10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

x Annual Report pursuant to section 13 or 15(d) of the Securities Exchange Act of 1934

For the fiscal year ended August 31, 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)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Name of each exchange on which registered
Common Stock ($.01 par value)	New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act:

None

Indicate by check mark if the Registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes  x    No  ¨

Indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    Yes  ¨    No  x

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 period 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 if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§ 229.405 of this chapter) is not contained herein, and will not be contained, to the best of Registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.  x

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.

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 Act).    Yes  ¨    No  x

The aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which the common equity was last sold, or the average bid and asked price of such common equity, as of the last business day of the registrant’s most recently completed second fiscal quarter was $13,781,127,110.

The number of shares of Common Stock outstanding as of October 21, 2013, was 34,031,760.

Documents Incorporated By Reference

Portions of the definitive Proxy Statement to be filed within 120 days of August 31, 2013, pursuant to Regulation 14A under the Securities Exchange Act of 1934 for the Annual Meeting of Stockholders to be held December 18, 2013, are incorporated by reference into Part III.

TABLE OF CONTENTS

PART I		4
Item 1.	Business	4
	Introduction	4
	Marketing and Merchandising Strategy	5
	Commercial	6
	Store Operations	7
	Store Development	8
	Purchasing and Supply Chain	8
	Competition	8
	Trademarks and Patents	9
	Employees	9
	AutoZone Websites	9
	Executive Officers of the Registrant	9
Item 1A.	Risk Factors	11
Item 1B.	Unresolved Staff Comments	14
Item 2.	Properties	15
Item 3.	Legal Proceedings	15
Item 4.	Mine Safety Disclosures	15
PART II		16
Item 5.	Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	16
Item 6.	Selected Financial Data	18
Item 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	19
Item 7A.	Quantitative and Qualitative Disclosures About Market Risk	33
Item 8.	Financial Statements and Supplementary Data	35
Item 9.	Changes In and Disagreements with Accountants on Accounting and Financial Disclosure	69
Item 9A.	Controls and Procedures	69
Item 9B.	Other Information	69
PART III		70
Item 10.	Directors, Executive Officers and Corporate Governance	70
Item 11.	Executive Compensation	70
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	70
Item 13.	Certain Relationships and Related Transactions, and Director Independence	70
Item 14.	Principal Accounting Fees and Services	70
PART IV		71
Item 15.	Exhibits and Financial Statement Schedules	71

2

Forward-Looking Statements

Certain statements contained in this annual report 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 this Annual Report on Form 10-K for the year ended August 31, 2013, and these Risk Factors should be read carefully. Forward-looking statements are not guarantees of future performance and actual results; developments and business decisions may differ from those contemplated by such forward-looking statements, and events described above and in the “Risk Factors” could materially and adversely affect our business. Forward-looking statements speak only as of the date made. Except as required by applicable law, we undertake no obligation to update publicly any forward-looking statements, whether as a result of new information, future events or otherwise. Actual results may materially differ from anticipated results.

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PART I

Item  1. Business

Introduction

AutoZone, Inc. (“AutoZone,” the “Company,” “we,” “our” or “us”) is 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 August 31, 2013, operated 4,836 stores in the United States, including Puerto Rico; 362 in Mexico; and three 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 August 31, 2013, in 3,421 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 also have commercial programs in select stores in Mexico, as well as in our stores in Brazil. We also sell the ALLDATA brand automotive diagnostic and repair software through www.alldata.com. Additionally, we sell automotive hard parts, maintenance items, accessories, and non-automotive products through www.autozone.com, and accessories and performance parts through 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.

At August 31, 2013, our stores were in the following locations:

	Store Count
Alabama		103
Alaska		6
Arizona		124
Arkansas		61
California		521
Colorado		72
Connecticut		40
Delaware		13
Florida		255
Georgia		184
Idaho		23
Illinois		228
Indiana		148
Iowa		24
Kansas		41
Kentucky		87
Louisiana		115
Maine		7
Maryland		51
Massachusetts		77
Michigan		166
Minnesota		39
Mississippi		87
Missouri		105
Montana		10
Nebraska		15
Nevada		61
New Hampshire		21
New Jersey		74
New Mexico		62
New York		149
North Carolina		192
North Dakota		1
Ohio		241
Oklahoma		67
Oregon		38
Pennsylvania		142
Puerto Rico		34
Rhode Island		15
South Carolina		84
South Dakota		5
Tennessee		158
Texas		557
Utah		45
Vermont		2
Virginia		107
Washington		75
Washington, DC		5
West Virginia		35
Wisconsin		58
Wyoming		6
Total Domestic		4,836
Mexico		362
Brazil		3
Total		5,201

4

Marketing and Merchandising Strategy

We are dedicated to providing customers with superior service and trustworthy advice as well as quality automotive parts and products at a great value in conveniently located, well-designed stores. Key elements of this strategy are:

Customer Service

Customer service is the most important element in our marketing and merchandising strategy, which is based upon consumer marketing research. We emphasize that our AutoZoners (employees) should always put customers first by providing prompt, courteous service and trustworthy advice. Our electronic parts catalog assists in the selection of parts as well as warranties that are offered by us or our vendors on many of the parts that we sell. The wide area network in our stores helps us expedite credit or debit card and check approval processes, locate parts at neighboring AutoZone stores, including our hub stores, and in some cases, place special orders directly with our vendors. We sell automotive hard parts, maintenance items, accessories and non-automotive parts through www.autozone.com for pick-up in store or to be shipped directly to a customer’s home or business. Additionally, we offer smartphone apps that provide customers with store locations, driving directions, operating hours, and product availability.

Our stores generally open at 7:30 or 8 a.m. and close between 8 and 10 p.m. Monday through Saturday and typically open at 9 a.m. and close between 6 and 9 p.m. on Sunday. However, some stores are open 24 hours, and some have extended hours of 6 or 7 a.m. until midnight seven days a week.

We also provide specialty tools through our Loan-A-Tool program. Customers can borrow a specialty tool, such as a steering wheel puller, for which a do-it-yourself (“DIY”) customer or a repair shop would have little or no use other than for a single job. AutoZoners also provide other free services, including check engine light readings where allowed by law, battery charging, the collection of used oil for recycling, and the testing of starters, alternators, batteries, sensors and actuators.

5

Merchandising

The following tables show some of the types of products that we sell by major category of items:

Failure	Maintenance	Discretionary
A/C Compressors Batteries & Accessories Belts & Hoses Carburetors Chassis Clutches CV Axles Engines Fuel Pumps Fuses Ignition Lighting Mufflers Radiators Thermostats Starters & Alternators Water Pumps	Antifreeze & Windshield Washer Fluid Brake Drums, Rotors, Shoes & Pads Chemicals, including Brake & Power Steering Fluid, Oil & Fuel Additives Oil & Transmission Fluid Oil, Air, Fuel & Transmission Filters Oxygen Sensors Paint & Accessories Refrigerant & Accessories Shock Absorbers & Struts Spark Plugs & Wires Windshield Wipers	Air Fresheners Cell Phone Accessories Drinks & Snacks Floor Mats & Seat Covers Interior and Exterior Accessories Mirrors Performance Products Protectants & Cleaners Sealants & Adhesives Steering Wheel Covers Stereos & Radios Tools Wash & Wax

We believe that the satisfaction of our customers is often impacted by our ability to provide specific automotive products as requested. Each store carries the same basic products, but we tailor our inventory to the makes and models of the vehicles in each store’s trade area, and our sales floor products are tailored to the local store’s demographics. Our hub stores carry a larger assortment of products that are delivered to local satellite stores. We are constantly updating the products we offer to ensure that our inventory matches the products our customers need or desire.

Pricing

We want to be perceived by our customers as the value leader in our industry, by consistently providing quality merchandise at the right price, backed by a satisfactory warranty and outstanding customer service. For many of our products, we offer multiple value choices in a good/better/best assortment, with appropriate price and quality differences from the “good” products to the “better” and “best” products. A key differentiating component versus our competitors is our exclusive line of in-house brands, which includes the Econocraft, Valucraft, AutoZone, SureBilt, ProElite, Duralast, Duralast Gold, and Duralast Platinum brands. We believe that our overall value compares favorably to that of our competitors.

Brand Marketing: Advertising and Promotions

We believe that targeted advertising and promotions play important roles in succeeding in today’s environment. We are constantly working to understand our customers’ wants and needs so that we can build long-lasting, loyal relationships. We utilize promotions, advertising and loyalty card programs primarily to advise customers about the overall importance of vehicle maintenance, our great value and the availability of high quality parts. Broadcast and internet media are our primary advertising methods of driving traffic to our stores. We utilize in-store signage, in-store circulars, and creative product placement and promotions to help educate customers about products that they need.

Store Design and Visual Merchandising

We design and build stores for high visual impact. The typical AutoZone store utilizes colorful exterior and interior signage, exposed beams and ductwork and brightly lit interiors. Maintenance products, accessories and non-automotive items are attractively displayed for easy browsing by customers. In-store signage and special displays promote products on floor displays, end caps and shelves.

Commercial

Our commercial sales program operates in a highly fragmented market, and we are one of the leading distributors of automotive parts and other products to local, regional and national repair garages, dealers, service stations and

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public sector accounts in the United States, Puerto Rico, Mexico and Brazil. As a part of the program, we offer credit and delivery to our customers, as well as online ordering through www.autozonepro.com. Through our hub stores, we offer a greater range of parts and products desired by professional technicians. We have dedicated sales teams focused on independent repair shops as well as national, regional and public sector commercial accounts.

Store Operations

Store Formats

Substantially all AutoZone stores are based on standard store formats, resulting in generally consistent appearance, merchandising and product mix. Approximately 85% to 90% of each store’s square footage is selling space, of which approximately 40% to 45% is dedicated to hard parts inventory. The hard parts inventory area is generally fronted by counters or pods that run the depth or length of the store, dividing the hard parts area from the remainder of the store. The remaining selling space contains displays of maintenance, accessories and non-automotive items.

We believe that our stores are “destination stores,” generating their own traffic rather than relying on traffic created by adjacent stores. Therefore, we situate most stores on major thoroughfares with easy access and good parking.

Store Personnel and Training

Each store typically employs from 10 to 16 AutoZoners, including a manager and, in some cases, an assistant manager. We provide on-the-job training as well as formal training programs, including an annual national sales meeting, regular store meetings on specific sales and product issues, standardized training manuals and a specialist program that provides training to AutoZoners in several areas of technical expertise from the Company, our vendors and independent certification agencies. All AutoZoners are encouraged to complete tests resulting in certifications by the National Institute for Automotive Service Excellence (“ASE”), which is broadly recognized for training certification in the automotive industry. Training is supplemented with frequent store visits by management.

Store managers, sales representatives, commercial specialists, and managers at various levels across the organization receive financial incentives through performance-based bonuses. In addition, our growth has provided opportunities for the promotion of qualified AutoZoners. We believe these opportunities are important to attract, motivate and retain high quality AutoZoners.

All store support functions are centralized in our store support centers located in Memphis, Tennessee; Monterrey, Mexico; Chihuahua, Mexico and Sao Paulo, Brazil. We believe that this centralization enhances consistent execution of our merchandising and marketing strategies at the store level, while reducing expenses and cost of sales.

Store Automation

All of our stores have Z-net, our proprietary electronic catalog that enables our AutoZoners to efficiently look up the parts that our customers need and to provide complete job solutions, advice and information for customer vehicles. Z-net provides parts information based on the year, make, model and engine type of a vehicle and also tracks inventory availability at the store, at other nearby stores and through special order. The Z-net display screens are placed on the hard parts counter or pods, where both the AutoZoner and customer can view the screen.

Our stores utilize our computerized proprietary Store Management System, which includes bar code scanning and point-of-sale data collection terminals. The Store Management System provides administrative assistance and improved personnel scheduling at the store level, as well as enhanced merchandising information and improved inventory control. We believe the Store Management System also enhances customer service through faster processing of transactions and simplified warranty and product return procedures. In addition, our wide area network enables the stores to expedite credit or debit card and check approval processes, to access national warranty data, to implement real-time inventory controls and to locate and hold parts at neighboring AutoZone stores.

7

Store Development

The following table reflects our store development during the past five fiscal years:

	Fiscal Year
	2013		2012		2011		2010		2009
Beginning stores		5,006		4,813		4,627		4,417		4,240
New stores		197		193		188		213		180
Closed stores		2		—		2		3		3
Net new stores		195		193		186		210		177
Relocated stores		11		10		10		3		9
Ending stores		5,201		5,006		4,813		4,627		4,417

We believe that expansion opportunities exist both in markets that we do not currently serve, as well as in markets where we can achieve a larger presence. We attempt to obtain high visibility sites in high traffic locations and undertake substantial research prior to entering new markets. The most important criteria for opening a new store are the projected future profitability and the ability to achieve our required investment hurdle rate. Key factors in selecting new site and market locations include population, demographics, vehicle profile, customer buying trends, commercial businesses, number and strength of competitors’ stores and the cost of real estate. In reviewing the vehicle profile, we also consider the number of vehicles that are seven years old and older, or “our kind of vehicles”; these vehicles are generally no longer under the original manufacturers’ warranties and require more maintenance and repair than newer vehicles. We generally seek to open new stores within or contiguous to existing market areas and attempt to cluster development in markets in a relatively short period of time. In addition to continuing to lease or develop our own stores, we evaluate and may make strategic acquisitions.

Purchasing and Supply Chain

Merchandise is selected and purchased for all stores through our store support centers located in Memphis, Tennessee and Monterrey, Mexico. In fiscal 2013, one class of similar products accounted for approximately 10 percent of our total sales. No vendor supplied more than 10 percent of our purchases, and we believe that alternative sources of supply exist, at similar costs, for most types of product sold. Most of our merchandise flows through our distribution centers to our stores by our fleet of tractors and trailers or by third-party trucking firms.

Our hub stores have increased our ability to distribute products on a timely basis to many of our stores and to expand our product assortment. A hub store generally has a larger assortment of products as well as regular replenishment items that can be delivered to a store in its network within 24 hours. Hub stores are generally replenished from distribution centers multiple times per week.

Competition

The sale of automotive parts, accessories and maintenance items is highly competitive in many areas, including name recognition, product availability, customer service, store location and price. AutoZone competes in the after-market auto parts industry, which includes both the retail DIY and commercial do-it-for-me (“DIFM”) auto parts and products markets.

Competitors include national, regional and local auto parts chains, independently owned parts stores, online parts stores, jobbers, repair shops, car washes and auto dealers, in addition to discount and mass merchandise stores, department stores, hardware stores, supermarkets, drugstores, convenience stores, home stores, and other online retailers that sell aftermarket vehicle parts and supplies, chemicals, accessories, tools and maintenance parts. AutoZone competes on the basis of customer service, including the trustworthy advice of our AutoZoners; merchandise quality, selection and availability; price; product warranty; store layouts, location and convenience; and the strength of our AutoZone brand name, trademarks and service marks.

8

Trademarks and Patents

We have registered several service marks and trademarks in the United States Patent and Trademark office as well as in certain other countries, including our service marks, “AutoZone” and “Get in the Zone,” and trademarks, “AutoZone,” “Duralast,” “Duralast Gold,” “Duralast Platinum,” “Valucraft,” “Econocraft,” “ALLDATA,” “AutoAnything,” “Loan-A-Tool” and “Z-net.” We believe that these service marks and trademarks are important components of our marketing and merchandising strategies.

Employees

As of August 31, 2013, we employed over 71,000 persons, approximately 59 percent of whom were employed full-time. About 92 percent of our AutoZoners were employed in stores or in direct field supervision, approximately 5 percent in distribution centers and approximately 3 percent in store support and other functions. Included in the above numbers are approximately 5,000 persons employed in our Mexico and Brazil operations.

We have never experienced any material labor disruption and believe that relations with our AutoZoners are good.

AutoZone Websites

AutoZone’s primary website is at http://www.autozone.com. We make available, free of charge, at our investor relations website, http://www.autozoneinc.com, our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, proxy statements, registration statements and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities and Exchange Act of 1934, as amended, as soon as reasonably feasible after we electronically file such material with, or furnish it to, the Securities and Exchange Commission.

Executive Officers of the Registrant

The following list describes our executive officers. The title of each executive officer includes the words “Customer Satisfaction” which reflects our commitment to customer service. Officers are elected by and serve at the discretion of the Board of Directors.

William C. Rhodes, III, 48—Chairman, President and Chief Executive Officer, Customer Satisfaction

William C. Rhodes, III, was named Chairman of AutoZone during fiscal 2007 and has been President, Chief Executive Officer and a director since March 2005. Prior to his appointment as President and Chief Executive Officer, Mr. Rhodes was Executive Vice President – Store Operations and Commercial. Previously, he held several key management positions with the Company. Prior to 1994, Mr. Rhodes was a manager with Ernst & Young LLP. Mr. Rhodes is a member of the Board of Directors for Dollar General Corporation.

William T. Giles, 54—Chief Financial Officer and Executive Vice President – Finance, Information Technology and ALLDATA, Customer Satisfaction

William T. Giles was named Chief Financial Officer and Executive Vice President – Finance, Information Technology and ALLDATA during October 2012. Prior to that, he was Chief Financial Officer and Executive Vice President – Finance, Information Technology and Store Development from fiscal 2007 to October 2012; Executive Vice President, Chief Financial Officer and Treasurer from June 2006 to December 2006; and Executive Vice President, Chief Financial Officer since May 2006. From 1991 to May 2006, he held several positions with Linens N’ Things, Inc., most recently as the Executive Vice President and Chief Financial Officer. Prior to 1991, he was with Melville, Inc. and PricewaterhouseCoopers. Mr. Giles is a member of the Board of Directors for Brinker International.

Harry L. Goldsmith, 62—Executive Vice President, General Counsel and Secretary, Customer Satisfaction

Harry L. Goldsmith was elected Executive Vice President, General Counsel and Secretary during fiscal 2006. Previously, he was Senior Vice President, General Counsel and Secretary since 1996 and was Vice President, General Counsel and Secretary from 1993 to 1996. In June 2013, Mr. Goldsmith announced his plans to retire, effective January 2014.

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Mark A. Finestone, 52—Senior Vice President – Merchandising, Customer Satisfaction

Mark A. Finestone was elected Senior Vice President – Merchandising during fiscal 2008. Previously, he was Vice President – Merchandising since 2002. Prior to joining AutoZone in 2002, Mr. Finestone worked for May Department Stores for 19 years where he held a variety of leadership roles which included Divisional Vice President, Merchandising.

William W. Graves, 53—Senior Vice President – Supply Chain and International, Customer Satisfaction

William W. Graves was named Senior Vice President – Supply Chain and International during October 2012. Prior thereto, he was Senior Vice President – Supply Chain from fiscal 2006 to October 2012 and Vice President – Supply Chain from fiscal 2000 to fiscal 2006. From 1992 to 2000, Mr. Graves served in various capacities with the Company.

Ronald B. Griffin, 59—Senior Vice President and Chief Information Officer, Customer Satisfaction

Ronald B. Griffin was elected Senior Vice President and Chief Information Officer during June 2012. Prior to that, he was Senior Vice President, Global Information Technology at Hewlett-Packard Company. During his tenure at Hewlett-Packard Company, he also served as the Chief Information Officer for the Enterprise Business Division. Prior to that, Mr. Griffin was Executive Vice President and Chief Information Officer for Fleming Companies, Inc. He also spent over 12 years with The Home Depot, Inc., with the last eight years in the role of Chief Information Officer. Mr. Griffin also served at Deloitte & Touche LLP and Delta Air Lines, Inc.

Albert Saltiel, 49—Senior Vice President – Marketing, Customer Satisfaction

Albert “Al” Saltiel was elected Senior Vice President – Marketing during April 2013. Prior to that, he was Chief Marketing Officer and a key member of the leadership team at Navistar International Corporation. Mr. Saltiel has also been with Sony Electronics as General Manager, Marketing, and Ford Motor Company where he held multiple marketing roles.

Thomas B. Newbern, 51—Senior Vice President – Store Operations and Store Development, Customer Satisfaction

Thomas B. Newbern was elected Senior Vice President – Store Operation and Store Development during October 2012. Previously, Mr. Newbern held the titles Senior Vice President – Store Operations from fiscal 2007 to October 2012 and Vice President – Store Operations from fiscal 1998 to fiscal 2007. Previously, he has held several key management positions with the Company.

Charlie Pleas, III, 48—Senior Vice President and Controller, Customer Satisfaction

Charlie Pleas, III, was elected Senior Vice President and Controller during fiscal 2007. Prior to that, he was Vice President and Controller since 2003. Previously, he was Vice President – Accounting since 2000, and Director of General Accounting since 1996. Prior to joining AutoZone, Mr. Pleas was a Division Controller with Fleming Companies, Inc. where he served in various capacities since 1988.

Larry M. Roesel, 56—Senior Vice President – Commercial, Customer Satisfaction

Larry M. Roesel was elected Senior Vice President – Commercial during fiscal 2007. Mr. Roesel came to AutoZone with more than thirty years of experience with OfficeMax, Inc. and its predecessor, where he served in operations, sales and general management.

Michael A. Womack, 46—Senior Vice President – Human Resources, Customer Satisfaction

Michael A. Womack was elected Senior Vice President – Human Resources in June 2012. He was previously Vice President of Human Resources with Cintas Corp. and had been with Cintas since 2003. Before joining Cintas, he was a law partner with the Littler Mendelson law firm.

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Item 1A. Risk Factors

Our business is subject to a variety of risks. Set forth below are certain of the important risks that we face, the occurrence of which could have a material, adverse effect on our business. These risks are not the only ones we face. Our business could also be affected by additional factors that are presently unknown to us or that we currently believe to be immaterial to our business.

If demand for our products slows, then our business may be materially affected.

Demand for products sold by our stores depends on many factors, including:

• the number of vehicles in current service, including those that are seven years old and older. These vehicles are generally no longer under the original vehicle manufacturers’ warranties and tend to need more maintenance and repair than newer vehicles.

• rising energy prices. Increases in energy prices may cause our customers to defer purchases of certain of our products as they use a higher percentage of their income to pay for gasoline and other energy costs.

• the economy. In periods of declining economic conditions, both retail and commercial customers may defer vehicle maintenance or repair. Additionally, such conditions may affect our customers’ ability to obtain credit. During periods of expansionary economic conditions, more of our DIY customers may pay others to repair and maintain their cars instead of working on their own vehicles or they may purchase new vehicles.

• the weather. Mild weather conditions may lower the failure rates of automotive parts, while wet conditions may cause our customers to defer maintenance and repair on their vehicles. Extremely hot or cold conditions may enhance demand for our products due to increased failure rates of our customers’ automotive parts.

• technological advances. Advances in automotive technology and parts design could result in cars needing maintenance less frequently and parts lasting longer.

For the long term, demand for our products may be affected by:

• the number of miles vehicles are driven annually. Higher vehicle mileage increases the need for maintenance and repair. Mileage levels may be affected by gas prices and other factors.

• the quality of the vehicles manufactured by the original vehicle manufacturers and the length of the warranties or maintenance offered on new vehicles.

• restrictions on access to diagnostic tools and repair information imposed by the original vehicle manufacturers or by governmental regulation.

All of these factors could result in immediate and longer term declines in the demand for our products, which could adversely affect our sales, cash flows and overall financial condition.

If we are unable to compete successfully against other businesses that sell the products that we sell, we could lose customers and our sales and profits may decline.

The sale of automotive parts, accessories and maintenance items is highly competitive and is based on many factors, including name recognition, product availability, customer service, store location and price. Competitors are opening locations near our existing stores. AutoZone competes as a provider in both the DIY and DIFM auto parts and accessories markets.

Competitors include national, regional and local auto parts chains, independently owned parts stores, online parts stores, jobbers, repair shops, car washes and auto dealers, in addition to discount and mass merchandise stores, hardware stores, supermarkets, drugstores, convenience stores, home stores, and other online retailers that sell aftermarket vehicle parts and supplies, chemicals, accessories, tools and maintenance parts. Although we believe we compete effectively on the basis of customer service, including the knowledge and expertise of our AutoZoners; merchandise quality, selection and availability; product warranty; store layout, location and convenience; price; and the strength of our AutoZone brand name, trademarks and service marks; some competitors may gain competitive advantages, such as greater financial and marketing resources allowing them to sell automotive products at lower prices, larger stores with more merchandise, longer operating histories, more

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frequent customer visits and more effective advertising. If we are unable to continue to develop successful competitive strategies, or if our competitors develop more effective strategies, we could lose customers and our sales and profits may decline.

We may not be able to sustain our historic rate of sales growth.

We have increased our store count in the past five fiscal years, growing from 4,240 stores at August 30, 2008, to 5,201 stores at August 31, 2013, an average store count increase per year of 5%. Additionally, we have increased annual revenues in the past five fiscal years from $6.523 billion in fiscal 2008 to $9.148 billion in fiscal 2013, an average increase per year of 8%. Annual revenue growth is driven by the opening of new stores and increases in same-store sales. We open new stores only after evaluating customer buying trends and market demand/needs, all of which could be adversely affected by continued job losses, wage cuts, small business failures and microeconomic conditions unique to the automotive industry. Same store sales are impacted both by customer demand levels and by the prices we are able to charge for our products, which can also be negatively impacted by continued recessionary pressures. We cannot provide any assurance that we will continue to open stores at historical rates or continue to achieve increases in same-store sales.

If we cannot profitably increase our market share in the commercial auto parts business, our sales growth may be limited.

Although we are one of the largest sellers of auto parts in the commercial market, to increase commercial sales we must compete against national and regional auto parts chains, independently owned parts stores, wholesalers and jobbers and auto dealers. Although we believe we compete effectively on the basis of customer service, merchandise quality, selection and availability, price, product warranty, distribution locations, and the strength of our AutoZone brand name, trademarks and service marks, some automotive aftermarket jobbers have been in business for substantially longer periods of time than we have, have developed long-term customer relationships and have large available inventories. If we are unable to profitably develop new commercial customers, our sales growth may be limited.

Significant changes in macroeconomic factors could adversely affect our financial condition and results of operations.

Our short-term and long-term debt is rated investment grade by the major rating agencies. These investment-grade credit ratings have historically allowed us to take advantage of lower interest rates and other favorable terms on our short-term credit lines, in our senior debt offerings and in the commercial paper markets. To maintain our investment-grade ratings, we are required to meet certain financial performance ratios. An increase in our debt and/or a decline in our earnings could result in downgrades in our credit ratings. A downgrade in our credit ratings could limit our access to public debt markets, limit the institutions willing to provide credit facilities to us, result in more restrictive financial and other covenants in our public and private debt and would likely significantly increase our overall borrowing costs and adversely affect our earnings.

Moreover, significant deterioration in the financial condition of large financial institutions in calendar years 2008 and 2009 resulted in a severe loss of liquidity and availability of credit in global credit markets and in more stringent borrowing terms. During brief time intervals in the fourth quarter of calendar 2008 and the first quarter of calendar 2009, there was limited liquidity in the commercial paper markets, resulting in an absence of commercial paper buyers and extraordinarily high interest rates on commercial paper. We can provide no assurance that credit market events such as those that occurred in the fourth quarter of 2008 and the first quarter of 2009 will not occur again in the foreseeable future. Conditions and events in the global credit market could have a material adverse effect on our access to short-term debt and the terms and cost of that debt.

Macroeconomic conditions also impact both our customers and our suppliers. Job growth in the United States has stagnated and unemployment has remained at historically high levels during the past five years. If the United States government is unable to reach agreement on legislation addressing the United States’ current debt level and budget deficit, many economists have predicted another economic recession. Continued recessionary conditions could result in additional job losses and business failures, which could result in our loss of certain small business customers and curtailment of spending by our retail customers. In addition, continued distress in global credit markets, business failures and other recessionary conditions could have a material adverse effect on the ability of

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our suppliers to obtain necessary short and long-term financing to meet our inventory demands. Moreover, rising energy prices could impact our merchandise distribution, commercial delivery, utility and product costs. All of these macroeconomic conditions could adversely affect our sales growth, margins and overhead, which could adversely affect our financial condition and operations.

Our business depends upon hiring and retaining qualified employees.

We believe that much of our brand value lies in the quality of the more than 71,000 AutoZoners employed in our stores, distribution centers, store support centers, ALLDATA and AutoAnything. We cannot be assured that we can continue to hire and retain qualified employees at current wage rates. If we are unable to hire, properly train and/or retain qualified employees, we could experience higher employment costs, reduced sales, losses of customers and diminution of our brand, which could adversely affect our earnings. If we do not maintain competitive wages, our customer service could suffer due to a declining quality of our workforce or, alternatively, our earnings could decrease if we increase our wage rates.

Inability to acquire and provide quality merchandise could adversely affect our sales and results of operations.

We are dependent upon our vendors continuing to supply us with quality merchandise. If our merchandise offerings do not meet our customers’ expectations regarding quality and safety, we could experience lost sales, increased costs and exposure to legal and reputational risk. All of our vendors must comply with applicable product safety laws, and we are dependent on them to ensure that the products we buy comply with all safety and quality standards. Events that give rise to actual, potential or perceived product safety concerns could expose us to government enforcement action or private litigation and result in costly product recalls and other liabilities. To the extent our suppliers are subject to added government regulation of their product design and/or manufacturing processes, the cost of the merchandise we purchase may rise. In addition, negative customer perceptions regarding the safety or quality of the products we sell could cause our customers to seek alternative sources for their needs, resulting in lost sales. In those circumstances, it may be difficult and costly for us to regain the confidence of our customers. Moreover, if any of our significant vendors experience financial difficulties or otherwise are unable to deliver merchandise to us on a timely basis, or at all, we could have product shortages in our stores that could adversely affect customers’ perceptions of us and cause us to lose customers and sales.

Our ability to grow depends in part on new store openings, existing store remodels and expansions and effective utilization of our existing supply chain and hub network.

Our continued growth and success will depend in part on our ability to open and operate new stores and expand and remodel existing stores to meet customers’ needs on a timely and profitable basis. Accomplishing our new and existing store expansion goals will depend upon a number of factors, including the ability to partner with developers and landlords to obtain suitable sites for new and expanded stores at acceptable costs, the hiring and training of qualified personnel, particularly at the store management level, and the integration of new stores into existing operations. There can be no assurance we will be able to achieve our store expansion goals, manage our growth effectively, successfully integrate the planned new stores into our operations or operate our new, remodeled and expanded stores profitably.

In addition, we extensively utilize hub stores, our supply chain and logistics management techniques to efficiently stock our stores. If we fail to effectively utilize our existing hubs and/or supply chains, we could experience inappropriate inventory levels in our stores, which could adversely affect our sales volume and/or our margins.

Our failure to protect our reputation could have a material adverse effect on our brand name.

We believe our continued strong sales growth is driven in significant part by our brand name. The value in our brand name and its continued effectiveness in driving our sales growth are dependent to a significant degree on our ability to maintain our reputation for safety, high product quality, friendliness, service, trustworthy advice, integrity and business ethics. Any negative publicity about these types of concerns may reduce demand for our merchandise. Failure to comply with ethical, social, product, labor and environmental standards could also jeopardize our reputation and potentially lead to various adverse consumer actions. Failure to comply with applicable laws and regulations, to maintain an effective system of internal controls or to provide accurate and timely financial statement information could also hurt our reputation.

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Our business involves the storage of personal information about our customers and AutoZoners. Failure to protect the security of our customers’, employees’ and company information could subject us to costly regulatory enforcement actions, expose us to litigation and our reputation could suffer. While we take significant steps to protect customer, employee and other confidential information, including maintaining compliance with payment card industry standards, our security measures may be breached in the future due to cyber attack, employee error or other acts, and unauthorized parties may obtain access to this data. To date, we have not experienced any significant breaches of information.

Damage to our reputation or loss of consumer confidence for any of these or other reasons could have a material adverse effect on our results of operations and financial condition, as well as require additional resources to rebuild our reputation.

Business interruptions may negatively impact our store hours, operability of our computer and other systems, availability of merchandise and otherwise have a material negative effect on our sales and our business.

War or acts of terrorism, political unrest, hurricanes, windstorms, fires, earthquakes and other natural or other disasters or the threat of any of them, may result in certain of our stores being closed for a period of time or permanently or have a negative impact on our ability to obtain merchandise available for sale in our stores. Some of our merchandise is imported from other countries. If imported goods become difficult or impossible to bring into the United States, and if we cannot obtain such merchandise from other sources at similar costs, our sales and profit margins may be negatively affected.

In the event that commercial transportation is curtailed or substantially delayed, our business may be adversely impacted, as we may have difficulty shipping merchandise to our distribution centers and stores resulting in lost sales and/or a potential loss of customer loyalty. Transportation issues could also cause us to cancel purchase orders if we are unable to receive merchandise in our distribution centers.

We rely extensively on our computer systems to manage inventory, process transactions and summarize results. Our systems are subject to damage or interruption from power outages, telecommunications failures, computer viruses, security breaches and catastrophic events. If our systems are damaged or fail to function properly, we may incur substantial costs to repair or replace them, and may experience loss of critical data and interruptions or delays in our ability to manage inventories or process transactions, which could result in lost sales, inability to process purchase orders and/or a potential loss of customer loyalty, which could adversely affect our results of operations.

Item 1B. Unresolved Staff Comments

None.

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Item 2. Properties

The following table reflects the square footage and number of leased and owned properties for our stores as of August 31, 2013:

	No. of Stores		Square Footage
Leased		2,653		16,930,389
Owned		2,548		17,145,139
Total		5,201		34,075,528

We have approximately 4.0 million square feet in distribution centers servicing our stores, of which approximately 1.3 million square feet is leased and the remainder is owned. Our distribution centers are located in Arizona, California, Georgia, Illinois, Ohio, Pennsylvania, Tennessee, Texas, and Mexico. Our primary store support center is located in Memphis, Tennessee, and consists of approximately 260,000 square feet. We also have three additional store support centers located in Monterrey, Mexico; Chihuahua, Mexico and Sao Paulo, Brazil. The ALLDATA headquarters building in Elk Grove, California, and the AutoAnything headquarters space in San Diego, California are leased, and we also own or lease other properties that are not material in the aggregate.

Item 3. 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 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 have contested any such 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 4. Mine Safety Disclosures

Not applicable.

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PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

Our common stock is listed on the New York Stock Exchange under the symbol “AZO.” On October 21, 2013, there were 2,778 stockholders of record, which does not include the number of beneficial owners whose shares were represented by security position listings.

We currently do not pay a dividend on our common stock. Our ability to pay dividends is subject to limitations imposed by Nevada law. Any future payment of dividends would be dependent upon our financial condition, capital requirements, earnings and cash flow.

The following table sets forth the high and low sales prices per share of common stock, as reported by the New York Stock Exchange, for the periods indicated:

	Price Range of Common Stock
	High		Low
Fiscal Year Ended August 31, 2013:
Fourth quarter	$	452.19	$	401.93
Third quarter	$	413.28	$	369.47
Second quarter	$	390.11	$	341.98
First quarter	$	386.80	$	351.27
Fiscal Year Ended August 25, 2012:
Fourth quarter	$	391.90	$	353.38
Third quarter	$	399.10	$	353.80
Second quarter	$	356.80	$	313.11
First quarter	$	341.89	$	303.00

During 1998, the Company announced a program permitting the Company to repurchase a portion of its outstanding shares not to exceed a dollar maximum established by the Company’s Board of Directors. The program was most recently amended on June 11, 2013, to increase the repurchase authorization by $750 million to raise the cumulative share repurchase authorization from $12.65 billion to $13.40 billion.

Shares of common stock repurchased by the Company during the quarter ended August 31, 2013, were as follows:

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
May 5, 2013, to June 1, 2013		23,900	$	417.00		23,900	$	268,442,619
June 2, 2013, to June 29, 2013		397,712		415.79		397,712		853,076,687
June 30, 2013, to July 27, 2013		400,901		431.55		400,901		680,067,382
July 28, 2013, to August 31, 2013		487,000		434.55		487,000		468,441,939
Total		1,309,513	$	427.61		1,309,513	$	468,441,939

The Company also repurchased, at fair value, an additional 22,915 shares in fiscal 2013, 24,113 shares in fiscal 2012, and 30,864 shares in fiscal 2011 from employees electing to sell their stock under the Company’s Sixth Amended and Restated Employee Stock Purchase Plan (the “Employee Plan”), qualified under Section 423 of the Internal Revenue Code, under which all eligible employees may purchase AutoZone’s common stock at 85% of the lower of the market price of the common stock on the first day or last day of each calendar quarter through payroll deductions. Maximum permitted annual purchases are $15,000 per employee or 10 percent of compensation, whichever is less. Under the Employee Plan, 18,228 shares were sold to employees in fiscal 2013, 19,403 shares were sold to employees in fiscal 2012, and 21,608 shares were sold to employees in fiscal 2011. At August 31, 2013, 234,744 shares of common stock were reserved for future issuance under the Employee Plan.

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Once executives have reached the maximum purchases under the Employee Plan, the Fifth Amended and Restated Executive Stock Purchase Plan (the “Executive Plan”) permits all eligible executives to purchase AutoZone’s common stock up to 25 percent of his or her annual salary and bonus. Purchases by executives under the Executive Plan were 3,454 shares in fiscal 2013, 3,937 shares in fiscal 2012, and 1,719 shares in fiscal 2011. At August 31, 2013, 248,953 shares of common stock were reserved for future issuance under the Executive Plan.

Stock Performance Graph

The graph below presents changes in the value of AutoZone’s stock as compared to Standard & Poor’s 500 Composite Index (“S&P 500”) and to Standard & Poor’s Retail Index (“S&P Retail Index”) for the five-year period beginning August 30, 2008 and ending August 31, 2013.

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Item 6. Selected Financial Data

(in thousands, except per share data, same store sales and selected operating data)	Fiscal Year Ended August
	2013 (1)			2012			2011			2010			2009
Income Statement Data
Net sales	$	9,147,530		$	8,603,863		$	8,072,973		$	7,362,618		$	6,816,824
Cost of sales, including warehouse and delivery expenses		4,406,595			4,171,827			3,953,510			3,650,874			3,400,375
Gross profit		4,740,935			4,432,036			4,119,463			3,711,744			3,416,449
Operating, selling, general and administrative expenses		2,967,837			2,803,145			2,624,660			2,392,330			2,240,387
Operating profit		1,773,098			1,628,891			1,494,803			1,319,414			1,176,062
Interest expense, net		185,415			175,905			170,557			158,909			142,316
Income before income taxes		1,587,683			1,452,986			1,324,246			1,160,505			1,033,746
Income tax expense		571,203			522,613			475,272			422,194			376,697
Net income	$	1,016,480		$	930,373		$	848,974		$	738,311		$	657,049
Diluted earnings per share	$	27.79		$	23.48		$	19.47		$	14.97		$	11.73
Adjusted weighted average shares for diluted earnings per share		36,581			39,625			43,603			49,304			55,992
Same Store Sales
Increase in domestic comparable store net sales (2)		0.0	%		3.9	%		6.4	%		5.4	%		4.4	%
Balance Sheet Data
Current assets	$	3,278,013		$	2,978,946		$	2,792,425		$	2,611,821		$	2,561,730
Working (deficit)		(891,137	)		(676,646	)		(638,471	)		(452,139	)		(145,022	)
Total assets		6,892,089			6,265,639			5,869,602			5,571,594			5,318,405
Current liabilities		4,169,150			3,655,592			3,430,896			3,063,960			2,706,752
Debt		4,187,000			3,768,183			3,351,682			2,908,486			2,726,900
Long-term capital leases		73,925			72,414			61,360			66,333			38,029
Stockholders’ (deficit)		(1,687,319	)		(1,548,025	)		(1,254,232	)		(738,765	)		(433,074	)
Selected Operating Data
Number of stores at beginning of year		5,006			4,813			4,627			4,417			4,240
New stores		197			193			188			213			180
Closed stores		2			—			2			3			3
Net new stores		195			193			186			210			177
Relocated stores		11			10			10			3			9
Number of stores at end of year		5,201			5,006			4,813			4,627			4,417
Domestic commercial programs		3,421			3,053			2,659			2,424			2,303
Total store square footage (in thousands)		34,076			32,706			31,337			30,027			28,550
Average square footage per store		6,552			6,533			6,511			6,490			6,464
Increase in store square footage		4.2	%		4.4	%		4.4	%		5.2	%		4.6	%
Inventory per store (in thousands)	$	550		$	525		$	512		$	498		$	500
Average net sales per store (in thousands)	$	1,736		$	1,716		$	1,675		$	1,595		$	1,541
Net sales per store square foot	$	265		$	263		$	258		$	246		$	239
Total employees at end of year (in thousands)		71			70			65			63			60
Inventory turnover (3)		1.6x			1.6x			1.6x			1.6x			1.5x
Accounts payable to inventory ratio		115.6	%		111.4	%		111.7	%		105.6	%		96.0	%
After-tax return on invested capital (4)		32.7	%		33.0	%		31.3	%		27.6	%		24.4	%
Adjusted debt to EBITDAR (5)		2.5			2.5			2.4			2.4			2.5
Net cash provided by operating activities (in thousands)	$	1,415,011		$	1,223,981		$	1,291,538		$	1,196,252		$	923,808
Cash flow before share repurchases and changes in debt (in thousands) (6)	$	1,007,761		$	949,627		$	1,023,927		$	947,643		$	673,347
Share repurchases (in thousands)	$	1,387,315		$	1,362,869		$	1,466,802		$	1,123,655		$	1,300,002
Number of shares repurchased (in thousands)		3,511			3,795			5,598			6,376			9,313

(1) The fiscal year ended August 31, 2013 consisted of 53 weeks.

(2) The domestic comparable sales increases are based on sales for all domestic stores open at least one year. Relocated stores are included in the same store sales computation based on the year the original store was opened. Closed store sales are included in the same store sales computation up to the week it closes, and excluded from the computation for all periods subsequent to closing. In addition, beginning in fiscal 2013, it also includes all sales through our AutoZone branded websites, including consumer direct ship-to-home sales. All prior period same store sales have been restated to be comparable. The effect of including sales from AutoZone branded websites was not material to any period.

(3) Inventory turnover is calculated as cost of sales divided by the average merchandise inventory balance over the trailing 5 quarters.

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(4) After-tax return on invested capital is defined as after-tax operating profit (excluding rent charges) divided by average invested capital (which includes a factor to capitalize operating leases). See Reconciliation of Non-GAAP Financial Measures in Management’s Discussion and Analysis of Financial Condition and Results of Operations.

(5) Adjusted debt to EBITDAR is defined as the sum of total debt, capital lease obligations and annual rents times six; divided by net income plus interest, taxes, depreciation, amortization, rent and share-based compensation expense. See Reconciliation of Non-GAAP Financial Measures in Management’s Discussion and Analysis of Financial Condition and Results of Operations.

(6) Cash flow before share repurchases and changes in debt is defined as the change in cash and cash equivalents less the change in debt plus treasury stock purchases. See Reconciliation of Non-GAAP Financial Measures in Management’s Discussion and Analysis of Financial Condition and Results of Operations.

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations

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 August 31, 2013, operated 4,836 stores in the United States, including Puerto Rico; 362 in Mexico; and three 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 August 31, 2013, in 3,421 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 also have commercial programs in select stores in Mexico, as well as in our stores in Brazil. We also sell the ALLDATA brand automotive diagnostic and repair software through www.alldata.com. Additionally, we sell automotive hard parts, maintenance items, accessories, and non-automotive products through www.autozone.com, and accessories and performance parts through 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.

Executive Summary

We achieved strong performance in fiscal 2013, delivering record net income of $1.016 billion, a 9.3% increase over the prior year, and sales growth of $543.7 million, a 6.3% increase over the prior year. We completed the year with growth in all areas of our business. We are pleased with the results of our retail business and the increase in our commercial business, where we continue to build our internal sales force and continue to refine our parts assortment. Over the past several years, various factors have occurred within the economy that affect both our customers 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 the previously listed 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 affected both our customers and our industry. During fiscal 2013, the average price per gallon of unleaded gasoline in the United States remained at a high level, $3.65 per gallon, compared to $3.57 per gallon during fiscal 2012. We continue to believe gas prices will remain at overall high levels, thereby reducing discretionary spending for all consumers, and, in particular, our customers. With approximately 11 billion gallons of unleaded gas consumed each month across the U.S., each $1 decrease at the pump contributes approximately $11 billion of additional spending capacity to consumers each month. 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.

An additional macroeconomic factor facing our customer is the reinstitution of payroll taxes back to historic levels. 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 has had or will have on our sales in future periods.

During 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

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we have not experienced any fundamental shifts in our category sales mix as compared to previous years, we did experience a slight decline in sales of the maintenance category as a percentage of sales. We believe the slowdown in maintenance related products during fiscal 2013 was largely due to weather related impacts in various regions. Because of the unusually mild winter during fiscal 2012 across parts of the U.S., we saw a reduced benefit from sales of maintenance related products in fiscal 2013 compared to the prior fiscal year. However, sales in the maintenance category did improve in the last quarter of fiscal 2013 due to a more normalized winter in fiscal 2013 as compared to fiscal 2012.

Our primary response to fluctuations in the demand for the products we sell is to adjust our advertising message, store staffing, and product assortment. Specifically, during fiscal 2013, we have closely studied our hub distribution model and store inventory levels and assortment. As a result, we are performing certain strategic tests including adding additional inventory into our hub stores and increasing product availability in our stores. We continue to believe we are well positioned to help our customers save money and meet their needs in a challenging macroeconomic environment.

The two statistics we believe have the closest correlation to our market growth over the long-term are miles driven and the number of seven year old or older vehicles on the road.

Miles Driven

We believe that as the number of miles driven increases, consumers’ vehicles are more likely to need service and maintenance, resulting in an increase in the need for automotive hard parts and maintenance items. While over the long-term, we have seen a close correlation between our net sales and the number of miles driven, we have also seen certain time frames of minimal correlation in sales performance and miles driven. During the periods of minimal correlation between net sales and miles driven, we believe net sales have been positively impacted by other factors, including the number of seven year old or older vehicles on the road. Since the beginning of the fiscal year and through June 2013 (latest publicly available information), miles driven decreased slightly compared to the same period last year.

Seven Year Old or Older Vehicles

Since 2008, new vehicle sales have been significantly lower than historical levels, which we believe contributed to an increasing number of seven year old or older vehicles on the road. We estimate vehicles are driven an average of approximately 12,500 miles each year. In seven years, the average miles driven equates to approximately 87,500 miles. Our experience is that at this point in a vehicle’s life, most vehicles are not covered by warranties and increased maintenance is needed to keep the vehicle operating. According to the latest data provided by the Automotive Aftermarket Industry Association, as of January 1, 2013, the average age of vehicles on the road is 11.3 years as compared to 11.1 years as of January 1, 2012. Although the average age of vehicles continues to increase, it is increasing at a decelerated rate primarily driven by the improvement in new car sales in recent years. However, in the near term, we expect the aging vehicle population to continue to increase, as consumers keep their cars longer in an effort to save money during this uncertain economy. As the number of seven year old or older vehicles on the road increases, we expect an increase in demand for the products we sell.

Results of Operations

Fiscal 2013 Compared with Fiscal 2012

For the fiscal year ended August 31, 2013, we reported net sales of $9.148 billion compared with $8.604 billion for the year ended August 25, 2012, a 6.3% increase from fiscal 2012. This growth was driven primarily by sales from new stores of $222.3 million, the 53^rd week sales of $177.7 million, and sales from AutoAnything for a portion of the fiscal year.

At August 31, 2013, we operated 4,836 domestic stores, 362 stores in Mexico and three stores in Brazil, compared with 4,685 domestic stores, 321 stores in Mexico and none in Brazil at August 25, 2012. We reported a total auto parts (domestic, Mexico and Brazil) sales increase of 5.2% for fiscal 2013.

Gross profit for fiscal 2013 was $4.741 billion, or 51.8% of net sales, compared with $4.432 billion, or 51.5% of net sales for fiscal 2012. The improvement in gross margin was primarily driven by lower product acquisition costs, partially offset by the inclusion of AutoAnything (28 basis points).

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Operating, selling, general and administrative expenses for fiscal 2013 increased to $2.968 billion, or 32.4% of net sales, from $2.803 billion, or 32.6% of net sales for fiscal 2012. Operating expenses, as a percentage of sales, improved due to lower incentive compensation (19 basis points), partially offset by lower sales growth rates.

Interest expense, net for fiscal 2013 was $185.4 million compared with $175.9 million during fiscal 2012. This increase was primarily due to higher average borrowing levels over the comparable prior year period; partially offset by a decline in borrowing rates. Average borrowings for fiscal 2013 were $3.927 billion, compared with $3.507 billion for fiscal 2012 and weighted average borrowing rates were 4.5% for fiscal 2013, compared to 4.7% for fiscal 2012.

Our effective income tax rate was 36.0% of pre-tax income for fiscal 2013 compared to 36.0% for fiscal 2012.

Net income for fiscal 2013 increased by 9.3% to $1.016 billion, and diluted earnings per share increased 18.3% to $27.79 from $23.48 in fiscal 2012. The impact of the fiscal 2013 stock repurchases on diluted earnings per share in fiscal 2013 was an increase of approximately $1.09.

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, up to a $5 million holdback payment for working capital true-ups, and contingent payments not to exceed $30 million. During the third quarter of fiscal 2013, we paid the holdback payment for working capital true-ups of $1.1 million. With this acquisition, we expect to bolster our online presence in the 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 $83.4 million and intangible assets totaling $58.7 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.

We performed our annual impairment testing in the fourth quarter of fiscal 2013 for the goodwill and indefinite-lived intangible asset related to the acquisition of AutoAnything. Based on an analysis of AutoAnything’s revised planned financial results compared to the initial projections, we determined it was more likely than not the goodwill attributed to AutoAnything was impaired. Accordingly, we performed a goodwill impairment test by comparing the fair value of the reporting unit with its carrying amount, including goodwill. Because the fair value of the reporting unit was lower than its carrying value, we recorded a goodwill impairment charge of $18.3 million during the fourth quarter of fiscal 2013. Based on our evaluation of the future discounted cash flows of AutoAnything’s trade name as compared to its carrying value, it was determined that AutoAnything’s trade name was also impaired. We recorded an impairment charge of $4.1 million during the fourth quarter of fiscal 2013 related to the trade name.

Based on the revised plan financial results, we also determined AutoAnything is not likely to achieve the operating income targets necessary to earn the contingent consideration. Therefore, we adjusted the fair value of the contingent consideration at August 31, 2013 to $0.2 million, resulting in a decrease to the contingent consideration liability of $23.3 million during the fourth quarter of fiscal 2013. The net impact of the impairment charges and the contingent consideration adjustment is a gain of $0.9 million. The net impact is included in Operating, selling, general and administrative expenses in our Other business activities.

Fiscal 2012 Compared with Fiscal 2011

For the fiscal year ended August 25, 2012, we reported net sales of $8.604 billion compared with $8.073 billion for the year ended August 27, 2011, a 6.6% increase from fiscal 2011. This growth was driven primarily by an increase in domestic same store sales of 3.9% and sales from new stores of $214.2 million. The improvement in domestic same store sales was driven by higher transaction value, partially offset by decreased transaction counts.

At August 25, 2012, we operated 4,685 domestic stores and 321 stores in Mexico, compared with 4,534 domestic stores and 279 stores in Mexico at August 27, 2011. We reported a total auto parts (domestic and Mexico operations) sales increase of 6.5% for fiscal 2012.

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Gross profit for fiscal 2012 was $4.432 billion, or 51.5% of net sales, compared with $4.119 billion, or 51.0% of net sales for fiscal 2011. The improvement in gross margin was primarily attributable to higher merchandise margins (19 basis points) and lower shrink expense (17 basis points). Lower acquisition costs drove the higher merchandise margins for the year.

Operating, selling, general and administrative expenses for fiscal 2012 increased to $2.803 billion, or 32.6% of net sales, from $2.625 billion, or 32.5% of net sales for fiscal 2011. The slight increase in operating expenses, as a percentage of sales, was the result of higher self-insurance costs (42 basis points); partially offset by lower incentive compensation (30 basis points).

Interest expense, net for fiscal 2012 was $175.9 million compared with $170.6 million during fiscal 2011. This increase was primarily due to higher average borrowing levels over the comparable prior year period; partially offset by a decline in borrowing rates. Average borrowings for fiscal 2012 were $3.507 billion, compared with $3.103 billion for fiscal 2011 and weighted average borrowing rates were 4.7% for fiscal 2012, compared to 5.1% for fiscal 2011.

Our effective income tax rate was 36.0% of pre-tax income for fiscal 2012 compared to 35.9% for fiscal 2011.

Net income for fiscal 2012 increased by 9.6% to $930.4 million, and diluted earnings per share increased 20.6% to $23.48 from $19.47 in fiscal 2011. The impact of the fiscal 2012 stock repurchases on diluted earnings per share in fiscal 2012 was an increase of approximately $0.96.

Seasonality and Quarterly Periods

Our business is somewhat seasonal in nature, with the highest sales typically occurring in the spring and summer months of February through September, in which average weekly per-store sales historically have been about 15% to 25% higher than in the slower months of December and January. During short periods of time, a store’s sales can be affected by weather conditions. Extremely hot or extremely cold weather may enhance sales by causing parts to fail; thereby increasing sales of seasonal products. Mild or rainy weather tends to soften sales, as parts failure rates are lower in mild weather, with elective maintenance deferred during periods of rainy weather. Over the longer term, the effects of weather balance out, as we have stores throughout the United States, Puerto Rico, Mexico and Brazil.

Each of the first three quarters of our fiscal year consists of 12 weeks, and the fourth quarter consisted of 17 weeks in 2013 and 16 weeks in 2012 and 2011. Because the fourth quarter contains seasonally high sales volume and consists of 16 or 17 weeks, compared with 12 weeks for each of the first three quarters, our fourth quarter represents a disproportionate share of the annual net sales and net income. The fourth quarter of fiscal year 2013 represented 33.8% of annual sales and 36.5% of net income; the fourth quarter of fiscal 2012 represented 32.1% of annual sales and 34.8% of net income; and the fourth quarter of fiscal 2011 represented 32.7% of annual sales and 35.5% of net income.

Liquidity and Capital Resources

The primary source of our liquidity is our cash flows realized through the sale of automotive parts and products. Net cash provided by operating activities was $1.415 billion in fiscal 2013, $1.224 billion in fiscal 2012, and $1.292 billion in fiscal 2011. Cash flows from operations are favorable to last year due to the change in inventories net of payables and the growth in net income. We had an accounts payable to inventory ratio of 115.6% at August 31, 2013, 111.4% at August 25, 2012, and 111.7% at August 27, 2011. Our inventory increases are primarily attributable to our efforts to update product assortments in all of our stores and an increased number of stores. During fiscal 2013, we initiated a variety of strategic inventory tests focused on increasing inventory availability, which increased our inventory per store. Many of our vendors have supported our initiative to update our product assortments by providing extended payment terms. These extended payment terms have allowed us to continue our high accounts payable to inventory ratio.

Our primary capital requirement has been the funding of our continued new-store development program. From the beginning of fiscal 2011 to August 31, 2013, we have opened 578 new stores. Net cash flows used in investing activities were $527.3 million in fiscal 2013, compared to $374.8 million in fiscal 2012, and $319.0 million in

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fiscal 2011. We invested $414.5 million in capital assets in fiscal 2013, compared to $378.1 million in fiscal 2012, and $321.6 million in fiscal 2011. The increase in capital expenditures during this time was primarily attributable to the number and types of stores opened and increased investment in our existing stores. New store openings were 197 for fiscal 2013, 193 for fiscal 2012, and 188 for fiscal 2011. Cash flows used in the acquisition of AutoAnything were $116.1 million during fiscal 2013. There were no acquisitions in fiscal 2012 or fiscal 2011. We invest a portion of our assets held by our wholly owned insurance captive in marketable securities. We purchased $44.5 million of marketable securities in fiscal 2013, $45.7 million in fiscal 2012, and $43.8 million in fiscal 2011. We had proceeds from the sale of marketable securities of $37.9 million in fiscal 2013, $42.4 million in fiscal 2012, and $43.1 million in fiscal 2011. Capital asset disposals provided proceeds of $9.8 million in fiscal 2013, $6.6 million in fiscal 2012, and $3.3 million in fiscal 2011.

Net cash used in financing activities was $847.0 million in fiscal 2013, $843.4 million in fiscal 2012, and $973.8 million in fiscal 2011. The net cash used in financing activities reflected purchases of treasury stock which totaled $1.387 billion for fiscal 2013, $1.363 billion for fiscal 2012, and $1.467 billion for fiscal 2011. The treasury stock purchases in fiscal 2013, 2012 and 2011 were primarily funded by cash flows from operations, and by increases in debt levels. Proceeds from issuance of debt were $800 million for fiscal 2013, $500 million for fiscal 2012, and $500 million for fiscal 2011. In fiscal 2013 and fiscal 2012, the proceeds from the issuance of debt were used for the repayment of a portion of commercial paper borrowings and general corporate purposes, including for working capital requirements, capital expenditures, store openings and stock repurchases. Proceeds from the issuance of debt in fiscal 2013 were also used for the acquisition of AutoAnything. In fiscal 2013, we repaid our $200 million Senior Notes due in June 2013 and our $300 million Senior Notes due in October 2012 using commercial paper borrowings. There were no repayments of debt in fiscal 2012. In fiscal 2011, we used the proceeds from the issuance of debt to repay our $199.3 million Senior Notes due in November 2010, to repay a portion of our commercial paper borrowings and for general corporate purposes. In 2013, we received proceeds from the issuance of commercial paper and short-term borrowings in the amount of $118.7 million. In 2012, net payments of commercial paper and short-term borrowings were $81.3 million. In 2011, we received proceeds from the issuance of commercial paper and short-term borrowing in the amount of $141.5 million.

During fiscal 2014, we expect to invest in our business at an increased rate as compared to fiscal 2013. Our investments are expected to be directed primarily to our new-store development program and enhancements to existing stores and infrastructure. The amount of our investments in our new-store program is impacted by different factors, including such factors as whether the building and land are purchased (requiring higher investment) or leased (generally lower investment), located in the United States, Mexico or Brazil, or located in urban or rural areas. During fiscal 2013, fiscal 2012, and fiscal 2011, our capital expenditures have increased by approximately 10%, 18% and 2%, respectively, as compared to the prior year. 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 over the previous three years, and we expect this trend to continue during the fiscal year ending August 30, 2014.

In addition to the building and land costs, our new-store development program requires working capital, predominantly for inventories. Historically, we have negotiated extended payment terms from suppliers, reducing the working capital required and resulting in a high accounts payable to inventory ratio. 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 credit ratings and favorable experiences in the debt markets in the past.

Our cash balances are held in various locations around the world. Of the $142.2 million and $103.1 million of cash and cash equivalents at August 31, 2013, and August 25, 2012, respectively, $38.2 million and $7.8 million, respectively, were held outside of the U.S. and were generally utilized to support liquidity needs in our foreign operations. We intend to continue to permanently reinvest the cash held outside of the U.S. in our foreign operations.

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For the fiscal year ended August 31, 2013, our after-tax return on invested capital (“ROIC”) was 32.7% as compared to 33.0% 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). The decrease in ROIC is primarily due to the acquisition of AutoAnything. We use ROIC to evaluate whether we are effectively using our capital resources and believe it is an important indicator of our overall operating performance.

Debt Facilities

In September 2011, we amended and restated our $800 million revolving credit facility, which was scheduled to expire in July 2012. The capacity under the revolving credit facility was increased 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.

The revolving credit facility agreement requires that our consolidated interest coverage ratio as of the last day of each quarter shall be no less than 2.50:1. This ratio is defined as the ratio of (i) consolidated earnings before interest, taxes and rents to (ii) consolidated interest expense plus consolidated rents. Our consolidated interest coverage ratio as of August 31, 2013 was 4.68:1.

As of August 31, 2013, $637 million of commercial paper borrowings and $326.3 million of the 6.500% Senior Notes due January 2014 are classified as long-term in the Consolidated Balance Sheets as we have the ability and intent to refinance on a long-term basis through available capacity in our revolving credit facility. As of August 31, 2013, we had $963.3 million of availability under our $1.0 billion revolving credit facility, expiring in September 2016 that would allow us to replace these short-term obligations with long-term financing.

In addition to 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. As of August 31, 2013, we have $99.4 million in letters of credit outstanding under the letter of credit facility, which expires in June 2016.

In addition to the outstanding letters of credit issued under the committed facilities discussed above, we had $41.8 million in letters of credit outstanding as of August 31, 2013. These letters of credit have various maturity dates and were issued on an uncommitted basis.

On April 29, 2013, we issued $500 million in 3.125% Senior Notes due July 2023 under our shelf registration statement filed with the SEC on April 17, 2012 (the “Shelf Registration”). The Shelf Registration allows us to sell an indeterminate amount in debt securities to fund general corporate purposes, including repaying, redeeming or repurchasing outstanding debt and for working capital, capital expenditures, new store openings, stock repurchases and acquisitions. Proceeds from the debt issuance on April 29, 2013, were used to repay a portion of the outstanding commercial paper borrowings and for general corporate purposes. We used commercial paper borrowings to repay the $200 million in 4.375% Senior Notes due June 2013.

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

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On April 24, 2012, we issued $500 million in 3.700% Senior Notes due April 2022 under the Shelf Registration. Proceeds from the debt issuance on April 24, 2012, were used to repay a portion of the commercial paper borrowings and for general corporate purposes. On November 15, 2010, we issued $500 million in 4.000% Senior Notes due 2020 under a shelf registration statement filed with the Securities and Exchange Commission on July 29, 2008. We used the proceeds from the November 15, 2010 issuance of debt to repay the principal due relating to the 4.750% Senior Notes that matured on November 15, 2010, to repay a portion of the commercial paper borrowings and for general corporate purposes.

The 5.750% Senior Notes issued in July 2009 and the 6.500% and 7.125% Senior Notes issued during August 2008, (collectively, the “Notes”), are subject to an interest rate adjustment if the debt ratings assigned to the Notes are downgraded. The Notes, along with the 3.125% Senior Notes issued in April 2013, 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 during November 2010, also contain a provision that repayment of the notes may be accelerated if we experience a change in control (as defined in the agreements). Our borrowings under our other senior notes contain minimal covenants, primarily restrictions on liens. Under our revolving credit facility, covenants include limitations on total indebtedness, restrictions on liens, a maximum debt to earnings ratio, and a change of control provision that may require acceleration of the repayment obligations under certain circumstances. These covenants are in addition to the consolidated interest coverage ratio discussed above. 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 August 31, 2013, we were in compliance with all covenants related to our borrowing arrangements and expect to remain in compliance with those covenants in the future.

For the fiscal year ended August 31, 2013, our adjusted debt to earnings before interest, taxes, depreciation, amortization, rent and share-based compensation expense (“EBITDAR”) ratio was 2.5:1 as compared to 2.5:1 as of the comparable prior year end. 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 compensation expense to net income. 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

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 “Board”). On June 11, 2013, the Board voted to increase the authorization by $750 million to raise the cumulative share repurchase authorization from $12.65 billion to $13.40 billion. From January 1998 to August 31, 2013, we have repurchased a total of 134.6 million shares at an aggregate cost of $12.93 billion. We repurchased 3.5 million shares of common stock at an aggregate cost of $1.39 billion during fiscal 2013, 3.8 million shares of common stock at an aggregate cost of $1.36 billion during fiscal 2012, and 5.6 million shares of common stock at an aggregate cost of $1.47 billion during fiscal 2011. Considering cumulative repurchases as of August 31, 2013, we have $468.4 million remaining under the Board of Director’s authorization to repurchase our common stock.

Subsequent to August 31, 2013, we have repurchased 355,150 shares of common stock at an aggregate cost of $149.8 million.

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Financial Commitments

The following table shows our significant contractual obligations as of August 31, 2013:

(in thousands)	Total Contractual Obligations		Payment Due by Period
			Less than 1 year		Between 1-3 years		Between 3-5 years		Over 5 years
Long-term debt (1)	$	4,013,267	$	963,267	$	1,000,000	$	250,000	$	1,800,000
Interest payments (2)		786,075		155,963		228,050		161,125		240,937
Operating leases (3)		1,957,222		228,747		424,989		358,057		945,429
Capital leases (4)		109,223		32,246		55,306		21,671		—
Self-insurance reserves (5)		197,268		66,133		57,358		28,490		45,287
Construction commitments		21,027		21,027		—		—		—
	$	7,084,082	$	1,467,383	$	1,765,703	$	819,343	$	3,031,653

(1) Long-term debt balances represent principal maturities, excluding interest.

(2) Represents obligations for interest payments on long-term debt.

(3) Operating lease obligations are inclusive of amounts accrued within deferred rent and closed store obligations reflected in our consolidated balance sheets.

(4) Capital lease obligations include related interest.

(5) Self-insurance reserves reflect estimates based on actuarial calculations. Although these obligations do not have scheduled maturities, the timing of future payments are predictable based upon historical patterns. Accordingly, we reflect the net present value of these obligations in our consolidated balance sheets.

We have pension obligations reflected in our consolidated balance sheets that are not reflected in the table above due to the absence of scheduled maturities and the nature of the account. During fiscal 2013, we made contributions of $16.9 million to the pension plan. We expect to make contributions of approximately $4 million during fiscal 2014; however a change to the expected cash funding may be impacted by a change in interest rates or a change in the actual or expected return on plan assets.

As of August 31, 2013, our defined benefit obligation associated with our pension plans is $256.8 million and our pension assets are valued at $208.1 million, resulting in a net pension obligation of $48.7 million. Amounts recorded in Accumulated other comprehensive loss are $83.6 million at August 31, 2013. The balance in Accumulated other comprehensive loss will be amortized into pension expense in the future, unless the losses are recovered in future periods through actuarial gains.

Additionally, our tax liability for uncertain tax positions, including interest and penalties, was $35.4 million at August 31, 2013. Approximately $2.2 million is classified as current liabilities and $33.2 million is classified as long-term liabilities. We did not reflect these obligations in the table above as we are unable to make an estimate of the timing of payments due to uncertainties in the timing and amounts of the settlement of these tax positions.

Off-Balance Sheet Arrangements

The following table reflects outstanding letters of credit and surety bonds as of August 31, 2013:

(in thousands)	Total Other Commitments
Standby letters of credit	$	145,357
Surety bonds		30,726
	$	176,083

A substantial portion of the outstanding standby letters of credit (which are primarily renewed on an annual basis) and surety bonds are used to cover reimbursement obligations to our workers’ compensation carriers. There are no additional contingent liabilities associated with these instruments as the underlying liabilities are already reflected in our consolidated balance sheets. The standby letters of credit and surety bond arrangements expire within one year, but have automatic renewal clauses.

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Reconciliation of Non-GAAP Financial Measures

“Selected Financial Data” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” include certain financial measures not derived in accordance with 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 as it indicates more clearly our comparative year-to-year operating results. Furthermore, our management and Compensation Committee of the Board use the above-mentioned non-GAAP financial measures to analyze and compare our underlying operating results and use 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.

Reconciliation of Non-GAAP Financial Measure: Cash Flow Before Share Repurchases and Changes in Debt

The following table reconciles net increase (decrease) in cash and cash equivalents to cash flow before share repurchases and changes in debt, which is presented in “Selected Financial Data”:

	Fiscal Year Ended August
(in thousands)	2013		2012		2011			2010		2009
Net increase (decrease) in cash and cash equivalents	$	39,098	$	5,487	$	(674	)	$	5,574	$	(149,755	)
Less: Increase in debt		418,652		418,729		442,201			181,586		476,900
Plus: Share repurchases		1,387,315		1,362,869		1,466,802			1,123,655		1,300,002
Cash flow before share repurchases and changes in debt	$	1,007,761	$	949,627	$	1,023,927		$	947,643	$	673,347

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Reconciliation of Non-GAAP Financial Measure: After-tax Return on Invested Capital

The following table calculates the percentage of ROIC. ROIC is calculated as after-tax operating profit (excluding rent) divided by average invested capital (which includes a factor to capitalize operating leases). The ROIC percentages are presented in “Selected Financial Data” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations”:

	Fiscal Year Ended August
(in thousands, except percentages)	2013 (1)			2012			2011			2010			2009
Net income	$	1,016,480		$	930,373		$	848,974		$	738,311		$	657,049
Adjustments:
Interest expense		185,415			175,905			170,557			158,909			142,316
Rent expense		246,340			229,417			213,846			195,632			181,308
Tax effect (2)		(155,432	)		(145,916	)		(137,962	)		(128,983	)		(117,929	)
After-tax return	$	1,292,803		$	1,189,779		$	1,095,415		$	963,869		$	862,744
Average debt (3)	$	3,951,360		$	3,508,970		$	3,121,880		$	2,769,617		$	2,468,351
Average (deficit) (4)		(1,581,832	)		(1,372,342	)		(993,624	)		(507,885	)		(75,162	)
Rent × 6 (5)		1,478,040			1,376,502			1,283,076			1,173,792			1,087,848
Average capital lease obligations (6)		102,729			96,027			84,966			62,220			58,901
Pre-tax invested capital	$	3,950,297		$	3,609,157		$	3,496,298		$	3,497,744		$	3,539,938
ROIC		32.7	%		33.0	%		31.3	%		27.6	%		24.4	%

(1) The fiscal year ended August 31, 2013 consisted of 53 weeks.

(2) The effective tax rate during fiscal 2013, 2012, 2011, 2010 and 2009 was 36.0%, 36.0%, 35.9%, 36.4% and 36.4%, respectively.

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

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

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

(6) Average capital lease obligations is computed as the average of our capital lease obligations over the previous five quarters.

Reconciliation of Non-GAAP Financial Measure: Fiscal 2013 Results Excluding Impact of 53^rd Week:

The following table summarizes the impact of the additional week to the 53 week fiscal year ended August 31, 2013.

(in thousands, except per share and percentages)	Fiscal 2013 Results of Operations		Percent of Revenue			Results of Operations for 53rd Week			Fiscal 2013 Results of Operations Excluding 53rd Week		Percent of Revenue
Net sales	$	9,147,530		100.0	%	$	(177,722	)	$	8,969,808		100.0	%
Cost of sales		4,406,595		48.2	%		(85,281	)		4,321,314		48.2	%
Gross profit		4,740,935		51.8	%		(92,441	)		4,648,494		51.8	%
Operating expenses		2,967,837		32.4	%		(52,605	)		2,915,232		32.5	%
Operating profit		1,773,098		19.4	%		(39,836	)		1,733,262		19.3	%
Interest expense, net		185,415		2.0	%		(3,524	)		181,891		2.0	%
Income before taxes		1,587,683		17.4	%		(36,312	)		1,551,371		17.3	%
Income taxes		571,203		6.2	%		(12,883	)		558,320		6.2	%
Net income	$	1,016,480		11.1	%	$	(23,429	)	$	993,051		11.1	%
Diluted earnings per share	$	27.79				$	(0.64	)	$	27.15

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Reconciliation of Non-GAAP Financial Measure: Adjusted Debt to EBITDAR

The following table calculates the ratio of adjusted debt to EBITDAR. Adjusted debt to EBITDAR is calculated as the sum of total debt, capital lease obligations and annual rents times six; divided by net income plus interest, taxes, depreciation, amortization, rent and share-based compensation expense. The adjusted debt to EBITDAR ratios are presented in “Selected Financial Data” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations”:

	Fiscal Year Ended August
(in thousands, except ratios)	2013 (1)		2012		2011		2010		2009
Net income	$	1,016,480	$	930,373	$	848,974	$	738,311	$	657,049
Add: Interest expense		185,415		175,905		170,557		158,909		142,316
Income tax expense		571,203		522,613		475,272		422,194		376,697
EBIT		1,773,098		1,628,891		1,494,803		1,319,414		1,176,062
Add: Depreciation expense		227,251		211,831		196,209		192,084		180,433
Rent expense		246,340		229,417		213,846		195,632		181,308
Share-based expense		37,307		33,363		26,625		19,120		19,135
EBITDAR	$	2,283,996	$	2,103,502	$	1,931,483	$	1,726,250	$	1,556,938
Debt	$	4,187,000	$	3,768,183	$	3,351,682	$	2,908,486	$	2,726,900
Capital lease obligations		106,171		102,256		86,656		88,280		54,764
Rent × 6		1,478,040		1,376,502		1,283,076		1,173,792		1,087,848
Adjusted debt	$	5,771,211	$	5,246,941	$	4,721,414	$	4,170,558	$	3,869,512
Adjusted debt to EBITDAR		2.5		2.5		2.4		2.4		2.5

(1) The fiscal year ended August 31, 2013 consisted of 53 weeks.

Recent Accounting Pronouncements

See Note A of the Notes to Consolidated Financial Statements for a discussion on recent accounting pronouncements.

Critical Accounting Policies and Estimates

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. In the notes to our consolidated financial statements, we describe our significant accounting policies used in preparing the consolidated financial statements. Our policies are evaluated on an ongoing basis and 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 senior management has identified the critical accounting policies for the areas that are materially impacted by estimates and assumptions and have discussed such policies with the Audit Committee of our Board. The following items in our consolidated financial statements represent our critical accounting policies that require significant estimation or judgment by management:

Inventory Reserves and Cost of Sales

LIFO

We state our inventories at the lower of cost or market using the last-in, first-out (“LIFO”) method for domestic merchandise and the first-in, first out (“FIFO”) method for Mexico inventories. Due to price deflation on our merchandise purchases, our domestic inventory balances are effectively maintained under the FIFO method. We do not write up inventory for favorable LIFO adjustments, and due to price deflation, LIFO costs of our domestic inventories exceed replacement costs by $283.7 million at August 31, 2013, calculated using the dollar value method.

29

Inventory Obsolescence and Shrinkage

Our inventory, primarily hard parts, maintenance items, accessories and non-automotive products, is used on vehicles that have rather long lives; and therefore, the risk of obsolescence is minimal and the majority of excess inventory has historically been returned to our vendors for credit. In the isolated instances where less than full credit will be received for such returns and where we anticipate that items will be sold at retail prices that are less than recorded costs, we record a charge (less than $20 million in each of the last three years) through cost of sales for the difference. These charges are based on management’s judgment, including estimates and assumptions regarding marketability of products and the market value of inventory to be sold in future periods.

Historically, we have not encountered material exposure to inventory obsolescence or excess inventory, nor have we experienced material changes to our estimates. However, we may be exposed to material losses should our vendors alter their policy with regard to accepting excess inventory returns.

Additionally, we reduce inventory for projected losses related to shrinkage, which is estimated based on historical losses and current inventory loss trends resulting from previous physical inventories. Shrinkage may occur due to theft, loss or inaccurate records for the receipt of goods, among other things. Throughout the year, we take physical inventory counts of our stores and distribution centers to verify these estimates. We make assumptions regarding upcoming physical inventory counts that may differ from actual results. Over the last three years, there has been less than a 50 basis point fluctuation in our shrinkage rate.

Each quarter, we evaluate the accrued shrinkage in light of the actual shrink results. To the extent our actual physical inventory count results differ from our estimates, we may experience material adjustments to our financial statements. Historically, we have not experienced material adjustments to our shrinkage estimates and do not believe there is a reasonable likelihood that there will be a material change in the future estimates or assumptions we use.

A 10% difference in our inventory reserves as of August 31, 2013, would have affected net income by approximately $6 million in fiscal 2013.

Vendor Allowances

We receive various payments and allowances from our vendors through a variety of programs and arrangements, including allowances for warranties, advertising and general promotion of vendor products. Vendor allowances are treated as a reduction of inventory, unless they are provided as a reimbursement of specific, incremental, identifiable costs incurred by the Company in selling the vendor’s products. Approximately 87% of the vendor funds received are recorded as a reduction of the cost of inventories and recognized as a reduction to cost of sales as these inventories are sold.

Based on our vendor agreements, a significant portion of vendor funding we receive is based on our inventory purchases. Therefore, we record receivables for funding earned but not yet received as we purchase inventory. During the year, we regularly review the receivables from vendors to ensure vendors are able to meet their obligations. We generally have not recorded a reserve against these receivables as we have legal right of offset with our vendors for payments owed them. Historically, we have had write-offs less than $500 thousand in each of the last three years.

Goodwill and Intangibles

We evaluate goodwill and indefinite-lived intangibles for impairment annually in the fourth quarter of each fiscal year or whenever events or changes in circumstances indicate the carrying values exceeds the current fair value. We evaluate the likelihood of impairment by considering qualitative factors, such as macroeconomic, industry, market, or any other factors that could impact the reporting unit’s fair value. If these factors indicate impairment, we perform a quantitative assessment to determine if the carrying value exceeds the fair value. Goodwill is evaluated at the reporting unit level and involves valuation methods including forecasting future financial performance, estimates of discount rates, and other factors. If the carrying value of the reporting unit’s goodwill exceeds the fair value, we recognize an impairment loss.

Indefinite-lived intangibles are evaluated by comparing the carrying amount of the asset to the future discounted cash flows that the asset is expected to generate. If the carrying value of the indefinite-lived intangible asset

30

exceeds the fair value based on the future discounted cash flows, we recognize an impairment loss. These impairment analyses require a significant amount of subjective judgment by management, and as a result these estimates are uncertain and our actual results may be different from our estimates.

The carrying value of goodwill at August 31, 2013 and August 25, 2012 was $367.8 million and $302.6 million, respectively. During fiscal fourth quarter of 2013, we recorded an $18.3 million goodwill impairment charge in our Other business activities related to the goodwill of AutoAnything and a $4.1 million impairment charge to AutoAnything’s trade name. The $4.1 million impairment charge resulted in a remaining carrying value of $24.6 million at August 31, 2013. No indefinite-lived intangible amounts were recorded at August 25, 2012. We also determined AutoAnything is not likely to achieve the operating income targets necessary to earn the contingent consideration. Therefore, these impairment charges were offset by an adjustment of $23.3 million to the contingent consideration liability to reflect its fair value at August 31, 2013. No impairment charges were recognized in our Other business activities in previous fiscal years. No impairment charges were recognized in the Auto Parts Stores reporting segment during fiscal 2013 or in previous fiscal years. We do not believe there is a reasonable likelihood that there will be a material change in the future estimates or assumptions used to evaluate goodwill or indefinite-lived intangibles.

Self-Insurance Reserves

We retain a significant portion of the risks associated with workers’ compensation, employee health, general and products liability, property and vehicle liability; and we obtain third party insurance to limit the exposure related to certain of these risks. Our self-insurance reserve estimates totaled $190.2 million at August 31, 2013, and $175.8 million at August 25, 2012. This change is primarily reflective of our growing operations, including inflation, increases in health care costs, the number of vehicles and the number of hours worked, as well as our historical claims experience and changes in our discount rate.

The assumptions made by management in estimating our self-insurance reserves include consideration of historical cost experience, judgments about the present and expected levels of cost per claim and retention levels. We utilize various methods, including analyses of historical trends and actuarial methods, to estimate the cost to settle reported claims, and claims incurred but not yet reported. The actuarial methods develop estimates of the future ultimate claim costs based on the claims incurred as of the balance sheet date. When estimating these liabilities, we consider factors, such as the severity, duration and frequency of claims, legal costs associated with claims, healthcare trends, and projected inflation of related factors. In recent history, our methods for determining our exposure have remained consistent, and our historical trends have been appropriately factored into our reserve estimates. As we obtain additional information and refine our methods regarding the assumptions and estimates we use to recognize liabilities incurred, we will adjust our reserves accordingly.

Management believes that the various assumptions developed and actuarial methods used to determine our self-insurance reserves are reasonable and provide meaningful data and information that management uses to make its best estimate of our exposure to these risks. Arriving at these estimates, however, requires a significant amount of subjective judgment by management, and as a result these estimates are uncertain and our actual exposure may be different from our estimates. For example, changes in our assumptions about health care costs, the severity of accidents and the incidence of illness, the average size of claims and other factors could cause actual claim costs to vary materially from our assumptions and estimates, causing our reserves to be overstated or understated. For instance, a 10% change in our self-insurance liability would have affected net income by approximately $12 million for fiscal 2013.

Our liabilities for workers’ compensation, certain general and product liability, property and vehicle claims do not have scheduled maturities; however, the timing of future payments is predictable based on historical patterns and is relied upon in determining the current portion of these liabilities. Accordingly, we reflect the net present value of the obligations we determine to be long-term using the risk-free interest rate as of the balance sheet date. If the discount rate used to calculate the present value of these reserves changed by 50 basis points, net income would have been affected by approximately $2 million for fiscal 2013. Our liability for health benefits is classified as current, as the historical average duration of claims is approximately six weeks.

Income Taxes

Our income tax returns are audited by state, federal and foreign tax authorities, and we are typically engaged in various tax examinations at any given time. Tax contingencies often arise due to uncertainty or differing interpretations of the application of tax rules throughout the various jurisdictions in which we operate. The

31

contingencies are influenced by items such as tax audits, changes in tax laws, litigation, appeals and prior experience with similar tax positions. We regularly review our tax reserves for these items and assess the adequacy of the amount we have recorded. As of August 31, 2013, we had approximately $35.4 million reserved for uncertain tax positions.

We evaluate potential exposures associated with our various tax filings by estimating a liability for uncertain tax positions based on a two-step process. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates that it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step requires us to estimate and measure the tax benefit as the largest amount that is more than 50% likely to be realized upon ultimate settlement.

We believe our estimates to be reasonable and have not experienced material adjustments to our reserves in the previous three years; however, actual results could differ from our estimates, and we may be exposed to gains or losses that could be material. Specifically, management has used judgment and made assumptions to estimate the likely outcome of uncertain tax positions. Additionally, to the extent we prevail in matters for which a liability has been established, or must pay in excess of recognized reserves, our effective tax rate in any particular period could be materially affected.

Pension Obligation

Prior to January 1, 2003, substantially all full-time employees were covered by a qualified defined benefit pension plan. The benefits under the plan were based on years of service and the employee’s highest consecutive five-year average compensation. On January 1, 2003, the plan was frozen. Accordingly, pension plan participants will earn no new benefits under the plan formula and no new participants will join the pension plan. On January 1, 2003, our supplemental, unqualified defined benefit pension plan for certain highly compensated employees was also frozen. Accordingly, plan participants will earn no new benefits under the plan formula and no new participants will join the pension plan. As the plan benefits are frozen, the annual pension expense and recorded liabilities are not impacted by increases in future compensation levels, but are impacted by the use of two key assumptions in the calculation of these balances:

Expected long-term rate of return on plan assets: For the fiscal year ended August 31, 2013, we have assumed a 7.5% long-term rate of return on our plan assets. This estimate is a judgmental matter in which management considers the composition of our asset portfolio, our historical long-term investment performance and current market conditions. We review the expected long-term rate of return on an annual basis, and revise it accordingly. Additionally, we monitor the mix of investments in our portfolio to ensure alignment with our long-term strategy to manage pension cost and reduce volatility in our assets. At August 31, 2013, our plan assets totaled $208 million in our qualified plan. Our assets are generally valued using the net asset values, which are determined by valuing investments at the closing price or last trade reported on the major market on which the individual securities are traded. We have no assets in our nonqualified plan. A 50 basis point change in our expected long term rate of return would impact annual pension expense by approximately $1 million for the qualified plan.

Discount rate used to determine benefit obligations: This rate is highly sensitive and is adjusted annually based on the interest rate for long-term, high-quality, corporate bonds as of the measurement date using yields for maturities that are in line with the duration of our pension liabilities. This same discount rate is also used to determine pension expense for the following plan year. For fiscal 2013, we assumed a discount rate of 5.2%. A decrease in the discount rate increases our projected benefit obligation and pension expense. A 50 basis point change in the discount rate at August 31, 2013 would impact annual pension expense/income by approximately $2 million for the qualified plan and $30 thousand for the nonqualified plan.

32

Item 7A. Quantitative and Qualitative Disclosures about Market Risk

We are exposed to market risk from, among other things, changes in interest rates, foreign exchange rates and fuel prices. From time to time, we use various derivative instruments to reduce interest rate and fuel price risks. To date, based upon our current level of foreign operations, no derivative instruments have been utilized to reduce foreign exchange rate risk. All of our hedging activities are governed by guidelines that are authorized by the Board. Further, we do not buy or sell derivative instruments for trading purposes.

Interest Rate Risk

Our financial market risk results primarily from changes in interest rates. At times, we reduce our exposure to changes in interest rates by entering into various interest rate hedge instruments such as interest rate swap contracts, treasury lock agreements and forward-starting interest rate swaps.

We have historically utilized interest rate swaps to convert variable rate debt to fixed rate debt and to lock in fixed rates on future debt issuances. We reflect the current fair value of all interest rate hedge instruments as a component of either other current assets or accrued expenses and other. Our interest rate hedge instruments are designated as cash flow hedges.

Unrealized gains and losses on interest rate hedges are deferred in stockholders’ deficit as a component of Accumulated other comprehensive loss. These deferred gains and losses are recognized in income as a decrease or increase to interest expense in the period in which the related cash flows being hedged are recognized in expense. However, to the extent that the change in value of an interest rate hedge instrument does not perfectly offset the change in the value of the cash flow being hedged, that ineffective portion is immediately recognized in earnings.

During the fourth quarter of fiscal 2012, we 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, we 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.

The fair value of our debt was estimated at $4.259 billion as of August 31, 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 us for debt having the same remaining maturities. Such fair value is greater than the carrying value of debt by $72.2 million and $286.6 million at August 31, 2013 and August 25, 2012, respectively. We had $637.0 million of variable rate debt outstanding at August 31, 2013, and $518.2 million of variable rate debt outstanding at August 25, 2012. In fiscal 2013, at this borrowing level for variable rate debt, a one percentage point increase in interest rates would have had an unfavorable impact on our pre-tax earnings and cash flows of approximately $6 million. The primary interest rate exposure on variable rate debt is based on LIBOR. We had outstanding fixed rate debt of $3.550 billion at August 31, 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 approximately $128.4 million at August 31, 2013.

Fuel Price Risk

From time to time, we utilize fuel swap contracts in order to lower fuel cost volatility in our operating results. Historically, the instruments were executed to economically hedge a portion of our diesel and unleaded fuel

33

exposure. However, we have not designated the fuel swap contracts as hedging instruments; and therefore, the contracts have not qualified for hedge accounting treatment. We did not enter into any fuel swap contracts during fiscal 2013, fiscal 2012 or fiscal 2011.

Foreign Currency Risk

Foreign currency exposures arising from transactions include firm commitments and anticipated transactions denominated in a currency other than our entities’ functional currencies. To minimize our risk, we generally enter into transactions denominated in the respective functional currencies. Foreign currency exposures arising from transactions denominated in currencies other than the functional currency are not material.

We are exposed to euros, Canadian dollars, and Brazilian reals, but our primary foreign currency exposure arises from Mexican peso-denominated revenues and profits and their translation into U.S. dollars.

We view our investments in Mexican subsidiaries as long-term. As a result, we generally do not hedge these net investments. The net asset exposure in the Mexican subsidiaries translated into U.S. dollars using the year-end exchange rates was $378.7 million at August 31, 2013 and $315.7 million at August 25, 2012. The year-end exchange rates with respect to the Mexican peso decreased by approximately 1.1% with respect to the U.S. dollar during fiscal 2013 and decreased by approximately 6.2% during fiscal 2012. The potential loss in value of our net assets in the Mexican subsidiaries resulting from a hypothetical 10 percent adverse change in quoted foreign currency exchange rates at August 31, 2013 and August 25, 2012, amounted to approximately $34 million and approximately $29 million, respectively. Any changes in our net assets in the Mexican subsidiaries relating to foreign currency exchange rates would be reflected in the foreign currency translation component of Accumulated other comprehensive loss, unless the Mexican subsidiaries are sold or otherwise disposed. A hypothetical 10 percent adverse change in average exchange rates would not have a material impact on our results of operations.

34

Item 8. Financial Statements and Supplementary Data

Index

Management’s Report on Internal Control Over Financial Reporting	36
Certifications	36
Reports of Independent Registered Public Accounting Firm	37
Consolidated Statements of Income	39
Consolidated Statements of Comprehensive Income	39
Consolidated Balance Sheets	40
Consolidated Statements of Cash Flows	41
Consolidated Statements of Stockholders’ Deficit	42
Notes to Consolidated Financial Statements	43

35

Management’s Report on Internal Control Over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Securities Exchange Act of 1934, as amended). Our internal control over financial reporting includes, among other things, defined policies and procedures for conducting and governing our business, sophisticated information systems for processing transactions and properly trained staff. Mechanisms are in place to monitor the effectiveness of our internal control over financial reporting, including regular testing performed by the Company’s internal audit team, which is comprised of Company personnel. Actions are taken to correct deficiencies as they are identified. Our procedures for financial reporting include the active involvement of senior management, our Audit Committee and a staff of highly qualified financial and legal professionals.

Management, with the participation of our principal executive and financial officers, assessed our internal control over financial reporting as of August 31, 2013, the end of our fiscal year. Management based its assessment on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission 1992 framework.

Based on this assessment, management has concluded that our internal control over financial reporting was effective as of August 31, 2013.

Our independent registered public accounting firm, Ernst & Young LLP, audited the effectiveness of our internal control over financial reporting. Ernst & Young LLP’s attestation report on the Company’s internal control over financial reporting as of August 31, 2013 is included in this Annual Report on Form 10-K.

/s/ WILLIAM C. RHODES, III

William C. Rhodes, III

Chairman, President and

Chief Executive Officer

(Principal Executive Officer)

/s/ WILLIAM T. GILES

William T. Giles

Chief Financial Officer and Executive

Vice President – Finance, Information

Technology and ALLDATA

(Principal Financial Officer)

Certifications

Compliance with NYSE Corporate Governance Listing Standards

On January 2, 2013, the Company submitted to the New York Stock Exchange the Annual CEO Certification required pursuant to Section 303A.12(a) of the New York Stock Exchange Listed Company Manual.

Rule 13a-14(a) Certifications of Principal Executive Officer and Principal Financial Officer

The Company has filed, as exhibits to its Annual Report on Form 10-K for the fiscal year ended August 31, 2013, the certifications of its Principal Executive Officer and Principal Financial Officer required pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

36

Report of Independent Registered Public Accounting Firm

The Board of Directors and Stockholders of AutoZone, Inc.

We have audited AutoZone, Inc.’s internal control over financial reporting as of August 31, 2013, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission 1992 framework (the “COSO criteria”). AutoZone, Inc.’s management is responsible for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management’s Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on AutoZone, Inc.’s internal control over financial reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A company’s internal control over financial reporting is a process designed 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. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In our opinion, AutoZone, Inc. maintained, in all material respects, effective internal control over financial reporting as of August 31, 2013, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets of AutoZone, Inc. as of August 31, 2013 and August 25, 2012, and the related consolidated statements of income, comprehensive income, stockholders’ deficit, and cash flows for each of the three years in the period ended August 31, 2013 of AutoZone, Inc. and our report dated October 28, 2013 expressed an unqualified opinion thereon.

/s/ Ernst & Young LLP

Memphis, Tennessee

October 28, 2013

37

Report of Independent Registered Public Accounting Firm

The Board of Directors and Stockholders of AutoZone, Inc.

We have audited the accompanying consolidated balance sheets of AutoZone, Inc. as of August 31, 2013 and August 25, 2012, and the related consolidated statements of income, comprehensive income, stockholders’ deficit, and cash flows for each of the three years in the period ended August 31, 2013. These financial statements are the responsibility of AutoZone, Inc.’s management. Our responsibility is to express an opinion on these financial statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in all material respects, the consolidated financial position of AutoZone, Inc. as of August 31, 2013 and August 25, 2012, and the consolidated results of its operations and its cash flows for each of the three years in the period ended August 31, 2013, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), AutoZone, Inc.’s internal control over financial reporting as of August 31, 2013, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission 1992 framework and our report dated October 28, 2013 expressed an unqualified opinion thereon.

/s/ Ernst & Young LLP

Memphis, Tennessee

October 28, 2013

38

Consolidated Statements of Income

	Year Ended
(in thousands, except per share data)	August 31, 2013 (53 weeks)		August 25, 2012 (52 weeks)		August 27, 2011 (52 weeks)
Net sales	$	9,147,530	$	8,603,863	$	8,072,973
Cost of sales, including warehouse and delivery expenses		4,406,595		4,171,827		3,953,510
Gross profit		4,740,935		4,432,036		4,119,463
Operating, selling, general and administrative expenses		2,967,837		2,803,145		2,624,660
Operating profit		1,773,098		1,628,891		1,494,803
Interest expense, net		185,415		175,905		170,557
Income before income taxes		1,587,683		1,452,986		1,324,246
Income tax expense		571,203		522,613		475,272
Net income	$	1,016,480	$	930,373	$	848,974
Weighted average shares for basic earnings per share		35,943		38,696		42,632
Effect of dilutive stock equivalents		638		929		971
Adjusted weighted average shares for diluted earnings per share		36,581		39,625		43,603
Basic earnings per share	$	28.28	$	24.04	$	19.91
Diluted earnings per share	$	27.79	$	23.48	$	19.47

See Notes to Consolidated Financial Statements.

Consolidated Statements of Comprehensive Income

	Year Ended
(in thousands)	August 31, 2013 (53 weeks)			August 25, 2012 (52 weeks)			August 27, 2011 (52 weeks)
Net income	$	1,016,480		$	930,373		$	848,974
Other comprehensive income (loss):
Pension liability adjustments, net of taxes (1)		43,106			(17,262	)		(17,346	)
Foreign currency translation adjustments		(12,216	)		(13,866	)		8,347
Unrealized loss on marketable securities, net of taxes (2)		(376	)		(128	)		(171	)
Net derivative activity, net of taxes (3)		711			(1,066	)		(4,053	)
Total other comprehensive income (loss)		31,225			(32,322	)		(13,223	)
Comprehensive income	$	1,047,705		$	898,051		$	835,751

(1) Pension liability adjustments are presented net of taxes of $27,972 in 2013, $29,744 in 2012, and $3,998 in 2011

(2) Unrealized losses on marketable securities are presented net of taxes of $202 in 2013, $69 in 2012 and $91 in 2011

(3) Net derivative activities are presented net of taxes of $440 in 2013, $4,800 in 2012, and $0 in 2011

See Notes to Consolidated Financial Statements.

39

Consolidated Balance Sheets

(in thousands)	August 31, 2013			August 25, 2012
Assets
Current assets:
Cash and cash equivalents	$	142,191		$	103,093
Accounts receivable		171,638			161,375
Merchandise inventories		2,861,014			2,627,983
Other current assets		101,443			85,649
Deferred income taxes		1,727			846
Total current assets		3,278,013			2,978,946
Property and equipment:
Land		862,565			800,175
Buildings and improvements		2,607,751			2,400,895
Equipment		1,122,821			1,016,835
Leasehold improvements		341,182			314,559
Construction in progress		124,206			127,297
		5,058,525			4,659,761
Less: Accumulated depreciation and amortization		1,987,164			1,803,833
		3,071,361			2,855,928
Goodwill		367,829			302,645
Deferred income taxes		4,069			33,796
Other long-term assets		170,817			94,324
		542,715			430,765
	$	6,892,089		$	6,265,639
Liabilities and Stockholders’ Deficit
Current liabilities:
Accounts payable	$	3,307,535		$	2,926,740
Accrued expenses and other		467,831			478,085
Income taxes payable		17,129			17,053
Deferred income taxes		202,922			183,833
Short-term borrowings		173,733			49,881
Total current liabilities		4,169,150			3,655,592
Long-term debt		4,013,267			3,718,302
Other long-term liabilities		396,991			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; 36,768 shares issued and 34,293 shares outstanding in 2013 and 39,869 shares issued and 37,028 shares outstanding in 2012		368			399
Additional paid-in capital		814,457			689,890
Retained deficit		(1,378,936	)		(1,033,197	)
Accumulated other comprehensive loss		(120,788	)		(152,013	)
Treasury stock, at cost		(1,002,420	)		(1,053,104	)
Total stockholders’ deficit		(1,687,319	)		(1,548,025	)
	$	6,892,089		$	6,265,639

See Notes to Consolidated Financial Statements.

40

Consolidated Statements of Cash Flows

	Year Ended
(in thousands)	August 31, 2013 (53 weeks)			August 25, 2012 (52 weeks)			August 27, 2011 (52 weeks)
Cash flows from operating activities:
Net income	$	1,016,480		$	930,373		$	848,974
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of property and equipment		227,251			211,831			196,209
Amortization of debt origination fees		8,239			8,066			8,962
Income tax benefit from exercise of stock options		(66,752	)		(63,041	)		(34,945	)
Deferred income taxes		19,704			25,557			44,667
Share-based compensation expense		37,307			33,363			26,625
Changes in operating assets and liabilities:
Accounts receivable		(8,196	)		(21,276	)		(14,605	)
Merchandise inventories		(232,846	)		(167,914	)		(155,421	)
Accounts payable and accrued expenses		356,935			197,406			342,826
Income taxes payable		61,003			56,754			34,319
Other, net		(4,114	)		12,862			(6,073	)
Net cash provided by operating activities		1,415,011			1,223,981			1,291,538
Cash flows from investing activities:
Capital expenditures		(414,451	)		(378,054	)		(321,604	)
Acquisition of business		(116,084	)		—			—
Purchase of marketable securities		(44,469	)		(45,665	)		(43,772	)
Proceeds from sale of marketable securities		37,944			42,385			43,081
Proceeds from disposal of capital assets		9,765			6,573			3,301
Net cash used in investing activities		(527,295	)		(374,761	)		(318,994	)
Cash flows from financing activities:
Net proceeds (payments) of commercial paper		123,600			(54,200	)		134,600
Net (payments) proceeds from short-term borrowings		(4,948	)		(27,071	)		6,901
Proceeds from issuance of debt		800,000			500,000			500,000
Repayment of debt		(500,000	)		—			(199,300	)
Net proceeds from sale of common stock		97,154			75,343			55,846
Purchase of treasury stock		(1,387,315	)		(1,362,869	)		(1,466,802	)
Income tax benefit from exercise of stock options		66,752			63,041			34,945
Payments of capital lease obligations		(27,545	)		(26,750	)		(22,781	)
Other		(14,720	)		(10,927	)		(17,180	)
Net cash used in financing activities		(847,022	)		(843,433	)		(973,771	)
Effect of exchange rate changes on cash		(1,596	)		(300	)		553
Net increase (decrease) in cash and cash equivalents		39,098			5,487			(674	)
Cash and cash equivalents at beginning of year		103,093			97,606			98,280
Cash and cash equivalents at end of year	$	142,191		$	103,093		$	97,606
Supplemental cash flow information:
Interest paid, net of interest cost capitalized	$	174,037		$	161,797		$	155,531
Income taxes paid	$	498,587		$	443,666		$	405,654
Assets acquired through capital lease	$	71,117		$	74,726		$	32,301

See Notes to Consolidated Financial Statements.

41

Consolidated Statements of Stockholders’ Deficit

(in thousands)	Common Shares Issued			Common Stock			Additional Paid-in Capital			Retained (Deficit) Earnings			Accumulated Other Comprehensive Loss			Treasury Stock			Total
Balance at August 28, 2010		50,061		$	501		$	557,955		$	(245,344	)	$	(106,468	)	$	(945,409	)	$	(738,765	)
Net income											848,974									848,974
Total other comprehensive loss														(13,223	)					(13,223	)
Purchase of 5,598 shares of treasury stock																	(1,466,802	)		(1,466,802	)
Retirement of treasury shares		(6,577	)		(66	)		(82,150	)		(1,247,627	)					1,329,843			—
Sale of common stock under stock options and stock purchase plans		600			6			55,840												55,846
Share-based compensation expense								24,794												24,794
Income tax benefit from exercise of stock options								34,945												34,945
Other											(1	)								(1	)
Balance at August 27, 2011		44,084			441			591,384			(643,998	)		(119,691	)		(1,082,368	)		(1,254,232	)
Net income											930,373									930,373
Total other comprehensive loss														(32,322	)					(32,322	)
Purchase of 3,795 shares of treasury stock																	(1,362,869	)		(1,362,869	)
Retirement of treasury shares		(4,929	)		(49	)		(72,512	)		(1,319,572	)					1,392,133			—
Sale of common stock under stock options and stock purchase plans		714			7			75,336												75,343
Share-based compensation expense								32,641												32,641
Income tax benefit from exercise of stock options								63,041												63,041
Balance at August 25, 2012		39,869			399			689,890			(1,033,197	)		(152,013	)		(1,053,104	)		(1,548,025	)
Net income											1,016,480									1,016,480
Total other comprehensive income														31,225						31,225
Purchase of 3,511 shares of treasury stock																	(1,387,315	)		(1,387,315	)
Retirement of treasury shares		(3,876	)		(39	)		(75,743	)		(1,362,218	)					1,438,000			—
Sale of common stock under stock options and stock purchase plans		775			8			97,146												97,154
Share-based compensation expense								36,412												36,412
Income tax benefit from exercise of stock options								66,752												66,752
Other											(1	)					(1	)		(2	)
Balance at August 31, 2013		36,768		$	368		$	814,457		$	(1,378,936	)	$	(120,788	)	$	(1,002,420	)	$	(1,687,319	)

See Notes to Consolidated Financial Statements.

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Notes to Consolidated Financial Statements

Note A – Significant Accounting Policies

Business: AutoZone, Inc. and its wholly owned subsidiaries (“AutoZone” or the “Company”) are principally a retailer and distributor of automotive parts and accessories. At the end of fiscal 2013, the Company operated 4,836 stores in the United States (“U.S.”), including Puerto Rico; 362 stores in Mexico; and three stores in 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. In 3,421 of the domestic stores, select stores in Mexico, and the stores in Brazil, at the end of fiscal 2013, the Company had 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. The Company also sells the ALLDATA brand automotive diagnostic and repair software through www.alldata.com. Additionally, the Company sells automotive hard parts, maintenance items, accessories, and non-automotive products through www.autozone.com, and accessories and performance parts through www.autoanything.com, and its commercial customers can make purchases through www.autozonepro.com. The Company does not derive revenue from automotive repair or installation services.

Fiscal Year: The Company’s fiscal year consists of 52 or 53 weeks ending on the last Saturday in August. Fiscal 2013 represented 53 weeks and fiscal 2012 and 2011 represented 52 weeks.

Basis of Presentation: The consolidated financial statements include the accounts of AutoZone, Inc. and its wholly owned subsidiaries. All significant intercompany transactions and balances have been eliminated in consolidation.

Use of Estimates: Management of the Company has made a number of estimates and assumptions relating to the reporting of assets and liabilities and the disclosure of contingent liabilities to prepare these financial statements. Actual results could differ from those estimates.

Cash and Cash Equivalents: Cash equivalents consist of investments with original maturities of 90 days or less at the date of purchase. Cash equivalents include proceeds due from credit and debit card transactions with settlement terms of less than 5 days. Credit and debit card receivables included within cash and cash equivalents were $39.8 million at August 31, 2013 and $34.0 million at August 25, 2012.

Cash balances are held in various locations around the world. Of the $142.2 million and $103.1 million of cash and cash equivalents at August 31, 2013, and August 25, 2012, respectively, $38.2 million and $7.8 million, respectively, were held outside of the U.S. and were generally utilized to support liquidity needs in foreign operations. The Company intends to continue to permanently reinvest the cash held outside of the U.S. in its foreign operations.

Accounts Receivable: Accounts receivable consists of receivables from commercial customers and vendors, and are presented net of an allowance for uncollectible accounts. AutoZone routinely grants credit to certain of its commercial customers. The risk of credit loss in its trade receivables is substantially mitigated by the Company’s credit evaluation process, short collection terms and sales to a large number of customers, as well as the low dollar value per transaction for most of its sales. Allowances for potential credit losses are determined based on historical experience and current evaluation of the composition of accounts receivable. Historically, credit losses have been within management’s expectations and the allowances for uncollectible accounts were $2.9 million at August 31, 2013, and $2.4 million at August 25, 2012.

Merchandise Inventories: Inventories are stated at the lower of cost or market using the last-in, first-out method for domestic inventories and the first-in, first out (“FIFO”) method for Mexico inventories. Included in inventory 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 our merchandise purchases, was $283.7 million at August 31, 2013, and $270.4 million at August 25, 2012.

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Marketable Securities: The Company invests a portion of its assets held by the Company’s wholly owned insurance captive in marketable debt securities and classifies them as available-for-sale. The Company includes these securities within the Other current assets and Other long-term assets captions in the accompanying Consolidated Balance Sheets and records the amounts at fair market value, which is determined using quoted market prices at the end of the reporting period. A discussion of marketable securities is included in “Note E – Fair Value Measurements” and “Note F – Marketable Securities.”

Property and Equipment: Property and equipment is stated at cost. Depreciation and amortization are computed principally using the straight-line method over the following estimated useful lives: buildings, 40 to 50 years; building improvements, 5 to 15 years; equipment, 3 to 10 years; and leasehold improvements, over the shorter of the asset’s estimated useful life or the remaining lease term, which includes any reasonably assured renewal periods. Depreciation and amortization include amortization of assets under capital lease.

Impairment of Long-Lived Assets: The Company evaluates the recoverability of its long-lived assets whenever events or changes in circumstances indicate that the carrying value of an asset may not be recoverable. When such an event occurs, the Company compares the sum of the undiscounted expected future cash flows of the asset (asset group) with the carrying amounts of the asset. If the undiscounted expected future cash flows are less than the carrying value of the assets, the Company measures the amount of impairment loss as the amount by which the carrying amount of the assets exceeds the fair value of the assets. There were no material impairment losses recorded in the three years ended August 31, 2013.

Goodwill: The cost in excess of fair value of identifiable net assets of businesses acquired is recorded as goodwill. Goodwill has not been amortized since fiscal 2001, but an analysis is performed at least annually to compare the fair value of the reporting unit to the carrying amount to determine if any impairment exists. The Company performs its annual impairment assessment in the fourth quarter of each fiscal year, unless circumstances dictate more frequent assessments. Refer to “Note N – Goodwill and Intangibles” for additional disclosures regarding the Company’s goodwill and impairment assessment.

Intangible Assets: Intangible assets consist of assets from the acquisition of AutoAnything, and include technology, noncompete agreements, customer relationships and trade name. Intangible assets are amortized over periods ranging from 5 to 10 years. Non-amortizing intangibles are reviewed at least annually for impairment by comparing the carrying amount to fair value. The Company performs its annual impairment assessment in the fourth quarter of each fiscal year, unless circumstances dictate more frequent assessments. Refer to “Note N – Goodwill and Intangibles” for additional disclosures regarding the Company’s intangible assets and impairment assessment.

Derivative Instruments and Hedging Activities: AutoZone is exposed to market risk from, among other things, changes in interest rates, foreign exchange rates and fuel prices. From time to time, the Company uses various derivative instruments to reduce such risks. To date, based upon the Company’s current level of foreign operations, no derivative instruments have been utilized to reduce foreign exchange rate risk. All of the Company’s hedging activities are governed by guidelines that are authorized by AutoZone’s Board of Directors (the “Board”). Further, the Company does not buy or sell derivative instruments for trading purposes.

AutoZone’s financial market risk results primarily from changes in interest rates. At times, AutoZone reduces its exposure to changes in interest rates by entering into various interest rate hedge instruments such as interest rate swap contracts, treasury lock agreements and forward-starting interest rate swaps. All of the Company’s interest rate hedge instruments are designated as cash flow hedges. Refer to “Note H – Derivative Financial Instruments” for additional disclosures regarding the Company’s derivative instruments and hedging activities. Cash flows related to these instruments designated as qualifying hedges are reflected in the accompanying Consolidated Statements of Cash Flows in the same categories as the cash flows from the items being hedged. Accordingly, cash flows relating to the settlement of interest rate derivatives hedging the forecasted issuance of debt have been reflected upon settlement as a component of financing cash flows. The resulting gain or loss from such settlement is deferred to Accumulated other comprehensive loss and reclassified to interest expense over the term of the underlying debt. This reclassification of the deferred gains and losses impacts the interest expense recognized on the underlying debt that was hedged and is therefore reflected as a component of operating cash flows in periods subsequent to settlement.

44

Foreign Currency: The Company accounts for its Mexican and Brazilian operations using the Mexican peso and the Brazilian real as the functional currencies and converts its financial statements from these currencies to U.S. dollars. The cumulative loss on currency translation is recorded as a component of Accumulated other comprehensive loss and approximated $62.5 million at August 31, 2013, and $50.3 million at August 25, 2012.

Self-Insurance Reserves: The Company retains a significant portion of the risks associated with workers’ compensation, employee health, general, products liability, property and vehicle insurance. Through various methods, which include analyses of historical trends and utilization of actuaries, the Company estimates the costs of these risks. The costs are accrued based upon the aggregate of the liability for reported claims and an estimated liability for claims incurred but not reported. Estimates are based on calculations that consider historical lag and claim development factors. The long-term portions of these liabilities are recorded at the Company’s estimate of their net present value.

Deferred Rent: The Company recognizes rent expense on a straight-line basis over the course of the lease term, which includes any reasonably assured renewal periods, beginning on the date the Company takes physical possession of the property (see “Note O – Leases”). Differences between this calculated expense and cash payments are recorded as a liability within the Accrued expenses and other and Other long-term liabilities captions in the accompanying Consolidated Balance Sheets, based on the terms of the lease. Deferred rent approximated $96.5 million as of August 31, 2013, and $86.9 million as of August 25, 2012.

Financial Instruments: 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 I – Financing,” marketable securities is included in “Note F – Marketable Securities,” and derivatives is included in “Note H – Derivative Financial Instruments.”

Income Taxes: The Company accounts for income taxes under the liability method. Deferred tax assets and liabilities are determined based on differences between financial reporting and tax bases of assets and liabilities and are measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse. Our effective tax rate is based on income by tax jurisdiction, statutory rates, and tax saving initiatives available to the Company in the various jurisdictions in which we operate.

The Company recognizes liabilities for uncertain income tax positions based on a two-step process. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates that it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step requires the Company to estimate and measure the tax benefit as the largest amount that is more than 50% likely to be realized upon ultimate settlement. It is inherently difficult and subjective to estimate such amounts, as the Company must determine the probability of various possible outcomes. The Company reevaluates these uncertain tax positions on a quarterly basis or when new information becomes available to management. These reevaluations are based on factors including, but not limited to, changes in facts or circumstances, changes in tax law, successfully settled issues under audit, expirations due to statutes, and new audit activity. Such a change in recognition or measurement could result in the recognition of a tax benefit or an increase to the tax accrual.

The Company classifies interest related to income tax liabilities, and if applicable, penalties, as a component of Income tax expense. The income tax liabilities and accrued interest and penalties that are expected to be payable within one year of the balance sheet date are presented within the Accrued expenses and other caption in the accompanying Consolidated Balance Sheets. The remaining portion of the income tax liabilities and accrued interest and penalties are presented within the Other long-term liabilities caption in the accompanying Consolidated Balance Sheets because payment of cash is not anticipated within one year of the balance sheet date. Refer to “Note D – Income Taxes” for additional disclosures regarding the Company’s income taxes.

Sales and Use Taxes: Governmental authorities assess sales and use taxes on the sale of goods and services. The Company excludes taxes collected from customers in its reported sales results; such amounts are included within the Accrued expenses and other caption until remitted to the taxing authorities.

45

Dividends: The Company currently does not pay a dividend on its common stock. The ability to pay dividends is subject to limitations imposed by Nevada law. Under Nevada law, any future payment of dividends would be dependent upon the Company’s financial condition, capital requirements, earnings and cash flow.

Revenue Recognition: The Company recognizes sales at the time the sale is made and the product is delivered to the customer. Revenue from sales are presented net of allowances for estimated sales returns, which are based on historical return rates.

A portion of the Company’s transactions include the sale of auto parts that contain a core component. The core component represents the recyclable portion of the auto part. Customers are not charged for the core component of the new part if a used core is returned at the point of sale of the new part; otherwise the Company charges customers a specified amount for the core component. The Company refunds that same amount upon the customer returning a used core to the store at a later date. The Company does not recognize sales or cost of sales for the core component of these transactions when a used part is returned or expected to be returned from the customer.

Vendor Allowances and Advertising Costs: The Company receives various payments and allowances from its vendors through a variety of programs and arrangements. Monies received from vendors include rebates, allowances and promotional funds. The amounts to be received are subject to the terms of the vendor agreements, which generally do not state an expiration date, but are subject to ongoing negotiations that may be impacted in the future based on changes in market conditions, vendor marketing strategies and changes in the profitability or sell-through of the related merchandise.

Rebates and other miscellaneous incentives are earned based on purchases or product sales and are accrued ratably over the purchase or sale of the related product. These monies are generally recorded as a reduction of merchandise inventories and are recognized as a reduction to cost of sales as the related inventories are sold.

For arrangements that provide for reimbursement of specific, incremental, identifiable costs incurred by the Company in selling the vendors’ products, the vendor funds are recorded as a reduction to Operating, selling, general and administrative expenses in the period in which the specific costs were incurred.

The Company expenses advertising costs as incurred. Advertising expense, net of vendor promotional funds, was $83.7 million in fiscal 2013, $74.7 million in fiscal 2012, and $71.5 million in fiscal 2011. Vendor promotional funds, which reduced advertising expense, amounted to $24.4 million in fiscal 2013, $19.7 million in fiscal 2012, and $23.2 million in fiscal 2011.

Cost of Sales and Operating, Selling, General and Administrative Expenses: The following illustrates the primary costs classified in each major expense category:

Cost of Sales

• Total cost of merchandise sold, including:

• Freight expenses associated with moving merchandise inventories from the Company’s vendors to the distribution centers;

• Vendor allowances that are not reimbursements for specific, incremental and identifiable costs

• Costs associated with operating the Company’s supply chain, including payroll and benefit costs, warehouse occupancy costs, transportation costs and depreciation; and

• Inventory shrinkage

Operating, Selling, General and Administrative Expenses

• Payroll and benefit costs for store and store support employees;

• Occupancy costs of store and store support facilities;

• Depreciation and amortization related to retail and store support assets;

• Transportation costs associated with commercial and hub deliveries;

• Advertising;

• Self insurance costs; and

• Other administrative costs, such as credit card transaction fees, supplies, and travel and lodging

46

Warranty Costs: The Company or the vendors supplying its products provides the Company’s customers limited warranties on certain products that range from 30 days to lifetime. In most cases, the Company’s vendors are primarily responsible for warranty claims. Warranty costs relating to merchandise sold under warranty not covered by vendors are estimated and recorded as warranty obligations at the time of sale based on each product’s historical return rate. These obligations, which are often funded by vendor allowances, are recorded within the Accrued expenses and other caption in the Consolidated Balance Sheets. For vendor allowances that are in excess of the related estimated warranty expense for the vendor’s products, the excess is recorded in inventory and recognized as a reduction to cost of sales as the related inventory is sold.

Shipping and Handling Costs: The Company does not generally charge customers separately for shipping and handling. Substantially all the costs the Company incurs to ship products to our stores are included in cost of sales.

Pre-opening Expenses: Pre-opening expenses, which consist primarily of payroll and occupancy costs, are expensed as incurred.

Earnings per Share: Basic earnings per share is based on the weighted average outstanding common shares. Diluted earnings per share is based on the weighted average outstanding common shares adjusted for the effect of common stock equivalents, which are primarily stock options. There were 8,600 stock options excluded from the diluted earnings per share computation that would have been anti-dilutive as of August 31, 2013. There were 30,000 options excluded for the year ended August 25, 2012, and no options excluded for the year ended August 27, 2011.

Share-Based Payments: Share-based payments include stock option grants and certain other transactions under the Company’s stock plans. The Company recognizes compensation expense for its share-based payments based on the fair value of the awards. See “Note B – Share-Based Payments” for further discussion.

Risk and Uncertainties: In fiscal 2013, one class of similar products accounted for 10 percent of the Company’s total revenues, and no vendor supplied more than 10 percent of the Company’s total purchases.

Recently Adopted Accounting Pronouncements: In August 2011, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2011-08, Intangibles – Goodwill and Other, which amends Accounting Standards Codification (“ASC”) Topic 350, Intangibles – Goodwill and Other. The purpose of ASU 2011-08 is to simplify how an entity tests goodwill for impairment. Entities will assess qualitative factors to determine whether it is more likely than not that a reporting unit’s fair value is less than its carrying value. In instances where the fair value is determined to be less than the carrying value, entities will perform the two-step quantitative goodwill impairment test. The Company adopted this standard effective August 31, 2013, and it had no impact on the consolidated financial statements.

Recently Issued Accounting Pronouncements: In July 2012, the FASB issued ASU 2012-02, Testing Indefinite-Lived Intangible Assets for Impairment. The purpose of ASU 2012-02 is to simplify how an entity tests for impairment of indefinite-lived intangible assets. Entities will assess qualitative factors to determine whether it is more likely than not that a long-lived intangible asset’s fair value is less than its carrying value. In instances where the fair value is determined to be less than the carrying value, entities will perform the two-step quantitative goodwill impairment test. The Company does not expect the provision of ASU 2012-02 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.

In February 2013, the FASB issued ASU 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. Under ASU 2013-02, an entity is required to provide information about the amounts reclassified out of accumulated other comprehensive income (“AOCI”) by component. In addition, an entity is required to present, either on the face of the financial statements or in the notes, significant amounts reclassified out of AOCI by the respective line items of net income, but only if the amount reclassified is required to be reclassified in its entirety in the same reporting period. For amounts that are not required to be reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures that provide additional details about those amounts. ASU 2013-02 does not change the current requirements for reporting net income or other comprehensive income in the financial statements. The Company 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.

47

In July 2013, the FASB issued ASU 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. Under ASU 2013-11, an entity is required to disclose a liability related to an unrecognized tax benefit as an offset against a deferred tax asset for a net operating loss carryforward, a similar tax loss or tax credit carryforward if certain criteria are met. In situations of a net operating loss carryforward, a similar tax loss or a tax credit carryforward is not available at the reporting date under the tax law of the jurisdiction or the tax law of the jurisdiction does not require, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit will be presented in the financial statements as a liability and will not be combined with deferred tax assets. The Company does not expect the provision of ASU 2013-11 to have a material impact on its consolidated financial statements. This update will be effective for the Company at the beginning of its fiscal 2015 year.

Note B – Share-Based Payments

Total share-based compensation expense (a component of Operating, selling, general and administrative expenses) was $37.3 million for fiscal 2013, $33.4 million for fiscal 2012, and $26.6 million for fiscal 2011. As of August 31, 2013, share-based compensation expense for unvested awards not yet recognized in earnings is $25.9 million and will be recognized over a weighted average period of 2.5 years. Tax deductions in excess of recognized compensation cost are classified as a financing cash inflow.

On December 15, 2010, the Company’s stockholders approved the 2011 Equity Incentive Award Plan (the “2011 Plan”), allowing the Company to provide equity-based compensation to non-employee directors and employees for their service to AutoZone or its subsidiaries or affiliates. Under the 2011 Plan, participants may receive equity-based compensation in the form of stock options, stock appreciation rights, restricted stock, restricted stock units, dividend equivalents, deferred stock, stock payments, performance share awards and other incentive awards structured by the Board and the Compensation Committee of the Board. Prior to the Company’s adoption of the 2011 Plan, equity-based compensation was provided to employees under the 2006 Stock Option Plan and to non-employee directors under the 2003 Director Compensation Plan (the “2003 Comp Plan”) and the 2003 Director Stock Option Plan (the “2003 Option Plan”).

The Company grants options to purchase common stock to certain of its employees under its plan at prices equal to the market value of the stock on the date of grant. Options have a term of 10 years or 10 years and one day from grant date. Employee options generally vest in equal annual installments on the first, second, third and fourth anniversaries of the grant date and generally have 30 or 90 days after the service relationship ends, or one year after death, to exercise all vested options. The fair value of each option grant is separately estimated for each vesting date. The fair value of each option is amortized into compensation expense on a straight-line basis between the grant date for the award and each vesting date.

In addition to the 2011 Plan, on December 15, 2010, the Company adopted the 2011 Director Compensation Program (the “2011 Program”), which states that non-employee directors will receive their compensation in awards of restricted stock units under the 2011 Plan. Under the 2011 Program, restricted stock units are granted the first day of each calendar quarter. The number of restricted stock units granted each quarter is determined by dividing one-fourth of the amount of the annual retainer by the fair market value of the shares of common stock as of the grant date. The restricted stock units are fully vested on the date they are issued and are paid in shares of the Company’s common stock subsequent to the non-employee director ceasing to be a member of the Board.

The 2011 Program replaced the 2003 Comp Plan and the 2003 Option Plan. Under the 2003 Comp Plan, non-employee directors could receive no more than one-half of their director fees immediately in cash, and the remainder of the fees was required to be taken in common stock or stock appreciation rights. The director had the option to elect to receive up to 100% of the fees in stock or defer all or part of the fees in units with value equivalent to the value of shares of common stock as of the grant date. At August 31, 2013, the Company has $7.6 million accrued related to 17,990 outstanding units issued under the 2003 Comp Plan and prior plans, and there was $6.7 million accrued related to 18,241 outstanding units issued as of August 25, 2012. No additional shares of stock or units will be issued in future years under the 2003 Comp Plan.

48

Under the 2003 Option Plan, each non-employee director received an option grant on January 1 of each year, and each new non-employee director received an option to purchase 3,000 shares upon election to the Board, plus a portion of the annual directors’ option grant prorated for the portion of the year actually served. These stock option grants were made at the fair market value as of the grant date and generally vested three years from the grant date. There were 51,000 and 104,679 outstanding options under the 2003 Option Plan as of August 31, 2013 and August 25, 2012, respectively. No additional shares of stock or units will be issued in future years under the 2003 Option Plan.

The Company has estimated the fair value of all stock option awards as of the date of the grant by applying the Black-Scholes-Merton multiple-option pricing valuation model. The application of this valuation model involves assumptions that are judgmental and highly sensitive in the determination of compensation expense. The following table presents the weighted average for key assumptions used in determining the fair value of options granted and the related share-based compensation expense:

	Year Ended
	August 31, 2013			August 25, 2012			August 27, 2011
Expected price volatility		29	%		28	%		31	%
Risk-free interest rates		0.5	%		0.7	%		1.0	%
Weighted average expected lives (in years)		5.2			5.4			4.3
Forfeiture rate		10	%		10	%		10	%
Dividend yield		0	%		0	%		0	%

The following methodologies were applied in developing the assumptions used in determining the fair value of options granted:

Expected price volatility – This is a measure of the amount by which a price has fluctuated or is expected to fluctuate. The Company uses actual historical changes in the market value of its stock to calculate the volatility assumption as it is management’s belief that this is the best indicator of future volatility. The Company calculates daily market value changes from the date of grant over a past period representative of the expected life of the options to determine volatility. An increase in the expected volatility will increase compensation expense.

Risk-free interest rate – This is the U.S. Treasury rate for the week of the grant having a term equal to the expected life of the option. An increase in the risk-free interest rate will increase compensation expense.

Expected lives – This is the period of time over which the options granted are expected to remain outstanding and is based on historical experience. Separate groups of employees that have similar historical exercise behavior are considered separately for valuation purposes. Options granted have a maximum term of ten years or ten years and one day. An increase in the expected life will increase compensation expense.

Forfeiture rate – This is the estimated percentage of options granted that are expected to be forfeited or canceled before becoming fully vested. This estimate is based on historical experience at the time of valuation and reduces expense ratably over the vesting period. An increase in the forfeiture rate will decrease compensation expense. This estimate is evaluated periodically based on the extent to which actual forfeitures differ, or are expected to differ, from the previous estimate.

Dividend yield – The Company has not made any dividend payments nor does it have plans to pay dividends in the foreseeable future. An increase in the dividend yield will decrease compensation expense.

The weighted average grant date fair value of options granted was $98.58 during fiscal 2013, $94.71 during fiscal 2012, and $58.57 during fiscal 2011. The intrinsic value of options exercised was $194.6 million in fiscal 2013, $176.5 million in fiscal 2012, and $100.0 million in fiscal 2011. The total fair value of options vested was $37.3 million in fiscal 2013, $32.6 million in fiscal 2012, and $20.7 million in fiscal 2011.

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The Company generally issues new shares when options are exercised. The following table summarizes information about stock option activity for the year ended August 31, 2013:

	Number of Shares			Weighted Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in thousands)
Outstanding – August 25, 2012		2,262,679		$	173.01
Granted		364,160			371.76
Exercised		(773,942	)		128.68
Cancelled		(56,909	)		282.28
Outstanding – August 31, 2013		1,795,988			228.95		6.56	$	343,015
Exercisable		899,079			152.35		5.05		240,584
Expected to vest		896,909			305.74		8.07		92,187
Available for future grants		2,085,615

The Company recognized $1.5 million in expense related to the discount on the selling of shares to employees and executives under various share purchase plans in fiscal 2013, $1.5 million in fiscal 2012 and $1.4 million in fiscal 2011. The Sixth Amended and Restated AutoZone, Inc. Employee Stock Purchase Plan (the “Employee Plan”), which is qualified under Section 423 of the Internal Revenue Code, permits all eligible employees to purchase AutoZone’s common stock at 85% of the lower of the market price of the common stock on the first day or last day of each calendar quarter through payroll deductions. Maximum permitted annual purchases are $15,000 per employee or 10 percent of compensation, whichever is less. Under the Employee Plan, 18,228 shares were sold to employees in fiscal 2013, 19,403 shares were sold to employees in fiscal 2012, and 21,608 shares were sold to employees in fiscal 2011. The Company repurchased 22,915 shares at fair value in fiscal 2013, 24,113 shares at fair value in fiscal 2012, and 30,864 shares at fair value in fiscal 2011 from employees electing to sell their stock. Issuances of shares under the Employee Plan are netted against repurchases and such repurchases are not included in share repurchases disclosed in “Note K – Stock Repurchase Program.” At August 31, 2013, 234,744 shares of common stock were reserved for future issuance under the Employee Plan.

Once executives have reached the maximum purchases under the Employee Plan, the Fifth Amended and Restated Executive Stock Purchase Plan (the “Executive Plan”) permits all eligible executives to purchase AutoZone’s common stock up to 25 percent of his or her annual salary and bonus. Purchases under the Executive Plan were 3,454 shares in fiscal 2013, 3,937 shares in fiscal 2012, and 1,719 shares in fiscal 2011. At August 31, 2013, 248,953 shares of common stock were reserved for future issuance under the Executive Plan.

Note C – Accrued Expenses and Other

Accrued expenses and other consisted of the following:

(in thousands)	August 31, 2013		August 25, 2012
Medical and casualty insurance claims (current portion)	$	66,133	$	63,484
Accrued compensation, related payroll taxes and benefits		137,165		151,669
Property, sales, and other taxes		90,944		97,542
Accrued interest		40,442		39,220
Accrued gift cards		32,160		29,060
Accrued sales and warranty returns		14,171		17,276
Capital lease obligations		32,246		29,842
Other		54,570		49,992
	$	467,831	$	478,085

The Company retains a significant portion of the insurance risks associated with workers’ compensation, employee health, general, products liability, property and vehicle insurance. A portion of these self-insured losses

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is managed through a wholly owned insurance captive. The Company maintains certain levels for stop-loss coverage for each self-insured plan in order to limit its liability for large claims. The limits are per claim and are $1.5 million for workers’ compensation and property, $0.5 million for employee health, and $1.0 million for general, products liability, and vehicle.

Note D – Income Taxes

The components of income from continuing operations before income taxes are as follows:

	Year Ended
(in thousands)	August 31, 2013		August 25, 2012		August 27, 2011
Domestic	$	1,486,386	$	1,373,142	$	1,255,127
International		101,297		79,844		69,119
	$	1,587,683	$	1,452,986	$	1,324,246

The provision for income tax expense consisted of the following:

	Year Ended
(in thousands)	August 31, 2013			August 25, 2012			August 27, 2011
Current:
Federal	$	466,803		$	424,895		$	364,117
State		46,494			47,386			39,473
International		38,202			24,775			27,015
		551,499			497,056			430,605
Deferred:
Federal		16,816			33,679			57,625
State		3,139			(2,822	)		(5,031	)
International		(251	)		(5,300	)		(7,927	)
		19,704			25,557			44,667
Income tax expense	$	571,203		$	522,613		$	475,272

A reconciliation of the provision for income taxes to the amount computed by applying the federal statutory tax rate of 35% to income before income taxes is as follows:

	Year Ended
(in thousands)	August 31, 2013			August 25, 2012			August 27, 2011
Federal tax at statutory U.S. income tax rate		35.0	%		35.0	%		35.0	%
State income taxes, net		2.0	%		2.0	%		1.7	%
Other		(1.0	%)		(1.0	%)		(0.8	%)
Effective tax rate		36.0	%		36.0	%		35.9	%

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Significant components of the Company’s deferred tax assets and liabilities were as follows:

(in thousands)	August 31, 2013			August 25, 2012
Deferred tax assets:
Net operating loss and credit carryforwards	$	41,785		$	36,605
Insurance reserves		16,237			18,185
Accrued benefits		67,350			63,320
Pension		18,004			43,904
Other		45,597			41,658
Total deferred tax assets		188,973			203,672
Less: Valuation allowances		(11,593	)		(9,532	)
		177,380			194,140
Deferred tax liabilities:
Property and equipment		(84,512	)		(67,480	)
Inventory		(262,653	)		(244,414	)
Other		(27,341	)		(31,437	)
Total deferred tax liabilities		(374,506	)		(343,331	)
Net deferred tax liability	$	(197,126	)	$	(149,191	)

Deferred taxes are not provided for temporary differences of approximately $260.0 million at August 31, 2013, and $195.8 million at August 25, 2012, representing earnings of non-U.S. subsidiaries that are intended to be permanently reinvested. Computation of the potential deferred tax liability associated with these undistributed earnings and other basis differences is not practicable.

At August 31, 2013 and August 25, 2012, the Company had deferred tax assets of $8.7 million and $12.3 million, respectively, from net operating loss (“NOL”) carryforwards available to reduce future taxable income totaling approximately $75.5 million and $76.6 million, respectively. Certain NOLs have no expiration date and others will expire, if not utilized, in various years from fiscal 2014 through 2032. At August 31, 2013 and August 25, 2012, the Company had deferred tax assets for income tax credit carryforwards of $33.1 million and $24.3 million, respectively. Certain income tax credit carryforwards have no expiration and others will expire, if not utilized, in various years from fiscal 2014 through 2027.

At August 31, 2013 and August 25, 2012, the Company had a valuation allowance of $11.6 million and $9.5 million, respectively, on deferred tax assets associated with NOL and tax credit carryforwards for which management has determined it is more likely than not that the deferred tax asset will not be realized. The $2.1 million net increase in the valuation allowance during fiscal 2013 related to increases from certain NOLs and tax credits arising in fiscal 2013 and decreases due to NOL expirations. Management believes it is more likely than not that the remaining deferred tax assets will be fully realized.

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:

(in thousands)	August 31, 2013			August 25, 2012
Beginning balance	$	27,715		$	29,906
Additions based on tax positions related to the current year		7,015			6,869
Additions for tax positions of prior years		2,758			44
Reductions for tax positions of prior years		(470	)		(1,687	)
Reductions due to settlements		(3,019	)		(4,586	)
Reductions due to statute of limitations		(3,356	)		(2,831	)
Ending balance	$	30,643		$	27,715

Included in the August 31, 2013 balance is $20.1 million of unrecognized tax benefits that, if recognized, would reduce the Company’s effective tax rate.

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The Company accrues interest on unrecognized tax benefits as a component of income tax expense. Penalties, if incurred, would be recognized as a component of income tax expense. The Company had $4.7 million and $4.1 million accrued for the payment of interest and penalties associated with unrecognized tax benefits at August 31, 2013 and August 25, 2012, respectively.

The Company files U.S. federal, U.S. state and local, and international income tax returns. The U.S. Internal Revenue Service has completed exams on U.S. federal income tax returns for years 2009 and prior. With few exceptions, the Company is no longer subject to state and local or non-U.S. examinations by tax authorities for years before 2009. The Company is typically engaged in various tax examinations at any given time, both by U.S. federal, state and local, and international taxing jurisdictions. As of August 31, 2013, the Company estimates that the amount of unrecognized tax benefits could be reduced by approximately $1.5 million over the next twelve months as a result of tax audit settlements. While the Company believes that it is adequately accrued for possible audit adjustments, the final resolution of these examinations cannot be determined at this time and could result in final settlements that differ from current estimates.

Note E – Fair Value Measurements

The Company has adopted ASC Topic 820, Fair Value Measurement, which defines fair value, establishes a framework for measuring fair value in generally accepted accounting principles (“GAAP”) and expands disclosure requirements about fair value measurements. This standard 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. ASC Topic 820 establishes a framework for measuring fair value by creating a hierarchy of valuation inputs used to measure fair value, and although it does not require additional fair value measurements, it applies to other accounting pronouncements that require or permit fair value measurements.

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.

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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:

	August 31, 2013
(in thousands)	Level 1		Level 2		Level 3			Fair Value
Other current assets	$	16,386	$	24	$	—		$	16,410
Other long-term assets		49,011		16,740		—			65,751
	$	65,397	$	16,764	$	—		$	82,161
Contingent consideration	$	—	$	—	$	(242	)	$	(242	)

	August 25, 2012
(in thousands)	Level 1		Level 2			Level 3		Fair Value
Other current assets	$	22,515	$	—		$	—	$	22,515
Other long-term assets		40,424		13,275			—		53,699
	$	62,939	$	13,275		$	—	$	76,214
Accrued expenses and other	$	—	$	(4,915	)	$	—	$	(4,915	)

At August 31, 2013, the fair value measurement amounts for assets and liabilities recorded in the accompanying Consolidated Balance Sheet consisted of short-term marketable securities of $16.4 million, which are included within Other current assets and long-term marketable securities of $65.8 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. A discussion on how the Company’s cash flow hedges are valued is included in “Note H – Derivative Financial Instruments,” while the fair value of the Company’s pension plan assets are disclosed in “Note L – Pension and Savings Plans.”

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. 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 remeasurement 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.

During the fourth quarter of fiscal 2013, the Company determined AutoAnything is not likely to achieve the operating income targets necessary to earn the contingent consideration. Therefore, the contingent consideration was adjusted to reflect the fair value at August 31, 2013 of $0.2 million, resulting in a decrease to the contingent consideration liability of $23.3 million during the fourth quarter of fiscal 2013. As of August 31, 2013, the contingent liability is reflected as a current liability of $0.1 million in Accrued expenses and other and a non-current liability of $0.1 million in Other long-term liabilities in the accompanying Consolidated Balance Sheet. A discussion of the acquisition is included in “Note M – Acquisition.”

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The change in the fair value of the contingent consideration liability is summarized as follows:

(in thousands)	Fiscal Year Ended August 31, 2013
Fair value – beginning of period	$	—
Fair value of contingent consideration issued during the period		(22,678	)
Change in fair value		22,436
Fair value – end of period	$	(242	)

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

Non-financial assets are required to be measured at fair value on a non-recurring basis in certain circumstances, including the event of impairment. The assets could include assets acquired in an acquisition as well as property, plant and equipment that are determined to be impaired. During the fourth quarter of fiscal 2013, the Company recorded a goodwill impairment charge of $18.3 million related to the acquisition of AutoAnything and an impairment charge of $4.1 million of AutoAnything’s trade name in order to record these assets at fair value. The fair value remeasurements are based on significant inputs not observable in the market and thus represent a Level 3 measurement as defined in the fair value hierarchy. See “Note N – Goodwill and Intangibles” for further discussion. During fiscal 2013 and fiscal 2012, the Company did not have any other 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. The fair value of the Company’s debt is disclosed in “Note I – Financing.”

Note F – 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:

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

	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 August 31, 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 sale of marketable securities during fiscal 2013, fiscal 2012, or fiscal 2011.

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The Company holds 45 securities that are in an unrealized loss position of approximately $277 thousand at August 31, 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 its intent and ability to hold the investments until maturity or until recovery of fair value.

Note G – 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, net of tax, consisted of the following:

(in thousands)	Pension Liability			Foreign Currency (1)			Unrealized Gain on Securities			Derivatives			Total
Balance at August 27, 2011	$	(76,705	)	$	(36,401	)	$	479		$	(7,064	)	$	(119,691	)
Fiscal 2012 activity		(17,262	)		(13,866	)		(128	)		(1,066	)		(32,322	)
Balance at August 25, 2012		(93,967	)		(50,267	)		351			(8,130	)		(152,013	)
Fiscal 2013 activity		43,106			(12,216	)		(376	)		711			31,225
Balance at August 31, 2013	$	(50,861	)	$	(62,483	)	$	(25	)	$	(7,419	)	$	(120,788	)

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

The fiscal 2013 pension adjustment of $43.1 million reflects actuarial gains not yet reflected in periodic pension cost primarily driven by a higher discount rate at August 31, 2013.

Note H – Derivative Financial Instruments

The Company periodically uses derivatives to hedge exposures to interest rates. The Company does not hold or issue financial instruments for trading purposes. For transactions that meet the hedge accounting criteria, the Company formally designates and documents the instrument as a hedge at inception and quarterly thereafter assesses the hedges to ensure they are effective in offsetting changes in the cash flows of the underlying exposures. Derivatives are recorded in the Company’s Consolidated Balance Sheet at fair value, determined using available market information or other appropriate valuation methodologies. In accordance with ASC Topic 815, Derivatives and Hedging, the effective portion of a financial instrument’s change in fair value is recorded in Accumulated other comprehensive loss for derivatives that qualify as cash flow hedges and any ineffective portion of an instrument’s change in fair value is recognized in earnings.

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

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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 August 31, 2013, the Company had $11.8 million recorded in Accumulated other comprehensive loss related to net 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 fiscal year ended August 31, 2013, the Company reclassified $1.3 million of net losses from Accumulated other comprehensive loss to Interest expense. In the fiscal year ended August 25, 2012, the Company reclassified $1.9 million of net losses from Accumulated other comprehensive loss to Interest expense. The Company expects to reclassify $182 thousand of net losses from Accumulated other comprehensive loss to Interest expense over the next 12 months.

Note I – Financing

The Company’s debt consisted of the following:

(in thousands)	August 31, 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
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		—
3.125% Senior Notes due July 2023, effective interest rate of 3.26%		500,000		—
Commercial paper, weighted average interest rate of 0.29% and 0.42% at August 31, 2013 and August 25, 2012, respectively		637,000		513,402
Unsecured, peso denominated borrowings, weighted average interest rate of 4.57% at August 25, 2012		—		4,781
Total debt		4,187,000		3,768,183
Less: Short-term borrowings		173,733		49,881
Long-term debt	$	4,013,267	$	3,718,302

As of August 31, 2013, $637 million of commercial paper borrowings and $326.3 million of the 6.500% Senior Notes due January 2014 are classified as long-term in the accompanying Consolidated Balance Sheets as the Company has the ability and intent to refinance on a long-term basis through available capacity in its revolving credit facility. As of August 31, 2013, the Company had $963.3 million of availability under its $1.0 billion revolving credit facility, expiring in September 2016 that would allow it to replace these short-term obligations with long-term financing.

In September 2011, the Company amended and restated its $800 million revolving credit facility, which was scheduled to expire in July 2012. The capacity under the revolving credit facility was increased 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.

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The revolving credit facility agreement requires that the Company’s consolidated interest coverage ratio as of the last day of each quarter shall be no less than 2.50:1. This ratio is defined as the ratio of (i) consolidated earnings before interest, taxes and rents to (ii) consolidated interest expense plus consolidated rents. The Company’s consolidated interest coverage ratio as of August 31, 2013 was 4.68:1.

In addition to the revolving credit facility, the Company also maintains a letter of credit facility that allows it to request the participating bank to issue letters of credit on its behalf up to an aggregate amount of $100 million. As of August 31, 2013, the Company has $99.4 million in letters of credit outstanding under the letter of credit facility, which expires in June 2016.

In addition to the outstanding letters of credit issued under the committed facilities discussed above, the Company had $41.8 million in letters of credit outstanding as of August 31, 2013. These letters of credit have various maturity dates and were issued on an uncommitted basis.

On April 29, 2013, the Company issued $500 million in 3.125% Senior Notes due July 2023 under its shelf registration statement filed with the SEC on April 17, 2012 (the “Shelf Registration”). The Shelf Registration allows the Company to sell an indeterminate amount in debt securities to fund general corporate purposes, including repaying, redeeming or repurchasing outstanding debt and for working capital, capital expenditures, new store openings, stock repurchases and acquisitions. Proceeds from the debt issuance on April 29, 2013, were used to repay a portion of the outstanding commercial paper borrowings and for general corporate purposes. The Company used commercial paper borrowings to repay the $200 million in 4.375% Senior Notes due June 2013.

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

On April 24, 2012, the Company issued $500 million in 3.700% Senior Notes due April 2022 under its Shelf Registration. The Company used the proceeds from the issuance of debt to repay a portion of the commercial paper borrowings and for general corporate purposes.

The 5.750% Senior Notes issued in July 2009 and the 6.500% and 7.125% Senior Notes issued during August 2008, (collectively, the “Notes”), are subject to an interest rate adjustment if the debt ratings assigned to the Notes are downgraded. The Notes, along with the 3.125% Senior Notes issued in April 2013, 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 during November 2010, also contain a provision that repayment of the notes may be accelerated if the Company experiences a change in control (as defined in the agreements). The Company’s borrowings under its other senior notes contain minimal covenants, primarily restrictions on liens. Under the revolving credit facility, covenants include limitations on total indebtedness, restrictions on liens, a maximum debt to earnings ratio, and a change of control provision that may require acceleration of the repayment obligations under certain circumstances. These covenants are in addition to the consolidated interest coverage ratio discussed above. All of the repayment obligations under the borrowing arrangements may be accelerated and come due prior to the scheduled payment date if covenants are breached or an event of default occurs.

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As of August 31, 2013, the Company was in compliance with all covenants related to its borrowing arrangements. All of the Company’s debt is unsecured. Scheduled maturities of long-term debt are as follows:

(in thousands)	Scheduled Maturities
2014	$	963,267
2015		500,000
2016		500,000
2017		—
2018		250,000
Thereafter		1,800,000
	$	4,013,267

The fair value of the Company’s debt was estimated at $4.259 billion as of August 31, 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 $72.2 million at August 31, 2013 and $286.6 million at August 25, 2012.

Note J – Interest Expense

Net interest expense consisted of the following:

	Year Ended
(in thousands)	August 31, 2013			August 25, 2012			August 27, 2011
Interest expense	$	188,324		$	178,547		$	173,674
Interest income		(1,606	)		(1,397	)		(2,058	)
Capitalized interest		(1,303	)		(1,245	)		(1,059	)
	$	185,415		$	175,905		$	170,557

Note K – Stock Repurchase Program

During 1998, the Company announced a program permitting the Company to repurchase a portion of its outstanding shares not to exceed a dollar maximum established by the Board. The program was last amended on June 11, 2013 to increase the repurchase authorization to $13.40 billion from $12.65 billion. From January 1998 to August 31, 2013, the Company has repurchased a total of 134.6 million shares at an aggregate cost of $12.93 billion.

The Company’s share repurchase activity consisted of the following:

	Year Ended
(in thousands)	August 31, 2013		August 25, 2012		August 27, 2011
Amount	$	1,387,315	$	1,362,869	$	1,466,802
Shares		3,511		3,795		5,598

During the fiscal year 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.

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Subsequent to August 31, 2013, the Company has repurchased 355,150 shares of common stock at an aggregate cost of $149.8 million.

Note L – Pension and Savings Plans

Prior to January 1, 2003, substantially all full-time employees were covered by a defined benefit pension plan. The benefits under the plan were based on years of service and the employee’s highest consecutive five-year average compensation. On January 1, 2003, the plan was frozen. Accordingly, pension plan participants will earn no new benefits under the plan formula and no new participants will join the pension plan.

On January 1, 2003, the Company’s supplemental defined benefit pension plan for certain highly compensated employees was also frozen. Accordingly, plan participants will earn no new benefits under the plan formula and no new participants will join the pension plan.

The Company has recognized the unfunded status of the defined pension plans in its Consolidated Balance Sheets, which represents the difference between the fair value of pension plan assets and the projected benefit obligations of its defined benefit pension plans. The net unrecognized actuarial losses and unrecognized prior service costs are recorded in Accumulated other comprehensive loss. These amounts will be subsequently recognized as net periodic pension expense pursuant to the Company’s historical accounting policy for amortizing such amounts. Further, actuarial gains and losses that arise in subsequent periods and are not recognized as net periodic pension expense in the same periods will be recognized as a component of other comprehensive income. Those amounts will be subsequently recognized as a component of net periodic pension expense on the same basis as the amounts previously recognized in Accumulated other comprehensive loss.

The Company’s investment strategy for pension plan assets is to utilize a diversified mix of domestic and international equity and fixed income portfolios to earn a long-term investment return that meets the Company’s pension plan obligations. The pension plan assets are invested primarily in listed securities, and the pension plans hold only a minimal investment in AutoZone common stock that is entirely at the discretion of third-party pension fund investment managers. The Company’s largest holding classes, fixed income bonds and U.S. equities, are invested with a fund manager that holds diversified portfolios. Accordingly, the Company does not have any significant concentrations of risk in particular securities, issuers, sectors, industries or geographic regions. Alternative investment strategies, are in the process of being liquidated and constitute less than 1% of the pension plan assets. The Company’s investment managers are prohibited from using derivatives for speculative purposes and are not permitted to use derivatives to leverage a portfolio.

The following is a description of the valuation methodologies used for the Company’s investments measured at fair value:

U.S., international, emerging, and high yield equities – These investments are commingled funds and are valued using the net asset values, which are determined by valuing investments at the closing price or last trade reported on the major market on which the individual securities are traded. These investments are subject to annual audits.

Alternative investments – This category represents a hedge fund of funds made up of 9 different hedge fund managers diversified over 4 different hedge strategies. The fair value of the hedge fund of funds is determined using valuations provided by the third party administrator for each of the underlying funds.

Fixed income securities – The fair values of corporate, U.S. government securities and other fixed income securities are estimated by using bid evaluation pricing models or quoted prices of securities with similar characteristics.

Cash and cash equivalents – These investments include cash equivalents valued using exchange rates provided by an industry pricing vendor and commingled funds valued using the net asset value. These investments also include cash.

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The fair values of investments by level and asset category and the weighted-average asset allocations of the Company’s pension plans at the measurement date are presented in the following table:

August 31, 2013
	Fair Value		Asset Allocation						Fair Value Hierarchy
(in thousands)			Actual			Target			Level 1		Level 2		Level 3
U.S. equities	$	57,931		27.9	%		30.0	%	$	—	$	57,931	$	—
International equities		38,145		18.3			20.0			—		38,145		—
Emerging equities		19,030		9.1			10.0			—		19,030		—
High yield equities		19,858		9.5			10.0			—		19,858		—
Alternative investments		1,226		0.6			—			—		—		1,226
Fixed income securities		59,500		28.6			30.0			—		59,500		—
Cash and cash equivalents		12,430		6.0			—			—		12,430		—
	$	208,120		100.0	%		100.0	%	$	—	$	206,894	$	1,226

August 25, 2012
	Fair Value		Asset Allocation						Fair Value Hierarchy
(in thousands)			Actual			Target			Level 1		Level 2		Level 3
U.S. equities	$	51,101		28.2	%		30.0	%	$	—	$	51,101	$	—
International equities		31,767		17.5			20.0			—		31,767		—
Emerging equities		16,471		9.1			10.0			—		16,471		—
High yield equities		17,378		9.6			10.0			—		17,378		—
Alternative investments		2,404		1.3			—			—		—		2,404
Fixed income securities		47,667		26.3			30.0			—		47,667		—
Cash and cash equivalents		14,621		8.0			—			—		14,621		—
	$	181,409		100.0	%		100.0	%	$	—	$	179,005	$	2,404

The asset allocations in the charts above include $11.0 million and $8.7 million in cash contributions made prior to the balance sheet date of August 31, 2013, and August 25, 2012, respectively. Subsequent to August 31, 2013, and August 25, 2012, these cash contributions were allocated to the pension plan investments in accordance with the targeted asset allocation.

In August 2011, the Company’s Investment Committee approved a revised asset allocation target for the investments held by the pension plan. Based on the revised asset allocation target, the expected long-term rate of return on plan assets changed from 8.0% in fiscal 2011 to 7.5% for the years ending August 25, 2012, and August 31, 2013.

The change in fair value of Level 3 assets that use significant unobservable inputs is presented in the following table:

(in thousands)	Level 3 Assets
Beginning balance – August 25, 2012	$	2,404
Actual return on plan assets:
Assets held at August 31, 2013		60
Assets sold during the year		72
Sales and settlements		(1,310	)
Ending balance – August 31, 2013	$	1,226

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The following table sets forth the plans’ funded status and amounts recognized in the Company’s Consolidated Balance Sheets:

(in thousands)	August 31, 2013			August 25, 2012
Change in Projected Benefit Obligation:
Projected benefit obligation at beginning of year	$	305,206		$	241,645
Interest cost		11,746			12,214
Actuarial (gains) losses		(53,756	)		56,749
Benefits paid		(6,416	)		(5,402	)
Benefit obligations at end of year	$	256,780		$	305,206
Change in Plan Assets:
Fair value of plan assets at beginning of year	$	181,409		$	156,883
Actual return on plan assets		16,218			14,505
Employer contributions		16,909			15,423
Benefits paid		(6,416	)		(5,402	)
Fair value of plan assets at end of year	$	208,120		$	181,409
Amount Recognized in the Statement of Financial Position:
Current liabilities	$	(124	)	$	(30	)
Long-term liabilities		(48,536	)		(123,767	)
Net amount recognized	$	(48,660	)	$	(123,797	)
Amount Recognized in Accumulated Other Comprehensive Loss and not yet reflected in Net Periodic Benefit Cost:
Net actuarial loss	$	(83,601	)	$	(154,678	)
Accumulated other comprehensive loss	$	(83,601	)	$	(154,678	)
Amount Recognized in Accumulated Other Comprehensive Loss and not yet reflected in Net Periodic Benefit Cost and expected to be amortized in next year’s Net Periodic Benefit Cost:
Net actuarial loss	$	(6,879	)	$	(14,721	)
Amount recognized	$	(6,879	)	$	(14,721	)

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Net periodic benefit expense consisted of the following:

	Year Ended
(in thousands)	August 31, 2013			August 25, 2012			August 27, 2011
Interest cost	$	11,746		$	12,214		$	11,135
Expected return on plan assets		(13,617	)		(11,718	)		(9,326	)
Amortization of prior service cost		—			—			—
Recognized net actuarial losses		14,721			9,795			9,405
Net periodic benefit expense	$	12,850		$	10,291		$	11,214

The actuarial assumptions used in determining the projected benefit obligation include the following:

	Year Ended
	August 31, 2013			August 25, 2012			August 27, 2011
Weighted average discount rate		5.19	%		3.90	%		5.13	%
Expected long-term rate of return on plan assets		7.50	%		7.50	%		8.00	%

As the plan benefits are frozen, increases in future compensation levels no longer impact the calculation and there is no service cost. The discount rate is determined as of the measurement date and is based on the calculated yield of a portfolio of high-grade corporate bonds with cash flows that generally match the Company’s expected benefit payments in future years. The expected long-term rate of return on plan assets is based on the historical relationships between the investment classes and the capital markets, updated for current conditions.

The Company makes annual contributions in amounts at least equal to the minimum funding requirements of the Employee Retirement Income Security Act of 1974. The Company contributed $16.9 million to the plans in fiscal 2013, $15.4 million to the plans in fiscal 2012 and $34.1 million to the plans in fiscal 2011. The Company expects to contribute approximately $4 million to the plans in fiscal 2014; however, a change to the expected cash funding may be impacted by a change in interest rates or a change in the actual or expected return on plan assets.

Based on current assumptions about future events, benefit payments are expected to be paid as follows for each of the following fiscal years. Actual benefit payments may vary significantly from the following estimates:

(in thousands)	Benefit Payments
2014	$	9,125
2015		9,205
2016		9,912
2017		10,604
2018		11,193
2019 – 2023		65,396

The Company has a 401(k) plan that covers all domestic employees who meet the plan’s participation requirements. The plan features include Company matching contributions, immediate 100% vesting of Company contributions and a savings option up to 25% of qualified earnings. The Company makes matching contributions, per pay period, up to a specified percentage of employees’ contributions as approved by the Board. The Company made matching contributions to employee accounts in connection with the 401(k) plan of $14.1 million in fiscal 2013, $14.4 million in fiscal 2012 and $13.3 million in fiscal 2011.

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Note M – 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, up to a $5 million holdback payment for working capital true-ups, and contingent payments not to exceed $30 million. During the third quarter of fiscal 2013, the Company paid the holdback payment for working capital true-ups of $1.1 million. With this acquisition, the Company expects to bolster its online presence in the 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 results of operations. The purchase price allocation resulted in goodwill of $83.4 million and intangible assets totaling $58.7 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.

During the fourth quarter of fiscal 2013, the Company determined AutoAnything is not likely to achieve the operating income targets necessary to earn the contingent consideration. Therefore, the contingent consideration was adjusted to reflect the fair value at August 31, 2013, of $0.2 million, resulting in a decrease in the contingent consideration liability of $23.3 million during the fourth quarter of fiscal 2013. See “Note E – Fair Value Measurements” for further discussion.

Note N – 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)		—		83,440			83,440
Goodwill adjustments (2)		—		(18,256	)		(18,256	)
Net balance as of August 31, 2013	$	302,645	$	65,184		$	367,829

(1) See Note M for discussion of the acquisition completed during the second quarter of fiscal 2013

(2) Total accumulated goodwill impairment as of August 31, 2013 is $18.3 million

The Company performed its annual impairment testing in the fourth quarter of fiscal 2013 for the recorded goodwill and indefinite-lived intangible asset related to the acquisition of AutoAnything. Based on an analysis of AutoAnything’s revised planned financial results compared to the initial projections, the Company determined it was more likely than not that the goodwill attributed to AutoAnything was impaired. Accordingly, the Company performed a goodwill impairment test by comparing the fair value of the reporting unit with its carrying amount, including goodwill. The Company uses the discounted cash flow methodology to determine fair value as it is considered to be the most reliable indicator of the fair values of the business. Because the fair value of the reporting unit was lower than its carrying value, the Company recorded a goodwill impairment charge of $18.3 million during the fourth quarter of fiscal 2013.

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The carrying amounts of intangible assets, which all relate to the AutoAnything acquisition, are included in Other long-term assets as follows:

(in thousands)	Estimated Useful Life		Gross Carrying Amount		Accumulated Amortization			Impairment			Net Carrying Amount
Technology		5 years	$	9,700	$	(1,365	)	$	—		$	8,335
Noncompete agreement		5 years		1,300		(183	)		—			1,117
Customer relationships		10 years		19,000		(1,336	)		—			17,664
Trade name		Indefinite		28,700		—			(4,100	)		24,600
			$	58,700	$	(2,884	)	$	(4,100	)	$	51,716

As part of its annual impairment test, the Company evaluated the AutoAnything trade name for impairment. Based on the Company’s evaluation of the future discounted cash flows of AutoAnything’s trade name as compared to its carrying value, it was determined that AutoAnything’s trade name was impaired. The Company recorded an impairment charge of $4.1 million during the fourth quarter of fiscal 2013 related to the trade name.

Amortization expense of intangible assets for the year ended August 31, 2013, was $2.9 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 August 31, 2013, is estimated as follows:

(in thousands)	Total
2014	$	4,100
2015		4,100
2016		4,100
2017		4,100
2018		2,553
Thereafter		8,163
	$	27,116

Note O – Leases

The Company leases some of its retail stores, distribution centers, facilities, land and equipment, including vehicles. Other than vehicle leases, most of the leases are operating leases, which include renewal options made at the Company’s election, options to purchase and provisions for percentage rent based on sales. Rental expense was $246.3 million in fiscal 2013, $229.4 million in fiscal 2012, and $213.8 million in fiscal 2011. Percentage rentals were insignificant.

The Company has a fleet of vehicles used for delivery to its commercial customers and stores and travel for members of field management. The majority of these vehicles are held under capital lease. At August 31, 2013, the Company had capital lease assets of $107.5 million, net of accumulated amortization of $44.8 million, and capital lease obligations of $106.2 million, of which $32.2 million is classified as Accrued expenses and other as it represents the current portion of these obligations. At August 25, 2012, the Company had capital lease assets of $104.2 million, net of accumulated amortization of $36.4 million, and capital lease obligations of $102.3 million, of which $29.8 million was classified as Accrued expenses and other.

The Company records rent for all operating leases on a straight-line basis over the lease term, including any reasonably assured renewal periods and the period of time prior to the lease term that the Company is in possession of the leased space for the purpose of installing leasehold improvements. Differences between recorded rent expense and cash payments are recorded as a liability in Accrued expenses and other and Other long-term liabilities in the accompanying Consolidated Balance Sheets, based on the terms of the lease. The deferred rent approximated $96.5 million on August 31, 2013, and $86.9 million on August 25, 2012.

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Future minimum annual rental commitments under non-cancelable operating leases and capital leases were as follows at the end of fiscal 2013:

(in thousands)	Operating Leases		Capital Leases
2014	$	228,747	$	32,246
2015		220,877		30,943
2016		204,112		24,363
2017		187,312		16,388
2018		170,745		5,283
Thereafter		945,429		—
Total minimum payments required	$	1,957,222		109,223
Less: Interest				(3,052	)
Present value of minimum capital lease payments			$	106,171

In connection with the Company’s December 2001 sale of the TruckPro business, the Company subleased some properties to the purchaser for an initial term of not less than 20 years. The Company’s remaining aggregate rental obligation at August 31, 2013 of $15.6 million is included in the above table, but the obligation is entirely offset by the sublease rental agreement.

Note P – Commitments and Contingencies

Construction commitments, primarily for new stores, totaled approximately $21.0 million at August 31, 2013.

The Company had $145.4 million in outstanding standby letters of credit and $30.7 million in surety bonds as of August 31, 2013, which all have expiration periods of less than one year. A substantial portion of the outstanding standby letters of credit (which are primarily renewed on an annual basis) and surety bonds are used to cover reimbursement obligations to our workers’ compensation carriers. There are no additional contingent liabilities associated with these instruments as the underlying liabilities are already reflected in the consolidated balance sheet. The standby letters of credit and surety bonds arrangements have automatic renewal clauses.

Note Q – 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 has contested any such assertions due to the existence of other entities/sources of contamination, some of which are 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.

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Note R – 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.

The Auto Parts Stores segment is a retailer and distributor of automotive parts and accessories through the Company’s 5,201 stores in the United States, Puerto Rico, Mexico and Brazil. Each store carries an extensive product line for cars, sport utility vehicles, vans and light trucks, including new and remanufactured automotive hard parts, maintenance items, accessories and non-automotive products.

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

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The Company evaluates its reportable segment primarily on the basis of net sales and segment profit, which is defined as gross profit. The following table shows segment results for the following fiscal years:

	Year Ended
(in thousands)	August 31, 2013			August 25, 2012			August 27, 2011
Net Sales:
Auto Parts Stores	$	8,858,723		$	8,422,559		$	7,906,692
Other		288,807			181,304			166,281
Total	$	9,147,530		$	8,603,863		$	8,072,973
Segment Profit:
Auto Parts Stores	$	4,568,190		$	4,292,474		$	3,989,852
Other		172,745			139,562			129,611
Gross profit		4,740,935			4,432,036			4,119,463
Operating, selling, general and administrative expenses		(2,967,837	)		(2,803,145	)		(2,624,660	)
Interest expense, net		(185,415	)		(175,905	)		(170,557	)
Income before income taxes	$	1,587,683		$	1,452,986		$	1,324,246
Segment Assets:
Auto Parts Stores	$	6,719,885		$	6,214,688		$	5,827,285
Other		172,204			50,951			42,317
Total	$	6,892,089		$	6,265,639		$	5,869,602
Capital Expenditures:
Auto Parts Stores	$	402,028		$	364,361		$	316,074
Other		12,423			13,693			5,530
Total	$	414,451		$	378,054		$	321,604
Auto Parts Stores Sales by Product Grouping:
Failure	$	4,214,642		$	3,793,963		$	3,530,497
Maintenance items		3,224,229			3,196,807			3,051,672
Discretionary		1,419,852			1,431,789			1,324,523
Auto Parts Stores net sales	$	8,858,723		$	8,422,559		$	7,906,692

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Note S – Quarterly Summary ⁽¹⁾

(Unaudited)

	Twelve Weeks Ended						Seventeen Weeks Ended
(in thousands, except per share data)	November 17, 2012		February 9, 2013		May 4, 2013		August 31, 2013 (2)
Net sales	$	1,991,040	$	1,855,198	$	2,205,878	$	3,095,414
Gross profit		1,031,866		961,981		1,142,713		1,604,376
Operating profit		363,276		317,571		456,030		636,220
Income before income taxes		322,172		276,248		413,939		575,324
Net income		203,452		176,247		265,583		371,199
Basic earnings per share		5.52		4.86		7.39		10.59
Diluted earnings per share		5.41		4.78		7.27		10.42

	Twelve Weeks Ended						Sixteen Weeks Ended
(in thousands, except per share data)	November 19, 2011		February 11, 2012		May 5, 2012		August 25, 2012 (2)
Net sales	$	1,924,341	$	1,804,069	$	2,111,866	$	2,763,585
Gross profit		983,627		926,215		1,089,799		1,432,394
Operating profit		340,934		300,651		427,250		560,056
Income before income taxes		301,840		261,728		387,507		501,911
Net income		191,125		166,930		248,586		323,733
Basic earnings per share		4.79		4.25		6.43		8.65
Diluted earnings per share		4.68		4.15		6.28		8.46

(1) The sum of quarterly amounts may not equal the annual amounts reported due to rounding. In addition, the earnings per share amounts are computed independently for each quarter while the full year is based on the annual weighted average shares outstanding.

(2) The fourth quarter for fiscal 2013 is based on a 17-week period while fiscal 2012 is based on a 16-week period. All other quarters presented are based on a 12-week period.

Item 9. Changes In and Disagreements with Accountants on Accounting and Financial Disclosure

Not applicable.

Item 9A. Controls and Procedures

As of August 31, 2013, an evaluation was performed under the supervision and with the participation of AutoZone’s management, including the Chief Executive Officer and the 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 the Chief Financial Officer, concluded that our disclosure controls and procedures were effective. During our fiscal fourth quarter ended August 31, 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 9B. Other Information

Not applicable.

69

PART III

Item 10. Directors, Executive Officers and Corporate Governance

The information set forth in Part I of this document in the section entitled “Executive Officers of the Registrant,” is incorporated herein by reference in response to this item. Additionally, the information contained in AutoZone, Inc.’s Proxy Statement dated October 28, 2013, in the sections entitled “Proposal 1 – Election of Directors” and “Section 16(a) Beneficial Ownership Reporting Compliance,” is incorporated herein by reference in response to this item.

The Company has adopted a Code of Ethical Conduct for Financial Executives that applies to its chief executive officer, chief financial officer, chief accounting officer and persons performing similar functions. The Company has filed a copy of this Code of Ethical Conduct as Exhibit 14.1 to this Form 10-K. The Company has also made the Code of Ethical Conduct available on its investor relations website at http://www.autozoneinc.com.

Item 11. Executive Compensation

The information contained in AutoZone, Inc.’s Proxy Statement dated October 28, 2013, in the section entitled “Executive Compensation,” is incorporated herein by reference in response to this item.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

The information contained in AutoZone, Inc.’s Proxy Statement dated October 28, 2013, in the sections entitled “Security Ownership of Management and Board of Directors” and “Security Ownership of Certain Beneficial Owners,” is incorporated herein by reference in response to this item.

Item 13. Certain Relationships and Related Transactions, and Director Independence

Not applicable.

Item 14. Principal Accounting Fees and Services

The information contained in AutoZone, Inc.’s Proxy Statement dated October 28, 2013, in the section entitled “Proposal 2 – Ratification of Independent Registered Public Accounting Firm,” is incorporated herein by reference in response to this item.

70

PART IV

Item 15. Exhibits, Financial Statement Schedules

The following information required under this item is filed as part of this report.

(a) Financial Statements

The following financial statements, related notes and reports of independent registered public accounting firm are filed with this Annual Report on Form 10-K in Part II, Item 8:

Reports of Independent Registered Public Accounting Firm

Consolidated Statements of Income for the fiscal years ended August 31, 2013, August 25, 2012, and August 27, 2011

Consolidated Statements of Comprehensive Income for the fiscal years ended August 31, 2013, August 25, 2012, and August 27, 2011

Consolidated Balance Sheets as of August 31, 2013, and August 25, 2012

Consolidated Statements of Cash Flows for the fiscal years ended August 31, 2013, August 25, 2012, and August 27, 2011

Consolidated Statements of Stockholders’ Deficit for the fiscal years ended August 31, 2013, August 25, 2012, and August 27, 2011

Notes to Consolidated Financial Statements

(b) Exhibits

The Exhibit Index following this document’s signature pages is incorporated herein by reference in response to this item.

(c) Financial Statement Schedules

Schedules are omitted because the information is not required or because the information required is included in the financial statements or notes thereto.

71

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) 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 C. RHODES, III
	William C. Rhodes, III
	Chairman, President and
	Chief Executive Officer
	(Principal Executive Officer)

Dated: October 28, 2013

72

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated:

SIGNATURE	TITLE	DATE
/s/ WILLIAM C. RHODES, III	Chairman, President and Chief Executive Officer (Principal Executive Officer)	October 28, 2013
William C. Rhodes, III
/s/ WILLIAM T. GILES William T. Giles	Chief Financial Officer and Executive Vice President – Finance, Information Technology and ALLDATA (Principal Financial Officer)	October 28, 2013
/s/ CHARLIE PLEAS, III	Senior Vice President and Controller (Principal Accounting Officer)	October 28, 2013
Charlie Pleas, III
/s/ DOUGLAS H. BROOKS	Director	October 28, 2013
Douglas H. Brooks
/s/ SUE E. GOVE	Director	October 28, 2013
Sue E. Gove
/s/ EARL G. GRAVES, JR.	Director	October 28, 2013
Earl G. Graves, Jr.
/s/ LINDA A. GOODSPEED	Director	October 28, 2013
Linda A. Goodspeed
/s/ ENDERSON GUIMARAES	Director	October 28, 2013
Enderson Guimaraes
/s/ J.R. HYDE, III	Director	October 28, 2013
J.R. Hyde, III
/s/ D. BRYAN JORDAN	Director	October 28, 2013
D. Bryan Jordan
/s/ W. ANDREW MCKENNA	Director	October 28, 2013
W. Andrew McKenna
/s/ GEORGE R. MRKONIC, JR.	Director	October 28, 2013
George R. Mrkonic, Jr.
/s/ LUIS P. NIETO	Director	October 28, 2013
Luis P. Nieto

73

EXHIBIT INDEX

The following exhibits are filed as part of this Annual Report on Form 10-K:

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	Indenture dated as of August 8, 2003, between AutoZone, Inc. and Bank One Trust Company, N.A. Incorporated by reference to Exhibit 4.1 to the Registration Statement on Form S-3 (No. 333-107828) filed August 11, 2003.
4.2	Terms Agreement dated May 29, 2003, by and among AutoZone, Inc., Citigroup Global Markets Inc. and SunTrust Capital Markets, Inc., as representatives of the several underwriters named therein. Incorporated by reference to Exhibit 1.2 to the Current Report on Form 8-K dated May 29, 2003.
4.3	Form of 5.5% Note due 2015. Incorporated by reference to Exhibit 4.2 to the Current Report on Form 8-K dated November 3, 2003.
4.4	Terms Agreement dated June 8, 2006, by and among AutoZone, Inc., Merrill Lynch, Pierce, Fenner & Smith Incorporated and J.P. Morgan Securities Inc., as representatives of the several underwriters named therein. Incorporated by reference to Exhibit 1.2 to the Current Report on Form 8-K dated June 13, 2006.
4.5	Form of 6.95% Senior Note due 2016. Incorporated by reference to Exhibit 4.1 to the Current Report on Form 8-K dated June 13, 2006.
4.6	Officers’ Certificate dated August 4, 2008, pursuant to Section 3.2 of the Indenture dated August 11, 2003, setting forth the terms of the 6.5% Senior Notes due 2014. Incorporated by reference to Exhibit 4.1 to the Current Report on Form 8-K dated August 4, 2008.
4.7	Form of 6.5% Senior Note due 2014. Incorporated by reference from the Current Report on Form 8-K dated August 4, 2008.
4.8	Officers’ Certificate dated August 4, 2008, pursuant to Section 3.2 of the Indenture dated August 11, 2003, setting forth the terms of the 7.125% Senior Notes due 2018. Incorporated by reference to Exhibit 4.2 to the Current Report on Form 8-K dated August 4, 2008.
4.9	Form of 7.125% Senior Note due 2018. Incorporated by reference from the Form 8-K dated August 4, 2008.
4.10	Officers’ Certificate dated July 2, 2009, pursuant to Section 3.2 of the Indenture dated August 11, 2003, setting forth the terms of the 5.75% Notes due 2015. Incorporated by reference to 4.1 to the Current Report on Form 8-K dated July 2, 2009.
4.11	Form of 5.75% Senior Note due 2015. Incorporated by reference from the Form 8-K dated July 2, 2009.
4.12	Officers’ Certificate dated November 15, 2010, pursuant to Section 3.2 of the Indenture dated August 8, 2003, setting forth the terms of the 4.000% Notes due 2020. Incorporated by reference to 4.1 to the Current Report on Form 8-K dated November 15, 2010.
4.13	Form of 4.000% Senior Note due 2020. Incorporated by reference from the Form 8-K dated November 15, 2010.

74

4.14	Officers’ Certificate dated April 24, 2012, pursuant to section 3.2 of the indenture dated August 8, 2003, setting forth the terms of the 3.700% Senior Notes due 2022. Incorporated by reference to Exhibit 4.1 to the Current Report on Form 8-K dated April 24, 2012.
4.15	Form of 3.700% Senior Notes due 2022. Incorporated by reference from the Form 8-K dated April 24, 2012.
4.16	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.
4.17	Form of 2.875% Senior Notes due 2023. Incorporated by reference from the Form 8-K dated November 13, 2012.
4.18	Officers’ Certificate dated April 29, 2013, pursuant to section 3.2 of the indenture dated August 8, 2003, setting forth the terms of the 3.125% Senior Notes due 2023. Incorporated by reference to Exhibit 4.1 to the Current Report on Form 8-K dated April 29, 2013.
4.19	Form of 3.125% Senior Notes due 2023. Incorporated by reference to Exhibit 4.1 to the Form 8-K dated April 29, 2013.
*10.1	Fourth Amended and Restated Director Stock Option Plan. Incorporated by reference to Exhibit 10.1 to the Quarterly Report on Form 10-Q for the quarter ended May 4, 2002.
*10.2	Second Amended and Restated 1998 Director Compensation Plan. Incorporated by reference to Exhibit 10.2 to the Annual Report on Form 10-K for the fiscal year ended August 26, 2000.
*10.3	Third Amended and Restated 1996 Stock Option Plan. Incorporated by reference to Exhibit 10.3 to the Annual Report on Form 10-K for the fiscal year ended August 30, 2003.
*10.4	Form of Incentive Stock Option Agreement. Incorporated by reference to Exhibit 10.2 to the Quarterly Report on Form 10-Q for the quarter ended November 23, 2002.
*10.5	Form of Non-Qualified Stock Option Agreement. Incorporated by reference to Exhibit 10.1 to the Quarterly Report on Form 10-Q for the quarter ended November 23, 2002.
*10.6	AutoZone, Inc. 2003 Director Stock Option Plan. Incorporated by reference to Appendix C to the definitive proxy statement dated November 1, 2002, for the Annual Meeting of Stockholders held December 12, 2002.
*10.7	AutoZone, Inc. 2003 Director Compensation Plan. Incorporated by reference to Appendix D to the definitive proxy statement dated November 1, 2002, for the Annual Meeting of Stockholders held December 12, 2002.
*10.8	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.
*10.9	AutoZone, Inc. 2006 Stock Option Plan. Incorporated by reference to Appendix A to the definitive proxy statement dated October 25, 2006, for the Annual Meeting of Stockholders held December 13, 2006.
*10.10	Form of Stock Option Agreement. Incorporated by reference to Exhibit 10.26 to the Annual Report on Form 10-K for the fiscal year ended August 25, 2007.
*10.11	AutoZone, Inc. Fifth Amended and Restated Executive Stock Purchase Plan. Incorporated by reference to Exhibit 10.11 to the Annual Report on Form 10-K dated October 22, 2012.

75

*10.12	Amended and Restated AutoZone, Inc. 2003 Director Compensation Plan. Incorporated by reference to Exhibit 99.2 to the Current Report on Form 8-K dated January 4, 2008.
*10.13	Amended and Restated AutoZone, Inc. 2003 Director Stock Option Plan. Incorporated by reference to Exhibit 99.3 to the Current Report on Form 8-K dated January 4, 2008.
*10.14	AutoZone, Inc. Enhanced Severance Pay Plan. Incorporated by reference to Exhibit 99.1 to the Current Report on Form 8-K dated February 15, 2008.
*10.15	Form of non-compete and non-solicitation agreement signed by each of the following executive officers: Mark A. Finestone, William T. Giles, William W. Graves, Ronald B. Griffin, Thomas B. Newbern, Charlie Pleas, III, Larry M. Roesel, Albert Saltiel, and Mike A. Womack; and by AutoZone, Inc., with an effective date of February 14, 2008, for each. Incorporated by reference to Exhibit 99.2 to the Current Report on Form 8-K dated February 15, 2008.
*10.16	Form of non-compete and non-solicitation agreement approved by AutoZone’s Compensation Committee for execution by non-executive officers. Incorporated by reference to Exhibit 99.3 to the Current Report on Form 8-K dated February 15, 2008.
*10.17	Agreement dated February 14, 2008, between AutoZone, Inc. and William C. Rhodes, III. Incorporated by reference to Exhibit 99.4 to the Current Report on Form 8-K dated February 15, 2008.
*10.18	Form of non-compete and non-solicitation agreement signed by each of the following officers: Rebecca W. Ballou, Craig Blackwell, Brian L. Campbell, Philip B. Daniele, III, Robert A. Durkin, Bill Edwards, Joseph Espinosa, Preston B. Frazer, Stephany L. Goodnight, David Goudge, James C. Griffith, William R. Hackney, Rodney Halsell, David Klein, Trevor Klein, Jeffery Lagges, Grantland E. McGee, Jr., Mitchell Major, Ann A. Morgan, J. Scott Murphy, Jeffrey H. Nix, Raymond A. Pohlman, Elizabeth Rabun, Juan A. Santiago, Joe L. Sellers, Jr., Brett Shanaman, Jamey Traywick, Doug Wines, Solomon Woldeslassie, Kristen C. Wright, and Larry Yeske; and by AutoZone, Inc. Incorporated by reference to Exhibit 10.1 to the Quarterly Report on Form 10-Q for the quarter ended May 3, 2008.
*10.19	Second Amended and Restated Employment and Non-Compete Agreement between AutoZone, Inc. and Harry L. Goldsmith dated December 29, 2008. Incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K dated December 30, 2008.
*10.20	Amended and Restated Employment and Non-Compete Agreement between AutoZone, Inc. and Robert D. Olsen dated December 29, 2008. Incorporated by reference to Exhibit 10.2 to the Current Report on Form 8-K dated December 30, 2008.
*10.21	First Amendment to Amended and Restated Employment Agreement between AutoZone, Inc. and Robert D. Olsen dated September 29, 2009. Incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K dated September 30, 2009.
*10.22	AutoZone, Inc. 2010 Executive Incentive Compensation Plan, incorporated by reference to Exhibit A to the definitive proxy statement dated October 26, 2009, for the Annual Meeting of Stockholders held December 16, 2009.
*10.23	AutoZone, Inc. 2011 Equity Incentive Award Plan, incorporated by reference to Exhibit A to the definitive proxy statement dated October 25, 2010, for the Annual Meeting of Stockholders held December 15, 2010.
*10.24	Form of Stock Option Agreement under the 2006 Stock Option Plan, effective September 2010. Incorporated by reference to Exhibit 10.2 to the Quarterly Report on Form 10-Q dated December 16, 2010.

76

*10.25	Form of Stock Option Agreement under the 2006 Stock Option Plan for certain executive officers, effective September 2010. Incorporated by reference to Exhibit 10.3 to the Quarterly Report on Form 10-Q dated December 16, 2010.
*10.26	Form of Letter Agreement dated as of December 14, 2010, amending certain Stock Option Agreements of executive officers. Incorporated by reference to Exhibit 10.4 to the Quarterly Report on Form 10-Q dated December 16, 2010.
*10.27	AutoZone, Inc. 2011 Director Compensation Program. Incorporated by reference to Exhibit 10.5 to the Quarterly Report on Form 10-Q dated December 16, 2010.
*10.28	Performance-Based Restricted Stock Units Award Agreement dated December 15, 2010, between AutoZone, Inc. and William C. Rhodes, III, incorporated by reference to Exhibit 10.2 to the Form 8-K dated December 15, 2010.
*10.29	Form of Stock Option Agreement under the 2011 Equity Incentive Award Plan. Incorporated by reference to Exhibit 10.2 to the Quarterly Report on Form 10-Q dated March 17, 2011.
*10.30	Form of Stock Option Agreement under the 2011 Equity Incentive Award Plan for certain executive officers. Incorporated by reference to Exhibit 10.3 to the Quarterly Report on Form 10-Q dated March 17, 2011.
*10.31	First Amended and Restated AutoZone, Inc. Enhanced Severance Pay Plan. Incorporated by reference to Exhibit 10.4 to the Quarterly Report on Form 10-Q dated March 17, 2011.
*10.32	Form of Stock Option Agreement under the 2011 Equity Incentive Award Plan for officers effective September 27, 2011. Incorporated by reference to Exhibit 10.37 to the Annual Report on Form 10-K for the fiscal year ended August 27, 2011.
*10.33	Form of Stock Option Agreement under the 2011 Equity Incentive Award Plan for certain executive officers effective September 27, 2011. Incorporated by reference to Exhibit 10.38 to the Annual Report on Form 10-K for the fiscal year ended August 27, 2011.
10.34	Amended and Restated Credit Agreement dated as of September, 13, 2011 among AutoZone, Inc. as Borrower, the several Lenders from time to time party thereto, and Bank of America, N.A. as Administrative Agent and Swingline Lender, JPMorgan Chase Bank, N.A. as Syndication Agent, arranged by Merrill Lynch, Pierce, Fenner & Smith Incorporated and J.P. Morgan Securities LLC as Joint Lead Arrangers and Merrill Lynch, Pierce, Fenner & Smith Incorporated, J.P. Morgan Securities LLC, SunTrust Robinson Humphrey, Inc., U.S. Bank National Association, Wells Fargo Securities, LLC and Barclays Capital as Joint Book Runners. Incorporated by reference to Exhibit 10.39 to the Annual Report on Form 10-K for the fiscal year ended August 27, 2011.
*10.35	Sixth Amended and Restated AutoZone, Inc. Employee Stock Purchase Plan. Incorporated by reference to Exhibit 10.40 to the Annual Report on Form 10-K for the fiscal year ended August 27, 2011.
*10.36	Second Amended AutoZone, Inc. Executive Deferred Compensation Plan. Incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K dated December 14, 2011.
*10.37	Offer letter dated May 23, 2012, to Mike A. Womack. Incorporated by reference to Exhibit 10.38 of Annual Report on Form 10-K dated October 22, 2012.
*10.38	Offer letter dated April 26, 2012, to Ronald B. Griffin. Incorporated by reference to Exhibit 10.39 of Annual Report on Form 10-K dated October 22, 2012.
*10.39	Amended Non-Compete Agreement between AutoZone, Inc. and Jon A. Bascom dated May 25, 2012. Incorporated by reference to Exhibit 10.39 of Annual Report on Form 10-K dated October 22, 2012.

77

*10.40	Offer letter dated February 7, 2013, to Albert Saltiel. Incorporated by reference to Exhibit 10.2 of the Quarterly Report on Form 10-Q dated June 12, 2013.
12.1	Computation of Ratio of Earnings to Fixed Charges.
14.1	Code of Ethical Conduct. Incorporated by reference to Exhibit 14.1 of the Annual Report on Form 10-K for the fiscal year ended August 30, 2003.
21.1	Subsidiaries of the Registrant.
23.1	Consent of Ernst & Young LLP.
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.

78

EX-12.1

Exhibit 12.1

Computation of Ratio of Earnings to Fixed Charges

(Unaudited)

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

EX-21.1

Exhibit 21.1

SUBSIDIARIES OF THE REGISTRANT

NAME	STATE OR COUNTRY OF ORGANIZATION OR INCORPORATION
ALLDATA LLC	Nevada
AutoZone de México, S. de R.L. de C.V.	Mexico
AutoZone Development Corporation	Nevada
AutoZone Northeast, Inc. fka ADAP, Inc	New Jersey
AutoZone Stores, Inc.	Nevada
AutoZone Texas, L.P.	Delaware
AutoZone West, Inc. fka Chief Auto Parts Inc.	Delaware
AutoZone.com, Inc.	Virginia
AutoZone Parts, Inc.	Nevada
AutoZone Puerto Rico, Inc.	Puerto Rico
AutoAnything, Inc.	Nevada

In addition, 24 subsidiaries operating in the United States and 13 subsidiaries operating outside of the United States have been omitted as they would not, considered in the aggregate as a single subsidiary, constitute a significant subsidiary as defined by Rule 1-02(w) of Regulation S-X.

EX-23.1

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the following Registration Statements of AutoZone, Inc. of our reports dated October 28, 2013, with respect to AutoZone, Inc.’s consolidated financial statements and the effectiveness of internal control over financial reporting of AutoZone, Inc., included in this Annual Report (Form 10-K) for the year ended August 31, 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-8 No. 333-103665) pertaining to the AutoZone, Inc. 2003 Director Compensation Plan

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

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

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

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

/s/ Ernst & Young LLP

Memphis, Tennessee

October 28, 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 Annual Report on Form 10-K 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.

October 28, 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 Annual Report on Form 10-K 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.

October 28, 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 Annual Report of AutoZone, Inc. (the “Company”) on Form 10-K for the fiscal year ended August 31, 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.

October 28, 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 Annual Report of AutoZone, Inc. (the “Company”) on Form 10-K for the fiscal year ended August 31, 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.

October 28, 2013

/s/ WILLIAM T. GILES

William T. Giles

Chief Financial Officer and Executive

Vice President – Finance, Information

Technology and ALLDATA

(Principal Financial Officer)

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Leases - Future Minimum Annual Rental Commitments Under Non-Cancelable Operating Leases and Capital Leases (Detail) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2013
Leases [Abstract]
2014	$ 228,747
2015	220,877
2016	204,112
2017	187,312
2018	170,745
Thereafter	945,429
Total minimum payments required	1,957,222
2014	32,246
2015	30,943
2016	24,363
2017	16,388
2018	5,283
Thereafter
Total minimum payments required	109,223
Less: Interest	(3,052)
Present value of minimum capital lease payments	$ 106,171

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Pension and Savings Plans - Net Periodic Benefit Expense (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011
Compensation And Retirement Disclosure [Abstract]
Interest cost	$ 11,746	$ 12,214	$ 11,135
Expected return on plan assets	(13,617)	(11,718)	(9,326)
Amortization of prior service cost
Recognized net actuarial losses	14,721	9,795	9,405
Net periodic benefit expense	$ 12,850	$ 10,291	$ 11,214

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Pension and Savings Plans - Benefit Payments are Expected to be Paid as Follows (Detail) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2013
Compensation And Retirement Disclosure [Abstract]
2014	$ 9,125
2015	9,205
2016	9,912
2017	10,604
2018	11,193
2019 - 2023	$ 65,396

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Derivative Financial Instruments

12 Months Ended

Aug. 31, 2013

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

Note H – Derivative Financial Instruments

The Company periodically uses derivatives to hedge exposures to interest rates. The Company does not hold or issue financial instruments for trading purposes. For transactions that meet the hedge accounting criteria, the Company formally designates and documents the instrument as a hedge at inception and quarterly thereafter assesses the hedges to ensure they are effective in offsetting changes in the cash flows of the underlying exposures. Derivatives are recorded in the Company’s Consolidated Balance Sheet at fair value, determined using available market information or other appropriate valuation methodologies. In accordance with ASC Topic 815, Derivatives and Hedging, the effective portion of a financial instrument’s change in fair value is recorded in Accumulated other comprehensive loss for derivatives that qualify as cash flow hedges and any ineffective portion of an instrument’s change in fair value is recognized in earnings.

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 August 31, 2013, the Company had $11.8 million recorded in Accumulated other comprehensive loss related to net 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 fiscal year ended August 31, 2013, the Company reclassified $1.3 million of net losses from Accumulated other comprehensive loss to Interest expense. In the fiscal year ended August 25, 2012, the Company reclassified $1.9 million of net losses from Accumulated other comprehensive loss to Interest expense. The Company expects to reclassify $182 thousand of net losses from Accumulated other comprehensive loss to Interest expense over the next 12 months.

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Income Taxes - Reconciliation of Provision for Income Taxes (Parenthetical) (Detail)	12 Months Ended
	Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011
Income Tax Disclosure [Abstract]
Federal statutory tax rate	35.00%	35.00%	35.00%

XML

Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011
Statement Of Income And Comprehensive Income [Abstract]
Pension liability adjustments, taxes	$ 27,972	$ 29,744	$ 3,998
Unrealized loss adjustment on marketable securities net of taxes	202	69	91
Net losses on outstanding derivatives, taxes	$ 440	$ 4,800	$ 0

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Significant Accounting Policies

12 Months Ended

Aug. 31, 2013

Accounting Policies [Abstract]

Significant Accounting Policies

Note A – Significant Accounting Policies

Business: AutoZone, Inc. and its wholly owned subsidiaries (“AutoZone” or the “Company”) are principally a retailer and distributor of automotive parts and accessories. At the end of fiscal 2013, the Company operated 4,836 stores in the United States (“U.S.”), including Puerto Rico; 362 stores in Mexico; and three stores in 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. In 3,421 of the domestic stores, select stores in Mexico, and the stores in Brazil, at the end of fiscal 2013, the Company had 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. The Company also sells the ALLDATA brand automotive diagnostic and repair software through www.alldata.com. Additionally, the Company sells automotive hard parts, maintenance items, accessories, and non-automotive products through www.autozone.com, and accessories and performance parts through www.autoanything.com, and its commercial customers can make purchases through www.autozonepro.com. The Company does not derive revenue from automotive repair or installation services.

Fiscal Year: The Company’s fiscal year consists of 52 or 53 weeks ending on the last Saturday in August. Fiscal 2013 represented 53 weeks and fiscal 2012 and 2011 represented 52 weeks.

Basis of Presentation: The consolidated financial statements include the accounts of AutoZone, Inc. and its wholly owned subsidiaries. All significant intercompany transactions and balances have been eliminated in consolidation.

Use of Estimates: Management of the Company has made a number of estimates and assumptions relating to the reporting of assets and liabilities and the disclosure of contingent liabilities to prepare these financial statements. Actual results could differ from those estimates.

Cash and Cash Equivalents: Cash equivalents consist of investments with original maturities of 90 days or less at the date of purchase. Cash equivalents include proceeds due from credit and debit card transactions with settlement terms of less than 5 days. Credit and debit card receivables included within cash and cash equivalents were $39.8 million at August 31, 2013 and $34.0 million at August 25, 2012.

Cash balances are held in various locations around the world. Of the $142.2 million and $103.1 million of cash and cash equivalents at August 31, 2013, and August 25, 2012, respectively, $38.2 million and $7.8 million, respectively, were held outside of the U.S. and were generally utilized to support liquidity needs in foreign operations. The Company intends to continue to permanently reinvest the cash held outside of the U.S. in its foreign operations.

Accounts Receivable: Accounts receivable consists of receivables from commercial customers and vendors, and are presented net of an allowance for uncollectible accounts. AutoZone routinely grants credit to certain of its commercial customers. The risk of credit loss in its trade receivables is substantially mitigated by the Company’s credit evaluation process, short collection terms and sales to a large number of customers, as well as the low dollar value per transaction for most of its sales. Allowances for potential credit losses are determined based on historical experience and current evaluation of the composition of accounts receivable. Historically, credit losses have been within management’s expectations and the allowances for uncollectible accounts were $2.9 million at August 31, 2013, and $2.4 million at August 25, 2012.

Merchandise Inventories: Inventories are stated at the lower of cost or market using the last-in, first-out method for domestic inventories and the first-in, first out (“FIFO”) method for Mexico inventories. Included in inventory 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 our merchandise purchases, was $283.7 million at August 31, 2013, and $270.4 million at August 25, 2012.

Marketable Securities: The Company invests a portion of its assets held by the Company’s wholly owned insurance captive in marketable debt securities and classifies them as available-for-sale. The Company includes these securities within the Other current assets and Other long-term assets captions in the accompanying Consolidated Balance Sheets and records the amounts at fair market value, which is determined using quoted market prices at the end of the reporting period. A discussion of marketable securities is included in “Note E – Fair Value Measurements” and “Note F – Marketable Securities.”

Property and Equipment: Property and equipment is stated at cost. Depreciation and amortization are computed principally using the straight-line method over the following estimated useful lives: buildings, 40 to 50 years; building improvements, 5 to 15 years; equipment, 3 to 10 years; and leasehold improvements, over the shorter of the asset’s estimated useful life or the remaining lease term, which includes any reasonably assured renewal periods. Depreciation and amortization include amortization of assets under capital lease.

Impairment of Long-Lived Assets: The Company evaluates the recoverability of its long-lived assets whenever events or changes in circumstances indicate that the carrying value of an asset may not be recoverable. When such an event occurs, the Company compares the sum of the undiscounted expected future cash flows of the asset (asset group) with the carrying amounts of the asset. If the undiscounted expected future cash flows are less than the carrying value of the assets, the Company measures the amount of impairment loss as the amount by which the carrying amount of the assets exceeds the fair value of the assets. There were no material impairment losses recorded in the three years ended August 31, 2013.

Goodwill: The cost in excess of fair value of identifiable net assets of businesses acquired is recorded as goodwill. Goodwill has not been amortized since fiscal 2001, but an analysis is performed at least annually to compare the fair value of the reporting unit to the carrying amount to determine if any impairment exists. The Company performs its annual impairment assessment in the fourth quarter of each fiscal year, unless circumstances dictate more frequent assessments. Refer to “Note N – Goodwill and Intangibles” for additional disclosures regarding the Company’s goodwill and impairment assessment.

Intangible Assets: Intangible assets consist of assets from the acquisition of AutoAnything, and include technology, noncompete agreements, customer relationships and trade name. Intangible assets are amortized over periods ranging from 5 to 10 years. Non-amortizing intangibles are reviewed at least annually for impairment by comparing the carrying amount to fair value. The Company performs its annual impairment assessment in the fourth quarter of each fiscal year, unless circumstances dictate more frequent assessments. Refer to “Note N – Goodwill and Intangibles” for additional disclosures regarding the Company’s intangible assets and impairment assessment.

Derivative Instruments and Hedging Activities: AutoZone is exposed to market risk from, among other things, changes in interest rates, foreign exchange rates and fuel prices. From time to time, the Company uses various derivative instruments to reduce such risks. To date, based upon the Company’s current level of foreign operations, no derivative instruments have been utilized to reduce foreign exchange rate risk. All of the Company’s hedging activities are governed by guidelines that are authorized by AutoZone’s Board of Directors (the “Board”). Further, the Company does not buy or sell derivative instruments for trading purposes.

AutoZone’s financial market risk results primarily from changes in interest rates. At times, AutoZone reduces its exposure to changes in interest rates by entering into various interest rate hedge instruments such as interest rate swap contracts, treasury lock agreements and forward-starting interest rate swaps. All of the Company’s interest rate hedge instruments are designated as cash flow hedges. Refer to “Note H – Derivative Financial Instruments” for additional disclosures regarding the Company’s derivative instruments and hedging activities. Cash flows related to these instruments designated as qualifying hedges are reflected in the accompanying Consolidated Statements of Cash Flows in the same categories as the cash flows from the items being hedged. Accordingly, cash flows relating to the settlement of interest rate derivatives hedging the forecasted issuance of debt have been reflected upon settlement as a component of financing cash flows. The resulting gain or loss from such settlement is deferred to Accumulated other comprehensive loss and reclassified to interest expense over the term of the underlying debt. This reclassification of the deferred gains and losses impacts the interest expense recognized on the underlying debt that was hedged and is therefore reflected as a component of operating cash flows in periods subsequent to settlement.

Foreign Currency: The Company accounts for its Mexican and Brazilian operations using the Mexican peso and the Brazilian real as the functional currencies and converts its financial statements from these currencies to U.S. dollars. The cumulative loss on currency translation is recorded as a component of Accumulated other comprehensive loss and approximated $62.5 million at August 31, 2013, and $50.3 million at August 25, 2012.

Self-Insurance Reserves: The Company retains a significant portion of the risks associated with workers’ compensation, employee health, general, products liability, property and vehicle insurance. Through various methods, which include analyses of historical trends and utilization of actuaries, the Company estimates the costs of these risks. The costs are accrued based upon the aggregate of the liability for reported claims and an estimated liability for claims incurred but not reported. Estimates are based on calculations that consider historical lag and claim development factors. The long-term portions of these liabilities are recorded at the Company’s estimate of their net present value.

Deferred Rent: The Company recognizes rent expense on a straight-line basis over the course of the lease term, which includes any reasonably assured renewal periods, beginning on the date the Company takes physical possession of the property (see “Note O – Leases”). Differences between this calculated expense and cash payments are recorded as a liability within the Accrued expenses and other and Other long-term liabilities captions in the accompanying Consolidated Balance Sheets, based on the terms of the lease. Deferred rent approximated $96.5 million as of August 31, 2013, and $86.9 million as of August 25, 2012.

Financial Instruments: 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 I – Financing,” marketable securities is included in “Note F – Marketable Securities,” and derivatives is included in “Note H – Derivative Financial Instruments.”

Income Taxes: The Company accounts for income taxes under the liability method. Deferred tax assets and liabilities are determined based on differences between financial reporting and tax bases of assets and liabilities and are measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse. Our effective tax rate is based on income by tax jurisdiction, statutory rates, and tax saving initiatives available to the Company in the various jurisdictions in which we operate.

The Company recognizes liabilities for uncertain income tax positions based on a two-step process. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates that it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step requires the Company to estimate and measure the tax benefit as the largest amount that is more than 50% likely to be realized upon ultimate settlement. It is inherently difficult and subjective to estimate such amounts, as the Company must determine the probability of various possible outcomes. The Company reevaluates these uncertain tax positions on a quarterly basis or when new information becomes available to management. These reevaluations are based on factors including, but not limited to, changes in facts or circumstances, changes in tax law, successfully settled issues under audit, expirations due to statutes, and new audit activity. Such a change in recognition or measurement could result in the recognition of a tax benefit or an increase to the tax accrual.

The Company classifies interest related to income tax liabilities, and if applicable, penalties, as a component of Income tax expense. The income tax liabilities and accrued interest and penalties that are expected to be payable within one year of the balance sheet date are presented within the Accrued expenses and other caption in the accompanying Consolidated Balance Sheets. The remaining portion of the income tax liabilities and accrued interest and penalties are presented within the Other long-term liabilities caption in the accompanying Consolidated Balance Sheets because payment of cash is not anticipated within one year of the balance sheet date. Refer to “Note D – Income Taxes” for additional disclosures regarding the Company’s income taxes.

Sales and Use Taxes: Governmental authorities assess sales and use taxes on the sale of goods and services. The Company excludes taxes collected from customers in its reported sales results; such amounts are included within the Accrued expenses and other caption until remitted to the taxing authorities.

Dividends: The Company currently does not pay a dividend on its common stock. The ability to pay dividends is subject to limitations imposed by Nevada law. Under Nevada law, any future payment of dividends would be dependent upon the Company’s financial condition, capital requirements, earnings and cash flow.

Revenue Recognition: The Company recognizes sales at the time the sale is made and the product is delivered to the customer. Revenue from sales are presented net of allowances for estimated sales returns, which are based on historical return rates.

A portion of the Company’s transactions include the sale of auto parts that contain a core component. The core component represents the recyclable portion of the auto part. Customers are not charged for the core component of the new part if a used core is returned at the point of sale of the new part; otherwise the Company charges customers a specified amount for the core component. The Company refunds that same amount upon the customer returning a used core to the store at a later date. The Company does not recognize sales or cost of sales for the core component of these transactions when a used part is returned or expected to be returned from the customer.

Vendor Allowances and Advertising Costs: The Company receives various payments and allowances from its vendors through a variety of programs and arrangements. Monies received from vendors include rebates, allowances and promotional funds. The amounts to be received are subject to the terms of the vendor agreements, which generally do not state an expiration date, but are subject to ongoing negotiations that may be impacted in the future based on changes in market conditions, vendor marketing strategies and changes in the profitability or sell-through of the related merchandise.

Rebates and other miscellaneous incentives are earned based on purchases or product sales and are accrued ratably over the purchase or sale of the related product. These monies are generally recorded as a reduction of merchandise inventories and are recognized as a reduction to cost of sales as the related inventories are sold.

For arrangements that provide for reimbursement of specific, incremental, identifiable costs incurred by the Company in selling the vendors’ products, the vendor funds are recorded as a reduction to Operating, selling, general and administrative expenses in the period in which the specific costs were incurred.

The Company expenses advertising costs as incurred. Advertising expense, net of vendor promotional funds, was $83.7 million in fiscal 2013, $74.7 million in fiscal 2012, and $71.5 million in fiscal 2011. Vendor promotional funds, which reduced advertising expense, amounted to $24.4 million in fiscal 2013, $19.7 million in fiscal 2012, and $23.2 million in fiscal 2011.

Cost of Sales and Operating, Selling, General and Administrative Expenses: The following illustrates the primary costs classified in each major expense category:

Cost of Sales

• Total cost of merchandise sold, including:

• Freight expenses associated with moving merchandise inventories from the Company’s vendors to the distribution centers;

• Vendor allowances that are not reimbursements for specific, incremental and identifiable costs

• Costs associated with operating the Company’s supply chain, including payroll and benefit costs, warehouse occupancy costs, transportation costs and depreciation; and

• Inventory shrinkage

Operating, Selling, General and Administrative Expenses

• Payroll and benefit costs for store and store support employees;

• Occupancy costs of store and store support facilities;

• Depreciation and amortization related to retail and store support assets;

• Transportation costs associated with commercial and hub deliveries;

• Advertising;

• Self insurance costs; and

• Other administrative costs, such as credit card transaction fees, supplies, and travel and lodging

Warranty Costs: The Company or the vendors supplying its products provides the Company’s customers limited warranties on certain products that range from 30 days to lifetime. In most cases, the Company’s vendors are primarily responsible for warranty claims. Warranty costs relating to merchandise sold under warranty not covered by vendors are estimated and recorded as warranty obligations at the time of sale based on each product’s historical return rate. These obligations, which are often funded by vendor allowances, are recorded within the Accrued expenses and other caption in the Consolidated Balance Sheets. For vendor allowances that are in excess of the related estimated warranty expense for the vendor’s products, the excess is recorded in inventory and recognized as a reduction to cost of sales as the related inventory is sold.

Shipping and Handling Costs: The Company does not generally charge customers separately for shipping and handling. Substantially all the costs the Company incurs to ship products to our stores are included in cost of sales.

Pre-opening Expenses: Pre-opening expenses, which consist primarily of payroll and occupancy costs, are expensed as incurred.

Earnings per Share: Basic earnings per share is based on the weighted average outstanding common shares. Diluted earnings per share is based on the weighted average outstanding common shares adjusted for the effect of common stock equivalents, which are primarily stock options. There were 8,600 stock options excluded from the diluted earnings per share computation that would have been anti-dilutive as of August 31, 2013. There were 30,000 options excluded for the year ended August 25, 2012, and no options excluded for the year ended August 27, 2011.

Share-Based Payments: Share-based payments include stock option grants and certain other transactions under the Company’s stock plans. The Company recognizes compensation expense for its share-based payments based on the fair value of the awards. See “Note B – Share-Based Payments” for further discussion.

Risk and Uncertainties: In fiscal 2013, one class of similar products accounted for 10 percent of the Company’s total revenues, and no vendor supplied more than 10 percent of the Company’s total purchases.

Recently Adopted Accounting Pronouncements: In August 2011, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2011-08, Intangibles – Goodwill and Other, which amends Accounting Standards Codification (“ASC”) Topic 350, Intangibles – Goodwill and Other. The purpose of ASU 2011-08 is to simplify how an entity tests goodwill for impairment. Entities will assess qualitative factors to determine whether it is more likely than not that a reporting unit’s fair value is less than its carrying value. In instances where the fair value is determined to be less than the carrying value, entities will perform the two-step quantitative goodwill impairment test. The Company adopted this standard effective August 31, 2013, and it had no impact on the consolidated financial statements.

Recently Issued Accounting Pronouncements: In July 2012, the FASB issued ASU 2012-02, Testing Indefinite-Lived Intangible Assets for Impairment. The purpose of ASU 2012-02 is to simplify how an entity tests for impairment of indefinite-lived intangible assets. Entities will assess qualitative factors to determine whether it is more likely than not that a long-lived intangible asset’s fair value is less than its carrying value. In instances where the fair value is determined to be less than the carrying value, entities will perform the two-step quantitative goodwill impairment test. The Company does not expect the provision of ASU 2012-02 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.

In February 2013, the FASB issued ASU 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. Under ASU 2013-02, an entity is required to provide information about the amounts reclassified out of accumulated other comprehensive income (“AOCI”) by component. In addition, an entity is required to present, either on the face of the financial statements or in the notes, significant amounts reclassified out of AOCI by the respective line items of net income, but only if the amount reclassified is required to be reclassified in its entirety in the same reporting period. For amounts that are not required to be reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures that provide additional details about those amounts. ASU 2013-02 does not change the current requirements for reporting net income or other comprehensive income in the financial statements. The Company 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.

In July 2013, the FASB issued ASU 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. Under ASU 2013-11, an entity is required to disclose a liability related to an unrecognized tax benefit as an offset against a deferred tax asset for a net operating loss carryforward, a similar tax loss or tax credit carryforward if certain criteria are met. In situations of a net operating loss carryforward, a similar tax loss or a tax credit carryforward is not available at the reporting date under the tax law of the jurisdiction or the tax law of the jurisdiction does not require, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit will be presented in the financial statements as a liability and will not be combined with deferred tax assets. The Company does not expect the provision of ASU 2013-11 to have a material impact on its consolidated financial statements. This update will be effective for the Company at the beginning of its fiscal 2015 year.

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Leases

12 Months Ended

Aug. 31, 2013

Leases [Abstract]

Leases

Note O – Leases

The Company leases some of its retail stores, distribution centers, facilities, land and equipment, including vehicles. Other than vehicle leases, most of the leases are operating leases, which include renewal options made at the Company’s election, options to purchase and provisions for percentage rent based on sales. Rental expense was $246.3 million in fiscal 2013, $229.4 million in fiscal 2012, and $213.8 million in fiscal 2011. Percentage rentals were insignificant.

The Company has a fleet of vehicles used for delivery to its commercial customers and stores and travel for members of field management. The majority of these vehicles are held under capital lease. At August 31, 2013, the Company had capital lease assets of $107.5 million, net of accumulated amortization of $44.8 million, and capital lease obligations of $106.2 million, of which $32.2 million is classified as Accrued expenses and other as it represents the current portion of these obligations. At August 25, 2012, the Company had capital lease assets of $104.2 million, net of accumulated amortization of $36.4 million, and capital lease obligations of $102.3 million, of which $29.8 million was classified as Accrued expenses and other.

The Company records rent for all operating leases on a straight-line basis over the lease term, including any reasonably assured renewal periods and the period of time prior to the lease term that the Company is in possession of the leased space for the purpose of installing leasehold improvements. Differences between recorded rent expense and cash payments are recorded as a liability in Accrued expenses and other and Other long-term liabilities in the accompanying Consolidated Balance Sheets, based on the terms of the lease. The deferred rent approximated $96.5 million on August 31, 2013, and $86.9 million on August 25, 2012.

Future minimum annual rental commitments under non-cancelable operating leases and capital leases were as follows at the end of fiscal 2013:

(in thousands)	Operating Leases		Capital Leases
2014	$	228,747	$	32,246
2015		220,877		30,943
2016		204,112		24,363
2017		187,312		16,388
2018		170,745		5,283
Thereafter		945,429		—
Total minimum payments required	$	1,957,222		109,223
Less: Interest				(3,052	)
Present value of minimum capital lease payments			$	106,171

In connection with the Company’s December 2001 sale of the TruckPro business, the Company subleased some properties to the purchaser for an initial term of not less than 20 years. The Company’s remaining aggregate rental obligation at August 31, 2013 of $15.6 million is included in the above table, but the obligation is entirely offset by the sublease rental agreement.

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Financing - Additional Information (Detail) (USD $)	12 Months Ended				12 Months Ended		12 Months Ended		1 Months Ended	12 Months Ended					1 Months Ended	12 Months Ended					1 Months Ended	12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended
	Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011	Sep. 13, 2011 Revolving Credit Facility, which was Scheduled to Expire in July 2012 [Member]	Aug. 31, 2013 Letters of Credit [Member]	Jun. 30, 2013 Letters of Credit [Member]	Aug. 31, 2013 Capital Leases [Member]	Aug. 31, 2013 Other Letters Of Credit [Member]	Apr. 29, 2013 3.125% Senior Notes due July 2023, Effective Interest Rate of 3.26% [Member]	Aug. 31, 2013 3.125% Senior Notes due July 2023, Effective Interest Rate of 3.26% [Member]	Aug. 25, 2012 3.125% Senior Notes due July 2023, Effective Interest Rate of 3.26% [Member]	Aug. 31, 2013 4.375% Senior Notes due June 2013, Effective Interest Rate of 5.65% [Member]	Apr. 29, 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]	Nov. 13, 2012 2.875% Senior Notes due January 2023, Effective Interest Rate of 3.21% [Member]	Aug. 31, 2013 2.875% Senior Notes due January 2023, Effective Interest Rate of 3.21% [Member]	Aug. 25, 2012 2.875% Senior Notes due January 2023, Effective Interest Rate of 3.21% [Member]	Aug. 31, 2013 5.875% Senior Notes due October 2012, Effective Interest Rate of 6.33% [Member]	Nov. 13, 2012 5.875% Senior Notes due October 2012, Effective Interest Rate of 6.33% [Member]	Aug. 25, 2012 5.875% Senior Notes due October 2012, Effective Interest Rate of 6.33% [Member]	Apr. 24, 2012 3.700% Senior Notes due April 2022, Effective Interest Rate of 3.85% [Member]	Aug. 31, 2013 3.700% Senior Notes due April 2022, Effective Interest Rate of 3.85% [Member]	Aug. 25, 2012 3.700% Senior Notes due April 2022, Effective Interest Rate of 3.85% [Member]	Aug. 31, 2013 5.750% Senior Notes due January 2015, Effective Interest Rate of 5.89% [Member]	Aug. 25, 2012 5.750% Senior Notes due January 2015, Effective Interest Rate of 5.89% [Member]	Aug. 31, 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]	Aug. 31, 2013 7.125% Senior Notes due August 2018, Effective Interest Rate of 7.28% [Member]	Aug. 25, 2012 7.125% Senior Notes due August 2018, Effective Interest Rate of 7.28% [Member]	Aug. 31, 2013 4.000% Senior Notes due November 2020, Effective Interest Rate of 4.43% [Member]	Aug. 25, 2012 4.000% Senior Notes due November 2020, Effective Interest Rate of 4.43% [Member]
Line of Credit Facility [Line Items]
Commercial paper debt	$ 637,000,000												$ 200,000,000						$ 300,000,000
Senior notes non current																										326,300,000
Stated interest rate percentage									3.125%	3.125%	3.125%	4.375%	4.375%	4.375%	2.875%	2.875%	2.875%	5.875%	5.875%	5.875%	3.70%	3.70%	3.70%	5.75%	5.75%	6.50%	6.50%	7.125%	7.125%	4.00%	4.00%
Debt instrument, due date									July 2023	July 2023	July 2023	June 2013	June 2013	June 2013	January 2023	January 2023	January 2023	October 2012	October 2012	October 2012	April 2022	April 2022	April 2022	January 2015	January 2015	January 2014	January 2014	August 2018	August 2018	November 2020	November 2020
Remaining borrowing capacity under revolving credit facility	963,300,000
Amount available under credit facility	1,000,000,000	1,000,000,000		800,000,000
Expiration of credit facility	September 2016
Letter of Credit Facility Maximum Borrowing Capacity	1,250,000,000				200,000,000	100,000,000	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.
Line of credit facility covenant terms	The revolving credit facility agreement requires that the Company's consolidated interest coverage ratio as of the last day of each quarter shall be no less than 2.50:1. This ratio is defined as the ratio of (i) consolidated earnings before interest, taxes and rents to (ii) consolidated interest expense plus consolidated rents. The Company's consolidated interest coverage ratio as of August 31, 2013 was 4.68:1.
Debt covenant interest coverage ratio	4.68
Minimum debt covenant interest coverage ratio to be maintained quarterly	2.50
Letter of credit outstanding					99,400,000			41,800,000
Letter of credit facility expiration date					June 2016
Proceeds from issuance of debt	800,000,000	500,000,000	500,000,000						500,000,000						300,000,000						500,000,000
Debt issuance date										2013-04						2012-11						2012-04		2009-07		2008-08		2008-08		2010-11
Fair value of the Company's debt	4,259,000,000	4,055,000,000
Excess (shortfall) of fair value of debt over (from) carrying value	$ 72,200,000	$ 286,600,000

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Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2013	Aug. 25, 2012
Income Tax Disclosure [Abstract]
Beginning balance	$ 27,715	$ 29,906
Additions based on tax positions related to the current year	7,015	6,869
Additions for tax positions of prior years	2,758	44
Reductions for tax positions of prior years	(470)	(1,687)
Reductions due to settlements	(3,019)	(4,586)
Reductions due to statute of limitations	(3,356)	(2,831)
Ending balance	$ 30,643	$ 27,715

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Financing

12 Months Ended

Aug. 31, 2013

Debt Disclosure [Abstract]

Financing

Note I – Financing

The Company’s debt consisted of the following:

(in thousands)	August 31, 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
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		—
3.125% Senior Notes due July 2023, effective interest rate of 3.26%		500,000		—
Commercial paper, weighted average interest rate of 0.29% and 0.42% at August 31, 2013 and August 25, 2012, respectively		637,000		513,402
Unsecured, peso denominated borrowings, weighted average interest rate of 4.57% at August 25, 2012		—		4,781
Total debt		4,187,000		3,768,183
Less: Short-term borrowings		173,733		49,881
Long-term debt	$	4,013,267	$	3,718,302

As of August 31, 2013, $637 million of commercial paper borrowings and $326.3 million of the 6.500% Senior Notes due January 2014 are classified as long-term in the accompanying Consolidated Balance Sheets as the Company has the ability and intent to refinance on a long-term basis through available capacity in its revolving credit facility. As of August 31, 2013, the Company had $963.3 million of availability under its $1.0 billion revolving credit facility, expiring in September 2016 that would allow it to replace these short-term obligations with long-term financing.

In September 2011, the Company amended and restated its $800 million revolving credit facility, which was scheduled to expire in July 2012. The capacity under the revolving credit facility was increased 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 revolving credit facility agreement requires that the Company’s consolidated interest coverage ratio as of the last day of each quarter shall be no less than 2.50:1. This ratio is defined as the ratio of (i) consolidated earnings before interest, taxes and rents to (ii) consolidated interest expense plus consolidated rents. The Company’s consolidated interest coverage ratio as of August 31, 2013 was 4.68:1.

In addition to the revolving credit facility, the Company also maintains a letter of credit facility that allows it to request the participating bank to issue letters of credit on its behalf up to an aggregate amount of $100 million. As of August 31, 2013, the Company has $99.4 million in letters of credit outstanding under the letter of credit facility, which expires in June 2016.

In addition to the outstanding letters of credit issued under the committed facilities discussed above, the Company had $41.8 million in letters of credit outstanding as of August 31, 2013. These letters of credit have various maturity dates and were issued on an uncommitted basis.

On April 29, 2013, the Company issued $500 million in 3.125% Senior Notes due July 2023 under its shelf registration statement filed with the SEC on April 17, 2012 (the “Shelf Registration”). The Shelf Registration allows the Company to sell an indeterminate amount in debt securities to fund general corporate purposes, including repaying, redeeming or repurchasing outstanding debt and for working capital, capital expenditures, new store openings, stock repurchases and acquisitions. Proceeds from the debt issuance on April 29, 2013, were used to repay a portion of the outstanding commercial paper borrowings and for general corporate purposes. The Company used commercial paper borrowings to repay the $200 million in 4.375% Senior Notes due June 2013.

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

On April 24, 2012, the Company issued $500 million in 3.700% Senior Notes due April 2022 under its Shelf Registration. The Company used the proceeds from the issuance of debt to repay a portion of the commercial paper borrowings and for general corporate purposes.

The 5.750% Senior Notes issued in July 2009 and the 6.500% and 7.125% Senior Notes issued during August 2008, (collectively, the “Notes”), are subject to an interest rate adjustment if the debt ratings assigned to the Notes are downgraded. The Notes, along with the 3.125% Senior Notes issued in April 2013, 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 during November 2010, also contain a provision that repayment of the notes may be accelerated if the Company experiences a change in control (as defined in the agreements). The Company’s borrowings under its other senior notes contain minimal covenants, primarily restrictions on liens. Under the revolving credit facility, covenants include limitations on total indebtedness, restrictions on liens, a maximum debt to earnings ratio, and a change of control provision that may require acceleration of the repayment obligations under certain circumstances. These covenants are in addition to the consolidated interest coverage ratio discussed above. All of the repayment obligations under the 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 August 31, 2013, the Company was in compliance with all covenants related to its borrowing arrangements. All of the Company’s debt is unsecured. Scheduled maturities of long-term debt are as follows:

(in thousands)	Scheduled Maturities
2014	$	963,267
2015		500,000
2016		500,000
2017		—
2018		250,000
Thereafter		1,800,000
	$	4,013,267

The fair value of the Company’s debt was estimated at $4.259 billion as of August 31, 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 $72.2 million at August 31, 2013 and $286.6 million at August 25, 2012.

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Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Aug. 31, 2013
Loss Contingencies [Line Items]
Commitment for construction	$ 21.0
Surety bonds	30.7
The period of time before expiration of standby letters of credit and surety bonds	Less than one year
Standby Letters of Credit [Member]
Loss Contingencies [Line Items]
Outstanding standby letters of credit	$ 145.4

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Accrued Expenses and Other - Accrued Expenses (Detail) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2013	Aug. 25, 2012
Other Income And Expenses [Abstract]
Medical and casualty insurance claims (current portion)	$ 66,133	$ 63,484
Accrued compensation, related payroll taxes and benefits	137,165	151,669
Property, sales, and other taxes	90,944	97,542
Accrued interest	40,442	39,220
Accrued gift cards	32,160	29,060
Accrued sales and warranty returns	14,171	17,276
Capital lease obligations	32,246	29,842
Other	54,570	49,992
Total	$ 467,831	$ 478,085

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Goodwill and Intangibles - Schedule of Changes in Carrying Amount of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended			12 Months Ended
	Aug. 31, 2013	Aug. 31, 2013 Auto Parts Stores [Member]	Aug. 25, 2012 Auto Parts Stores [Member]	Aug. 31, 2013 Other [Member]
Goodwill [Line Items]
Net balance as of August 26, 2012	$ 302,645	$ 302,645	$ 302,645
Goodwill added through acquisition	83,440			83,440
Goodwill adjustments	(18,256)			(18,256)
Net balance as of August 31, 2013	$ 367,829	$ 302,645	$ 302,645	$ 65,184

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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	Aug. 31, 2013	Aug. 25, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other current assets	$ 16,410	$ 22,515
Other long-term assets	65,751	53,699
Total	82,161	76,214
Contingent consideration	(242)
Accrued expenses and other		(4,915)
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other current assets	16,386	22,515
Other long-term assets	49,011	40,424
Total	65,397	62,939
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other current assets	24
Other long-term assets	16,740	13,275
Total	16,764	13,275
Accrued expenses and other		(4,915)
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration	$ (242)

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Stock Repurchase Program (Tables)

12 Months Ended

Aug. 31, 2013

Equity [Abstract]

Summarize Company's Share Repurchase Activity

The Company’s share repurchase activity consisted of the following:

	Year Ended
(in thousands)	August 31, 2013		August 25, 2012		August 27, 2011
Amount	$	1,387,315	$	1,362,869	$	1,466,802
Shares		3,511		3,795		5,598

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Segment Reporting

12 Months Ended

Aug. 31, 2013

Segment Reporting [Abstract]

Segment Reporting

Note R – 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.

The Auto Parts Stores segment is a retailer and distributor of automotive parts and accessories through the Company’s 5,201 stores in the United States, Puerto Rico, Mexico and Brazil. Each store carries an extensive product line for cars, sport utility vehicles, vans and light trucks, including new and remanufactured automotive hard parts, maintenance items, accessories and non-automotive products.

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

The Company evaluates its reportable segment primarily on the basis of net sales and segment profit, which is defined as gross profit. The following table shows segment results for the following fiscal years:

	Year Ended
(in thousands)	August 31, 2013			August 25, 2012			August 27, 2011
Net Sales:
Auto Parts Stores	$	8,858,723		$	8,422,559		$	7,906,692
Other		288,807			181,304			166,281
Total	$	9,147,530		$	8,603,863		$	8,072,973
Segment Profit:
Auto Parts Stores	$	4,568,190		$	4,292,474		$	3,989,852
Other		172,745			139,562			129,611
Gross profit		4,740,935			4,432,036			4,119,463
Operating, selling, general and administrative expenses		(2,967,837	)		(2,803,145	)		(2,624,660	)
Interest expense, net		(185,415	)		(175,905	)		(170,557	)
Income before income taxes	$	1,587,683		$	1,452,986		$	1,324,246
Segment Assets:
Auto Parts Stores	$	6,719,885		$	6,214,688		$	5,827,285
Other		172,204			50,951			42,317
Total	$	6,892,089		$	6,265,639		$	5,869,602
Capital Expenditures:
Auto Parts Stores	$	402,028		$	364,361		$	316,074
Other		12,423			13,693			5,530
Total	$	414,451		$	378,054		$	321,604
Auto Parts Stores Sales by Product Grouping:
Failure	$	4,214,642		$	3,793,963		$	3,530,497
Maintenance items		3,224,229			3,196,807			3,051,672
Discretionary		1,419,852			1,431,789			1,324,523
Auto Parts Stores net sales	$	8,858,723		$	8,422,559		$	7,906,692

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Litigation

12 Months Ended

Aug. 31, 2013

Commitments And Contingencies Disclosure [Abstract]

Litigation

Note Q – 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 has contested any such assertions due to the existence of other entities/sources of contamination, some of which are 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.

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Share-Based Payments - Weighted Average for Key Assumptions Used in Determining Fair Value of Options Granted and Related Share-Based Compensation Expense (Detail)	12 Months Ended
	Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Expected price volatility	29.00%	28.00%	31.00%
Risk-free interest rates	0.50%	0.70%	1.00%
Weighted average expected lives (in years)	5 years 2 months 12 days	5 years 4 months 24 days	4 years 3 months 18 days
Forfeiture rate	10.00%	10.00%	10.00%
Dividend yield	0.00%	0.00%	0.00%

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Marketable Securities (Tables)

12 Months Ended

Aug. 31, 2013

Investments Debt And Equity Securities [Abstract]

Available-for-Sale Marketable Securities

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

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

	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

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Goodwill and Intangibles (Tables)

12 Months Ended

Aug. 31, 2013

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Changes in Carrying Amount of Goodwill

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

(in thousands)	Auto Parts Stores		Other			Total
Net balance as of August 26, 2012	$	302,645	$	—		$	302,645
Goodwill added through acquisition (1)		—		83,440			83,440
Goodwill adjustments (2)		—		(18,256	)		(18,256	)
Net balance as of August 31, 2013	$	302,645	$	65,184		$	367,829

(1) See Note M for discussion of the acquisition completed during the second quarter of fiscal 2013

(2) Total accumulated goodwill impairment as of August 31, 2013, is $18.3 million

Schedule of Carrying Amounts of Intangible Assets

The carrying amounts of intangible assets, which all relate to the AutoAnything acquisition, are included in Other long-term assets as follows:

(in thousands)	Estimated Useful Life		Gross Carrying Amount		Accumulated Amortization			Impairment			Net Carrying Amount
Technology		5 years	$	9,700	$	(1,365	)	$	—		$	8,335
Noncompete agreement		5 years		1,300		(183	)		—			1,117
Customer relationships		10 years		19,000		(1,336	)		—			17,664
Trade name		Indefinite		28,700		—			(4,100	)		24,600
			$	58,700	$	(2,884	)	$	(4,100	)	$	51,716

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 August 31, 2013, is estimated as follows:

(in thousands)	Total
2014	$	4,100
2015		4,100
2016		4,100
2017		4,100
2018		2,553
Thereafter		8,163
	$	27,116

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Accrued Expenses and Other - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Aug. 31, 2013
Workers' Compensation and Property [Member]
Loss Contingencies [Line Items]
Maximum limits per claim for self-insured plan, per annum	$ 1.5
Employee Health [Member]
Loss Contingencies [Line Items]
Maximum limits per claim for self-insured plan, per annum	0.5
General, Products Liability, and Vehicle [Member]
Loss Contingencies [Line Items]
Maximum limits per claim for self-insured plan, per annum	$ 1.0

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Accrued Expenses and Other (Tables)

12 Months Ended

Aug. 31, 2013

Text Block [Abstract]

Accrued Expenses

Accrued expenses and other consisted of the following:

(in thousands)	August 31, 2013		August 25, 2012
Medical and casualty insurance claims (current portion)	$	66,133	$	63,484
Accrued compensation, related payroll taxes and benefits		137,165		151,669
Property, sales, and other taxes		90,944		97,542
Accrued interest		40,442		39,220
Accrued gift cards		32,160		29,060
Accrued sales and warranty returns		14,171		17,276
Capital lease obligations		32,246		29,842
Other		54,570		49,992
	$	467,831	$	478,085

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Derivative Financial Instruments - Additional Information (Detail) (USD $)	12 Months Ended			3 Months Ended
	Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011	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	800,000,000	500,000,000	500,000,000	300,000,000		500,000,000
Expiration date of cash flow hedge agreement					Nov. 01, 2012	Apr. 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	11,800,000
Net derivative losses amortized into Interest expense	1,300,000	1,900,000
Net derivative loss expected to be reclassified over next 12 months	$ 182,000

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Pension and Savings Plans - Additional Information (Detail) (USD $)	12 Months Ended
	Aug. 31, 2013 Hedge_Fund_Manager Hedge_Strategies	Aug. 25, 2012	Aug. 27, 2011
Compensation And Retirement Disclosure [Abstract]
Consecutive years of highest compensation used to determine defined benefit pension plan benefits	5 years
Pension plan asset constituted in alternate investment strategies	1.00%
Hedge fund managers diversified over hedge strategies	9
Different hedge strategies	4
Cash contribution in asset allocation	$ 11,000,000	$ 8,700,000
Expected long-term rate of return on plan assets	7.50%	7.50%	8.00%
Plan benefit service cost	0
Annual contributions by the Company to pension plans	16,909,000	15,423,000	34,100,000
Expected contributions to the plans by the Company in fiscal 2014	4,000,000
Percentage of company matching retirement savings plan contributions that vest immediately	100.00%
Percentage of savings option up to qualified earnings	25.00%
Annual contribution by employer towards 401(k) Plan	$ 14,100,000	$ 14,400,000	$ 13,300,000

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Accumulated Other Comprehensive Loss - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2013
Equity [Abstract]
Pension adjustment reflecting actuarial gains	$ 43,106

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Quarterly Summary (Tables)

12 Months Ended

Aug. 31, 2013

Quarterly Financial Information Disclosure [Abstract]

Quarterly Summary

	Twelve Weeks Ended						Seventeen Weeks Ended
(in thousands, except per share data)	November 17, 2012		February 9, 2013		May 4, 2013		August 31, 2013 (2)
Net sales	$	1,991,040	$	1,855,198	$	2,205,878	$	3,095,414
Gross profit		1,031,866		961,981		1,142,713		1,604,376
Operating profit		363,276		317,571		456,030		636,220
Income before income taxes		322,172		276,248		413,939		575,324
Net income		203,452		176,247		265,583		371,199
Basic earnings per share		5.52		4.86		7.39		10.59
Diluted earnings per share		5.41		4.78		7.27		10.42

	Twelve Weeks Ended						Sixteen Weeks Ended
(in thousands, except per share data)	November 19, 2011		February 11, 2012		May 5, 2012		August 25, 2012 (2)
Net sales	$	1,924,341	$	1,804,069	$	2,111,866	$	2,763,585
Gross profit		983,627		926,215		1,089,799		1,432,394
Operating profit		340,934		300,651		427,250		560,056
Income before income taxes		301,840		261,728		387,507		501,911
Net income		191,125		166,930		248,586		323,733
Basic earnings per share		4.79		4.25		6.43		8.65
Diluted earnings per share		4.68		4.15		6.28		8.46

(1) The sum of quarterly amounts may not equal the annual amounts reported due to rounding. In addition, the earnings per share amounts are computed independently for each quarter while the full year is based on the annual weighted average shares outstanding.

(2) The fourth quarter for fiscal 2013 is based on a 17-week period while fiscal 2012 is based on a 16-week period. All other quarters presented are based on a 12-week period.

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Interest Expense - Net Interest Expense (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011
Other Income And Expenses [Abstract]
Interest expense	$ 188,324	$ 178,547	$ 173,674
Interest income	(1,606)	(1,397)	(2,058)
Capitalized interest	(1,303)	(1,245)	(1,059)
Net Interest Expense	$ 185,415	$ 175,905	$ 170,557

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Commitments and Contingencies

12 Months Ended

Aug. 31, 2013

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

Note P – Commitments and Contingencies

Construction commitments, primarily for new stores, totaled approximately $21.0 million at August 31, 2013.

The Company had $145.4 million in outstanding standby letters of credit and $30.7 million in surety bonds as of August 31, 2013, which all have expiration periods of less than one year. A substantial portion of the outstanding standby letters of credit (which are primarily renewed on an annual basis) and surety bonds are used to cover reimbursement obligations to our workers’ compensation carriers. There are no additional contingent liabilities associated with these instruments as the underlying liabilities are already reflected in the consolidated balance sheet. The standby letters of credit and surety bonds arrangements have automatic renewal clauses.

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Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Aug. 31, 2013	Aug. 25, 2012
Statement Of Financial Position [Abstract]
Preferred stock, shares authorized	1,000	1,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	200,000	200,000
Common stock, shares issued	36,768	39,869
Common stock, shares outstanding	34,293	37,028

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Consolidated Statements of Stockholders' Deficit (USD $) In Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained (Deficit) Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]
Balance at Aug. 28, 2010	$ (738,765)	$ 501	$ 557,955	$ (245,344)	$ (106,468)	$ (945,409)
Balance, Shares at Aug. 28, 2010		50,061
Net income	848,974			848,974
Total other comprehensive (loss) income	(13,223)				(13,223)
Purchase of treasury stock	(1,466,802)					(1,466,802)
Retirement of treasury shares		(66)	(82,150)	(1,247,627)		1,329,843
Retirement of treasury shares, shares		(6,577)
Sale of common stock under stock options and stock purchase plans	55,846	6	55,840
Sale of common stock under stock options and stock purchase plans, Shares		600
Share-based compensation expense	24,794		24,794
Income tax benefit from exercise of stock options	34,945		34,945
Other	(1)			(1)
Balance at Aug. 27, 2011	(1,254,232)	441	591,384	(643,998)	(119,691)	(1,082,368)
Balance, shares at Aug. 27, 2011		44,084
Net income	930,373			930,373
Total other comprehensive (loss) income	(32,322)				(32,322)
Purchase of treasury stock	(1,362,869)					(1,362,869)
Retirement of treasury shares		(49)	(72,512)	(1,319,572)		1,392,133
Retirement of treasury shares, shares	(4,900)	(4,929)
Sale of common stock under stock options and stock purchase plans	75,343	7	75,336
Sale of common stock under stock options and stock purchase plans, Shares		714
Share-based compensation expense	32,641		32,641
Income tax benefit from exercise of stock options	63,041		63,041
Balance at Aug. 25, 2012	(1,548,025)	399	689,890	(1,033,197)	(152,013)	(1,053,104)
Balance, shares at Aug. 25, 2012	39,869	39,869
Net income	1,016,480			1,016,480
Total other comprehensive (loss) income	31,225				31,225
Purchase of treasury stock	(1,387,315)					(1,387,315)
Retirement of treasury shares		(39)	(75,743)	(1,362,218)		1,438,000
Retirement of treasury shares, shares	(3,900)	(3,876)
Sale of common stock under stock options and stock purchase plans	97,154	8	97,146
Sale of common stock under stock options and stock purchase plans, Shares		775
Share-based compensation expense	36,412		36,412
Income tax benefit from exercise of stock options	66,752		66,752
Other	(2)			(1)		(1)
Balance at Aug. 31, 2013	$ (1,687,319)	$ 368	$ 814,457	$ (1,378,936)	$ (120,788)	$ (1,002,420)
Balance, shares at Aug. 31, 2013	36,768	36,768

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Share-Based Payments

12 Months Ended

Aug. 31, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Share-Based Payments

Note B – Share-Based Payments

Total share-based compensation expense (a component of Operating, selling, general and administrative expenses) was $37.3 million for fiscal 2013, $33.4 million for fiscal 2012, and $26.6 million for fiscal 2011. As of August 31, 2013, share-based compensation expense for unvested awards not yet recognized in earnings is $25.9 million and will be recognized over a weighted average period of 2.5 years. Tax deductions in excess of recognized compensation cost are classified as a financing cash inflow.

On December 15, 2010, the Company’s stockholders approved the 2011 Equity Incentive Award Plan (the “2011 Plan”), allowing the Company to provide equity-based compensation to non-employee directors and employees for their service to AutoZone or its subsidiaries or affiliates. Under the 2011 Plan, participants may receive equity-based compensation in the form of stock options, stock appreciation rights, restricted stock, restricted stock units, dividend equivalents, deferred stock, stock payments, performance share awards and other incentive awards structured by the Board and the Compensation Committee of the Board. Prior to the Company’s adoption of the 2011 Plan, equity-based compensation was provided to employees under the 2006 Stock Option Plan and to non-employee directors under the 2003 Director Compensation Plan (the “2003 Comp Plan”) and the 2003 Director Stock Option Plan (the “2003 Option Plan”).

The Company grants options to purchase common stock to certain of its employees under its plan at prices equal to the market value of the stock on the date of grant. Options have a term of 10 years or 10 years and one day from grant date. Employee options generally vest in equal annual installments on the first, second, third and fourth anniversaries of the grant date and generally have 30 or 90 days after the service relationship ends, or one year after death, to exercise all vested options. The fair value of each option grant is separately estimated for each vesting date. The fair value of each option is amortized into compensation expense on a straight-line basis between the grant date for the award and each vesting date.

In addition to the 2011 Plan, on December 15, 2010, the Company adopted the 2011 Director Compensation Program (the “2011 Program”), which states that non-employee directors will receive their compensation in awards of restricted stock units under the 2011 Plan. Under the 2011 Program, restricted stock units are granted the first day of each calendar quarter. The number of restricted stock units granted each quarter is determined by dividing one-fourth of the amount of the annual retainer by the fair market value of the shares of common stock as of the grant date. The restricted stock units are fully vested on the date they are issued and are paid in shares of the Company’s common stock subsequent to the non-employee director ceasing to be a member of the Board.

The 2011 Program replaced the 2003 Comp Plan and the 2003 Option Plan. Under the 2003 Comp Plan, non-employee directors could receive no more than one-half of their director fees immediately in cash, and the remainder of the fees was required to be taken in common stock or stock appreciation rights. The director had the option to elect to receive up to 100% of the fees in stock or defer all or part of the fees in units with value equivalent to the value of shares of common stock as of the grant date. At August 31, 2013, the Company has $7.6 million accrued related to 17,990 outstanding units issued under the 2003 Comp Plan and prior plans, and there was $6.7 million accrued related to 18,241 outstanding units issued as of August 25, 2012. No additional shares of stock or units will be issued in future years under the 2003 Comp Plan.

Under the 2003 Option Plan, each non-employee director received an option grant on January 1 of each year, and each new non-employee director received an option to purchase 3,000 shares upon election to the Board, plus a portion of the annual directors’ option grant prorated for the portion of the year actually served. These stock option grants were made at the fair market value as of the grant date and generally vested three years from the grant date. There were 51,000 and 104,679 outstanding options under the 2003 Option Plan as of August 31, 2013 and August 25, 2012, respectively. No additional shares of stock or units will be issued in future years under the 2003 Option Plan.

The Company has estimated the fair value of all stock option awards as of the date of the grant by applying the Black-Scholes-Merton multiple-option pricing valuation model. The application of this valuation model involves assumptions that are judgmental and highly sensitive in the determination of compensation expense. The following table presents the weighted average for key assumptions used in determining the fair value of options granted and the related share-based compensation expense:

	Year Ended
	August 31, 2013			August 25, 2012			August 27, 2011
Expected price volatility		29	%		28	%		31	%
Risk-free interest rates		0.5	%		0.7	%		1.0	%
Weighted average expected lives (in years)		5.2			5.4			4.3
Forfeiture rate		10	%		10	%		10	%
Dividend yield		0	%		0	%		0	%

The following methodologies were applied in developing the assumptions used in determining the fair value of options granted:

Expected price volatility – This is a measure of the amount by which a price has fluctuated or is expected to fluctuate. The Company uses actual historical changes in the market value of its stock to calculate the volatility assumption as it is management’s belief that this is the best indicator of future volatility. The Company calculates daily market value changes from the date of grant over a past period representative of the expected life of the options to determine volatility. An increase in the expected volatility will increase compensation expense.

Risk-free interest rate – This is the U.S. Treasury rate for the week of the grant having a term equal to the expected life of the option. An increase in the risk-free interest rate will increase compensation expense.

Expected lives – This is the period of time over which the options granted are expected to remain outstanding and is based on historical experience. Separate groups of employees that have similar historical exercise behavior are considered separately for valuation purposes. Options granted have a maximum term of ten years or ten years and one day. An increase in the expected life will increase compensation expense.

Forfeiture rate – This is the estimated percentage of options granted that are expected to be forfeited or canceled before becoming fully vested. This estimate is based on historical experience at the time of valuation and reduces expense ratably over the vesting period. An increase in the forfeiture rate will decrease compensation expense. This estimate is evaluated periodically based on the extent to which actual forfeitures differ, or are expected to differ, from the previous estimate.

Dividend yield – The Company has not made any dividend payments nor does it have plans to pay dividends in the foreseeable future. An increase in the dividend yield will decrease compensation expense.

The weighted average grant date fair value of options granted was $98.58 during fiscal 2013, $94.71 during fiscal 2012, and $58.57 during fiscal 2011. The intrinsic value of options exercised was $194.6 million in fiscal 2013, $176.5 million in fiscal 2012, and $100.0 million in fiscal 2011. The total fair value of options vested was $37.3 million in fiscal 2013, $32.6 million in fiscal 2012, and $20.7 million in fiscal 2011.

The Company generally issues new shares when options are exercised. The following table summarizes information about stock option activity for the year ended August 31, 2013:

	Number of Shares			Weighted Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in thousands)
Outstanding – August 25, 2012		2,262,679		$	173.01
Granted		364,160			371.76
Exercised		(773,942	)		128.68
Cancelled		(56,909	)		282.28
Outstanding – August 31, 2013		1,795,988			228.95		6.56	$	343,015
Exercisable		899,079			152.35		5.05		240,584
Expected to vest		896,909			305.74		8.07		92,187
Available for future grants		2,085,615

The Company recognized $1.5 million in expense related to the discount on the selling of shares to employees and executives under various share purchase plans in fiscal 2013, $1.5 million in fiscal 2012 and $1.4 million in fiscal 2011. The Sixth Amended and Restated AutoZone, Inc. Employee Stock Purchase Plan (the “Employee Plan”), which is qualified under Section 423 of the Internal Revenue Code, permits all eligible employees to purchase AutoZone’s common stock at 85% of the lower of the market price of the common stock on the first day or last day of each calendar quarter through payroll deductions. Maximum permitted annual purchases are $15,000 per employee or 10 percent of compensation, whichever is less. Under the Employee Plan, 18,228 shares were sold to employees in fiscal 2013, 19,403 shares were sold to employees in fiscal 2012, and 21,608 shares were sold to employees in fiscal 2011. The Company repurchased 22,915 shares at fair value in fiscal 2013, 24,113 shares at fair value in fiscal 2012, and 30,864 shares at fair value in fiscal 2011 from employees electing to sell their stock. Issuances of shares under the Employee Plan are netted against repurchases and such repurchases are not included in share repurchases disclosed in “Note K – Stock Repurchase Program.” At August 31, 2013, 234,744 shares of common stock were reserved for future issuance under the Employee Plan.

Once executives have reached the maximum purchases under the Employee Plan, the Fifth Amended and Restated Executive Stock Purchase Plan (the “Executive Plan”) permits all eligible executives to purchase AutoZone’s common stock up to 25 percent of his or her annual salary and bonus. Purchases under the Executive Plan were 3,454 shares in fiscal 2013, 3,937 shares in fiscal 2012, and 1,719 shares in fiscal 2011. At August 31, 2013, 248,953 shares of common stock were reserved for future issuance under the Executive Plan.

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Pension and Savings Plans - Weighted Average Asset Allocation for Pension Plan Assets (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Asset allocation fair value	$ 208,120	$ 181,409	$ 156,883
Asset allocation actual	100.00%	100.00%
Asset allocation target	100.00%	100.00%
U.S. Equities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Asset allocation fair value	57,931	51,101
Asset allocation actual	27.90%	28.20%
Asset allocation target	30.00%	30.00%
International Equities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Asset allocation fair value	38,145	31,767
Asset allocation actual	18.30%	17.50%
Asset allocation target	20.00%	20.00%
Emerging Equities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Asset allocation fair value	19,030	16,471
Asset allocation actual	9.10%	9.10%
Asset allocation target	10.00%	10.00%
High Yield Equities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Asset allocation fair value	19,858	17,378
Asset allocation actual	9.50%	9.60%
Asset allocation target	10.00%	10.00%
Alternative Investments [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Asset allocation fair value	1,226	2,404
Asset allocation actual	0.60%	1.30%
Fixed Income Securities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Asset allocation fair value	59,500	47,667
Asset allocation actual	28.60%	26.30%
Asset allocation target	30.00%	30.00%
Cash and Cash Equivalents [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Asset allocation fair value	12,430	14,621
Asset allocation actual	6.00%	8.00%
Level 1 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Asset allocation fair value
Level 1 [Member] | U.S. Equities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Asset allocation fair value
Level 1 [Member] | International Equities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Asset allocation fair value
Level 1 [Member] | Emerging Equities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Asset allocation fair value
Level 1 [Member] | High Yield Equities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Asset allocation fair value
Level 1 [Member] | Alternative Investments [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Asset allocation fair value
Level 1 [Member] | Fixed Income Securities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Asset allocation fair value
Level 1 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Asset allocation fair value
Level 2 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Asset allocation fair value	206,894	179,005
Level 2 [Member] | U.S. Equities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Asset allocation fair value	57,931	51,101
Level 2 [Member] | International Equities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Asset allocation fair value	38,145	31,767
Level 2 [Member] | Emerging Equities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Asset allocation fair value	19,030	16,471
Level 2 [Member] | High Yield Equities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Asset allocation fair value	19,858	17,378
Level 2 [Member] | Fixed Income Securities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Asset allocation fair value	59,500	47,667
Level 2 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Asset allocation fair value	12,430	14,621
Level 3 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Asset allocation fair value	1,226	2,404
Level 3 [Member] | Alternative Investments [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Asset allocation fair value	$ 1,226	$ 2,404

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Consolidated Statements of Stockholders' Deficit (Parenthetical) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011
Purchase of treasury stock, shares	3,511	3,795	5,598
Treasury Stock [Member]
Purchase of treasury stock, shares	3,511	3,795	5,598

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Leases (Tables)

12 Months Ended

Aug. 31, 2013

Leases [Abstract]

Future Minimum Annual Rental Commitments Under Non-Cancelable Operating Leases and Capital Leases

Future minimum annual rental commitments under non-cancelable operating leases and capital leases were as follows at the end of fiscal 2013:

(in thousands)	Operating Leases		Capital Leases
2014	$	228,747	$	32,246
2015		220,877		30,943
2016		204,112		24,363
2017		187,312		16,388
2018		170,745		5,283
Thereafter		945,429		—
Total minimum payments required	$	1,957,222		109,223
Less: Interest				(3,052	)
Present value of minimum capital lease payments			$	106,171

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Quarterly Summary

12 Months Ended

Aug. 31, 2013

Quarterly Financial Information Disclosure [Abstract]

Quarterly Summary

Note S – Quarterly Summary ⁽¹⁾

(Unaudited)

	Twelve Weeks Ended						Seventeen Weeks Ended
(in thousands, except per share data)	November 17, 2012		February 9, 2013		May 4, 2013		August 31, 2013 (2)
Net sales	$	1,991,040	$	1,855,198	$	2,205,878	$	3,095,414
Gross profit		1,031,866		961,981		1,142,713		1,604,376
Operating profit		363,276		317,571		456,030		636,220
Income before income taxes		322,172		276,248		413,939		575,324
Net income		203,452		176,247		265,583		371,199
Basic earnings per share		5.52		4.86		7.39		10.59
Diluted earnings per share		5.41		4.78		7.27		10.42

	Twelve Weeks Ended						Sixteen Weeks Ended
(in thousands, except per share data)	November 19, 2011		February 11, 2012		May 5, 2012		August 25, 2012 (2)
Net sales	$	1,924,341	$	1,804,069	$	2,111,866	$	2,763,585
Gross profit		983,627		926,215		1,089,799		1,432,394
Operating profit		340,934		300,651		427,250		560,056
Income before income taxes		301,840		261,728		387,507		501,911
Net income		191,125		166,930		248,586		323,733
Basic earnings per share		4.79		4.25		6.43		8.65
Diluted earnings per share		4.68		4.15		6.28		8.46

(1) The sum of quarterly amounts may not equal the annual amounts reported due to rounding. In addition, the earnings per share amounts are computed independently for each quarter while the full year is based on the annual weighted average shares outstanding.

(2) The fourth quarter for fiscal 2013 is based on a 17-week period while fiscal 2012 is based on a 16-week period. All other quarters presented are based on a 12-week period.

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Income Taxes (Tables)

12 Months Ended

Aug. 31, 2013

Income Tax Disclosure [Abstract]

Components of Income from Continuing Operations

The components of income from continuing operations before income taxes are as follows:

	Year Ended
(in thousands)	August 31, 2013		August 25, 2012		August 27, 2011
Domestic	$	1,486,386	$	1,373,142	$	1,255,127
International		101,297		79,844		69,119
	$	1,587,683	$	1,452,986	$	1,324,246

Provision for Income Tax Expense

The provision for income tax expense consisted of the following:

	Year Ended
(in thousands)	August 31, 2013			August 25, 2012			August 27, 2011
Current:
Federal	$	466,803		$	424,895		$	364,117
State		46,494			47,386			39,473
International		38,202			24,775			27,015
		551,499			497,056			430,605
Deferred:
Federal		16,816			33,679			57,625
State		3,139			(2,822	)		(5,031	)
International		(251	)		(5,300	)		(7,927	)
		19,704			25,557			44,667
Income tax expense	$	571,203		$	522,613		$	475,272

Reconciliation of Provision for Income Taxes

A reconciliation of the provision for income taxes to the amount computed by applying the federal statutory tax rate of 35% to income before income taxes is as follows:

	Year Ended
(in thousands)	August 31, 2013			August 25, 2012			August 27, 2011
Federal tax at statutory U.S. income tax rate		35.0	%		35.0	%		35.0	%
State income taxes, net		2.0	%		2.0	%		1.7	%
Other		(1.0	%)		(1.0	%)		(0.8	%)
Effective tax rate		36.0	%		36.0	%		35.9	%

Significant Components of Company's Deferred Tax Assets and Liabilities

Significant components of the Company’s deferred tax assets and liabilities were as follows:

(in thousands)	August 31, 2013			August 25, 2012
Deferred tax assets:
Net operating loss and credit carryforwards	$	41,785		$	36,605
Insurance reserves		16,237			18,185
Accrued benefits		67,350			63,320
Pension		18,004			43,904
Other		45,597			41,658
Total deferred tax assets		188,973			203,672
Less: Valuation allowances		(11,593	)		(9,532	)
		177,380			194,140
Deferred tax liabilities:
Property and equipment		(84,512	)		(67,480	)
Inventory		(262,653	)		(244,414	)
Other		(27,341	)		(31,437	)
Total deferred tax liabilities		(374,506	)		(343,331	)
Net deferred tax liability	$	(197,126	)	$	(149,191	)

Reconciliation of Unrecognized Tax Benefits

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:

(in thousands)	August 31, 2013			August 25, 2012
Beginning balance	$	27,715		$	29,906
Additions based on tax positions related to the current year		7,015			6,869
Additions for tax positions of prior years		2,758			44
Reductions for tax positions of prior years		(470	)		(1,687	)
Reductions due to settlements		(3,019	)		(4,586	)
Reductions due to statute of limitations		(3,356	)		(2,831	)
Ending balance	$	30,643		$	27,715

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Stock Repurchase Program - Summarize Company's Share Repurchase Activity (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011
Equity [Abstract]
Amount	$ 1,387,315	$ 1,362,869	$ 1,466,802
Shares	3,511	3,795	5,598

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Interest Expense (Tables)

12 Months Ended

Aug. 31, 2013

Banking And Thrift Interest [Abstract]

Net Interest Expense

Net interest expense consisted of the following:

	Year Ended
(in thousands)	August 31, 2013			August 25, 2012			August 27, 2011
Interest expense	$	188,324		$	178,547		$	173,674
Interest income		(1,606	)		(1,397	)		(2,058	)
Capitalized interest		(1,303	)		(1,245	)		(1,059	)
	$	185,415		$	175,905		$	170,557

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Stock Repurchase Program - Additional Information (Detail) (USD $)	1 Months Ended	12 Months Ended									188 Months Ended	12 Months Ended
	Jun. 11, 2013	Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011	Aug. 31, 2013 Retained (Deficit) Earnings [Member]	Aug. 25, 2012 Retained (Deficit) Earnings [Member]	Aug. 27, 2011 Retained (Deficit) Earnings [Member]	Aug. 31, 2013 Additional Paid-In Capital [Member]	Aug. 25, 2012 Additional Paid-In Capital [Member]	Aug. 27, 2011 Additional Paid-In Capital [Member]	Aug. 31, 2013 January 1998 to August 31, 2013 [Member]	Aug. 31, 2013 Subsequent Event [Member]
Stock Repurchase Program [Line Items]
Stock repurchase authorized amended value	$ 12,650,000,000	$ 13,400,000,000
Stock repurchased during period, shares		3,511,000	3,795,000	5,598,000							134,600,000
Purchase of treasury stock		1,387,315,000	1,362,869,000	1,466,802,000							12,930,000,000
Share of treasury stock retired		3,900,000	4,900,000
Treasury stock retired, cost method					(1,362,218,000)	(1,319,572,000)	(1,247,627,000)	(75,743,000)	(72,512,000)	(82,150,000)
Stock repurchased cumulative, shares												355,150
Stock repurchased during period, amount												$ 149,800,000

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Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Aug. 31, 2013	Aug. 25, 2012
Income Tax Disclosure [Abstract]
Deferred taxes are not provided for temporary differences	$ 260,000,000	$ 195,800,000
Deferred tax assets from net operating loss carryforwards	8,700,000	12,300,000
Future taxable income	75,500,000	76,600,000
Expiration date of NOLs start year	2014
Expiration date of NOLs end year	2032
Deferred tax assets for income tax credit carryforwards	33,100,000	24,300,000
Expiration date of tax credit carryforwards start year	2014
Expiration date of tax credit carryforwards end year	2027
Operating loss carryforwards expiration period description	Fiscal 2014 through 2032
Other tax credit carryforwards expiration period description	Fiscal 2014 through 2027
Valuation allowances on deferred tax assets	11,593,000	9,532,000
Increase in valuation allowance	2,100,000
Unrecognized tax benefits , if recognized would reduce effective tax rate, amount	20,100,000
Accrued for payment of interest and penalties associated with unrecognized tax benefits	4,700,000	4,100,000
Amount of unrecognized tax benefits that could be reduce over next twelve months	$ 1,500,000

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Income Taxes - Components of Income from Continuing Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended						4 Months Ended		12 Months Ended
	May 04, 2013	Feb. 09, 2013	Nov. 17, 2012	May 05, 2012	Feb. 11, 2012	Nov. 19, 2011	Aug. 31, 2013	Aug. 25, 2012	Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011
Income Tax Disclosure [Abstract]
Domestic									$ 1,486,386	$ 1,373,142	$ 1,255,127
International									101,297	79,844	69,119
Income before income taxes	$ 413,939	$ 276,248	$ 322,172	$ 387,507	$ 261,728	$ 301,840	$ 575,324	$ 501,911	$ 1,587,683	$ 1,452,986	$ 1,324,246

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Share-Based Payments - Additional Information (Detail) (USD $)	12 Months Ended
	Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense related to stock options and share purchase plans	$ 37,300,000	$ 33,400,000	$ 26,600,000
Share-based compensation expense for unvested awards not yet recognized in earnings	25,900,000
Weighted average period recognition of share-based compensation expense for unvested awards	2 years 6 months
Term of options from grant date	10 years or 10 years and one day
Exercise period of vested options after death	1 year
Restricted stock units granted under Director Compensation Program, description	Under the 2011 Program, restricted stock units are granted the first day of each calendar quarter. The number of restricted stock units granted each quarter is determined by dividing one-fourth of the amount of the annual retainer by the fair market value of the shares of common stock as of the grant date.
Maximum limit of the fees a Director can elect to receive in stock	100.00%
Accrued Director fees	7,600,000	6,700,000
Accrued Director fees in shares	17,990	18,241
Additional shares of stock or units	0
Number of shares for which each new non-employee director receives an option to purchase	3,000
Outstanding options	1,795,988	2,262,679
Common stock reserved for future issuance	234,744
Weighted average grant date fair value of options granted	$ 98.58	$ 94.71	$ 58.57
Intrinsic value of options exercised	194,600,000	176,500,000	100,000,000
Total fair value of options vested	37,300,000	32,600,000	20,700,000
Expense related to the discount on the selling of shares to employees and executives	1,500,000	1,500,000	1,400,000
Percent of market price at which employees permitted to purchase through payroll deductions	85.00%
Maximum permitted annual purchases per employee	$ 15,000
Maximum permitted annual purchases per employee, Percent of Compensation	10.00%
Shares sold to employees under employee stock purchase plan	18,228	19,403	21,608
Shares purchased from employees at fair value	22,915	24,113	30,864
Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding options	51,000	104,679
Common stock reserved for future issuance	0
Share based compensation grant date vesting period	3 years
Restated Executive Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance	248,953
Maximum permitted annual purchases per employee, Percent of Compensation	25.00%
Shares sold to employees under employee stock purchase plan	3,454	3,937	1,719
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise period of vested options after service period	30 days
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise period of vested options after service period	90 days

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Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2013		Aug. 25, 2012		Aug. 27, 2011
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 1,016,480		$ 930,373		$ 848,974
Other comprehensive income (loss):
Pension liability adjustments, net of taxes	43,106	[1]	(17,262)	[1]	(17,346)	[1]
Foreign currency translation adjustments	(12,216)		(13,866)		8,347
Unrealized loss on marketable securities, net of taxes	(376)	[2]	(128)	[2]	(171)	[2]
Net derivative activity, net of taxes	711	[3]	(1,066)	[3]	(4,053)	[3]
Total other comprehensive income (loss)	31,225		(32,322)		(13,223)
Comprehensive income	$ 1,047,705		$ 898,051		$ 835,751

[1] Pension liability adjustments are presented net of taxes of $27,972 in 2013, $29,744 in 2012, and $3,998 in 2011

[2] Unrealized losses on marketable securities are presented net of taxes of $202 in 2013, $69 in 2012 and $91 in 2011

[3] Net derivative activities are presented net of taxes of $440 in 2013, $4,800 in 2012, and $0 in 2011

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Fair Value Measurements

12 Months Ended

Aug. 31, 2013

Fair Value Disclosures [Abstract]

Fair Value Measurements

Note E – Fair Value Measurements

The Company has adopted ASC Topic 820, Fair Value Measurement, which defines fair value, establishes a framework for measuring fair value in generally accepted accounting principles (“GAAP”) and expands disclosure requirements about fair value measurements. This standard 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. ASC Topic 820 establishes a framework for measuring fair value by creating a hierarchy of valuation inputs used to measure fair value, and although it does not require additional fair value measurements, it applies to other accounting pronouncements that require or permit fair value measurements.

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:

	August 31, 2013
(in thousands)	Level 1		Level 2		Level 3			Fair Value
Other current assets	$	16,386	$	24	$	—		$	16,410
Other long-term assets		49,011		16,740		—			65,751
	$	65,397	$	16,764	$	—		$	82,161
Contingent consideration	$	—	$	—	$	(242	)	$	(242	)

	August 25, 2012
(in thousands)	Level 1		Level 2			Level 3		Fair Value
Other current assets	$	22,515	$	—		$	—	$	22,515
Other long-term assets		40,424		13,275			—		53,699
	$	62,939	$	13,275		$	—	$	76,214
Accrued expenses and other	$	—	$	(4,915	)	$	—	$	(4,915	)

At August 31, 2013, the fair value measurement amounts for assets and liabilities recorded in the accompanying Consolidated Balance Sheet consisted of short-term marketable securities of $16.4 million, which are included within Other current assets and long-term marketable securities of $65.8 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. A discussion on how the Company’s cash flow hedges are valued is included in “Note H – Derivative Financial Instruments,” while the fair value of the Company’s pension plan assets are disclosed in “Note L – Pension and Savings Plans.”

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. 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 remeasurement 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.

During the fourth quarter of fiscal 2013, the Company determined AutoAnything is not likely to achieve the operating income targets necessary to earn the contingent consideration. Therefore, the contingent consideration was adjusted to reflect the fair value at August 31, 2013 of $0.2 million, resulting in a decrease to the contingent consideration liability of $23.3 million during the fourth quarter of fiscal 2013. As of August 31, 2013, the contingent liability is reflected as a current liability of $0.1 million in Accrued expenses and other and a non-current liability of $0.1 million in Other long-term liabilities in the accompanying Consolidated Balance Sheet. A discussion of the acquisition is included in “Note M – Acquisition.”

The change in the fair value of the contingent consideration liability is summarized as follows:

(in thousands)	Fiscal Year Ended August 31, 2013
Fair value – beginning of period	$	—
Fair value of contingent consideration issued during the period		(22,678	)
Change in fair value		22,436
Fair value – end of period	$	(242	)

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

Non-financial assets are required to be measured at fair value on a non-recurring basis in certain circumstances, including the event of impairment. The assets could include assets acquired in an acquisition as well as property, plant and equipment that are determined to be impaired. During the fourth quarter of fiscal 2013, the Company recorded a goodwill impairment charge of $18.3 million related to the acquisition of AutoAnything and an impairment charge of $4.1 million of AutoAnything’s trade name in order to record these assets at fair value. The fair value remeasurements are based on significant inputs not observable in the market and thus represent a Level 3 measurement as defined in the fair value hierarchy. See “Note N – Goodwill and Intangibles” for further discussion. During fiscal 2013 and fiscal 2012, the Company did not have any other 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. The fair value of the Company’s debt is disclosed in “Note I – Financing.”

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Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Aug. 31, 2013	Aug. 25, 2012
Current assets:
Cash and cash equivalents	$ 142,191	$ 103,093
Accounts receivable	171,638	161,375
Merchandise inventories	2,861,014	2,627,983
Other current assets	101,443	85,649
Deferred income taxes	1,727	846
Total current assets	3,278,013	2,978,946
Property and equipment:
Land	862,565	800,175
Buildings and improvements	2,607,751	2,400,895
Equipment	1,122,821	1,016,835
Leasehold improvements	341,182	314,559
Construction in progress	124,206	127,297
Property and equipment	5,058,525	4,659,761
Less: Accumulated depreciation and amortization	1,987,164	1,803,833
Property and equipment, net	3,071,361	2,855,928
Goodwill	367,829	302,645
Deferred income taxes	4,069	33,796
Other long-term assets	170,817	94,324
Other long-term assets, total	542,715	430,765
Assets	6,892,089	6,265,639
Current liabilities:
Accounts payable	3,307,535	2,926,740
Accrued expenses and other	467,831	478,085
Income taxes payable	17,129	17,053
Deferred income taxes	202,922	183,833
Short-term borrowings	173,733	49,881
Total current liabilities	4,169,150	3,655,592
Long-term debt	4,013,267	3,718,302
Other long-term liabilities	396,991	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; 36,768 shares issued and 34,293 shares outstanding in 2013 and 39,869 shares issued and 37,028 shares outstanding in 2012	368	399
Additional paid-in capital	814,457	689,890
Retained deficit	(1,378,936)	(1,033,197)
Accumulated other comprehensive loss	(120,788)	(152,013)
Treasury stock, at cost	(1,002,420)	(1,053,104)
Total stockholders' deficit	(1,687,319)	(1,548,025)
Liabilities and Stockholders' Deficit	$ 6,892,089	$ 6,265,639

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Fair Value Measurements - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended		12 Months Ended					1 Months Ended	3 Months Ended
	Dec. 19, 2012	Aug. 31, 2013	Aug. 31, 2013	Aug. 31, 2013 Trade Name [Member]	Aug. 31, 2013 Accrued Expenses and Other [Member]	Aug. 31, 2013 Other Long Term Liabilities [Member]	Aug. 31, 2013 Fair Value, Measurements, Recurring [Member]	Aug. 25, 2013 Fair Value, Measurements, Recurring [Member]	Dec. 19, 2012 AutoAnything [Member]	Aug. 31, 2013 AutoAnything [Member]	Aug. 31, 2013 AutoAnything [Member] Trade Name [Member]	Dec. 19, 2012 AutoAnything [Member] Maximum [Member]	Dec. 19, 2012 AutoAnything [Member] First Year [Member]	Dec. 19, 2012 AutoAnything [Member] Second Year [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term marketable securities							$ 16,410,000	$ 22,515,000
Long-term marketable securities							65,751,000	53,699,000
Acquisition of assets and liabilities									150,000,000
Initial cash payment	115,000,000								115,000,000
Holdback payment for working capital true-ups	5,000,000								5,000,000
Contingent payments, total									30,000,000			30,000,000	10,000,000	30,000,000
Contingent consideration adjusted to reflect fair value		200,000	200,000		100,000	100,000			22,700,000	200,000
Decrease in contingent consideration liability		23,300,000								23,300,000
Goodwill impairment charge			18,300,000							18,300,000
Impairment charge				$ 4,100,000							$ 4,100,000

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Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011
Income Statement [Abstract]
Net sales	$ 9,147,530	$ 8,603,863	$ 8,072,973
Cost of sales, including warehouse and delivery expenses	4,406,595	4,171,827	3,953,510
Gross profit	4,740,935	4,432,036	4,119,463
Operating, selling, general and administrative expenses	2,967,837	2,803,145	2,624,660
Operating profit	1,773,098	1,628,891	1,494,803
Interest expense, net	185,415	175,905	170,557
Income before income taxes	1,587,683	1,452,986	1,324,246
Income tax expense	571,203	522,613	475,272
Net income	$ 1,016,480	$ 930,373	$ 848,974
Weighted average shares for basic earnings per share	35,943	38,696	42,632
Effect of dilutive stock equivalents	638	929	971
Adjusted weighted average shares for diluted earnings per share	36,581	39,625	43,603
Basic earnings per share	$ 28.28	$ 24.04	$ 19.91
Diluted earnings per share	$ 27.79	$ 23.48	$ 19.47

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Income Taxes - Provision for Income Tax Expense (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011
Current:
Federal	$ 466,803	$ 424,895	$ 364,117
State	46,494	47,386	39,473
International	38,202	24,775	27,015
Total	551,499	497,056	430,605
Deferred:
Federal	16,816	33,679	57,625
State	3,139	(2,822)	(5,031)
International	(251)	(5,300)	(7,927)
Total	19,704	25,557	44,667
Income tax expense	$ 571,203	$ 522,613	$ 475,272

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Acquisition - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended		1 Months Ended	3 Months Ended
	Dec. 19, 2012	Aug. 31, 2013	Aug. 25, 2012	Dec. 19, 2012 AutoAnything [Member]	Aug. 31, 2013 AutoAnything [Member]	May 04, 2013 AutoAnything [Member]
Business Acquisition [Line Items]
Acquisition of assets and liabilities				$ 150,000,000
Initial cash payment	115,000,000			115,000,000
Holdback payment for working capital true-ups	5,000,000			5,000,000
Repayment of holdback payment for working capital true-ups						1,100,000
Contingent payments, total				30,000,000
Purchase price allocation, goodwill		367,829,000	302,645,000	83,400,000
Purchase price allocation, intangible assets				58,700,000
Contingent consideration adjusted to reflect fair value		200,000		22,700,000	200,000
Decrease in contingent consideration liability		$ 23,300,000			$ 23,300,000

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Pension and Savings Plans - Plan's Funded Status and Amounts Recognized in Company's Consolidated Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011
Change in Projected Benefit Obligation:
Projected benefit obligation at beginning of year	$ 305,206	$ 241,645
Interest cost	11,746	12,214	11,135
Actuarial (gains) losses	(53,756)	56,749
Benefits paid	(6,416)	(5,402)
Benefit obligations at end of year	256,780	305,206	241,645
Change in Plan Assets:
Beginning balance	181,409	156,883
Actual return on plan assets	16,218	14,505
Employer contributions	16,909	15,423	34,100
Benefits paid	(6,416)	(5,402)
Ending balance	208,120	181,409	156,883
Amount Recognized in the Statement of Financial Position:
Current liabilities	(124)	(30)
Long-term liabilities	(48,536)	(123,767)
Net amount recognized	(48,660)	(123,797)
Amount Recognized in Accumulated Other Comprehensive Loss and not yet reflected in Net Periodic Benefit Cost:
Net actuarial loss	(83,601)	(154,678)
Accumulated other comprehensive loss	(83,601)	(154,678)
Amount Recognized in Accumulated Other Comprehensive Loss and not yet reflected in Net Periodic Benefit Cost and expected to be amortized in next year's Net Periodic Benefit Cost:
Net actuarial loss	(6,879)	(14,721)
Amount recognized	$ (6,879)	$ (14,721)

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Significant Accounting Policies (Policies)

12 Months Ended

Aug. 31, 2013

Accounting Policies [Abstract]

Business

Business: AutoZone, Inc. and its wholly owned subsidiaries (“AutoZone” or the “Company”) are principally a retailer and distributor of automotive parts and accessories. At the end of fiscal 2013, the Company operated 4,836 stores in the United States (“U.S.”), including Puerto Rico; 362 stores in Mexico; and three stores in 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. In 3,421 of the domestic stores, select stores in Mexico, and the stores in Brazil, at the end of fiscal 2013, the Company had 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. The Company also sells the ALLDATA brand automotive diagnostic and repair software through www.alldata.com. Additionally, the Company sells automotive hard parts, maintenance items, accessories, and non-automotive products through www.autozone.com, and accessories and performance parts through www.autoanything.com, and its commercial customers can make purchases through www.autozonepro.com. The Company does not derive revenue from automotive repair or installation services.

Fiscal Year

Fiscal Year: The Company’s fiscal year consists of 52 or 53 weeks ending on the last Saturday in August. Fiscal 2013 represented 53 weeks and fiscal 2012 and 2011 represented 52 weeks.

Basis of Presentation

Basis of Presentation: The consolidated financial statements include the accounts of AutoZone, Inc. and its wholly owned subsidiaries. All significant intercompany transactions and balances have been eliminated in consolidation.

Use of Estimates

Use of Estimates: Management of the Company has made a number of estimates and assumptions relating to the reporting of assets and liabilities and the disclosure of contingent liabilities to prepare these financial statements. Actual results could differ from those estimates.

Cash and Cash Equivalents

Cash and Cash Equivalents: Cash equivalents consist of investments with original maturities of 90 days or less at the date of purchase. Cash equivalents include proceeds due from credit and debit card transactions with settlement terms of less than 5 days. Credit and debit card receivables included within cash and cash equivalents were $39.8 million at August 31, 2013 and $34.0 million at August 25, 2012.

Cash balances are held in various locations around the world. Of the $142.2 million and $103.1 million of cash and cash equivalents at August 31, 2013, and August 25, 2012, respectively, $38.2 million and $7.8 million, respectively, were held outside of the U.S. and were generally utilized to support liquidity needs in foreign operations. The Company intends to continue to permanently reinvest the cash held outside of the U.S. in its foreign operations.

Accounts Receivable

Accounts Receivable: Accounts receivable consists of receivables from commercial customers and vendors, and are presented net of an allowance for uncollectible accounts. AutoZone routinely grants credit to certain of its commercial customers. The risk of credit loss in its trade receivables is substantially mitigated by the Company’s credit evaluation process, short collection terms and sales to a large number of customers, as well as the low dollar value per transaction for most of its sales. Allowances for potential credit losses are determined based on historical experience and current evaluation of the composition of accounts receivable. Historically, credit losses have been within management’s expectations and the allowances for uncollectible accounts were $2.9 million at August 31, 2013, and $2.4 million at August 25, 2012.

Merchandise Inventories

Merchandise Inventories: Inventories are stated at the lower of cost or market using the last-in, first-out method for domestic inventories and the first-in, first out (“FIFO”) method for Mexico inventories. Included in inventory 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 our merchandise purchases, was $283.7 million at August 31, 2013, and $270.4 million at August 25, 2012.

Marketable Securities

Marketable Securities: The Company invests a portion of its assets held by the Company’s wholly owned insurance captive in marketable debt securities and classifies them as available-for-sale. The Company includes these securities within the Other current assets and Other long-term assets captions in the accompanying Consolidated Balance Sheets and records the amounts at fair market value, which is determined using quoted market prices at the end of the reporting period. A discussion of marketable securities is included in “Note E – Fair Value Measurements” and “Note F – Marketable Securities.”

Property and Equipment

Property and Equipment: Property and equipment is stated at cost. Depreciation and amortization are computed principally using the straight-line method over the following estimated useful lives: buildings, 40 to 50 years; building improvements, 5 to 15 years; equipment, 3 to 10 years; and leasehold improvements, over the shorter of the asset’s estimated useful life or the remaining lease term, which includes any reasonably assured renewal periods. Depreciation and amortization include amortization of assets under capital lease.

Impairment of Long-Lived Assets

Impairment of Long-Lived Assets: The Company evaluates the recoverability of its long-lived assets whenever events or changes in circumstances indicate that the carrying value of an asset may not be recoverable. When such an event occurs, the Company compares the sum of the undiscounted expected future cash flows of the asset (asset group) with the carrying amounts of the asset. If the undiscounted expected future cash flows are less than the carrying value of the assets, the Company measures the amount of impairment loss as the amount by which the carrying amount of the assets exceeds the fair value of the assets. There were no material impairment losses recorded in the three years ended August 31, 2013.

Goodwill

Goodwill: The cost in excess of fair value of identifiable net assets of businesses acquired is recorded as goodwill. Goodwill has not been amortized since fiscal 2001, but an analysis is performed at least annually to compare the fair value of the reporting unit to the carrying amount to determine if any impairment exists. The Company performs its annual impairment assessment in the fourth quarter of each fiscal year, unless circumstances dictate more frequent assessments. Refer to “Note N – Goodwill and Intangibles” for additional disclosures regarding the Company’s goodwill and impairment assessment.

Intangible Assets

Intangible Assets: Intangible assets consist of assets from the acquisition of AutoAnything, and include technology, noncompete agreements, customer relationships and trade name. Intangible assets are amortized over periods ranging from 5 to 10 years. Non-amortizing intangibles are reviewed at least annually for impairment by comparing the carrying amount to fair value. The Company performs its annual impairment assessment in the fourth quarter of each fiscal year, unless circumstances dictate more frequent assessments. Refer to “Note N – Goodwill and Intangibles” for additional disclosures regarding the Company’s intangible assets and impairment assessment.

Derivative Instruments and Hedging Activities

Derivative Instruments and Hedging Activities: AutoZone is exposed to market risk from, among other things, changes in interest rates, foreign exchange rates and fuel prices. From time to time, the Company uses various derivative instruments to reduce such risks. To date, based upon the Company’s current level of foreign operations, no derivative instruments have been utilized to reduce foreign exchange rate risk. All of the Company’s hedging activities are governed by guidelines that are authorized by AutoZone’s Board of Directors (the “Board”). Further, the Company does not buy or sell derivative instruments for trading purposes.

AutoZone’s financial market risk results primarily from changes in interest rates. At times, AutoZone reduces its exposure to changes in interest rates by entering into various interest rate hedge instruments such as interest rate swap contracts, treasury lock agreements and forward-starting interest rate swaps. All of the Company’s interest rate hedge instruments are designated as cash flow hedges. Refer to “Note H – Derivative Financial Instruments” for additional disclosures regarding the Company’s derivative instruments and hedging activities. Cash flows related to these instruments designated as qualifying hedges are reflected in the accompanying Consolidated Statements of Cash Flows in the same categories as the cash flows from the items being hedged. Accordingly, cash flows relating to the settlement of interest rate derivatives hedging the forecasted issuance of debt have been reflected upon settlement as a component of financing cash flows. The resulting gain or loss from such settlement is deferred to Accumulated other comprehensive loss and reclassified to interest expense over the term of the underlying debt. This reclassification of the deferred gains and losses impacts the interest expense recognized on the underlying debt that was hedged and is therefore reflected as a component of operating cash flows in periods subsequent to settlement.

Foreign Currency

Foreign Currency: The Company accounts for its Mexican and Brazilian operations using the Mexican peso and the Brazilian real as the functional currencies and converts its financial statements from these currencies to U.S. dollars. The cumulative loss on currency translation is recorded as a component of Accumulated other comprehensive loss and approximated $62.5 million at August 31, 2013, and $50.3 million at August 25, 2012.

Self-Insurance Reserves

Self-Insurance Reserves: The Company retains a significant portion of the risks associated with workers’ compensation, employee health, general, products liability, property and vehicle insurance. Through various methods, which include analyses of historical trends and utilization of actuaries, the Company estimates the costs of these risks. The costs are accrued based upon the aggregate of the liability for reported claims and an estimated liability for claims incurred but not reported. Estimates are based on calculations that consider historical lag and claim development factors. The long-term portions of these liabilities are recorded at the Company’s estimate of their net present value.

Deferred Rent

Deferred Rent: The Company recognizes rent expense on a straight-line basis over the course of the lease term, which includes any reasonably assured renewal periods, beginning on the date the Company takes physical possession of the property (see “Note O – Leases”). Differences between this calculated expense and cash payments are recorded as a liability within the Accrued expenses and other and Other long-term liabilities captions in the accompanying Consolidated Balance Sheets, based on the terms of the lease. Deferred rent approximated $96.5 million as of August 31, 2013, and $86.9 million as of August 25, 2012.

Financial Instruments

Financial Instruments: 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 I – Financing,” marketable securities is included in “Note F – Marketable Securities,” and derivatives is included in “Note H – Derivative Financial Instruments.”

Income Taxes

Income Taxes: The Company accounts for income taxes under the liability method. Deferred tax assets and liabilities are determined based on differences between financial reporting and tax bases of assets and liabilities and are measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse. Our effective tax rate is based on income by tax jurisdiction, statutory rates, and tax saving initiatives available to the Company in the various jurisdictions in which we operate.

The Company recognizes liabilities for uncertain income tax positions based on a two-step process. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates that it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step requires the Company to estimate and measure the tax benefit as the largest amount that is more than 50% likely to be realized upon ultimate settlement. It is inherently difficult and subjective to estimate such amounts, as the Company must determine the probability of various possible outcomes. The Company reevaluates these uncertain tax positions on a quarterly basis or when new information becomes available to management. These reevaluations are based on factors including, but not limited to, changes in facts or circumstances, changes in tax law, successfully settled issues under audit, expirations due to statutes, and new audit activity. Such a change in recognition or measurement could result in the recognition of a tax benefit or an increase to the tax accrual.

The Company classifies interest related to income tax liabilities, and if applicable, penalties, as a component of Income tax expense. The income tax liabilities and accrued interest and penalties that are expected to be payable within one year of the balance sheet date are presented within the Accrued expenses and other caption in the accompanying Consolidated Balance Sheets. The remaining portion of the income tax liabilities and accrued interest and penalties are presented within the Other long-term liabilities caption in the accompanying Consolidated Balance Sheets because payment of cash is not anticipated within one year of the balance sheet date. Refer to “Note D – Income Taxes” for additional disclosures regarding the Company’s income taxes.

Sales and Use Taxes

Sales and Use Taxes: Governmental authorities assess sales and use taxes on the sale of goods and services. The Company excludes taxes collected from customers in its reported sales results; such amounts are included within the Accrued expenses and other caption until remitted to the taxing authorities.

Dividends

Dividends: The Company currently does not pay a dividend on its common stock. The ability to pay dividends is subject to limitations imposed by Nevada law. Under Nevada law, any future payment of dividends would be dependent upon the Company’s financial condition, capital requirements, earnings and cash flow.

Revenue Recognition

Revenue Recognition: The Company recognizes sales at the time the sale is made and the product is delivered to the customer. Revenue from sales are presented net of allowances for estimated sales returns, which are based on historical return rates.

A portion of the Company’s transactions include the sale of auto parts that contain a core component. The core component represents the recyclable portion of the auto part. Customers are not charged for the core component of the new part if a used core is returned at the point of sale of the new part; otherwise the Company charges customers a specified amount for the core component. The Company refunds that same amount upon the customer returning a used core to the store at a later date. The Company does not recognize sales or cost of sales for the core component of these transactions when a used part is returned or expected to be returned from the customer.

Vendor Allowances and Advertising Costs

Vendor Allowances and Advertising Costs: The Company receives various payments and allowances from its vendors through a variety of programs and arrangements. Monies received from vendors include rebates, allowances and promotional funds. The amounts to be received are subject to the terms of the vendor agreements, which generally do not state an expiration date, but are subject to ongoing negotiations that may be impacted in the future based on changes in market conditions, vendor marketing strategies and changes in the profitability or sell-through of the related merchandise.

Rebates and other miscellaneous incentives are earned based on purchases or product sales and are accrued ratably over the purchase or sale of the related product. These monies are generally recorded as a reduction of merchandise inventories and are recognized as a reduction to cost of sales as the related inventories are sold.

For arrangements that provide for reimbursement of specific, incremental, identifiable costs incurred by the Company in selling the vendors’ products, the vendor funds are recorded as a reduction to Operating, selling, general and administrative expenses in the period in which the specific costs were incurred.

The Company expenses advertising costs as incurred. Advertising expense, net of vendor promotional funds, was $83.7 million in fiscal 2013, $74.7 million in fiscal 2012, and $71.5 million in fiscal 2011. Vendor promotional funds, which reduced advertising expense, amounted to $24.4 million in fiscal 2013, $19.7 million in fiscal 2012, and $23.2 million in fiscal 2011.

Cost of Sales and Operating, Selling, General and Administrative Expenses

Cost of Sales and Operating, Selling, General and Administrative Expenses: The following illustrates the primary costs classified in each major expense category:

Cost of Sales

• Total cost of merchandise sold, including:

• Freight expenses associated with moving merchandise inventories from the Company’s vendors to the distribution centers;

• Vendor allowances that are not reimbursements for specific, incremental and identifiable costs

• Costs associated with operating the Company’s supply chain, including payroll and benefit costs, warehouse occupancy costs, transportation costs and depreciation; and

• Inventory shrinkage

Operating, Selling, General and Administrative Expenses

• Payroll and benefit costs for store and store support employees;

• Occupancy costs of store and store support facilities;

• Depreciation and amortization related to retail and store support assets;

• Transportation costs associated with commercial and hub deliveries;

• Advertising;

• Self insurance costs; and

• Other administrative costs, such as credit card transaction fees, supplies, and travel and lodging

Warranty Costs

Warranty Costs: The Company or the vendors supplying its products provides the Company’s customers limited warranties on certain products that range from 30 days to lifetime. In most cases, the Company’s vendors are primarily responsible for warranty claims. Warranty costs relating to merchandise sold under warranty not covered by vendors are estimated and recorded as warranty obligations at the time of sale based on each product’s historical return rate. These obligations, which are often funded by vendor allowances, are recorded within the Accrued expenses and other caption in the Consolidated Balance Sheets. For vendor allowances that are in excess of the related estimated warranty expense for the vendor’s products, the excess is recorded in inventory and recognized as a reduction to cost of sales as the related inventory is sold.

Shipping and Handling Costs

Shipping and Handling Costs: The Company does not generally charge customers separately for shipping and handling. Substantially all the costs the Company incurs to ship products to our stores are included in cost of sales.

Pre-opening Expenses

Pre-opening Expenses: Pre-opening expenses, which consist primarily of payroll and occupancy costs, are expensed as incurred.

Earnings Per Share

Earnings per Share: Basic earnings per share is based on the weighted average outstanding common shares. Diluted earnings per share is based on the weighted average outstanding common shares adjusted for the effect of common stock equivalents, which are primarily stock options. There were 8,600 stock options excluded from the diluted earnings per share computation that would have been anti-dilutive as of August 31, 2013. There were 30,000 options excluded for the year ended August 25, 2012, and no options excluded for the year ended August 27, 2011.

Share-Based Payments

Share-Based Payments: Share-based payments include stock option grants and certain other transactions under the Company’s stock plans. The Company recognizes compensation expense for its share-based payments based on the fair value of the awards. See “Note B – Share-Based Payments” for further discussion.

Risk and Uncertainties

Risk and Uncertainties: In fiscal 2013, one class of similar products accounted for 10 percent of the Company’s total revenues, and no vendor supplied more than 10 percent of the Company’s total purchases.

Recently Adopted Accounting Pronouncements

Recently Adopted Accounting Pronouncements: In August 2011, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2011-08, Intangibles – Goodwill and Other, which amends Accounting Standards Codification (“ASC”) Topic 350, Intangibles – Goodwill and Other. The purpose of ASU 2011-08 is to simplify how an entity tests goodwill for impairment. Entities will assess qualitative factors to determine whether it is more likely than not that a reporting unit’s fair value is less than its carrying value. In instances where the fair value is determined to be less than the carrying value, entities will perform the two-step quantitative goodwill impairment test. The Company adopted this standard effective August 31, 2013, and it had no impact on the consolidated financial statements.

Recently Issued Accounting Pronouncements

Recently Issued Accounting Pronouncements: In July 2012, the FASB issued ASU 2012-02, Testing Indefinite-Lived Intangible Assets for Impairment. The purpose of ASU 2012-02 is to simplify how an entity tests for impairment of indefinite-lived intangible assets. Entities will assess qualitative factors to determine whether it is more likely than not that a long-lived intangible asset’s fair value is less than its carrying value. In instances where the fair value is determined to be less than the carrying value, entities will perform the two-step quantitative goodwill impairment test. The Company does not expect the provision of ASU 2012-02 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.

In February 2013, the FASB issued ASU 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. Under ASU 2013-02, an entity is required to provide information about the amounts reclassified out of accumulated other comprehensive income (“AOCI”) by component. In addition, an entity is required to present, either on the face of the financial statements or in the notes, significant amounts reclassified out of AOCI by the respective line items of net income, but only if the amount reclassified is required to be reclassified in its entirety in the same reporting period. For amounts that are not required to be reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures that provide additional details about those amounts. ASU 2013-02 does not change the current requirements for reporting net income or other comprehensive income in the financial statements. The Company 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.

In July 2013, the FASB issued ASU 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. Under ASU 2013-11, an entity is required to disclose a liability related to an unrecognized tax benefit as an offset against a deferred tax asset for a net operating loss carryforward, a similar tax loss or tax credit carryforward if certain criteria are met. In situations of a net operating loss carryforward, a similar tax loss or a tax credit carryforward is not available at the reporting date under the tax law of the jurisdiction or the tax law of the jurisdiction does not require, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit will be presented in the financial statements as a liability and will not be combined with deferred tax assets. The Company does not expect the provision of ASU 2013-11 to have a material impact on its consolidated financial statements. This update will be effective for the Company at the beginning of its fiscal 2015 year.

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Goodwill and Intangibles

12 Months Ended

Aug. 31, 2013

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Intangibles

Note N – 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)		—		83,440			83,440
Goodwill adjustments (2)		—		(18,256	)		(18,256	)
Net balance as of August 31, 2013	$	302,645	$	65,184		$	367,829

(1) See Note M for discussion of the acquisition completed during the second quarter of fiscal 2013

(2) Total accumulated goodwill impairment as of August 31, 2013 is $18.3 million

The Company performed its annual impairment testing in the fourth quarter of fiscal 2013 for the recorded goodwill and indefinite-lived intangible asset related to the acquisition of AutoAnything. Based on an analysis of AutoAnything’s revised planned financial results compared to the initial projections, the Company determined it was more likely than not that the goodwill attributed to AutoAnything was impaired. Accordingly, the Company performed a goodwill impairment test by comparing the fair value of the reporting unit with its carrying amount, including goodwill. The Company uses the discounted cash flow methodology to determine fair value as it is considered to be the most reliable indicator of the fair values of the business. Because the fair value of the reporting unit was lower than its carrying value, the Company recorded a goodwill impairment charge of $18.3 million during the fourth quarter of fiscal 2013.

The carrying amounts of intangible assets, which all relate to the AutoAnything acquisition, are included in Other long-term assets as follows:

(in thousands)	Estimated Useful Life		Gross Carrying Amount		Accumulated Amortization			Impairment			Net Carrying Amount
Technology		5 years	$	9,700	$	(1,365	)	$	—		$	8,335
Noncompete agreement		5 years		1,300		(183	)		—			1,117
Customer relationships		10 years		19,000		(1,336	)		—			17,664
Trade name		Indefinite		28,700		—			(4,100	)		24,600
			$	58,700	$	(2,884	)	$	(4,100	)	$	51,716

As part of its annual impairment test, the Company evaluated the AutoAnything trade name for impairment. Based on the Company’s evaluation of the future discounted cash flows of AutoAnything’s trade name as compared to its carrying value, it was determined that AutoAnything’s trade name was impaired. The Company recorded an impairment charge of $4.1 million during the fourth quarter of fiscal 2013 related to the trade name.

Amortization expense of intangible assets for the year ended August 31, 2013, was $2.9 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 August 31, 2013, is estimated as follows:

(in thousands)	Total
2014	$	4,100
2015		4,100
2016		4,100
2017		4,100
2018		2,553
Thereafter		8,163
	$	27,116

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Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Aug. 31, 2013 Store	Aug. 25, 2012	Aug. 27, 2011	Aug. 28, 2010
Significant Accounting Policies [Line Items]
Number of domestic stores in United States and Puerto Rico	4,836
Number of stores	5,201
Number of stores with commercial sales program	3,421
Cash and cash equivalents	$ 142,191,000	$ 103,093,000	$ 97,606,000	$ 98,280,000
Allowances for uncollectible accounts	2,900,000	2,400,000
Unrecorded adjustment for LIFO value in excess of replacement value	283,700,000	270,400,000
Impairment loss of long lived assets	0
Cumulative loss on currency translation recorded in accumulated other comprehensive loss	62,500,000	50,300,000
Deferred rent	96,500,000	86,900,000
Measure of income tax benefit for uncertain income tax positions	More than 50%
Advertising expense, net of vendor promotional funds	83,700,000	74,700,000	71,500,000
Vendor promotional funds, which reduced advertising expense	24,400,000	19,700,000	23,200,000
Limited warranty period, minimum period (Days)	30 days
Products accounted for total revenues	One class of similar products accounted for 10 percent of the Company's total revenues
Products accounted for total purchases	No vendor supplied more than 10 percent of the Company's total purchases
Minimum [Member]
Significant Accounting Policies [Line Items]
Amortization of intangible assets	5 years
Maximum [Member]
Significant Accounting Policies [Line Items]
Amortization of intangible assets	10 years
Stock Options [Member]
Significant Accounting Policies [Line Items]
Anti-dilutive shares excluded from the computation of earnings per share	8,600	30,000	0
Product Concentration Risk [Member]
Significant Accounting Policies [Line Items]
Number of class of similar products accounted for 10% of company's total revenue	1
Supplier Concentration Risk [Member]
Significant Accounting Policies [Line Items]
Number of class of similar products accounted for 10% of company's total revenue	0
Cash Equivalents [Member]
Significant Accounting Policies [Line Items]
Maturity period of investments	90 days or less
Settlement term of credit and debit card transaction	Less than 5 days
Credit and debit card receivables included within cash and cash equivalents	39,800,000	34,000,000
Buildings [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives	40 years
Buildings [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives	50 years
Building Improvements [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives	5 years
Building Improvements [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives	15 years
Equipment [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives	3 years
Equipment [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives	10 years
Brazil [Member]
Significant Accounting Policies [Line Items]
Number of stores	3
Mexico [Member]
Significant Accounting Policies [Line Items]
Number of stores	362
Foreign Countries [Member]
Significant Accounting Policies [Line Items]
Cash and cash equivalents	$ 38,200,000	$ 7,800,000

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Pension and Savings Plans - Actuarial Assumptions Used in Determining Projected Benefit Obligation (Detail)	12 Months Ended
	Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011
Compensation And Retirement Disclosure [Abstract]
Weighted average discount rate	5.19%	3.90%	5.13%
Expected long-term rate of return on plan assets	7.50%	7.50%	8.00%

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Income Taxes - Significant Components of Company's Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2013	Aug. 25, 2012
Deferred tax assets:
Net operating loss and credit carryforwards	$ 41,785	$ 36,605
Insurance reserves	16,237	18,185
Accrued benefits	67,350	63,320
Pension	18,004	43,904
Other	45,597	41,658
Total deferred tax assets	188,973	203,672
Less: Valuation allowances	(11,593)	(9,532)
Net deferred tax assets	177,380	194,140
Deferred tax liabilities:
Property and equipment	(84,512)	(67,480)
Inventory	(262,653)	(244,414)
Other	(27,341)	(31,437)
Total deferred tax liabilities	(374,506)	(343,331)
Net deferred tax liability	$ (197,126)	$ (149,191)

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Financing - Schedule of Debt (Detail) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2013	Aug. 25, 2012
Debt Instrument [Line Items]
Total debt	$ 4,187,000	$ 3,768,183
Less: Short-term borrowings	173,733	49,881
Long-term debt	4,013,267	3,718,302
5.875% Senior Notes due October 2012, Effective Interest Rate of 6.33% [Member]
Debt Instrument [Line Items]
Total debt		300,000
4.375% Senior Notes due June 2013, Effective Interest Rate of 5.65% [Member]
Debt Instrument [Line Items]
Total debt		200,000
6.500% Senior Notes due January 2014, Effective Interest Rate of 6.63% [Member]
Debt Instrument [Line Items]
Total debt	500,000	500,000
5.750% Senior Notes due January 2015, Effective Interest Rate of 5.89% [Member]
Debt Instrument [Line Items]
Total debt	500,000	500,000
5.500% Senior Notes due November 2015, Effective Interest Rate of 4.86% [Member]
Debt Instrument [Line Items]
Total debt	300,000	300,000
6.950% Senior Notes due June 2016, Effective Interest Rate of 7.09% [Member]
Debt Instrument [Line Items]
Total debt	200,000	200,000
7.125% Senior Notes due August 2018, Effective Interest Rate of 7.28% [Member]
Debt Instrument [Line Items]
Total debt	250,000	250,000
4.000% Senior Notes due November 2020, Effective Interest Rate of 4.43% [Member]
Debt Instrument [Line Items]
Total debt	500,000	500,000
3.700% Senior Notes due April 2022, Effective Interest Rate of 3.85% [Member]
Debt Instrument [Line Items]
Total debt	500,000	500,000
2.875% Senior Notes due January 2023, Effective Interest Rate of 3.21% [Member]
Debt Instrument [Line Items]
Total debt	300,000
3.125% Senior Notes due July 2023, Effective Interest Rate of 3.26% [Member]
Debt Instrument [Line Items]
Total debt	500,000
Commercial Paper, Weighted Average Interest Rate of 0.29% and 0.42% at August 31, 2013 and August 25, 2012 [Member]
Debt Instrument [Line Items]
Total debt	637,000	513,402
Unsecured, Peso Denominated Borrowings, Weighted Average Interest Rate of 4.57% at August 25, 2012 [Member]
Debt Instrument [Line Items]
Total debt		$ 4,781

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Pension and Savings Plans (Tables)

12 Months Ended

Aug. 31, 2013

Compensation And Retirement Disclosure [Abstract]

Weighted Average Asset Allocation for Pension Plan Assets

The fair values of investments by level and asset category and the weighted-average asset allocations of the Company’s pension plans at the measurement date are presented in the following table:

August 31, 2013
	Fair Value		Asset Allocation						Fair Value Hierarchy
(in thousands)			Actual			Target			Level 1		Level 2		Level 3
U.S. equities	$	57,931		27.9	%		30.0	%	$	—	$	57,931	$	—
International equities		38,145		18.3			20.0			—		38,145		—
Emerging equities		19,030		9.1			10.0			—		19,030		—
High yield equities		19,858		9.5			10.0			—		19,858		—
Alternative investments		1,226		0.6			—			—		—		1,226
Fixed income securities		59,500		28.6			30.0			—		59,500		—
Cash and cash equivalents		12,430		6.0			—			—		12,430		—
	$	208,120		100.0	%		100.0	%	$	—	$	206,894	$	1,226

August 25, 2012
	Fair Value		Asset Allocation						Fair Value Hierarchy
(in thousands)			Actual			Target			Level 1		Level 2		Level 3
U.S. equities	$	51,101		28.2	%		30.0	%	$	—	$	51,101	$	—
International equities		31,767		17.5			20.0			—		31,767		—
Emerging equities		16,471		9.1			10.0			—		16,471		—
High yield equities		17,378		9.6			10.0			—		17,378		—
Alternative investments		2,404		1.3			—			—		—		2,404
Fixed income securities		47,667		26.3			30.0			—		47,667		—
Cash and cash equivalents		14,621		8.0			—			—		14,621		—
	$	181,409		100.0	%		100.0	%	$	—	$	179,005	$	2,404

Change in Fair Value of Level 3 Assets

The change in fair value of Level 3 assets that use significant unobservable inputs is presented in the following table:

(in thousands)	Level 3 Assets
Beginning balance – August 25, 2012	$	2,404
Actual return on plan assets:
Assets held at August 31, 2013		60
Assets sold during the year		72
Sales and settlements		(1,310	)
Ending balance – August 31, 2013	$	1,226

Plan's Funded Status and Amounts Recognized in Company's Consolidated Balance Sheets

The following table sets forth the plans’ funded status and amounts recognized in the Company’s Consolidated Balance Sheets:

(in thousands)	August 31, 2013			August 25, 2012
Change in Projected Benefit Obligation:
Projected benefit obligation at beginning of year	$	305,206		$	241,645
Interest cost		11,746			12,214
Actuarial (gains) losses		(53,756	)		56,749
Benefits paid		(6,416	)		(5,402	)
Benefit obligations at end of year	$	256,780		$	305,206
Change in Plan Assets:
Fair value of plan assets at beginning of year	$	181,409		$	156,883
Actual return on plan assets		16,218			14,505
Employer contributions		16,909			15,423
Benefits paid		(6,416	)		(5,402	)
Fair value of plan assets at end of year	$	208,120		$	181,409
Amount Recognized in the Statement of Financial Position:
Current liabilities	$	(124	)	$	(30	)
Long-term liabilities		(48,536	)		(123,767	)
Net amount recognized	$	(48,660	)	$	(123,797	)
Amount Recognized in Accumulated Other Comprehensive Loss and not yet reflected in Net Periodic Benefit Cost:
Net actuarial loss	$	(83,601	)	$	(154,678	)
Accumulated other comprehensive loss	$	(83,601	)	$	(154,678	)
Amount Recognized in Accumulated Other Comprehensive Loss and not yet reflected in Net Periodic Benefit Cost and expected to be amortized in next year’s Net Periodic Benefit Cost:
Net actuarial loss	$	(6,879	)	$	(14,721	)
Amount recognized	$	(6,879	)	$	(14,721	)

Net Periodic Benefit Expense

Net periodic benefit expense consisted of the following:

	Year Ended
(in thousands)	August 31, 2013			August 25, 2012			August 27, 2011
Interest cost	$	11,746		$	12,214		$	11,135
Expected return on plan assets		(13,617	)		(11,718	)		(9,326	)
Amortization of prior service cost		—			—			—
Recognized net actuarial losses		14,721			9,795			9,405
Net periodic benefit expense	$	12,850		$	10,291		$	11,214

Actuarial Assumptions Used in Determining Projected Benefit Obligation

The actuarial assumptions used in determining the projected benefit obligation include the following:

	Year Ended
	August 31, 2013			August 25, 2012			August 27, 2011
Weighted average discount rate		5.19	%		3.90	%		5.13	%
Expected long-term rate of return on plan assets		7.50	%		7.50	%		8.00	%

Benefit Payments are Expected to be Paid as Follows

Based on current assumptions about future events, benefit payments are expected to be paid as follows for each of the following fiscal years. Actual benefit payments may vary significantly from the following estimates:

(in thousands)	Benefit Payments
2014	$	9,125
2015		9,205
2016		9,912
2017		10,604
2018		11,193
2019 – 2023		65,396

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Accumulated Other Comprehensive Loss (Tables)

12 Months Ended

Aug. 31, 2013

Equity [Abstract]

Changes in Accumulated Other Comprehensive Loss, Net of Tax

Changes in Accumulated other comprehensive loss, net of tax, consisted of the following:

(in thousands)	Pension Liability			Foreign Currency(1)			Unrealized Gain on Securities			Derivatives			Total
Balance at August 27, 2011	$	(76,705	)	$	(36,401	)	$	479		$	(7,064	)	$	(119,691	)
Fiscal 2012 activity		(17,262	)		(13,866	)		(128	)		(1,066	)		(32,322	)
Balance at August 25, 2012		(93,967	)		(50,267	)		351			(8,130	)		(152,013	)
Fiscal 2013 activity		43,106			(12,216	)		(376	)		711			31,225
Balance at August 31, 2013	$	(50,861	)	$	(62,483	)	$	(25	)	$	(7,419	)	$	(120,788	)

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

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Financing (Tables)

12 Months Ended

Aug. 31, 2013

Debt Disclosure [Abstract]

Schedule of Debt

The Company’s debt consisted of the following:

(in thousands)	August 31, 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
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		—
3.125% Senior Notes due July 2023, effective interest rate of 3.26%		500,000		—
Commercial paper, weighted average interest rate of 0.29% and 0.42% at August 31, 2013 and August 25, 2012, respectively		637,000		513,402
Unsecured, peso denominated borrowings, weighted average interest rate of 4.57% at August 25, 2012		—		4,781
Total debt		4,187,000		3,768,183
Less: Short-term borrowings		173,733		49,881
Long-term debt	$	4,013,267	$	3,718,302

Scheduled Maturities of Long-Term Debt

Scheduled maturities of long-term debt are as follows:

(in thousands)	Scheduled Maturities
2014	$	963,267
2015		500,000
2016		500,000
2017		—
2018		250,000
Thereafter		1,800,000
	$	4,013,267

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Income Taxes

12 Months Ended

Aug. 31, 2013

Income Tax Disclosure [Abstract]

Income Taxes

Note D – Income Taxes

The components of income from continuing operations before income taxes are as follows:

	Year Ended
(in thousands)	August 31, 2013		August 25, 2012		August 27, 2011
Domestic	$	1,486,386	$	1,373,142	$	1,255,127
International		101,297		79,844		69,119
	$	1,587,683	$	1,452,986	$	1,324,246

The provision for income tax expense consisted of the following:

	Year Ended
(in thousands)	August 31, 2013			August 25, 2012			August 27, 2011
Current:
Federal	$	466,803		$	424,895		$	364,117
State		46,494			47,386			39,473
International		38,202			24,775			27,015
		551,499			497,056			430,605
Deferred:
Federal		16,816			33,679			57,625
State		3,139			(2,822	)		(5,031	)
International		(251	)		(5,300	)		(7,927	)
		19,704			25,557			44,667
Income tax expense	$	571,203		$	522,613		$	475,272

A reconciliation of the provision for income taxes to the amount computed by applying the federal statutory tax rate of 35% to income before income taxes is as follows:

	Year Ended
(in thousands)	August 31, 2013			August 25, 2012			August 27, 2011
Federal tax at statutory U.S. income tax rate		35.0	%		35.0	%		35.0	%
State income taxes, net		2.0	%		2.0	%		1.7	%
Other		(1.0	%)		(1.0	%)		(0.8	%)
Effective tax rate		36.0	%		36.0	%		35.9	%

Significant components of the Company’s deferred tax assets and liabilities were as follows:

(in thousands)	August 31, 2013			August 25, 2012
Deferred tax assets:
Net operating loss and credit carryforwards	$	41,785		$	36,605
Insurance reserves		16,237			18,185
Accrued benefits		67,350			63,320
Pension		18,004			43,904
Other		45,597			41,658
Total deferred tax assets		188,973			203,672
Less: Valuation allowances		(11,593	)		(9,532	)
		177,380			194,140
Deferred tax liabilities:
Property and equipment		(84,512	)		(67,480	)
Inventory		(262,653	)		(244,414	)
Other		(27,341	)		(31,437	)
Total deferred tax liabilities		(374,506	)		(343,331	)
Net deferred tax liability	$	(197,126	)	$	(149,191	)

Deferred taxes are not provided for temporary differences of approximately $260.0 million at August 31, 2013, and $195.8 million at August 25, 2012, representing earnings of non-U.S. subsidiaries that are intended to be permanently reinvested. Computation of the potential deferred tax liability associated with these undistributed earnings and other basis differences is not practicable.

At August 31, 2013 and August 25, 2012, the Company had deferred tax assets of $8.7 million and $12.3 million, respectively, from net operating loss (“NOL”) carryforwards available to reduce future taxable income totaling approximately $75.5 million and $76.6 million, respectively. Certain NOLs have no expiration date and others will expire, if not utilized, in various years from fiscal 2014 through 2032. At August 31, 2013 and August 25, 2012, the Company had deferred tax assets for income tax credit carryforwards of $33.1 million and $24.3 million, respectively. Certain income tax credit carryforwards have no expiration and others will expire, if not utilized, in various years from fiscal 2014 through 2027.

At August 31, 2013 and August 25, 2012, the Company had a valuation allowance of $11.6 million and $9.5 million, respectively, on deferred tax assets associated with NOL and tax credit carryforwards for which management has determined it is more likely than not that the deferred tax asset will not be realized. The $2.1 million net increase in the valuation allowance during fiscal 2013 related to increases from certain NOLs and tax credits arising in fiscal 2013 and decreases due to NOL expirations. Management believes it is more likely than not that the remaining deferred tax assets will be fully realized.

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:

(in thousands)	August 31, 2013			August 25, 2012
Beginning balance	$	27,715		$	29,906
Additions based on tax positions related to the current year		7,015			6,869
Additions for tax positions of prior years		2,758			44
Reductions for tax positions of prior years		(470	)		(1,687	)
Reductions due to settlements		(3,019	)		(4,586	)
Reductions due to statute of limitations		(3,356	)		(2,831	)
Ending balance	$	30,643		$	27,715

Included in the August 31, 2013 balance is $20.1 million of unrecognized tax benefits that, if recognized, would reduce the Company’s effective tax rate.

The Company accrues interest on unrecognized tax benefits as a component of income tax expense. Penalties, if incurred, would be recognized as a component of income tax expense. The Company had $4.7 million and $4.1 million accrued for the payment of interest and penalties associated with unrecognized tax benefits at August 31, 2013 and August 25, 2012, respectively.

The Company files U.S. federal, U.S. state and local, and international income tax returns. The U.S. Internal Revenue Service has completed exams on U.S. federal income tax returns for years 2009 and prior. With few exceptions, the Company is no longer subject to state and local or non-U.S. examinations by tax authorities for years before 2009. The Company is typically engaged in various tax examinations at any given time, both by U.S. federal, state and local, and international taxing jurisdictions. As of August 31, 2013, the Company estimates that the amount of unrecognized tax benefits could be reduced by approximately $1.5 million over the next twelve months as a result of tax audit settlements. While the Company believes that it is adequately accrued for possible audit adjustments, the final resolution of these examinations cannot be determined at this time and could result in final settlements that differ from current estimates.

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Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss, Net of Tax (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ (152,013)	$ (119,691)
Fiscal activity	31,225	(32,322)	(13,223)
Balance	(120,788)	(152,013)	(119,691)
Pension Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(93,967)	(76,705)
Fiscal activity	43,106	(17,262)
Balance	(50,861)	(93,967)
Foreign Currency [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(50,267)	(36,401)
Fiscal activity	(12,216)	(13,866)
Balance	(62,483)	(50,267)
Unrealized Gain on Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	351	479
Fiscal activity	(376)	(128)
Balance	(25)	351
Derivatives [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(8,130)	(7,064)
Fiscal activity	711	(1,066)
Balance	$ (7,419)	$ (8,130)

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Segment Reporting - Additional Information (Detail)	12 Months Ended
	Aug. 31, 2013 Segment Store
Segment Reporting [Abstract]
Number of operating segments	3
Number of reportable segments	1
Number of automotive parts and accessories stores in the United States, Puerto Rico, Mexico, and Brazil	5,201

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Share-Based Payments (Tables)

12 Months Ended

Aug. 31, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

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

 The following table presents the weighted average for key assumptions used in determining the fair value of options granted and the related share-based compensation expense:

	Year Ended
	August 31, 2013			August 25, 2012			August 27, 2011
Expected price volatility		29	%		28	%		31	%
Risk-free interest rates		0.5	%		0.7	%		1.0	%
Weighted average expected lives (in years)		5.2			5.4			4.3
Forfeiture rate		10	%		10	%		10	%
Dividend yield		0	%		0	%		0	%

Stock Option Activity

The following table summarizes information about stock option activity for the year ended August 31, 2013:

	Number of Shares			Weighted Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in thousands)
Outstanding – August 25, 2012		2,262,679		$	173.01
Granted		364,160			371.76
Exercised		(773,942	)		128.68
Cancelled		(56,909	)		282.28
Outstanding – August 31, 2013		1,795,988			228.95		6.56	$	343,015
Exercisable		899,079			152.35		5.05		240,584
Expected to vest		896,909			305.74		8.07		92,187
Available for future grants		2,085,615

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Segment Reporting (Tables)

12 Months Ended

Aug. 31, 2013

Segment Reporting [Abstract]

Segment Results

The Company evaluates its reportable segment primarily on the basis of net sales and segment profit, which is defined as gross profit. The following table shows segment results for the following fiscal years:

	Year Ended
(in thousands)	August 31, 2013			August 25, 2012			August 27, 2011
Net Sales:
Auto Parts Stores	$	8,858,723		$	8,422,559		$	7,906,692
Other		288,807			181,304			166,281
Total	$	9,147,530		$	8,603,863		$	8,072,973
Segment Profit:
Auto Parts Stores	$	4,568,190		$	4,292,474		$	3,989,852
Other		172,745			139,562			129,611
Gross profit		4,740,935			4,432,036			4,119,463
Operating, selling, general and administrative expenses		(2,967,837	)		(2,803,145	)		(2,624,660	)
Interest expense, net		(185,415	)		(175,905	)		(170,557	)
Income before income taxes	$	1,587,683		$	1,452,986		$	1,324,246
Segment Assets:
Auto Parts Stores	$	6,719,885		$	6,214,688		$	5,827,285
Other		172,204			50,951			42,317
Total	$	6,892,089		$	6,265,639		$	5,869,602
Capital Expenditures:
Auto Parts Stores	$	402,028		$	364,361		$	316,074
Other		12,423			13,693			5,530
Total	$	414,451		$	378,054		$	321,604
Auto Parts Stores Sales by Product Grouping:
Failure	$	4,214,642		$	3,793,963		$	3,530,497
Maintenance items		3,224,229			3,196,807			3,051,672
Discretionary		1,419,852			1,431,789			1,324,523
Auto Parts Stores net sales	$	8,858,723		$	8,422,559		$	7,906,692

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Accumulated Other Comprehensive Loss

12 Months Ended

Aug. 31, 2013

Equity [Abstract]

Accumulated Other Comprehensive Loss

Note G – 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, net of tax, consisted of the following:

(in thousands)	Pension Liability			Foreign Currency (1)			Unrealized Gain on Securities			Derivatives			Total
Balance at August 27, 2011	$	(76,705	)	$	(36,401	)	$	479		$	(7,064	)	$	(119,691	)
Fiscal 2012 activity		(17,262	)		(13,866	)		(128	)		(1,066	)		(32,322	)
Balance at August 25, 2012		(93,967	)		(50,267	)		351			(8,130	)		(152,013	)
Fiscal 2013 activity		43,106			(12,216	)		(376	)		711			31,225
Balance at August 31, 2013	$	(50,861	)	$	(62,483	)	$	(25	)	$	(7,419	)	$	(120,788	)

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

The fiscal 2013 pension adjustment of $43.1 million reflects actuarial gains not yet reflected in periodic pension cost primarily driven by a higher discount rate at August 31, 2013.

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Quarterly Summary - Quarterly Summary (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended						4 Months Ended		12 Months Ended
	May 04, 2013	Feb. 09, 2013	Nov. 17, 2012	May 05, 2012	Feb. 11, 2012	Nov. 19, 2011	Aug. 31, 2013	Aug. 25, 2012	Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 2,205,878	$ 1,855,198	$ 1,991,040	$ 2,111,866	$ 1,804,069	$ 1,924,341	$ 3,095,414	$ 2,763,585	$ 9,147,530	$ 8,603,863	$ 8,072,973
Gross profit	1,142,713	961,981	1,031,866	1,089,799	926,215	983,627	1,604,376	1,432,394	4,740,935	4,432,036	4,119,463
Operating profit	456,030	317,571	363,276	427,250	300,651	340,934	636,220	560,056	1,773,098	1,628,891	1,494,803
Income before income taxes	413,939	276,248	322,172	387,507	261,728	301,840	575,324	501,911	1,587,683	1,452,986	1,324,246
Net income	$ 265,583	$ 176,247	$ 203,452	$ 248,586	$ 166,930	$ 191,125	$ 371,199	$ 323,733	$ 1,016,480	$ 930,373	$ 848,974
Basic earnings per share	$ 7.39	$ 4.86	$ 5.52	$ 6.43	$ 4.25	$ 4.79	$ 10.59	$ 8.65	$ 28.28	$ 24.04	$ 19.91
Diluted earnings per share	$ 7.27	$ 4.78	$ 5.41	$ 6.28	$ 4.15	$ 4.68	$ 10.42	$ 8.46	$ 27.79	$ 23.48	$ 19.47

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Pension and Savings Plans - Change in Fair Value of Level 3 Assets (Detail) (USD $) In Thousands, unless otherwise specified				12 Months Ended
	Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011	Aug. 31, 2013 Level 3 [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Beginning balance	$ 208,120	$ 181,409	$ 156,883	$ 2,404
Actual return on plan assets:
Assets held				60
Assets sold during the year				72
Sales and settlements				(1,310)
Ending balance	$ 208,120	$ 181,409	$ 156,883	$ 1,226

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Accrued Expenses and Other

12 Months Ended

Aug. 31, 2013

Text Block [Abstract]

Accrued Expenses and Other

Note C – Accrued Expenses and Other

Accrued expenses and other consisted of the following:

(in thousands)	August 31, 2013		August 25, 2012
Medical and casualty insurance claims (current portion)	$	66,133	$	63,484
Accrued compensation, related payroll taxes and benefits		137,165		151,669
Property, sales, and other taxes		90,944		97,542
Accrued interest		40,442		39,220
Accrued gift cards		32,160		29,060
Accrued sales and warranty returns		14,171		17,276
Capital lease obligations		32,246		29,842
Other		54,570		49,992
	$	467,831	$	478,085

The Company retains a significant portion of the insurance risks associated with workers’ compensation, employee health, general, products liability, property and vehicle insurance. A portion of these self-insured losses is managed through a wholly owned insurance captive. The Company maintains certain levels for stop-loss coverage for each self-insured plan in order to limit its liability for large claims. The limits are per claim and are $1.5 million for workers’ compensation and property, $0.5 million for employee health, and $1.0 million for general, products liability, and vehicle.

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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011
Cash flows from operating activities:
Net income	$ 1,016,480	$ 930,373	$ 848,974
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of property and equipment	227,251	211,831	196,209
Amortization of debt origination fees	8,239	8,066	8,962
Income tax benefit from exercise of stock options	(66,752)	(63,041)	(34,945)
Deferred income taxes	19,704	25,557	44,667
Share-based compensation expense	37,307	33,363	26,625
Changes in operating assets and liabilities:
Accounts receivable	(8,196)	(21,276)	(14,605)
Merchandise inventories	(232,846)	(167,914)	(155,421)
Accounts payable and accrued expenses	356,935	197,406	342,826
Income taxes payable	61,003	56,754	34,319
Other, net	(4,114)	12,862	(6,073)
Net cash provided by operating activities	1,415,011	1,223,981	1,291,538
Cash flows from investing activities:
Capital expenditures	(414,451)	(378,054)	(321,604)
Acquisition of business	(116,084)
Purchase of marketable securities	(44,469)	(45,665)	(43,772)
Proceeds from sale of marketable securities	37,944	42,385	43,081
Proceeds from disposal of capital assets	9,765	6,573	3,301
Net cash used in investing activities	(527,295)	(374,761)	(318,994)
Cash flows from financing activities:
Net proceeds (payments) of commercial paper	123,600	(54,200)	134,600
Net (payments) proceeds from short-term borrowings	(4,948)	(27,071)	6,901
Proceeds from issuance of debt	800,000	500,000	500,000
Repayment of debt	(500,000)		(199,300)
Net proceeds from sale of common stock	97,154	75,343	55,846
Purchase of treasury stock	(1,387,315)	(1,362,869)	(1,466,802)
Income tax benefit from exercise of stock options	66,752	63,041	34,945
Payments of capital lease obligations	(27,545)	(26,750)	(22,781)
Other	(14,720)	(10,927)	(17,180)
Net cash used in financing activities	(847,022)	(843,433)	(973,771)
Effect of exchange rate changes on cash	(1,596)	(300)	553
Net increase (decrease) in cash and cash equivalents	39,098	5,487	(674)
Cash and cash equivalents at beginning of year	103,093	97,606	98,280
Cash and cash equivalents at end of year	142,191	103,093	97,606
Supplemental cash flow information:
Interest paid, net of interest cost capitalized	174,037	161,797	155,531
Income taxes paid	498,587	443,666	405,654
Assets acquired through capital lease	$ 71,117	$ 74,726	$ 32,301

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Segment Reporting - Segment Results (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended						4 Months Ended		12 Months Ended
	May 04, 2013	Feb. 09, 2013	Nov. 17, 2012	May 05, 2012	Feb. 11, 2012	Nov. 19, 2011	Aug. 31, 2013	Aug. 25, 2012	Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011
Operating Statistics [Line Items]
Net sales	$ 2,205,878	$ 1,855,198	$ 1,991,040	$ 2,111,866	$ 1,804,069	$ 1,924,341	$ 3,095,414	$ 2,763,585	$ 9,147,530	$ 8,603,863	$ 8,072,973
Gross profit	1,142,713	961,981	1,031,866	1,089,799	926,215	983,627	1,604,376	1,432,394	4,740,935	4,432,036	4,119,463
Assets							6,892,089	6,265,639	6,892,089	6,265,639
Interest expense, net									(185,415)	(175,905)	(170,557)
Capital Expenditures									414,451	378,054	321,604
Income before income taxes	413,939	276,248	322,172	387,507	261,728	301,840	575,324	501,911	1,587,683	1,452,986	1,324,246
Operating Segments [Member]
Operating Statistics [Line Items]
Net sales									9,147,530	8,603,863	8,072,973
Gross profit									4,740,935	4,432,036	4,119,463
Operating, selling, general and administrative expenses									(2,967,837)	(2,803,145)	(2,624,660)
Assets							6,892,089	6,265,639	6,892,089	6,265,639	5,869,602
Interest expense, net									(185,415)	(175,905)	(170,557)
Capital Expenditures									414,451	378,054	321,604
Income before income taxes									1,587,683	1,452,986	1,324,246
Operating Segments [Member] | Auto Parts Stores [Member]
Operating Statistics [Line Items]
Net sales									8,858,723	8,422,559	7,906,692
Gross profit									4,568,190	4,292,474	3,989,852
Assets							6,719,885	6,214,688	6,719,885	6,214,688	5,827,285
Capital Expenditures									402,028	364,361	316,074
Operating Segments [Member] | Auto Parts Stores [Member] | Failure [Member]
Operating Statistics [Line Items]
Net sales									4,214,642	3,793,963	3,530,497
Operating Segments [Member] | Auto Parts Stores [Member] | Maintenance Items [Member]
Operating Statistics [Line Items]
Net sales									3,224,229	3,196,807	3,051,672
Operating Segments [Member] | Auto Parts Stores [Member] | Discretionary [Member]
Operating Statistics [Line Items]
Net sales									1,419,852	1,431,789	1,324,523
Operating Segments [Member] | Other [Member]
Operating Statistics [Line Items]
Net sales									288,807	181,304	166,281
Gross profit									172,745	139,562	129,611
Assets							172,204	50,951	172,204	50,951	42,317
Capital Expenditures									$ 12,423	$ 13,693	$ 5,530

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Income Taxes - Reconciliation of Provision for Income Taxes (Detail)	12 Months Ended
	Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011
Income Tax Disclosure [Abstract]
Federal tax at statutory U.S. income tax rate	35.00%	35.00%	35.00%
State income taxes, net	2.00%	2.00%	1.70%
Other	(1.00%)	(1.00%)	(0.80%)
Effective tax rate	36.00%	36.00%	35.90%

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Share-Based Payments - Stock Option Activity (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Aug. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Outstanding, Beginning balance, Number of Shares	2,262,679
Granted, Number of Shares	364,160
Exercised, Number of Shares	(773,942)
Cancelled, Number of Shares	(56,909)
Outstanding, Ending balance, Number of Shares	1,795,988
Exercisable, Number of Shares	899,079
Expected to vest, Number of Shares	896,909
Available for future grants, Number of Shares	2,085,615
Outstanding, Beginning balance, Weighted Average Exercise Price	$ 173.01
Granted, Weighted Average Exercise Price	$ 371.76
Exercised, Weighted Average Exercise Price	$ 128.68
Cancelled, Weighted Average Exercise Price	$ 282.28
Outstanding, Ending balance, Weighted Average Exercise Price	$ 228.95
Exercisable, Weighted Average Exercise Price	$ 152.35
Expected to vest, Weighted Average Exercise Price	$ 305.74
Outstanding , Weighted-Average Remaining Contractual Term	6 years 6 months 22 days
Exercisable, Weighted-Average Remaining Contractual Term	5 years 18 days
Expected to vest, Weighted-Average Remaining Contractual Term	8 years 26 days
Outstanding, Aggregate Intrinsic Value	$ 343,015
Exercisable, Aggregate Intrinsic Value	240,584
Expected to vest, Aggregate Intrinsic Value	$ 92,187

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Goodwill and Intangibles - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Aug. 31, 2013	Aug. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment charge	$ 18,300,000
Amortization expense of intangible assets		2,900,000
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment charge		4,100,000
AutoAnything [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment charge	18,300,000
AutoAnything [Member] | Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment charge	$ 4,100,000

XML

Fair Value Measurements (Tables)

12 Months Ended

Aug. 31, 2013

Fair Value Disclosures [Abstract]

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

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

	August 31, 2013
(in thousands)	Level 1		Level 2		Level 3			Fair Value
Other current assets	$	16,386	$	24	$	—		$	16,410
Other long-term assets		49,011		16,740		—			65,751
	$	65,397	$	16,764	$	—		$	82,161
Contingent consideration	$	—	$	—	$	(242	)	$	(242	)

	August 25, 2012
(in thousands)	Level 1		Level 2			Level 3		Fair Value
Other current assets	$	22,515	$	—		$	—	$	22,515
Other long-term assets		40,424		13,275			—		53,699
	$	62,939	$	13,275		$	—	$	76,214
Accrued expenses and other	$	—	$	(4,915	)	$	—	$	(4,915	)

Change in Contingent Consideration Liability at Fair Value on Recurring Basis

The change in the fair value of the contingent consideration liability is summarized as follows:

(in thousands)	Fiscal Year Ended August 31, 2013
Fair value – beginning of period	$	—
Fair value of contingent consideration issued during the period		(22,678	)
Change in fair value		22,436
Fair value – end of period	$	(242	)

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Goodwill and Intangibles - Schedule of Changes in Carrying Amount of Goodwill (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Aug. 31, 2013
Goodwill And Intangible Assets Disclosure [Abstract]
Accumulated goodwill impairment	$ 18.3

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Litigation - Additional Information (Detail)	12 Months Ended
	Aug. 31, 2013
Commitments And Contingencies Disclosure [Abstract]
Site contingency, recovery from third party of environmental remediation cost	In 2004, the Company acquired a store site in Mount Ephraim, New Jersey that had previously been the site of a gasoline service station and contained evidence of groundwater contamination. Upon acquisition, the Company voluntarily reported the groundwater contamination issue to the New Jersey Department of Environmental Protection and entered into a Voluntary Remediation Agreement providing for the remediation of the contamination associated with the property. The Company has conducted and paid for (at an immaterial cost to the Company) remediation of contamination on the property. The Company is also investigating, and will be addressing, potential vapor intrusion impacts in downgradient residences and businesses. The New Jersey Department of Environmental Protection has asserted, in a Directive and Notice to Insurers dated February 19, 2013 (“Directive”), that the Company is liable for the downgradient impacts under a joint and severable liability theory, and the Company has contested any such assertions due to the existence of other entities/sources of contamination, some of which are 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.
Reimbursable remediation costs	75.00%

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Financing - Schedule of Debt (Parenthetical) (Detail)	Aug. 31, 2013 5.875% Senior Notes due October 2012, Effective Interest Rate of 6.33% [Member]	Nov. 13, 2012 5.875% Senior Notes due October 2012, Effective Interest Rate of 6.33% [Member]	Aug. 25, 2012 5.875% Senior Notes due October 2012, Effective Interest Rate of 6.33% [Member]	Aug. 31, 2013 4.375% Senior Notes due June 2013, Effective Interest Rate of 5.65% [Member]	Apr. 29, 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]	Aug. 31, 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]	Aug. 31, 2013 5.750% Senior Notes due January 2015, Effective Interest Rate of 5.89% [Member]	Aug. 25, 2012 5.750% Senior Notes due January 2015, Effective Interest Rate of 5.89% [Member]	Aug. 31, 2013 5.500% Senior Notes due November 2015, Effective Interest Rate of 4.86% [Member]	Aug. 25, 2012 5.500% Senior Notes due November 2015, Effective Interest Rate of 4.86% [Member]	Aug. 31, 2013 6.950% Senior Notes due June 2016, Effective Interest Rate of 7.09% [Member]	Aug. 25, 2012 6.950% Senior Notes due June 2016, Effective Interest Rate of 7.09% [Member]	Aug. 31, 2013 7.125% Senior Notes due August 2018, Effective Interest Rate of 7.28% [Member]	Aug. 25, 2012 7.125% Senior Notes due August 2018, Effective Interest Rate of 7.28% [Member]	Aug. 31, 2013 4.000% Senior Notes due November 2020, Effective Interest Rate of 4.43% [Member]	Aug. 25, 2012 4.000% Senior Notes due November 2020, Effective Interest Rate of 4.43% [Member]	Aug. 31, 2013 3.700% Senior Notes due April 2022, Effective Interest Rate of 3.85% [Member]	Aug. 25, 2012 3.700% Senior Notes due April 2022, Effective Interest Rate of 3.85% [Member]	Apr. 24, 2012 3.700% Senior Notes due April 2022, Effective Interest Rate of 3.85% [Member]	Aug. 31, 2013 2.875% Senior Notes due January 2023, Effective Interest Rate of 3.21% [Member]	Nov. 13, 2012 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]	Aug. 31, 2013 3.125% Senior Notes due July 2023, Effective Interest Rate of 3.26% [Member]	Apr. 29, 2013 3.125% Senior Notes due July 2023, Effective Interest Rate of 3.26% [Member]	Aug. 25, 2012 3.125% Senior Notes due July 2023, Effective Interest Rate of 3.26% [Member]	Aug. 31, 2013 Commercial Paper, Weighted Average Interest Rate of 0.29% and 0.42% at August 31, 2013 and August 25, 2012 [Member]	Aug. 25, 2012 Commercial Paper, Weighted Average Interest Rate of 0.29% and 0.42% at August 31, 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]
Debt Instrument [Line Items]
Stated interest rate percentage	5.875%	5.875%	5.875%	4.375%	4.375%	4.375%	6.50%	6.50%	5.75%	5.75%	5.50%	5.50%	6.95%	6.95%	7.125%	7.125%	4.00%	4.00%	3.70%	3.70%	3.70%	2.875%	2.875%	2.875%	3.125%	3.125%	3.125%
Effective interest rate	6.33%		6.33%	5.65%		5.65%	6.63%	6.63%	5.89%	5.89%	4.86%	4.86%	7.09%	7.09%	7.28%	7.28%	4.43%	4.43%	3.85%	3.85%		3.21%		3.21%	3.26%		3.26%
Debt instrument, due date	October 2012	October 2012	October 2012	June 2013	June 2013	June 2013	January 2014	January 2014	January 2015	January 2015	November 2015	November 2015	June 2016	June 2016	August 2018	August 2018	November 2020	November 2020	April 2022	April 2022	April 2022	January 2023	January 2023	January 2023	July 2023	July 2023	July 2023
Weighted average interest rate of commercial paper																												0.29%	0.42%
Weighted average interest rate of unsecured, peso denominated borrowings																														4.57%

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Fair Value Measurements - Change in Contingent Consideration Liability at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2013
Fair Value Disclosures [Abstract]
Fair value - beginning of period	$ 0
Fair value of contingent consideration issued during the period	(22,678)
Change in fair value	22,436
Fair value - end of period	$ (242)

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Goodwill and Intangibles - Schedule of Carrying Amounts of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2013
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 58,700
Accumulated Amortization	(2,884)
Impairment	(4,100)
Net Carrying Amount	51,716
Technology [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Gross Carrying Amount	9,700
Accumulated Amortization	(1,365)
Net Carrying Amount	8,335
Noncompete Agreement [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Gross Carrying Amount	1,300
Accumulated Amortization	(183)
Net Carrying Amount	1,117
Customer Relationships [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	10 years
Gross Carrying Amount	19,000
Accumulated Amortization	(1,336)
Net Carrying Amount	17,664
Trade Name [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	Indefinite
Gross Carrying Amount	28,700
Impairment	(4,100)
Net Carrying Amount	$ 24,600

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Interest Expense

12 Months Ended

Aug. 31, 2013

Banking And Thrift Interest [Abstract]

Interest Expense

Note J – Interest Expense

Net interest expense consisted of the following:

	Year Ended
(in thousands)	August 31, 2013			August 25, 2012			August 27, 2011
Interest expense	$	188,324		$	178,547		$	173,674
Interest income		(1,606	)		(1,397	)		(2,058	)
Capitalized interest		(1,303	)		(1,245	)		(1,059	)
	$	185,415		$	175,905		$	170,557

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Marketable Securities

12 Months Ended

Aug. 31, 2013

Investments Debt And Equity Securities [Abstract]

Marketable Securities

Note F – 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:

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

	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 August 31, 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 sale of marketable securities during fiscal 2013, fiscal 2012, or fiscal 2011.

The Company holds 45 securities that are in an unrealized loss position of approximately $277 thousand at August 31, 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 its intent and ability to hold the investments until maturity or until recovery of fair value.

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Financing - Scheduled Maturities of Long-Term Debt (Detail) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2013	Aug. 25, 2012
Debt Disclosure [Abstract]
2014	$ 963,267
2015	500,000
2016	500,000
2017
2018	250,000
Thereafter	1,800,000
Long-term debt	$ 4,013,267	$ 3,718,302

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Acquisition

12 Months Ended

Aug. 31, 2013

Business Combinations [Abstract]

Acquisition

Note M – 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, up to a $5 million holdback payment for working capital true-ups, and contingent payments not to exceed $30 million. During the third quarter of fiscal 2013, the Company paid the holdback payment for working capital true-ups of $1.1 million. With this acquisition, the Company expects to bolster its online presence in the 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 results of operations. The purchase price allocation resulted in goodwill of $83.4 million and intangible assets totaling $58.7 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.

During the fourth quarter of fiscal 2013, the Company determined AutoAnything is not likely to achieve the operating income targets necessary to earn the contingent consideration. Therefore, the contingent consideration was adjusted to reflect the fair value at August 31, 2013, of $0.2 million, resulting in a decrease in the contingent consideration liability of $23.3 million during the fourth quarter of fiscal 2013. See “Note E – Fair Value Measurements” for further discussion.

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Stock Repurchase Program

12 Months Ended

Aug. 31, 2013

Equity [Abstract]

Stock Repurchase Program

Note K – Stock Repurchase Program

During 1998, the Company announced a program permitting the Company to repurchase a portion of its outstanding shares not to exceed a dollar maximum established by the Board. The program was last amended on June 11, 2013 to increase the repurchase authorization to $13.40 billion from $12.65 billion. From January 1998 to August 31, 2013, the Company has repurchased a total of 134.6 million shares at an aggregate cost of $12.93 billion.

The Company’s share repurchase activity consisted of the following:

	Year Ended
(in thousands)	August 31, 2013		August 25, 2012		August 27, 2011
Amount	$	1,387,315	$	1,362,869	$	1,466,802
Shares		3,511		3,795		5,598

During the fiscal year 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.

Subsequent to August 31, 2013, the Company has repurchased 355,150 shares of common stock at an aggregate cost of $149.8 million.

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Document and Entity Information (USD $)	12 Months Ended
	Aug. 31, 2013	Oct. 21, 2013	Feb. 09, 2013
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Aug. 31, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	FY
Entity Registrant Name	AUTOZONE INC
Entity Central Index Key	0000866787
Current Fiscal Year End Date	--08-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		34,031,760
Entity Public Float			$ 13,781,127,110

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Goodwill and Intangibles - Schedule of Future Amortization Expense for Finite Lived Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2013
Goodwill And Intangible Assets Disclosure [Abstract]
2014	$ 4,100
2015	4,100
2016	4,100
2017	4,100
2018	2,553
Thereafter	8,163
Total future amortization expense	$ 27,116

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Pension and Savings Plans

12 Months Ended

Aug. 31, 2013

Compensation And Retirement Disclosure [Abstract]

Pension and Savings Plans

Note L – Pension and Savings Plans

Prior to January 1, 2003, substantially all full-time employees were covered by a defined benefit pension plan. The benefits under the plan were based on years of service and the employee’s highest consecutive five-year average compensation. On January 1, 2003, the plan was frozen. Accordingly, pension plan participants will earn no new benefits under the plan formula and no new participants will join the pension plan.

On January 1, 2003, the Company’s supplemental defined benefit pension plan for certain highly compensated employees was also frozen. Accordingly, plan participants will earn no new benefits under the plan formula and no new participants will join the pension plan.

The Company has recognized the unfunded status of the defined pension plans in its Consolidated Balance Sheets, which represents the difference between the fair value of pension plan assets and the projected benefit obligations of its defined benefit pension plans. The net unrecognized actuarial losses and unrecognized prior service costs are recorded in Accumulated other comprehensive loss. These amounts will be subsequently recognized as net periodic pension expense pursuant to the Company’s historical accounting policy for amortizing such amounts. Further, actuarial gains and losses that arise in subsequent periods and are not recognized as net periodic pension expense in the same periods will be recognized as a component of other comprehensive income. Those amounts will be subsequently recognized as a component of net periodic pension expense on the same basis as the amounts previously recognized in Accumulated other comprehensive loss.

The Company’s investment strategy for pension plan assets is to utilize a diversified mix of domestic and international equity and fixed income portfolios to earn a long-term investment return that meets the Company’s pension plan obligations. The pension plan assets are invested primarily in listed securities, and the pension plans hold only a minimal investment in AutoZone common stock that is entirely at the discretion of third-party pension fund investment managers. The Company’s largest holding classes, fixed income bonds and U.S. equities, are invested with a fund manager that holds diversified portfolios. Accordingly, the Company does not have any significant concentrations of risk in particular securities, issuers, sectors, industries or geographic regions. Alternative investment strategies, are in the process of being liquidated and constitute less than 1% of the pension plan assets. The Company’s investment managers are prohibited from using derivatives for speculative purposes and are not permitted to use derivatives to leverage a portfolio.

The following is a description of the valuation methodologies used for the Company’s investments measured at fair value:

U.S., international, emerging, and high yield equities – These investments are commingled funds and are valued using the net asset values, which are determined by valuing investments at the closing price or last trade reported on the major market on which the individual securities are traded. These investments are subject to annual audits.

Alternative investments – This category represents a hedge fund of funds made up of 9 different hedge fund managers diversified over 4 different hedge strategies. The fair value of the hedge fund of funds is determined using valuations provided by the third party administrator for each of the underlying funds.

Fixed income securities – The fair values of corporate, U.S. government securities and other fixed income securities are estimated by using bid evaluation pricing models or quoted prices of securities with similar characteristics.

Cash and cash equivalents – These investments include cash equivalents valued using exchange rates provided by an industry pricing vendor and commingled funds valued using the net asset value. These investments also include cash.

The fair values of investments by level and asset category and the weighted-average asset allocations of the Company’s pension plans at the measurement date are presented in the following table:

August 31, 2013
	Fair Value		Asset Allocation						Fair Value Hierarchy
(in thousands)			Actual			Target			Level 1		Level 2		Level 3
U.S. equities	$	57,931		27.9	%		30.0	%	$	—	$	57,931	$	—
International equities		38,145		18.3			20.0			—		38,145		—
Emerging equities		19,030		9.1			10.0			—		19,030		—
High yield equities		19,858		9.5			10.0			—		19,858		—
Alternative investments		1,226		0.6			—			—		—		1,226
Fixed income securities		59,500		28.6			30.0			—		59,500		—
Cash and cash equivalents		12,430		6.0			—			—		12,430		—
	$	208,120		100.0	%		100.0	%	$	—	$	206,894	$	1,226

August 25, 2012
	Fair Value		Asset Allocation						Fair Value Hierarchy
(in thousands)			Actual			Target			Level 1		Level 2		Level 3
U.S. equities	$	51,101		28.2	%		30.0	%	$	—	$	51,101	$	—
International equities		31,767		17.5			20.0			—		31,767		—
Emerging equities		16,471		9.1			10.0			—		16,471		—
High yield equities		17,378		9.6			10.0			—		17,378		—
Alternative investments		2,404		1.3			—			—		—		2,404
Fixed income securities		47,667		26.3			30.0			—		47,667		—
Cash and cash equivalents		14,621		8.0			—			—		14,621		—
	$	181,409		100.0	%		100.0	%	$	—	$	179,005	$	2,404

The asset allocations in the charts above include $11.0 million and $8.7 million in cash contributions made prior to the balance sheet date of August 31, 2013, and August 25, 2012, respectively. Subsequent to August 31, 2013, and August 25, 2012, these cash contributions were allocated to the pension plan investments in accordance with the targeted asset allocation.

In August 2011, the Company’s Investment Committee approved a revised asset allocation target for the investments held by the pension plan. Based on the revised asset allocation target, the expected long-term rate of return on plan assets changed from 8.0% in fiscal 2011 to 7.5% for the years ending August 25, 2012, and August 31, 2013.

The change in fair value of Level 3 assets that use significant unobservable inputs is presented in the following table:

(in thousands)	Level 3 Assets
Beginning balance – August 25, 2012	$	2,404
Actual return on plan assets:
Assets held at August 31, 2013		60
Assets sold during the year		72
Sales and settlements		(1,310	)
Ending balance – August 31, 2013	$	1,226

The following table sets forth the plans’ funded status and amounts recognized in the Company’s Consolidated Balance Sheets:

(in thousands)	August 31, 2013			August 25, 2012
Change in Projected Benefit Obligation:
Projected benefit obligation at beginning of year	$	305,206		$	241,645
Interest cost		11,746			12,214
Actuarial (gains) losses		(53,756	)		56,749
Benefits paid		(6,416	)		(5,402	)
Benefit obligations at end of year	$	256,780		$	305,206
Change in Plan Assets:
Fair value of plan assets at beginning of year	$	181,409		$	156,883
Actual return on plan assets		16,218			14,505
Employer contributions		16,909			15,423
Benefits paid		(6,416	)		(5,402	)
Fair value of plan assets at end of year	$	208,120		$	181,409
Amount Recognized in the Statement of Financial Position:
Current liabilities	$	(124	)	$	(30	)
Long-term liabilities		(48,536	)		(123,767	)
Net amount recognized	$	(48,660	)	$	(123,797	)
Amount Recognized in Accumulated Other Comprehensive Loss and not yet reflected in Net Periodic Benefit Cost:
Net actuarial loss	$	(83,601	)	$	(154,678	)
Accumulated other comprehensive loss	$	(83,601	)	$	(154,678	)
Amount Recognized in Accumulated Other Comprehensive Loss and not yet reflected in Net Periodic Benefit Cost and expected to be amortized in next year’s Net Periodic Benefit Cost:
Net actuarial loss	$	(6,879	)	$	(14,721	)
Amount recognized	$	(6,879	)	$	(14,721	)

Net periodic benefit expense consisted of the following:

	Year Ended
(in thousands)	August 31, 2013			August 25, 2012			August 27, 2011
Interest cost	$	11,746		$	12,214		$	11,135
Expected return on plan assets		(13,617	)		(11,718	)		(9,326	)
Amortization of prior service cost		—			—			—
Recognized net actuarial losses		14,721			9,795			9,405
Net periodic benefit expense	$	12,850		$	10,291		$	11,214

The actuarial assumptions used in determining the projected benefit obligation include the following:

	Year Ended
	August 31, 2013			August 25, 2012			August 27, 2011
Weighted average discount rate		5.19	%		3.90	%		5.13	%
Expected long-term rate of return on plan assets		7.50	%		7.50	%		8.00	%

As the plan benefits are frozen, increases in future compensation levels no longer impact the calculation and there is no service cost. The discount rate is determined as of the measurement date and is based on the calculated yield of a portfolio of high-grade corporate bonds with cash flows that generally match the Company’s expected benefit payments in future years. The expected long-term rate of return on plan assets is based on the historical relationships between the investment classes and the capital markets, updated for current conditions.

The Company makes annual contributions in amounts at least equal to the minimum funding requirements of the Employee Retirement Income Security Act of 1974. The Company contributed $16.9 million to the plans in fiscal 2013, $15.4 million to the plans in fiscal 2012 and $34.1 million to the plans in fiscal 2011. The Company expects to contribute approximately $4 million to the plans in fiscal 2014; however, a change to the expected cash funding may be impacted by a change in interest rates or a change in the actual or expected return on plan assets.

Based on current assumptions about future events, benefit payments are expected to be paid as follows for each of the following fiscal years. Actual benefit payments may vary significantly from the following estimates:

(in thousands)	Benefit Payments
2014	$	9,125
2015		9,205
2016		9,912
2017		10,604
2018		11,193
2019 – 2023		65,396

The Company has a 401(k) plan that covers all domestic employees who meet the plan’s participation requirements. The plan features include Company matching contributions, immediate 100% vesting of Company contributions and a savings option up to 25% of qualified earnings. The Company makes matching contributions, per pay period, up to a specified percentage of employees’ contributions as approved by the Board. The Company made matching contributions to employee accounts in connection with the 401(k) plan of $14.1 million in fiscal 2013, $14.4 million in fiscal 2012 and $13.3 million in fiscal 2011.

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Marketable Securities - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2013 Security	Aug. 25, 2012
Investments Debt And Equity Securities [Abstract]
Available for sale securities debt maturity period range	Less than one year to approximately 3 years
Number of securities available for sale loss position	45
Available-For-Sale Marketable Securities, Gross Unrealized Losses	$ 277	$ 20

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Marketable Securities - Available-for-Sale Marketable Securities (Detail) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2013	Aug. 25, 2012
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	$ 82,198	$ 75,673
Available-For-Sale Marketable Securities, Gross Unrealized Gains	240	561
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(277)	(20)
Available-For-Sale Marketable Securities, Fair Value	82,161	76,214
Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	27,803	26,215
Available-For-Sale Marketable Securities, Gross Unrealized Gains	148	307
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(67)
Available-For-Sale Marketable Securities, Fair Value	27,884	26,522
Government Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	21,372	20,790
Available-For-Sale Marketable Securities, Gross Unrealized Gains	18	117
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(67)	(1)
Available-For-Sale Marketable Securities, Fair Value	21,323	20,906
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	7,198	4,369
Available-For-Sale Marketable Securities, Gross Unrealized Gains	24	17
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(138)	(19)
Available-For-Sale Marketable Securities, Fair Value	7,084	4,367
Asset-Backed Securities and Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	25,825	24,299
Available-For-Sale Marketable Securities, Gross Unrealized Gains	50	120
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(5)
Available-For-Sale Marketable Securities, Fair Value	$ 25,870	$ 24,419

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Leases - Additional Information (Detail) (USD $)	12 Months Ended
	Aug. 31, 2013	Aug. 31, 2012	Aug. 31, 2011	Aug. 25, 2012
Leases [Line Items]
Rental expense	$ 246,300,000	$ 229,400,000	$ 213,800,000
Capital lease assets	107,500,000			104,200,000
Capital lease, accumulated amortization	44,800,000			36,400,000
Capital lease obligations	106,200,000			102,300,000
Current portion of capital lease obligations	32,246,000			29,842,000
Deferred rent	96,500,000			86,900,000
Remaining aggregate rental obligation	1,957,222,000
Sublease in Connection with Sale of TruckPro Business [Member]
Leases [Line Items]
Initial term of subleased properties in connection with sale of TruckPro business	Not less than 20 years
Remaining aggregate rental obligation	$ 15,600,000