Summary Of Significant Accounting Policies (Policy)

12 Months Ended

Aug. 28, 2011

Summary Of Significant Accounting Policies

Basis of Presentation

The 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 it exercises the right to direct the activities that most significantly impact the entity's performance (Costco or the Company). The Company reports noncontrolling interests in consolidated entities as a component of equity separate from the Company's equity. All material inter-company transactions between and among the Company and its consolidated subsidiaries and other consolidated entities have been eliminated in consolidation.

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 (at the beginning of its fiscal year 2011). As a result of the adoption, the Company determined that its 50%-owned joint venture, Costco Mexico (Mexico), would be consolidated on a prospective basis beginning August 30, 2010. Costco operates 32 warehouses in Mexico similar to Costco warehouses operated elsewhere.

Historically, the Company accounted for its 50% interest in Mexico under the equity method of accounting. The Company's equity method investment in Mexico included in other assets in the accompanying consolidated balance sheet as of August 29, 2010 totaled $357, which was derecognized as part of the initial consolidation of the joint venture on August 30, 2010. Total assets and liabilities increased by approximately 3% due to the initial consolidation and the 50% noncontrolling interest in Mexico of $357 was recorded as a component of equity as a result of the initial consolidation. The initial consolidation of Mexico had no impact on net income or net income per common share attributable to Costco (Net Income). The Company's net income excludes income attributable to noncontrolling interests in its operations in Mexico, Korea, and Taiwan. In December 2010, the Company and its 50% joint venture partner amended the Mexico joint venture agreements. As a result, the Company obtained, subject to certain continuing conditions, majority-voting control of the joint venture. As the Company had previously consolidated the joint venture, these amendments did not impact the Company's consolidated financial statements.

The Company operates 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 August 28, 2011, Costco operated 592 warehouses worldwide which included: 429 U.S. locations (in 40 U.S. states and Puerto Rico), 82 Canadian locations (in nine Canadian provinces), 32 Mexico locations, 22 United Kingdom locations, nine Japan locations, eight Taiwan locations, seven Korea locations, and three Australia locations.

Fiscal Year End

Fiscal Year End

The Company's fiscal year ends on the Sunday closest to August 31. References to 2011, 2010, and 2009 relate to the 52-week fiscal years ended August 28, 2011, August 29, 2010, and August 30, 2009, respectively.

Use Of Estimates

Use of Estimates

The preparation of financial statements in conformity with U.S. generally accepted accounting principles (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 consolidated financial statements.

Cash And Cash Equivalents

Cash and Cash Equivalents

The Company considers as cash and cash equivalents all highly liquid investments with a maturity of three months or less at the date of purchase and proceeds due from credit and debit card transactions with settlement terms of less than one week. Credit and debit card receivables were $982 and $862 at the end of 2011 and 2010, respectively.

Short-Term Investments

Short-term Investments

In general, short-term investments have a maturity of three months to five years at the date of purchase. Investments with maturities beyond five years may be classified, based on the Company's determination, as short-term based on their highly liquid nature and because such marketable securities represent the investment of cash that is available for current operations. Short-term investments classified as available-for-sale are recorded at fair value using the specific identification method with the unrealized gains and losses reflected in accumulated other comprehensive income until realized. Realized gains and losses from the sale of available-for-sale securities, if any, are determined on a specific identification basis and all are recorded in interest income and other, net in the consolidated statements of income. Short-term investments classified as held-to-maturity are financial instruments that the Company has the intent and ability to hold to maturity and are reported net of any related amortization and are not remeasured to fair value on a recurring basis.

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 the presentation of required disclosures, in its consolidated financial statements. 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.

The following valuation techniques are used to measure fair value:

Level 1 primarily consists of financial instruments, such as money market mutual funds, whose value is based on quoted market prices, such as quoted net asset values published by the fund as supported in an active market, exchange-traded instruments and listed equities.

Level 2 includes assets and liabilities where quoted market prices are unobservable but observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities, or could be obtained from data providers or pricing vendors. The Company's Level 2 assets and liabilities primarily include United States (U.S.) government and agency securities, Federal Deposit Insurance Corporation (FDIC) insured corporate bonds, investments in corporate notes and bonds, asset and mortgage-backed securities, and forward foreign exchange contracts. Valuation methodologies are based on "consensus pricing," using market prices from a variety of industry-standard independent data providers or pricing that considers various assumptions, including time value, yield curve, volatility factors, credit spreads, default rates, loss severity, current market and contractual prices for the underlying instruments or debt, broker and dealer quotes, as well as other relevant economic measures. All are observable in the market or can be derived principally from or corroborated by observable market data, for which the Company typically receives independent external valuation information.

Level 3 is comprised of significant unobservable inputs for valuations from the Company's independent data and a primary pricing vendor that are also supported by little, infrequent, or no market activity. Management considers indicators of significant unobservable inputs such as the lengthening of maturities, later-than-scheduled payments, and any remaining individual securities that have otherwise matured, as indicators of Level 3. Assets and liabilities are considered Level 3 when their fair value inputs are unobservable, unavailable or management concludes that even though there may be some observable inputs, an item should be classified as a Level 3 based on other indicators of significant unobservable inputs, such as situations involving limited market activity, where determination of fair value requires significant judgment or estimation. The Company utilizes the services of a primary pricing vendor, which does not provide access to its proprietary valuation models, inputs and assumptions. While the Company is not provided access to proprietary models of the vendor, the Company reviewed and contrasted pricing received with other pricing sources to ensure accuracy of each asset class for which prices are provided. The Company's review also included an examination of the underlying inputs and assumptions for a sample of individual securities across asset classes, credit rating levels and various durations, a process that is continually performed for each reporting period. In addition, the pricing vendor has an established challenge process in place for all security valuations, which facilitates identification and resolution of potentially erroneous prices. The Company believes that the prices received from the primary pricing vendor are representative of exit prices in accordance with authoritative guidance, and are classified appropriately in the fair value hierarchy.

Our current financial liabilities have fair values that approximate their carrying values. Our long-term financial liabilities consist of long-term debt, which is recorded on the balance sheet at issuance price less unamortized discount.

Receivables, Net

Receivables, net

Receivables consist of the following at the end of 2011 and 2010:


	2011			2010
Vendor receivables, and other	$	487		$	448
Reinsurance receivables		201			196
Receivables from governmental entities		98			64
Other receivables		96			103
Third-party pharmacy receivables		86			75
Allowance for doubtful accounts		(3	)		(2	)

Receivables, Net	$	965		$	884

Vendor receivables include payments from vendors in the form of volume rebates or other purchase discounts that are evidenced by signed agreements and are reflected in the carrying value of the inventory when earned or as the Company progresses towards earning the rebate or discount and as a component of merchandise costs as the merchandise is sold. Vendor receivable balances are generally presented on a gross basis separate from any related payable due. In certain circumstances, these receivables may be settled against the related payable to that vendor. Other consideration received from vendors is generally recorded as a reduction of merchandise costs upon completion of contractual milestones, terms of the related agreement, or by other systematic approach.

Reinsurance receivables are held by the Company's wholly-owned captive insurance subsidiary. The receivable balance represents amounts ceded through reinsurance arrangements, and are reflected on a gross basis, separate from the amounts assumed under reinsurance, which are presented on a gross basis within other current liabilities on the consolidated balance sheets.

Receivables from governmental entities largely consists of various tax related items.

Third-party pharmacy receivables generally relate to amounts due from members' insurance companies for the amount above their co-pay, which is collected at the point-of-sale.

Amounts are recorded net of an allowance for doubtful accounts. Management determines the allowance for doubtful accounts based on historical experience and application of the specific identification method. Write-offs of receivables were immaterial for fiscal years 2011, 2010, or 2009.

Merchandise Inventories

Merchandise Inventories

Merchandise inventories consist of the following at the end of 2011 and 2010:


	2011		2010
United States (primarily LIFO)	$	4,548	$	4,150
Foreign (FIFO)		2,090		1,488

Merchandise Inventories	$	6,638	$	5,638

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 estimated effect of inflation or deflation, and these estimates are adjusted to actual results determined at year-end.

Due to inflation in 2011, the merchandise inventories valued at LIFO were lower than the FIFO value, resulting in a charge to merchandise costs of $87. During 2009, due to overall net deflationary trends, the Company recorded a $32 benefit to merchandise costs to adjust inventories valued at LIFO. At the end of 2010, merchandise inventories valued at LIFO approximated FIFO after considering the lower of cost or market principle.

The Company provides for estimated inventory losses between physical inventory counts as a percentage of net sales, using estimates based on the Company's experience. The provision is adjusted periodically to reflect the results of the actual physical inventory counts, which generally occur in the second and fourth fiscal quarters of the fiscal year. Inventory cost, where appropriate, is reduced by estimates of vendor rebates when earned or as the Company progresses towards earning those rebates, provided that they are probable and reasonably estimable.

Property And Equipment

Property and Equipment

Property and equipment are stated at cost. In general, new building additions are separated into components, each with its own estimated useful life. Depreciation and amortization expense is computed using the straight-line method over estimated useful lives or the lease term, if shorter. Leasehold improvements incurred after the beginning of the initial lease term are depreciated over the shorter of the estimated useful life of the asset or the remaining term of the initial lease plus any renewals that are reasonably assured at the date the leasehold improvement is made.

Estimated useful lives for financial reporting purposes are as follows:


		Years

Buildings and improvements		5 - 50

Equipment and fixtures		3- 20

Repair and maintenance costs are expensed when incurred. Expenditures for remodels, refurbishments and improvements that add to or change the way an asset functions or that extend the useful life of an asset are capitalized. Assets that were removed during the remodel, refurbishment or improvement are retired. When assets are retired or sold, the asset costs and related accumulated depreciation are eliminated, with any remaining gain or loss recorded.

Impairment Of Long-Lived Assets

Impairment of Long-Lived Assets

The Company periodically evaluates long-lived assets for impairment when relocating or closing a warehouse or when events or changes in circumstances occur that may indicate the carrying amount of the asset group, generally an individual warehouse, may not be fully recoverable. For asset groups to be held and used, including warehouses to be relocated, the carrying value of the asset group is considered recoverable when the estimated future undiscounted cash flows generated from the use and eventual disposition of the asset group exceed the group's net carrying value. In the event that the carrying value is not considered recoverable, an impairment loss would be recognized for the asset group to be held and used equal to the excess of the carrying value above the estimated fair value of the asset group. For asset groups classified as held for sale (disposal group), the carrying value is compared to the disposal group's fair value less costs to sell. The Company estimates fair value by obtaining market appraisals from third party brokers or other valuation techniques. In 2011, 2010, and 2009, the Company recorded impairment charges of $1, $2, and $11, respectively, included in provision for impaired assets and closing costs, net and interest income and other in the consolidated statements of income. In 2009, the charge was primarily related to the closure of its two Costco Home locations in July 2009.

Assets classified as held for sale were not material as of August 28, 2011 or August 29, 2010.

Other Assets

Other Assets

Other assets consist of the following at the end of 2011 and 2010:


	2011		2010
Prepaid rents, lease costs, and long-term deposits	$	211	$	186
Tax-related assets		179		18
Goodwill, net		74		71
Cash surrender value of life insurance		64		65
Other		95		96
Investment in Mexico		0		357

Other Assets	$	623	$	793

As previously discussed, the Company began consolidating Mexico at the beginning of 2011, on a prospective basis. The amount of retained earnings that represented undistributed earnings of Mexico was $307 at the end of 2010. The Company did not make any capital contributions to its investment in Mexico in 2010 or 2009. The investments and equity in earnings of other unconsolidated joint ventures are not material.

Tax-related assets represent amounts deposited with taxing authorities in connection with ongoing income tax audits and the Company's long term deferred tax assets.

Goodwill resulting from certain business combinations is reviewed for impairment in the fourth quarter of each fiscal year, or more frequently if circumstances dictate. No impairment of goodwill has been incurred to date.

The Company adjusts the carrying value of its employee life insurance contracts to the net cash surrender value at the end of each reporting period.

Accounts Payable

Accounts Payable

The Company's banking system provides for the daily replenishment of major bank accounts as checks are presented. Accordingly, included in accounts payable at the end of 2011 and 2010 are $108 and $617, respectively, representing the excess of outstanding checks over cash on deposit at the banks on which the checks were drawn.

Insurance/Self Insurance Liabilities

Insurance/Self-Insurance Liabilities

The Company uses a combination of insurance and self-insurance mechanisms, including a wholly-owned captive insurance entity and participation in a reinsurance program, to provide for potential liabilities for workers' compensation, general liability, property damage, directors and officers liability, vehicle liability, and employee health care benefits. The reinsurance agreement is one year in duration and new agreements are entered into by each participant at their discretion at the commencement of the next fiscal year. Liabilities associated with the risks that are retained by the Company are not discounted and are estimated, in part, by considering historical claims experience, demographic factors, severity factors, and other actuarial assumptions. The estimated accruals for these liabilities could be significantly affected if future occurrences and claims differ from these assumptions and historical trends. As of the end of 2011 and 2010, these insurance liabilities were $595 and $541 in the aggregate, respectively, and were included in accounts payable, accrued salaries and benefits, and other current liabilities on the consolidated balance sheets, classified based on their nature.

The Company's wholly-owned captive insurance subsidiary (the captive) receives direct premiums, which are netted against the Company's premium costs in selling, general and administrative expenses, in the consolidated statements of income. The captive participates in a reinsurance program that includes other third-party members. The member agreements and practices of the reinsurance program limit any participating members' individual risk. Income statement adjustments related to the reinsurance program and related impacts to the consolidated balance sheets are recognized as information becomes known. In the event the Company leaves the reinsurance program, the Company is not relieved of its primary obligation to the policyholders for activity prior to the termination of the annual agreement.

Other Current Liabilities

Other Current Liabilities

Other current liabilities consist of the following at the end of 2011 and 2010:


	2011		2010
Accrued member rewards	$	602	$	522
Insurance-related liabilities		276		263
Tax-related liabilities		122		79
Cash card liability		112		100
Deferred sales		141		98
Other current liabilities		96		86
Vendor consideration liabilities		66		57
Sales return reserve		74		72
Interest payable		51		51

Other Current Liabilities	$	1,540	$	1,328

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 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 or other entities whose functional currency is other than 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 $247 and $225 at the end of 2011 and 2010, 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 August 28, 2011, and August 29, 2010.

The amount of net foreign-currency transaction gains or losses recognized in interest income and other, net in the accompanying consolidated statements of income relating to forward foreign-exchange contracts were nominal in 2011, 2010 and 2009. These gains and losses are largely offset by the impact of revaluing related foreign currency denominated payables, which are also recognized in interest income and other, net.

The Company is exposed to risks due 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 approximately 36% 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 functional currencies of the Company's international subsidiaries are the local currency of the country in which the subsidiary is located. Assets and liabilities recorded in foreign currencies are translated at the exchange rate on the balance sheet date. Translation adjustments resulting from this process are recorded in accumulated other comprehensive income. Revenues and expenses of the Company's consolidated foreign operations are translated at average rates of exchange prevailing during the year.

The Company recognizes foreign-currency transaction gains and losses related to revaluing all monetary assets and liabilities denominated in currencies other than the functional currency, generally the U.S. dollar payables of consolidated subsidiaries to their functional currency, in interest income and other, net in the accompanying consolidated statements of income. These gains and losses were $8 and $13 in 2011 and 2010, respectively and not significant in 2009.

Revenue Recognition

Revenue Recognition

The Company generally recognizes sales, net of estimated returns, at the time the member takes possession of merchandise or receives services. When the Company collects payments from customers prior to the transfer of ownership of merchandise or the performance of services, the amounts received are generally recorded as deferred sales included in other current liabilities on the consolidated balance sheets until the sale or service is completed. The Company reserves for estimated sales returns based on historical trends in merchandise returns, net of the estimated net realizable value of merchandise inventories to be returned and any estimated disposition costs. Amounts collected from members, which under common trade practices are referred to as sales taxes, are recorded on a net basis.

The Company evaluates whether it is appropriate to record the gross amount of merchandise sales and related costs or the net amount earned as commissions. Generally, when Costco is the primary obligor, is subject to inventory risk, has latitude in establishing prices and selecting suppliers, can influence product or service specifications, or has several but not all of these indicators, revenue is recorded on a gross basis. If the Company is not the primary obligor and does not possess other indicators of gross reporting as noted above, it records the net amounts as commissions earned, which is reflected in net sales.

Membership fee revenue represents annual membership fees paid by substantially all of the Company's members. The Company accounts for membership fee revenue, net of estimated refunds, on a deferred basis, whereby revenue is recognized ratably over the one-year membership period. As previously disclosed, effective with renewals occurring on and after March 1, 2009, the Company changed an element of its membership renewal policy. Memberships renewed within two months after expiration of the current membership year are extended for twelve months from the expiration date. (Under the previous policy, renewals within six months of the expiration date were extended for twelve months from the expiration date.) Memberships renewed more than two months after such expiration date are extended for twelve months from the renewal date. This change has had an immaterial effect of deferring recognition of certain membership fees paid by late-renewing members.

The Company's Executive Members qualify for a 2% reward (up to a maximum of approximately five hundred dollars per year on qualified purchases made at Costco), which can be redeemed at Costco warehouses. The Company accounts for this reward as a reduction in sales, with the related accrued member rewards liability included in other current liabilities on the consolidated balance sheets. The sales reduction and corresponding liability are computed after giving effect to the estimated impact of non-redemptions based on historical data. The net reduction in sales was $790, $688, and $610 in 2011, 2010, and 2009, respectively.

Merchandise Costs

Merchandise Costs

Merchandise costs consist of the purchase price of inventory sold, inbound shipping charges and all costs related to the Company's depot operations, including freight from depots to selling warehouses, and are reduced by vendor consideration. Merchandise costs also include salaries, benefits and depreciation on production equipment in certain fresh foods and ancillary departments.

Selling, General And Administrative Expenses

Selling, General and Administrative Expenses

Selling, general and administrative expenses consist primarily of salaries, benefits and workers' compensation costs for warehouse employees, other than fresh foods departments and certain ancillary businesses, as well as all regional and home office employees, including buying personnel. Selling, general and administrative expenses also include utilities, bank charges, rent and substantially all building and equipment depreciation, as well as other operating costs incurred to support warehouse operations.

Marketing And Promotional Expenses

Marketing and Promotional Expenses

Costco's policy is generally to limit marketing and promotional expenses to new warehouse openings, occasional direct mail marketing to prospective new members and direct mail marketing programs to existing members promoting selected merchandise. Marketing and promotional costs are expensed as incurred and are included in selling, general and administrative expenses in the accompanying consolidated statements of income.

Stock-Based Compensation

Stock-Based Compensation

Compensation expense for all stock-based awards granted is recognized using the straight-line method. The fair value of restricted stock units (RSUs) is calculated as the market value of the common stock on the measurement date less the present value of the expected dividends forgone during the vesting period. The fair value of stock options is measured using the Black-Scholes valuation model. While options and RSUs granted to employees generally vest over five years, all grants allow for either daily or quarterly vesting of the pro-rata number of stock-based awards that would vest on the next anniversary of the grant date in the event of retirement or voluntary termination. The historical experience rate of actual forfeitures has been minimal. As such, the Company does not reduce stock-based compensation for an estimate of forfeitures because the estimate is inconsequential in light of historical experience and considering the awards vest on either a daily or quarterly basis. The impact of actual forfeitures arising in the event of involuntary termination is recognized as actual forfeitures occur, which generally has been infrequent. Stock options have a ten-year term. Stock-based compensation expense is predominately included in selling, general and administrative expenses on the consolidated statements of income. See Note 7 for additional information on the Company's stock-based compensation plans.

Leases

Leases

The Company leases land and/or buildings at warehouses and certain other office and distribution facilities primarily under operating leases. Operating leases expire at various dates through 2051, with the exception of one lease in the Company's United Kingdom subsidiary, which expires in 2151. These leases generally contain one or more of the following options which the Company can exercise at the end of the initial lease term: (a) renewal of the lease for a defined number of years at the then-fair market rental rate or rate stipulated in the lease agreement; (b) purchase of the property at the then-fair market value; or (c) right of first refusal in the event of a third party purchase offer.

The Company accounts for its lease expense with free rent periods and step-rent provisions on a straight-line basis over the original term of the lease, from the date the Company has control of the property. Certain leases provide for periodic rental increases based on the price indices, and some of the leases provide for rents based on the greater of minimum guaranteed amounts or sales volume.

The Company has entered into four capital leases for warehouse locations, expiring at various dates through 2040. Capital lease assets are included in buildings and improvements in the accompanying consolidated balance sheets. Amortization expense on capital lease assets is recorded as depreciation expense and is predominately included in selling, general and administrative expenses. Capital lease liabilities are recorded at the lesser of the estimated fair market value of the leased property or the net present value of the aggregate future minimum lease payments and are included in other current liabilities and other liabilities. Interest on these obligations is included in interest expense.

Preopening Expenses

Preopening Expenses

Preopening expenses related to new warehouses, new regional offices and other startup operations are expensed as incurred.

Provision For Impaired Assets And Closing Costs, Net

Provision for Impaired Assets and Closing Costs, Net

Warehouse closing costs incurred relate principally to expenses associated with the Company's relocation of certain warehouses (that were not otherwise impaired) to larger and better-located facilities. The provisions for 2011, 2010, and 2009 included charges in the amounts indicated below:


	2011		2010		2009
Warehouse closing expenses	$	8	$	6	$	9
Impairment of long-lived assets		1		2		8

Provision for Impaired Assets and Closing Costs, Net	$	9	$	8	$	17

Warehouse closing expenses primarily relate to accelerated building depreciation based on the shortened useful life through the expected closing date and remaining lease obligations, net of estimated sublease income, for leased locations. At the end of 2011 and 2010, the Company's reserve for warehouse closing costs was $5 and primarily related to estimated future lease obligations and other estimated contractual obligations associated with exiting the properties.

Interest Income And Other, Net

Interest Income and Other, Net

Interest income and other, net includes:


	2011		2010		2009
Interest income, net	$	41	$	23	$	27
Earnings of affiliates and other, net		19		65		31

Interest Income and Other, Net	$	60	$	88	$	58

As previously discussed, Costco began consolidating Mexico at the beginning of 2011, on a prospective basis. For 2010 and 2009, the equity in earnings of Mexico is included in interest income and other, net in the accompanying consolidated statements of income, and was $41 and $32, respectively.

Other-Than-Temporary Impairment

The Company periodically evaluates unrealized losses in its investment securities for other-than-temporary impairment using both qualitative and quantitative criteria. In the event a security is deemed to be other-than-temporarily impaired, the Company recognizes the credit loss component in interest income and other, net in the consolidated statements of income. The Company generally only invests in debt securities.

Income Taxes

Income Taxes

The Company accounts for income taxes using the asset and liability method. Under the asset and liability method, deferred tax assets and liabilities are recognized for the future tax consequences attributed to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and tax credits and loss carry-forwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences and carry-forwards are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. A valuation allowance is established when necessary to reduce deferred tax assets to amounts expected to be realized.

The determination of the Company's provision for income taxes requires significant judgment, the use of estimates, and the interpretation and application of complex tax laws. Significant judgment is required in assessing the timing and amounts of deductible and taxable items and the probability of sustaining uncertain tax positions. The benefits of uncertain tax positions are recorded in the Company's consolidated financial statements only after determining a more-likely-than-not probability that the uncertain tax positions will withstand challenge, if any, from tax authorities. When facts and circumstances change, the Company reassesses these probabilities and records any changes in the consolidated financial statements as appropriate. See Note 9 for additional information.

Net Income Attributable To Costco Per Common Share

Net Income Attributable to Costco per Common Share

The computation of basic net income per share uses the weighted average number of shares that were outstanding during the period. The computation of diluted net income per share uses the weighted average number of shares in the basic net income per share calculation plus the number of common shares that would be issued assuming exercise and vesting of all potentially dilutive common shares outstanding using the treasury stock method for shares subject to stock options and restricted stock units and the "if converted" method for the convertible note securities.

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 repurchase price over par value is deducted from additional paid-in capital and retained earnings. See Note 6 for additional information.

Recently Adopted Accounting Pronouncements

Recently Adopted Accounting Pronouncements

As discussed above in Note 1, the Company adopted guidance related to consolidation of variable interest entities.

In October 2009, the FASB issued amended guidance on revenue recognition for multiple-deliverable revenue arrangements. Under this guidance, when vendor-specific objective evidence or third-party evidence for deliverables in an arrangement cannot be determined, a best estimate of the selling price is required to separate deliverables and allocate arrangement consideration using the relative selling-price method. This guidance also prescribes disclosure requirements on how the application of the relative selling price method affects the timing and amount of revenue recognition. The Company adopted this guidance at the beginning of its fiscal year 2011. The adoption of this standard did not have a material impact on the Company's consolidated financial statements.

In January 2010, the FASB issued guidance to amend the disclosure requirements related to recurring and nonrecurring fair value measurements. The guidance requires disclosure of transfers of assets and liabilities between Level 1 and Level 2 of the fair value measurement hierarchy, including the reasons and the timing of the transfers. Under Level 3 of the fair value measurement hierarchy, the guidance requires disclosure of information on purchases, sales, issuances, and settlements on a gross basis (as opposed to a net basis) in the reconciliation of the assets and liabilities measured. The Company adopted this guidance at the beginning of its third quarter of fiscal 2010, except for the Level 3 reconciliation disclosures on the roll-forward activities, which were adopted at the beginning of its third quarter of fiscal 2011. The adoption of this standard did not have a material impact on the Company's consolidated financial statement disclosures.