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 6, 2012

OR

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission file number 0-20355

Costco Wholesale Corporation

(Exact name of registrant as specified in its charter)

Washington	91-1223280
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

999 Lake Drive, Issaquah, WA 98027

(Address of principal executive office)

(Zip Code)

(Registrant’s telephone number, including area code): (425) 313-8100

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

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T 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 definition of “large accelerated filer”, “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer  x	Accelerated filer   ¨
Non-accelerated filer  ¨ (Do not check if a smaller company)	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

The number of shares outstanding of the issuer’s common stock as of May 31, 2012 was 432,344,799

COSTCO WHOLESALE CORPORATION

INDEX TO FORM 10-Q

		Page
PART I	FINANCIAL INFORMATION
Item 1.	Financial Statements		3
	Condensed Consolidated Balance Sheets		3
	Condensed Consolidated Statements of Income		4
	Condensed Consolidated Statements of Cash Flows		5
	Notes to Condensed Consolidated Financial Statements		6
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations		20
Item 3.	Quantitative and Qualitative Disclosures About Market Risk		31
Item 4.	Controls and Procedures		31
PART II	OTHER INFORMATION
Item 1.	Legal Proceedings		32
Item 1A.	Risk Factors		32
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds		32
Item 3.	Defaults Upon Senior Securities		32
Item 4.	Mine Safety Disclosures		32
Item 5.	Other Information		32
Item 6.	Exhibits		33
	Exhibit 31.1 Rule 13(a) - 14(a) Certifications
	Exhibit 32.1 Section 1350 Certifications
Signatures			33

2

PART I—FINANCIAL INFORMATION

Item 1—Financial Statements.

COSTCO WHOLESALE CORPORATION

CONDENSED CONSOLIDATED BALANCE SHEETS

(dollars in millions, except par value and share data)

(unaudited)

	May 6, 2012			August 28, 2011
ASSETS
CURRENT ASSETS
Cash and cash equivalents	$	4,791		$	4,009
Short-term investments		1,185			1,604
Receivables, net		1,018			965
Merchandise inventories		7,044			6,638
Deferred income taxes and other current assets		553			490
Total current assets		14,591			13,706
PROPERTY AND EQUIPMENT
Land		3,950			3,819
Buildings and improvements		10,639			10,278
Equipment and fixtures		4,206			4,002
Construction in progress		244			269
		19,039			18,368
Less accumulated depreciation and amortization		(6,443	)		(5,936	)
Net property and equipment		12,596			12,432
OTHER ASSETS		649			623
TOTAL ASSETS	$	27,836		$	26,761
LIABILITIES AND EQUITY
CURRENT LIABILITIES
Accounts payable	$	7,302		$	6,544
Current portion of long-term debt		0			900
Accrued salaries and benefits		1,765			1,758
Accrued sales and other taxes		378			335
Other current liabilities		1,799			1,540
Deferred membership fees		1,122			973
Total current liabilities		12,366			12,050
LONG-TERM DEBT, excluding current portion		1,373			1,253
DEFERRED INCOME TAXES AND OTHER LIABILITIES		914			885
Total liabilities		14,653			14,188
COMMITMENTS AND CONTINGENCIES
EQUITY
Preferred stock $.005 par value; 100,000,000 shares authorized; no shares issued and outstanding		0			0
Common stock $.005 par value; 900,000,000 shares authorized; 433,243,000 and 434,266,000 shares issued and outstanding		2			2
Additional paid-in capital		4,653			4,516
Accumulated other comprehensive income		319			373
Retained earnings		7,611			7,111
Total Costco stockholders' equity		12,585			12,002
Noncontrolling interests		598			571
Total equity		13,183			12,573
TOTAL LIABILITIES AND EQUITY	$	27,836		$	26,761

The accompanying notes are an integral part of these condensed consolidated financial statements.

3

COSTCO WHOLESALE CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(dollars in millions, except per share data)

(unaudited)

	12 Weeks Ended						36 Weeks Ended
	May 6, 2012			May 8, 2011			May 6, 2012			May 8, 2011
REVENUE
Net sales	$	21,849		$	20,188		$	65,538		$	59,460
Membership fees		475			435			1,381			1,277
Total revenue		22,324			20,623			66,919			60,737
OPERATING EXPENSES
Merchandise costs		19,543			18,067			58,613			53,059
Selling, general and administrative		2,151			1,991			6,472			5,970
Preopening expenses		6			8			22			24
Provision for impaired assets, closing costs and other, net		1			1			2			7
Operating income		623			556			1,810			1,677
OTHER INCOME (EXPENSE)
Interest expense		(19	)		(27	)		(73	)		(80	)
Interest income and other, net		18			5			65			14
INCOME BEFORE INCOME TAXES		622			534			1,802			1,611
Provision for income taxes		217			193			657			569
Net income including noncontrolling interests		405			341			1,145			1,042
Net income attributable to noncontrolling interests		(19	)		(17	)		(45	)		(58	)
NET INCOME ATTRIBUTABLE TO COSTCO	$	386		$	324		$	1,100		$	984
NET INCOME PER COMMON SHARE ATTRIBUTABLE TO COSTCO:
Basic	$	0.89		$	0.74		$	2.53		$	2.26
Diluted	$	0.88		$	0.73		$	2.50		$	2.22
Shares used in calculation (000’s)
Basic		433,791			436,977			434,180			435,913
Diluted		439,166			443,570			439,748			442,727
CASH DIVIDENDS DECLARED PER COMMON SHARE	$	0.000		$	0.240		$	0.480		$	0.650

The accompanying notes are an integral part of these condensed consolidated financial statements.

4

COSTCO WHOLESALE CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(dollars in millions)

(unaudited)

	36 Weeks Ended
	May 6, 2012			May 8, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net income including noncontrolling interests	$	1,145		$	1,042
Adjustments to reconcile net income including noncontrolling interests to net cash provided by operating activities:
Depreciation and amortization		616			582
Stock-based compensation		179			152
Excess tax benefits on stock-based awards		(50	)		(43	)
Other non-cash operating activities, net		31			16
Deferred income taxes		(7	)		(22	)
Changes in operating assets and liabilities:
Increase in merchandise inventories		(434	)		(357	)
Increase in accounts payable		394			518
Other operating assets and liabilities, net		453			369
Net cash provided by operating activities		2,327			2,257
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of short-term investments		(1,324	)		(2,528	)
Maturities of short-term investments		1,414			1,474
Sales of investments		303			465
Additions to property and equipment		(900	)		(818	)
Proceeds from the sale of property and equipment		10			9
Increase resulting from initial consolidation of Costco Mexico		0			165
Other investing activities, net		(20	)		(5	)
Net cash used in investing activities		(517	)		(1,238	)
CASH FLOWS FROM FINANCING ACTIVITIES
Change in bank checks outstanding		412			35
Repayments of short-term borrowings		(114	)		(33	)
Proceeds from short-term borrowings		114			8
Proceeds from issuance of long-term debt		127			0
Repayments of long-term debt		(900	)		0
Proceeds from exercise of stock options		71			273
Minimum tax withholdings on stock-based awards		(107	)		(61	)
Excess tax benefits on stock-based awards		50			43
Repurchases of common stock		(452	)		(347	)
Cash dividend payments		(209	)		(179	)
Other financing activities, net		(3	)		(1	)
Net cash used in financing activities		(1,011	)		(262	)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS		(17	)		111
Net increase in cash and cash equivalents		782			868
CASH AND CASH EQUIVALENTS BEGINNING OF YEAR		4,009			3,214
CASH AND CASH EQUIVALENTS END OF PERIOD	$	4,791		$	4,082
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid during the first thirty-six weeks of year for:
Interest (reduced by $6 interest capitalized in both 2012 and 2011)	$	111		$	110
Income taxes	$	495		$	459
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Decrease in accrued property and equipment	$	51		$	53
Cash dividend declared, but not yet paid	$	0		$	105
Unsettled repurchases of common stock	$	13		$	0

The accompanying notes are an integral part of these condensed consolidated financial statements.

5

COSTCO WHOLESALE CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(dollars in millions, except share data)

(unaudited)

Note 1—Summary of Significant Policies

Basis of Presentation

Costco Wholesale Corporation and its subsidiaries operate membership warehouses that offer low prices on a limited selection of nationally branded and select private-label products in a wide range of merchandise categories in no-frills, self-service facilities. At May 6, 2012, Costco operated 602 warehouses worldwide, which included: 435 U.S. and Puerto Rico locations, 82 Canadian locations, 32 Mexico locations, 22 United Kingdom locations, 13 Japan locations, eight Taiwan locations, seven Korea locations, and three Australia locations. The Company also operates Costco Online, an electronic commerce web site, at www.costco.com and at www.costco.ca in Canada.

The accompanying condensed consolidated financial statements include the accounts of Costco Wholesale Corporation, a Washington corporation, its wholly-owned subsidiaries, subsidiaries in which it has a controlling interest, consolidated entities in which it has made equity investments or has other interests through which it has majority-voting control or exercises the right to direct the activities that most significantly impact the entity’s performance (Costco or the Company). The Company reports its noncontrolling interests in consolidated entities as a component of equity separate from the Company’s equity. All material inter-company transactions between the Company and its consolidated subsidiaries and other entities have been eliminated in consolidation. Unless otherwise noted, references to net income relate to net income attributable to Costco.

These unaudited condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q for interim financial reporting pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). While these statements reflect all normal recurring adjustments that are, in the opinion of management, necessary for fair presentation of the results of the interim period, they do not include all of the information and footnotes required by U.S. generally accepted accounting principles (GAAP) for complete financial statements. Therefore, the interim condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company’s annual report filed on Form 10-K for the fiscal year ended August 28, 2011.

In June 2009, the Financial Accounting Standards Board (FASB) issued amended guidance concerning whether a company’s variable interest(s) in an entity constitute a controlling financial interest. The Company adopted this guidance on August 30, 2010 (the beginning of its fiscal 2011). As a result, the Company determined that its 50%-owned joint venture, Costco Mexico (Mexico), would be consolidated on a prospective basis beginning August 30, 2010.

Fiscal Year End

The Company operates on a 52/53-week fiscal year basis with the fiscal year ending on the Sunday closest to August 31. Fiscal 2012 is a 53-week year ending on September 2, 2012. References to the third quarters of 2012 and 2011 relate to the 12-week fiscal quarters ended May 6, 2012 and May 8, 2011, respectively. References to the first thirty-six weeks of 2012 and 2011 relate to the thirty six-weeks ended May 6, 2012 and May 8, 2011, respectively.

6

Note 1—Summary of Significant Policies (Continued)

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates and assumptions.

Reclassifications

Certain reclassifications have been made to prior fiscal year amounts or balances to conform to the presentation in the current fiscal year. These reclassifications did not have a material impact on the Company’s previously reported condensed consolidated financial statements.

Fair Value of Financial Instruments

The carrying value of the Company’s financial instruments, including cash and cash equivalents, receivables and accounts payable, approximate fair value due to their short-term nature or variable interest rates. See Notes 2, 3, and 4 for the carrying value and fair value of the Company’s investments, derivative instruments, and fixed-rate debt.

The Company follows the authoritative guidance for fair value measurements relating to financial and nonfinancial assets and liabilities, including presentation of required disclosures. This guidance defines fair value as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants at the measurement date. The guidance also establishes a fair value hierarchy, which requires maximizing the use of observable inputs when measuring fair value. The three levels of inputs that may be used are:

Level 1:	Quoted market prices in active markets for identical assets or liabilities.
Level 2:	Observable market-based inputs or unobservable inputs that are corroborated by market data.
Level 3:	Significant unobservable inputs that are not corroborated by market data.

Our current financial liabilities have fair values that approximate their carrying values. Our long-term financial liabilities consist of long-term debt, which is reported on the balance sheet at issuance price less unamortized discount. There have been no material changes to the valuation techniques utilized in the fair value measurement of assets and liabilities as disclosed in the Company’s Form 10-K for the fiscal year ended August 28, 2011.

Merchandise Inventories

Merchandise inventories are valued at the lower of cost or market, as determined primarily by the retail inventory method, and are stated using the last-in, first-out (LIFO) method for substantially all U.S. merchandise inventories. Merchandise inventories for all foreign operations are primarily valued by the retail inventory method and are stated using the first-in, first-out (FIFO) method. The Company believes the LIFO method more fairly presents the results of operations by more closely matching current costs with current revenues. The Company records an adjustment each quarter, if necessary, for the projected annual effect of inflation or deflation, and these estimates are adjusted to actual results determined at year-end, when actual inflation rates and inventory levels have been determined. Due to net inflationary trends, merchandise inventories valued at LIFO were lower than FIFO resulting in a charge to merchandise costs of $6 and $9 in the third quarter and first thirty-six weeks of 2012,

7

Note 1—Summary of Significant Policies (Continued)

respectively, compared to charges of $49 and $55 in the third quarter and first thirty six-weeks of 2011, respectively. At May 6, 2012 and August 28, 2011, merchandise inventories valued at LIFO were lower than FIFO by $96 and $87, respectively.

Derivatives

The Company is exposed to foreign-currency exchange-rate fluctuations in the normal course of business. The Company manages these fluctuations, in part, through the use of forward foreign-exchange contracts, seeking to economically hedge the impact of fluctuations of foreign exchange on known future expenditures denominated in a non-functional foreign currency. The contracts are intended primarily to economically hedge exposure to U.S. dollar merchandise inventory expenditures made by the Company’s international subsidiaries whose functional currency is not the U.S. dollar. Currently, these contracts do not qualify for derivative hedge accounting. The Company seeks to mitigate risk with the use of these contracts and does not intend to engage in speculative transactions. These contracts do not contain any credit-risk-related contingent features. The aggregate notional amounts of forward foreign-exchange contracts were $226 and $221 at May 6, 2012, and May 8, 2011, respectively.

The Company seeks to manage counterparty risk associated with these contracts by limiting transactions to counterparties with which the Company has an established banking relationship. There can be no assurance, however, that this practice effectively mitigates counterparty risk. The contracts are limited to less than one year in duration. See Note 3 for information on the fair value of open, unsettled forward foreign-exchange contracts as of May 6, 2012, and May 8, 2011.

The following table summarizes the amount of unrealized gains or losses recognized in interest income and other, net in the accompanying condensed consolidated statements of income relating to the net changes in the fair value of open-unsettled forward foreign-exchange contracts:

	12 Weeks Ended					36 Weeks Ended
	May 6, 2012		May 8, 2011			May 6, 2012			May 8, 2011
Forward foreign-exchange contracts	$	1	$	(3	)	$	(2	)	$	(4	)

The Company is exposed to fluctuations in prices for the energy it consumes, particularly electricity and natural gas, which it seeks to partially mitigate through the use of fixed-price contracts for certain of its warehouses and other facilities, primarily in the U.S. and Canada. The Company also enters into variable-priced contracts for some purchases of natural gas, in addition to fuel for its gas stations, on an index basis. These contracts meet the characteristics of derivative instruments, but generally qualify for the “normal purchases or normal sales” exception under authoritative guidance and thus require no mark-to-market adjustment.

Foreign Currency

The Company recognizes foreign-currency transaction gains and losses related to revaluing all monetary assets and revaluing or settling monetary liabilities denominated in currencies other than the functional currency (generally the U.S. dollar cash and cash equivalents and the U.S. dollar payables of consolidated subsidiaries to their functional currency) in interest income and other, net in the accompanying condensed consolidated statements of income. Also included are realized foreign-currency gains or losses from all settlements of forward foreign-exchange contracts. These items resulted in a net gain of $2 and $25 in the third quarter and first thirty-six weeks of 2012, respectively, as compared to a net loss of $5 and $16 in the third quarter and first thirty-six weeks of 2011, respectively.

8

Note 1—Summary of Significant Policies (Continued)

Stock Repurchase Programs

Repurchased shares of common stock are retired, in accordance with the Washington Business Corporation Act. The par value of repurchased shares is deducted from common stock and the excess of repurchase price over par value is deducted from additional paid-in capital and retained earnings. See Note 5 for additional information.

Recently Adopted Accounting Pronouncements

In May 2011, the FASB issued guidance related to fair value measurement that changes the wording used to describe many requirements in GAAP for measuring and disclosing fair values. Additionally, the amendments clarify the application of existing fair value measurement requirements. The amended guidance is effective prospectively for interim and annual periods beginning after December 15, 2011. The Company adopted this guidance at the beginning of its third quarter of fiscal year 2012. Adoption of this guidance did not have a material impact on the Company’s consolidated financial statement disclosures.

Recent Accounting Pronouncements Not Yet Adopted

In June 2011, the FASB issued guidance that eliminates the option to report other comprehensive income and its components in the statement of changes in equity. Instead, an entity will be required to present either a continuous statement of net income and other comprehensive income or to present the information in two separate but consecutive statements. The new guidance must be applied retrospectively and is effective for fiscal years, and interim periods within those years, beginning after December 15, 2011. The Company plans to adopt this guidance at the beginning of its first quarter of fiscal 2013. Adoption of this guidance is not expected to have a material impact on the Company’s consolidated financial statements and will impact the financial statements’ presentation only. A portion of the new comprehensive income guidance required entities to present reclassification adjustments out of accumulated other comprehensive income by component in both the statement in which net income is presented and the statement in which other comprehensive income is presented. In December 2011, the FASB issued guidance which indefinitely defers the guidance related to the presentation of reclassification adjustments.

In September 2011, the FASB amended its guidance related to the disclosure requirements for employers subject to multi-employer pension plans. The amended guidance requires additional separate disclosures for multi-employer pension plans and other multi-employer post-retirement benefit plans. The amended guidance is effective for public entities for annual periods ending after December 15, 2011. The Company plans to adopt this guidance for its annual report on Form 10-K for its fiscal year 2012. Because the guidance only affects the annual disclosures required for multi-employer pension plans, it is not expected to have a material effect on the Company’s consolidated financial statements.

In September 2011, the FASB issued guidance to amend and simplify the rules related to testing goodwill for impairment. The revised guidance allows an initial qualitative evaluation, based on the entity’s events and circumstances, to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. The results of this qualitative assessment determine whether it is necessary to perform the currently required two-step impairment test. The new guidance is effective for annual and interim goodwill impairment tests performed for fiscal years beginning after December 15, 2011. Early adoption is permitted. Adoption of this guidance is not expected to have a material impact on the Company’s consolidated financial statements.

9

Note 2—Investments

The Company’s major categories of investments have not changed from the annual reporting period ended August 28, 2011. The Company’s investments at May 6, 2012 and August 28, 2011, were as follows:

May 6, 2012:	Cost Basis		Unrealized Gains		Recorded Basis
Available-for-sale:
U.S. government and agency securities	$	906	$	6	$	912
Corporate notes and bonds		59		0		59
FDIC-insured corporate bonds		100		1		101
Asset and mortgage-backed securities		9		0		9
Total available-for-sale		1,074		7		1,081
Held-to-maturity:
Certificates of deposit		104				104
Total short-term investments	$	1,178	$	7	$	1,185
August 28, 2011:	Cost Basis		Unrealized Gains		Recorded Basis
Available-for-sale:
U.S. government and agency securities	$	1,096	$	8	$	1,104
Corporate notes and bonds		6		1		7
FDIC-insured corporate bonds		208		1		209
Asset and mortgage-backed securities		12		0		12
Total available-for-sale		1,322		10		1,332
Held-to-maturity:
Certificates of deposit		272				272
Total short-term investments	$	1,594	$	10	$	1,604

Unrealized losses on the Company’s available-for-sale investments were not material as of May 6, 2012, and August 28, 2011, respectively. There were no gross unrealized gains and losses on cash equivalents at May 6, 2012, and August 28, 2011, respectively.

The proceeds from sales of available-for-sale securities during the third quarter and first thirty-six weeks of 2012 and 2011 are provided in the following table:

	12 Weeks Ended				36 Weeks Ended
	May 6, 2012		May 8, 2011		May 6, 2012		May 8, 2011
Proceeds	$	112	$	51	$	303	$	465

Gross realized gains or losses from sales of available-for-sale securities during the third quarter and first thirty-six weeks of 2012 were not material. As of May 6, 2012 and August 28, 2011, the Company’s available-for-sale securities that were in continuous unrealized-loss positions were not material.

10

Note 2—Investments (Continued)

The maturities of available-for-sale and held-to-maturity securities at May 6, 2012, were as follows:

	Available-For-Sale				Held-To-Maturity
	Cost Basis		Fair Value		Cost Basis		Fair Value
Due in one year or less .	$	785	$	786	$	104	$	104
Due after one year through five years		288		294		0		0
Due after five years .		1		1		0		0
	$	1,074	$	1,081	$	104	$	104

Note 3—Fair Value Measurement

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The tables below present information as of May 6, 2012, and August 28, 2011, respectively, regarding the Company’s financial assets and financial liabilities that are measured at fair value on a recurring basis, and indicate the level within the fair value hierarchy reflecting the valuation techniques utilized to determine such fair value. As of these dates, the Company’s holdings of level 3 financial assets and liabilities were immaterial.

May 6, 2012:	Level 1		Level 2
Money market mutual funds(1)	$	113	$	0
Investment in U.S. government and agency securities(2)		0		940
Investment in corporate notes and bonds(3)		0		69
Investment in FDIC-insured corporate bonds		0		101
Investment in asset and mortgage-backed securities		0		9
Forward foreign exchange contracts, in asset position(4)		0		0
Forward foreign exchange contracts, in (liability) position(4)		0		(3	)
Total	$	113	$	1,116

August 28, 2011:	Level 1		Level 2
Money market mutual funds(1)	$	200	$	0
Investment in U.S. government and agency securities(5)		0		1,177
Investment in corporate notes and bonds		0		7
Investment in FDIC-insured corporate bonds		0		209
Investment in asset and mortgage-backed securities		0		12
Forward foreign exchange contracts, in asset position(4)		0		1
Forward foreign exchange contracts, in (liability) position(4)		0		(2	)
Total	$	200	$	1,404

⁽¹⁾ Included in cash and cash equivalents in the accompanying condensed consolidated balance sheets.

⁽²⁾  $28 and $912 included in cash and cash equivalents and short-term investments, respectively, in the accompanying condensed consolidated balance sheets.

⁽³⁾  $10 and $59 included in cash and cash equivalents and short-term investments, respectively, in the accompanying condensed consolidated balance sheets.

⁽⁴⁾  The asset and the liability values are included in deferred income taxes and other current assets and other current liabilities, respectively, in the accompanying condensed consolidated balance sheets. See Note 1 for additional information on derivative instruments.

⁽⁵⁾  $73 and $1,104 included in cash and cash equivalents and short-term investments, respectively, in the accompanying condensed consolidated balance sheets.

11

Note 3—Fair Value Measurement (Continued)

Changes in fair value, including net transfers, of all financial assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the third quarter and first thirty-six weeks of 2012 and 2011 were immaterial. The Company reports transfers in and out of Levels 1, 2, and 3, as applicable, using the fair value of the individual securities as of the beginning of the reporting period in which the transfer(s) occurred. There were no transfers in or out of Level 1, 2, or 3 during the third quarter and first thirty-six weeks of 2012 and 2011.

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

Financial assets measured at fair value on a nonrecurring basis include held-to-maturity investments that are carried at amortized cost and are not remeasured to fair value on a recurring basis. There were no fair value adjustments to these financial assets measured during the third quarter and first thirty-six weeks of 2012 and 2011.

Nonfinancial assets measured at fair value on a nonrecurring basis include items such as long-lived assets that are measured at fair value resulting from an impairment, if deemed necessary. Fair value adjustments to these nonfinancial assets and liabilities during the third quarter and first thirty-six weeks of 2012 and 2011 were immaterial.

Note 4—Debt

In the first and second quarter of fiscal 2012, the Company’s Japanese subsidiary issued 1.18% yen-denominated promissory notes through a private placement. These notes were issued in two series, with the first funding in October 2011 and the second funding occurring in December 2011. For both series, interest is payable semi-annually, and principal is due in October 2018. The Company guarantees these notes.

On March 15, 2012, the Company paid the outstanding principal balance and associated interest on the 5.3% Senior Notes with its existing liquidity sources of cash and cash equivalents and short-term investments.

The carrying value and estimated fair value of the Company’s long-term debt consisted of the following:

	May 6, 2012				August 28, 2011
	Carrying Value		Fair Value		Carrying Value		Fair Value
5.5% Senior Notes due March 2017	$	1,097	$	1,324	$	1,097	$	1,314
5.3% Senior Notes due March 2012		0		0		900		924
2.695% Promissory Notes Due October 2017		81		90		85		94
1.18% Promissory Notes Due October 2018		125		128		0		0
Other long-term debt		70		110		71		103
Total long-term debt		1,373		1,652		2,153		2,435
Less current portion		0		0		900		924
Long-term debt, excluding current portion	$	1,373	$	1,652	$	1,253	$	1,511

The estimated fair value of the Company’s debt was based primarily on reported market values, recently completed market transactions and estimates based upon interest rates, maturities, and credit risk and is classified as Level 2 or Level 3 within the fair value hierarchy.

12

Note 5—Equity and Comprehensive Income

Dividends

On May 9, 2012, subsequent to the end of the third quarter, the Board of Directors declared a quarterly cash dividend in the amount of $0.275 per share, with a total $119 payable on June 8, 2012, to shareholders of record at the close of business on May 25, 2012. The Company’s dividend rate was $0.24 per share in the third quarter of 2011.

Stock Repurchase Programs

The Company’s stock repurchase activity during the third quarter and first thirty-six weeks of 2012 and 2011 is summarized in the following table:

	Shares Repurchased (000’s)		Average Price per Share		Total Cost
Third quarter of 2012		1,488	$	87.41	$	130
First thirty-six weeks of 2012		5,369		83.38		448
Third quarter of 2011		1,393	$	73.25	$	102
First thirty-six weeks of 2011		5,144		67.40		347

These amounts differ from the stock repurchase balances in the condensed consolidated statements of cash flows due to changes in unsettled stock repurchases at the end of the quarter. The remaining amount available for stock repurchases under the approved plans was $3,258 at May 6, 2012. Purchases are made from time-to-time, as conditions warrant, in the open market or in block purchases, and pursuant to plans under SEC Rule 10b5-1. Repurchased shares are retired.

Components of Equity and Comprehensive Income

The following tables show the changes in equity attributable to Costco and the noncontrolling interests of consolidated subsidiaries and other entities in which the Company has a controlling interest, but not a total ownership interest:

	Attributable to Costco			Noncontrolling Interests			Total Equity
Equity at August 28, 2011	$	12,002		$	571		$	12,573
Comprehensive income:
Unrealized loss on short-term investments, net of $1 tax		(2	)		0			(2	)
Foreign-currency translation adjustment and other		(52	)		(18	)		(70	)
Net income		1,100			45			1,145
Total comprehensive income		1,046			27			1,073
Stock-based compensation		179			0			179
Stock options exercised including tax effects		89			0			89
Release of vested restricted stock units (RSUs) including tax effects		(75	)		0			(75	)
Conversion of convertible notes		1			0			1
Repurchases of common stock		(448	)		0			(448	)
Cash dividends declared		(209	)		0			(209	)
Equity at May 6, 2012	$	12,585		$	598		$	13,183

13

Note 5—Equity and Comprehensive Income (Continued)

	Attributable to Costco			Noncontrolling Interests		Total Equity
Equity at August 29, 2010	$	10,829		$	101	$	10,930
Initial consolidation of noncontrolling interest in Costco Mexico		0			357		357
Comprehensive income:
Foreign-currency translation adjustment and other		362			62		424
Net income		984			58		1,042
Total comprehensive income		1,346			120		1,466
Stock-based compensation		152			0		152
Stock options exercised including tax effects		315			0		315
Release of vested RSUs including tax effects		(50	)		0		(50	)
Conversion of convertible notes		2			0		2
Repurchases of common stock		(347	)		0		(347	)
Cash dividends declared		(284	)		0		(284	)
Equity at May 8, 2011	$	11,963		$	578	$	12,541

The following table shows components of comprehensive income for the third quarter of 2012 and 2011:

	12 Weeks Ended
	May 6, 2012			May 8, 2011
Net income including noncontrolling interests	$	405		$	341
Unrealized gain/(loss) on short-term investments		(1	)		3
Foreign currency translation adjustment and other		6			161
Comprehensive income		410			505
Comprehensive (income) attributable to noncontrolling interests		(11	)		(37	)
Comprehensive income attributable to Costco	$	399		$	468

Note 6—Stock-Based Compensation Plans

Summary of Stock Option Activity

In the second quarter of fiscal 2012, the Fifth Restated 2002 Stock Incentive Plan was amended following shareholder approval and is now referred to as the Sixth Restated 2002 Stock Incentive Plan (Sixth Restated 2002 Plan). The Sixth Restated 2002 Plan authorizes the issuance of 16,000,000 shares (9,143,000 RSUs) of common stock for future grants in addition to shares authorized under the previous plan. Each RSU issued is counted as 1.75 shares toward the limit of shares available. The Company issues new shares of common stock upon exercise of stock options and vesting of RSUs.

The following table summarizes stock option transactions during the first thirty-six weeks of 2012:

	Number Of Options (in 000’s)			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in  years)		Aggregate Intrinsic Value(1)
Outstanding and exercisable at August 28, 2011		5,917		$	40.07
Exercised		(1,760	)		39.50
Outstanding and exercisable at May 6, 2012		4,157		$	40.31		2.30	$	179

(1) The difference between the exercise price and market value of common stock at May 6, 2012.

14

Note 6—Stock-Based Compensation Plans (Continued)

The tax benefits realized and intrinsic value related to total stock options exercised during the first thirty-six weeks of 2012 and 2011 are provided in the following table:

	36 Weeks Ended
	May 6, 2012		May 8, 2011
Actual tax benefit realized for stock options exercised	$	29	$	73
Intrinsic value of stock options exercised(1)	$	82	$	215

(1) The difference between the exercise price and market value of common stock measured at each individual exercise date.

Summary of Restricted Stock Unit Activity

At May 6, 2012, 14,300,000 shares were available to be granted as RSUs under the Sixth Restated 2002 Plan.

The following awards were outstanding at May 6, 2012:

• 8,617,000 shares of time-based RSUs that vest upon continued employment over specified periods of time;

• 398,000 performance-based RSUs granted to certain executive officers of the Company for which the performance targets have been met. Further restrictions lapse upon achievement of continued employment over specified periods of time; and

• 304,000 performance-based RSUs to be granted to executive officers of the Company upon achievement of specified performance targets for fiscal 2012, as determined by the Compensation Committee of the Board of Directors after the end of the fiscal year. These awards are included in the table below and the Company recognized compensation expense for these awards as it is currently deemed probable that the performance targets will be achieved.

The following table summarizes RSU transactions during the first thirty-six weeks of 2012:

	Number of Units (in 000’s)			Weighted- Average Grant Date Fair Value
Non-vested at August 28, 2011		9,727		$	57.56
Granted		3,593			81.44
Vested		(3,808	)		58.96
Forfeited		(193	)		65.97
Non-vested at May 6, 2012		9,319		$	65.61

15

Note 6—Stock-Based Compensation Plans (Continued)

Summary of Stock-Based Compensation

The following table summarizes stock-based compensation expense and the related tax benefits under the Company’s plans:

	12 Weeks Ended						36 Weeks Ended
	May 6, 2012			May 8, 2011			May 6, 2012			May 8, 2011
RSUs	$	45		$	43		$	179		$	151
Stock options		0			0			0			1
Total stock-based compensation expense before income taxes		45			43			179			152
Less recognized income tax benefit		(15	)		(14	)		(59	)		(49	)
Total stock-based compensation expense, net of income taxes	$	30		$	29		$	120		$	103

The remaining unrecognized compensation cost related to non-vested RSUs at May 6, 2012, was $488 and the weighted-average period of time over which this cost will be recognized is 1.8 years.

Note 7—Income Taxes

The Company’s reported effective income tax rates for the thirty-six weeks ended May 6, 2012, and May 8, 2011, were 36.4%, and 35.3%, respectively, in the accompanying condensed consolidated statements of income, which includes the net impact of discrete items. The Company’s current year consolidated provision for income taxes was adversely impacted by a net discrete tax expense of $23 relating primarily to two items: the adverse impact of an audit of Costco Mexico by the Mexican tax authority and the tax effects of nondeductible expenses for the Company’s contribution to an initiative reforming alcohol beverage laws in Washington State.

Note 8—Net Income Per Common and Common Equivalent Share

The following table shows the amounts used in computing net income per share and the effect on net income and the weighted average number of potentially dilutive shares of common stock (shares in 000’s):

	12 Weeks Ended				36 Weeks Ended
	May 6, 2012		May 8, 2011		May 6, 2012		May 8, 2011
Net income available to common stockholders used in basic and diluted net income per common share	$	386	$	324	$	1,100	$	984
Interest on convertible notes, net of tax		0		1		1		1
Net income available to common stockholders after assumed conversions of dilutive securities	$	386	$	325	$	1,101	$	985
Weighted average number of common shares used in basic net income per common share		433,791		436,977		434,180		435,913
Stock options and RSUs		4,532		5,693		4,713		5,887
Conversion of convertible notes		843		900		855		927
Weighted number of common shares and dilutive potential of common stock used in diluted net income per share		439,166		443,570		439,748		442,727
Anti-dilutive RSUs		0		0		0		8

16

Note 9—Commitments and Contingencies

The Company is involved in a number of claims, proceedings and litigation arising from its business and property ownership. In accordance with applicable accounting guidance, the Company establishes an accrual for legal proceedings if and when those matters reach a stage where they present loss contingencies that are both probable and reasonably estimable. In such cases, there may be a possible exposure to loss in excess of any amounts accrued. The Company monitors those matters for developments that would affect the likelihood of a loss and the accrued amount, if any, thereof, and adjusts the amount as appropriate. If the loss contingency at issue is not both probable and reasonably estimable, the Company does not establish an accrual, but will continue to monitor the matter for developments that will make the loss contingency both probable and reasonably estimable. As of the date of this report, except where specifically noted otherwise, the Company has not recorded an accrual related to any of the claims, proceedings or actions described herein, as the Company does not believe a material loss is probable. In each case, except where it is noted that a matter has been concluded, there is a reasonable possibility that a loss may be incurred. At this time, however, based on the status of each matter, the possible loss or range of loss cannot in our view be reasonably estimated because, among other things, (i) the remedies or penalties sought are indeterminate or unspecified, (ii) the legal and/or factual theories are not well developed; and/or (iii) the matters involve complex or novel legal theories or a large number of parties.

The Company is a defendant in the following matters, among others:

A case brought as a class action on behalf of certain present and former female managers, in which plaintiffs allege denial of promotion based on gender in violation of Title VII of the Civil Rights Act of 1964 and California state law. Shirley "Rae" Ellis v. Costco Wholesale Corp., United States District Court (San Francisco), Case No. C-04-3341-MHP. Plaintiffs seek compensatory damages, punitive damages, injunctive relief, interest and attorneys' fees. Class certification was granted by the district court on January 11, 2007. On September 16, 2011, the United States Court of Appeals for the Ninth Circuit reversed the order of class certification and remanded to the district court for further proceedings. The Company has filed a motion to deny class certification, and it is expected that plaintiffs will move for class certification.

Numerous putative class actions have been brought around the United States against motor fuel retailers, including the Company, alleging that they have been overcharging consumers by selling gasoline or diesel that is warmer than 60 degrees without adjusting the volume sold to compensate for heat-related expansion or disclosing the effect of such expansion on the energy equivalent received by the consumer. The Company is named in the following actions: Raphael Sagalyn, et al., v. Chevron USA, Inc., et al., Case No. 07-430 (D. Md.); Phyllis Lerner, et al., v. Costco Wholesale Corporation, et al., Case No. 07-1216 (C.D. Cal.); Linda A. Williams, et al., v. BP Corporation North America, Inc., et al., Case No. 07-179 (M.D. Ala.); James Graham, et al. v. Chevron USA, Inc., et al., Civil Action No. 07-193 (E.D. Va.); Betty A. Delgado, et al., v. Allsups, Convenience Stores, Inc., et al., Case No. 07-202 (D.N.M.); Gary Kohut, et al. v. Chevron USA, Inc., et al., Case No. 07-285 (D. Nev.); Mark Rushing, et al., v. Alon USA, Inc., et al., Case No. 06-7621 (N.D. Cal.); James Vanderbilt, et al., v. BP Corporation North America, Inc., et al., Case No. 06-1052 (W.D. Mo.); Zachary Wilson, et al., v. Ampride, Inc., et al., Case No. 06-2582 (D. Kan.); Diane Foster, et al., v. BP North America Petroleum, Inc., et al., Case No. 07-02059 (W.D. Tenn.); Mara Redstone, et al., v. Chevron USA, Inc., et al., Case No. 07-20751 (S.D. Fla.); Fred Aguirre, et al. v. BP West Coast Products LLC, et al., Case No. 07-1534 (N.D. Cal.); J.C. Wash, et al., v. Chevron USA, Inc., et al.; Case No. 4:07cv37 (E.D. Mo.); Jonathan Charles Conlin, et al., v. Chevron USA, Inc., et al.; Case No. 07 0317 (M.D. Tenn.); William Barker, et al. v. Chevron USA, Inc., et al.; Case No. 07-cv-00293 (D.N.M.); Melissa J. Couch, et al. v. BP Products North America, Inc., et al., Case No. 07cv291 (E.D. Tex.); S. Garrett Cook, Jr., et al., v. Hess Corporation, et al., Case No. 07cv750 (M.D. Ala.); Jeff Jenkins, et al. v. Amoco Oil Company, et al., Case No. 07-cv-00661 (D. Utah); and Mark Wyatt, et al., v. B. P. America Corp., et al., Case No. 07-1754 (S.D. Cal.). On June 18, 2007, the Judicial Panel on Multidistrict Litigation assigned the

17

Note 9—Commitments and Contingencies (Continued)

action, entitled In re Motor Fuel Temperature Sales Practices Litigation, MDL Docket No 1840, to Judge Kathryn Vratil in the United States District Court for the District of Kansas. On April 12, 2009, the Company agreed to settle the actions in which it is named as a defendant. Under the settlement, which is subject to final approval by the court, the Company agreed, to the extent allowed by law, to install over five years from the effective date of the settlement temperature-correcting dispensers in the States of Alabama, Arizona, California, Florida, Georgia, Kentucky, Nevada, New Mexico, North Carolina, South Carolina, Tennessee, Texas, Utah, and Virginia. Other than payments to class representatives, the settlement does not provide for cash payments to class members. On September 22, 2011, the court preliminarily approved a revised settlement, which did not materially alter the terms. On April 24, 2012, the court granted final approval of the revised settlement. A class member who objected has filed a notice of appeal from the order approving the settlement. Plaintiffs have moved for an award of $10 million in attorneys' fees, as well as an award of costs and payments to class representatives. The Company has opposed the motion.

On October 4, 2006, the Company received a grand jury subpoena from the United States Attorney's Office for the Central District of California, seeking records relating to the Company's receipt and handling of hazardous merchandise returned by Costco members and other records. The Company has entered into a tolling agreement with the United States Attorney's Office. On November 3, 2011, the Company was served with a subpoena for documents concerning the handling or disposal of any non-saleable hazardous products by or at any Company warehouse or distribution center. The subpoena is from the Office of the District Attorney of the County of San Joaquin in California and states that he has a "reasonable belief that [California] Business and Professions Code section 17200 may have been violated." A settlement was reached in this matter in May 2012, which obligates the Company to pay $2.6 in penalties and costs (for which an accrual was taken in the third quarter) and consent to an injunction regarding future compliance with all California hazardous waste laws. The settlement is subject to court approval.

The Environmental Protection Agency (EPA) issued an Information Request to the Company, dated November 1, 2007, regarding warehouses in the states of Arizona, California, Hawaii, and Nevada and relating to compliance with regulations concerning air-conditioning and refrigeration equipment. On March 4, 2009, the Company was advised by the Department of Justice that the Department was prepared to allege that the Company has committed at least nineteen violations of the leak-repair requirements of 40 C.F.R. § 82.156(i) and at least seventy-four violations of the recordkeeping requirements of 40 C.F.R. § 82.166(k), (m) at warehouses in these states. The Company has responded to these allegations, is engaged in communications with the Department about these and additional allegations, and has entered into tolling agreements. Substantial penalties may be levied for violations of the Clean Air Act. The Company is cooperating with this inquiry.

On October 7, 2009, the District Attorneys for San Diego, San Joaquin and Solano Counties filed a complaint, People of the State of California v. Costco Wholesale Corp., et al, No. 37-2009-00099912 (Superior Court for the County of San Diego), alleging on information and belief that the Company has violated and continues to violate provisions of the California Health and Safety Code and the Business and Professions Code through the use of certain spill clean-up materials at its gasoline stations. Relief sought includes, among other things, requests for preliminary and permanent injunctive relief, civil penalties, costs and attorneys' fees.

The Company has received notices from most states stating that they have appointed an agent to conduct an examination of the books and records of the Company to determine whether it has complied with state unclaimed property laws. In addition to seeking the turnover of unclaimed property subject to escheat laws, the states may seek interest, penalties, costs of examinations, and other relief. The State of Washington conducted such an examination on its own behalf and on February 4, 2011 issued an assessment. The Company filed suit on March 4, 2011, to contest the assessment.

18

Note 9—Commitments and Contingencies (Continued)

The Company does not believe that any pending claim, proceeding or litigation, either alone or in the aggregate, will have a material adverse effect on the Company's financial position; however, it is possible that an unfavorable outcome of some or all of the matters, however unlikely, could result in a charge that might be material to the results of an individual fiscal quarter.

Note 10—Segment Reporting

The Company and its subsidiaries are principally engaged in the operation of membership warehouses in the United States, Canada, the United Kingdom, Japan, Australia, through majority-owned subsidiaries in Taiwan and Korea, and its Mexico joint venture. The Company’s reportable segments are largely based on management’s organization of the operating segments for operational decisions and assessments of financial performance, which considers geographic locations. The material accounting policies of the segments are the same as described in the notes to the consolidated financial statements included in the Company’s annual report filed on Form 10-K for the fiscal year ended August 28, 2011, after considering newly adopted accounting pronouncements described elsewhere herein. All material inter-segment net sales and expenses have been eliminated in computing total revenue and operating income. Certain home office operating expenses are incurred on behalf of the Company’s Canadian and Other International Operations, but are included in the United States Operations because those costs are not allocated internally and generally come under the responsibility of the Company’s United States management team.

	United States Operations		Canadian Operations		Other International Operations		Total
Twelve Weeks Ended May 6, 2012
Total revenue	$	16,203	$	3,474	$	2,647	$	22,324
Operating income		356		157		110		623
Depreciation and amortization		150		25		27		202
Additions to property and equipment		196		23		49		268
Twelve Weeks Ended May 8, 2011
Total revenue	$	15,172	$	3,169	$	2,282	$	20,623
Operating income		310		143		103		556
Depreciation and amortization		145		28		23		196
Additions to property and equipment		192		24		62		278
Thirty-six Weeks Ended May 6, 2012
Total revenue	$	48,428	$	10,477	$	8,014	$	66,919
Operating income		1,046		436		328		1,810
Depreciation and amortization		460		79		77		616
Additions to property and equipment		628		110		162		900
Property and equipment, net		9,012		1,631		1,953		12,596
Total assets		19,121		4,065		4,650		27,836
Thirty-six Weeks Ended May 8, 2011
Total revenue	$	44,424	$	9,426	$	6,887	$	60,737
Operating income		934		419		324		1,677
Depreciation and amortization		435		80		67		582
Additions to property and equipment		613		86		119		818
Property and equipment, net		8,812		1,635		1,853		12,300
Total assets		19,157		3,712		4,105		26,974
Year Ended August 28, 2011
Total revenue	$	64,904	$	14,020	$	9,991	$	88,915
Operating income		1,395		621		423		2,439
Depreciation and amortization		640		117		98		855
Additions to property and equipment		876		144		270		1,290
Property and equipment, net		8,870		1,608		1,954		12,432
Total assets		18,558		3,741		4,462		26,761

19

Item 2—Management’s Discussion and Analysis of Financial Condition and Results of Operations (dollars in millions, except per share and membership fee data).

Forward-looking Statements

Certain statements contained in this Report constitute forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, and Section 21E of the Securities Exchange Act of 1934. They include statements that address activities, events, conditions or developments that we expect or anticipate may occur in the future and may relate to such matters as sales growth, increases in comparable store sales, cannibalization of existing locations by new openings, price or fee changes, earnings performance, earnings per share, stock-based compensation expense, warehouse openings and closures, the effect of adopting certain accounting standards, future financial reporting, financing, margins, return on invested capital, strategic direction, expense controls, membership renewal rates, shopping frequency, litigation impact and the demand for our products and services. Forward-looking statements may also be identified by the words “believe,” “project,” “expect,” “anticipate,” “estimate,” “intend,” “strategy,” “future,” “opportunity,” “plan,” “may,” “should,” “will,” “would,” “will be,” “will continue,” “will likely result,” and similar expressions. Such forward-looking statements involve risks and uncertainties that may cause actual events, results, or performance to differ materially from those indicated by such statements. These risks and uncertainties include, but are not limited to, domestic and international economic conditions, including exchange rates, the effects of competition and regulation, uncertainties in the financial markets, consumer and small business spending patterns and debt levels, conditions affecting the acquisition, development, ownership or use of real estate, actions of suppliers, rising costs associated with employees (including health care costs), energy and certain commodities, geopolitical conditions, and other risks identified from time to time in the Company’s public statements and reports filed with the SEC. Forward-looking statements speak only as of the date they are made, and we do not undertake to update these forward-looking statements, except as required by law. This management discussion should be read in conjunction with the management discussion included in our fiscal 2011 annual report on Form 10-K, previously filed with the SEC.

Overview

We operate membership warehouses based on the concept that offering our members low prices on a limited selection of nationally branded and select private-label products in a wide range of merchandise categories will produce high sales volumes and rapid inventory turnover. This turnover, when combined with the operating efficiencies achieved by volume purchasing, efficient distribution and reduced handling of merchandise in no-frills, self-service warehouse facilities, enables us to operate profitably at significantly lower gross margins (net sales less merchandise costs) than traditional wholesalers, mass merchandisers, supermarkets, and supercenters.

We believe that the most important driver of increasing our profitability is sales growth, particularly comparable sales growth (we measure and report comparable sales as sales in warehouses open for at least one year, including relocations, remodels, and expansions). Comparable sales growth is achieved through increasing the frequency with which our members shop and the amounts they spend on each visit. Sales comparisons can also be particularly influenced by two factors that are beyond our control, including fluctuations in currency exchange rates (with respect to the consolidation of the results of our international operations) and changes in the cost of gasoline and associated competitive conditions (primarily impacting domestic operations). The higher our comparable sales exclusive of currency fluctuations, the more we can leverage certain of our selling, general and administrative expenses, reducing them as a percentage of sales and enhancing profitability. Generating comparable sales growth is foremost a question of making available to our members the right merchandise at the right prices, a skill that we believe we have repeatedly demonstrated over the long term. Another sub-

20

Item 2—Management’s Discussion and Analysis of Financial Condition and Results of Operations (Continued) (dollars in millions, except per share and membership fee data).

stantial factor in sales growth is the health of the economies in which we do business, especially the United States. Sales growth and gross margins are also impacted by our competition, which is vigorous and widespread, including a wide range of global, national and regional wholesalers and retailers, including supermarkets, supercenter stores, and department and specialty stores, gasoline stations, and internet-based retailers. While we cannot control or reliably predict general economic health or changes in competition, we believe that we have been successful historically in adapting our business to these changes, such as through adjustments to our pricing and to our merchandise mix, including increasing the penetration of our private label items. Our philosophy is not to focus in the short term on maximizing prices that our members can be charged, but to maintain what we believe is a perception among our members of our “pricing authority” – consistently providing the most competitive values. This may cause us, for example, to absorb increases in merchandise costs at certain times rather than immediately passing them along to our members, negatively impacting gross margin.

We also achieve sales growth by opening new warehouses and relocating existing warehouses to larger and better-located facilities. As our warehouse base grows, available and desirable potential sites become more difficult to secure, and square footage growth becomes a comparatively less substantial component of growth. However, the negative aspects of such growth, including lower initial operating profitability relative to existing warehouses and cannibalization of sales at existing warehouses when openings occur in existing markets, are lessened. Our rate of square footage growth is higher in foreign markets, due to the smaller base in those markets, and we expect that to continue.

Our financial performance also depends heavily on our ability to control costs. While we believe that we have achieved successes in this area historically, some significant costs are partially outside our control, most particularly health care and utility expenses. With respect to expenses relating to the compensation of our employees, our philosophy is not to seek to minimize the wages and benefits that they earn. Rather, we believe that achieving our longer-term objectives of reducing employee turnover and enhancing employee satisfaction requires maintaining compensation levels that are better than the industry average for much of our workforce. This may cause us, for example, to absorb costs that other employers might seek to pass through to their workforces. Because our business is operated on very low margins, modest changes in various items in the income statement, particularly gross margin and selling, general and administrative expenses, can have substantial impacts on net income.

Our operating model is generally the same across our U.S., Canada, and Other International segments (see Item 1, Note 10 of this Report). Certain countries in the Other International segment have relatively higher rates of square footage growth, lower wage and benefits as a percentage of country sales, and/or less direct membership warehouse competition. Additionally, we operate our lower-margin gasoline business only in the United States and Canada.

In discussions of our consolidated operating results, we refer to the impact of changes in foreign currencies relative to the U.S. dollar, which are references to the differences between the foreign-exchange rates we use to convert the financial results of our international operations from local currencies into U.S. dollars for financial reporting purposes. This impact of foreign-exchange rate changes is typically calculated as the difference between the current period’s currency exchange rates and the comparable prior-year period’s currency exchange rates.

Our fiscal year ends on the Sunday closest to August 31. Fiscal 2012 is a 53-week year ending on September 2, 2012. References to the third quarters of 2012 and 2011 relate to the 12-week fiscal quarters ended May 6, 2012 and May 8, 2011, respectively. References to the first thirty-six weeks of 2012 and 2011 relate to the 36-weeks ended May 6, 2012 and May 8, 2011, respectively. Certain

21

Item 2—Management’s Discussion and Analysis of Financial Condition and Results of Operations (Continued) (dollars in millions, except per share and membership fee data).

percentages presented are calculated using actual results prior to rounding. Unless otherwise noted, references to net income relate to net income attributable to Costco.

Key items for the third quarter of 2012 as compared to the third quarter of 2011 include:

• Net sales increased 8.2% to $21,849, driven by a 5% increase in comparable sales and sales at the 20 net new warehouses opened since the end of the third quarter of fiscal 2011. Net sales were favorably impacted by increases in the price of gasoline, partially offset by the weakening of certain foreign currencies against the U.S dollar;

• Membership fees increased 8.9% to $475, primarily due to new member sign-ups at warehouses open for more than one year, the impact of raising our annual membership fees, additional member sign-ups at new warehouses opened since the end of the third quarter of fiscal 2011, and increased penetration of our higher-fee Executive Membership program;

• Gross margin as a percentage of net sales increased five basis points. The gross margin comparison was positively impacted 21 basis points due to a $6 LIFO inventory charge in the third quarter of 2012 compared to a $49 charge in the third quarter of 2011.

• Selling, general and administrative (SG&A) expenses as a percentage of net sales improved two basis points;

• Net income increased 19% to $386, or $0.88 per diluted share compared to $324, or $0.73 per diluted share in the third quarter of 2011;

• We repurchased 1,488,000 shares of our common stock, at an average cost of $87.41 per share, totaling approximately $130.

Results of Operations

Net Sales

	12 Weeks Ended						36 Weeks Ended
	May 6, 2012			May 8, 2011			May 6, 2012			May 8, 2011
Net sales	$	21,849		$	20,188		$	65,538		$	59,460
Increases in net sales:
U.S.		6.8	%		11.3	%		9.1	%		7.8	%
International		12.3	%		32.2	%(1)		13.3	%		29.8	%(1)
Total Company		8.2	%		16.1	%(1)		10.2	%		12.9	%(1)
Increases in comparable warehouse sales:
U.S.		5	%		10	%		7	%		6	%
International		5	%		18	%		8	%		15	%
Total Company		5	%		12	%		8	%		9	%
Increases in comparable warehouse sales excluding the impact of gasoline price inflation and foreign currencies:
U.S.		4	%		6	%		6	%		4	%
International		8	%		11	%		9	%		10	%
Total Company		5	%		7	%		7	%		6	%

(1) The percentage increase in net sales for the third quarter and first thirty-six weeks of 2011 from the comparable 2010 period was positively impacted by the initial consolidation of our Costco Mexico joint-venture (Mexico) beginning in fiscal 2011. Excluding Mexico, the International and total Company increases in net sales would have been 18.6% and 13.0%, respectively, for the third quarter of 2011 and 15.9% and 9.7%, respectively, for the first thirty-six weeks of 2011.

22

Item 2—Management’s Discussion and Analysis of Financial Condition and Results of Operations (Continued) (dollars in millions, except per share and membership fee data).

Net Sales

Net sales increased $1,661 or 8.2%, and $6,078 or 10.2% in the third quarter and first thirty-six weeks of 2012, respectively. These increases were attributable to an increase in comparable warehouse sales and sales at the 20 net new warehouses opened since the end of the third quarter of fiscal 2011.

Gasoline price inflation positively impacted net sales by approximately $141 or 70 basis points, and $789, or 133 basis points during the third quarter and first thirty-six weeks of 2012, respectively, which resulted from a 6% and 13% increase in the average sales price per gallon during the third quarter and first thirty-six weeks of 2012, respectively. Changes in foreign currencies relative to the U.S. dollar negatively impacted net sales by approximately $151, or 75 basis points, and $192, or 32 basis points during the third quarter and first thirty-six weeks of 2012, respectively. The negative impact in the third quarter of 2012 was primarily due to negative impacts in the exchange rates of the Canadian dollar and the Mexican peso of approximately $86 and $48, respectively. The negative impact in the first thirty-six weeks of 2012 was primarily due to negative impacts of the Mexican peso and the Canadian dollar of approximately $150 and $103, respectively, partially offset by a positive impact of the Japanese yen of approximately $76.

Comparable Sales

Comparable sales increased 5% and 8% in the third quarter and first thirty-six weeks of 2012, respectively, and were positively impacted by increases in both shopping frequency and the average amount spent by our members. Gasoline price inflation positively impacted comparable sales results during the third quarter and first thirty-six weeks of 2012, while changes in foreign currencies relative to the U.S. dollar negatively impacted comparable sales during the third quarter and first thirty-six weeks of 2012. The increase in comparable sales includes the negative impact of cannibalization (established warehouses losing sales to our newly opened locations).

Membership Fees

	12 Weeks Ended						36 Weeks Ended
	May 6, 2012			May 8, 2011			May 6, 2012			May 8, 2011
Membership fees	$	475		$	435		$	1,381		$	1,277
Membership fees as a percent of net sales		2.17	%		2.16	%		2.11	%		2.15	%
Total cardholders (000’s)		66,500			62,600			66,500			62,600

Membership fees increased 8.9% and 8.1% in the third quarter and first thirty-six weeks of 2012, respectively. The increase was due to new member sign-ups at warehouses open for more than one year, the impact of raising our annual membership fees, additional member sign-ups at new warehouses opened since the end of the third quarter of fiscal 2011, and increased penetration of our higher-fee Executive Membership program. Our member renewal rates are consistent with recent years, currently 89.6% in the U.S. and Canada, and 86.2% on a worldwide basis.

23

Item 2—Management’s Discussion and Analysis of Financial Condition and Results of Operations (Continued) (dollars in millions, except per share and membership fee data).

As previously reported, effective November 1, 2011, for new members, and January 1, 2012, for renewal members, we increased our annual membership fee. We account for membership fee revenue on a deferred basis, whereby revenue is recognized ratably over the one-year membership period. In the third quarter and first thirty-six weeks of 2012, these fee increases had a positive impact on membership fee revenues of $8 and $9, respectively, and will continue to have an increasing impact on the next several quarters.

Gross Margin

	12 Weeks Ended						36 Weeks Ended
	May 6, 2012			May 8, 2011			May 6, 2012			May 8, 2011
Net sales	$	21,849		$	20,188		$	65,538		$	59,460
Less merchandise costs		19,543			18,067			58,613			53,059
Gross margin	$	2,306		$	2,121		$	6,925		$	6,401
Gross margin as a percent of net sales		10.55	%		10.50	%		10.57	%		10.77	%

Gross margin as a percent of net sales increased five basis points compared to the third quarter of 2011. Gross margin for core merchandise categories (food and sundries, hardlines, softlines, and fresh foods) decreased 21 basis points, primarily due to decreases in food and sundries and hardlines margins resulting from our investment in merchandise pricing. Excluding the effect of gasoline price inflation on net sales, gross margin for core merchandise categories decreased 14 basis points. Gross margins in our warehouse ancillary and other businesses’ increased seven basis points as a percent of total net sales, primarily due to higher gross margins in our gasoline business. The gross margin comparison was also positively impacted by 21 basis points due to a $6 LIFO inventory charge in the third quarter 2012 compared to a $49 LIFO charge in the third quarter of 2011. Increased penetration of the Executive Membership 2% reward program negatively impacted gross margin by two basis points due to increased spending by Executive Members. Changes in foreign currencies relative to the U.S. dollar negatively impacted gross margin by approximately $17 in the third quarter of 2012.

Gross margin as a percent of net sales for the first thirty-six weeks of 2012 decreased 20 basis points compared to the first thirty-six weeks of 2011. Gross margin for the core merchandise categories decreased 26 basis points, primarily due to decreases in food and sundries, hardlines, and softlines. Excluding the effect of gasoline price inflation, gross margin for core merchandise categories decreased 14 basis points due to our investment in merchandise pricing. The gross margin comparison was positively impacted by eight basis points due to a $9 LIFO inventory charge in the first thirty-six weeks of 2012 compared to a $55 LIFO charge in the first thirty-six weeks of 2011. Increased penetration of the Executive Membership 2% reward program negatively affected gross margin by two basis points due to increased spending by Executive Members. Changes in foreign currencies relative to the U.S. dollar negatively impacted gross margin by approximately $20 for the first thirty-six weeks of 2012, primarily due to negative impacts of the Mexican peso of approximately $17.

Selling, General and Administrative Expenses

	12 Weeks Ended						36 Weeks Ended
	May 6, 2012			May 8, 2011			May 6, 2012			May 8, 2011
Selling, general and administrative (SG&A) expenses	$	2,151		$	1,991		$	6,472		$	5,970
SG&A expenses as a percent of net sales		9.84	%		9.86	%		9.88	%		10.04	%

24

Item 2—Management’s Discussion and Analysis of Financial Condition and Results of Operations (Continued) (dollars in millions, except per share and membership fee data).

SG&A expenses as a percent of net sales improved two basis points compared to the third quarter of 2011. Excluding the effect of gasoline price inflation, SG&A expenses increased five basis points, primarily due to increases in employee benefits, largely healthcare, and workers’ compensation expense. Higher costs related to the modernization of our information systems and related activities, which includes the re-platforming of our e-commerce site, also adversely impacted our SG&A percentage. Changes in foreign currencies relative to the U.S. dollar positively impacted SG&A expenses by approximately $13 in the third quarter of 2012.

SG&A expenses as a percent of net sales improved 16 basis points compared to the first thirty-six weeks of 2011. Excluding the effect of gasoline price inflation, SG&A expenses improved by four basis points, primarily due to a nine basis point improvement in our warehouse operating costs, largely payroll expenses. This improvement was partially offset by contributions to an initiative reforming alcohol beverage laws in Washington State and higher stock-based compensation expense, which had negative impacts of three basis points and two basis points, respectively. Changes in foreign currencies relative to the U.S. dollar positively impacted SG&A expenses by approximately $12 for the first thirty-six weeks of 2012.

Preopening Expenses

	12 Weeks Ended				36 Weeks Ended
	May 6, 2012		May 8, 2011		May 6, 2012		May 8, 2011
Preopening expenses	$	6	$	8	$	22	$	24
Warehouse openings, including relocations		4		1		10		11

Preopening expenses include costs incurred for startup operations related to new warehouses and the expansion of ancillary operations at existing warehouses. Preopening expenses vary due to the number of warehouse openings, the timing of an opening relative to our quarter end, whether the warehouse is owned or leased, and whether the opening is in an existing, new, or international market. The warehouse openings listed above for the third quarter and the first thirty-six weeks of 2012 exclude the reopening of our Tamasakai, Japan location, which was closed after the March 11, 2011, earthquake.

Provision for Impaired Assets, Closing Costs and Other, Net

	12 Weeks Ended				36 Weeks Ended
	May 6, 2012		May 8, 2011		May 6, 2012			May 8, 2011
Warehouse closing expenses	$	1	$	1	$	3		$	6
Impairment of long-lived assets		—		—		—			1
Net gains on sale of real property		—		—		(1	)		—
Provision for impaired assets, closing costs and other, net	$	1	$	1	$	2		$	7

This provision primarily includes costs related to: impairment of long-lived assets; future lease obligations, including contract termination costs of warehouses that have been closed or relocated to new facilities; and accelerated depreciation, based on the shortened useful life through the expected closing date, on buildings to be demolished or sold and that are not otherwise impaired.

25

Item 2—Management’s Discussion and Analysis of Financial Condition and Results of Operations (Continued) (dollars in millions, except per share and membership fee data).

Interest Expense

	12 Weeks Ended				36 Weeks Ended
	May 6, 2012		May 8, 2011		May 6, 2012		May 8, 2011
Interest expense	$	19	$	27	$	73	$	80

Interest expense primarily relates to our $900 of 5.3% and $1,100 of 5.5% Senior Notes issued in fiscal 2007. The $900 outstanding principal balance and associated interest on the 5.3% Senior Notes was paid on March 15, 2012 resulting in a decrease in interest expense for the third quarter and the first thirty-six weeks of 2012 compared to the third quarter and first thirty-six weeks of 2011. This debt was paid with existing sources of cash and cash equivalents and short-term investments.

Interest Income and Other, Net

	12 Weeks Ended					36 Weeks Ended
	May 6, 2012		May 8, 2011			May 6, 2012		May 8, 2011
Interest income	$	11	$	10		$	33	$	26
Foreign-currency transactions gains (losses), net		3		(8	)		23		(20	)
Other, net		4		3			9		8
Interest income and other, net	$	18	$	5		$	65	$	14

The increase in interest income, for both the third quarter and the first thirty-six weeks, was attributable to slightly higher interest rates in both time periods. The changes in foreign-currency transactions gains and losses, net in the third quarter and the first thirty-six weeks of 2012 compared to the third quarter and the first thirty-six weeks of 2011 were related to the revaluation or settlement of monetary assets and monetary liabilities, primarily our Canadian subsidiary’s U.S. dollar-denominated payables. See Derivatives and Foreign Currency sections in Item 1, Note 1 of this Report.

Provision for Income Taxes

	12 Weeks Ended						36 Weeks Ended
	May 6, 2012			May 8, 2011			May 6, 2012			May 8, 2011
Provision for income taxes	$	217		$	193		$	657		$	569
Effective tax rate		34.8	%		36.1	%		36.4	%		35.3	%

Our current year consolidated provision for income taxes for the first thirty-six weeks of fiscal 2012 was adversely impacted by a net discrete tax expense of $23 relating primarily to two items: the adverse impact of an audit of Costco Mexico by the Mexican tax authority and the tax effects of nondeductible expenses for the Company’s contribution to an initiative reforming alcohol beverage laws in Washington State.

26

Item 2—Management’s Discussion and Analysis of Financial Condition and Results of Operations (Continued) (dollars in millions, except per share and membership fee data).

Liquidity and Capital Resources (dollars in millions, except per share data)

Cash Flows

The following table itemizes components of our most liquid assets:

	May 6, 2012		August 28, 2011
Cash and cash equivalents	$	4,791	$	4,009
Short-term investments .		1,185		1,604
Total	$	5,976	$	5,613

Our primary sources of liquidity are cash flows generated from warehouse operations and cash and cash equivalents and short-term investments balances. Of these balances, approximately $1,106 and $982 at May 6, 2012, and August 28, 2011, respectively, represented debit and credit card receivables, primarily related to sales in the week prior to the end of our fiscal quarter or fiscal year.

Net cash provided by operating activities totaled $2,327 in the first thirty-six weeks of 2012, compared to $2,257 in the first thirty-six weeks of 2011, an increase of $70. This increase was primarily attributable to a $103 increase in net income including noncontrolling interests, an $84 increase in the change in other current operating assets and liabilities, a $34 increase in depreciation and amortization, and a $27 increase in stock-based compensation, partially offset by an increase in our net investment in merchandise inventories (merchandise inventories less accounts payable) of $201.

Net cash used in investing activities totaled $517 in the first thirty-six weeks of 2012 compared to $1,238 in the first thirty-six weeks of 2011, a decrease of $721. This decrease was primarily attributable to net cash provided by purchases, maturities and sales of investments of $393 in the first thirty-six weeks of 2012, compared to net cash used by these activities of $589 in the first thirty-six weeks of 2011, a difference of $982, which was in anticipation of the $900 repayment of long-term debt in the third quarter, described below. This was partially offset by an increase in cash in the first thirty-six weeks of 2011 of $165 resulting from the initial consolidation of Costco Mexico. Additionally, cash used for property and equipment additions increased $82 in the first thirty-six weeks of 2012 as compared to 2011.

Net cash used in financing activities totaled $1,011 in the first thirty-six weeks of 2012, compared to $262 in the first thirty-six weeks of 2011, an increase of $749. This increase was primarily attributable to the $900 repayment of our 5.3% Senior Notes on March 15, 2012. In addition, proceeds from the exercise of stock options decreased $202, and cash used for the repurchases of common stock increased $105. These items were partially offset by an increase in bank checks outstanding of $377 and from proceeds of $127 from the issuance of long-term debt by our Japanese subsidiary.

The effect of changes in foreign-exchange rates decreased cash and cash equivalents by $17 in the first thirty-six weeks of 2012, compared to an increase of $111 in the first thirty-six weeks of 2011, a decrease of $128.

Management believes that our current cash position and operating cash flows will be sufficient to meet our capital requirements for the foreseeable future. We have not provided for U.S. deferred taxes on cumulative undistributed earnings of certain non-U.S. consolidated subsidiaries and other entities, including our 50% owned investment in Mexico, as such earnings are deemed by us to be indefinitely reinvested. We have no current plans to repatriate the cash and cash equivalents and short-term

27

Item 2—Management’s Discussion and Analysis of Financial Condition and Results of Operations (Continued) (dollars in millions, except per share and membership fee data).

investments held by these subsidiaries for use in the U.S. We believe that our U.S. current assets position is sufficient to meet our U.S. liquidity requirements and intend to use subsidiary funds to expand operations within the international jurisdictions where the cash is currently held. At May 6, 2012, cash and cash equivalents and short-term investments totaling $2,226 were held by these non-U.S. consolidated subsidiaries and other entities.

Dividends

On May 9, 2012, subsequent to the end of the third quarter, our Board of Directors declared a quarterly cash dividend in the amount of $0.275 per share, with a total $119 payable on June 8, 2012 to shareholders of record at the close of business on May 25, 2012. Our current quarterly cash dividend rate is $0.275 per share, or $1.10 per share on an annualized basis as compared to $0.24 per share, or $0.96 on an annualized basis in the third quarter of 2011.

Expansion Plans

Our primary requirement for capital is the financing of land, building, and equipment costs for new and remodeled warehouses. To a lesser extent, capital is required for initial warehouse operations and working capital. While there can be no assurance that current expectations will be realized and plans are subject to change upon further review, it is our current intention to spend approximately $1,400 during fiscal 2012 for real estate, construction, remodeling, and equipment for warehouses and related operations. Through the end of the first thirty-six weeks of fiscal 2012, we have spent approximately $900.

We opened 11 new warehouses in the first thirty-six weeks of 2012, including the reopening of our Tamasakai, Japan warehouse (damaged in the March 2011 Japan earthquake), and the relocation of our Ancaster, Ontario warehouse to a larger and better-located facility. Our plans for the remainder of fiscal 2012 are to open up to 6 additional new warehouses.

28

Item 2—Management’s Discussion and Analysis of Financial Condition and Results of Operations (Continued) (dollars in millions, except per share and membership fee data).

Bank Credit Facilities

			Credit Line Activity at May 6, 2012
Entity	Credit Facility Description	Expiration Date	Total of all Credit Facilities		Stand-by Letter of Credit (LC) & Letter of Guaranty		Commercial LC		Available Credit		Applicable Interest Rate
U.S.	Uncommitted Standby LC	N/A	$	17	$	17	$	—	$	0		N/A
U.S.	Uncommitted Commercial LC	N/A		50		—		25		25		N/A
Australia(1)	Guarantee Line	N/A		10		2		—		8		N/A
Canada(1)(3)	Multi- Purpose Line	N/A		30		22		—		8		2.37	%
Japan(1)	Revolving Credit	March-13		44		—		—		44		0.58	%
Japan(1)	Bank Guaranty	March-13		19		19		—		0		N/A
Japan(1)	Revolving Credit	February-13		44		—		—		44		0.58	%
Japan(2)	Commercial LC	N/A		1		—		—		1		N/A
Korea(1)	Multi- Purpose Line	March-13		11		1		—		10		4.34	%
Mexico	Commercial LC	N/A		2		—		1		1		N/A
Mexico	Commercial LC	October-12		2		—		—		2		N/A
Taiwan	Multi- Purpose Line	January-13		24		6		1		17		2.88	%
Taiwan(4)	Multi- Purpose Line	July-12		17		4		—		13		2.87	%
United Kingdom	Uncommitted Money Market Line	N/A		32		—		—		32		3.20	%
United Kingdom	Uncommitted Overdraft Line	N/A		49		—		—		49		1.50	%
United Kingdom(2)	Letter of Guarantee	N/A		6		6		—		0		N/A
United Kingdom	Commercial LC	N/A		3		1		—		2		N/A
TOTAL			$	361	$	78	$	27	$	256

(1) The U.S. parent company, Costco Wholesale Corporation, guarantees this entity’s credit facility.

(2) Obligations under this facility are fully cash-collateralized by the subsidiary.

(3) The bank may cancel or restrict availability under this facility with 45-days written notice.

(4) We intend to renew this credit facility upon expiration.

We had credit facilities (for commercial and standby letters of credit) totaling $137 as of May 6, 2012. The outstanding commitments under these facilities totaled $105 at May 6, 2012, including $78 in standby letters of credit. For those entities with multi-purpose lines, any issuance of either letters of credit or short-term borrowings will result in a corresponding decrease in available credit.

29

Item 2—Management’s Discussion and Analysis of Financial Condition and Results of Operations (Continued) (dollars in millions, except per share and membership fee data).

Financing Activities

In the first and second quarter of fiscal 2012, our Japanese subsidiary issued 1.18% yen-denominated promissory notes through a private placement. These notes were issued in two series, with the first funding in October 2011 and the second funding in December 2011. For both series, interest is payable semi-annually, and principal is due in October 2018. We guarantee the payment of these notes.

On March 15, 2012, we paid the $900 outstanding principal balance and associated interest on the 5.3% Senior Notes with our existing liquidity sources of cash and cash equivalents and short-term investments.

Derivatives

We are exposed to foreign-currency exchange-rate fluctuations in the normal course of business. We manage these fluctuations, in part, through the use of forward foreign-exchange contracts, seeking to economically hedge the impact of fluctuations of foreign exchange on known future expenditures denominated in a non-functional foreign currency. The contracts are intended primarily to economically hedge our exposure to U.S. dollar merchandise inventory expenditures made by our international subsidiaries whose functional currency is other than the U.S. dollar. Currently, these contracts do not qualify for derivative hedge accounting. We seek to mitigate risk with the use of these contracts and do not intend to engage in speculative transactions. These contracts do not contain any credit-risk-related contingent features.

We seek to manage counterparty risk associated with these contracts by limiting transactions to counterparties with which we have established banking relationships. There can be no assurance, however, that this practice effectively mitigates counterparty risk. These contracts are limited to less than one year in duration. See Note 1 and Note 3 to the condensed consolidated financial statements included in Item 1 of this Report for additional information on the fair value of open, unsettled forward foreign-exchange contracts as of May 6, 2012, and August 28, 2011.

We are exposed to fluctuations in prices for energy that we consume, particularly electricity and natural gas, which we seek to partially mitigate through the use of fixed-price contracts for certain of our warehouses and other facilities, primarily in the U.S. and Canada. We also enter into variable-priced contracts for some purchases of natural gas, in addition to fuel for our gas stations, on an index basis. These contracts meet the characteristics of derivative instruments, but generally qualify for the “normal purchases or normal sales” exception under authoritative guidance, and thus require no mark-to-market adjustment.

Stock Repurchase Programs

In the third quarter of 2012 and 2011, we repurchased 1,488,000 and 1,393,000 shares of our common stock, at an average price of $87.41 and $73.25, totaling approximately $130 and $102, respectively. In the first thirty-six weeks of 2012 and 2011, we repurchased 5,369,000 and 5,144,000 shares of our common stock, at an average price of $83.38 and $67.40, for a total expenditure of $448 and $347, respectively. The remaining amount available for stock repurchases under our approved plan was $3,258 at May 6, 2012. Purchases are made from time-to-time, as conditions warrant, in the open market or in block purchases, and pursuant to plans under SEC Rule 10b5-1. Repurchased shares are retired, in accordance with the Washington Business Corporation Act.

30

Item 2—Management’s Discussion and Analysis of Financial Condition and Results of Operations (Continued) (dollars in millions, except per share and membership fee data).

Critical Accounting Policies

The preparation of our financial statements requires that we make estimates and judgments. We base our estimates on historical experience and on assumptions that we believe to be reasonable. Our critical accounting policies are discussed in Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations” section of our Annual Report on Form 10-K, for the fiscal year ended August 28, 2011. There have been no material changes to the critical accounting policies previously disclosed in that report.

Recent Accounting Pronouncements

See discussion of Recent Accounting Pronouncements in Note 1 to the condensed consolidated financial statements included in Item 1 of this Report.

Item 3—Quantitative and Qualitative Disclosures about Market Risk.

Our exposure to financial market risk results primarily from fluctuations in interest rates and foreign-currency exchange rates. There have been no material changes to our market risks as disclosed in our Annual Report on Form 10-K, for the fiscal year ended August 28, 2011.

Item 4—Controls and Procedures.

As of the end of the period covered by this Quarterly Report on Form 10-Q, we performed an evaluation under the supervision and with the participation of management, including our Chief Executive Officer and Chief Financial Officer, of our disclosure controls and procedures (as defined in Rules 13a-15(e) or 15d-15(e) under the Securities and Exchange Act of 1934 (the Exchange Act)). Based upon that evaluation, our Chief Executive Officer and Chief Financial Officer concluded that, as of the end of the period covered by this Quarterly Report, our disclosure controls and procedures are effective.

There has been no change in our internal control over financial reporting (as defined in Rules 13a-15(f) or 15d-15(f) of the Exchange Act) during our most recently completed fiscal quarter that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

31

PART II—OTHER INFORMATION

Item 1—Legal Proceedings.

See discussion of Legal Proceedings in Note 9 to the condensed consolidated financial statements included in Item 1 of this Report.

Item 1A—Risk Factors.

In addition to the other information set forth in this Quarterly Report on Form 10-Q, you should carefully consider the factors discussed in “Item 1A. Risk Factors” in our Annual Report on Form 10-K, for the fiscal year ended August 28, 2011. There have been no material changes in our risk factors from those disclosed in our Annual Report on Form 10-K.

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

The following table sets forth information on our common stock repurchase program activity for the third quarter of fiscal 2012 (dollars in millions, except per share data):

Period(1)	Total Number of Shares Purchased		Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Programs(2)		Maximum Dollar Value of Shares that May Yet be Purchased Under the Programs(2)
February 13, 2012 – March 11, 2012		303,000	$	84.43		303,000	$	3,363
March 12, 2012 – April 8, 2012		450,000		90.41		450,000		3,322
April 9, 2012 – May 6 , 2012		735,000		86.80		735,000		3,258
Total Third quarter		1,488,000	$	87.41		1,488,000

(1) Monthly information is presented by reference to our fiscal periods during the third quarter of fiscal 2012.

(2) Our stock repurchase program is conducted under a $4,000 authorization of our Board of Directors, approved in April 2011, which expires in April 2015.

Item 3—Defaults Upon Senior Securities.

None.

Item 4— Mine Safety Disclosures.

Not applicable.

Item 5—Other Information.

None.

32

Item 6—Exhibits.

(a) The following exhibits are included herein or incorporated by reference.

3.1	Articles of Incorporation of the Registrant(1)
3.2	Bylaws of the Registrant(2)
4.1	Registrant will furnish upon request copies of instruments defining the rights of holders of its long-term debt instruments
31.1	Rule 13(a) -14(a) Certifications
32.1	Section 1350 Certifications
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

(1) Incorporated by reference to the exhibits filed as part of the Current Report on Form 8-K filed by Costco Wholesale Corporation on August 30, 1999.

(2) Incorporated by reference to exhibits filed as part of the Current Report on Form 8-K filed by Costco Wholesale Corporation on August 24, 2010.

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.

	COSTCO WHOLESALE CORPORATION (Registrant)
June 6, 2012 Date	/S/     W. CRAIG JELINEK
	W. Craig Jelinek President and Chief Executive Officer
June 6, 2012 Date	/S/    RICHARD A. GALANTI
	Richard A. Galanti Executive Vice President and Chief Financial Officer

33

EX-31.1

Exhibit 31.1

CERTIFICATIONS

I, W. Craig Jelinek, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Costco Wholesale Corporation (“the 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.

Date: June 6, 2012

/S/    W. CRAIG JELINEK        

W. Craig Jelinek

President and Chief Executive Officer

CERTIFICATIONS

I, Richard A. Galanti, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Costco Wholesale Corporation (“the 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.

Date: June 6, 2012

/S/    RICHARD A. GALANTI      

Richard A. Galanti

Executive Vice President and Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION

In connection with the Quarterly Report of Costco Wholesale Corporation (the “Company”) on Form 10-Q for the quarter ended May 6, 2012 (the “Report”), I, W. Craig Jelinek , President and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. § 1350, that:

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

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

/S/    W. CRAIG JELINEK	Date: June 6, 2012
W. Craig Jelinek President and Chief Executive Officer

A signed original of this written statement has been provided to and will be retained by Costco Wholesale Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

CERTIFICATION

In connection with the Quarterly Report of Costco Wholesale Corporation (the “Company”) on Form 10-Q for the quarter ended May 6, 2012 (the “Report”), I, Richard A. Galanti, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. § 1350, that:

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

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

/S/    RICHARD A. GALANTI	Date: June 6, 2012
Richard A. Galanti Executive Vice President and Chief Financial Officer

A signed original of this written statement has been provided to and will be retained by Costco Wholesale Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

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Changes in Equity Attributable to Costco and Noncontrolling Interests of Consolidated Subsidiaries and Other Entities (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	May 06, 2012
Equity And Comprehensive Income [Line Items]
Unrealized gain/(loss) on short-term investments, tax	$ 1

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Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	May 06, 2012
Loss Contingencies [Line Items]
Damages sought	$ 10
Loss contingency accrual carrying value provision	$ 2.6

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Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	May 06, 2012	May 08, 2011
Income Taxes [Line Items]
Effective tax rates	36.40%	35.30%
Discrete tax expense (benefit)	$ 23

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Debt - Additional Information (Detail)	9 Months Ended
	May 06, 2012
1.18% Fixed-rate Note Due October 2018
Debt Instrument [Line Items]
Loan interest rate, fixed	1.18%
Debt instrument, principal due date	2018-10
5.3% Senior Notes due March 2012
Debt Instrument [Line Items]
Loan interest rate, fixed	5.30%
Debt instrument, principal due date	2012-03

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Segment Reporting (Tables)

9 Months Ended

May 06, 2012

Segment Reporting Information, by Segment

The Company and its subsidiaries are principally engaged in the operation of membership warehouses in the United States, Canada, the United Kingdom, Japan, Australia, through majority-owned subsidiaries in Taiwan and Korea, and its Mexico joint venture. The Company’s reportable segments are largely based on management’s organization of the operating segments for operational decisions and assessments of financial performance, which considers geographic locations. The material accounting policies of the segments are the same as described in the notes to the consolidated financial statements included in the Company’s annual report filed on Form 10-K for the fiscal year ended August 28, 2011, after considering newly adopted accounting pronouncements described elsewhere herein. All material inter-segment net sales and expenses have been eliminated in computing total revenue and operating income. Certain home office operating expenses are incurred on behalf of the Company’s Canadian and Other International Operations, but are included in the United States Operations because those costs are not allocated internally and generally come under the responsibility of the Company’s United States management team.

	United States Operations		Canadian Operations		Other International Operations		Total
Twelve Weeks Ended May 6, 2012
Total revenue	$	16,203	$	3,474	$	2,647	$	22,324
Operating income		356		157		110		623
Depreciation and amortization		150		25		27		202
Additions to property and equipment		196		23		49		268
Twelve Weeks Ended May 8, 2011
Total revenue	$	15,172	$	3,169	$	2,282	$	20,623
Operating income		310		143		103		556
Depreciation and amortization		145		28		23		196
Additions to property and equipment		192		24		62		278
Thirty-six Weeks Ended May 6, 2012
Total revenue	$	48,428	$	10,477	$	8,014	$	66,919
Operating income		1,046		436		328		1,810
Depreciation and amortization		460		79		77		616
Additions to property and equipment		628		110		162		900
Property and equipment, net		9,012		1,631		1,953		12,596
Total assets		19,121		4,065		4,650		27,836
Thirty-six Weeks Ended May 8, 2011
Total revenue	$	44,424	$	9,426	$	6,887	$	60,737
Operating income		934		419		324		1,677
Depreciation and amortization		435		80		67		582
Additions to property and equipment		613		86		119		818
Property and equipment, net		8,812		1,635		1,853		12,300
Total assets		19,157		3,712		4,105		26,974
Year Ended August 28, 2011
Total revenue	$	64,904	$	14,020	$	9,991	$	88,915
Operating income		1,395		621		423		2,439
Depreciation and amortization		640		117		98		855
Additions to property and equipment		876		144		270		1,290
Property and equipment, net		8,870		1,608		1,954		12,432
Total assets		18,558		3,741		4,462		26,761

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Summary Stock Option Transactions (Detail) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	9 Months Ended
	May 06, 2012 Year
Number of options
Number of options outstanding and exercisable at beginning balance	5,917
Exercised	(1,760)
Number of options outstanding and exercisable at ending balance	4,157
Weighted- average exercise price
Weighted- average exercise price beginning Balance	$ 40.07
Exercised	$ 39.5
Weighted- average exercise price ending balance	$ 40.31
Weighted-average remaining contractual term
Weighted-average remaining contractual term (in years)	2.3
Aggregate intrinsic value
Aggregate intrinsic value	$ 179	[1]

[1] The difference between the exercise price and market value of common stock at May 6, 2012.

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Stock Repurchase Activity (Detail) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	May 06, 2012	May 08, 2011	May 06, 2012	May 08, 2011
Stock Repurchase Program [Line Items]
Shares Repurchased	1,488	1,393	5,369	5,144
Average Price per Share	$ 87.41	$ 73.25	$ 83.38	$ 67.40
Total Cost	$ 130	$ 102	$ 448	$ 347

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Schedule of Earnings Per Share Effect on Net Income and Weighted Average Number of Dilutive Potential Common Stock (Detail) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	May 06, 2012	May 08, 2011	May 06, 2012	May 08, 2011
Earnings Per Share [Line Items]
Net income available to common stockholders used in basic and diluted net income per common share	$ 386	$ 324	$ 1,100	$ 984
Interest on convertible notes, net of tax	0	1	1	1
Net income available to common stockholders after assumed conversions of dilutive securities	$ 386	$ 325	$ 1,101	$ 985
Weighted average number of common shares used in basic net income per common share	433,791	436,977	434,180	435,913
Stock options and RSUs	4,532	5,693	4,713	5,887
Conversion of convertible notes	843	900	855	927
Weighted number of common shares and dilutive potential of common stock used in diluted net income per share	439,166	443,570	439,748	442,727
Anti-dilutive RSUs	0	0	0	8

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Fair Value Measurement

9 Months Ended

May 06, 2012

Fair Value Measurement

Note 3—Fair Value Measurement

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The tables below present information as of May 6, 2012, and August 28, 2011, respectively, regarding the Company’s financial assets and financial liabilities that are measured at fair value on a recurring basis, and indicate the level within the fair value hierarchy reflecting the valuation techniques utilized to determine such fair value. As of these dates, the Company’s holdings of level 3 financial assets and liabilities were immaterial.

May 6, 2012:	Level 1		Level 2
Money market mutual funds(1)	$	113	$	0
Investment in U.S. government and agency securities(2)		0		940
Investment in corporate notes and bonds(3)		0		69
Investment in FDIC-insured corporate bonds		0		101
Investment in asset and mortgage-backed securities		0		9
Forward foreign exchange contracts, in asset position(4)		0		0
Forward foreign exchange contracts, in (liability) position(4)		0		(3	)
Total	$	113	$	1,116

August 28, 2011:	Level 1		Level 2
Money market mutual funds(1)	$	200	$	0
Investment in U.S. government and agency securities(5)		0		1,177
Investment in corporate notes and bonds		0		7
Investment in FDIC-insured corporate bonds		0		209
Investment in asset and mortgage-backed securities		0		12
Forward foreign exchange contracts, in asset position(4)		0		1
Forward foreign exchange contracts, in (liability) position(4)		0		(2	)
Total	$	200	$	1,404

⁽¹⁾ Included in cash and cash equivalents in the accompanying condensed consolidated balance sheets.

⁽²⁾  $28 and $912 included in cash and cash equivalents and short-term investments, respectively, in the accompanying condensed consolidated balance sheets.

⁽³⁾  $10 and $59 included in cash and cash equivalents and short-term investments, respectively, in the accompanying condensed consolidated balance sheets.

⁽⁴⁾  The asset and the liability values are included in deferred income taxes and other current assets and other current liabilities, respectively, in the accompanying condensed consolidated balance sheets. See Note 1 for additional information on derivative instruments.

⁽⁵⁾  $73 and $1,104 included in cash and cash equivalents and short-term investments, respectively, in the accompanying condensed consolidated balance sheets.

Changes in fair value, including net transfers, of all financial assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the third quarter and first thirty-six weeks of 2012 and 2011 were immaterial. The Company reports transfers in and out of Levels 1, 2, and 3, as applicable, using the fair value of the individual securities as of the beginning of the reporting period in which the transfer(s) occurred. There were no transfers in or out of Level 1, 2, or 3 during the third quarter and first thirty-six weeks of 2012 and 2011.

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

Financial assets measured at fair value on a nonrecurring basis include held-to-maturity investments that are carried at amortized cost and are not remeasured to fair value on a recurring basis. There were no fair value adjustments to these financial assets measured during the third quarter and first thirty-six weeks of 2012 and 2011.

Nonfinancial assets measured at fair value on a nonrecurring basis include items such as long-lived assets that are measured at fair value resulting from an impairment, if deemed necessary. Fair value adjustments to these nonfinancial assets and liabilities during the third quarter and first thirty-six weeks of 2012 and 2011 were immaterial.

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Tax Benefits Realized and Intrinsic Value Related to Stock Options Exercised (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	May 06, 2012		May 08, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Actual tax benefit realized for stock options exercised	$ 29		$ 73
Intrinsic value of stock options exercised	$ 82	[1]	$ 215	[1]

[1] The difference between the exercise price and market value of common stock measured at each individual exercise date.

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Proceeds from Sales of Available for Sale Securities (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	May 06, 2012	May 08, 2011	May 06, 2012	May 08, 2011
Schedule of Available-for-sale Securities [Line Items]
Proceeds	$ 112	$ 51	$ 303	$ 465

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Available for Sale and Held to Maturity Investments (Detail) (USD $) In Millions, unless otherwise specified	May 06, 2012	Aug. 28, 2011
Available for Sale and Held to Maturity [Line Items]
Available-for-sale debt maturities, cost basis	$ 1,074
Unrealized gains	7	10
Held-to-maturity, cost basis	104
Total available-for-sale, recorded basis	1,081
Total short-term investments, recorded basis	1,185	1,604
Total short-term investments, cost basis	1,178	1,594
Held-to-maturity, recorded basis	104
U.S. Government and Agency Securities
Available for Sale and Held to Maturity [Line Items]
Available-for-sale debt maturities, cost basis	906	1,096
Unrealized gains	6	8
Total available-for-sale, recorded basis	912	1,104
Corporate Notes and Bonds
Available for Sale and Held to Maturity [Line Items]
Available-for-sale debt maturities, cost basis	59	6
Unrealized gains	0	1
Total available-for-sale, recorded basis	59	7
FDIC-Insured Corporate Bonds
Available for Sale and Held to Maturity [Line Items]
Available-for-sale debt maturities, cost basis	100	208
Unrealized gains	1	1
Total available-for-sale, recorded basis	101	209
Asset and Mortgage Backed Securities
Available for Sale and Held to Maturity [Line Items]
Available-for-sale debt maturities, cost basis	9	12
Unrealized gains	0	0
Total available-for-sale, recorded basis	9	12
Available-for-sale Securities
Available for Sale and Held to Maturity [Line Items]
Available-for-sale debt maturities, cost basis	1,074	1,322
Unrealized gains	7	10
Total available-for-sale, recorded basis	1,081	1,332
Held-to-maturity Securities | Certificates of Deposit
Available for Sale and Held to Maturity [Line Items]
Held-to-maturity, cost basis	104	272
Held-to-maturity, recorded basis	$ 104	$ 272

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Summary of RSU Transactions (Detail) (Restricted Stock Units (RSUs), USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
	May 06, 2012
Restricted Stock Units (RSUs)
Number of units
Non-vested Beginning Balance	9,727
Granted	3,593
Vested	(3,808)
Forfeited	(193)
Non-vested Ending Balance	9,319
Weighted average grant date fair value
Non-vested Beginning Balance	$ 57.56
Granted	$ 81.44
Vested	$ 58.96
Forfeited	$ 65.97
Non-vested Ending Balance	$ 65.61

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Maturities of Available for Sale and Held to Maturity Securities (Detail) (USD $) In Millions, unless otherwise specified	May 06, 2012
Available-For-Sale, Cost Basis
Available-For-Sale, Cost Basis due in one year or less	$ 785
Available-For-Sale, Cost Basis due after one year through five years	288
Available-For-Sale, Cost Basis due after five years	1
Available-For-Sale, Cost Basis, total	1,074
Available-For-Sale, Fair Value
Available-For-Sale, Fair Value due in one year or less	786
Available-For-Sale, Fair Value due after one year through five years	294
Available-For-Sale, Fair Value due after five years	1
Available-For-Sale, Fair Value, total	1,081
Held-To-Maturity, Cost Basis
Held-To-Maturity, Cost Basis due in one year or less	104
Held-To-Maturity, Cost Basis due after one year through five years	0
Held-To-Maturity, Cost Basis due after five years	0
Held-To-Maturity, Cost Basis, total	104
Held-To-Maturity, Fair Value
Held-To-Maturity, Fair Value due in one year or less	104
Held-To-Maturity, Fair Value due after one year through five years	0
Held-To-Maturity, Fair Value due after five years	0
Held-To-Maturity, Fair Value, total	$ 104

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Fair Value of Financial Assets and Financial Liabilities Measured on Recurring Basis (Detail) (Fair Value, Measurements, Recurring, USD $) In Millions, unless otherwise specified	May 06, 2012		Aug. 28, 2011
Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of assets measured on recurring basis	$ 113		$ 200
Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of assets measured on recurring basis	1,116		1,404
U.S. Government and Agency Securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of assets measured on recurring basis	0	[1]	0	[2]
U.S. Government and Agency Securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of assets measured on recurring basis	940	[1]	1,177	[2]
Money Market Mutual Funds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of assets measured on recurring basis	113	[3]	200	[3]
Money Market Mutual Funds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of assets measured on recurring basis	0	[3]	0	[3]
Corporate Notes and Bonds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of assets measured on recurring basis	0	[4]	0
Corporate Notes and Bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of assets measured on recurring basis	69	[4]	7
FDIC-Insured Corporate Bonds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of assets measured on recurring basis	0		0
FDIC-Insured Corporate Bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of assets measured on recurring basis	101		209
Asset and Mortgage-Backed Securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of assets measured on recurring basis	0		0
Asset and Mortgage-Backed Securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of assets measured on recurring basis	9		12
Forward Foreign Exchange Contracts | Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of assets measured on recurring basis	0	[5]	0	[5]
Fair value of liabilities measured on recurring basis	0	[5]	0	[5]
Forward Foreign Exchange Contracts | Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of assets measured on recurring basis	0	[5]	1	[5]
Fair value of liabilities measured on recurring basis	$ (3)	[5]	$ (2)	[5]

[1] $28 and $912 included in cash and cash equivalents and short-term investments, respectively, in the accompanying condensed consolidated balance sheets.

[2] $73 and $1,104 included in cash and cash equivalents and short-term investments, respectively, in the accompanying condensed consolidated balance sheets.

[3] Included in cash and cash equivalents in the accompanying condensed consolidated balance sheets.

[4] $10 and $59 included in cash and cash equivalents and short-term investments, respectively, in the accompanying condensed consolidated balance sheets.

[5] The asset and the liability values are included in deferred income taxes and other current assets and other current liabilities, respectively, in the accompanying condensed consolidated balance sheets. See Note 1 for additional information on derivative instruments.

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Investments

9 Months Ended

May 06, 2012

Investments

Note 2—Investments

The Company’s major categories of investments have not changed from the annual reporting period ended August 28, 2011. The Company’s investments at May 6, 2012 and August 28, 2011, were as follows:

May 6, 2012:	Cost Basis		Unrealized Gains		Recorded Basis
Available-for-sale:
U.S. government and agency securities	$	906	$	6	$	912
Corporate notes and bonds		59		0		59
FDIC-insured corporate bonds		100		1		101
Asset and mortgage-backed securities		9		0		9
Total available-for-sale		1,074		7		1,081
Held-to-maturity:
Certificates of deposit		104				104
Total short-term investments	$	1,178	$	7	$	1,185
August 28, 2011:	Cost Basis		Unrealized Gains		Recorded Basis
Available-for-sale:
U.S. government and agency securities	$	1,096	$	8	$	1,104
Corporate notes and bonds		6		1		7
FDIC-insured corporate bonds		208		1		209
Asset and mortgage-backed securities		12		0		12
Total available-for-sale		1,322		10		1,332
Held-to-maturity:
Certificates of deposit		272				272
Total short-term investments	$	1,594	$	10	$	1,604

Unrealized losses on the Company’s available-for-sale investments were not material as of May 6, 2012, and August 28, 2011, respectively. There were no gross unrealized gains and losses on cash equivalents at May 6, 2012, and August 28, 2011, respectively.

The proceeds from sales of available-for-sale securities during the third quarter and first thirty-six weeks of 2012 and 2011 are provided in the following table:

	12 Weeks Ended				36 Weeks Ended
	May 6, 2012		May 8, 2011		May 6, 2012		May 8, 2011
Proceeds	$	112	$	51	$	303	$	465

Gross realized gains or losses from sales of available-for-sale securities during the third quarter and first thirty-six weeks of 2012 were not material. As of May 6, 2012 and August 28, 2011, the Company’s available-for-sale securities that were in continuous unrealized-loss positions were not material.

The maturities of available-for-sale and held-to-maturity securities at May 6, 2012, were as follows:

	Available-For-Sale				Held-To-Maturity
	Cost Basis		Fair Value		Cost Basis		Fair Value
Due in one year or less .	$	785	$	786	$	104	$	104
Due after one year through five years		288		294		0		0
Due after five years .		1		1		0		0
	$	1,074	$	1,081	$	104	$	104

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Fair Value of Financial Assets and Financial Liabilities Measured on Recurring Basis (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	May 06, 2012	Aug. 28, 2011	May 08, 2011	Aug. 29, 2010
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash and cash equivalents	$ 4,791	$ 4,009	$ 4,082	$ 3,214
Short-term investments	1,185	1,604
U.S. Government and Agency Securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash and cash equivalents	28	73
Short-term investments	912	1,104
Corporate Notes and Bonds | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash and cash equivalents	10
Short-term investments	$ 59

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Components of Comprehensive Income (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	May 06, 2012	May 08, 2011	May 06, 2012	May 08, 2011
Comprehensive Income (Loss) [Line Items]
Net income including noncontrolling interests	$ 405	$ 341	$ 1,145	$ 1,042
Unrealized gain/(loss) on short-term investments	(1)	3	(2)
Foreign currency translation adjustment and other	6	161	(70)	424
Comprehensive income	410	505	1,073	1,466
Comprehensive (income) attributable to noncontrolling interests	(11)	(37)
Comprehensive income attributable to Costco	$ 399	$ 468

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CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	May 06, 2012	Aug. 28, 2011
CURRENT ASSETS
Cash and cash equivalents	$ 4,791	$ 4,009
Short-term investments	1,185	1,604
Receivables, net	1,018	965
Merchandise inventories	7,044	6,638
Deferred income taxes and other current assets	553	490
Total current assets	14,591	13,706
PROPERTY AND EQUIPMENT
Land	3,950	3,819
Buildings and improvements	10,639	10,278
Equipment and fixtures	4,206	4,002
Construction in progress	244	269
Gross property, plant and equipment	19,039	18,368
Less accumulated depreciation and amortization	(6,443)	(5,936)
Net property and equipment	12,596	12,432
OTHER ASSETS	649	623
TOTAL ASSETS	27,836	26,761
CURRENT LIABILITIES
Accounts payable	7,302	6,544
Current portion of long-term debt	0	900
Accrued salaries and benefits	1,765	1,758
Accrued sales and other taxes	378	335
Other current liabilities	1,799	1,540
Deferred membership fees	1,122	973
Total current liabilities	12,366	12,050
LONG-TERM DEBT, excluding current portion	1,373	1,253
DEFERRED INCOME TAXES AND OTHER LIABILITIES	914	885
Total liabilities	14,653	14,188
COMMITMENTS AND CONTINGENCIES
EQUITY
Preferred stock $.005 par value; 100,000,000 shares authorized; no shares issued and outstanding	0	0
Common stock $.005 par value; 900,000,000 shares authorized; 433,243,000 and 434,266,000 shares issued and outstanding	2	2
Additional paid-in capital	4,653	4,516
Accumulated other comprehensive income	319	373
Retained earnings	7,611	7,111
Total Costco stockholders' equity	12,585	12,002
Noncontrolling interests	598	571
Total equity	13,183	12,573
TOTAL LIABILITIES AND EQUITY	$ 27,836	$ 26,761

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Summary of Stock-Based Compensation Expense (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	May 06, 2012	May 08, 2011	May 06, 2012	May 08, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense before income taxes	$ 45	$ 43	$ 179	$ 152
Less recognized income tax benefit	(15)	(14)	(59)	(49)
Total stock-based compensation expense, net of income taxes	30	29	120	103
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense before income taxes	45	43	179	151
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense before income taxes	$ 0	$ 0	$ 0	$ 1

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) (USD $) In Millions, unless otherwise specified	9 Months Ended
	May 06, 2012	May 08, 2011
Interest capitalized	$ 6	$ 6

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Carrying Value and Estimated Fair Value of Company's Long-Term Debt (Parenthetical) (Detail)	9 Months Ended
	May 06, 2012
5.5% Senior Notes due March 2017
Debt Instrument [Line Items]
Loan interest rate, fixed	5.50%
Debt instrument, principal due date	2017-03
5.3% Senior Notes due March 2012
Debt Instrument [Line Items]
Loan interest rate, fixed	5.30%
Debt instrument, principal due date	2012-03
2.695% Promissory Notes Due October 2017
Debt Instrument [Line Items]
Loan interest rate, fixed	2.695%
Debt instrument, principal due date	2017-10
1.18% Promissory Notes Due October 2018
Debt Instrument [Line Items]
Loan interest rate, fixed	1.18%
Debt instrument, principal due date	2018-10

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Equity and Comprehensive Income (Tables)

9 Months Ended

May 06, 2012

Stock Repurchased During Period

The Company’s stock repurchase activity during the third quarter and first thirty-six weeks of 2012 and 2011 is summarized in the following table:

	Shares Repurchased (000’s)		Average Price per Share		Total Cost
Third quarter of 2012		1,488	$	87.41	$	130
First thirty-six weeks of 2012		5,369		83.38		448
Third quarter of 2011		1,393	$	73.25	$	102
First thirty-six weeks of 2011		5,144		67.40		347

Components of Equity and Comprehensive Income

The following tables show the changes in equity attributable to Costco and the noncontrolling interests of consolidated subsidiaries and other entities in which the Company has a controlling interest, but not a total ownership interest:

	Attributable to Costco			Noncontrolling Interests			Total Equity
Equity at August 28, 2011	$	12,002		$	571		$	12,573
Comprehensive income:
Unrealized loss on short-term investments, net of $1 tax		(2	)		0			(2	)
Foreign-currency translation adjustment and other		(52	)		(18	)		(70	)
Net income		1,100			45			1,145
Total comprehensive income		1,046			27			1,073
Stock-based compensation		179			0			179
Stock options exercised including tax effects		89			0			89
Release of vested restricted stock units (RSUs) including tax effects		(75	)		0			(75	)
Conversion of convertible notes		1			0			1
Repurchases of common stock		(448	)		0			(448	)
Cash dividends declared		(209	)		0			(209	)
Equity at May 6, 2012	$	12,585		$	598		$	13,183
	Attributable to Costco			Noncontrolling Interests			Total Equity
Equity at August 29, 2010	$	10,829		$	101		$	10,930
Initial consolidation of noncontrolling interest in Costco Mexico		0			357			357
Comprehensive income:
Foreign-currency translation adjustment and other		362			62			424
Net income		984			58			1,042
Total comprehensive income		1,346			120			1,466
Stock-based compensation		152			0			152
Stock options exercised including tax effects		315			0			315
Release of vested RSUs including tax effects		(50	)		0			(50	)
Conversion of convertible notes		2			0			2
Repurchases of common stock		(347	)		0			(347	)
Cash dividends declared		(284	)		0			(284	)
Equity at May 8, 2011	$	11,963		$	578		$	12,541

Components of Comprehensive Income

The following table shows components of comprehensive income for the third quarter of 2012 and 2011:

	12 Weeks Ended
	May 6, 2012			May 8, 2011
Net income including noncontrolling interests	$	405		$	341
Unrealized gain/(loss) on short-term investments		(1	)		3
Foreign currency translation adjustment and other		6			161
Comprehensive income		410			505
Comprehensive (income) attributable to noncontrolling interests		(11	)		(37	)
Comprehensive income attributable to Costco	$	399		$	468

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Equity and Comprehensive Income - Additional Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended	1 Months Ended
	May 08, 2011	May 06, 2012	May 09, 2012 Subsequent Event Dividend Declared
Equity And Comprehensive Income [Line Items]
Quarterly dividend rate	$ 0.24		$ 0.275
Quarterly dividend payable	$ 105	$ 0	$ 119
Dividend payable, date			Jun. 08, 2012
Dividend record, date			May 25, 2012
Stock repurchase authorization amount remaining		$ 3,258

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Net Income Per Common and Common Equivalent Share (Tables)

9 Months Ended

May 06, 2012

Schedule of Earnings Per Share Effect on Net Income and Weighted Average Number of Dilutive Potential Common Stock

The following table shows the amounts used in computing net income per share and the effect on net income and the weighted average number of potentially dilutive shares of common stock (shares in 000’s):

	12 Weeks Ended				36 Weeks Ended
	May 6, 2012		May 8, 2011		May 6, 2012		May 8, 2011
Net income available to common stockholders used in basic and diluted net income per common share	$	386	$	324	$	1,100	$	984
Interest on convertible notes, net of tax		0		1		1		1
Net income available to common stockholders after assumed conversions of dilutive securities	$	386	$	325	$	1,101	$	985
Weighted average number of common shares used in basic net income per common share		433,791		436,977		434,180		435,913
Stock options and RSUs		4,532		5,693		4,713		5,887
Conversion of convertible notes		843		900		855		927
Weighted number of common shares and dilutive potential of common stock used in diluted net income per share		439,166		443,570		439,748		442,727
Anti-dilutive RSUs		0		0		0		8

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Summary of Significant Policies

9 Months Ended

May 06, 2012

Summary of Significant Policies

Note 1—Summary of Significant Policies

Basis of Presentation

Costco Wholesale Corporation and its subsidiaries operate membership warehouses that offer low prices on a limited selection of nationally branded and select private-label products in a wide range of merchandise categories in no-frills, self-service facilities. At May 6, 2012, Costco operated 602 warehouses worldwide, which included: 435 U.S. and Puerto Rico locations, 82 Canadian locations, 32 Mexico locations, 22 United Kingdom locations, 13 Japan locations, eight Taiwan locations, seven Korea locations, and three Australia locations. The Company also operates Costco Online, an electronic commerce web site, at www.costco.com and at www.costco.ca in Canada.

The accompanying condensed consolidated financial statements include the accounts of Costco Wholesale Corporation, a Washington corporation, its wholly-owned subsidiaries, subsidiaries in which it has a controlling interest, consolidated entities in which it has made equity investments or has other interests through which it has majority-voting control or exercises the right to direct the activities that most significantly impact the entity’s performance (Costco or the Company). The Company reports its noncontrolling interests in consolidated entities as a component of equity separate from the Company’s equity. All material inter-company transactions between the Company and its consolidated subsidiaries and other entities have been eliminated in consolidation. Unless otherwise noted, references to net income relate to net income attributable to Costco.

These unaudited condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q for interim financial reporting pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). While these statements reflect all normal recurring adjustments that are, in the opinion of management, necessary for fair presentation of the results of the interim period, they do not include all of the information and footnotes required by U.S. generally accepted accounting principles (GAAP) for complete financial statements. Therefore, the interim condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company’s annual report filed on Form 10-K for the fiscal year ended August 28, 2011.

In June 2009, the Financial Accounting Standards Board (FASB) issued amended guidance concerning whether a company’s variable interest(s) in an entity constitute a controlling financial interest. The Company adopted this guidance on August 30, 2010 (the beginning of its fiscal 2011). As a result, the Company determined that its 50%-owned joint venture, Costco Mexico (Mexico), would be consolidated on a prospective basis beginning August 30, 2010.

Fiscal Year End

The Company operates on a 52/53-week fiscal year basis with the fiscal year ending on the Sunday closest to August 31. Fiscal 2012 is a 53-week year ending on September 2, 2012. References to the third quarters of 2012 and 2011 relate to the 12-week fiscal quarters ended May 6, 2012 and May 8, 2011, respectively. References to the first thirty-six weeks of 2012 and 2011 relate to the thirty six-weeks ended May 6, 2012 and May 8, 2011, respectively.

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates and assumptions.

Reclassifications

Certain reclassifications have been made to prior fiscal year amounts or balances to conform to the presentation in the current fiscal year. These reclassifications did not have a material impact on the Company’s previously reported condensed consolidated financial statements.

Fair Value of Financial Instruments

The carrying value of the Company’s financial instruments, including cash and cash equivalents, receivables and accounts payable, approximate fair value due to their short-term nature or variable interest rates. See Notes 2, 3, and 4 for the carrying value and fair value of the Company’s investments, derivative instruments, and fixed-rate debt.

The Company follows the authoritative guidance for fair value measurements relating to financial and nonfinancial assets and liabilities, including presentation of required disclosures. This guidance defines fair value as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants at the measurement date. The guidance also establishes a fair value hierarchy, which requires maximizing the use of observable inputs when measuring fair value. The three levels of inputs that may be used are:

Level 1:	Quoted market prices in active markets for identical assets or liabilities.
Level 2:	Observable market-based inputs or unobservable inputs that are corroborated by market data.
Level 3:	Significant unobservable inputs that are not corroborated by market data.

Our current financial liabilities have fair values that approximate their carrying values. Our long-term financial liabilities consist of long-term debt, which is reported on the balance sheet at issuance price less unamortized discount. There have been no material changes to the valuation techniques utilized in the fair value measurement of assets and liabilities as disclosed in the Company’s Form 10-K for the fiscal year ended August 28, 2011.

Merchandise Inventories

Merchandise inventories are valued at the lower of cost or market, as determined primarily by the retail inventory method, and are stated using the last-in, first-out (LIFO) method for substantially all U.S. merchandise inventories. Merchandise inventories for all foreign operations are primarily valued by the retail inventory method and are stated using the first-in, first-out (FIFO) method. The Company believes the LIFO method more fairly presents the results of operations by more closely matching current costs with current revenues. The Company records an adjustment each quarter, if necessary, for the projected annual effect of inflation or deflation, and these estimates are adjusted to actual results determined at year-end, when actual inflation rates and inventory levels have been determined. Due to net inflationary trends, merchandise inventories valued at LIFO were lower than FIFO resulting in a charge to merchandise costs of $6 and $9 in the third quarter and first thirty-six weeks of 2012, respectively, compared to charges of $49 and $55 in the third quarter and first thirty six-weeks of 2011, respectively. At May 6, 2012 and August 28, 2011, merchandise inventories valued at LIFO were lower than FIFO by $96 and $87, respectively.

Derivatives

The Company is exposed to foreign-currency exchange-rate fluctuations in the normal course of business. The Company manages these fluctuations, in part, through the use of forward foreign-exchange contracts, seeking to economically hedge the impact of fluctuations of foreign exchange on known future expenditures denominated in a non-functional foreign currency. The contracts are intended primarily to economically hedge exposure to U.S. dollar merchandise inventory expenditures made by the Company’s international subsidiaries whose functional currency is not the U.S. dollar. Currently, these contracts do not qualify for derivative hedge accounting. The Company seeks to mitigate risk with the use of these contracts and does not intend to engage in speculative transactions. These contracts do not contain any credit-risk-related contingent features. The aggregate notional amounts of forward foreign-exchange contracts were $226 and $221 at May 6, 2012, and May 8, 2011, respectively.

The Company seeks to manage counterparty risk associated with these contracts by limiting transactions to counterparties with which the Company has an established banking relationship. There can be no assurance, however, that this practice effectively mitigates counterparty risk. The contracts are limited to less than one year in duration. See Note 3 for information on the fair value of open, unsettled forward foreign-exchange contracts as of May 6, 2012, and May 8, 2011.

The following table summarizes the amount of unrealized gains or losses recognized in interest income and other, net in the accompanying condensed consolidated statements of income relating to the net changes in the fair value of open-unsettled forward foreign-exchange contracts:

	12 Weeks Ended					36 Weeks Ended
	May 6, 2012		May 8, 2011			May 6, 2012			May 8, 2011
Forward foreign-exchange contracts	$	1	$	(3	)	$	(2	)	$	(4	)

The Company is exposed to fluctuations in prices for the energy it consumes, particularly electricity and natural gas, which it seeks to partially mitigate through the use of fixed-price contracts for certain of its warehouses and other facilities, primarily in the U.S. and Canada. The Company also enters into variable-priced contracts for some purchases of natural gas, in addition to fuel for its gas stations, on an index basis. These contracts meet the characteristics of derivative instruments, but generally qualify for the “normal purchases or normal sales” exception under authoritative guidance and thus require no mark-to-market adjustment.

Foreign Currency

The Company recognizes foreign-currency transaction gains and losses related to revaluing all monetary assets and revaluing or settling monetary liabilities denominated in currencies other than the functional currency (generally the U.S. dollar cash and cash equivalents and the U.S. dollar payables of consolidated subsidiaries to their functional currency) in interest income and other, net in the accompanying condensed consolidated statements of income. Also included are realized foreign-currency gains or losses from all settlements of forward foreign-exchange contracts. These items resulted in a net gain of $2 and $25 in the third quarter and first thirty-six weeks of 2012, respectively, as compared to a net loss of $5 and $16 in the third quarter and first thirty-six weeks of 2011, respectively.

Stock Repurchase Programs

Repurchased shares of common stock are retired, in accordance with the Washington Business Corporation Act. The par value of repurchased shares is deducted from common stock and the excess of repurchase price over par value is deducted from additional paid-in capital and retained earnings. See Note 5 for additional information.

Recently Adopted Accounting Pronouncements

In May 2011, the FASB issued guidance related to fair value measurement that changes the wording used to describe many requirements in GAAP for measuring and disclosing fair values. Additionally, the amendments clarify the application of existing fair value measurement requirements. The amended guidance is effective prospectively for interim and annual periods beginning after December 15, 2011. The Company adopted this guidance at the beginning of its third quarter of fiscal year 2012. Adoption of this guidance did not have a material impact on the Company’s consolidated financial statement disclosures.

Recent Accounting Pronouncements Not Yet Adopted

In June 2011, the FASB issued guidance that eliminates the option to report other comprehensive income and its components in the statement of changes in equity. Instead, an entity will be required to present either a continuous statement of net income and other comprehensive income or to present the information in two separate but consecutive statements. The new guidance must be applied retrospectively and is effective for fiscal years, and interim periods within those years, beginning after December 15, 2011. The Company plans to adopt this guidance at the beginning of its first quarter of fiscal 2013. Adoption of this guidance is not expected to have a material impact on the Company’s consolidated financial statements and will impact the financial statements’ presentation only. A portion of the new comprehensive income guidance required entities to present reclassification adjustments out of accumulated other comprehensive income by component in both the statement in which net income is presented and the statement in which other comprehensive income is presented. In December 2011, the FASB issued guidance which indefinitely defers the guidance related to the presentation of reclassification adjustments.

In September 2011, the FASB amended its guidance related to the disclosure requirements for employers subject to multi-employer pension plans. The amended guidance requires additional separate disclosures for multi-employer pension plans and other multi-employer post-retirement benefit plans. The amended guidance is effective for public entities for annual periods ending after December 15, 2011. The Company plans to adopt this guidance for its annual report on Form 10-K for its fiscal year 2012. Because the guidance only affects the annual disclosures required for multi-employer pension plans, it is not expected to have a material effect on the Company’s consolidated financial statements.

In September 2011, the FASB issued guidance to amend and simplify the rules related to testing goodwill for impairment. The revised guidance allows an initial qualitative evaluation, based on the entity’s events and circumstances, to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. The results of this qualitative assessment determine whether it is necessary to perform the currently required two-step impairment test. The new guidance is effective for annual and interim goodwill impairment tests performed for fiscal years beginning after December 15, 2011. Early adoption is permitted. Adoption of this guidance is not expected to have a material impact on the Company’s consolidated financial statements.

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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	May 06, 2012	Aug. 28, 2011
Preferred stock, par value	$ 0.005	$ 0.005
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.005	$ 0.005
Common stock, shares authorized	900,000,000	900,000,000
Common stock, shares issued	433,243,000	434,266,000
Common stock, shares outstanding	433,243,000	434,266,000

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Summary of Significant Policies (Policies)

9 Months Ended

May 06, 2012

Basis of Presentation

Basis of Presentation

Costco Wholesale Corporation and its subsidiaries operate membership warehouses that offer low prices on a limited selection of nationally branded and select private-label products in a wide range of merchandise categories in no-frills, self-service facilities. At May 6, 2012, Costco operated 602 warehouses worldwide, which included: 435 U.S. and Puerto Rico locations, 82 Canadian locations, 32 Mexico locations, 22 United Kingdom locations, 13 Japan locations, eight Taiwan locations, seven Korea locations, and three Australia locations. The Company also operates Costco Online, an electronic commerce web site, at www.costco.com and at www.costco.ca in Canada.

The accompanying condensed consolidated financial statements include the accounts of Costco Wholesale Corporation, a Washington corporation, its wholly-owned subsidiaries, subsidiaries in which it has a controlling interest, consolidated entities in which it has made equity investments or has other interests through which it has majority-voting control or exercises the right to direct the activities that most significantly impact the entity’s performance (Costco or the Company). The Company reports its noncontrolling interests in consolidated entities as a component of equity separate from the Company’s equity. All material inter-company transactions between the Company and its consolidated subsidiaries and other entities have been eliminated in consolidation. Unless otherwise noted, references to net income relate to net income attributable to Costco.

These unaudited condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q for interim financial reporting pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). While these statements reflect all normal recurring adjustments that are, in the opinion of management, necessary for fair presentation of the results of the interim period, they do not include all of the information and footnotes required by U.S. generally accepted accounting principles (GAAP) for complete financial statements. Therefore, the interim condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company’s annual report filed on Form 10-K for the fiscal year ended August 28, 2011.

In June 2009, the Financial Accounting Standards Board (FASB) issued amended guidance concerning whether a company’s variable interest(s) in an entity constitute a controlling financial interest. The Company adopted this guidance on August 30, 2010 (the beginning of its fiscal 2011). As a result, the Company determined that its 50%-owned joint venture, Costco Mexico (Mexico), would be consolidated on a prospective basis beginning August 30, 2010.

Fiscal Year End

Fiscal Year End

The Company operates on a 52/53-week fiscal year basis with the fiscal year ending on the Sunday closest to August 31. Fiscal 2012 is a 53-week year ending on September 2, 2012. References to the third quarters of 2012 and 2011 relate to the 12-week fiscal quarters ended May 6, 2012 and May 8, 2011, respectively. References to the first thirty-six weeks of 2012 and 2011 relate to the thirty six-weeks ended May 6, 2012 and May 8, 2011, respectively.

Use of Estimates

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates and assumptions.

Reclassifications

Reclassifications

Certain reclassifications have been made to prior fiscal year amounts or balances to conform to the presentation in the current fiscal year. These reclassifications did not have a material impact on the Company’s previously reported condensed consolidated financial statements.

Fair Value of Financial Instruments

Fair Value of Financial Instruments

The carrying value of the Company’s financial instruments, including cash and cash equivalents, receivables and accounts payable, approximate fair value due to their short-term nature or variable interest rates. See Notes 2, 3, and 4 for the carrying value and fair value of the Company’s investments, derivative instruments, and fixed-rate debt.

The Company follows the authoritative guidance for fair value measurements relating to financial and nonfinancial assets and liabilities, including presentation of required disclosures. This guidance defines fair value as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants at the measurement date. The guidance also establishes a fair value hierarchy, which requires maximizing the use of observable inputs when measuring fair value. The three levels of inputs that may be used are:

Level 1:	Quoted market prices in active markets for identical assets or liabilities.
Level 2:	Observable market-based inputs or unobservable inputs that are corroborated by market data.
Level 3:	Significant unobservable inputs that are not corroborated by market data.

Our current financial liabilities have fair values that approximate their carrying values. Our long-term financial liabilities consist of long-term debt, which is reported on the balance sheet at issuance price less unamortized discount. There have been no material changes to the valuation techniques utilized in the fair value measurement of assets and liabilities as disclosed in the Company’s Form 10-K for the fiscal year ended August 28, 2011.

Merchandise Inventories

Merchandise Inventories

Merchandise inventories are valued at the lower of cost or market, as determined primarily by the retail inventory method, and are stated using the last-in, first-out (LIFO) method for substantially all U.S. merchandise inventories. Merchandise inventories for all foreign operations are primarily valued by the retail inventory method and are stated using the first-in, first-out (FIFO) method. The Company believes the LIFO method more fairly presents the results of operations by more closely matching current costs with current revenues. The Company records an adjustment each quarter, if necessary, for the projected annual effect of inflation or deflation, and these estimates are adjusted to actual results determined at year-end, when actual inflation rates and inventory levels have been determined. Due to net inflationary trends, merchandise inventories valued at LIFO were lower than FIFO resulting in a charge to merchandise costs of $6 and $9 in the third quarter and first thirty-six weeks of 2012, respectively, compared to charges of $49 and $55 in the third quarter and first thirty six-weeks of 2011, respectively. At May 6, 2012 and August 28, 2011, merchandise inventories valued at LIFO were lower than FIFO by $96 and $87, respectively.

Derivatives

Derivatives

The Company is exposed to foreign-currency exchange-rate fluctuations in the normal course of business. The Company manages these fluctuations, in part, through the use of forward foreign-exchange contracts, seeking to economically hedge the impact of fluctuations of foreign exchange on known future expenditures denominated in a non-functional foreign currency. The contracts are intended primarily to economically hedge exposure to U.S. dollar merchandise inventory expenditures made by the Company’s international subsidiaries whose functional currency is not the U.S. dollar. Currently, these contracts do not qualify for derivative hedge accounting. The Company seeks to mitigate risk with the use of these contracts and does not intend to engage in speculative transactions. These contracts do not contain any credit-risk-related contingent features. The aggregate notional amounts of forward foreign-exchange contracts were $226 and $221 at May 6, 2012, and May 8, 2011, respectively.

The Company seeks to manage counterparty risk associated with these contracts by limiting transactions to counterparties with which the Company has an established banking relationship. There can be no assurance, however, that this practice effectively mitigates counterparty risk. The contracts are limited to less than one year in duration. See Note 3 for information on the fair value of open, unsettled forward foreign-exchange contracts as of May 6, 2012, and May 8, 2011.

The following table summarizes the amount of unrealized gains or losses recognized in interest income and other, net in the accompanying condensed consolidated statements of income relating to the net changes in the fair value of open-unsettled forward foreign-exchange contracts:

	12 Weeks Ended					36 Weeks Ended
	May 6, 2012		May 8, 2011			May 6, 2012			May 8, 2011
Forward foreign-exchange contracts	$	1	$	(3	)	$	(2	)	$	(4	)

The Company is exposed to fluctuations in prices for the energy it consumes, particularly electricity and natural gas, which it seeks to partially mitigate through the use of fixed-price contracts for certain of its warehouses and other facilities, primarily in the U.S. and Canada. The Company also enters into variable-priced contracts for some purchases of natural gas, in addition to fuel for its gas stations, on an index basis. These contracts meet the characteristics of derivative instruments, but generally qualify for the “normal purchases or normal sales” exception under authoritative guidance and thus require no mark-to-market adjustment.

Foreign Currency

Foreign Currency

The Company recognizes foreign-currency transaction gains and losses related to revaluing all monetary assets and revaluing or settling monetary liabilities denominated in currencies other than the functional currency (generally the U.S. dollar cash and cash equivalents and the U.S. dollar payables of consolidated subsidiaries to their functional currency) in interest income and other, net in the accompanying condensed consolidated statements of income. Also included are realized foreign-currency gains or losses from all settlements of forward foreign-exchange contracts. These items resulted in a net gain of $2 and $25 in the third quarter and first thirty-six weeks of 2012, respectively, as compared to a net loss of $5 and $16 in the third quarter and first thirty-six weeks of 2011, respectively.

Stock Repurchase Programs

Stock Repurchase Programs

Repurchased shares of common stock are retired, in accordance with the Washington Business Corporation Act. The par value of repurchased shares is deducted from common stock and the excess of repurchase price over par value is deducted from additional paid-in capital and retained earnings. See Note 5 for additional information.

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Document and Entity Information	9 Months Ended
	May 06, 2012	May 31, 2012
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	May 06, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q3
Trading Symbol	COST
Entity Registrant Name	COSTCO WHOLESALE CORP /NEW
Entity Central Index Key	0000909832
Current Fiscal Year End Date	--09-02
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		432,344,799

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Summary of Significant Policies (Tables)

9 Months Ended

May 06, 2012

Unrealized Gains or Losses Recognized in Interest Income and Other, Net

The following table summarizes the amount of unrealized gains or losses recognized in interest income and other, net in the accompanying condensed consolidated statements of income relating to the net changes in the fair value of open-unsettled forward foreign-exchange contracts:

	12 Weeks Ended					36 Weeks Ended
	May 6, 2012		May 8, 2011			May 6, 2012			May 8, 2011
Forward foreign-exchange contracts	$	1	$	(3	)	$	(2	)	$	(4	)

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CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	May 06, 2012	May 08, 2011	May 06, 2012	May 08, 2011
REVENUE
Net sales	$ 21,849	$ 20,188	$ 65,538	$ 59,460
Membership fees	475	435	1,381	1,277
Total revenue	22,324	20,623	66,919	60,737
OPERATING EXPENSES
Merchandise costs	19,543	18,067	58,613	53,059
Selling, general and administrative	2,151	1,991	6,472	5,970
Preopening expenses	6	8	22	24
Provision for impaired assets, closing costs and other, net	1	1	2	7
Operating income	623	556	1,810	1,677
OTHER INCOME (EXPENSE)
Interest expense	(19)	(27)	(73)	(80)
Interest income and other, net	18	5	65	14
INCOME BEFORE INCOME TAXES	622	534	1,802	1,611
Provision for income taxes	217	193	657	569
Net income including noncontrolling interests	405	341	1,145	1,042
Net income attributable to noncontrolling interests	(19)	(17)	(45)	(58)
NET INCOME ATTRIBUTABLE TO COSTCO	$ 386	$ 324	$ 1,100	$ 984
NET INCOME PER COMMON SHARE ATTRIBUTABLE TO COSTCO:
Basic	$ 0.89	$ 0.74	$ 2.53	$ 2.26
Diluted	$ 0.88	$ 0.73	$ 2.50	$ 2.22
Shares used in calculation (000's)
Basic	433,791	436,977	434,180	435,913
Diluted	439,166	443,570	439,748	442,727
CASH DIVIDENDS DECLARED PER COMMON SHARE	$ 0.000	$ 0.240	$ 0.480	$ 0.650

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Stock-Based Compensation Plans

9 Months Ended

May 06, 2012

Stock-Based Compensation Plans

Note 6—Stock-Based Compensation Plans

Summary of Stock Option Activity

In the second quarter of fiscal 2012, the Fifth Restated 2002 Stock Incentive Plan was amended following shareholder approval and is now referred to as the Sixth Restated 2002 Stock Incentive Plan (Sixth Restated 2002 Plan). The Sixth Restated 2002 Plan authorizes the issuance of 16,000,000 shares (9,143,000 RSUs) of common stock for future grants in addition to shares authorized under the previous plan. Each RSU issued is counted as 1.75 shares toward the limit of shares available. The Company issues new shares of common stock upon exercise of stock options and vesting of RSUs.

The following table summarizes stock option transactions during the first thirty-six weeks of 2012:

	Number Of Options (in 000’s)			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in  years)		Aggregate Intrinsic Value(1)
Outstanding and exercisable at August 28, 2011		5,917		$	40.07
Exercised		(1,760	)		39.50
Outstanding and exercisable at May 6, 2012		4,157		$	40.31		2.30	$	179

(1) The difference between the exercise price and market value of common stock at May 6, 2012.

The tax benefits realized and intrinsic value related to total stock options exercised during the first thirty-six weeks of 2012 and 2011 are provided in the following table:

	36 Weeks Ended
	May 6, 2012		May 8, 2011
Actual tax benefit realized for stock options exercised	$	29	$	73
Intrinsic value of stock options exercised(1)	$	82	$	215

(1) The difference between the exercise price and market value of common stock measured at each individual exercise date.

Summary of Restricted Stock Unit Activity

At May 6, 2012, 14,300,000 shares were available to be granted as RSUs under the Sixth Restated 2002 Plan.

The following awards were outstanding at May 6, 2012:

• 8,617,000 shares of time-based RSUs that vest upon continued employment over specified periods of time;

• 398,000 performance-based RSUs granted to certain executive officers of the Company for which the performance targets have been met. Further restrictions lapse upon achievement of continued employment over specified periods of time; and

• 304,000 performance-based RSUs to be granted to executive officers of the Company upon achievement of specified performance targets for fiscal 2012, as determined by the Compensation Committee of the Board of Directors after the end of the fiscal year. These awards are included in the table below and the Company recognized compensation expense for these awards as it is currently deemed probable that the performance targets will be achieved.

The following table summarizes RSU transactions during the first thirty-six weeks of 2012:

	Number of Units (in 000’s)			Weighted- Average Grant Date Fair Value
Non-vested at August 28, 2011		9,727		$	57.56
Granted		3,593			81.44
Vested		(3,808	)		58.96
Forfeited		(193	)		65.97
Non-vested at May 6, 2012		9,319		$	65.61

Summary of Stock-Based Compensation

The following table summarizes stock-based compensation expense and the related tax benefits under the Company’s plans:

	12 Weeks Ended						36 Weeks Ended
	May 6, 2012			May 8, 2011			May 6, 2012			May 8, 2011
RSUs	$	45		$	43		$	179		$	151
Stock options		0			0			0			1
Total stock-based compensation expense before income taxes		45			43			179			152
Less recognized income tax benefit		(15	)		(14	)		(59	)		(49	)
Total stock-based compensation expense, net of income taxes	$	30		$	29		$	120		$	103

The remaining unrecognized compensation cost related to non-vested RSUs at May 6, 2012, was $488 and the weighted-average period of time over which this cost will be recognized is 1.8 years.

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Equity and Comprehensive Income

9 Months Ended

May 06, 2012

Equity and Comprehensive Income

Note 5—Equity and Comprehensive Income

Dividends

On May 9, 2012, subsequent to the end of the third quarter, the Board of Directors declared a quarterly cash dividend in the amount of $0.275 per share, with a total $119 payable on June 8, 2012, to shareholders of record at the close of business on May 25, 2012. The Company’s dividend rate was $0.24 per share in the third quarter of 2011.

Stock Repurchase Programs

The Company’s stock repurchase activity during the third quarter and first thirty-six weeks of 2012 and 2011 is summarized in the following table:

	Shares Repurchased (000’s)		Average Price per Share		Total Cost
Third quarter of 2012		1,488	$	87.41	$	130
First thirty-six weeks of 2012		5,369		83.38		448
Third quarter of 2011		1,393	$	73.25	$	102
First thirty-six weeks of 2011		5,144		67.40		347

These amounts differ from the stock repurchase balances in the condensed consolidated statements of cash flows due to changes in unsettled stock repurchases at the end of the quarter. The remaining amount available for stock repurchases under the approved plans was $3,258 at May 6, 2012. Purchases are made from time-to-time, as conditions warrant, in the open market or in block purchases, and pursuant to plans under SEC Rule 10b5-1. Repurchased shares are retired.

Components of Equity and Comprehensive Income

The following tables show the changes in equity attributable to Costco and the noncontrolling interests of consolidated subsidiaries and other entities in which the Company has a controlling interest, but not a total ownership interest:

	Attributable to Costco			Noncontrolling Interests			Total Equity
Equity at August 28, 2011	$	12,002		$	571		$	12,573
Comprehensive income:
Unrealized loss on short-term investments, net of $1 tax		(2	)		0			(2	)
Foreign-currency translation adjustment and other		(52	)		(18	)		(70	)
Net income		1,100			45			1,145
Total comprehensive income		1,046			27			1,073
Stock-based compensation		179			0			179
Stock options exercised including tax effects		89			0			89
Release of vested restricted stock units (RSUs) including tax effects		(75	)		0			(75	)
Conversion of convertible notes		1			0			1
Repurchases of common stock		(448	)		0			(448	)
Cash dividends declared		(209	)		0			(209	)
Equity at May 6, 2012	$	12,585		$	598		$	13,183
	Attributable to Costco			Noncontrolling Interests			Total Equity
Equity at August 29, 2010	$	10,829		$	101		$	10,930
Initial consolidation of noncontrolling interest in Costco Mexico		0			357			357
Comprehensive income:
Foreign-currency translation adjustment and other		362			62			424
Net income		984			58			1,042
Total comprehensive income		1,346			120			1,466
Stock-based compensation		152			0			152
Stock options exercised including tax effects		315			0			315
Release of vested RSUs including tax effects		(50	)		0			(50	)
Conversion of convertible notes		2			0			2
Repurchases of common stock		(347	)		0			(347	)
Cash dividends declared		(284	)		0			(284	)
Equity at May 8, 2011	$	11,963		$	578		$	12,541

The following table shows components of comprehensive income for the third quarter of 2012 and 2011:

	12 Weeks Ended
	May 6, 2012			May 8, 2011
Net income including noncontrolling interests	$	405		$	341
Unrealized gain/(loss) on short-term investments		(1	)		3
Foreign currency translation adjustment and other		6			161
Comprehensive income		410			505
Comprehensive (income) attributable to noncontrolling interests		(11	)		(37	)
Comprehensive income attributable to Costco	$	399		$	468

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Stock-Based Compensation Plans (Tables)

9 Months Ended

May 06, 2012

Summary of Stock Option Activity

The following table summarizes stock option transactions during the first thirty-six weeks of 2012:

	Number Of Options (in 000’s)			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in  years)		Aggregate Intrinsic Value(1)
Outstanding and exercisable at August 28, 2011		5,917		$	40.07
Exercised		(1,760	)		39.50
Outstanding and exercisable at May 6, 2012		4,157		$	40.31		2.30	$	179

(1) The difference between the exercise price and market value of common stock at May 6, 2012.

Tax Benefits Realized and Intrinsic Value Related to Stock Options Exercised

The tax benefits realized and intrinsic value related to total stock options exercised during the first thirty-six weeks of 2012 and 2011 are provided in the following table:

	36 Weeks Ended
	May 6, 2012		May 8, 2011
Actual tax benefit realized for stock options exercised	$	29	$	73
Intrinsic value of stock options exercised(1)	$	82	$	215

(1) The difference between the exercise price and market value of common stock measured at each individual exercise date.

Summary of RSU Transactions

The following table summarizes RSU transactions during the first thirty-six weeks of 2012:

	Number of Units (in 000’s)			Weighted- Average Grant Date Fair Value
Non-vested at August 28, 2011		9,727		$	57.56
Granted		3,593			81.44
Vested		(3,808	)		58.96
Forfeited		(193	)		65.97
Non-vested at May 6, 2012		9,319		$	65.61

Summary of Stock-Based Compensation Expense

The following table summarizes stock-based compensation expense and the related tax benefits under the Company’s plans:

	12 Weeks Ended						36 Weeks Ended
	May 6, 2012			May 8, 2011			May 6, 2012			May 8, 2011
RSUs	$	45		$	43		$	179		$	151
Stock options		0			0			0			1
Total stock-based compensation expense before income taxes		45			43			179			152
Less recognized income tax benefit		(15	)		(14	)		(59	)		(49	)
Total stock-based compensation expense, net of income taxes	$	30		$	29		$	120		$	103

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Investments (Tables)

9 Months Ended

May 06, 2012

Available for Sale and Held to Maturity Investments

The Company’s investments at May 6, 2012 and August 28, 2011, were as follows:

May 6, 2012:	Cost Basis		Unrealized Gains		Recorded Basis
Available-for-sale:
U.S. government and agency securities	$	906	$	6	$	912
Corporate notes and bonds		59		0		59
FDIC-insured corporate bonds		100		1		101
Asset and mortgage-backed securities		9		0		9
Total available-for-sale		1,074		7		1,081
Held-to-maturity:
Certificates of deposit		104				104
Total short-term investments	$	1,178	$	7	$	1,185
August 28, 2011:	Cost Basis		Unrealized Gains		Recorded Basis
Available-for-sale:
U.S. government and agency securities	$	1,096	$	8	$	1,104
Corporate notes and bonds		6		1		7
FDIC-insured corporate bonds		208		1		209
Asset and mortgage-backed securities		12		0		12
Total available-for-sale		1,322		10		1,332
Held-to-maturity:
Certificates of deposit		272				272
Total short-term investments	$	1,594	$	10	$	1,604

Proceeds From Sales of Available for Sale Securities

The proceeds from sales of available-for-sale securities during the third quarter and first thirty-six weeks of 2012 and 2011 are provided in the following table:

	12 Weeks Ended				36 Weeks Ended
	May 6, 2012		May 8, 2011		May 6, 2012		May 8, 2011
Proceeds	$	112	$	51	$	303	$	465

Maturities of Available for Sale and Held to Maturity Securities

The maturities of available-for-sale and held-to-maturity securities at May 6, 2012, were as follows:

	Available-For-Sale				Held-To-Maturity
	Cost Basis		Fair Value		Cost Basis		Fair Value
Due in one year or less .	$	785	$	786	$	104	$	104
Due after one year through five years		288		294		0		0
Due after five years .		1		1		0		0
	$	1,074	$	1,081	$	104	$	104

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Commitments and Contingencies

9 Months Ended

May 06, 2012

Commitments and Contingencies

Note 9—Commitments and Contingencies

The Company is involved in a number of claims, proceedings and litigation arising from its business and property ownership. In accordance with applicable accounting guidance, the Company establishes an accrual for legal proceedings if and when those matters reach a stage where they present loss contingencies that are both probable and reasonably estimable. In such cases, there may be a possible exposure to loss in excess of any amounts accrued. The Company monitors those matters for developments that would affect the likelihood of a loss and the accrued amount, if any, thereof, and adjusts the amount as appropriate. If the loss contingency at issue is not both probable and reasonably estimable, the Company does not establish an accrual, but will continue to monitor the matter for developments that will make the loss contingency both probable and reasonably estimable. As of the date of this report, except where specifically noted otherwise, the Company has not recorded an accrual related to any of the claims, proceedings or actions described herein, as the Company does not believe a material loss is probable. In each case, except where it is noted that a matter has been concluded, there is a reasonable possibility that a loss may be incurred. At this time, however, based on the status of each matter, the possible loss or range of loss cannot in our view be reasonably estimated because, among other things, (i) the remedies or penalties sought are indeterminate or unspecified, (ii) the legal and/or factual theories are not well developed; and/or (iii) the matters involve complex or novel legal theories or a large number of parties.

The Company is a defendant in the following matters, among others:

A case brought as a class action on behalf of certain present and former female managers, in which plaintiffs allege denial of promotion based on gender in violation of Title VII of the Civil Rights Act of 1964 and California state law. Shirley "Rae" Ellis v. Costco Wholesale Corp., United States District Court (San Francisco), Case No. C-04-3341-MHP. Plaintiffs seek compensatory damages, punitive damages, injunctive relief, interest and attorneys' fees. Class certification was granted by the district court on January 11, 2007. On September 16, 2011, the United States Court of Appeals for the Ninth Circuit reversed the order of class certification and remanded to the district court for further proceedings. The Company has filed a motion to deny class certification, and it is expected that plaintiffs will move for class certification.

Numerous putative class actions have been brought around the United States against motor fuel retailers, including the Company, alleging that they have been overcharging consumers by selling gasoline or diesel that is warmer than 60 degrees without adjusting the volume sold to compensate for heat-related expansion or disclosing the effect of such expansion on the energy equivalent received by the consumer. The Company is named in the following actions: Raphael Sagalyn, et al., v. Chevron USA, Inc., et al., Case No. 07-430 (D. Md.); Phyllis Lerner, et al., v. Costco Wholesale Corporation, et al., Case No. 07-1216 (C.D. Cal.); Linda A. Williams, et al., v. BP Corporation North America, Inc., et al., Case No. 07-179 (M.D. Ala.); James Graham, et al. v. Chevron USA, Inc., et al., Civil Action No. 07-193 (E.D. Va.); Betty A. Delgado, et al., v. Allsups, Convenience Stores, Inc., et al., Case No. 07-202 (D.N.M.); Gary Kohut, et al. v. Chevron USA, Inc., et al., Case No. 07-285 (D. Nev.); Mark Rushing, et al., v. Alon USA, Inc., et al., Case No. 06-7621 (N.D. Cal.); James Vanderbilt, et al., v. BP Corporation North America, Inc., et al., Case No. 06-1052 (W.D. Mo.); Zachary Wilson, et al., v. Ampride, Inc., et al., Case No. 06-2582 (D. Kan.); Diane Foster, et al., v. BP North America Petroleum, Inc., et al., Case No. 07-02059 (W.D. Tenn.); Mara Redstone, et al., v. Chevron USA, Inc., et al., Case No. 07-20751 (S.D. Fla.); Fred Aguirre, et al. v. BP West Coast Products LLC, et al., Case No. 07-1534 (N.D. Cal.); J.C. Wash, et al., v. Chevron USA, Inc., et al.; Case No. 4:07cv37 (E.D. Mo.); Jonathan Charles Conlin, et al., v. Chevron USA, Inc., et al.; Case No. 07 0317 (M.D. Tenn.); William Barker, et al. v. Chevron USA, Inc., et al.; Case No. 07-cv-00293 (D.N.M.); Melissa J. Couch, et al. v. BP Products North America, Inc., et al., Case No. 07cv291 (E.D. Tex.); S. Garrett Cook, Jr., et al., v. Hess Corporation, et al., Case No. 07cv750 (M.D. Ala.); Jeff Jenkins, et al. v. Amoco Oil Company, et al., Case No. 07-cv-00661 (D. Utah); and Mark Wyatt, et al., v. B. P. America Corp., et al., Case No. 07-1754 (S.D. Cal.). On June 18, 2007, the Judicial Panel on Multidistrict Litigation assigned the action, entitled In re Motor Fuel Temperature Sales Practices Litigation, MDL Docket No 1840, to Judge Kathryn Vratil in the United States District Court for the District of Kansas. On April 12, 2009, the Company agreed to settle the actions in which it is named as a defendant. Under the settlement, which is subject to final approval by the court, the Company agreed, to the extent allowed by law, to install over five years from the effective date of the settlement temperature-correcting dispensers in the States of Alabama, Arizona, California, Florida, Georgia, Kentucky, Nevada, New Mexico, North Carolina, South Carolina, Tennessee, Texas, Utah, and Virginia. Other than payments to class representatives, the settlement does not provide for cash payments to class members. On September 22, 2011, the court preliminarily approved a revised settlement, which did not materially alter the terms. On April 24, 2012, the court granted final approval of the revised settlement. A class member who objected has filed a notice of appeal from the order approving the settlement. Plaintiffs have moved for an award of $10 million in attorneys' fees, as well as an award of costs and payments to class representatives. The Company has opposed the motion.

On October 4, 2006, the Company received a grand jury subpoena from the United States Attorney's Office for the Central District of California, seeking records relating to the Company's receipt and handling of hazardous merchandise returned by Costco members and other records. The Company has entered into a tolling agreement with the United States Attorney's Office. On November 3, 2011, the Company was served with a subpoena for documents concerning the handling or disposal of any non-saleable hazardous products by or at any Company warehouse or distribution center. The subpoena is from the Office of the District Attorney of the County of San Joaquin in California and states that he has a "reasonable belief that [California] Business and Professions Code section 17200 may have been violated." A settlement was reached in this matter in May 2012, which obligates the Company to pay $2.6 in penalties and costs (for which an accrual was taken in the third quarter) and consent to an injunction regarding future compliance with all California hazardous waste laws. The settlement is subject to court approval.

The Environmental Protection Agency (EPA) issued an Information Request to the Company, dated November 1, 2007, regarding warehouses in the states of Arizona, California, Hawaii, and Nevada and relating to compliance with regulations concerning air-conditioning and refrigeration equipment. On March 4, 2009, the Company was advised by the Department of Justice that the Department was prepared to allege that the Company has committed at least nineteen violations of the leak-repair requirements of 40 C.F.R. § 82.156(i) and at least seventy-four violations of the recordkeeping requirements of 40 C.F.R. § 82.166(k), (m) at warehouses in these states. The Company has responded to these allegations, is engaged in communications with the Department about these and additional allegations, and has entered into tolling agreements. Substantial penalties may be levied for violations of the Clean Air Act. The Company is cooperating with this inquiry.

On October 7, 2009, the District Attorneys for San Diego, San Joaquin and Solano Counties filed a complaint, People of the State of California v. Costco Wholesale Corp., et al, No. 37-2009-00099912 (Superior Court for the County of San Diego), alleging on information and belief that the Company has violated and continues to violate provisions of the California Health and Safety Code and the Business and Professions Code through the use of certain spill clean-up materials at its gasoline stations. Relief sought includes, among other things, requests for preliminary and permanent injunctive relief, civil penalties, costs and attorneys' fees.

The Company has received notices from most states stating that they have appointed an agent to conduct an examination of the books and records of the Company to determine whether it has complied with state unclaimed property laws. In addition to seeking the turnover of unclaimed property subject to escheat laws, the states may seek interest, penalties, costs of examinations, and other relief. The State of Washington conducted such an examination on its own behalf and on February 4, 2011 issued an assessment. The Company filed suit on March 4, 2011, to contest the assessment.

The Company does not believe that any pending claim, proceeding or litigation, either alone or in the aggregate, will have a material adverse effect on the Company's financial position; however, it is possible that an unfavorable outcome of some or all of the matters, however unlikely, could result in a charge that might be material to the results of an individual fiscal quarter.

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Income Taxes

9 Months Ended

May 06, 2012

Income Taxes

Note 7—Income Taxes

The Company’s reported effective income tax rates for the thirty-six weeks ended May 6, 2012, and May 8, 2011, were 36.4%, and 35.3%, respectively, in the accompanying condensed consolidated statements of income, which includes the net impact of discrete items. The Company’s current year consolidated provision for income taxes was adversely impacted by a net discrete tax expense of $23 relating primarily to two items: the adverse impact of an audit of Costco Mexico by the Mexican tax authority and the tax effects of nondeductible expenses for the Company’s contribution to an initiative reforming alcohol beverage laws in Washington State.

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Net Income Per Common and Common Equivalent Share

9 Months Ended

May 06, 2012

Net Income Per Common and Common Equivalent Share

Note 8—Net Income Per Common and Common Equivalent Share

The following table shows the amounts used in computing net income per share and the effect on net income and the weighted average number of potentially dilutive shares of common stock (shares in 000’s):

	12 Weeks Ended				36 Weeks Ended
	May 6, 2012		May 8, 2011		May 6, 2012		May 8, 2011
Net income available to common stockholders used in basic and diluted net income per common share	$	386	$	324	$	1,100	$	984
Interest on convertible notes, net of tax		0		1		1		1
Net income available to common stockholders after assumed conversions of dilutive securities	$	386	$	325	$	1,101	$	985
Weighted average number of common shares used in basic net income per common share		433,791		436,977		434,180		435,913
Stock options and RSUs		4,532		5,693		4,713		5,887
Conversion of convertible notes		843		900		855		927
Weighted number of common shares and dilutive potential of common stock used in diluted net income per share		439,166		443,570		439,748		442,727
Anti-dilutive RSUs		0		0		0		8

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Segment Reporting

9 Months Ended

May 06, 2012

Segment Reporting

Note 10—Segment Reporting

The Company and its subsidiaries are principally engaged in the operation of membership warehouses in the United States, Canada, the United Kingdom, Japan, Australia, through majority-owned subsidiaries in Taiwan and Korea, and its Mexico joint venture. The Company’s reportable segments are largely based on management’s organization of the operating segments for operational decisions and assessments of financial performance, which considers geographic locations. The material accounting policies of the segments are the same as described in the notes to the consolidated financial statements included in the Company’s annual report filed on Form 10-K for the fiscal year ended August 28, 2011, after considering newly adopted accounting pronouncements described elsewhere herein. All material inter-segment net sales and expenses have been eliminated in computing total revenue and operating income. Certain home office operating expenses are incurred on behalf of the Company’s Canadian and Other International Operations, but are included in the United States Operations because those costs are not allocated internally and generally come under the responsibility of the Company’s United States management team.

	United States Operations		Canadian Operations		Other International Operations		Total
Twelve Weeks Ended May 6, 2012
Total revenue	$	16,203	$	3,474	$	2,647	$	22,324
Operating income		356		157		110		623
Depreciation and amortization		150		25		27		202
Additions to property and equipment		196		23		49		268
Twelve Weeks Ended May 8, 2011
Total revenue	$	15,172	$	3,169	$	2,282	$	20,623
Operating income		310		143		103		556
Depreciation and amortization		145		28		23		196
Additions to property and equipment		192		24		62		278
Thirty-six Weeks Ended May 6, 2012
Total revenue	$	48,428	$	10,477	$	8,014	$	66,919
Operating income		1,046		436		328		1,810
Depreciation and amortization		460		79		77		616
Additions to property and equipment		628		110		162		900
Property and equipment, net		9,012		1,631		1,953		12,596
Total assets		19,121		4,065		4,650		27,836
Thirty-six Weeks Ended May 8, 2011
Total revenue	$	44,424	$	9,426	$	6,887	$	60,737
Operating income		934		419		324		1,677
Depreciation and amortization		435		80		67		582
Additions to property and equipment		613		86		119		818
Property and equipment, net		8,812		1,635		1,853		12,300
Total assets		19,157		3,712		4,105		26,974
Year Ended August 28, 2011
Total revenue	$	64,904	$	14,020	$	9,991	$	88,915
Operating income		1,395		621		423		2,439
Depreciation and amortization		640		117		98		855
Additions to property and equipment		876		144		270		1,290
Property and equipment, net		8,870		1,608		1,954		12,432
Total assets		18,558		3,741		4,462		26,761

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Carrying Value and Estimated Fair Value of Company's Long-Term Debt (Detail) (USD $) In Millions, unless otherwise specified	May 06, 2012	Aug. 28, 2011
Debt Instrument [Line Items]
Long-term debt, carrying value	$ 1,373	$ 2,153
Less current portion	0	900
Long-term debt, excluding current portion, carrying value	1,373	1,253
Long-term debt, fair value	1,652	2,435
Less current portion	0	924
Long-term debt, excluding current portion, fair value	1,652	1,511
5.5% Senior Notes due March 2017
Debt Instrument [Line Items]
Long-term debt, carrying value	1,097	1,097
Long-term debt, fair value	1,324	1,314
5.3% Senior Notes due March 2012
Debt Instrument [Line Items]
Long-term debt, carrying value	0	900
Long-term debt, fair value	0	924
2.695% Promissory Notes Due October 2017
Debt Instrument [Line Items]
Long-term debt, carrying value	81	85
Long-term debt, fair value	90	94
1.18% Promissory Notes Due October 2018
Debt Instrument [Line Items]
Long-term debt, carrying value	125	0
Long-term debt, fair value	128	0
Other Long Term Debt
Debt Instrument [Line Items]
Long-term debt, carrying value	70	71
Long-term debt, fair value	$ 110	$ 103

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Debt (Tables)

9 Months Ended

May 06, 2012

Carrying Value and Estimated Fair Value of Company's Long-Term Debt

The carrying value and estimated fair value of the Company’s long-term debt consisted of the following:

	May 6, 2012				August 28, 2011
	Carrying Value		Fair Value		Carrying Value		Fair Value
5.5% Senior Notes due March 2017	$	1,097	$	1,324	$	1,097	$	1,314
5.3% Senior Notes due March 2012		0		0		900		924
2.695% Promissory Notes Due October 2017		81		90		85		94
1.18% Promissory Notes Due October 2018		125		128		0		0
Other long-term debt		70		110		71		103
Total long-term debt		1,373		1,652		2,153		2,435
Less current portion		0		0		900		924
Long-term debt, excluding current portion	$	1,373	$	1,652	$	1,253	$	1,511

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Summary of Significant Policies (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	May 06, 2012	May 08, 2011	May 06, 2012	May 08, 2011	Aug. 28, 2011
Summary Of Significant Accounting Policies [Line Items]
Number of warehouses operated			602
Charge to merchandise costs	$ 6	$ 49	$ 9	$ 55
Inventory LIFO reserve	96		96		87
Gain (loss) on foreign currency transaction	2	(5)	25	(16)
Forward Foreign Exchange Contracts
Summary Of Significant Accounting Policies [Line Items]
Notional Amount of Forward Foreign-Exchange Derivative	$ 226	$ 221	$ 226	$ 221
Mexico
Summary Of Significant Accounting Policies [Line Items]
Number of warehouses operated			32
U.S.
Summary Of Significant Accounting Policies [Line Items]
Number of warehouses operated			435
Canada
Summary Of Significant Accounting Policies [Line Items]
Number of warehouses operated			82
United Kingdom
Summary Of Significant Accounting Policies [Line Items]
Number of warehouses operated			22
Japan
Summary Of Significant Accounting Policies [Line Items]
Number of warehouses operated			13
Taiwan
Summary Of Significant Accounting Policies [Line Items]
Number of warehouses operated			8
Korea
Summary Of Significant Accounting Policies [Line Items]
Number of warehouses operated			7
Australia
Summary Of Significant Accounting Policies [Line Items]
Number of warehouses operated			3

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Segment Reporting Information by Segment (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	May 06, 2012	May 08, 2011	May 06, 2012	May 08, 2011	Aug. 28, 2011
Segment Reporting Information [Line Items]
Total revenue	$ 22,324	$ 20,623	$ 66,919	$ 60,737	$ 88,915
Operating income	623	556	1,810	1,677	2,439
Depreciation and amortization	202	196	616	582	855
Additions to property and equipment	268	278	900	818	1,290
Property and equipment, net	12,596	12,300	12,596	12,300	12,432
Total assets	27,836	26,974	27,836	26,974	26,761
United States Operations
Segment Reporting Information [Line Items]
Total revenue	16,203	15,172	48,428	44,424	64,904
Operating income	356	310	1,046	934	1,395
Depreciation and amortization	150	145	460	435	640
Additions to property and equipment	196	192	628	613	876
Property and equipment, net	9,012	8,812	9,012	8,812	8,870
Total assets	19,121	19,157	19,121	19,157	18,558
Canadian Operations
Segment Reporting Information [Line Items]
Total revenue	3,474	3,169	10,477	9,426	14,020
Operating income	157	143	436	419	621
Depreciation and amortization	25	28	79	80	117
Additions to property and equipment	23	24	110	86	144
Property and equipment, net	1,631	1,635	1,631	1,635	1,608
Total assets	4,065	3,712	4,065	3,712	3,741
Other International Operations
Segment Reporting Information [Line Items]
Total revenue	2,647	2,282	8,014	6,887	9,991
Operating income	110	103	328	324	423
Depreciation and amortization	27	23	77	67	98
Additions to property and equipment	49	62	162	119	270
Property and equipment, net	1,953	1,853	1,953	1,853	1,954
Total assets	$ 4,650	$ 4,105	$ 4,650	$ 4,105	$ 4,462

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Stock-Based Compensation Plans - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	9 Months Ended
	May 06, 2012	May 06, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional number of shares authorized	16,000,000
Time-based RSUs awards outstanding		8,617,000
Performance-based RSUs awards outstanding		398,000
Outstanding performance-based RSUs awards to be granted		304,000
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional number of shares authorized	9,143,000
Portion of each share issued counted towards limit of shares available	1.75
Number of shares available to be granted as RSUs	14,300,000	14,300,000
Unrecognized compensation cost	488	488
Weighted-average period of time (in years)		1.8

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	9 Months Ended
	May 06, 2012	May 08, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net income including noncontrolling interests	$ 1,145	$ 1,042
Adjustments to reconcile net income including noncontrolling interests to net cash provided by operating activities:
Depreciation and amortization	616	582
Stock-based compensation	179	152
Excess tax benefits on stock-based awards	(50)	(43)
Other non-cash operating activities, net	31	16
Deferred income taxes	(7)	(22)
Changes in operating assets and liabilities:
Increase in merchandise inventories	(434)	(357)
Increase in accounts payable	394	518
Other operating assets and liabilities, net	453	369
Net cash provided by operating activities	2,327	2,257
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of short-term investments	(1,324)	(2,528)
Maturities of short-term investments	1,414	1,474
Sales of investments	303	465
Additions to property and equipment	(900)	(818)
Proceeds from the sale of property and equipment	10	9
Increase resulting from initial consolidation of Costco Mexico	0	165
Other investing activities, net	(20)	(5)
Net cash used in investing activities	(517)	(1,238)
CASH FLOWS FROM FINANCING ACTIVITIES
Change in bank checks outstanding	412	35
Repayments of short-term borrowings	(114)	(33)
Proceeds from short-term borrowings	114	8
Proceeds from issuance of long-term debt	127	0
Repayments of long-term debt	(900)	0
Proceeds from exercise of stock options	71	273
Minimum tax withholdings on stock-based awards	(107)	(61)
Excess tax benefits on stock-based awards	50	43
Repurchases of common stock	(452)	(347)
Cash dividend payments	(209)	(179)
Other financing activities, net	(3)	(1)
Net cash used in financing activities	(1,011)	(262)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	(17)	111
Net increase in cash and cash equivalents	782	868
CASH AND CASH EQUIVALENTS BEGINNING OF YEAR	4,009	3,214
CASH AND CASH EQUIVALENTS END OF PERIOD	4,791	4,082
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Interest (reduced by $6 interest capitalized in both 2012 and 2011)	111	110
Income taxes	495	459
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Decrease in accrued property and equipment	51	53
Cash dividend declared, but not yet paid	0	105
Unsettled repurchases of common stock	$ 13	$ 0

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Debt

9 Months Ended

May 06, 2012

Debt

Note 4—Debt

In the first and second quarter of fiscal 2012, the Company’s Japanese subsidiary issued 1.18% yen-denominated promissory notes through a private placement. These notes were issued in two series, with the first funding in October 2011 and the second funding occurring in December 2011. For both series, interest is payable semi-annually, and principal is due in October 2018. The Company guarantees these notes.

On March 15, 2012, the Company paid the outstanding principal balance and associated interest on the 5.3% Senior Notes with its existing liquidity sources of cash and cash equivalents and short-term investments.

The carrying value and estimated fair value of the Company’s long-term debt consisted of the following:

	May 6, 2012				August 28, 2011
	Carrying Value		Fair Value		Carrying Value		Fair Value
5.5% Senior Notes due March 2017	$	1,097	$	1,324	$	1,097	$	1,314
5.3% Senior Notes due March 2012		0		0		900		924
2.695% Promissory Notes Due October 2017		81		90		85		94
1.18% Promissory Notes Due October 2018		125		128		0		0
Other long-term debt		70		110		71		103
Total long-term debt		1,373		1,652		2,153		2,435
Less current portion		0		0		900		924
Long-term debt, excluding current portion	$	1,373	$	1,652	$	1,253	$	1,511

The estimated fair value of the Company’s debt was based primarily on reported market values, recently completed market transactions and estimates based upon interest rates, maturities, and credit risk and is classified as Level 2 or Level 3 within the fair value hierarchy.

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Unrealized Gains or Losses Recognized in Interest Income and Other, Net (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	May 06, 2012	May 08, 2011	May 06, 2012	May 08, 2011
Summary Of Significant Accounting Policies [Line Items]
Forward foreign-exchange contracts	$ 1	$ (3)	$ (2)	$ (4)

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Changes in Equity Attributable to Costco and Noncontrolling Interests of Consolidated Subsidiaries and Other Entities (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	May 06, 2012	May 08, 2011	May 06, 2012	May 08, 2011
Equity And Comprehensive Income [Line Items]
Beginning Balance			$ 12,573	$ 10,930
Initial consolidation of noncontrolling interest in Costco Mexico				357
Comprehensive income:
Unrealized gain/(loss) on short-term investments, net of $1 tax	(1)	3	(2)
Foreign-currency translation adjustment and other	6	161	(70)	424
Net income	405	341	1,145	1,042
Total comprehensive income	410	505	1,073	1,466
Stock-based compensation	45	43	179	152
Stock options exercised including tax effects			89	315
Release of vested restricted stock units (RSUs) including tax effects			(75)	(50)
Conversion of convertible notes			1	2
Repurchases of common stock	(130)	(102)	(448)	(347)
Cash dividends declared			(209)	(284)
Ending Balance	13,183	12,541	13,183	12,541
Attributable To Costco
Equity And Comprehensive Income [Line Items]
Beginning Balance			12,002	10,829
Initial consolidation of noncontrolling interest in Costco Mexico				0
Comprehensive income:
Unrealized gain/(loss) on short-term investments, net of $1 tax			(2)
Foreign-currency translation adjustment and other			(52)	362
Net income			1,100	984
Total comprehensive income			1,046	1,346
Stock-based compensation			179	152
Stock options exercised including tax effects			89	315
Release of vested restricted stock units (RSUs) including tax effects			(75)	(50)
Conversion of convertible notes			1	2
Repurchases of common stock			(448)	(347)
Cash dividends declared			(209)	(284)
Ending Balance	12,585	11,963	12,585	11,963
Noncontrolling Interest
Equity And Comprehensive Income [Line Items]
Beginning Balance			571	101
Initial consolidation of noncontrolling interest in Costco Mexico				357
Comprehensive income:
Unrealized gain/(loss) on short-term investments, net of $1 tax			0
Foreign-currency translation adjustment and other			(18)	62
Net income			45	58
Total comprehensive income			27	120
Stock-based compensation			0	0
Stock options exercised including tax effects			0	0
Release of vested restricted stock units (RSUs) including tax effects			0	0
Conversion of convertible notes			0	0
Repurchases of common stock			0	0
Cash dividends declared			0	0
Ending Balance	$ 598	$ 578	$ 598	$ 578

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Fair Value Measurement (Tables)

9 Months Ended

May 06, 2012

Fair value of Financial Assets and Liabilities Measured on Recurring Basis

The tables below present information as of May 6, 2012, and August 28, 2011, respectively, regarding the Company’s financial assets and financial liabilities that are measured at fair value on a recurring basis, and indicate the level within the fair value hierarchy reflecting the valuation techniques utilized to determine such fair value. As of these dates, the Company’s holdings of level 3 financial assets and liabilities were immaterial.

May 6, 2012:	Level 1		Level 2
Money market mutual funds(1)	$	113	$	0
Investment in U.S. government and agency securities(2)		0		940
Investment in corporate notes and bonds(3)		0		69
Investment in FDIC-insured corporate bonds		0		101
Investment in asset and mortgage-backed securities		0		9
Forward foreign exchange contracts, in asset position(4)		0		0
Forward foreign exchange contracts, in (liability) position(4)		0		(3	)
Total	$	113	$	1,116

August 28, 2011:	Level 1		Level 2
Money market mutual funds(1)	$	200	$	0
Investment in U.S. government and agency securities(5)		0		1,177
Investment in corporate notes and bonds		0		7
Investment in FDIC-insured corporate bonds		0		209
Investment in asset and mortgage-backed securities		0		12
Forward foreign exchange contracts, in asset position(4)		0		1
Forward foreign exchange contracts, in (liability) position(4)		0		(2	)
Total	$	200	$	1,404

⁽¹⁾ Included in cash and cash equivalents in the accompanying condensed consolidated balance sheets.

⁽²⁾  $28 and $912 included in cash and cash equivalents and short-term investments, respectively, in the accompanying condensed consolidated balance sheets.

⁽³⁾  $10 and $59 included in cash and cash equivalents and short-term investments, respectively, in the accompanying condensed consolidated balance sheets.

⁽⁴⁾  The asset and the liability values are included in deferred income taxes and other current assets and other current liabilities, respectively, in the accompanying condensed consolidated balance sheets. See Note 1 for additional information on derivative instruments.

⁽⁵⁾  $73 and $1,104 included in cash and cash equivalents and short-term investments, respectively, in the accompanying condensed consolidated balance sheets.