		$	3,718,302

XML

Marketable Securities - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Feb. 09, 2013 Security
Marketable Securities [Line Items]
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 securities in continuous unrealized loss position amount	$ 37

XML

Litigation

6 Months Ended

Feb. 09, 2013

Litigation

Note M – 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 (“Directive”), that the Company is liable for the downgradient impacts under a joint and severable liability theory, and the Company intends to contest these assertions due to the existence of other entities/sources of contamination, some of which are also named in the Directive, 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.