10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

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

For the quarterly period ended May 9, 2015, or

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

For the transition period from                      to                     .

Commission file number 1-10714

AUTOZONE, INC.

(Exact name of registrant as specified in its charter)

Nevada	62-1482048
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
123 South Front Street, Memphis, Tennessee	38103
(Address of principal executive offices)	(Zip Code)

(901) 495-6500

(Registrant’s telephone number, including area code)

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

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

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

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

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

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

Common Stock, $.01 Par Value – 30,872,432 shares outstanding as of June 12, 2015.

TABLE OF CONTENTS

PART I.	FINANCIAL INFORMATION
Item 1.	Financial Statements	3
	CONDENSED CONSOLIDATED BALANCE SHEETS	3
	CONDENSED CONSOLIDATED STATEMENTS OF INCOME	4
	CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME	4
	CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS	5
	NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS	6
	REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM	15
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	16
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	24
Item 4.	Controls and Procedures	24
Item 4T.	Controls and Procedures	24
PART II.	OTHER INFORMATION
Item 1.	Legal Proceedings	25
Item 1A.	Risk Factors	25
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	25
Item 3.	Defaults Upon Senior Securities	25
Item 4.	Mine Safety Disclosures	25
Item 5.	Other Information	25
Item 6.	Exhibits	26
SIGNATURES		27
EXHIBIT INDEX		28

2

PART I. FINANCIAL INFORMATION

Item 1. Financial Statements.

AUTOZONE, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

(in thousands)	May 9, 2015			August 30, 2014
Assets
Current assets:
Cash and cash equivalents	$	153,288		$	124,485
Accounts receivable		212,068			200,899
Merchandise inventories		3,468,249			3,140,100
Other current assets		110,075			110,420
Deferred income taxes		6,810			4,708
Total current assets		3,950,490			3,580,612
Property and equipment:
Property and equipment		5,747,901			5,500,674
Less: Accumulated depreciation and amortization		(2,321,513	)		(2,190,199	)
		3,426,388			3,310,475
Goodwill		384,613			367,829
Deferred income taxes		48,447			45,137
Other long-term assets		222,502			213,805
		655,562			626,771
	$	8,032,440		$	7,517,858
Liabilities and Stockholders’ Deficit
Current liabilities:
Accounts payable	$	3,845,129		$	3,609,199
Accrued expenses and other		499,973			481,894
Income taxes payable		118,107			41,200
Deferred income taxes		229,893			227,891
Short-term borrowings		—			180,910
Total current liabilities		4,693,102			4,541,094
Long-term debt		4,533,329			4,162,890
Other long-term liabilities		449,254			435,731
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; 32,045 shares issued and 31,239 shares outstanding as of May 9, 2015; 33,858 shares issued and 32,304 shares outstanding as of August 30, 2014		321			339
Additional paid-in capital		914,803			843,504
Retained deficit		(1,819,875	)		(1,529,123	)
Accumulated other comprehensive loss		(197,182	)		(128,903	)
Treasury stock, at cost		(541,312	)		(807,674	)
Total stockholders’ deficit		(1,643,245	)		(1,621,857	)
	$	8,032,440		$	7,517,858

See Notes to Condensed Consolidated Financial Statements.

3

AUTOZONE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(Unaudited)

	Twelve Weeks Ended				Thirty-Six Weeks Ended
(in thousands, except per share data)	May 9, 2015		May 10, 2014		May 9, 2015		May 10, 2014
Net sales	$	2,493,021	$	2,341,545	$	6,896,936	$	6,425,617
Cost of sales, including warehouse and delivery expenses		1,190,232		1,124,587		3,297,453		3,085,927
Gross profit		1,302,789		1,216,958		3,599,483		3,339,690
Operating, selling, general and administrative expenses		788,840		738,006		2,315,704		2,139,668
Operating profit		513,949		478,952		1,283,779		1,200,022
Interest expense, net		31,779		36,162		103,374		118,083
Income before income taxes		482,170		442,790		1,180,405		1,081,939
Income taxes		173,099		157,633		421,301		385,865
Net income	$	309,071	$	285,157	$	759,104	$	696,074
Weighted average shares for basic earnings per share		31,643		33,073		31,893		33,610
Effect of dilutive stock equivalents		658		643		641		607
Weighted average shares for diluted earnings per share		32,301		33,716		32,534		34,217
Basic earnings per share	$	9.77	$	8.62	$	23.80	$	20.71
Diluted earnings per share	$	9.57	$	8.46	$	23.33	$	20.34

See Notes to Condensed Consolidated Financial Statements.

AUTOZONE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)

	Twelve Weeks Ended						Thirty-Six Weeks Ended
(in thousands)	May 9, 2015			May 10, 2014			May 9, 2015			May 10, 2014
Net income	$	309,071		$	285,157		$	759,104		$	696,074
Other comprehensive (loss) income:
Pension liability adjustments, net of taxes (1)		1,256			957			3,741			2,864
Foreign currency translation adjustments		(13,285	)		13,700			(72,138	)		12,011
Unrealized gains (losses) on marketable securities, net of taxes (2)		129			(13	)		41			158
Net derivative activities, net of taxes (3)		304			25			77			78
Total other comprehensive (loss) income		(11,596	)		14,669			(68,279	)		15,111
Comprehensive income	$	297,475		$	299,826		$	690,825		$	711,185

(1) Pension liability adjustments are presented net of taxes of $807 in fiscal 2015 and $630 in fiscal 2014 for the twelve weeks ended and $2,449 in fiscal 2015 and $1,898 in fiscal 2014 for the thirty-six weeks ended

(2) Unrealized gains (losses) on marketable securities are presented net of taxes of $69 in fiscal 2015 and $7 in fiscal 2014 for the twelve weeks ended and $22 in fiscal 2015 and $85 in fiscal 2014 for the thirty-six weeks ended

(3) Net derivative activities are presented net of taxes of $264 in fiscal 2015 and $17 in fiscal 2014 for the twelve weeks ended and $49 in fiscal 2015 and $48 in fiscal 2014 for the thirty-six weeks ended

See Notes to Condensed Consolidated Financial Statements.

4

AUTOZONE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

	Thirty-Six Weeks Ended
(in thousands)	May 9, 2015			May 10, 2014
Cash flows from operating activities:
Net income	$	759,104		$	696,074
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of property and equipment and intangibles		183,211			172,286
Amortization of debt origination fees		4,274			4,895
Income tax benefit from exercise of stock options		(44,656	)		(18,296	)
Deferred income taxes		(5,431	)		(21,234	)
Share-based compensation expense		29,688			28,985
Changes in operating assets and liabilities:
Accounts receivable		5,395			(17,757	)
Merchandise inventories		(294,330	)		(267,801	)
Accounts payable and accrued expenses		230,817			240,156
Income taxes payable		121,290			142,925
Other, net		9,750			10,885
Net cash provided by operating activities		999,112			971,118
Cash flows from investing activities:
Capital expenditures		(292,745	)		(261,724	)
Acquisition of business, net of cash		(75,744	)		—
Purchase of intangibles		(10,000	)		(11,112	)
Purchase of marketable securities		(26,438	)		(28,616	)
Proceeds from sale of marketable securities		23,350			25,013
Disposal of capital assets and other, net		(3,147	)		1,471
Net cash used in investing activities		(384,724	)		(274,968	)
Cash flows from financing activities:
Net proceeds from commercial paper		40,700			291,400
Proceeds from issuance of debt		648,829			400,000
Repayment of debt		(500,000	)		(500,000	)
Net proceeds from sale of common stock		57,015			34,412
Purchase of treasury stock		(840,918	)		(911,537	)
Income tax benefit from exercise of stock options		44,656			18,296
Payments of capital lease obligations		(26,664	)		(24,248	)
Other, net		(7,528	)		(2,294	)
Net cash used in financing activities		(583,910	)		(693,971	)
Effect of exchange rate changes on cash		(1,675	)		979
Net increase in cash and cash equivalents		28,803			3,158
Cash and cash equivalents at beginning of period		124,485			142,191
Cash and cash equivalents at end of period	$	153,288		$	145,349

See Notes to Condensed Consolidated Financial Statements.

5

AUTOZONE, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note A – General

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles for interim financial information and with instructions to Form 10-Q and Article 10 of Regulation S-X of the Securities and Exchange Commission’s (the “SEC”) rules and regulations. Accordingly, they do not include all of the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments, including normal recurring accruals, considered necessary for a fair presentation have been included. For further information, refer to the consolidated financial statements and related notes included in the AutoZone, Inc. (“AutoZone” or the “Company”) Annual Report on Form 10-K for the year ended August 30, 2014.

Operating results for the twelve and thirty-six weeks ended May 9, 2015, are not necessarily indicative of the results that may be expected for the fiscal year ending August 29, 2015. Each of the first three quarters of AutoZone’s fiscal year consists of 12 weeks, and the fourth quarter consists of 16 or 17 weeks. The fourth quarters for fiscal 2015 and 2014 each have 16 weeks. Additionally, the Company’s business is somewhat seasonal in nature, with the highest sales generally occurring during the months of February through September and the lowest sales generally occurring in the months of December and January.

Recently Issued Accounting Pronouncements: In August 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-15, Presentation of Financial Statements – Going Concern. ASU 2014-15 will require management to assess an entity’s ability to continue as a going concern for each annual and interim reporting period and to provide related footnote disclosure in circumstances in which substantial doubt exists. The Company does not expect the provision of ASU 2014-15 to have a material impact on its consolidated financial statements as the application of this guidance affects disclosure only. This update will be effective for the Company beginning with its annual period ending August 26, 2017.

In January 2015, the FASB issued ASU 2015-01, Income Statement – Extraordinary and Unusual Items. ASU 2015-01 eliminates from GAAP the concept of extraordinary items. ASU 2015-01 eliminates the separate presentation of extraordinary items but does not change the requirement to disclose material items that are unusual or infrequent in nature. Eliminating the concept of extraordinary items will allow the entity to no longer have to assess whether a particular event or transaction is both unusual in nature and infrequent in occurrence. The Company does not expect the provision of ASU 2015-01 to have a material impact on its consolidated financial statements. This update will be effective for the Company beginning with its annual period ending August 26, 2017.

In April 2015, the FASB issued ASU 2015-03, Interest – Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. ASU 2015-03 requires debt issuance costs to be presented in the balance sheet as a reduction of the related debt liability rather than an asset. The update requires retrospective application and represents a change in accounting principle. The Company does not expect the provision of ASU 2015-03 to have a material impact on its consolidated financial statements, as the application of this guidance affects classification only. This update will be effective for the Company beginning with its annual period ending August 26, 2017.

In April 2015, the FASB issued ASU 2015-04, Compensation – Retirement Benefits (Topic 715): Practical Expedient for the Measurement Date of an Employer’s Defined Benefit Obligation and Plan Assets. ASU 2015-04 allows companies a choice to measure defined benefit plan assets and obligations using the month-end that is closest to the entity’s fiscal year-end and apply that practical expedient consistently from year-to-year. The practical expedient should be applied consistently to all plans if an entity has more than one plan. The Company does not expect the provision of ASU 2015-04 to have a material impact on its consolidated financial statements. This update will be effective for the Company beginning with its fiscal 2017 first quarter.

In April 2015, the FASB issued ASU 2015-05, Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement. ASU 2015-05 clarifies the accounting treatment for fees paid by a customer in cloud computing arrangements. Under the revised guidance, if a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If the cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. The revised guidance will not change a customer’s accounting for service contracts. Upon adoption, a reporting entity can elect to apply the new guidance prospectively after the effective date, or retrospectively. The Company does not expect the provision of ASU 2015-05 to have a material impact on its consolidated financial statements. This update will be effective for the Company beginning with its fiscal 2017 first quarter.

Note B – Share-Based Payments

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

Total share-based compensation expense (a component of Operating, selling, general and administrative expenses) was $9.5 million for the twelve week period ended May 9, 2015, and was $8.3 million for the comparable prior year period. Share-based compensation expense was $29.7 million for the thirty-six week period ended May 9, 2015, and was $29.0 million for the comparable prior year period.

6

During the thirty-six week period ended May 9, 2015, 311,285 shares of stock options were exercised at a weighted average exercise price of $186.40. In the comparable prior year period, 194,130 shares of stock options were exercised at a weighted average exercise price of $177.95.

The Company made stock option grants of 329,700 shares during the thirty-six week period ended May 9, 2015, and granted options to purchase 347,615 shares during the comparable prior year period. The weighted average fair value of the stock option awards granted during the thirty-six week periods ended May 9, 2015, and May 10, 2014, using the Black-Scholes-Merton multiple-option pricing valuation model, was $106.26 and $96.92 per share, respectively, using the following weighted average key assumptions:

	Thirty-Six Weeks Ended
	May 9, 2015			May 10, 2014
Expected price volatility		20	%		23	%
Risk-free interest rate		1.4	%		1.0	%
Weighted average expected lives (in years)		5.1			5.2
Forfeiture rate		9	%		9	%
Dividend yield		0	%		0	%

See AutoZone’s Annual Report on Form 10-K for the year ended August 30, 2014, for a discussion regarding the methodology used in developing AutoZone’s assumptions to determine the fair value of the option awards and a description of AutoZone’s 2011 Equity Incentive Award Plan, the 2011 Director Compensation Program, and the 2014 Director Compensation Plan.

For the twelve week period ended May 9, 2015, 1,140 stock options were excluded from the diluted earnings per share computation because they would have been anti-dilutive. For the comparable prior year period, no stock options shares were excluded from the dilutive earnings per share computation. There were 2,240 anti-dilutive shares excluded from the diluted earnings per share computation for the thirty-six week period ended May 9, 2015, and no stock options were excluded for the comparable prior year period.

Note C – Fair Value Measurements

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

The hierarchy prioritizes the inputs into three broad levels:

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

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

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

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

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

	May 9, 2015
(in thousands)	Level 1		Level 2		Level 3		Fair Value
Other current assets	$	13,595	$	493	$	—	$	14,088
Other long-term assets		53,716		20,603		—		74,319
	$	67,311	$	21,096	$	—	$	88,407
	August 30, 2014
(in thousands)	Level 1		Level 2		Level 3		Fair Value
Other current assets	$	9,801	$	599	$	—	$	10,400
Other long-term assets		53,133		21,722		—		74,855
	$	62,934	$	22,321	$	—	$	85,255

At May 9, 2015, the fair value measurement amounts for assets and liabilities recorded in the accompanying Condensed Consolidated Balance Sheet consisted of short-term marketable securities of $14.1 million, which are included within Other current assets, and long-term marketable securities of $74.3 million, which are included in Other long-term assets. The Company’s marketable securities are typically valued at the closing price in the principal active market as of the last business day of the quarter or through the use of other market inputs relating to the securities, including benchmark yields and reported trades. The fair values of the marketable securities, by asset class, are described in “Note D – Marketable Securities.”

7

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

Non-financial assets are required to be measured at fair value on a non-recurring basis in certain circumstances, including the event of impairment. The assets could include assets acquired in an acquisition as well as property, plant and equipment that are determined to be impaired. During the thirty-six week periods ended May 9, 2015 and May 10, 2014 the Company did not have any significant non-financial assets measured at fair value on a non-recurring basis in periods subsequent to initial recognition.

Financial Instruments not Recognized at Fair Value

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

Note D – Marketable Securities

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

	May 9, 2015
(in thousands)	Amortized Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate securities	$	35,226	$	159	$	(4	)	$	35,381
Government bonds		27,254		61		—			27,315
Mortgage-backed securities		10,103		26		(82	)		10,047
Asset-backed securities and other		15,643		21		—			15,664
	$	88,226	$	267	$	(86	)	$	88,407
	August 30, 2014
(in thousands)	Amortized Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate securities	$	37,265	$	137	$	(15	)	$	37,387
Government bonds		16,822		16		(1	)		16,837
Mortgage-backed securities		8,791		22		(77	)		8,736
Asset-backed securities and other		22,260		35		—			22,295
	$	85,138	$	210	$	(93	)	$	85,255

The debt securities held at May 9, 2015 had effective maturities ranging from less than one year to approximately three years. The Company did not realize any material gains or losses on its marketable securities during the thirty-six week period ended May 9, 2015.

The Company holds 19 securities that are in an unrealized loss position of approximately $86 thousand at May 9, 2015. The Company has the intent and ability to hold these investments until recovery of fair value or maturity, and does not deem the investments to be impaired on an other than temporary basis. In evaluating whether the securities are deemed to be impaired on an other than temporary basis, the Company considers factors such as the duration and severity of the loss position, the credit worthiness of the investee, the term to maturity and the intent and ability to hold the investments until maturity or until recovery of fair value.

Included above in total marketable securities are $45.5 million of marketable securities transferred by the Company’s insurance captive to a trust account to secure its obligations to an insurance company related to future workers’ compensation and casualty losses.

Note E – Derivative Financial Instruments

At May 9, 2015, the Company had $11.5 million recorded in Accumulated other comprehensive loss related to realized losses associated with terminated interest rate swap and treasury rate lock derivatives which were designated as hedging instruments. Net losses are amortized into Interest expense over the remaining life of the associated debt. During the twelve week period ended May 9, 2015, the Company reclassified $42 thousand of net losses from Accumulated other comprehensive loss to Interest expense. In the comparable prior year period, the Company reclassified $42 thousand from Accumulated other comprehensive loss to Interest expense. During the thirty-six week period ended May 9, 2015, the Company reclassified $126 thousand of net losses from Accumulated other comprehensive loss to Interest expense. In the comparable prior year period, the Company reclassified $126 thousand of net losses from Accumulated other comprehensive loss to Interest expense. The Company expects to reclassify $1.2 million of net losses from Accumulated other comprehensive loss to Interest expense over the next twelve months.

8

Note F – Merchandise Inventories

Inventories are stated at the lower of cost or market using the last-in, first-out (“LIFO”) method for domestic inventories and the first-in, first-out (“FIFO”) method for Mexico and Brazil inventories. Included in inventories are related purchasing, storage and handling costs. Due to price deflation on the Company’s merchandise purchases, the Company’s domestic inventory balances are effectively maintained under the FIFO method. The Company’s policy is not to write up inventory in excess of replacement cost. The cumulative balance of this unrecorded adjustment, which will be reduced upon experiencing price inflation on the Company’s merchandise purchases, was $323.8 million at May 9, 2015 and $307.2 million at August 30, 2014.

Note G – Pension and Savings Plans

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

	Twelve Weeks Ended						Thirty-Six Weeks Ended
(in thousands)	May 9, 2015			May 10, 2014			May 9, 2015			May 10, 2014
Interest cost	$	2,847		$	3,016		$	8,542		$	9,048
Expected return on plan assets		(3,757	)		(3,550	)		(11,272	)		(10,650	)
Amortization of net loss		2,063			1,587			6,190			4,761
Net periodic pension expense	$	1,153		$	1,053		$	3,460		$	3,159

The Company makes contributions in amounts at least equal to the minimum funding requirements of the Employee Retirement Income Security Act of 1974, as amended by the Pension Protection Act of 2006. During the thirty-six week period ended May 9, 2015, the Company made contributions to its funded plan in the amount of $3.9 million. The Company expects to contribute approximately $13.0 million to the plan during the remainder of fiscal 2015; however, a change to the expected cash funding may be impacted by a change in interest rates or a change in the actual or expected return on plan assets.

Note H – Financing

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

(in thousands)	May 9, 2015		August 30, 2014
5.750% Senior Notes due January 2015, effective interest rate of 5.89%	$	—	$	500,000
5.500% Senior Notes due November 2015, effective interest rate of 4.86%		300,000		300,000
6.950% Senior Notes due June 2016, effective interest rate of 7.09%		200,000		200,000
1.300% Senior Notes due January 2017, effective interest rate of 1.43%		400,000		400,000
7.125% Senior Notes due August 2018, effective interest rate of 7.28%		250,000		250,000
4.000% Senior Notes due November 2020, effective interest rate of 4.43%		500,000		500,000
2.500% Senior Notes due April 2021, effective interest rate of 2.62%		249,905		—
3.700% Senior Notes due April 2022, effective interest rate of 3.85%		500,000		500,000
2.875% Senior Notes due January 2023, effective interest rate of 3.21%		300,000		300,000
3.125% Senior Notes due July 2023, effective interest rate of 3.26%		500,000		500,000
3.250% Senior Notes due April 2025, effective interest rate of 3.36%		398,924		—
Commercial paper, weighted average interest rate of 0.45% and 0.27% at May 9, 2015 and August 30, 2014, respectively		934,500		893,800
Total debt		4,533,329		4,343,800
Less: Short-term borrowings		—		180,910
Long-term debt	$	4,533,329	$	4,162,890

As of May 9, 2015, $934.5 million of commercial paper borrowings and the $300 million 5.500% Senior Notes due November 2015 are classified as long-term in the accompanying Consolidated Balance Sheets as the Company has the ability and intent to refinance on a long-term basis through available capacity in its revolving credit facilities. As of May 9, 2015, the Company had $1.711 billion of availability under its $1.750 billion revolving credit facilities, which would allow it to replace these short-term obligations with long-term financing.

On April 29, 2015, the Company issued $400 million in 3.250% Notes due April 2025 and $250 million in 2.500% Notes due April 2021 under its shelf registration statement filed with the SEC on April 15, 2015 (the “New Shelf Registration”). The New 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 location openings, stock repurchases and acquisitions. Proceeds from the debt issuances were used to repay a portion of the outstanding commercial paper borrowings, which were used to repay the $500 million in 5.750% Senior Notes due in January 2015, and for general corporate purposes.

9

On January 14, 2014, the Company issued $400 million in 1.300% Senior Notes due January 2017 under its shelf registration statement filed with the SEC on April 17, 2012 (the “Shelf Registration”). Proceeds from the debt issuance on January 14, 2014, were used to repay a portion of the $500 million in 6.500% Senior Notes due January 2014. The Company used commercial paper borrowings to repay the remainder of the 6.500% Senior Notes.

On December 19, 2014, the Company amended and restated its existing revolving credit facility (the “Multi-Year Credit Agreement”) by increasing the amount of capital leases allowable to $225 million, extending the expiration date by two years, and renegotiations of other terms and conditions. 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 is $1.25 billion and may be increased to $1.5 billion prior to the maturity date at the Company’s election and subject to bank credit capacity and approval, may include up to $200 million in letters of credit and may include up to $225 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 December 2019.

On December 19, 2014, the Company entered into a new revolving credit facility (the “364-Day Credit Agreement”). The credit facility is available to primarily support commercial paper borrowings and other short-term unsecured bank loans. The 364-Day Credit Agreement provides for loans in the principal amount of up to $500 million. Under the credit facility, the Company may borrow funds consisting of Eurodollar loans, base rate loans, or a combination of both. Interest accrues on Eurodollar loans at a defined Eurodollar rate, defined as LIBOR plus the applicable margin, 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. This credit facility expires on December 19, 2015, but the Company may request an extension of the termination date for 364 days no later than 45 days prior to December 19, 2015, subject to bank approval. In addition, the Company has the right to request a term-loan, at least 15 days prior to December 19, 2015, up to one year from the termination date, subject to a 1% penalty.

As of May 9, 2015, the Company had no outstanding borrowings under each of the revolving credit facilities and $3.5 million of outstanding letters of credit under the Multi-Year Credit Agreement.

The fair value of the Company’s debt was estimated at $4.635 billion as of May 9, 2015 and $4.480 billion as of August 30, 2014, 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 $101.2 million at May 9, 2015 and $136.6 million at August 30, 2014.

Note I – Stock Repurchase Program

From January 1, 1998 to May 9, 2015 the Company has repurchased a total of 138.3 million shares at an aggregate cost of $14.872 billion, including 1,376,933 shares of its common stock at an aggregate cost of $840.9 million during thirty-six week period ended May 9, 2015. On March 24, 2015, the Board voted to increase the authorization by $750 million to raise the cumulative share repurchase authorization from $14.9 billion to $15.65 billion. Considering the cumulative repurchases as of May 9, 2015 the Company had $778.3 million remaining under the Board’s authorization to repurchase its common stock.

Subsequent to May 9, 2015 the Company has repurchased 453,006 shares of its common stock at an aggregate cost of $308.5 million.

During the thirty-six week period ended May 9, 2015, the Company retired 2.1 million shares of treasury stock which had previously been repurchased under the Company’s share repurchase program. The retirement increased Retained deficit by $1.050 billion and decreased Additional paid-in capital by $57.4 million. During the comparable prior year period, the Company retired 3.2 million shares of treasury stock, which increased Retained deficit by $1.220 billion and decreased Additional paid-in capital by $74.0 million.

10

Note J – Accumulated Other Comprehensive Loss

Accumulated other comprehensive loss includes certain adjustments to pension liabilities, foreign currency translation adjustments, certain activity for interest rate swaps and treasury rate locks that qualify as cash flow hedges and unrealized gains (losses) on available-for-sale securities. Changes in Accumulated other comprehensive loss for the twelve week periods ended May 9, 2015 and May 10, 2014 consisted of the following:

(in thousands)	Pension Liability			Foreign Currency (3)			Net Unrealized Gain on Securities			Derivatives			Total
Balance at February 14, 2015	$	(61,335	)	$	(116,689	)	$	(12	)	$	(7,550	)	$	(185,586	)
Other comprehensive (loss) income before reclassifications		—			(13,285	)		121			277			(12,887	)
Amounts reclassified from Accumulated other comprehensive loss (1)		1,256	(2)		—			8	(4)		27	(5)		1,291
Balance at May 9, 2015	$	(60,079	)	$	(129,974	)	$	117		$	(7,246	)	$	(197,182	)
(in thousands)	Pension Liability			Foreign Currency (3)			Net Unrealized Gain on Securities			Derivatives			Total
Balance at February 15, 2014	$	(48,954	)	$	(64,172	)	$	146		$	(7,366	)	$	(120,346	)
Other comprehensive income before reclassifications		—			13,700			23			—			13,723
Amounts reclassified from Accumulated other comprehensive loss (1)		957	(2)		—			(36	)(4)		25	(5)		946
Balance at May 10, 2014	$	(47,997	)	$	(50,472	)	$	133		$	(7,341	)	$	(105,677	)

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

(2) Represents amortization of pension liability adjustments, net of taxes of $807 for the twelve weeks ended May 9, 2015 and $630 for the twelve weeks ended May 10, 2014, which is recorded in Operating, selling, general and administrative expenses on the Condensed Consolidated Statements of Income. See “Note G – Pension and Savings Plans” for further discussion.

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

(4) Represents realized (losses) gains on marketable securities, net of taxes of $4 for the twelve weeks ended May 9, 2015 and $19 for the twelve weeks ended May 10, 2014 which is recorded in Operating, selling, general, and administrative expenses on the Condensed Consolidated Statements of Income. See “Note D – Marketable Securities” for further discussion.

(5) Represents gains and losses on derivatives, net of taxes of $15 for the twelve weeks ended May 9, 2015 and $17 for the twelve weeks ended May 10, 2014, which is recorded in Interest expense, net, on the Condensed Consolidated Statements of Income. See “Note E – Derivative Financial Instruments” for further discussion.

11

Changes in Accumulated other comprehensive loss for the thirty-six week periods ended May 9, 2015 and May 10, 2014, consisted of the following:

(in thousands)	Pension Liability			Foreign Currency (3)			Net Unrealized Gain on Securities			Derivatives			Total
Balance at August 30, 2014	$	(63,820	)	$	(57,836	)	$	76		$	(7,323	)	$	(128,903	)
Other comprehensive (loss) income before reclassifications		—			(72,138	)		61			—			(72,077	)
Amounts reclassified from Accumulated other comprehensive loss (1)		3,741	(2)		—			(20	)(4)		77	(5)		3,798
Balance at May 9, 2015	$	(60,079	)	$	(129,974	)	$	117		$	(7,246	)	$	(197,182	)
(in thousands)	Pension Liability			Foreign Currency (3)			Net Unrealized Gain on Securities			Derivatives			Total
Balance at August 31, 2013	$	(50,861	)	$	(62,483	)	$	(25	)	$	(7,419	)	$	(120,788	)
Other comprehensive income before reclassifications		—			12,011			220			—			12,231
Amounts reclassified from Accumulated other comprehensive loss (1)		2,864	(2)		—			(62	)(4)		78	(5)		2,880
Balance at May 10, 2014	$	(47,997	)	$	(50,472	)	$	133		$	(7,341	)	$	(105,677	)

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

(2) Represents amortization of pension liability adjustments, net of taxes of $2,449 in fiscal 2015 and $1,898 in fiscal 2014, which is recorded in Operating, selling, general and administrative expenses on the Condensed Consolidated Statements of Income. See “Note G – Pension and Savings Plans” for further discussion.

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

(4) Represents realized (losses) gains on marketable securities, net of taxes of $11 in fiscal 2015 and $33 in fiscal 2014, which is recorded in Operating, selling, general, and administrative expenses on the Condensed Consolidated Statements of Income. See “Note D – Marketable Securities” for further discussion.

(5) Represents gains and losses on derivatives, net of taxes of $49 in fiscal 2015 and $48 is fiscal 2014, which is recorded in Interest expense, net, on the Condensed Consolidated Statements of Income. See “Note E – Derivative Financial Instruments” for further discussion.

Note K – Acquisition

Effective September 27, 2014, the Company acquired the outstanding stock of Interamerican Motor Corporation (“IMC”), the second largest distributor of quality import replacement parts in the United States, for $75.7 million, net of cash. IMC specializes in parts coverage for European and Asian cars. With this acquisition, the Company expects to grow its share in the aftermarket import car parts market. The results of operations from IMC have been included in the Company’s Auto Parts Locations business activities since the date of acquisition. Pro forma results of operations related to the acquisition of IMC are not presented as IMC’s results are not material to the Company’s condensed consolidated statements of operations. The purchase price allocation resulted in goodwill of $16.8 million and intangible assets totaling $7.7 million. Goodwill generated from the acquisition is primarily attributable to expected synergies and the assembled workforce. The allocation of the purchase price to goodwill and intangible assets is preliminary as of May 9, 2015 and subject to change upon completion of the final valuation of these assets.

Note L – Goodwill and Intangibles

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

(in thousands)	Auto Parts Locations		Other		Total
Net balance as of August 30, 2014	$	302,645	$	65,184	$	367,829
Goodwill adjustments added through acquisition(1)		16,784		—		16,784
Net balance as of May 9, 2015	$	319,429	$	65,184	$	384,613

(1) See Note K for discussion of the acquisition completed during the thirty-six weeks ended May 9, 2015.

12

The Company recorded an increase to intangible assets of $7.7 million during the thirty-six weeks ended May 9, 2015 related to the acquisition of IMC. The carrying amounts of intangible assets are included in Other long-term assets as follows:

(in thousands)	Estimated Useful Life		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Amortizing intangible assets:
Technology		3-5 years	$	10,570	$	(5,071	)	$	5,499
Noncompete agreements		5 years		1,300		(623	)		677
Customer relationships		3-10 years		53,776		(10,472	)		43,304
			$	65,646	$	(16,166	)		49,480
Non-amortizing intangible asset:
Trade name									26,900
Total intangible assets other than goodwill								$	76,380

Amortization expense of intangible assets for the twelve and thirty-six week period ended May 9, 2015 was $2.0 million and $6.2 million, respectively. Amortization expense of intangible assets for the twelve and thirty-six week periods ended May 10, 2014 was $2.0 million and $4.4 million, respectively.

During the thirty-six week period ended May 9, 2015, the Company made an installment payment for $10 million related to certain customer relationships purchased during fiscal 2014 relating to its ALLDATA operations.

Note M – Litigation

In 2004, the Company acquired a store site in Mount Ephraim, New Jersey that had previously been the site of a gasoline service station and contained evidence of groundwater contamination. Upon acquisition, the Company voluntarily reported the groundwater contamination issue to the New Jersey Department of Environmental Protection and entered into a Voluntary Remediation Agreement providing for the remediation of the contamination associated with the property. The Company has conducted and paid for (at an immaterial cost to the Company) remediation of contamination on the property. The Company is also investigating, and will be addressing, potential vapor intrusion impacts in downgradient residences and businesses. The New Jersey Department of Environmental Protection (“NJDEP”) has asserted, in a Directive and Notice to Insurers dated February 19, 2013 and again in an Amended Directive and Notice to Insurers dated January 13, 2014 (collectively the “Directives”), that the Company is liable for the downgradient impacts under a joint and severable liability theory. By letter dated April 23, 2015, NJDEP has demanded payment from the Company, and other parties, in the amount of approximately $296 thousand for costs incurred by NJDEP in connection with contamination downgradient of the property. The Company has contested, and will continue to contest, any such assertions due to the existence of other entities/sources of contamination, some of which are named in the Directives and the April 23, 2015 Demand, 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.

In July 2014, the Company received a subpoena from the District Attorney of the County of Alameda, along with other environmental prosecutorial offices in the state of California, seeking documents and information related to the handling, storage and disposal of hazardous waste. The Company is cooperating fully with the request and cannot predict the ultimate outcome of these efforts.

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.

13

Note N – Segment Reporting

The Company’s four operating segments (Domestic Auto Parts, Mexico, Brazil, and IMC) are aggregated as one reportable segment: Auto Parts Locations. The criteria the Company used to identify the reportable segment are primarily the nature of the products the Company sells and the operating results that are regularly reviewed by the Company’s chief operating decision maker to make decisions about the resources to be allocated to the business units and to assess performance. The accounting policies of the Company’s reportable segment are the same as those described in Note A in its Annual Report on Form 10-K for the year ended August 30, 2014.

The Auto Parts Locations segment is a retailer and distributor of automotive parts and accessories through the Company’s 5,512 locations in the United States, Puerto Rico, Mexico, and Brazil. Each location carries an extensive product line for cars, sport utility vehicles, vans and light trucks, including new and remanufactured automotive hard parts, maintenance items, accessories and non-automotive products.

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

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

	Twelve Weeks Ended						Thirty-Six Weeks Ended
(in thousands)	May 9, 2015			May 10, 2014			May 9, 2015			May 10, 2014
Net Sales
Auto Parts Locations	$	2,404,469		$	2,258,413		$	6,645,712		$	6,191,574
Other		88,552			83,132			251,224			234,043
Total	$	2,493,021		$	2,341,545		$	6,896,936		$	6,425,617
Segment Profit
Auto Parts Locations	$	1,256,753		$	1,171,098		$	3,464,166		$	3,210,084
Other		46,036			45,860			135,317			129,606
Gross profit		1,302,789			1,216,958			3,599,483			3,339,690
Operating, selling, general and administrative expenses		(788,840	)		(738,006	)		(2,315,704	)		(2,139,668	)
Interest expense, net		(31,779	)		(36,162	)		(103,374	)		(118,083	)
Income before income taxes	$	482,170		$	442,790		$	1,180,405		$	1,081,939

14

Report of Independent Registered Public Accounting Firm

The Board of Directors and Stockholders

AutoZone, Inc.

We have reviewed the condensed consolidated balance sheet of AutoZone, Inc. as of May 9, 2015, the related condensed consolidated statements of income for the twelve and thirty-six week periods ended May 9, 2015 and May 10, 2014, the condensed consolidated statements of comprehensive income for the twelve and thirty-six week periods ended May 9, 2015 and May 10, 2014, and the condensed consolidated statements of cash flows for the thirty-six week periods ended May 9, 2015 and May 10, 2014. These financial statements are the responsibility of the Company’s management.

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

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

We have previously audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheet of AutoZone, Inc. as of August 30, 2014, and the related consolidated statements of income, comprehensive income, stockholders’ deficit, and cash flows for the year then ended, not presented herein, and, in our report dated October 27, 2014 we expressed an unqualified opinion on those consolidated financial statements. In our opinion, the information set forth in the accompanying condensed consolidated balance sheet as of August 30, 2014, is fairly stated, in all material respects, in relation to the consolidated balance sheet from which it has been derived.

/s/ Ernst & Young LLP

Memphis, Tennessee

June 17, 2015

15

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

Overview

We are the nation’s leading retailer, and a leading distributor, of automotive replacement parts and accessories in the United States. We began operations in 1979 and at May 9, 2015 operated 5,069 AutoZone stores in the United States, including Puerto Rico; 418 in Mexico; seven in Brazil; and 18 Interamerican Motor Corporation (“IMC”) branches. Each AutoZone 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. At May 9, 2015 in 4,007 of our domestic AutoZone stores, we also have a commercial sales program that provides commercial credit and prompt delivery of parts and other products to local, regional and national repair garages, dealers, service stations and public sector accounts. We have commercial programs in select stores in Mexico and Brazil. IMC branches carry an extensive line of original equipment quality import replacement parts. We also sell the ALLDATA brand automotive diagnostic and repair software through www.alldata.com and www.alldatadiy.com. Additionally, we sell automotive hard parts, maintenance items, accessories, and non-automotive products through www.autozone.com, and accessories and performance parts through www.autoanything.com, and our commercial customers can make purchases through www.autozonepro.com and www.imcparts.net. We do not derive revenue from automotive repair or installation services.

Operating results for the twelve and thirty-six weeks ended May 9, 2015 are not necessarily indicative of the results that may be expected for the fiscal year ending August 29, 2015. Each of the first three quarters of our fiscal year consists of 12 weeks, and the fourth quarter consists of 16 or 17 weeks. The fourth quarters for fiscal 2014 and fiscal 2015 each have 16 weeks. Our business is somewhat seasonal in nature, with the highest sales generally occurring during the months of February through September and the lowest sales generally occurring in the months of December and January.

Executive Summary

Net sales were up 6.5% for the quarter driven by domestic same store sales (sales for stores open at least one year) growth of 2.3%, net sales of $47.9 million from new stores, and the inclusion of IMC sales. Earnings per share increased 13.1% for the quarter.

Our business is impacted by various factors within the economy that affect both our consumer and our industry, including but not limited to fuel costs, unemployment rates, and other economic conditions. Given the nature of these macroeconomic factors, we cannot predict whether or for how long certain trends will continue, nor can we predict to what degree these trends will impact us in the future.

One macroeconomic factor affecting our customers and industry during the third quarter of fiscal 2015 was gas prices. During the quarter, the price per gallon of unleaded gasoline in the United States began the quarter at $2.27 per gallon and ended the quarter at $2.69 per gallon. During the comparable prior year period, gas prices began at $3.38 per gallon and ended at $3.67 per gallon. We believe reduced gas prices gave our customers additional disposable income. 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 affecting us during the third quarter of fiscal 2015 was the timing of processing of income tax refunds. In recent years, we have experienced a significant growth in our sales concurrent with the U.S. tax refund season. We believe that our most economically challenged customers use their refunds to make repairs and enhancements to their vehicles that have been deferred. Each year, the exact timing of tax refunds shifts and those movements occur at the end of our second fiscal quarter or at the beginning of our third fiscal quarter. During fiscal 2015, refunds began earlier, and we believe this negatively impacted our sales during the third quarter.

During the third quarter of fiscal 2015, failure and maintenance related categories represented the largest portion of our sales mix, at approximately 83% of total sales, with failure related categories continuing to be our strongest performers. While we have not experienced any fundamental shifts in our category sales mix as compared to previous years, we did experience a slight increase in mix of sales of the failure related categories. We believe the increase in failure related products is largely due to weather related impacts in various regions of the U.S.

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 2014 and 2015, 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, increasing product availability in our stores, and testing different delivery frequencies from our distribution centers. All of these tests are designed to increase our ability to meet our customers’ needs.

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. 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 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. The average age of the U.S. light vehicle fleet continues to trend in our industry’s favor. We believe that annual miles driven will improve to a low single digit growth rate over time and that the number of seven year old or older vehicles will continue to increase; however, we are unable to predict the impact, if any, these indicators will have on future results.

16

Effective September 27, 2014, we acquired the outstanding stock of IMC, the second largest distributor of quality import replacement parts in the United States, for $75.7 million, net of cash. IMC specializes in parts coverage for European and Asian cars. With this acquisition, we expect to grow our share in the aftermarket import car parts market. The results of operations from IMC have been included in our Auto Parts Locations business activities since the date of acquisition. The purchase price allocation resulted in goodwill of $16.8 million and intangible assets totaling $7.7 million. Goodwill generated from the acquisition is primarily attributable to expected synergies and the assembled workforce. The allocation of the purchase price to goodwill and intangible assets is preliminary as of May 9, 2015 and subject to change upon completion of the final valuation of these assets.

Twelve Weeks Ended May 9, 2015

Compared with Twelve Weeks Ended May 10, 2014

Net sales for the twelve weeks ended May 9, 2015 increased $151.5 million to $2.493 billion, or 6.5%, over net sales of $2.342 billion for the comparable prior year period. Total auto parts sales increased by 6.5%, primarily driven by domestic same store sales, net sales of $47.9 million from new stores, and the inclusion of IMC sales.

Gross profit for the twelve weeks ended May 9, 2015 was $1.303 billion, or 52.3% of net sales, compared with $1.217 billion, or 52.0% of net sales, during the comparable prior year period. The improvement in gross margin was attributable to higher merchandise margins, partially offset by the impact from IMC, which was acquired during September 2014 (-26 basis points).

Operating, selling, general and administrative expenses for the twelve weeks ended May 9, 2015 were $788.8 million, or 31.6% of net sales, compared with $738.0 million, or 31.5% of net sales, during the comparable prior year period. The increase in operating expenses, as a percentage of sales, was primarily due to the impact of the IMC acquisition.

Net interest expense for the twelve weeks ended May 9, 2015 was $31.8 million compared with $36.2 million during the comparable prior year period. The decrease was primarily due to a decrease in borrowing rates, partially offset by an increase in debt over the comparable prior year period. Average borrowings for the twelve weeks ended May 9, 2015 were $4.496 billion, compared with $4.319 billion for the comparable prior year period. Weighted average borrowing rates were 2.9% for the twelve weeks ended May 9, 2015 and 3.4% for the twelve weeks ended May 10, 2014.

Our effective income tax rate was 35.9% of pretax income for the twelve weeks ended May 9, 2015 and 35.6% for the comparable prior year period.

Net income for the twelve week period ended May 9, 2015 increased by $23.9 million to $309.1 million, and diluted earnings per share increased by 13.1% to $9.57 from $8.46 in the comparable prior year period. The impact on current quarter diluted earnings per share from stock repurchases since the end of the comparable prior year period was an increase of $0.36.

Thirty-Six Weeks Ended May 9, 2015

Compared with Thirty-Six Weeks Ended May 10, 2014

Net sales for the thirty-six weeks ended May 9, 2015 increased $471.3 million to $6.897 billion, or 7.3%, over net sales of $6.426 billion for the comparable prior year period. Total auto parts sales increased by 7.3%, primarily driven by domestic same store sales, net sales of $126.1 million from new stores, and the inclusion of IMC sales.

Gross profit for the thirty-six weeks ended May 9, 2015 was $3.599 billion, or 52.2% of net sales, compared with $3.340 billion, or 52.0% of net sales, during the comparable prior year period. The improvement in gross margin was attributable to higher merchandise margins, partially offset by the impact from IMC, which was acquired during September 2014 (-25 basis points).

Operating, selling, general and administrative expenses for the thirty-six weeks ended May 9, 2015 were $2.316 billion, or 33.6% of net sales, compared with $2.140 billion, or 33.3% of net sales, during the comparable prior year period. The increase in operating expenses, as a percentage of sales, was due to the impact of the IMC acquisition and higher incentive compensation.

Net interest expense for the thirty-six weeks ended May 9, 2015 was $103.4 million compared with $118.1 million during the comparable prior year period. The decrease was primarily due to a decrease in borrowing rates, partially offset by an increase in debt over the comparable prior year period. Average borrowings for the thirty-six weeks ended May 9, 2015 were $4.457 billion, compared with $4.243 billion for the comparable prior year period. Weighted average borrowing rates were 3.1% for the thirty-six weeks ended May 9, 2015 and 3.8% for the thirty-six weeks ended May 10, 2014.

Our effective income tax rate was 35.7% of pretax income for both the thirty-six weeks ended May 9, 2015 and the comparable prior year period.

Net income for the thirty-six week period ended May 9, 2015 increased by $63.0 million to $759.1 million, and diluted earnings per share increased by 14.7% to $23.33 from $20.34 in the comparable prior year period. The impact on year to date diluted earnings per share from stock repurchases since the end of the comparable prior year period was an increase of $0.90.

17

Liquidity and Capital Resources

The primary source of our liquidity is our cash flows realized through the sale of automotive parts, products and accessories. For the thirty-six weeks ended May 9, 2015 our net cash flows from operating activities provided $999.1 million as compared with $971.1 million provided during the comparable prior year period. The increase is primarily driven by increased net income, partially offset by timing of tax payments.

Our net cash flows used in investing activities for the thirty-six weeks ended May 9, 2015 was $384.7 million as compared with $275.0 million in the comparable prior year period. Capital expenditures for the thirty-six weeks ended May 9, 2015 were $292.7 million compared to $261.7 million for the comparable prior year period. The increase is primarily driven by new location openings. During the thirty-six week period ended May 9, 2015, we opened 104 net new locations. In the comparable prior year period, we opened 78 net new locations. Cash flows used in the acquisition of IMC were $75.7 million in the thirty-six week period ended May 9, 2015. Cash flows were also used in the purchase of other intangibles for $10 million in the same period. In the comparable prior year period, cash flows were used to purchase intangibles for $11.1 million. Investing cash flows were also impacted by our wholly owned captive, which purchased $26.4 million and sold $23.4 million in marketable securities during the thirty-six weeks ended May 9, 2015. During the comparable prior year period, the captive purchased $28.6 million in marketable securities and sold $25.0 million in marketable securities.

18

Our net cash flows used in financing activities for the thirty-six weeks ended May 9, 2015 was $583.9 million compared to $694.0 million in the comparable prior year period. During the thirty-six weeks ended May 9, 2015, we received $648.8 million from the issuance of debt compared to $400 million in proceeds from the issuance of debt during the comparable prior year period. During the thirty-six weeks ended May 9, 2015, we repaid our $500 million of Senior Notes due in January 2015 using commercial paper borrowings. During the comparable prior year period, we repaid our $500 million of Senior Notes due in January 2014 using proceeds from the $400 million bond issuance in fiscal 2014 and commercial paper borrowings. For the thirty-six weeks ended May 9, 2015, there were $40.7 million net proceeds from commercial paper, as compared to $291.4 million net proceeds from commercial paper in the comparable prior year period. Stock repurchases were $840.9 million in the current thirty-six week period as compared with $911.5 million in the comparable prior year period. For the thirty-six weeks ended May 9, 2015, proceeds from the sale of common stock and exercises of stock options provided $101.7 million, including $44.7 million in related tax benefits. In the comparable prior year period, proceeds from the sale of common stock and exercises of stock options provided $52.7 million, including $18.3 million in related tax benefits.

During fiscal 2015, we expect to invest in our business at an increased rate as compared to fiscal 2014. Our investments are expected to be directed primarily to new locations, enhancements to existing locations, supply chain infrastructure, investments in technology, and the acquisition of IMC. The amount of our investments in our new locations 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. Our mix of 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 location over the previous three years, and we expect this trend to continue during the fiscal year ending August 29, 2015.

In addition to the building and land costs, our new locations require working capital, predominantly for inventories. Historically, we have negotiated extended payment terms from suppliers, reducing the working capital required and resulting in a high accounts payable to inventory ratio. Accounts payable, as a percentage of gross inventory, was 110.9% compared to 114.1% last year. The decrease was driven by a slow-down in inventory turns due to increased inventory as a result of certain strategic initiatives and tests and the inclusion of IMC. We plan to continue leveraging our inventory purchases; however, our ability to do so may be limited by our vendors’ capacity to factor their receivables from us. Certain vendors participate in financing arrangements with financial institutions whereby they factor their receivables from us, allowing them to receive payment on our invoices at a discounted rate.

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

For the trailing four quarters ended May 9, 2015, our after-tax return on invested capital (“ROIC”) was 31.1% as compared to 32.4% for the comparable prior year period. ROIC is calculated as after-tax operating profit (excluding rent charges) divided by average invested capital (which includes a factor to capitalize operating leases). ROIC decreased primarily due to the increase in average debt, which was driven by recent investments in the business. The return on these recent investments is currently diluting our operating margins. 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

On December 19, 2014, we amended and restated our existing revolving credit facility (the “Multi-Year Credit Agreement”) by increasing the amount of capital leases allowable to $225 million, extending the expiration date by two years and renegotiating other terms and conditions. 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 is $1.25 billion and may be increased to $1.5 billion prior to the maturity date at our election and subject to bank credit capacity and approval, may include up to $200 million in letters of credit and may include up to $225 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 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 credit facility. We also have the option to borrow funds under the terms of a swingline loan subfacility. The revolving credit facility expires in December 2019.

19

On December 19, 2014, we entered into a new revolving credit facility (the “364-Day Credit Agreement”). The credit facility is available to primarily support commercial paper borrowings and other short-term unsecured bank loans. The 364-Day Credit Agreement provides for loans in the principal amount of up to $500 million. Under the credit facility, we may borrow funds consisting of Eurodollar loans, base rate loans, or a combination of both. Interest accrues on Eurodollar loans at a defined Eurodollar rate, defined as LIBOR plus the applicable margin, 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 credit facility. This credit facility expires on December 19, 2015, but we may request an extension of the termination date for 364 days no later than 45 days prior to December 19, 2015, subject to bank approval. In addition, we have the right to request a term-loan, at least 15 days prior to December 19, 2015, up to one year from the termination date, subject to a 1% penalty.

As of May 9, 2015, we had no outstanding borrowings under each of the revolving credit facilities and $3.5 million of outstanding letters of credit under the Multi-Year Credit Agreement.

We also maintain a letter of credit facility that allows us to request the participating bank to issue letters of credit on our behalf up to an aggregate amount of $100 million. The letter of credit facility is in addition to the letters of credit that may be issued under the revolving credit facility. As of May 9, 2015, we have $99.8 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 $21.1 million in letters of credit outstanding as of May 9, 2015. These letters of credit have various maturity dates and were issued on an uncommitted basis.

As of May 9, 2015, $934.5 million of commercial paper borrowings and the $300 million 5.500% Senior Notes due November 2015 are classified as long-term in the Consolidated Balance Sheets as we have the ability and intent to refinance on a long-term basis through available capacity in our revolving credit facilities. As of May 9, 2015, we had $1.711 billion of availability under our $1.750 billion revolving credit facilities, which would allow us to replace these short-term obligations with long-term financing.

On April 29, 2015, we issued $400 million in 3.250% Notes due April 2025 and $250 million in 2.500% Notes due April 2021 under our shelf registration statement filed with the SEC on April 15, 2015 (the “New Shelf Registration”). The New 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 location openings, stock repurchases and acquisitions. Proceeds from the debt issuances were used to repay a portion of the outstanding commercial paper borrowings, which were used to repay the $500 million in 5.750% Senior Notes due in January 2015, and for general corporate purposes.

On January 14, 2014, we issued $400 million in 1.300% Senior Notes due January 2017 under its shelf registration statement filed with the SEC on April 17, 2012 (the “Shelf Registration”). Proceeds from the debt issuance on January 14, 2014, were used to repay a portion of the $500 million in 6.500% Senior Notes due January 2014. We used commercial paper borrowings to repay the remainder of the 6.500% Senior Notes.

The 5.750% Senior Notes issued in July 2009 and the 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. Further, all senior notes issued since August 2008 contain a provision that repayment of the notes may be accelerated if we experience a change in control (as defined in the agreements). Our borrowings under our other senior notes contain minimal covenants, primarily restrictions on liens. Under our other borrowing arrangements, covenants include limitations on total indebtedness, restrictions on liens, a minimum fixed charge coverage ratio and a change of control provision that may require acceleration of the repayment obligations under certain circumstances. All of the repayment obligations under our borrowing arrangements may be accelerated and come due prior to the scheduled payment date if covenants are breached or an event of default occurs. As of May 9, 2015, we were in compliance with all covenants and expect to remain in compliance with all covenants.

Our adjusted debt to earnings before interest, taxes, depreciation, amortization, rent and share-based expense (“EBITDAR”) ratio was 2.5:1 as of May 9, 2015, and was 2.5:1 as of May 10, 2014. We calculate adjusted debt as the sum of total debt, capital lease obligations and rent times six; and we calculate EBITDAR by adding interest, taxes, depreciation, amortization, rent and share-based expenses to net income. Adjusted debt to EBITDAR is calculated on a trailing four quarter basis. We target our debt levels to a ratio of adjusted debt to EBITDAR in order to maintain our investment grade credit ratings. We believe this is important information for the management of our debt levels.

20

Stock Repurchases

From January 1, 1998 to May 9, 2015, we have repurchased a total of 138.3 million shares at an aggregate cost of $14.872 billion, including 1,376,933 shares of our common stock at an aggregate cost of $840.9 million during the thirty-six week period ended May 9, 2015. On March 24, 2015, the Board voted to increase the authorization by $750 million to raise the cumulative share repurchase authorization from $14.9 billion to $15.65 billion. Considering cumulative repurchases as of May 9, 2015, we have $778.3 million remaining under the Board’s authorization to repurchase our common stock.

Subsequent to May 9, 2015, we have repurchased 453,006 shares of our common stock at an aggregate cost of $308.5 million.

During the thirty-six week period ended May 9, 2015, we retired 2.1 million shares of treasury stock which had previously been repurchased under our share repurchase program. The retirement increased Retained deficit by $1.050 billion and decreased Additional paid-in capital by $57.4 million. During the comparable prior year period, we retired 3.2 million shares of treasury stock, which increased Retained deficit by $1.220 billion and decreased Additional paid-in capital by $74.0 million.

Off-Balance Sheet Arrangements

Since our fiscal year end, we have cancelled, issued and modified stand-by letters of credit that are primarily renewed on an annual basis to cover deductible payments to our casualty insurance carriers. Our total stand-by letters of credit outstandings at May 9, 2015, was $124.4 million compared with $135.9 million at August 30, 2014, and our total surety bonds outstandings at May 9, 2015, was $31.9 million compared with $28.1 million at August 30, 2014.

Financial Commitments

As of May 9, 2015, there were no significant changes to our contractual obligations as described in our Annual Report on Form 10-K for the year ended August 30, 2014.

Reconciliation of Non-GAAP Financial Measures

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

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

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

The following tables calculate the percentages of ROIC for the trailing four quarters ended May 9, 2015 and May 10, 2014.

	A			B			A-B=C			D			C+D
(in thousands, except percentage)	Fiscal Year Ended August 30, 2014			Thirty-Six Weeks Ended May 10, 2014			Sixteen Weeks Ended August 30, 2014			Thirty-Six Weeks Ended May 9, 2015			Trailing Four Quarters Ended May 9, 2015
Net income	$	1,069,744		$	696,074		$	373,670		$	759,104		$	1,132,774
Adjustments:
Interest expense		167,509			118,083			49,426			103,374			152,800
Rent expense		253,813			174,615			79,198			188,049			267,247
Tax effect (1)		(150,412	)		(104,493	)		(45,919	)		(104,038	)		(149,957	)
After-tax return	$	1,340,654		$	884,279		$	456,375		$	946,489		$	1,402,864
Average debt (2)													$	4,425,186
Average deficit (3)														(1,640,964	)
Rent x 6 (4)														1,603,482
Average capital lease obligations (5)														121,705
Pre-tax invested capital													$	4,509,409
ROIC														31.1	%
	A			B			A-B=C			D			C+D
(in thousands, except percentage)	Fiscal Year Ended August 31, 2013 (6)			Thirty-Six Weeks Ended May 9, 2013			Seventeen Weeks Ended August 31, 2013 (6)			Thirty-Six Weeks Ended May 10, 2014			Trailing Four Quarters Ended May 10, 2014 (6)
Net income	$	1,016,480		$	645,281		$	371,199		$	696,074		$	1,067,273
Adjustments:
Interest expense		185,415			124,519			60,896			118,083			178,979
Rent expense		246,340			166,349			79,991			174,615			254,606
Tax effect (1)		(153,705	)		(103,549	)		(50,156	)		(104,200	)		(154,356	)
After-tax return	$	1,294,530		$	832,600		$	461,930		$	884,572		$	1,346,502
Average debt (2)													$	4,212,337
Average deficit (3)														(1,691,875	)
Rent x 6 (4)														1,527,636
Average capital lease obligations (5)														105,496
Pre-tax invested capital													$	4,153,594
ROIC														32.4	%

(1) The effective tax rate was 35.7% and 35.6% over the trailing four quarters ended May 9, 2015 and May 10, 2014 respectively.

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

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

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

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

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

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

The following tables calculate the ratio of adjusted debt to EBITDAR for the trailing four quarters ended May 9, 2015 and May 10, 2014.

	A		B		A-B=C		D		C+D
(in thousands, except ratio)	Fiscal Year Ended August 30, 2014		Thirty-Six Weeks Ended May 10, 2014		Sixteen Weeks Ended August 30, 2014		Thirty-Six Weeks Ended May 9, 2015		Trailing Four Quarters Ended May 9, 2015
Net income	$	1,069,744	$	696,074	$	373,670	$	759,104	$	1,132,774
Add: Interest expense		167,509		118,083		49,426		103,374		152,800
Income tax expense		592,970		385,865		207,105		421,301		628,406
EBIT		1,830,223		1,200,022		630,201		1,283,779		1,913,980
Add: Depreciation expense		251,267		172,286		78,981		183,211		262,192
Rent expense		253,813		174,615		79,198		188,049		267,247
Share-based expense		39,390		28,985		10,405		29,688		40,093
EBITDAR	$	2,374,693	$	1,575,908	$	798,785	$	1,684,727	$	2,483,512
Debt									$	4,533,329
Capital lease obligations										132,016
Add: Rent x 6 (1)										1,603,482
Adjusted debt									$	6,268,827
Adjusted debt / EBITDAR										2.5
	A		B		A-B=C		D		C+D
(in thousands, except ratio)	Fiscal Year Ended August 31, 2013 (2)		Thirty-Six Weeks Ended May 4, 2013		Seventeen Weeks Ended August 31, 2013 (2)		Thirty-Six Weeks Ended May 10, 2014		Trailing Four Quarters Ended May 10, 2014 (2)
Net income	$	1,016,480	$	645,281	$	371,199	$	696,074	$	1,067,273
Add: Interest expense		185,415		124,519		60,896		118,083		178,979
Income tax expense		571,203		367,078		204,125		385,865		589,990
EBIT		1,773,098		1,136,878		636,220		1,200,022		1,836,242
Add: Depreciation expense		227,251		155,932		71,319		172,286		243,605
Rent expense		246,340		166,349		79,991		174,615		254,606
Share-based expense		37,307		25,632		11,675		28,985		40,660
EBITDAR	$	2,283,996	$	1,484,791	$	799,205	$	1,575,908	$	2,375,113
Debt									$	4,378,400
Capital lease obligations										106,214
Add: Rent x 6 (1)										1,527,636
Adjusted debt									$	6,012,250
Adjusted debt / EBITDAR										2.5

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

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

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Recent Accounting Pronouncements:

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

Critical Accounting Policies

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

Our critical accounting policies are described in Management’s Discussion and Analysis of Financial Condition and Results of Operations in our Annual Report on Form 10-K for the year ended August 30, 2014. Our critical accounting policies have not changed since the filing of our Annual Report on Form 10-K for the year ended August 30, 2014.

Forward-Looking Statements

Certain statements contained in this Quarterly Report on Form 10-Q are forward-looking statements. Forward-looking statements typically use words such as “believe,” “anticipate,” “should,” “intend,” “plan,” “will,” “expect,” “estimate,” “project,” “positioned,” “strategy” and similar expressions. These are based on assumptions and assessments made by our management in light of experience and perception of historical trends, current conditions, expected future developments and other factors that we believe to be appropriate. These forward-looking statements are subject to a number of risks and uncertainties, including without limitation: credit market conditions; the impact of recessionary conditions; competition; product demand; the ability to hire and retain qualified employees; consumer debt levels; inflation; weather; raw material costs of our suppliers; energy prices; war and the prospect of war, including terrorist activity; construction delays; access to available and feasible financing; and changes in laws or regulations. Certain of these risks are discussed in more detail in the “Risk Factors” section contained in Item 1A under Part 1 of our Annual Report on Form 10-K for the year ended August 30, 2014, and these Risk Factors should be read carefully. Forward-looking statements are not guarantees of future performance and actual results; developments and business decisions may differ from those contemplated by such forward-looking statements, and events described above and in the “Risk Factors” could materially and adversely affect our business. Forward-looking statements speak only as of the date made. Except as required by applicable law, we undertake no obligation to update publicly any forward-looking statements, whether as a result of new information, future events or otherwise. Actual results may materially differ from anticipated results.

Item 3. Quantitative and Qualitative Disclosures about Market Risk.

At May 9, 2015, the only material changes to our instruments and positions that are sensitive to market risk since the disclosures in our 2014 Annual Report to Stockholders were the $40.7 million net increase in commercial paper.

The fair value of our debt was estimated at $4.635 billion as of May 9, 2015, and $4.480 billion as of August 30, 2014, based on the quoted market prices for the same or similar debt issues or on the current rates available to AutoZone for debt of the same terms. Such fair value is greater than the carrying value of debt by $101.2 million at May 9, 2015 and $136.6 million at August 30, 2014. We had $934.5 million of variable rate debt outstanding at May 9, 2015, and $893.8 million of variable rate debt outstanding at August 30, 2014. At these borrowing levels for variable rate debt, a one percentage point increase in interest rates would have had an unfavorable annual impact on our pre-tax earnings and cash flows of $9.3 million in fiscal 2015. The primary interest rate exposure on variable rate debt is based on LIBOR. We had outstanding fixed rate debt of $3.599 billion at May 9, 2015 and $3.450 billion at August 30, 2014. A one percentage point increase in interest rates would reduce the fair value of our fixed rate debt by $171.3 million at May 9, 2015.

Item 4. Controls and Procedures.

As of May 9, 2015, an evaluation was performed under the supervision and with the participation of our management, including the Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, as amended. Based on that evaluation, our management, including the Chief Executive Officer and Chief Financial Officer, concluded that our disclosure controls and procedures were effective as of May 9, 2015. During or subsequent to the quarter ended May 9, 2015, there were no changes in our internal controls that have materially affected or are reasonably likely to materially affect, internal controls over financial reporting.

Item 4T. Controls and Procedures.

Not applicable.

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PART II. OTHER INFORMATION

Item 1. Legal Proceedings.

In 2004, we acquired a store site in Mount Ephraim, New Jersey that had previously been the site of a gasoline service station and contained evidence of groundwater contamination. Upon acquisition, we voluntarily reported the groundwater contamination issue to the New Jersey Department of Environmental Protection and entered into a Voluntary Remediation Agreement providing for the remediation of the contamination associated with the property. We have conducted and paid for (at an immaterial cost to us) remediation of contamination on the property. We are also investigating, and will be addressing, potential vapor intrusion impacts in downgradient residences and businesses. The New Jersey Department of Environmental Protection (“NJDEP”) has asserted, in a Directive and Notice to Insurers dated February 19, 2013 and again in an Amended Directive and Notice to Insurers dated January 13, 2014 (collectively the “Directives”), that we are liable for the downgradient impacts under a joint and severable liability theory. By letter dated April 23, 2015, NJDEP has demanded payment from us, and other parties, in the amount of approximately $296 thousand for costs incurred by NJDEP in connection with contamination downgradient of the property. We have contested, and will continue to contest, any such assertions due to the existence of other entities/sources of contamination, some of which are named in the Directives and the April 23, 2015 Demand, in the area of the property. Pursuant to the Voluntary Remediation Agreement, upon completion of all remediation required by the agreement, we believe it should be 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 its obligations under the agreement or otherwise will result in costs that are material to its financial condition, results of operations or cash flow.

In July 2014, we received a subpoena from the District Attorney of the County of Alameda, along with other environmental prosecutorial offices in the state of California, seeking documents and information related to the handling, storage and disposal of hazardous waste. We are cooperating fully with the request and cannot predict the ultimate outcome of these efforts.

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

Item 1A. Risk Factors.

As of the date of this filing, there have been no material changes in our risk factors from those disclosed in Part I, Item 1A, of our Annual Report on Form 10-K for the fiscal year ended August 30, 2014.

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

Shares of common stock repurchased by the Company during the quarter ended May 9, 2015, were as follows:

Issuer Repurchases of Equity Securities

Period	Total Number of Shares Purchased		Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs		Maximum Dollar Value that May Yet Be Purchased Under the Plans or Programs
February 15, 2015 to March 14, 2015		173,971	$	643.80		173,971	$	431,561,343
March 15, 2015 to April 11, 2015		299,144		675.62		299,144		979,454,739
April 12, 2015 to May 9, 2015		289,719		694.27		289,719		778,312,095
Total		762,834	$	675.44		762,834	$	778,312,095

During 1998, we announced a program permitting us to repurchase a portion of our outstanding shares not to exceed a dollar maximum established by our Board of Directors. This program was most recently amended on March 24, 2015 to increase the repurchase authorization to $15.65 billion from $14.9 billion and does not have an expiration date. All of the above repurchases were part of this program. Subsequent to May 9, 2015, we have repurchased 453,006 shares of our common stock at an aggregate cost of $308.5 million.

Item 3. Defaults Upon Senior Securities.

Not applicable.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information.

Not applicable.

25

Item 6. Exhibits.

The following exhibits are filed as part of this report:

3.1	Restated Articles of Incorporation of AutoZone, Inc. incorporated by reference to Exhibit 3.1 to the Quarterly Report on Form 10-Q for the quarter ended February 13, 1999.
3.2	Fifth Amended and Restated By-laws of AutoZone, Inc. incorporated by reference to Exhibit 3.1 to the Current Report on Form 8-K dated September 28, 2011.
4.1	Officers’ Certificate dated April 29, 2015, pursuant to Section 3.2 of the Indenture dated August 8, 2003, setting forth the terms of the 2.500% Senior Notes due 2021. Incorporated by reference to Exhibit 4.1 to the Current Report on Form 8-K dated April 29, 2015.
4.2	Form of 2.500% Note due 2021. Incorporated by reference to Exhibit 4.3 to the Current Report on Form 8-K dated April 29, 2015.
4.3	Officers’ Certificate dated April 29, 2015, pursuant to Section 3.2 of the Indenture dated August 8, 2003, setting forth the terms of the 3.250% Senior Notes due 2025. Incorporated by reference to Exhibit 4.2 to the Current Report on Form 8-K dated April 29, 2015.
4.4	Form of 3.250% Note due 2025. Incorporated by reference to Exhibit 4.4 to the Current Report on Form 8-K dated April 29, 2015.
12.1	Computation of Ratio of Earnings to Fixed Charges.
15.1	Letter Regarding Unaudited Interim Financial Statements.
31.1	Certification of Principal Executive Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of Principal Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1	Certification of Principal Executive Officer Pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2	Certification of Principal Financial Officer Pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101. INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Document
101.LAB	XBRL Taxonomy Extension Labels Document
101.PRE	XBRL Taxonomy Extension Presentation Document
101.DEF	XBRL Taxonomy Extension Definition Document

26

SIGNATURES

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

AUTOZONE, INC.
By:	/s/ WILLIAM T. GILES
	William T. Giles
	Chief Financial Officer and Executive Vice President Finance, Information Technology and ALLDATA
	(Principal Financial Officer)
By:	/s/ CHARLIE PLEAS, III
	Charlie Pleas, III
	Senior Vice President, Controller
	(Principal Accounting Officer)

Dated: June 17, 2015

27

EXHIBIT INDEX

The following exhibits are filed as part of this report:

3.1	Restated Articles of Incorporation of AutoZone, Inc. incorporated by reference to Exhibit 3.1 to the Quarterly Report on Form 10-Q for the quarter ended February 13, 1999.
3.2	Fifth Amended and Restated By-laws of AutoZone, Inc. incorporated by reference to Exhibit 3.1 to the Current Report on Form 8-K dated September 28, 2011.
4.1	Officers’ Certificate dated April 29, 2015, pursuant to Section 3.2 of the Indenture dated August 8, 2003, setting forth the terms of the 2.500% Senior Notes due 2021. Incorporated by reference to Exhibit 4.1 to the Current Report on Form 8-K dated April 29, 2015.
4.2	Form of 2.500% Note due 2021. Incorporated by reference to Exhibit 4.3 to the Current Report on Form 8-K dated April 29, 2015.
4.3	Officers’ Certificate dated April 29, 2015, pursuant to Section 3.2 of the Indenture dated August 8, 2003, setting forth the terms of the 3.250% Senior Notes due 2025. Incorporated by reference to Exhibit 4.2 to the Current Report on Form 8-K dated April 29, 2015.
4.4	Form of 3.250% Note due 2025. Incorporated by reference to Exhibit 4.4 to the Current Report on Form 8-K dated April 29, 2015.
12.1	Computation of Ratio of Earnings to Fixed Charges.
15.1	Letter Regarding Unaudited Interim Financial Statements.
31.1	Certification of Principal Executive Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of Principal Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1	Certification of Principal Executive Officer Pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2	Certification of Principal Financial Officer Pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Document
101.LAB	XBRL Taxonomy Extension Labels Document
101.PRE	XBRL Taxonomy Extension Presentation Document
101.DEF	XBRL Taxonomy Extension Definition Document

28

EX-12.1

Exhibit 12.1

Computation of Ratio of Earnings to Fixed Charges

(Unaudited)

(in thousands, except ratios)

	Thirty-Six Weeks Ended
	May 9, 2015			May 10, 2014
Earnings:
Income before income taxes	$	1,180,405		$	1,081,939
Fixed charges		163,625			174,597
Less: Capitalized interest		(580	)		(670	)
Adjusted earnings	$	1,343,450		$	1,255,866
Fixed charges:
Gross interest expense	$	100,737		$	115,275
Amortization of debt origination fees		4,274			4,895
Interest portion of rent expense		58,614			54,427
Fixed charges	$	163,625		$	174,597
Ratio of earnings to fixed charges		8.2			7.2

	Fiscal Year Ended August
	2014 (52 weeks)			2013 (53 weeks)			2012 (52 weeks)			2011 (52 weeks)			2010 (52 weeks)
Earnings:
Income before income taxes	$	1,662,714		$	1,587,683		$	1,452,986		$	1,324,246		$	1,160,505
Fixed charges		249,513			265,108			250,056			240,329			223,608
Less: Capitalized interest		(1,041	)		(1,303	)		(1,245	)		(1,059	)		(1,093	)
Adjusted earnings	$	1,911,186		$	1,851,488		$	1,701,797		$	1,563,516		$	1,383,020
Fixed charges:
Gross interest expense	$	163,544		$	180,085		$	170,481		$	164,712		$	156,135
Amortization of debt origination fees		6,856			8,239			8,066			8,962			6,495
Interest portion of rent expense		79,113			76,784			71,509			66,655			60,978
Fixed charges	$	249,513		$	265,108		$	250,056		$	240,329		$	223,608
Ratio of earnings to fixed charges		7.7			7.0			6.8			6.5			6.2

EX-15.1

Exhibit 15.1

The Board of Directors and Stockholders

AutoZone, Inc.

We are aware of the incorporation by reference in the following Registration Statements of AutoZone, Inc. and in the related Prospectuses of our report dated June 17, 2015 related to the unaudited condensed consolidated financial statements of AutoZone, Inc. that are included in its Quarterly Report on Form 10-Q for the quarter ended May 9, 2015:

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

Registration Statement (Form S-3 No. 333-203439) pertaining to a shelf registration to sell debt securities

/s/ Ernst & Young LLP

Memphis, Tennessee

June 17, 2015

EX-31.1

Exhibit 31.1

CERTIFICATION PURSUANT TO

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

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

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

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

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

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

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

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

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

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

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

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

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

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

June 17, 2015

/s/ WILLIAM C. RHODES, III

William C. Rhodes, III

Chairman, President and Chief Executive Officer

(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION PURSUANT TO

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

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

I, William T. Giles, certify that:

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

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

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

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

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

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

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

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

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

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

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

June 17, 2015

/s/ WILLIAM T. GILES

William T. Giles

Chief Financial Officer and Executive Vice President

Finance, Information Technology and ALLDATA

(Principal Financial Officer)

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

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

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of AutoZone, Inc. (the “Company”) on Form 10-Q for the period ended May 9, 2015, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, William C. Rhodes, III, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

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

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

June 17, 2015

/s/ WILLIAM C. RHODES, III

William C. Rhodes, III

Chairman, President and Chief Executive Officer

(Principal Executive Officer)

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

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

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of AutoZone, Inc. (the “Company”) on Form 10-Q for the period ended May 9, 2015, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, William T. Giles, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

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

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

June 17, 2015

/s/ WILLIAM T. GILES

William T. Giles

Chief Financial Officer and Executive Vice President

Finance, Information Technology and ALLDATA

(Principal Financial Officer)

XML

Merchandise Inventories - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	May 09, 2015	Aug. 30, 2014
Inventory Disclosure [Abstract]
Unrecorded adjustment for LIFO value in excess of replacement value	$ 323.8	$ 307.2

XML

Segment Reporting - Segment Results (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	May 09, 2015	May 10, 2014	May 09, 2015	May 10, 2014
Segment Reporting Information [Line Items]
Net sales	$ 2,493,021	$ 2,341,545	$ 6,896,936	$ 6,425,617
Gross profit	1,302,789	1,216,958	3,599,483	3,339,690
Operating, selling, general and administrative expenses	(788,840)	(738,006)	(2,315,704)	(2,139,668)
Interest expense, net	(31,779)	(36,162)	(103,374)	(118,083)
Income before income taxes	482,170	442,790	1,180,405	1,081,939
Auto Parts Locations [Member]
Segment Reporting Information [Line Items]
Net sales	2,404,469	2,258,413	6,645,712	6,191,574
Gross profit	1,256,753	1,171,098	3,464,166	3,210,084
Other [Member]
Segment Reporting Information [Line Items]
Net sales	88,552	83,132	251,224	234,043
Gross profit	$ 46,036	$ 45,860	$ 135,317	$ 129,606

XML

Acquisition - Additional Information (Detail) (USD $)	0 Months Ended
	Sep. 27, 2014	May 09, 2015	Aug. 30, 2014
Business Acquisition [Line Items]
Goodwill		$ 384,613,000	$ 367,829,000
Interamerican Motor Corporation [Member]
Business Acquisition [Line Items]
Acquisition of outstanding stock	75,700,000
Goodwill	16,800,000
Purchase price allocation, intangible assets	$ 7,700,000

XML

Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	May 09, 2015	May 10, 2014	May 09, 2015	May 10, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (185,586)	$ (120,346)	$ (128,903)	$ (120,788)
Other comprehensive (loss) income before reclassifications	(12,887)	13,723	(72,077)	12,231
Amounts reclassified from Accumulated other comprehensive loss	1,291	946	3,798	2,880
Ending Balance	(197,182)	(105,677)	(197,182)	(105,677)
Pension Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(61,335)	(48,954)	(63,820)	(50,861)
Amounts reclassified from Accumulated other comprehensive loss	1,256	957	3,741	2,864
Ending Balance	(60,079)	(47,997)	(60,079)	(47,997)
Foreign Currency [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(116,689)	(64,172)	(57,836)	(62,483)
Other comprehensive (loss) income before reclassifications	(13,285)	13,700	(72,138)	12,011
Ending Balance	(129,974)	(50,472)	(129,974)	(50,472)
Net Unrealized Gain on Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(12)	146	76	(25)
Other comprehensive (loss) income before reclassifications	121	23	61	220
Amounts reclassified from Accumulated other comprehensive loss	8	(36)	(20)	(62)
Ending Balance	117	133	117	133
Derivatives [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(7,550)	(7,366)	(7,323)	(7,419)
Other comprehensive (loss) income before reclassifications	277
Amounts reclassified from Accumulated other comprehensive loss	27	25	77	78
Ending Balance	$ (7,246)	$ (7,341)	$ (7,246)	$ (7,341)

XML

Share-Based Payments - Weighted Average for Key Assumptions Used in Determining Fair Value of Options Granted and Related Share-Based Compensation Expense (Detail)	9 Months Ended
	May 09, 2015	May 10, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Expected price volatility	20.00%	23.00%
Risk-free interest rate	1.40%	1.00%
Weighted average expected lives (in years)	5 years 1 month 6 days	5 years 2 months 12 days
Forfeiture rate	9.00%	9.00%
Dividend yield	0.00%	0.00%

XML

Marketable Securities (Tables)

9 Months Ended

May 09, 2015

Investments, Debt and Equity Securities [Abstract]

Available-for-Sale Marketable Securities

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

	May 9, 2015
(in thousands)	Amortized Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate securities	$	35,226	$	159	$	(4	)	$	35,381
Government bonds		27,254		61		—			27,315
Mortgage-backed securities		10,103		26		(82	)		10,047
Asset-backed securities and other		15,643		21		—			15,664
	$	88,226	$	267	$	(86	)	$	88,407

	August 30, 2014
(in thousands)	Amortized Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate securities	$	37,265	$	137	$	(15	)	$	37,387
Government bonds		16,822		16		(1	)		16,837
Mortgage-backed securities		8,791		22		(77	)		8,736
Asset-backed securities and other		22,260		35		—			22,295
	$	85,138	$	210	$	(93	)	$	85,255

XML

Goodwill and Intangibles - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	May 09, 2015	May 10, 2014	May 09, 2015	May 10, 2014
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	$ 2,000,000	$ 2,000,000	$ 6,200,000	$ 4,400,000
Purchase of intangibles			10,000,000	11,112,000
Interamerican Motor Corporation [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Increased intangible assets related to acquisition			7,700,000
Customer Relationships [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Purchase of intangibles			$ 10,000,000

XML

Financing - Schedule of Debt (Detail) (USD $) In Thousands, unless otherwise specified	May 09, 2015	Aug. 30, 2014
Debt Instrument [Line Items]
Commercial paper	$ 934,500	$ 893,800
Total debt	4,533,329	4,343,800
Total debt	4,533,329	4,343,800
Less: Short-term borrowings		180,910
Long-term debt	4,533,329	4,162,890
5.750% Senior Notes due January 2015, effective interest rate of 5.89% [Member]
Debt Instrument [Line Items]
Total debt		500,000
5.500% Senior Notes due November 2015, effective interest rate of 4.86% [Member]
Debt Instrument [Line Items]
Total debt	300,000	300,000
6.950% Senior Notes due June 2016, effective interest rate of 7.09% [Member]
Debt Instrument [Line Items]
Total debt	200,000	200,000
1.300% Senior Notes due January 2017, effective interest rate 1.43% [Member]
Debt Instrument [Line Items]
Total debt	400,000	400,000
7.125% Senior Notes due August 2018, effective interest rate of 7.28% [Member]
Debt Instrument [Line Items]
Total debt	250,000	250,000
4.000% Senior Notes due November 2020, effective interest rate of 4.43% [Member]
Debt Instrument [Line Items]
Total debt	500,000	500,000
2.500% Senior Notes due April 2021, effective interest rate of 2.62% [Member]
Debt Instrument [Line Items]
Total debt	249,905
3.700% Senior Notes due April 2022, effective interest rate of 3.85% [Member]
Debt Instrument [Line Items]
Total debt	500,000	500,000
2.875% Senior Notes due January 2023, effective interest rate of 3.21% [Member]
Debt Instrument [Line Items]
Total debt	300,000	300,000
3.125% Senior Notes due July 2023, effective interest rate of 3.26% [Member]
Debt Instrument [Line Items]
Total debt	500,000	500,000
3.250% Senior Notes due April 2025, effective interest rate of 3.36% [Member]
Debt Instrument [Line Items]
Total debt	$ 398,924

XML

Marketable Securities - Additional Information (Detail) (USD $)	0 Months Ended
	May 09, 2015	May 09, 2015 Securities	Aug. 30, 2014
Investments, Debt and Equity Securities [Abstract]
Available for sale securities debt maturity period range	Less than one year to approximately three years
Number of securities available for sale loss position		19
Available-For-Sale Marketable Securities, Gross Unrealized Losses		$ 86,000	$ 93,000
Marketable securities transferred	$ 45,500,000

XML

Litigation - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	May 09, 2015
Loss Contingencies [Line Items]
Site contingency, recovery from third party of environmental remediation cost	In 2004, the Company acquired a store site in Mount Ephraim, New Jersey that had previously been the site of a gasoline service station and contained evidence of groundwater contamination. Upon acquisition, the Company voluntarily reported the groundwater contamination issue to the New Jersey Department of Environmental Protection and entered into a Voluntary Remediation Agreement providing for the remediation of the contamination associated with the property. The Company has conducted and paid for (at an immaterial cost to the Company) remediation of 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 (“NJDEP”) has asserted, in a Directive and Notice to Insurers dated February 19, 2013 and again in an Amended Directive and Notice to Insurers dated January 13, 2014 (collectively the “Directives”), that the Company is liable for the downgradient impacts under a joint and severable liability theory. By letter dated April 23, 2015, NJDEP has demanded payment from the Company, and other parties, in the amount of approximately $296 thousand for costs incurred by NJDEP in connection with contamination downgradient of the property. The Company has contested, and will continue to contest, any such assertions due to the existence of other entities/sources of contamination, some of which are named in the Directives and the April 23, 2015 Demand, 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.
Received a subpoena from the District Attorney of the County of Alameda and other legal proceedings	In July 2014, the Company received a subpoena from the District Attorney of the County of Alameda, along with other environmental prosecutorial offices in the state of California, seeking documents and information related to the handling, storage and disposal of hazardous waste. The Company is cooperating fully with the request and cannot predict the ultimate outcome of these efforts.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.
New Jersey Department of Environmental Protection [Member]
Loss Contingencies [Line Items]
Litigation settlement amount demanded by plaintiff	296
Maximum [Member]
Loss Contingencies [Line Items]
Reimbursable remediation costs	75.00%

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Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	May 09, 2015	May 10, 2014	May 09, 2015	May 10, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from accumulated other comprehensive income, pension, taxes	$ 807	$ 630	$ 2,449	$ 1,898
Reclassification from accumulated other comprehensive income, securities, taxes	69	7	22	85
Reclassification from accumulated other comprehensive income, derivatives, taxes	264	17	49	48
Pension Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from accumulated other comprehensive income, pension, taxes	807	630	2,449	1,898
Net Unrealized Gain on Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from accumulated other comprehensive income, securities, taxes	4	19	11	33
Derivatives [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from accumulated other comprehensive income, derivatives, taxes	$ 15	$ 17	$ 49	$ 48

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Share-Based Payments

9 Months Ended

May 09, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-Based Payments

Note B – Share-Based Payments

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

Total share-based compensation expense (a component of Operating, selling, general and administrative expenses) was $9.5 million for the twelve week period ended May 9, 2015, and was $8.3 million for the comparable prior year period. Share-based compensation expense was $29.7 million for the thirty-six week period ended May 9, 2015, and was $29.0 million for the comparable prior year period.

During the thirty-six week period ended May 9, 2015, 311,285 shares of stock options were exercised at a weighted average exercise price of $186.40. In the comparable prior year period, 194,130 shares of stock options were exercised at a weighted average exercise price of $177.95.

The Company made stock option grants of 329,700 shares during the thirty-six week period ended May 9, 2015, and granted options to purchase 347,615 shares during the comparable prior year period. The weighted average fair value of the stock option awards granted during the thirty-six week periods ended May 9, 2015, and May 10, 2014, using the Black-Scholes-Merton multiple-option pricing valuation model, was $106.26 and $96.92 per share, respectively, using the following weighted average key assumptions:

	Thirty-Six Weeks Ended
	May 9, 2015			May 10, 2014
Expected price volatility		20	%		23	%
Risk-free interest rate		1.4	%		1.0	%
Weighted average expected lives (in years)		5.1			5.2
Forfeiture rate		9	%		9	%
Dividend yield		0	%		0	%

See AutoZone’s Annual Report on Form 10-K for the year ended August 30, 2014, for a discussion regarding the methodology used in developing AutoZone’s assumptions to determine the fair value of the option awards and a description of AutoZone’s 2011 Equity Incentive Award Plan, the 2011 Director Compensation Program, and the 2014 Director Compensation Plan.

For the twelve week period ended May 9, 2015, 1,140 stock options were excluded from the diluted earnings per share computation because they would have been anti-dilutive. For the comparable prior year period, no stock options shares were excluded from the dilutive earnings per share computation. There were 2,240 anti-dilutive shares excluded from the diluted earnings per share computation for the thirty-six week period ended May 9, 2015, and no stock options were excluded for the comparable prior year period.

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Financing - Schedule of Debt (Parenthetical) (Detail)	3 Months Ended	9 Months Ended	12 Months Ended
	May 09, 2015	May 09, 2015	Aug. 30, 2014
5.750% Senior Notes due January 2015, effective interest rate of 5.89% [Member]
Debt Instrument [Line Items]
Stated interest rate percentage	5.75%	5.75%	5.75%
Effective interest rate	5.89%	5.89%	5.89%
Debt instrument maturity, month and year	2015-01	2015-01	2015-01
5.500% Senior Notes due November 2015, effective interest rate of 4.86% [Member]
Debt Instrument [Line Items]
Stated interest rate percentage	5.50%	5.50%	5.50%
Effective interest rate	4.86%	4.86%	4.86%
Debt instrument maturity, month and year	2015-11		2015-11
6.950% Senior Notes due June 2016, effective interest rate of 7.09% [Member]
Debt Instrument [Line Items]
Stated interest rate percentage	6.95%	6.95%	6.95%
Effective interest rate	7.09%	7.09%	7.09%
Debt instrument maturity, month and year	2016-06		2016-06
1.300% Senior Notes due January 2017, effective interest rate 1.43% [Member]
Debt Instrument [Line Items]
Stated interest rate percentage	1.30%	1.30%	1.30%
Effective interest rate	1.43%	1.43%	1.43%
Debt instrument maturity, month and year	2017-01		2017-01
7.125% Senior Notes due August 2018, effective interest rate of 7.28% [Member]
Debt Instrument [Line Items]
Stated interest rate percentage	7.125%	7.125%	7.125%
Effective interest rate	7.28%	7.28%	7.28%
Debt instrument maturity, month and year	2018-08		2018-08
4.000% Senior Notes due November 2020, effective interest rate of 4.43% [Member]
Debt Instrument [Line Items]
Stated interest rate percentage	4.00%	4.00%	4.00%
Effective interest rate	4.43%	4.43%	4.43%
Debt instrument maturity, month and year	2020-11		2020-11
2.500% Senior Notes due April 2021, effective interest rate of 2.62% [Member]
Debt Instrument [Line Items]
Stated interest rate percentage	2.50%	2.50%
Effective interest rate	2.62%	2.62%
Debt instrument maturity, month and year	2021-04
3.700% Senior Notes due April 2022, effective interest rate of 3.85% [Member]
Debt Instrument [Line Items]
Stated interest rate percentage	3.70%	3.70%	3.70%
Effective interest rate	3.85%	3.85%	3.85%
Debt instrument maturity, month and year	2022-04		2022-04
2.875% Senior Notes due January 2023, effective interest rate of 3.21% [Member]
Debt Instrument [Line Items]
Stated interest rate percentage	2.875%	2.875%	2.875%
Effective interest rate	3.21%	3.21%	3.21%
Debt instrument maturity, month and year	2023-01		2023-01
3.125% Senior Notes due July 2023, effective interest rate of 3.26% [Member]
Debt Instrument [Line Items]
Stated interest rate percentage	3.125%	3.125%	3.125%
Effective interest rate	3.26%	3.26%	3.26%
Debt instrument maturity, month and year	2023-07		2023-07
3.250% Senior Notes due April 2025, effective interest rate of 3.36% [Member]
Debt Instrument [Line Items]
Stated interest rate percentage	3.25%	3.25%
Effective interest rate	3.36%	3.36%
Debt instrument maturity, month and year	2025-04
Commercial paper, weighted average interest rate of 0.45% and 0.27% at May 9, 2015 and August 30, 2014, respectively [Member]
Debt Instrument [Line Items]
Weighted average interest rate of commercial paper	0.45%	0.45%	0.27%

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Goodwill and Intangibles (Tables)

9 Months Ended

May 09, 2015

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 Locations		Other		Total
Net balance as of August 30, 2014	$	302,645	$	65,184	$	367,829
Goodwill adjustments added through acquisition(1)		16,784		—		16,784
Net balance as of May 9, 2015	$	319,429	$	65,184	$	384,613

(1) See Note K for discussion of the acquisition completed during the thirty-six weeks ended May 9, 2015

Schedule of Carrying Amounts of Intangible Assets

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

(in thousands)	Estimated Useful Life		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Amortizing intangible assets:
Technology		3-5 years	$	10,570	$	(5,071	)	$	5,499
Noncompete agreements		5 years		1,300		(623	)		677
Customer relationships		3-10 years		53,776		(10,472	)		43,304
			$	65,646	$	(16,166	)		49,480
Non-amortizing intangible asset:
Trade name									26,900
Total intangible assets other than goodwill								$	76,380

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Accumulated Other Comprehensive Loss (Tables)

9 Months Ended

May 09, 2015

Equity [Abstract]

Changes in Accumulated Other Comprehensive Loss

Changes in Accumulated other comprehensive loss for the twelve week periods ended May 9, 2015 and May 10, 2014 consisted of the following:

(in thousands)	Pension Liability			Foreign Currency (3)			Net Unrealized Gain on Securities			Derivatives			Total
Balance at February 14, 2015	$	(61,335	)	$	(116,689	)	$	(12	)	$	(7,550	)	$	(185,586	)
Other comprehensive (loss) income before reclassifications		—			(13,285	)		121			277			(12,887	)
Amounts reclassified from Accumulated other comprehensive loss (1)		1,256	(2)		—			8	(4)		27	(5)		1,291
Balance at May 9, 2015	$	(60,079	)	$	(129,974	)	$	117		$	(7,246	)	$	(197,182	)
(in thousands)	Pension Liability			Foreign Currency (3)			Net Unrealized Gain on Securities			Derivatives			Total
Balance at February 15, 2014	$	(48,954	)	$	(64,172	)	$	146		$	(7,366	)	$	(120,346	)
Other comprehensive income before reclassifications		—			13,700			23			—			13,723
Amounts reclassified from Accumulated other comprehensive loss (1)		957	(2)		—			(36	)(4)		25	(5)		946
Balance at May 10, 2014	$	(47,997	)	$	(50,472	)	$	133		$	(7,341	)	$	(105,677	)

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

(2) Represents amortization of pension liability adjustments, net of taxes of $807 for the twelve weeks ended May 9, 2015 and $630 for the twelve weeks ended May 10, 2014, which is recorded in Operating, selling, general and administrative expenses on the Condensed Consolidated Statements of Income. See “Note G – Pension and Savings Plans” for further discussion.

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

(4) Represents realized (losses) gains on marketable securities, net of taxes of $4 for the twelve weeks ended May 9, 2015 and $19 for the twelve weeks ended May 10, 2014 which is recorded in Operating, selling, general, and administrative expenses on the Condensed Consolidated Statements of Income. See “Note D – Marketable Securities” for further discussion.

(5) Represents gains and losses on derivatives, net of taxes of $15 for the twelve weeks ended May 9, 2015 and $17 for the twelve weeks ended May 10, 2014, which is recorded in Interest expense, net, on the Condensed Consolidated Statements of Income. See “Note E – Derivative Financial Instruments” for further discussion.

Changes in Accumulated other comprehensive loss for the thirty-six week periods ended May 9, 2015 and May 10, 2014, consisted of the following:

(in thousands)	Pension Liability			Foreign Currency (3)			Net Unrealized Gain on Securities			Derivatives			Total
Balance at August 30, 2014	$	(63,820	)	$	(57,836	)	$	76		$	(7,323	)	$	(128,903	)
Other comprehensive (loss) income before reclassifications		—			(72,138	)		61			—			(72,077	)
Amounts reclassified from Accumulated other comprehensive loss (1)		3,741	(2)		—			(20	)(4)		77	(5)		3,798
Balance at May 9, 2015	$	(60,079	)	$	(129,974	)	$	117		$	(7,246	)	$	(197,182	)

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

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

(2) Represents amortization of pension liability adjustments, net of taxes of $2,449 in fiscal 2015 and $1,898 in fiscal 2014, which is recorded in Operating, selling, general and administrative expenses on the Condensed Consolidated Statements of Income. See “Note G – Pension and Savings Plans” for further discussion.

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

(4) Represents realized (losses) gains on marketable securities, net of taxes of $11 in fiscal 2015 and $33 in fiscal 2014, which is recorded in Operating, selling, general, and administrative expenses on the Condensed Consolidated Statements of Income. See “Note D – Marketable Securities” for further discussion.

(5) Represents gains and losses on derivatives, net of taxes of $49 in fiscal 2015 and $48 is fiscal 2014, which is recorded in Interest expense, net, on the Condensed Consolidated Statements of Income. See “Note E – Derivative Financial Instruments” for further discussion.

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Financing - Additional Information (Detail) (USD $)	9 Months Ended		3 Months Ended	12 Months Ended	0 Months Ended
	May 09, 2015	May 10, 2014	May 09, 2015	Aug. 30, 2014	Jan. 14, 2014	Apr. 29, 2015	Dec. 19, 2014
Line of Credit Facility [Line Items]
Commercial paper	$ 934,500,000		934,500,000	893,800,000
Long-term debt	4,533,329,000		4,533,329,000	4,162,890,000
Remaining borrowing capacity under revolving credit facility	1,711,000,000		1,711,000,000
Amount available under credit facility	1,750,000,000		1,750,000,000
Proceeds from issuance of debt	648,829,000	400,000,000
Fair value of the Company's debt	4,635,000,000		4,635,000,000	4,480,000,000
Excess (shortfall) of fair value of debt over (from) carrying value	101,200,000		101,200,000	136,600,000
Commercial paper, weighted average interest rate of 0.45% and 0.27% at May 9, 2015 and August 30, 2014, respectively [Member]
Line of Credit Facility [Line Items]
Commercial paper	934,500,000		934,500,000
5.750% Senior Notes due January 2015, effective interest rate of 5.89% [Member]
Line of Credit Facility [Line Items]
Stated interest rate percentage	5.75%		5.75%	5.75%
Debt instrument maturity, month and year	2015-01		2015-01	2015-01
Repayment of commercial paper	500,000,000
Multi Year Revolving Credit Agreement [Member]
Line of Credit Facility [Line Items]
Amount available under credit facility							1,250,000,000
Extended expiration of credit facility	2 years
Amount available under credit facility							1,500,000,000
Borrowings, outstanding	0		0
Letters of credit, outstanding	3,500,000		3,500,000
Multi Year Revolving Credit Agreement [Member] | Capital Leases [Member]
Line of Credit Facility [Line Items]
Amount available under credit facility							225,000,000
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.
Expiration of credit facility	December 2019
Letters of Credit [Member]
Line of Credit Facility [Line Items]
Amount available under credit facility							200,000,000
364-Day Revolving Credit Agreement [Member]
Line of Credit Facility [Line Items]
Amount available under credit facility							500,000,000
Credit facility interest rate description	Interest accrues on Eurodollar loans at a defined Eurodollar rate, defined as LIBOR plus the applicable margin, as defined in the revolving credit facility, depending upon the Company's senior, unsecured, (non-credit enhanced) long-term debt rating.
Credit facility expiration date	Dec. 19, 2015
Credit facility expiration extension period subject to bank approval	364 days
Borrowings, outstanding	0		0
364-Day Revolving Credit Agreement [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Line of credit facility extension or modification period prior to expiration	45 days
Term Loan [Member]
Line of Credit Facility [Line Items]
Percentage of penalty for extending expiration period	1.00%
Term Loan [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Line of credit facility extension or modification period prior to expiration	15 days
Term Loan Maturity Period	1 year
1.300% Senior Notes due January 2017, effective interest rate 1.43% [Member]
Line of Credit Facility [Line Items]
Stated interest rate percentage					1.30%
Debt instrument maturity, month and year					2017-01
Proceeds from issuance of debt					400,000,000
6.500% Senior Notes due January 2014 [Member]
Line of Credit Facility [Line Items]
Commercial paper					500,000,000
Stated interest rate percentage					6.50%
Debt instrument maturity, month and year					2014-01
5.500% Senior Notes due November 2015, effective interest rate of 4.86% [Member]
Line of Credit Facility [Line Items]
Long-term debt	300,000,000		300,000,000
Stated interest rate percentage	5.50%		5.50%
Debt instrument maturity, month and year	2015-11
3.250% Senior Notes due April 2025, effective interest rate of 3.36% [Member]
Line of Credit Facility [Line Items]
Stated interest rate percentage						3.25%
Debt instrument maturity, month and year						2025-04
Proceeds from issuance of debt						400,000,000
2.500% Senior Notes due April 2021, effective interest rate of 2.62% [Member]
Line of Credit Facility [Line Items]
Stated interest rate percentage						2.50%
Debt instrument maturity, month and year						2021-04
Proceeds from issuance of debt						$ 250,000,000

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Segment Reporting (Tables)

9 Months Ended

May 09, 2015

Segment Reporting [Abstract]

Segment Results

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

	Twelve Weeks Ended						Thirty-Six Weeks Ended
(in thousands)	May 9, 2015			May 10, 2014			May 9, 2015			May 10, 2014
Net Sales
Auto Parts Locations	$	2,404,469		$	2,258,413		$	6,645,712		$	6,191,574
Other		88,552			83,132			251,224			234,043
Total	$	2,493,021		$	2,341,545		$	6,896,936		$	6,425,617
Segment Profit
Auto Parts Locations	$	1,256,753		$	1,171,098		$	3,464,166		$	3,210,084
Other		46,036			45,860			135,317			129,606
Gross profit		1,302,789			1,216,958			3,599,483			3,339,690
Operating, selling, general and administrative expenses		(788,840	)		(738,006	)		(2,315,704	)		(2,139,668	)
Interest expense, net		(31,779	)		(36,162	)		(103,374	)		(118,083	)
Income before income taxes	$	482,170		$	442,790		$	1,180,405		$	1,081,939

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General - Additional Information (Detail)	9 Months Ended
	May 09, 2015
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Description of reporting periods	Operating results for the twelve and thirty-six weeks ended May 9, 2015, are not necessarily indicative of the results that may be expected for the fiscal year ending August 29, 2015. Each of the first three quarters of AutoZone’s fiscal year consists of 12 weeks, and the fourth quarter consists of 16 or 17 weeks. The fourth quarters for fiscal 2015 and 2014 each have 16 weeks. Additionally, the Company’s business is somewhat seasonal in nature, with the highest sales generally occurring during the months of February through September and the lowest sales generally occurring in the months of December and January.
First Quarter [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Quarter period of fiscal year	84 days
Second Quarter [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Quarter period of fiscal year	84 days
Third Quarter [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Quarter period of fiscal year	84 days
Fourth Quarter [Member] | Minimum [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Quarter period of fiscal year	112 days
Fourth Quarter [Member] | Maximum [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Quarter period of fiscal year	119 days

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General

9 Months Ended

May 09, 2015

Accounting Policies [Abstract]

General

Note A – General

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles for interim financial information and with instructions to Form 10-Q and Article 10 of Regulation S-X of the Securities and Exchange Commission’s (the “SEC”) rules and regulations. Accordingly, they do not include all of the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments, including normal recurring accruals, considered necessary for a fair presentation have been included. For further information, refer to the consolidated financial statements and related notes included in the AutoZone, Inc. (“AutoZone” or the “Company”) Annual Report on Form 10-K for the year ended August 30, 2014.

Operating results for the twelve and thirty-six weeks ended May 9, 2015, are not necessarily indicative of the results that may be expected for the fiscal year ending August 29, 2015. Each of the first three quarters of AutoZone’s fiscal year consists of 12 weeks, and the fourth quarter consists of 16 or 17 weeks. The fourth quarters for fiscal 2015 and 2014 each have 16 weeks. Additionally, the Company’s business is somewhat seasonal in nature, with the highest sales generally occurring during the months of February through September and the lowest sales generally occurring in the months of December and January.

Recently Issued Accounting Pronouncements: In August 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-15, Presentation of Financial Statements – Going Concern. ASU 2014-15 will require management to assess an entity’s ability to continue as a going concern for each annual and interim reporting period and to provide related footnote disclosure in circumstances in which substantial doubt exists. The Company does not expect the provision of ASU 2014-15 to have a material impact on its consolidated financial statements as the application of this guidance affects disclosure only. This update will be effective for the Company beginning with its annual period ending August 26, 2017.

In January 2015, the FASB issued ASU 2015-01, Income Statement – Extraordinary and Unusual Items. ASU 2015-01 eliminates from GAAP the concept of extraordinary items. ASU 2015-01 eliminates the separate presentation of extraordinary items but does not change the requirement to disclose material items that are unusual or infrequent in nature. Eliminating the concept of extraordinary items will allow the entity to no longer have to assess whether a particular event or transaction is both unusual in nature and infrequent in occurrence. The Company does not expect the provision of ASU 2015-01 to have a material impact on its consolidated financial statements. This update will be effective for the Company beginning with its annual period ending August 26, 2017.

In April 2015, the FASB issued ASU 2015-03, Interest – Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. ASU 2015-03 requires debt issuance costs to be presented in the balance sheet as a reduction of the related debt liability rather than an asset. The update requires retrospective application and represents a change in accounting principle. The Company does not expect the provision of ASU 2015-03 to have a material impact on its consolidated financial statements, as the application of this guidance affects classification only. This update will be effective for the Company beginning with its annual period ending August 26, 2017.

In April 2015, the FASB issued ASU 2015-04, Compensation – Retirement Benefits (Topic 715): Practical Expedient for the Measurement Date of an Employer’s Defined Benefit Obligation and Plan Assets. ASU 2015-04 allows companies a choice to measure defined benefit plan assets and obligations using the month-end that is closest to the entity’s fiscal year-end and apply that practical expedient consistently from year-to-year. The practical expedient should be applied consistently to all plans if an entity has more than one plan. The Company does not expect the provision of ASU 2015-04 to have a material impact on its consolidated financial statements. This update will be effective for the Company beginning with its fiscal 2017 first quarter.

In April 2015, the FASB issued ASU 2015-05, Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement. ASU 2015-05 clarifies the accounting treatment for fees paid by a customer in cloud computing arrangements. Under the revised guidance, if a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If the cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. The revised guidance will not change a customer’s accounting for service contracts. Upon adoption, a reporting entity can elect to apply the new guidance prospectively after the effective date, or retrospectively. The Company does not expect the provision of ASU 2015-05 to have a material impact on its consolidated financial statements. This update will be effective for the Company beginning with its fiscal 2017 first quarter.

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Share-Based Payments - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	May 09, 2015	May 10, 2014	May 09, 2015	May 10, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense related to stock options and share purchase plans	$ 9.5	$ 8.3	$ 29.7	$ 29.0
Stock options exercised - Shares			311,285	194,130
Stock options exercised - Weighted average exercise price			$ 186.40	$ 177.95
Stock options granted			329,700	347,615
Weighted average grant date fair value of options granted			$ 106.26	$ 96.92
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Anti-dilutive shares excluded from the computation of earnings per share	1,140	0	2,240	0

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Pension and Savings Plans - Net Periodic Benefit Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	May 09, 2015	May 10, 2014	May 09, 2015	May 10, 2014
Compensation and Retirement Disclosure [Abstract]
Interest cost	$ 2,847	$ 3,016	$ 8,542	$ 9,048
Expected return on plan assets	(3,757)	(3,550)	(11,272)	(10,650)
Amortization of net loss	2,063	1,587	6,190	4,761
Net periodic pension expense	$ 1,153	$ 1,053	$ 3,460	$ 3,159

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Segment Reporting - Additional Information (Detail)	9 Months Ended
	May 09, 2015 Location Item
Segment Reporting [Abstract]
Number of operating segments	4
Number of reportable segments	1
Number of automotive parts and accessories locations in the United States, Puerto Rico, Mexico, and Brazil	5,512

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Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	May 09, 2015	Aug. 30, 2014
Current assets:
Cash and cash equivalents	$ 153,288	$ 124,485
Accounts receivable	212,068	200,899
Merchandise inventories	3,468,249	3,140,100
Other current assets	110,075	110,420
Deferred income taxes	6,810	4,708
Total current assets	3,950,490	3,580,612
Property and equipment:
Property and equipment	5,747,901	5,500,674
Less: Accumulated depreciation and amortization	(2,321,513)	(2,190,199)
Property and equipment, net	3,426,388	3,310,475
Goodwill	384,613	367,829
Deferred income taxes	48,447	45,137
Other long-term assets	222,502	213,805
Other long-term assets, total	655,562	626,771
Assets	8,032,440	7,517,858
Current liabilities:
Accounts payable	3,845,129	3,609,199
Accrued expenses and other	499,973	481,894
Income taxes payable	118,107	41,200
Deferred income taxes	229,893	227,891
Short-term borrowings		180,910
Total current liabilities	4,693,102	4,541,094
Long-term debt	4,533,329	4,162,890
Other long-term liabilities	449,254	435,731
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; 32,045 shares issued and 31,239 shares outstanding as of May 9, 2015; 33,858 shares issued and 32,304 shares outstanding as of August 30, 2014	321	339
Additional paid-in capital	914,803	843,504
Retained deficit	(1,819,875)	(1,529,123)
Accumulated other comprehensive loss	(197,182)	(128,903)
Treasury stock, at cost	(541,312)	(807,674)
Total stockholders' deficit	(1,643,245)	(1,621,857)
Liabilities and Stockholders' Deficit	$ 8,032,440	$ 7,517,858

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Stock Repurchase Program - Additional Information (Detail) (USD $)	0 Months Ended	9 Months Ended		208 Months Ended	1 Months Ended
	Mar. 24, 2015	May 09, 2015	May 10, 2014	May 09, 2015	Jun. 17, 2015	Mar. 23, 2015
Stock Repurchase Program [Line Items]
Stock repurchased cumulative, shares		1,376,933		138,300,000
Purchase of treasury stock		$ 840,918,000	$ 911,537,000	$ 14,872,000,000
Increase in authorization of stock repurchase, value	750,000,000
Stock repurchase authorized amended value	15,650,000,000					14,900,000,000
Remaining value authorized for share repurchases		778,300,000		778,300,000
Treasury stock acquired repurchase authorization		From January 1, 1998 to May 9, 2015 the Company has repurchased a total of 138.3 million shares at an aggregate cost of $14.872 billion, including 1,376,933 shares of its common stock at an aggregate cost of $840.9 million during thirty-six week period ended May 9, 2015. On March 24, 2015, the Board voted to increase the authorization by $750 million to raise the cumulative share repurchase authorization from $14.9 billion to $15.65 billion. Considering the cumulative repurchases as of May 9, 2015 the Company had $778.3 million remaining under the Board’s authorization to repurchase its common stock.
Share of treasury stock retired		2,100,000	3,200,000
Subsequent Event [Member]
Stock Repurchase Program [Line Items]
Stock repurchased cumulative, shares					453,006
Repurchased shares of common stock at an aggregate cost					308,500,000
Retained Deficit [Member]
Stock Repurchase Program [Line Items]
Treasury stock retired, cost method		(1,050,000,000)	(1,220,000,000)
Additional Paid-In Capital [Member]
Stock Repurchase Program [Line Items]
Treasury stock retired, cost method		$ (57,400,000)	$ (74,000,000)

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Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	May 09, 2015	May 10, 2014	May 09, 2015	May 10, 2014
Statement of Comprehensive Income [Abstract]
Pension liability adjustments, taxes	$ 807	$ 630	$ 2,449	$ 1,898
Unrealized gains (losses) on marketable securities, taxes	69	7	22	85
Net derivative activities, taxes	$ 264	$ 17	$ 49	$ 48

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Fair Value Measurements - Additional Information (Detail) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	May 09, 2015	Aug. 30, 2014
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term marketable securities	$ 14,088	$ 10,400
Long-term marketable securities	$ 74,319	$ 74,855

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General (Policies)

9 Months Ended

May 09, 2015

Accounting Policies [Abstract]

Fiscal Period

Operating results for the twelve and thirty-six weeks ended May 9, 2015, are not necessarily indicative of the results that may be expected for the fiscal year ending August 29, 2015. Each of the first three quarters of AutoZone’s fiscal year consists of 12 weeks, and the fourth quarter consists of 16 or 17 weeks. The fourth quarters for fiscal 2015 and 2014 each have 16 weeks. Additionally, the Company’s business is somewhat seasonal in nature, with the highest sales generally occurring during the months of February through September and the lowest sales generally occurring in the months of December and January.

Recently Issued Accounting Pronouncements

Recently Issued Accounting Pronouncements: In August 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-15, Presentation of Financial Statements – Going Concern. ASU 2014-15 will require management to assess an entity’s ability to continue as a going concern for each annual and interim reporting period and to provide related footnote disclosure in circumstances in which substantial doubt exists. The Company does not expect the provision of ASU 2014-15 to have a material impact on its consolidated financial statements as the application of this guidance affects disclosure only. This update will be effective for the Company beginning with its annual period ending August 26, 2017.

In January 2015, the FASB issued ASU 2015-01, Income Statement – Extraordinary and Unusual Items. ASU 2015-01 eliminates from GAAP the concept of extraordinary items. ASU 2015-01 eliminates the separate presentation of extraordinary items but does not change the requirement to disclose material items that are unusual or infrequent in nature. Eliminating the concept of extraordinary items will allow the entity to no longer have to assess whether a particular event or transaction is both unusual in nature and infrequent in occurrence. The Company does not expect the provision of ASU 2015-01 to have a material impact on its consolidated financial statements. This update will be effective for the Company beginning with its annual period ending August 26, 2017.

In April 2015, the FASB issued ASU 2015-03, Interest – Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. ASU 2015-03 requires debt issuance costs to be presented in the balance sheet as a reduction of the related debt liability rather than an asset. The update requires retrospective application and represents a change in accounting principle. The Company does not expect the provision of ASU 2015-03 to have a material impact on its consolidated financial statements, as the application of this guidance affects classification only. This update will be effective for the Company beginning with its annual period ending August 26, 2017.

In April 2015, the FASB issued ASU 2015-04, Compensation – Retirement Benefits (Topic 715): Practical Expedient for the Measurement Date of an Employer’s Defined Benefit Obligation and Plan Assets. ASU 2015-04 allows companies a choice to measure defined benefit plan assets and obligations using the month-end that is closest to the entity’s fiscal year-end and apply that practical expedient consistently from year-to-year. The practical expedient should be applied consistently to all plans if an entity has more than one plan. The Company does not expect the provision of ASU 2015-04 to have a material impact on its consolidated financial statements. This update will be effective for the Company beginning with its fiscal 2017 first quarter.

In April 2015, the FASB issued ASU 2015-05, Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement. ASU 2015-05 clarifies the accounting treatment for fees paid by a customer in cloud computing arrangements. Under the revised guidance, if a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If the cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. The revised guidance will not change a customer’s accounting for service contracts. Upon adoption, a reporting entity can elect to apply the new guidance prospectively after the effective date, or retrospectively. The Company does not expect the provision of ASU 2015-05 to have a material impact on its consolidated financial statements. This update will be effective for the Company beginning with its fiscal 2017 first quarter.

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Marketable Securities - Available-for-Sale Marketable Securities (Detail) (USD $) In Thousands, unless otherwise specified	May 09, 2015	Aug. 30, 2014
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	$ 88,226	$ 85,138
Available-For-Sale Marketable Securities, Gross Unrealized Gains	267	210
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(86)	(93)
Available-For-Sale Marketable Securities, Fair Value	88,407	85,255
Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	35,226	37,265
Available-For-Sale Marketable Securities, Gross Unrealized Gains	159	137
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(4)	(15)
Available-For-Sale Marketable Securities, Fair Value	35,381	37,387
Government Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	27,254	16,822
Available-For-Sale Marketable Securities, Gross Unrealized Gains	61	16
Available-For-Sale Marketable Securities, Gross Unrealized Losses		(1)
Available-For-Sale Marketable Securities, Fair Value	27,315	16,837
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	10,103	8,791
Available-For-Sale Marketable Securities, Gross Unrealized Gains	26	22
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(82)	(77)
Available-For-Sale Marketable Securities, Fair Value	10,047	8,736
Asset-Backed Securities and Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	15,643	22,260
Available-For-Sale Marketable Securities, Gross Unrealized Gains	21	35
Available-For-Sale Marketable Securities, Fair Value	$ 15,664	$ 22,295

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Fair Value Measurements (Tables)

9 Months Ended

May 09, 2015

Fair Value Disclosures [Abstract]

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

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

	May 9, 2015
(in thousands)	Level 1		Level 2		Level 3		Fair Value
Other current assets	$	13,595	$	493	$	—	$	14,088
Other long-term assets		53,716		20,603		—		74,319
	$	67,311	$	21,096	$	—	$	88,407

	August 30, 2014
(in thousands)	Level 1		Level 2		Level 3		Fair Value
Other current assets	$	9,801	$	599	$	—	$	10,400
Other long-term assets		53,133		21,722		—		74,855
	$	62,934	$	22,321	$	—	$	85,255

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Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	May 09, 2015	May 10, 2014
Cash flows from operating activities:
Net income	$ 759,104	$ 696,074
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of property and equipment and intangibles	183,211	172,286
Amortization of debt origination fees	4,274	4,895
Income tax benefit from exercise of stock options	(44,656)	(18,296)
Deferred income taxes	(5,431)	(21,234)
Share-based compensation expense	29,688	28,985
Changes in operating assets and liabilities:
Accounts receivable	5,395	(17,757)
Merchandise inventories	(294,330)	(267,801)
Accounts payable and accrued expenses	230,817	240,156
Income taxes payable	121,290	142,925
Other, net	9,750	10,885
Net cash provided by operating activities	999,112	971,118
Cash flows from investing activities:
Capital expenditures	(292,745)	(261,724)
Acquisition of business, net of cash	(75,744)
Purchase of intangibles	(10,000)	(11,112)
Purchase of marketable securities	(26,438)	(28,616)
Proceeds from sale of marketable securities	23,350	25,013
Disposal of capital assets and other, net	(3,147)	1,471
Net cash used in investing activities	(384,724)	(274,968)
Cash flows from financing activities:
Net proceeds from commercial paper	40,700	291,400
Proceeds from issuance of debt	648,829	400,000
Repayment of debt	(500,000)	(500,000)
Net proceeds from sale of common stock	57,015	34,412
Purchase of treasury stock	(840,918)	(911,537)
Income tax benefit from exercise of stock options	44,656	18,296
Payments of capital lease obligations	(26,664)	(24,248)
Other, net	(7,528)	(2,294)
Net cash used in financing activities	(583,910)	(693,971)
Effect of exchange rate changes on cash	(1,675)	979
Net increase in cash and cash equivalents	28,803	3,158
Cash and cash equivalents at beginning of period	124,485	142,191
Cash and cash equivalents at end of period	$ 153,288	$ 145,349

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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)	May 09, 2015	Aug. 30, 2014
Statement of Financial Position [Abstract]
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	32,045,000	33,858,000
Common stock, shares outstanding	31,239,000	32,304,000

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Accumulated Other Comprehensive Loss

9 Months Ended

May 09, 2015

Equity [Abstract]

Accumulated Other Comprehensive Loss

Note J – Accumulated Other Comprehensive Loss

Accumulated other comprehensive loss includes certain adjustments to pension liabilities, foreign currency translation adjustments, certain activity for interest rate swaps and treasury rate locks that qualify as cash flow hedges and unrealized gains (losses) on available-for-sale securities. Changes in Accumulated other comprehensive loss for the twelve week periods ended May 9, 2015 and May 10, 2014 consisted of the following:

(in thousands)	Pension Liability			Foreign Currency (3)			Net Unrealized Gain on Securities			Derivatives			Total
Balance at February 14, 2015	$	(61,335	)	$	(116,689	)	$	(12	)	$	(7,550	)	$	(185,586	)
Other comprehensive (loss) income before reclassifications		—			(13,285	)		121			277			(12,887	)
Amounts reclassified from Accumulated other comprehensive loss (1)		1,256	(2)		—			8	(4)		27	(5)		1,291
Balance at May 9, 2015	$	(60,079	)	$	(129,974	)	$	117		$	(7,246	)	$	(197,182	)
(in thousands)	Pension Liability			Foreign Currency (3)			Net Unrealized Gain on Securities			Derivatives			Total
Balance at February 15, 2014	$	(48,954	)	$	(64,172	)	$	146		$	(7,366	)	$	(120,346	)
Other comprehensive income before reclassifications		—			13,700			23			—			13,723
Amounts reclassified from Accumulated other comprehensive loss (1)		957	(2)		—			(36	)(4)		25	(5)		946
Balance at May 10, 2014	$	(47,997	)	$	(50,472	)	$	133		$	(7,341	)	$	(105,677	)

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

(2) Represents amortization of pension liability adjustments, net of taxes of $807 for the twelve weeks ended May 9, 2015 and $630 for the twelve weeks ended May 10, 2014, which is recorded in Operating, selling, general and administrative expenses on the Condensed Consolidated Statements of Income. See “Note G – Pension and Savings Plans” for further discussion.

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

(4) Represents realized (losses) gains on marketable securities, net of taxes of $4 for the twelve weeks ended May 9, 2015 and $19 for the twelve weeks ended May 10, 2014 which is recorded in Operating, selling, general, and administrative expenses on the Condensed Consolidated Statements of Income. See “Note D – Marketable Securities” for further discussion.

(5) Represents gains and losses on derivatives, net of taxes of $15 for the twelve weeks ended May 9, 2015 and $17 for the twelve weeks ended May 10, 2014, which is recorded in Interest expense, net, on the Condensed Consolidated Statements of Income. See “Note E – Derivative Financial Instruments” for further discussion.

Changes in Accumulated other comprehensive loss for the thirty-six week periods ended May 9, 2015 and May 10, 2014, consisted of the following:

(in thousands)	Pension Liability			Foreign Currency (3)			Net Unrealized Gain on Securities			Derivatives			Total
Balance at August 30, 2014	$	(63,820	)	$	(57,836	)	$	76		$	(7,323	)	$	(128,903	)
Other comprehensive (loss) income before reclassifications		—			(72,138	)		61			—			(72,077	)
Amounts reclassified from Accumulated other comprehensive loss (1)		3,741	(2)		—			(20	)(4)		77	(5)		3,798
Balance at May 9, 2015	$	(60,079	)	$	(129,974	)	$	117		$	(7,246	)	$	(197,182	)

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

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

(2) Represents amortization of pension liability adjustments, net of taxes of $2,449 in fiscal 2015 and $1,898 in fiscal 2014, which is recorded in Operating, selling, general and administrative expenses on the Condensed Consolidated Statements of Income. See “Note G – Pension and Savings Plans” for further discussion.

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

(4) Represents realized (losses) gains on marketable securities, net of taxes of $11 in fiscal 2015 and $33 in fiscal 2014, which is recorded in Operating, selling, general, and administrative expenses on the Condensed Consolidated Statements of Income. See “Note D – Marketable Securities” for further discussion.

(5) Represents gains and losses on derivatives, net of taxes of $49 in fiscal 2015 and $48 is fiscal 2014, which is recorded in Interest expense, net, on the Condensed Consolidated Statements of Income. See “Note E – Derivative Financial Instruments” for further discussion.

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Document and Entity Information	9 Months Ended
	May 09, 2015	Jun. 12, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	May 09, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Trading Symbol	AZO
Entity Registrant Name	AUTOZONE INC
Entity Central Index Key	0000866787
Current Fiscal Year End Date	--08-29
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		30,872,432

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Acquisition

9 Months Ended

May 09, 2015

Business Combinations [Abstract]

Acquisition

Note K – Acquisition

Effective September 27, 2014, the Company acquired the outstanding stock of Interamerican Motor Corporation (“IMC”), the second largest distributor of quality import replacement parts in the United States, for $75.7 million, net of cash. IMC specializes in parts coverage for European and Asian cars. With this acquisition, the Company expects to grow its share in the aftermarket import car parts market. The results of operations from IMC have been included in the Company’s Auto Parts Locations business activities since the date of acquisition. Pro forma results of operations related to the acquisition of IMC are not presented as IMC’s results are not material to the Company’s condensed consolidated statements of operations. The purchase price allocation resulted in goodwill of $16.8 million and intangible assets totaling $7.7 million. Goodwill generated from the acquisition is primarily attributable to expected synergies and the assembled workforce. The allocation of the purchase price to goodwill and intangible assets is preliminary as of May 9, 2015 and subject to change upon completion of the final valuation of these assets.

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Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	May 09, 2015	May 10, 2014	May 09, 2015	May 10, 2014
Income Statement [Abstract]
Net sales	$ 2,493,021	$ 2,341,545	$ 6,896,936	$ 6,425,617
Cost of sales, including warehouse and delivery expenses	1,190,232	1,124,587	3,297,453	3,085,927
Gross profit	1,302,789	1,216,958	3,599,483	3,339,690
Operating, selling, general and administrative expenses	788,840	738,006	2,315,704	2,139,668
Operating profit	513,949	478,952	1,283,779	1,200,022
Interest expense, net	31,779	36,162	103,374	118,083
Income before income taxes	482,170	442,790	1,180,405	1,081,939
Income taxes	173,099	157,633	421,301	385,865
Net income	$ 309,071	$ 285,157	$ 759,104	$ 696,074
Weighted average shares for basic earnings per share	31,643	33,073	31,893	33,610
Effect of dilutive stock equivalents	658	643	641	607
Weighted average shares for diluted earnings per share	32,301	33,716	32,534	34,217
Basic earnings per share	$ 9.77	$ 8.62	$ 23.80	$ 20.71
Diluted earnings per share	$ 9.57	$ 8.46	$ 23.33	$ 20.34

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Derivative Financial Instruments

9 Months Ended

May 09, 2015

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

Note E – Derivative Financial Instruments

At May 9, 2015, the Company had $11.5 million recorded in Accumulated other comprehensive loss related to realized losses associated with terminated interest rate swap and treasury rate lock derivatives which were designated as hedging instruments. Net losses are amortized into Interest expense over the remaining life of the associated debt. During the twelve week period ended May 9, 2015, the Company reclassified $42 thousand of net losses from Accumulated other comprehensive loss to Interest expense. In the comparable prior year period, the Company reclassified $42 thousand from Accumulated other comprehensive loss to Interest expense. During the thirty-six week period ended May 9, 2015, the Company reclassified $126 thousand of net losses from Accumulated other comprehensive loss to Interest expense. In the comparable prior year period, the Company reclassified $126 thousand of net losses from Accumulated other comprehensive loss to Interest expense. The Company expects to reclassify $1.2 million of net losses from Accumulated other comprehensive loss to Interest expense over the next twelve months.

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Marketable Securities

9 Months Ended

May 09, 2015

Investments, Debt and Equity Securities [Abstract]

Marketable Securities

Note D – Marketable Securities

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

	May 9, 2015
(in thousands)	Amortized Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate securities	$	35,226	$	159	$	(4	)	$	35,381
Government bonds		27,254		61		—			27,315
Mortgage-backed securities		10,103		26		(82	)		10,047
Asset-backed securities and other		15,643		21		—			15,664
	$	88,226	$	267	$	(86	)	$	88,407

	August 30, 2014
(in thousands)	Amortized Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate securities	$	37,265	$	137	$	(15	)	$	37,387
Government bonds		16,822		16		(1	)		16,837
Mortgage-backed securities		8,791		22		(77	)		8,736
Asset-backed securities and other		22,260		35		—			22,295
	$	85,138	$	210	$	(93	)	$	85,255

The debt securities held at May 9, 2015 had effective maturities ranging from less than one year to approximately three years. The Company did not realize any material gains or losses on its marketable securities during the thirty-six week period ended May 9, 2015.

The Company holds 19 securities that are in an unrealized loss position of approximately $86 thousand at May 9, 2015. The Company has the intent and ability to hold these investments until recovery of fair value or maturity, and does not deem the investments to be impaired on an other than temporary basis. In evaluating whether the securities are deemed to be impaired on an other than temporary basis, the Company considers factors such as the duration and severity of the loss position, the credit worthiness of the investee, the term to maturity and the intent and ability to hold the investments until maturity or until recovery of fair value.

Included above in total marketable securities are $45.5 million of marketable securities transferred by the Company’s insurance captive to a trust account to secure its obligations to an insurance company related to future workers’ compensation and casualty losses.

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Share-Based Payments (Tables)

9 Months Ended

May 09, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

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

The weighted average fair value of the stock option awards granted during the thirty-six week periods ended May 9, 2015, and May 10, 2014, using the Black-Scholes-Merton multiple-option pricing valuation model, was $106.26 and $96.92 per share, respectively, using the following weighted average key assumptions:

	Thirty-Six Weeks Ended
	May 9, 2015			May 10, 2014
Expected price volatility		20	%		23	%
Risk-free interest rate		1.4	%		1.0	%
Weighted average expected lives (in years)		5.1			5.2
Forfeiture rate		9	%		9	%
Dividend yield		0	%		0	%

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Goodwill and Intangibles

9 Months Ended

May 09, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangibles

Note L – Goodwill and Intangibles

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

(in thousands)	Auto Parts Locations		Other		Total
Net balance as of August 30, 2014	$	302,645	$	65,184	$	367,829
Goodwill adjustments added through acquisition(1)		16,784		—		16,784
Net balance as of May 9, 2015	$	319,429	$	65,184	$	384,613

(1) See Note K for discussion of the acquisition completed during the thirty-six weeks ended May 9, 2015

The Company recorded an increase to intangible assets of $7.7 million during the thirty-six weeks ended May 9, 2015 related to the acquisition of IMC. The carrying amounts of intangible assets are included in Other long-term assets as follows:

(in thousands)	Estimated Useful Life		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Amortizing intangible assets:
Technology		3-5 years	$	10,570	$	(5,071	)	$	5,499
Noncompete agreements		5 years		1,300		(623	)		677
Customer relationships		3-10 years		53,776		(10,472	)		43,304
			$	65,646	$	(16,166	)		49,480
Non-amortizing intangible asset:
Trade name									26,900
Total intangible assets other than goodwill								$	76,380

Amortization expense of intangible assets for the twelve and thirty-six week period ended May 9, 2015 was $2.0 million and $6.2 million, respectively. Amortization expense of intangible assets for the twelve and thirty-six week periods ended May 10, 2014 was $2.0 million and $4.4 million, respectively.

During the thirty-six week period ended May 9, 2015, the Company made an installment payment for $10 million related to certain customer relationships purchased during fiscal 2014 relating to its ALLDATA operations.

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Financing

9 Months Ended

May 09, 2015

Debt Disclosure [Abstract]

Financing

Note H – Financing

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

(in thousands)	May 9, 2015		August 30, 2014
5.750% Senior Notes due January 2015, effective interest rate of 5.89%	$	—	$	500,000
5.500% Senior Notes due November 2015, effective interest rate of 4.86%		300,000		300,000
6.950% Senior Notes due June 2016, effective interest rate of 7.09%		200,000		200,000
1.300% Senior Notes due January 2017, effective interest rate of 1.43%		400,000		400,000
7.125% Senior Notes due August 2018, effective interest rate of 7.28%		250,000		250,000
4.000% Senior Notes due November 2020, effective interest rate of 4.43%		500,000		500,000
2.500% Senior Notes due April 2021, effective interest rate of 2.62%		249,905		—
3.700% Senior Notes due April 2022, effective interest rate of 3.85%		500,000		500,000
2.875% Senior Notes due January 2023, effective interest rate of 3.21%		300,000		300,000
3.125% Senior Notes due July 2023, effective interest rate of 3.26%		500,000		500,000
3.250% Senior Notes due April 2025, effective interest rate of 3.36%		398,924		—
Commercial paper, weighted average interest rate of 0.45% and 0.27% at May 9, 2015 and August 30, 2014, respectively		934,500		893,800
Total debt		4,533,329		4,343,800
Less: Short-term borrowings		—		180,910
Long-term debt	$	4,533,329	$	4,162,890

As of May 9, 2015, $934.5 million of commercial paper borrowings and the $300 million 5.500% Senior Notes due November 2015 are classified as long-term in the accompanying Consolidated Balance Sheets as the Company has the ability and intent to refinance on a long-term basis through available capacity in its revolving credit facilities. As of May 9, 2015, the Company had $1.711 billion of availability under its $1.750 billion revolving credit facilities, which would allow it to replace these short-term obligations with long-term financing.

On April 29, 2015, the Company issued $400 million in 3.250% Notes due April 2025 and $250 million in 2.500% Notes due April 2021 under its shelf registration statement filed with the SEC on April 15, 2015 (the “New Shelf Registration”). The New 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 location openings, stock repurchases and acquisitions. Proceeds from the debt issuances were used to repay a portion of the outstanding commercial paper borrowings, which were used to repay the $500 million in 5.750% Senior Notes due in January 2015, and for general corporate purposes.

On January 14, 2014, the Company issued $400 million in 1.300% Senior Notes due January 2017 under its shelf registration statement filed with the SEC on April 17, 2012 (the “Shelf Registration”). Proceeds from the debt issuance on January 14, 2014, were used to repay a portion of the $500 million in 6.500% Senior Notes due January 2014. The Company used commercial paper borrowings to repay the remainder of the 6.500% Senior Notes.

On December 19, 2014, the Company amended and restated its existing revolving credit facility (the “Multi-Year Credit Agreement”) by increasing the amount of capital leases allowable to $225 million, extending the expiration date by two years, and renegotiations of other terms and conditions. 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 is $1.25 billion and may be increased to $1.5 billion prior to the maturity date at the Company’s election and subject to bank credit capacity and approval, may include up to $200 million in letters of credit and may include up to $225 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 December 2019.

On December 19, 2014, the Company entered into a new revolving credit facility (the “364-Day Credit Agreement”). The credit facility is available to primarily support commercial paper borrowings and other short-term unsecured bank loans. The 364-Day Credit Agreement provides for loans in the principal amount of up to $500 million. Under the credit facility, the Company may borrow funds consisting of Eurodollar loans, base rate loans, or a combination of both. Interest accrues on Eurodollar loans at a defined Eurodollar rate, defined as LIBOR plus the applicable margin, 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. This credit facility expires on December 19, 2015, but the Company may request an extension of the termination date for 364 days no later than 45 days prior to December 19, 2015, subject to bank approval. In addition, the Company has the right to request a term-loan, at least 15 days prior to December 19, 2015, up to one year from the termination date, subject to a 1% penalty.

As of May 9, 2015, the Company had no outstanding borrowings under each of the revolving credit facilities and $3.5 million of outstanding letters of credit under the Multi-Year Credit Agreement.

The fair value of the Company’s debt was estimated at $4.635 billion as of May 9, 2015 and $4.480 billion as of August 30, 2014, 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 $101.2 million at May 9, 2015 and $136.6 million at August 30, 2014.

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Merchandise Inventories

9 Months Ended

May 09, 2015

Inventory Disclosure [Abstract]

Merchandise Inventories

Note F – Merchandise Inventories

Inventories are stated at the lower of cost or market using the last-in, first-out (“LIFO”) method for domestic inventories and the first-in, first-out (“FIFO”) method for Mexico and Brazil inventories. Included in inventories are related purchasing, storage and handling costs. Due to price deflation on the Company’s merchandise purchases, the Company’s domestic inventory balances are effectively maintained under the FIFO method. The Company’s policy is not to write up inventory in excess of replacement cost. The cumulative balance of this unrecorded adjustment, which will be reduced upon experiencing price inflation on the Company’s merchandise purchases, was $323.8 million at May 9, 2015 and $307.2 million at August 30, 2014.

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Pension and Savings Plans

9 Months Ended

May 09, 2015

Compensation and Retirement Disclosure [Abstract]

Pension and Savings Plans

Note G – Pension and Savings Plans

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

	Twelve Weeks Ended						Thirty-Six Weeks Ended
(in thousands)	May 9, 2015			May 10, 2014			May 9, 2015			May 10, 2014
Interest cost	$	2,847		$	3,016		$	8,542		$	9,048
Expected return on plan assets		(3,757	)		(3,550	)		(11,272	)		(10,650	)
Amortization of net loss		2,063			1,587			6,190			4,761
Net periodic pension expense	$	1,153		$	1,053		$	3,460		$	3,159

The Company makes contributions in amounts at least equal to the minimum funding requirements of the Employee Retirement Income Security Act of 1974, as amended by the Pension Protection Act of 2006. During the thirty-six week period ended May 9, 2015, the Company made contributions to its funded plan in the amount of $3.9 million. The Company expects to contribute approximately $13.0 million to the plan during the remainder of fiscal 2015; however, a change to the expected cash funding may be impacted by a change in interest rates or a change in the actual or expected return on plan assets.

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Stock Repurchase Program

9 Months Ended

May 09, 2015

Equity [Abstract]

Stock Repurchase Program

Note I – Stock Repurchase Program

From January 1, 1998 to May 9, 2015 the Company has repurchased a total of 138.3 million shares at an aggregate cost of $14.872 billion, including 1,376,933 shares of its common stock at an aggregate cost of $840.9 million during thirty-six week period ended May 9, 2015. On March 24, 2015, the Board voted to increase the authorization by $750 million to raise the cumulative share repurchase authorization from $14.9 billion to $15.65 billion. Considering the cumulative repurchases as of May 9, 2015 the Company had $778.3 million remaining under the Board’s authorization to repurchase its common stock.

Subsequent to May 9, 2015 the Company has repurchased 453,006 shares of its common stock at an aggregate cost of $308.5 million.

During the thirty-six week period ended May 9, 2015, the Company retired 2.1 million shares of treasury stock which had previously been repurchased under the Company’s share repurchase program. The retirement increased Retained deficit by $1.050 billion and decreased Additional paid-in capital by $57.4 million. During the comparable prior year period, the Company retired 3.2 million shares of treasury stock, which increased Retained deficit by $1.220 billion and decreased Additional paid-in capital by $74.0 million.

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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	May 09, 2015	Aug. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other current assets	$ 14,088	$ 10,400
Other long-term assets	74,319	74,855
Total	88,407	85,255
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other current assets	13,595	9,801
Other long-term assets	53,716	53,133
Total	67,311	62,934
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other current assets	493	599
Other long-term assets	20,603	21,722
Total	$ 21,096	$ 22,321

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Goodwill and Intangibles - Schedule of Carrying Amounts of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	May 09, 2015
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	$ 65,646
Finite Lived, Accumulated Amortization	(16,166)
Finite Lived, Net Carrying Amount	49,480
Total intangible assets other than goodwill, Net Carrying Amount	76,380
Technology [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	10,570
Finite Lived, Accumulated Amortization	(5,071)
Finite Lived, Net Carrying Amount	5,499
Noncompete Agreements [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Finite Lived, Gross Carrying Amount	1,300
Finite Lived, Accumulated Amortization	(623)
Finite Lived, Net Carrying Amount	677
Customer Relationships [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	53,776
Finite Lived, Accumulated Amortization	(10,472)
Finite Lived, Net Carrying Amount	43,304
Minimum [Member] | Technology [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	3 years
Minimum [Member] | Customer Relationships [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	3 years
Maximum [Member] | Technology [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Maximum [Member] | Customer Relationships [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	10 years
Trade Name [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Non-amortizing intangible asset - Trade name, Net Carrying Amount	$ 26,900

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Segment Reporting

9 Months Ended

May 09, 2015

Segment Reporting [Abstract]

Segment Reporting

Note N – Segment Reporting

The Company’s four operating segments (Domestic Auto Parts, Mexico, Brazil, and IMC) are aggregated as one reportable segment: Auto Parts Locations. The criteria the Company used to identify the reportable segment are primarily the nature of the products the Company sells and the operating results that are regularly reviewed by the Company’s chief operating decision maker to make decisions about the resources to be allocated to the business units and to assess performance. The accounting policies of the Company’s reportable segment are the same as those described in Note A in its Annual Report on Form 10-K for the year ended August 30, 2014.

The Auto Parts Locations segment is a retailer and distributor of automotive parts and accessories through the Company’s 5,512 locations in the United States, Puerto Rico, Mexico, and Brazil. Each location carries an extensive product line for cars, sport utility vehicles, vans and light trucks, including new and remanufactured automotive hard parts, maintenance items, accessories and non-automotive products.

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

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

	Twelve Weeks Ended						Thirty-Six Weeks Ended
(in thousands)	May 9, 2015			May 10, 2014			May 9, 2015			May 10, 2014
Net Sales
Auto Parts Locations	$	2,404,469		$	2,258,413		$	6,645,712		$	6,191,574
Other		88,552			83,132			251,224			234,043
Total	$	2,493,021		$	2,341,545		$	6,896,936		$	6,425,617
Segment Profit
Auto Parts Locations	$	1,256,753		$	1,171,098		$	3,464,166		$	3,210,084
Other		46,036			45,860			135,317			129,606
Gross profit		1,302,789			1,216,958			3,599,483			3,339,690
Operating, selling, general and administrative expenses		(788,840	)		(738,006	)		(2,315,704	)		(2,139,668	)
Interest expense, net		(31,779	)		(36,162	)		(103,374	)		(118,083	)
Income before income taxes	$	482,170		$	442,790		$	1,180,405		$	1,081,939

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Pension and Savings Plans (Tables)

9 Months Ended

May 09, 2015

Compensation and Retirement Disclosure [Abstract]

Net Periodic Benefit Expense

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

	Twelve Weeks Ended						Thirty-Six Weeks Ended
(in thousands)	May 9, 2015			May 10, 2014			May 9, 2015			May 10, 2014
Interest cost	$	2,847		$	3,016		$	8,542		$	9,048
Expected return on plan assets		(3,757	)		(3,550	)		(11,272	)		(10,650	)
Amortization of net loss		2,063			1,587			6,190			4,761
Net periodic pension expense	$	1,153		$	1,053		$	3,460		$	3,159

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Goodwill and Intangibles - Schedule of Changes in Carrying Amount of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	May 09, 2015
Goodwill [Line Items]
Goodwill, Beginning balance	$ 367,829
Goodwill adjustments added through acquisition	16,784
Goodwill, Ending balance	384,613
Auto Parts Locations [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	302,645
Goodwill adjustments added through acquisition	16,784
Goodwill, Ending balance	319,429
Other [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	65,184
Goodwill adjustments added through acquisition	0
Goodwill, Ending balance	$ 65,184

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Pension and Savings Plans - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	May 09, 2015
Compensation and Retirement Disclosure [Abstract]
Annual contributions by the Company to pension plans	$ 3.9
Expected contributions to the plans by the Company in fiscal 2015	$ 13.0

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Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	May 09, 2015		May 10, 2014		May 09, 2015		May 10, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 309,071		$ 285,157		$ 759,104		$ 696,074
Other comprehensive (loss) income:
Pension liability adjustments, net of taxes	1,256	[1]	957	[1]	3,741	[1]	2,864	[1]
Foreign currency translation adjustments	(13,285)		13,700		(72,138)		12,011
Unrealized gains (losses) on marketable securities, net of taxes	129	[2]	(13)	[2]	41	[2]	158	[2]
Net derivative activities, net of taxes	304	[3]	25	[3]	77	[3]	78	[3]
Total other comprehensive (loss) income	(11,596)		14,669		(68,279)		15,111
Comprehensive income	$ 297,475		$ 299,826		$ 690,825		$ 711,185

[1] Pension liability adjustments are presented net of taxes of $807 in fiscal 2015 and $630 in fiscal 2014 for the twelve weeks ended and $2,449 in fiscal 2015 and $1,898 in fiscal 2014 for the thirty-six weeks ended

[2] Unrealized gains (losses) on marketable securities are presented net of taxes of $69 in fiscal 2015 and $7 in fiscal 2014 for the twelve weeks ended and $22 in fiscal 2015 and $85 in fiscal 2014 for the thirty-six weeks ended

[3] Net derivative activities are presented net of taxes of $264 in fiscal 2015 and $17 in fiscal 2014 for the twelve weeks ended and $49 in fiscal 2015 and $48 in fiscal 2014 for the thirty-six weeks ended

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Fair Value Measurements

9 Months Ended

May 09, 2015

Fair Value Disclosures [Abstract]

Fair Value Measurements

Note C – Fair Value Measurements

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

The hierarchy prioritizes the inputs into three broad levels:

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

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

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

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

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

	May 9, 2015
(in thousands)	Level 1		Level 2		Level 3		Fair Value
Other current assets	$	13,595	$	493	$	—	$	14,088
Other long-term assets		53,716		20,603		—		74,319
	$	67,311	$	21,096	$	—	$	88,407
	August 30, 2014
(in thousands)	Level 1		Level 2		Level 3		Fair Value
Other current assets	$	9,801	$	599	$	—	$	10,400
Other long-term assets		53,133		21,722		—		74,855
	$	62,934	$	22,321	$	—	$	85,255

At May 9, 2015, the fair value measurement amounts for assets and liabilities recorded in the accompanying Condensed Consolidated Balance Sheet consisted of short-term marketable securities of $14.1 million, which are included within Other current assets, and long-term marketable securities of $74.3 million, which are included in Other long-term assets. The Company’s marketable securities are typically valued at the closing price in the principal active market as of the last business day of the quarter or through the use of other market inputs relating to the securities, including benchmark yields and reported trades. The fair values of the marketable securities, by asset class, are described in “Note D – Marketable Securities.”

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

Non-financial assets are required to be measured at fair value on a non-recurring basis in certain circumstances, including the event of impairment. The assets could include assets acquired in an acquisition as well as property, plant and equipment that are determined to be impaired. During the thirty-six week periods ended May 9, 2015 and May 10, 2014 the Company did not have any significant non-financial assets measured at fair value on a non-recurring basis in periods subsequent to initial recognition.

Financial Instruments not Recognized at Fair Value

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

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Financing (Tables)

9 Months Ended

May 09, 2015

Debt Disclosure [Abstract]

Schedule of Debt

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

(in thousands)	May 9, 2015		August 30, 2014
5.750% Senior Notes due January 2015, effective interest rate of 5.89%	$	—	$	500,000
5.500% Senior Notes due November 2015, effective interest rate of 4.86%		300,000		300,000
6.950% Senior Notes due June 2016, effective interest rate of 7.09%		200,000		200,000
1.300% Senior Notes due January 2017, effective interest rate of 1.43%		400,000		400,000
7.125% Senior Notes due August 2018, effective interest rate of 7.28%		250,000		250,000
4.000% Senior Notes due November 2020, effective interest rate of 4.43%		500,000		500,000
2.500% Senior Notes due April 2021, effective interest rate of 2.62%		249,905		—
3.700% Senior Notes due April 2022, effective interest rate of 3.85%		500,000		500,000
2.875% Senior Notes due January 2023, effective interest rate of 3.21%		300,000		300,000
3.125% Senior Notes due July 2023, effective interest rate of 3.26%		500,000		500,000
3.250% Senior Notes due April 2025, effective interest rate of 3.36%		398,924		—
Commercial paper, weighted average interest rate of 0.45% and 0.27% at May 9, 2015 and August 30, 2014, respectively		934,500		893,800
Total debt		4,533,329		4,343,800
Less: Short-term borrowings		—		180,910
Long-term debt	$	4,533,329	$	4,162,890

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Derivative Financial Instruments - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	May 09, 2015	May 10, 2014	May 09, 2015	May 10, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative losses recorded in Accumulated other comprehensive loss	$ 11,500,000
Net derivative losses amortized into Interest expense	(42,000)	(42,000)	(126,000)	(126,000)
Net derivative loss expected to be reclassified over next 12 months	$ 1,200,000		$ 1,200,000

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Litigation

9 Months Ended

May 09, 2015

Commitments and Contingencies Disclosure [Abstract]

Litigation

Note M – Litigation

In 2004, the Company acquired a store site in Mount Ephraim, New Jersey that had previously been the site of a gasoline service station and contained evidence of groundwater contamination. Upon acquisition, the Company voluntarily reported the groundwater contamination issue to the New Jersey Department of Environmental Protection and entered into a Voluntary Remediation Agreement providing for the remediation of the contamination associated with the property. The Company has conducted and paid for (at an immaterial cost to the Company) remediation of contamination on the property. The Company is also investigating, and will be addressing, potential vapor intrusion impacts in downgradient residences and businesses. The New Jersey Department of Environmental Protection (“NJDEP”) has asserted, in a Directive and Notice to Insurers dated February 19, 2013 and again in an Amended Directive and Notice to Insurers dated January 13, 2014 (collectively the “Directives”), that the Company is liable for the downgradient impacts under a joint and severable liability theory. By letter dated April 23, 2015, NJDEP has demanded payment from the Company, and other parties, in the amount of approximately $296 thousand for costs incurred by NJDEP in connection with contamination downgradient of the property. The Company has contested, and will continue to contest, any such assertions due to the existence of other entities/sources of contamination, some of which are named in the Directives and the April 23, 2015 Demand, 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.

In July 2014, the Company received a subpoena from the District Attorney of the County of Alameda, along with other environmental prosecutorial offices in the state of California, seeking documents and information related to the handling, storage and disposal of hazardous waste. The Company is cooperating fully with the request and cannot predict the ultimate outcome of these efforts.

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.