Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2016

The accompanying consolidated financial statements include the accounts and operations of the Company. All intercompany accounts and transactions have been eliminated. The consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America ("U.S. GAAP"). The preparation of the consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from these estimates and assumptions.

Certain reclassifications have been made to prior-year amounts to conform to the current period presentation.

The Company considers events or transactions that occur after the balance sheet date, but before the financial statements are issued, to provide additional evidence relative to certain estimates or to identify matters that require additional disclosures.

Cost of Revenues Presentation

Cost of revenues presentation

In periods prior to the second quarter of 2016, we presented cost of revenues in our consolidated statements of operations in four financial statement captions: “Cost of sales—product costs,” “Cost of sales—online,” “Cost of sales—software royalties and amortization,” and “Cost of sales—intellectual property licenses.” Since the second quarter of 2016, we have revised the presentation in our consolidated statements of operations to more clearly align our costs of revenues with the associated revenue captions as follows:

Cost of revenues—product sales:


(i)	“Product costs” - includes the manufacturing costs of goods produced and sold. These generally include product costs, manufacturing royalties, net of volume discounts, personnel-related costs, warehousing, and distribution costs. We generally recognize volume discounts when they are earned (typically in connection with the achievement of unit-based milestones).

(ii)

“Software royalties, amortization, and intellectual property licenses” - includes the amortization of capitalized software costs and royalties attributable to product sales revenues. These are costs capitalized on the balance sheet until the respective games are released, at which time the capitalized costs are amortized. Also included is amortization of intangible assets recognized in purchase accounting attributable to product sales revenues.

Cost of revenues—subscription, licensing, and other revenues:


(i)	“Game operations and distribution costs” - includes costs to operate our games, such as customer service, internet bandwidth and server costs, platform provider fee, and payment provider fees.

(ii)

“Software royalties, amortization, and intellectual property licenses” - includes the amortization of capitalized software costs and royalties attributable to subscription, licensing and other revenues. These are costs capitalized on the balance sheet until the respective games are released, at which time the capitalized costs are amortized. Also included is amortization of intangible assets recognized in purchase accounting attributable to subscription, licensing and other revenues.

Prior periods have been reclassified to conform to the current presentation.

Cash and Cash Equivalents

We consider all money market funds and highly liquid investments with original maturities of three months or less at the time of purchase to be "Cash and cash equivalents."

Investment Securities

Investments designated as available-for-sale securities are carried at fair value, which is based on quoted market prices for such securities, if available, or is estimated on the basis of quoted market prices of financial instruments with similar characteristics. Unrealized gains and losses of the Company's available-for-sale securities are excluded from earnings and are reported as a component of "Other comprehensive income (loss)."

Investments with original maturities greater than 90 days and remaining maturities of less than one year are normally classified within "Other current assets." In addition, investments with maturities beyond one year may be classified within "Other current assets" if they are highly liquid in nature and represent the investment of cash that is available for current operations.

The specific identification method is used to determine the cost of securities disposed of, with realized gains and losses reflected in "Interest and other expense (income), net" in our consolidated statements of operations.

Cash in Escrow

As part of the King Acquisition, we were required to deposit $3.56 billion in cash to be held in an escrow account until the earlier of (i) the completion of the King Acquisition, or (ii) the termination of the transaction agreement. The cash was not accessible to the Company for operating cash needs as its use had been administratively restricted for use in the consummation of the King Acquisition. At December 31, 2015, we recorded the balance of the escrow account as a non-current asset, “Cash in escrow,” in our consolidated balance sheet.

Financial Instruments

The carrying amounts of "Cash and cash equivalents," "Accounts receivable, net of allowances," "Accounts payable," and "Accrued expenses and other liabilities" approximate fair value due to the short-term nature of these accounts. Our investments in the United States of America ("U.S.") treasuries, government agency securities, and corporate bonds, if any, are carried at fair value, which is based on quoted market prices for such securities, if available, or is estimated on the basis of quoted market prices of financial instruments with similar characteristics.

The Company transacts business in various foreign currencies and has significant international sales and expenses denominated in foreign currencies, subjecting us to foreign currency risk. To mitigate our foreign currency risk resulting from our foreign currency-denominated monetary assets, liabilities and earnings and our foreign currency risk related to functional currency-equivalent cash flows resulting from our intercompany transactions, we periodically enter into currency derivative contracts, principally forward contracts. These forward contracts generally have a maturity of less than one year. The counterparties for our currency derivative contracts are large and reputable commercial or investment banks.

We assess the nature of these derivatives under Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") Topic 815 to determine whether such derivatives should be designated as hedging instruments. The fair value of foreign currency contracts are estimated based on the prevailing exchange rates of the various hedged currencies as of the end of the period. We report the fair value of these contracts within “Other current assets,” “Accrued expense and other liabilities,” “Other assets,” or “Other liabilities,” as applicable, in our consolidated balance sheets based on the prevailing exchange rates of the various hedged currencies as of the end of the relevant period.

We do not hold or purchase any foreign currency forward contracts for trading or speculative purposes.

For foreign currency forward contracts entered into to mitigate risk from foreign currency-denominated monetary assets, liabilities, and earnings that are not designated as hedging instruments under ASC 815, changes in the estimated fair value of these derivatives are recorded within “General and administrative expenses” and “Interest and other expense, net” in our consolidated statements of operations, consistent with the nature of the underlying transactions.

For foreign currency forward contracts that we entered into to hedge forecasted intercompany cash flows that are subject to foreign currency risk and which have been designated as cash flow hedges in accordance with ASC 815, we assess the effectiveness of these cash flow hedges at inception and on an ongoing basis and determine if the hedges are effective at providing offsetting changes in cash flows of the hedged items. The Company records the effective portion of changes in the estimated fair value of these derivatives in "Accumulated other comprehensive loss" and subsequently reclassifies the related amount of accumulated other comprehensive loss to earnings within "General and administrative" or "Net revenues" when the hedged item impacts earnings, consistent with the nature and timing of the underlying transactions. Cash flows from these foreign currency forward contracts are classified in the same category as the cash flows associated with the hedged item in the consolidated statements of cash flows. We measure hedge ineffectiveness, if any, and if it is determined that a derivative has ceased to be a highly effective hedge, the Company will discontinue hedge accounting for the derivative.

Concentration of Credit Risk

Our concentration of credit risk relates to depositors holding the Company's cash and cash equivalents and customers with significant accounts receivable balances.

Our cash and cash equivalents are invested primarily in money market funds consisting of short-term, high-quality debt instruments issued by governments and governmental organizations, financial institutions and industrial companies.

Our customer base includes retailers and distributors, including mass-market retailers, consumer electronics stores, discount warehouses, and game specialty stores in the U.S. and other countries worldwide. We perform ongoing credit evaluations of our customers and maintain allowances for potential credit losses. We generally do not require collateral or other security from our customers.

For the year ended December 31, 2016, we had two customers, Sony Interactive Entertainment, Inc. ("Sony") and Apple, Inc., who each accounted for 13% of net revenues. For the year ended December 31, 2015, we had two customers, Sony and Microsoft Corporation ("Microsoft"), who accounted for 12% and 10%, respectively, of net revenues. We did not have any single customer that accounted for 10% or more of net revenues for the year ended December 31, 2014.

We had three customers—Sony, Microsoft, and Wal-Mart Stores, Inc.—who accounted for 17%, 10%, and 10%, respectively, of consolidated gross receivables at December 31, 2016, and 18%, 13%, and 11%, respectively, of consolidated gross receivables at December 31, 2015.

Software Development Costs and Intellectual Property Licenses

Software development costs include payments made to independent software developers under development agreements, as well as direct costs incurred for internally developed products. Software development costs are capitalized once technological feasibility of a product is established and such costs are determined to be recoverable. Technological feasibility of a product requires both technical design documentation and game design documentation, or the completed and tested product design and a working model. Significant management judgments and estimates are utilized in the assessment of when technological feasibility is established and the evaluation is performed on a product-by-product basis. For products where proven technology exists, this may occur early in the development cycle. Software development costs related to hosted service revenue arrangements are capitalized after the preliminary project phase is complete and it is probable that the project will be completed and the software will be used to perform the function intended. Prior to a product's release, if and when we believe capitalized costs are not recoverable, we expense the amounts as part of "Cost of revenues — software royalties, amortization, and intellectual property licenses." Capitalized costs for products that are canceled or are expected to be abandoned are charged to "Product development" in the period of cancellation. Amounts related to software development which are not capitalized are charged immediately to "Product development."

Commencing upon a product's release, capitalized software development costs are amortized to "Cost of revenues — software royalties, amortization, and intellectual property licenses" based on the ratio of current revenues to total projected revenues for the specific product, generally resulting in an amortization period of six months to approximately two years.

Intellectual property license costs represent license fees paid to intellectual property rights holders for use of their trademarks, copyrights, software, technology, music or other intellectual property or proprietary rights in the development of our products. Depending upon the agreement with the rights holder, we may obtain the right to use the intellectual property in multiple products over a number of years, or alternatively, for a single product. Prior to a product's release, if and when we believe capitalized costs are not recoverable, we expense the amounts as part of "Cost of revenues — software royalties, amortization, and intellectual property licenses." Capitalized intellectual property costs for products that are canceled or are expected to be abandoned are charged to "Product development" in the period of cancellation.

Commencing upon a product's release, capitalized intellectual property license costs are amortized to "Cost of revenues — software royalties, amortization, and intellectual property licenses" based on the ratio of current revenues for the specific product to total projected revenues for all products in which the licensed property will be utilized. As intellectual property license contracts may extend for multiple years and can be used in multiple products to be released over a period beyond one year, the amortization of capitalized intellectual property license costs relating to such contracts may extend beyond one year.

We evaluate the future recoverability of capitalized software development costs and intellectual property licenses on a quarterly basis. For products that have been released in prior periods, the primary evaluation criterion is the actual performance of the title to which the costs relate. For products that are scheduled to be released in future periods, recoverability is evaluated based on the expected performance of the specific products to which the costs relate or in which the licensed trademark or copyright is to be used. Criteria used to evaluate expected product performance include: historical performance of comparable products developed with comparable technology; market performance of comparable titles; orders for the product prior to its release; general market conditions; and, for any sequel product, estimated performance based on the performance of the product on which the sequel is based. Further, as many of our capitalized intellectual property licenses extend for multiple products over multiple years, we also assess the recoverability of capitalized intellectual property license costs based on certain qualitative factors, such as the success of other products and/or entertainment vehicles utilizing the intellectual property, whether there are any future planned theatrical releases or television series based on the intellectual property, and the rights holder's continued promotion and exploitation of the intellectual property.

Significant management judgments and estimates are utilized in assessing the recoverability of capitalized costs. In evaluating the recoverability of capitalized costs, the assessment of expected product performance utilizes forecasted sales amounts and estimates of additional costs to be incurred. If revised forecasted or actual product sales are less than the originally forecasted amounts utilized in the initial recoverability analysis, the net realizable value may be lower than originally estimated in any given quarter, which could result in an impairment charge. Material differences may result in the amount and timing of expenses for any period if matters resolve in a manner that is inconsistent with management's expectations.

Inventories

Inventories consist of materials (including manufacturing royalties paid to console manufacturers), labor, and freight-in and are stated at the lower of cost (weighted-average method) or net realizable value. Inventories are relieved on a weighted-average cost method.

Long-Lived Assets

Property and Equipment. Property and equipment are recorded at cost and depreciated on a straight-line basis over the estimated useful life (i.e., 25 to 33 years for buildings, and 2 to 5 years for computer equipment, office furniture and other equipment) of the asset. When assets are retired or disposed of, the cost and accumulated depreciation thereon are removed and any resulting gains or losses are included in the consolidated statements of operations. Leasehold improvements are amortized using the straight-line method over the estimated life of the asset, not to exceed the length of the lease. Repair and maintenance costs are expensed as incurred.

Goodwill and Other Indefinite-Lived Assets

Goodwill and Other Indefinite-Lived Assets. We account for goodwill in accordance with ASC Topic 350. Under ASC Topic 350, goodwill is considered to have an indefinite life, and is carried at cost. Acquired trade names are assessed as indefinite lived assets if there is no foreseeable limits on the periods of time over which they are expected to contribute cash flows. Goodwill and indefinite-lived assets are not amortized, but are subject to an annual impairment test, as well as between annual tests when events or circumstances indicate that the carrying value may not be recoverable. We perform our annual impairment testing at December 31.

Our annual goodwill impairment test is performed at the reporting unit level. We have determined our reporting units based on the guidance within ASC Subtopic 350-20. As of December 31, 2016 and 2015, our reporting units are the same as our operating segments. We test goodwill for possible impairment by first determining the fair value of the related reporting unit and comparing this value to the recorded net assets of the reporting unit, including goodwill. The fair value of our reporting units is determined using an income approach based on discounted cash flow models. In the event the recorded net assets of the reporting unit exceed the estimated fair value of such assets, we perform a second step to measure the amount of the impairment, which is equal to the amount by which the recorded goodwill exceeds the implied fair value of the goodwill after assessing the fair value of each of the assets and liabilities within the reporting unit. We have determined that no impairment has occurred at December 31, 2016, 2015 and 2014 based upon a set of assumptions regarding discounted future cash flows, which represent our best estimate of future performance at this time.

We test indefinite-lived acquired trade names for possible impairment by using a discounted cash flow model to estimate fair value. We have determined that no impairment has occurred at December 31, 2016, 2015 and 2014 based upon a set of assumptions regarding discounted future cash flows, which represent our best estimate of future performance at this time.

Changes in our assumptions underlying our estimates of fair value, which will be a function of our future financial performance and changes in economic conditions, could result in future impairment charges.

Amortizable Intangible Assets

Amortizable Intangible Assets. Intangible assets subject to amortization are carried at cost less accumulated amortization, and amortized over the estimated useful life in proportion to the economic benefits received.

We evaluate the recoverability of our identifiable intangible assets and other long-lived assets in accordance with ASC Subtopic 360-10, which generally requires the assessment of these assets for recoverability when events or circumstances indicate a potential impairment exists. We considered certain events and circumstances in determining whether the carrying value of identifiable intangible assets and other long-lived assets, other than indefinite-lived intangible assets, may not be recoverable including, but not limited to: significant changes in performance relative to expected operating results; significant changes in the use of the assets; significant negative industry or economic trends; a significant decline in our stock price for a sustained period of time; and changes in our business strategy. If we determine that the carrying value may not be recoverable, we estimate the undiscounted cash flows to be generated from the use and ultimate disposition of these assets to determine whether an impairment exists. If an impairment is indicated based on a comparison of the assets' carrying values and the undiscounted cash flows, the impairment loss is measured as the amount by which the carrying amount of the assets exceeds the fair value of the assets. We did not record an impairment charge to our definite-lived intangible assets as of December 31, 2016, 2015, and 2014.

Revenue Recognition

We recognize revenues when there is persuasive evidence of an arrangement, the product or service has been provided to the customer, the collection of our fees is reasonably assured and the amount of fees to be paid by the customer is fixed or determinable. Certain products are sold to customers with a "street date" (which is the earliest date these products may be sold by retailers). For these products, we recognize revenues on the later of the street date or the date the product is sold to the customer. Revenues are recorded net of taxes assessed by governmental authorities that are both imposed on and concurrent with the specific revenue-producing transaction between us and our customer, such as sales and value-added taxes.

Revenue Arrangements with Multiple Deliverables

Certain of our revenue arrangements have multiple deliverables, which we account for in accordance with ASC Topic 605. These revenue arrangements include product sales consisting of both software, service (such as ongoing hosting arrangements), and hardware deliverables (such as peripherals or other ancillary collectors' items sold together with physical "boxed" software).

When a revenue arrangement contains multiple elements, such as hardware and software products, licenses and/or services, we allocate revenue to each element based on a selling price hierarchy. The selling price for a deliverable is based on its vendor-specific objective evidence ("VSOE") if it is available, third-party evidence ("TPE") if VSOE is not available, or best estimated selling price ("BESP") if neither VSOE nor TPE is available. In multiple element arrangements where more-than-incidental software deliverables are included, revenue is allocated to each separate unit of accounting for each of the non-software deliverables and to the software deliverables as a group using the relative selling prices of each of the deliverables in the arrangement based on the aforementioned selling price hierarchy. Further, if the arrangement contains more than one software deliverable, the arrangement consideration allocated to the software deliverables as a group is then allocated to each software deliverable using the guidance for recognizing software revenue.

As noted above, when neither VSOE nor TPE is available for a deliverable, we use BESP. We did not have significant revenue arrangements that required using BESP for the years ended December 31, 2016, 2015, and 2014. The inputs we use to determine the selling price of our significant deliverables include the actual price charged by the Company for deliverables that the Company sells separately (which represents VSOE) and the wholesale prices of the same or similar products for deliverables not sold separately (which represents TPE).

Product Sales

Product sales consist of sales of our games, including physical products and digital full-game downloads. We recognize revenues from the sale of our products after both (1) title and risk of loss have been transferred to our customers and (2) all performance obligations have been completed. With respect to digital full-game downloads, this is when the product is available for download or is activated for gameplay. Revenues from product sales are recognized after deducting the estimated allowance for returns and price protection. Sales incentives and other consideration given by us to our customers, such as rebates and product placement fees, are considered adjustments of the selling price of our products and are reflected as reductions to revenues. Sales incentives and other consideration that represent costs incurred by us for assets or services received, such as the appearance of our products in a customer's national circular ad, are reflected as sales and marketing expenses when the benefit from the sales incentive is separable from sales to the same customer and we can reasonably estimate the fair value of the benefit.

Products with Online Functionality or Hosted Service Arrangements

For our software products with online functionality or that are part of a hosted service agreement, we evaluate whether that online functionality constitutes a more-than- inconsequential separate deliverable in addition to the software product. This evaluation is performed for each software product or product add-on (including downloadable content), when it is released. Determining whether the online functionality for a particular product constitutes a more-than-inconsequential deliverable is subjective and requires management's judgment. When we determine that the online functionality constitutes a more-than-inconsequential separate service deliverable in addition to the product, which is principally because of the online functionality's importance to gameplay, we consider our performance obligation for this title to extend beyond the sale of the game. In addition, VSOE of fair value does not exist for the online functionality of some products, as we do not separately charge for this component. As a result, we initially defer all of the software-related revenues from the sale of any such title (including downloadable content) and recognize the revenues ratably over the estimated service period of the title. In addition, we initially defer the cost of revenues for the title and recognize the costs of sales as the related revenues are recognized. The cost of revenues that are initially deferred include manufacturing costs, software royalties and amortization, and intellectual property licenses and exclude intangible asset amortization.

For our software products with online functionality that we consider to be incidental to the overall product offering and are inconsequential deliverables, we recognize the related revenues when the revenue recognition criteria described above have been met.

For our World of Warcraft boxed products, expansion packs and value-added services, we recognize revenues in each case with the related subscription service revenues ratably over the estimated service period, beginning upon the activation of the software and delivery of the related services. Revenues attributed to the sale of World of Warcraft boxed software and related expansion packs are classified as "Product sales," whereas revenues attributable to subscriptions and other value-added services are classified as "Subscription, licensing, and other revenues."

Subscription Revenues

Subscription revenues are mostly derived from World of Warcraft. World of Warcraft is a game that is playable through Blizzard's servers and is generally sold on a subscription-only basis.

For World of Warcraft, after the first month of free usage that is included with the World of Warcraft boxed software, the World of Warcraft end user may enter into a subscription agreement for additional future access. Revenues associated with the sales of subscriptions via boxed software and prepaid subscription cards, as well as prepaid subscriptions sales, are deferred until the subscription service is activated by the consumer and are then recognized ratably over the subscription period. Value-added service revenues associated with subscriptions are recognized ratably over the estimated service periods.

Licensing Revenues

In certain countries, we utilize third-party licensees to distribute and host our games in accordance with license agreements, for which the licensees pay the Company a royalty. We recognize these royalties as revenues based on usage by the end user and over the estimated service period when we have continuing service obligations. We recognize any upfront licensing fees received over the term of the agreements.

With respect to license agreements that provide customers the right to make multiple copies in exchange for guaranteed amounts, revenues are generally recognized upon delivery of a master copy if all other performance obligations have been completed or over the estimated service period when we have continuing service obligations. Per copy royalties on sales that exceed the guarantee are recognized as earned. In addition, persuasive evidence of an arrangement must exist and collection of the related receivable must be probable.

Other Revenues

Other revenues primarily include revenues from digital downloadable content (e.g., multi-player content packs), microtransactions and the licensing of intellectual property other than software to third-parties.

Microtransaction revenues are derived from the sale of virtual goods and currencies to our players to enhance their gameplay experience. Proceeds from the sales of virtual goods and currencies are initially recorded in deferred revenues. Proceeds from the sales of virtual currencies are recognized as revenues when a player uses the virtual goods purchased with the virtual currency. Proceeds from the sales of virtual goods directly are also recognized as revenues when a player uses the virtual goods. We categorize our virtual goods as either consumable or durable. Consumable virtual goods represent goods that can be consumed by a specific player action; accordingly, we recognize revenues from the sale of consumable virtual goods as the goods are consumed. Durable virtual goods represent goods that are accessible to the player over an extended period of time; accordingly, we recognize revenues from the sale of durable virtual goods ratably over the period of time the goods are available to the player, which is generally the estimated service period of the game.

Revenues from the licensing of intellectual property other than software to third-parties are recorded upon the receipt of licensee statements, or upon the receipt of cash, provided the license period has begun and all performance obligations have been completed.

Estimated Service Period

We determine the estimated service period for players of our games with consideration of various data points, including the weighted average number of days between players' first and last days played online, the average total hours played, the average number of days in which player activity stabilizes, and the weighted-average number of days between players' first purchase date and last date played online. We also consider known online trends, the service periods of our previously released games, and the service periods of our competitors' games that are similar in nature to ours, to the extent they are publicly available. Determining the estimated service period is subjective and requires management's judgment. Future usage patterns may differ from historical usage patterns and therefore the estimated service period may change in the future. The estimated service periods for players of our current games are generally less than 12 months.

Allowances for Returns, Price Protection, Doubtful Accounts, and Inventory Obsolescence

Allowances for Returns, Price Protection, and Doubtful Accounts

We closely monitor and analyze the historical performance of our various titles, the performance of products released by other publishers, market conditions, and the anticipated timing of other releases to assess future demand of current and upcoming titles. Initial volumes shipped upon title launch and subsequent reorders are evaluated with the goal of ensuring that quantities are sufficient to meet the demand from the retail markets, but at the same time are controlled to prevent excess inventory in the channel. We benchmark units to be shipped to our customers using historical and industry data.

We may permit product returns from, or grant price protection to, our customers under certain conditions. In general, price protection refers to the circumstances in which we elect to decrease, on a short- or longer-term basis, the wholesale price of a product by a certain amount and, when granted and applicable, allow customers a credit against amounts owed by such customers to us with respect to open and/or future invoices. The conditions our customers must meet to be granted the right to return products or receive price protection credits include, among other things, compliance with applicable trading and payment terms and consistent return of inventory and delivery of sell-through reports to us. We may also consider other factors, including achievement of sell-through performance targets in certain instances, the facilitation of slow-moving inventory, and other market factors.

Significant management judgments and estimates with respect to potential future product returns and price protection related to current period product revenues must be made and used when establishing the allowance for returns and price protection in any accounting period. We estimate the amount of future returns and price protection for current period product revenues utilizing historical experience and information regarding inventory levels and the demand and acceptance of our products by the end consumer. The following factors are used to estimate the amount of future returns and price protection for a particular title: historical performance of titles in similar genres; historical performance of the hardware platform; historical performance of the franchise; console hardware life cycle; sales force and retail customer feedback; industry pricing; future pricing assumptions; weeks of on-hand retail channel inventory; absolute quantity of on-hand retail channel inventory; our warehouse on-hand inventory levels; the title's recent sell-through history (if available); marketing trade programs; and the performance of competing titles. The relative importance of these factors varies among titles depending upon, among other things, genre, platform, seasonality, and sales strategy.

Based upon historical experience, we believe that our estimates are reasonable. However, actual returns and price protection could vary materially from our allowance estimates due to a number of reasons, including, among others: a lack of consumer acceptance of a title, the release in the same period of a similarly themed title by a competitor, or technological obsolescence due to the emergence of new hardware platforms. There may be material differences in the amount and timing of our revenues for any period if factors or market conditions change or if matters resolve in a manner that is inconsistent with management's assumptions utilized in determining the allowances for returns and price protection.

Similarly, management must make estimates as to the collectability of our accounts receivable. In estimating the allowance for doubtful accounts, we analyze the age of current outstanding account balances, historical bad debts, customer concentrations, customer creditworthiness, current economic trends, and changes in our customers' payment terms and their economic condition, as well as whether we can obtain sufficient credit insurance. Any significant changes in any of these criteria would affect management's estimates in establishing our allowance for doubtful accounts.

Allowance for Inventory Obsolescence

We regularly review inventory quantities on-hand and in the retail channels. We write down inventory based on excess or obsolete inventories determined primarily by future anticipated demand for our products. Inventory write-downs are measured as the difference between the cost of the inventory and net realizable value, based upon assumptions about future demand, which are inherently difficult to assess and dependent on market conditions. At the point of a loss recognition, a new, lower cost basis for that inventory is established, and subsequent changes in facts and circumstances do not result in the restoration or increase in that newly established basis.

Shipping and Handling

Shipping and handling costs, which consist primarily of packaging and transportation charges incurred to move finished goods to customers, are included in "Cost of revenues—product costs."

Advertising Expenses

We expense advertising as incurred, except for production costs associated with media advertising, which are deferred and charged to expense when the related advertisement is run for the first time. Advertising expenses for the years ended December 31, 2016, 2015, and 2014 were $641 million, $523 million, and $495 million, respectively, and are included in "Sales and marketing" in the consolidated statements of operations.

Income Taxes

We record a tax provision for the anticipated tax consequences of the reported results of operations. In accordance with ASC Topic 740, the provision for income taxes is computed using the asset and liability method, under which deferred tax assets and liabilities are recognized for the expected future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating losses and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which the temporary differences 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. We evaluate deferred tax assets each period for recoverability. For those assets that do not meet the threshold of "more likely than not" that they will be realized in the future, a valuation allowance is recorded.

We report a liability for unrecognized tax benefits resulting from uncertain tax positions taken or expected to be taken in a tax return. We recognize interest and penalties, if any, related to unrecognized tax benefits in "Income tax expense."

Foreign Currency Translation

All assets and liabilities of our foreign subsidiaries who have a functional currency other than U.S. dollars are translated into U.S. dollars at the exchange rate in effect at the balance sheet date, and revenue and expenses are translated at average exchange rates during the period. The resulting translation adjustments are reflected as a component of "Accumulated other comprehensive loss" in shareholders' equity.

Earnings Per Common Share

"Basic earnings per common share" is computed by dividing income (loss) available to common shareholders by the weighted-average number of common shares outstanding for the periods presented. "Diluted earnings per share" is computed by dividing income (loss) available to common shareholders by the weighted-average number of common shares outstanding, increased by the weighted-average number of common stock equivalents. Common stock equivalents are calculated using the treasury stock method and represent incremental shares issuable upon exercise of our outstanding options. However, potential common shares are not included in the denominator of the diluted earnings (loss) per share calculation when inclusion of such shares would be anti-dilutive, such as in a period in which a net loss is recorded.

When we determine whether instruments granted in share-based payment transactions are participating securities, unvested share-based awards which include the right to receive non-forfeitable dividends or dividend equivalents are considered to participate with common stock in undistributed earnings. With participating securities, we are required to calculate basic and diluted earnings per common share amounts under the two-class method. The two-class method excludes from the earnings per common share calculation any dividends paid or owed to participating securities and any undistributed earnings considered to be attributable to participating securities.

Share-Based Payments

We account for share-based payments in accordance with ASC Subtopic 718-10 and ASC Subtopic 505-50. Share-based compensation expense for a given grant is recognized over the requisite service period (that is, the period for which the employee is being compensated) and is based on the value of share-based payment awards after a reduction for estimated forfeitures. Forfeitures are estimated at the time of grant and are revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates.

We generally estimate the value of stock options using a binomial-lattice model. This estimate is affected by our stock price, as well as assumptions regarding a number of highly complex and subjective variables, including our expected stock price volatility over the term of the awards, and actual and projected employee stock option exercise behaviors.

We generally determine the fair value of restricted stock rights based on the closing market price of the Company's common stock on the date of grant, reduced by the present value of the estimated future dividends during the vesting period in which the restricted stock rights holder will not participate. Certain restricted stock rights granted to our employees and senior management vest based on the achievement of pre-established performance or market conditions. For performance-based restricted stock rights, each quarter we update our assessment of the probability that the specified performance criteria will be achieved. We amortize the fair values of performance-based restricted stock rights over the requisite service period, adjusting for estimated forfeitures for each separately vesting tranche of the award. For market-based restricted stock rights, we estimate the fair value at the date of grant using a Monte Carlo valuation methodology and amortize those fair values over the requisite service period, adjusting for estimated forfeitures for each separately vesting tranche of the award. The Monte Carlo methodology that we use to estimate the fair value of market-based restricted stock rights at the date of grant incorporates into the valuation the possibility that the market condition may not be satisfied. Provided that the requisite service is rendered, the total fair value of the market-based restricted stock rights at the date of grant must be recognized as compensation expense even if the market condition is not achieved. However, the number of shares that ultimately vest can vary significantly with the performance of the specified market criteria.

For share-based compensation grants that are liability classified, we update our grant date valuation at each reporting period and recognize a cumulative catch-up adjustment for changes in the value related to the requisite service already rendered.

Loss Contingencies

ASC Topic 450 governs the disclosure of loss contingencies and accrual of loss contingencies in respect of litigation and other claims. We record an accrual for a potential loss when it is probable that a loss will occur and the amount of the loss can be reasonably estimated. When the reasonable estimate of the potential loss is within a range of amounts, the minimum of the range of potential loss is accrued, unless a higher amount within the range is a better estimate than any other amount within the range. Moreover, even if an accrual is not required, we provide additional disclosure related to litigation and other claims when it is reasonably possible (i.e., more than remote) that the outcomes of such litigation and other claims include potential material adverse impacts on us.

Recently Issued Accounting Pronouncements

Recently adopted accounting pronouncements

Share-based compensation

In June 2014, the FASB issued new guidance related to share-based compensation. The new standard requires that a performance target that affects vesting, and that could be achieved after the requisite service period, be treated as a performance condition. As such, the performance target should not be reflected in estimating the grant date fair value of the award. This update further clarifies that compensation cost should be recognized in the period in which it becomes probable that the performance target will be achieved and should represent the compensation cost attributable to the periods for which the requisite service has already been rendered. We adopted this new standard as of January 1, 2016, and applied it prospectively. The adoption of this guidance did not have a material impact on our consolidated financial statements.

Consolidations

In February 2015, the FASB issued new guidance related to consolidations. The new standard amends certain requirements for determining whether a variable interest entity must be consolidated. We adopted this new standard as of January 1, 2016. The adoption of this guidance did not have a material impact on our consolidated financial statements.

Debt Issuance Costs

In April 2015, the FASB issued new guidance related to the presentation of debt issuance costs in financial statements. The new standard requires an entity to present such costs in the balance sheet as a direct deduction from the related debt liability rather than as an asset. Amortization of the costs will continue to be reported as interest expense. We adopted this change in accounting principle as of January 1, 2016, and applied it retrospectively for each period presented. The adoption of this guidance did not have a material impact on our consolidated financial statements.

Internal-Use Software

In April 2015, the FASB issued new guidance related to internal-use software. The new standard relates to a customer’s accounting for fees paid in cloud computing arrangements. The amendment provides guidance for customers to determine whether such arrangements include software licenses. If a cloud arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. We adopted this standard as of January 1, 2016, and applied it prospectively. The adoption of this guidance did not have a material impact on our consolidated financial statements.

Business Combinations

In September 2015, the FASB issued new guidance related to business combinations. The new standard requires that the cumulative impact of a measurement period adjustment, including the impact on prior periods, on provisional amounts recorded at the acquisition date as a result of the business combination be recognized in the reporting period the adjustment is identified. The standard also requires separate presentation on the face of the income statement, or disclosure in the notes, of the portion of the amount recorded in current period earnings by line item. Prior to the issuance of the standard, such adjustments to provisional amounts were recognized retrospectively. We adopted this new standard as of January 1, 2016, and applied it prospectively. No measurement period adjustments impacting earnings occurred as of and for the year ended December 31, 2016.

Share-Based Payments

In March 2016, the FASB issued new guidance to simplify accounting for share-based payments. The new standard, amongst other things:


•	requires that all excess tax benefits and tax deficiencies be recorded as an income tax expense or benefit in the consolidated statement of operations and that the tax effects of exercised or vested awards be treated as discrete items in the reporting period in which they occur;


•	requires excess tax benefits from share-based payments to be reported as operating activities on the statement of cash flows; and


•	permits an accounting policy election to either estimate the number of awards that are expected to vest using an estimated forfeiture rate, as currently required, or account for forfeitures when they occur.

We elected to early adopt this new standard in the third quarter of 2016, which requires us to reflect any adjustments as of January 1, 2016. As part of the adoption, we made certain elections, including the following:


•	to apply the presentation requirements for our consolidated statement of cash flows related to excess tax benefits retrospectively to all periods presented; and


•	to continue to estimate the number of awards that are expected to vest using an estimated forfeiture rate.

As a result of the adoption, we recognized excess tax benefits of $81 million as a reduction to income tax expense in our consolidated statement of operations for the year ended December 31, 2016. Further, given our retrospective application of the presentation requirements for our consolidated statement of cash flows related to excess tax benefits, our net cash provided by operating activities and net cash used in financing activities increased by $67 million and $39 million for the years ended December 31, 2015, and December 31, 2014, respectively. The other provisions of the standard did not have a material impact on our consolidated financial statements.

Statement of Cash Flows

In August 2016, the FASB issued new guidance related to the classification of certain cash items in the statement of cash flows. The new standard requires, among other things, that cash payments for debt prepayment or debt extinguishment costs should be classified as cash outflows for financing activities, as opposed to operating activities as is required under existing guidance. We elected to early adopt this standard in the third quarter of 2016 and applied it retrospectively. As a result of the adoption of this standard, our cash flows from financing activities for the year ended December 31, 2016 included the $63 million premium payment from the October 19, 2016 redemption of our Original 2021 Notes. The adoption of this standard did not have a material impact on our consolidated statements of cash flows upon adoption for the years ended December 31, 2015 and 2014.

Recent accounting pronouncements not yet adopted

Revenue recognition

In May 2014, the FASB issued new accounting guidance related to revenue recognition. The new standard will replace all current U.S. GAAP guidance on this topic and eliminate all industry-specific guidance, providing a unified model to determine when and how revenue is recognized. The core principle is that a company should recognize revenue upon the transfer of promised goods or services to customers in an amount that reflects the consideration the company expects to be entitled to in exchange for those goods or services. This guidance will be effective for fiscal years and interim periods within those years beginning after December 15, 2017, and can be applied either retrospectively to each period presented or as a cumulative-effect adjustment as of the date of adoption. We are evaluating the adoption method, as well as the impact of this new accounting guidance on our financial statements and related disclosures. As previously disclosed, we believe the adoption of the new revenue recognition standard may have a significant impact on the accounting for our sales of our games with significant online functionality for which we do not have VSOE for unspecified future updates and ongoing online services provided. Under the current accounting standards, VSOE for undelivered elements is required. This requirement will be eliminated under the new standard. Accordingly, we may be required to recognize as revenue a portion of the sales price upon delivery of the software, as compared to the current requirement of recognizing the entire sales price ratably over an estimated offering period. This potential difference may have a material impact on our consolidated financial statements upon adoption of this new guidance. As accounting implementation guidance and clarifications regarding this matter are still evolving, we continue to evaluate the impact this guidance will have on our consolidated financial statements and related disclosures.

Leases

In February 2016, the FASB issued new guidance related to the accounting for leases. The new standard will replace all current U.S. GAAP guidance on this topic. The new standard, among other things, requires a lessee to classify a lease as either an operating or financing lease and lessees will need to recognize a lease liability and a right-of-use asset for their leases. The liability will be equal to the present value of lease payments. The asset will be based on the liability, subject to adjustment for initial direct costs, lease incentives received and any prepaid lease payments. Operating leases will result in straight-line expense, while finance leases will result in a front-loaded expense pattern. Classification will be based on criteria that are largely similar to those applied in current lease accounting. The standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. Early adoption is permitted. The new standard must be adopted using a modified retrospective transition and will require application of the new guidance at the beginning of the earliest comparative period presented. We are evaluating the impact of this new accounting guidance on our consolidated financial statements.

Inventory

In July 2015, the FASB issued new guidance related to the measurement of inventory which requires inventory within the scope of the guidance to be measured at the lower of cost and net realizable value. Net realizable value is defined as the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. The new standard is effective for fiscal years beginning after December 15, 2016 and should be applied prospectively. Early adoption is permitted. The impact this new standard is not expected to have a material impact on our consolidated financial statements.

Financial Instruments

In January 2016, the FASB issued new guidance related to the recognition and measurement of financial assets and financial liabilities. The new standard, amongst other things, generally requires companies to measure investments in other entities, except those accounted for under the equity method, at fair value and recognize any changes in fair value in net income. The new standard also simplifies the impairment assessment of equity investments without readily determinable fair values. The new standard is effective for fiscal years beginning after December 15, 2017, and the guidance should be applied by means of a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption. The amendments related to equity investments without readily determinable fair values (including disclosure requirements) should be applied prospectively to equity investments that exist as of the date of adoption. We are evaluating the impact, if any, of adopting this new accounting guidance on our financial statements.

Statement of Cash Flows - Restricted Cash

In November 2016, the FASB issued new guidance related to the classification of restricted cash in the statement of cash flows. The new standard requires that a statement of cash flows explain any change during the period in total cash, cash equivalents, and restricted cash. Therefore, restricted cash will be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The new standard is effective for fiscal years beginning after December 15, 2018 and should be applied retrospectively. Early adoption is permitted.

We are evaluating the impact, if any, of adopting this new accounting guidance on our financial statements. We expect there would be a significant impact to the consolidated statements of cash flows for the years ended December 31, 2015 and 2016, as those years include, as an investing activity, the $3.6 billion movement in restricted cash as a result of transferring cash into escrow at December 31, 2015 to facilitate the King Acquisition and the subsequent release of that cash in 2016 in connection with the King Acquisition. Under this new standard, the restricted cash balance would be included in the beginning and ending total cash, cash equivalents, and restricted cash balances and hence would not be included as an investing activity in the statement of cash flows.

Goodwill

In January 2017, the FASB issued new guidance which eliminates Step 2 from the goodwill impairment test. Instead, if any entity forgoes a Step 0 test, an entity will be required to perform its annual or interim goodwill impairment test by comparing the fair value of a reporting unit, as determined in Step 1 from the goodwill impairment test, with its carrying amount and recognize an impairment charge, if any, for the amount by which the carrying amount exceeds the reporting unit's fair value, not to exceed the total amount of goodwill allocated to the reporting unit. The new standard is effective for fiscal years beginning after December 15, 2019 and should be applied prospectively. Early adoption is permitted. We are evaluating the impact, if any, of adopting this new accounting guidance on our consolidated financial statements.