Summary of Significant Accounting Policies	12 Months Ended
Dec. 31, 2016
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Principles of Consolidation and Basis of Preparation The consolidated financial statements include the accounts of Mattel, Inc. and its subsidiaries. All wholly and majority-owned subsidiaries are consolidated and included in Mattel’s consolidated financial statements. Mattel does not have any minority stock ownership interests in which it has a controlling financial interest that would require consolidation. All significant intercompany accounts and transactions have been eliminated upon consolidation. Use of Estimates Preparation of the consolidated financial statements in conformity with accounting principles generally accepted in the United States of America (“US GAAP”) requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could ultimately differ from those estimates. Cash and Equivalents Cash and equivalents include short-term investments, which are highly liquid investments with maturities of three months or less when purchased. Such investments are stated at cost, which approximates market value. Accounts Receivable and Allowance for Doubtful Accounts Credit is granted to customers on an unsecured basis. Credit limits and payment terms are established based on extensive evaluations made on an ongoing basis throughout the fiscal year of the financial performance, cash generation, financing availability, and liquidity status of each customer. Customers are reviewed at least annually, with more frequent reviews performed as necessary, based on the customers’ financial condition and the level of credit being extended. For customers who are experiencing financial difficulties, management performs additional financial analyses before shipping to those customers on credit. Mattel uses a variety of financial arrangements to ensure collectibility of accounts receivable of customers deemed to be a credit risk, including requiring letters of credit, purchasing various forms of credit insurance with unrelated third parties, factoring, or requiring cash in advance of shipment. Mattel records an allowance for doubtful accounts based on management’s assessment of the business environment, customers’ financial condition, historical collection experience, accounts receivable aging, and customer disputes. Inventories Inventories, net of an allowance for excess quantities and obsolescence, are stated at the lower of cost or market. Inventory allowances are charged to cost of sales and establish a lower cost basis for the inventory. Cost is determined by the first-in, first-out method. Property, Plant, and Equipment Property, plant, and equipment are stated at cost less accumulated depreciation. Depreciation is computed using the straight-line method over estimated useful lives of 10 to 30 years for buildings, 3 to 15 years for machinery and equipment, 3 to 10 years for software, and 10 to 20 years, not to exceed the lease term, for leasehold improvements. Tools, dies, and molds are depreciated using the straight-line method over 3 years. Estimated useful lives are periodically reviewed and, where appropriate, changes are made prospectively. The carrying value of property, plant, and equipment is reviewed when events or changes in circumstances indicate that the carrying value of an asset may not be recoverable. Any potential impairment identified is assessed by evaluating the operating performance and future undiscounted cash flows of the underlying assets. When property is sold or retired, the cost of the property and the related accumulated depreciation are removed from the consolidated balance sheet, and any resulting gain or loss is included in the results of operations. Goodwill and Intangible Assets Goodwill is allocated to various reporting units, which are at the operating segment level, for purposes of evaluating whether goodwill is impaired. Mattel’s reporting units are: (i) North America, (ii) International, and (iii) American Girl. Components of the operating segments have been aggregated into a single reporting unit as the components have similar economic characteristics. The similar economic characteristics include the nature of the products, the nature of the production processes, the customers, and the manner in which the products are distributed. Mattel tests its goodwill for impairment annually in the third quarter and whenever events or changes in circumstances indicate that the carrying value of a reporting unit may exceed its fair value. Mattel tests its nonamortizable intangible assets, including trademarks and trade names, for impairment by comparing the estimated fair values of the nonamortizable intangible assets with the carrying values. Mattel tests nonamortizable intangible assets for impairment annually in the third quarter or whenever events or changes in circumstances indicate that the carrying value may exceed its fair value. Mattel also tests its amortizable intangible assets, which are primarily comprised of trademarks and trade names, for impairment whenever events or changes in circumstances indicate that the carrying value of the asset may not be recovered. Foreign Currency Translation Exposure Mattel’s reporting currency is the US dollar. The translation of its net investments in subsidiaries with non-US dollar functional currencies subjects Mattel to the impact of currency exchange rate fluctuations in its results of operations and financial position. Assets and liabilities of subsidiaries with non-US dollar functional currencies are translated into US dollars at year-end exchange rates. Income, expense, and cash flow items are translated at weighted average exchange rates prevailing during the year. The resulting currency translation adjustments are recorded as a component of accumulated other comprehensive loss within stockholders’ equity. Mattel’s primary currency translation exposures in 2016 were related to its net investments in entities having functional currencies denominated in the British pound sterling, Mexican peso, Euro, and Brazilian real. Foreign Currency Transaction Exposure Currency exchange rate fluctuations may impact Mattel’s results of operations and cash flows. Mattel’s currency transaction exposures include gains and losses realized on unhedged inventory purchases and unhedged receivables and payables balances that are denominated in a currency other than the applicable functional currency. Gains and losses on unhedged inventory purchases and other transactions associated with operating activities are recorded in the components of operating income in the consolidated statement of operations. Gains and losses on unhedged intercompany loans and advances are recorded as a component of other non-operating expense (income), net in the consolidated statement of operations in the period in which the currency exchange rate changes. Inventory transactions denominated in the Euro, Mexican peso, British pound sterling, Canadian dollar, Australian dollar, Brazilian real, Russian ruble, and Indonesian rupiah were the primary transactions that caused foreign currency transaction exposure for Mattel in 2016. Derivative Instruments Mattel uses foreign currency forward exchange contracts as cash flow hedges primarily to hedge its purchases and sales of inventory denominated in foreign currencies. At the inception of the contracts, Mattel designates these derivatives as cash flow hedges and documents the relationship of the hedge to the underlying transaction. Hedge effectiveness is assessed at inception and throughout the life of the hedge to ensure the hedge qualifies for hedge accounting. Changes in fair value associated with hedge ineffectiveness, if any, are recorded in the results of operations. Changes in fair value of cash flow hedge derivatives are deferred and recorded as part of accumulated other comprehensive loss in stockholders’ equity until the underlying transaction affects earnings. In the event that an anticipated transaction is no longer likely to occur, Mattel recognizes the change in fair value of the derivative in its results of operations in the period the determination is made. Additionally, Mattel uses foreign currency forward exchange contracts to hedge intercompany loans and advances denominated in foreign currencies. Due to the short-term nature of the contracts involved, Mattel does not use hedge accounting for these contracts, and as such, changes in fair value are recorded in the period of change in the consolidated statements of operations. Revenue Recognition and Sales Adjustments Revenue is recognized upon shipment or upon receipt of products by the customer, depending on the terms, provided that: there are no uncertainties regarding customer acceptance; persuasive evidence of an agreement exists documenting the specific terms of the transaction; the sales price is fixed or determinable; and collectibility is reasonably assured. Management assesses the business environment, the customer’s financial condition, historical collection experience, accounts receivable aging, and customer disputes to determine whether collectibility is reasonably assured. If collectibility is not considered reasonably assured at the time of sale, Mattel does not recognize revenue until collection occurs. Value added taxes are recorded on a net basis and are excluded from revenue. Mattel routinely enters into arrangements with its customers to provide sales incentives, support customer promotions, and provide allowances for returns and defective merchandise. Such programs are based primarily on customer purchases, customer performance of specified promotional activities, and other specified factors such as sales to consumers. The costs of these programs are recorded as sales adjustments that reduce gross revenue in the period the related revenue is recognized. Advertising and Promotion Costs Costs of media advertising are expensed the first time the advertising takes place, except for direct-response advertising, which is capitalized and amortized over its expected period of future benefits. Direct-response advertising consists primarily of catalog production and mailing costs, which are generally amortized within three months from the date the catalogs are mailed. Product Recalls and Withdrawals Mattel establishes a reserve for product recalls and withdrawals on a product-specific basis when circumstances giving rise to the recall or withdrawal become known. Facts and circumstances related to the recall or withdrawal, including where the product affected by the recall or withdrawal is located (e.g., with consumers, in customers’ inventory, or in Mattel’s inventory), cost estimates for shipping and handling for returns, cost estimates for communicating the recall or withdrawal to consumers and customers, and cost estimates for parts and labor if the recalled or withdrawn product is deemed to be repairable, are considered when establishing a product recall or withdrawal reserve. These factors are updated and reevaluated each period, and the related reserves are adjusted when these factors indicate that the recall or withdrawal reserve is either not sufficient to cover or exceeds the estimated product recall or withdrawal expenses. Design and Development Costs Product design and development costs primarily include employee compensation and outside services and are charged to the results of operations as incurred. Employee Benefit Plans Mattel and certain of its subsidiaries have retirement and other postretirement benefit plans covering substantially all employees of these companies. Actuarial valuations are used in determining amounts recognized in the financial statements for certain retirement and other postretirement benefit plans (see “Note 4 to the Consolidated Financial Statements—Employee Benefit Plans”). Share-Based Payments Mattel recognizes the cost of employee share-based payment awards on a straight-line attribution basis over the requisite employee service period, net of estimated forfeitures. Determining the fair value of share-based awards at the measurement date requires judgment, including estimating the expected term that stock options will be outstanding prior to exercise, the associated volatility, and the expected dividends. Mattel estimates the fair value of options granted using the Black-Scholes valuation model. The expected life of the options used in this calculation is the period of time the options are expected to be outstanding and has been determined based on historical exercise experience. Expected stock price volatility is based on the historical volatility of Mattel’s stock for a period approximating the expected life, the expected dividend yield is based on Mattel’s most recent actual annual dividend payout, and the risk-free interest rate is based on the implied yield available on US Treasury zero-coupon issues approximating the expected life. Judgment is also required in estimating the amount of share-based awards that will be forfeited prior to vesting. Mattel determines the fair value of RSUs based on the closing market price of Mattel’s common stock on the date of grant, adjusted by the present value of the expected dividend for RSUs that are not entitled to a dividend during the vest period. In the fourth quarter of 2016, Mattel early adopted Accounting Standards Update ("ASU") 2016-09, Improvements to Employee Share-Based Payment Accounting, which simplifies several aspects of the accounting for employee share-based payment transactions for public entities. The new standard requires companies to recognize all excess tax benefits and tax deficiencies in the income statement when the awards vest or are settled. Upon adoption, Mattel recognized $4.3 million in discrete tax benefits related to share-based payment accounting, which is more fully described in "Note 3 to the Consolidated Financial Statements—Income Taxes". Mattel also elected to apply the change in presentation of excess tax benefits in the statements of cash flows on a prospective basis, and as a result, prior periods were not retroactively adjusted. Excess tax benefits (deficits) in 2016 are classified as an operating activity in the statements of cash flows. Prior to the adoption of ASU 2016-09, the tax effect of deductions in excess of compensation cost (“windfalls”) related to the exercise of nonqualified stock options and vesting of other share-based compensation awards were recorded in equity and tax deficiencies (“shortfalls”) were recorded in equity to the extent of previously recognized windfalls. Income Taxes Certain income and expense items are accounted for differently for financial reporting and income tax purposes. Deferred income tax assets and liabilities are determined based on the difference between the financial statement and tax bases of assets and liabilities, applying enacted statutory income tax rates in effect for the year in which the differences are expected to reverse. In the normal course of business, Mattel is regularly audited by federal, state, local, and foreign tax authorities. The ultimate settlement of any particular issue with the applicable taxing authority could have a material impact on Mattel’s consolidated financial statements. Venezuelan Operations Since January 1, 2010, Mattel has accounted for Venezuela as a highly inflationary economy as the three-year cumulative inflation rate for Venezuela exceeded 100%. Accordingly, Mattel’s Venezuelan subsidiary uses the US dollar as its functional currency, and monetary assets and liabilities denominated in Venezuelan bolívar fuerte (“BsF”) generate income or expense for changes in value associated with foreign currency exchange rate fluctuations against the US dollar. From January 2010 through January 2013, Mattel’s Venezuelan subsidiary used the Sistema de Transacciones con Títulos en Moneda Extranjera (“SITME”) rate, which was quoted at 5.30 BsF per US dollar as of December 31, 2012, to remeasure monetary assets and liabilities denominated in BsF. During February 2013, the Central Bank of Venezuela revised its official exchange rate to 6.30 BsF per US dollar and eliminated the SITME rate. During March 2013, the Venezuelan government introduced a complementary currency exchange system, the Sistema Complementario de Administración de Divisas 1 (“SICAD 1”). SICAD 1 was intended to function as an auction system, allowing entities in specific sectors to bid for US dollars to be used for specified import transactions. During February 2014, the Venezuelan government introduced an additional currency exchange system, the Sistema Complementario de Administración de Divisas 2 (“SICAD 2”), which was expected to provide a greater supply of US dollars from sources other than the Venezuelan government and increase participation to all sectors and companies. During February 2015, the Venezuelan government announced the launch of a new three-tiered currency exchange platform, which included a new exchange system called the Marginal Currency System (“SIMADI”). The first tier was used for food, medicine, agriculture, and other essential goods and used an official exchange rate of 6.30 BsF per US dollar. The second tier was a merger of the SICAD 1 and SICAD 2 systems, which held periodic auctions for entities in specific sectors. The third tier was the new SIMADI system, which was intended to be a market-driven exchange that allowed for legal trading of foreign currency based on supply and demand. During March 2016, the Venezuelan government further revised its currency exchange platform to a dual system. The SICAD rate merged with the official exchange rate, becoming the new Tipo de Cambio Protegido ("DIPRO") exchange rate, which was fixed at 10.00 BsF per US dollar. The existing SIMADI rate was renamed the Tipo de Cambio Complementario ("DICOM") exchange rate. The DIPRO rate is used for essential imports, such as food and medicine, whereas the DICOM rate is used for all other transactions. During the first quarter of 2016, Mattel changed its remeasurement rate from the official exchange rate to the new DICOM exchange rate. The change in the remeasurement rate resulted in an unrealized foreign currency exchange loss of approximately $26 million, which was recognized in other non-operating income (expense), net in the consolidated statement of operations in the first quarter of 2016. Mattel’s Venezuelan subsidiary represented less than 0.01% of Mattel’s consolidated net sales for the year ended December 31, 2016 and had approximately $1 million of net monetary assets denominated in BsF as of December 31, 2016. Venezuela currency matters, along with economic and political instability, continue to impact the operating results of Mattel’s Venezuelan subsidiary. If the Venezuelan bolívar fuerte significantly devalues in the future, or if the economic or political conditions significantly worsen, Mattel may consider ceasing operations of its Venezuelan subsidiary, which could result in a pre-tax charge to its consolidated statement of operations of up to $71 million. United Kingdom Operations During June 2016, the referendum by British voters to exit the European Union ("Brexit") adversely impacted global markets and resulted in a sharp decline of the British pound sterling against the US dollar. In the short-term, volatility in the British pound sterling could continue as the United Kingdom negotiates its anticipated exit from the European Union. In the longer term, any impact from Brexit on Mattel's United Kingdom operations will depend, in part, on the outcome of tariff, trade, regulatory, and other negotiations. Mattel's United Kingdom operations represented approximately 4% of Mattel's consolidated net sales for the year ended December 31, 2016. New Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (“FASB”) issued ASU 2014-09, Revenue from Contracts with Customers, which supersedes the revenue recognition requirements in Accounting Standards Codification (“ASC”) 605, Revenue Recognition, and most industry-specific guidance. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The new guidance establishes a five-step model to achieve that core principle and also requires additional disclosures about the nature, amount, timing, and uncertainty of revenue and cash flows arising from customer contracts. ASU 2014-09 was originally effective for interim and annual reporting periods beginning after December 15, 2016. In August 2015, the FASB issued ASU 2015-14, Revenue from Contracts with Customers – Deferral of the Effective Date, which defers the effective date to annual reporting periods beginning after December 15, 2017. Early application is permitted after December 15, 2016. In March 2016, the FASB issued ASU 2016-08, Principal versus Agent Considerations (Reporting Revenue Gross versus Net), which clarifies the implementation guidance on principal versus agent considerations, and ASU 2016-10, Identifying Performance Obligations and Licensing, which clarifies the identification of performance obligations and the licensing implementation guidance. In May 2016, the FASB issued ASU 2016-12, Revenue from Contracts with Customers - Narrow-Scope Improvements and Practical Expedients, which clarifies guidance on assessing collectibility, presenting sales taxes and other similar taxes collected from customers, measuring noncash consideration, and certain transition matters. Mattel is currently evaluating the impact of the adoption of ASU 2014-09, ASU 2015-14, ASU 2016-08, ASU 2016-10, and ASU 2016-12 on its operating results and financial position. In July 2015, the FASB issued ASU 2015-11, Simplifying the Measurement of Inventory, which requires an entity that uses first-in, first-out or average cost to measure its inventory at the lower of cost or net realizable value. Net realizable value is the estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. ASU 2015-11 will be effective for interim and annual reporting periods beginning after December 15, 2016. Early application is permitted. Mattel does not expect the adoption of ASU 2015-11 to have a material effect on its operating results or financial position. In February 2016, the FASB issued ASU 2016-02, Leases, which requires a lessee to recognize a lease asset and lease liability on its balance sheet for all leases with a term greater than 12 months. ASU 2016-02 will be effective for interim and annual reporting periods beginning after December 15, 2018. Early application is permitted. Mattel is currently evaluating the impact of the adoption of ASU 2016-02 on its operating results and financial position. In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows - Classification of Certain Cash Receipts and Cash Payments, which adds and clarifies guidance on the classification of certain cash receipts and payments in the statement of cash flows. ASU 2016-15 will be effective for interim and annual reporting periods beginning after December 15, 2017. Early application is permitted. Mattel is currently evaluating the impact of the adoption of ASU 2016-15 on its operating results and financial statements. In October 2016, the FASB issued ASU 2016-16, Income Taxes: Intra-Entity Transfers of Assets Other Than Inventory, which requires an entity to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. ASU 2016-16 will be effective for interim and annual reporting periods beginning after December 15, 2017. Early application is permitted. Mattel is currently evaluating the impact of the adoption of ASU 2016-16 on its operating results and financial position. In January 2017, the FASB issued ASU 2017-01, Business Combinations: Clarifying the Definition of a Business, which clarifies the definition of a business to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses and refines the definition of the term output. ASU 2017-01 will be effective for interim and annual reporting periods beginning after December 15, 2017. Early application is permitted. Mattel is currently evaluating the impact of the adoption of ASU 2017-01 on its operating results and financial position. In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other: Simplifying the Test for Goodwill Impairment, which removes Step 2 from the goodwill impairment test. ASU 2017-04 will be effective for interim and annual reporting periods beginning after December 15, 2019. Early application is permitted after January 1, 2017. Mattel is currently evaluating the impact of the adoption of ASU 2017-04 on its operating results and financial position.

Summary of Significant Accounting Policies

Principles of Consolidation and Basis of Preparation

The consolidated financial statements include the accounts of Mattel, Inc. and its subsidiaries. All wholly and majority-owned subsidiaries are consolidated and included in Mattel’s consolidated financial statements. Mattel does not have any minority stock ownership interests in which it has a controlling financial interest that would require consolidation. All significant intercompany accounts and transactions have been eliminated upon consolidation.

Use of Estimates

Preparation of the consolidated financial statements in conformity with accounting principles generally accepted in the United States of America (“US GAAP”) requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could ultimately differ from those estimates.

Cash and Equivalents

Cash and equivalents include short-term investments, which are highly liquid investments with maturities of three months or less when purchased. Such investments are stated at cost, which approximates market value.

Accounts Receivable and Allowance for Doubtful Accounts

Credit is granted to customers on an unsecured basis. Credit limits and payment terms are established based on extensive evaluations made on an ongoing basis throughout the fiscal year of the financial performance, cash generation, financing availability, and liquidity status of each customer. Customers are reviewed at least annually, with more frequent reviews performed as necessary, based on the customers’ financial condition and the level of credit being extended. For customers who are experiencing financial difficulties, management performs additional financial analyses before shipping to those customers on credit. Mattel uses a variety of financial arrangements to ensure collectibility of accounts receivable of customers deemed to be a credit risk, including requiring letters of credit, purchasing various forms of credit insurance with unrelated third parties, factoring, or requiring cash in advance of shipment.

Mattel records an allowance for doubtful accounts based on management’s assessment of the business environment, customers’ financial condition, historical collection experience, accounts receivable aging, and customer disputes.

Inventories

Inventories, net of an allowance for excess quantities and obsolescence, are stated at the lower of cost or market. Inventory allowances are charged to cost of sales and establish a lower cost basis for the inventory. Cost is determined by the first-in, first-out method.

Property, Plant, and Equipment

Property, plant, and equipment are stated at cost less accumulated depreciation. Depreciation is computed using the straight-line method over estimated useful lives of 10 to 30 years for buildings, 3 to 15 years for machinery and equipment, 3 to 10 years for software, and 10 to 20 years, not to exceed the lease term, for leasehold improvements. Tools, dies, and molds are depreciated using the straight-line method over 3 years. Estimated useful lives are periodically reviewed and, where appropriate, changes are made prospectively. The carrying value of property, plant, and equipment is reviewed when events or changes in circumstances indicate that the carrying value of an asset may not be recoverable. Any potential impairment identified is assessed by evaluating the operating performance and future undiscounted cash flows of the underlying assets. When property is sold or retired, the cost of the property and the related accumulated depreciation are removed from the consolidated balance sheet, and any resulting gain or loss is included in the results of operations.

Goodwill and Intangible Assets

Goodwill is allocated to various reporting units, which are at the operating segment level, for purposes of evaluating whether goodwill is impaired. Mattel’s reporting units are: (i) North America, (ii) International, and (iii) American Girl. Components of the operating segments have been aggregated into a single reporting unit as the components have similar economic characteristics. The similar economic characteristics include the nature of the products, the nature of the production processes, the customers, and the manner in which the products are distributed. Mattel tests its goodwill for impairment annually in the third quarter and whenever events or changes in circumstances indicate that the carrying value of a reporting unit may exceed its fair value.

Mattel tests its nonamortizable intangible assets, including trademarks and trade names, for impairment by comparing the estimated fair values of the nonamortizable intangible assets with the carrying values. Mattel tests nonamortizable intangible assets for impairment annually in the third quarter or whenever events or changes in circumstances indicate that the carrying value may exceed its fair value.

Mattel also tests its amortizable intangible assets, which are primarily comprised of trademarks and trade names, for impairment whenever events or changes in circumstances indicate that the carrying value of the asset may not be recovered.

Foreign Currency Translation Exposure

Mattel’s reporting currency is the US dollar. The translation of its net investments in subsidiaries with non-US dollar functional currencies subjects Mattel to the impact of currency exchange rate fluctuations in its results of operations and financial position. Assets and liabilities of subsidiaries with non-US dollar functional currencies are translated into US dollars at year-end exchange rates. Income, expense, and cash flow items are translated at weighted average exchange rates prevailing during the year. The resulting currency translation adjustments are recorded as a component of accumulated other comprehensive loss within stockholders’ equity. Mattel’s primary currency translation exposures in 2016 were related to its net investments in entities having functional currencies denominated in the British pound sterling, Mexican peso, Euro, and Brazilian real.

Foreign Currency Transaction Exposure

Currency exchange rate fluctuations may impact Mattel’s results of operations and cash flows. Mattel’s currency transaction exposures include gains and losses realized on unhedged inventory purchases and unhedged receivables and payables balances that are denominated in a currency other than the applicable functional currency. Gains and losses on unhedged inventory purchases and other transactions associated with operating activities are recorded in the components of operating income in the consolidated statement of operations. Gains and losses on unhedged intercompany loans and advances are recorded as a component of other non-operating expense (income), net in the consolidated statement of operations in the period in which the currency exchange rate changes. Inventory transactions denominated in the Euro, Mexican peso, British pound sterling, Canadian dollar, Australian dollar, Brazilian real, Russian ruble, and Indonesian rupiah were the primary transactions that caused foreign currency transaction exposure for Mattel in 2016.

Derivative Instruments

Mattel uses foreign currency forward exchange contracts as cash flow hedges primarily to hedge its purchases and sales of inventory denominated in foreign currencies. At the inception of the contracts, Mattel designates these derivatives as cash flow hedges and documents the relationship of the hedge to the underlying transaction. Hedge effectiveness is assessed at inception and throughout the life of the hedge to ensure the hedge qualifies for hedge accounting. Changes in fair value associated with hedge ineffectiveness, if any, are recorded in the results of operations. Changes in fair value of cash flow hedge derivatives are deferred and recorded as part of accumulated other comprehensive loss in stockholders’ equity until the underlying transaction affects earnings. In the event that an anticipated transaction is no longer likely to occur, Mattel recognizes the change in fair value of the derivative in its results of operations in the period the determination is made.

Additionally, Mattel uses foreign currency forward exchange contracts to hedge intercompany loans and advances denominated in foreign currencies. Due to the short-term nature of the contracts involved, Mattel does not use hedge accounting for these contracts, and as such, changes in fair value are recorded in the period of change in the consolidated statements of operations.

Revenue Recognition and Sales Adjustments

Revenue is recognized upon shipment or upon receipt of products by the customer, depending on the terms, provided that: there are no uncertainties regarding customer acceptance; persuasive evidence of an agreement exists documenting the specific terms of the transaction; the sales price is fixed or determinable; and collectibility is reasonably assured. Management assesses the business environment, the customer’s financial condition, historical collection experience, accounts receivable aging, and customer disputes to determine whether collectibility is reasonably assured. If collectibility is not considered reasonably assured at the time of sale, Mattel does not recognize revenue until collection occurs. Value added taxes are recorded on a net basis and are excluded from revenue. Mattel routinely enters into arrangements with its customers to provide sales incentives, support customer promotions, and provide allowances for returns and defective merchandise. Such programs are based primarily on customer purchases, customer performance of specified promotional activities, and other specified factors such as sales to consumers. The costs of these programs are recorded as sales adjustments that reduce gross revenue in the period the related revenue is recognized.

Advertising and Promotion Costs

Costs of media advertising are expensed the first time the advertising takes place, except for direct-response advertising, which is capitalized and amortized over its expected period of future benefits. Direct-response advertising consists primarily of catalog production and mailing costs, which are generally amortized within three months from the date the catalogs are mailed.

Product Recalls and Withdrawals

Mattel establishes a reserve for product recalls and withdrawals on a product-specific basis when circumstances giving rise to the recall or withdrawal become known. Facts and circumstances related to the recall or withdrawal, including where the product affected by the recall or withdrawal is located (e.g., with consumers, in customers’ inventory, or in Mattel’s inventory), cost estimates for shipping and handling for returns, cost estimates for communicating the recall or withdrawal to consumers and customers, and cost estimates for parts and labor if the recalled or withdrawn product is deemed to be repairable, are considered when establishing a product recall or withdrawal reserve. These factors are updated and reevaluated each period, and the related reserves are adjusted when these factors indicate that the recall or withdrawal reserve is either not sufficient to cover or exceeds the estimated product recall or withdrawal expenses.

Design and Development Costs

Product design and development costs primarily include employee compensation and outside services and are charged to the results of operations as incurred.

Employee Benefit Plans

Mattel and certain of its subsidiaries have retirement and other postretirement benefit plans covering substantially all employees of these companies. Actuarial valuations are used in determining amounts recognized in the financial statements for certain retirement and other postretirement benefit plans (see “Note 4 to the Consolidated Financial Statements—Employee Benefit Plans”).

Share-Based Payments

Mattel recognizes the cost of employee share-based payment awards on a straight-line attribution basis over the requisite employee service period, net of estimated forfeitures.

Determining the fair value of share-based awards at the measurement date requires judgment, including estimating the expected term that stock options will be outstanding prior to exercise, the associated volatility, and the expected dividends. Mattel estimates the fair value of options granted using the Black-Scholes valuation model. The expected life of the options used in this calculation is the period of time the options are expected to be outstanding and has been determined based on historical exercise experience. Expected stock price volatility is based on the historical volatility of Mattel’s stock for a period approximating the expected life, the expected dividend yield is based on Mattel’s most recent actual annual dividend payout, and the risk-free interest rate is based on the implied yield available on US Treasury zero-coupon issues approximating the expected life. Judgment is also required in estimating the amount of share-based awards that will be forfeited prior to vesting.

Mattel determines the fair value of RSUs based on the closing market price of Mattel’s common stock on the date of grant, adjusted by the present value of the expected dividend for RSUs that are not entitled to a dividend during the vest period.

In the fourth quarter of 2016, Mattel early adopted Accounting Standards Update ("ASU") 2016-09, Improvements to Employee Share-Based Payment Accounting, which simplifies several aspects of the accounting for employee share-based payment transactions for public entities. The new standard requires companies to recognize all excess tax benefits and tax deficiencies in the income statement when the awards vest or are settled. Upon adoption, Mattel recognized $4.3 million in discrete tax benefits related to share-based payment accounting, which is more fully described in "Note 3 to the Consolidated Financial Statements—Income Taxes". Mattel also elected to apply the change in presentation of excess tax benefits in the statements of cash flows on a prospective basis, and as a result, prior periods were not retroactively adjusted. Excess tax benefits (deficits) in 2016 are classified as an operating activity in the statements of cash flows.

Prior to the adoption of ASU 2016-09, the tax effect of deductions in excess of compensation cost (“windfalls”) related to the exercise of nonqualified stock options and vesting of other share-based compensation awards were recorded in equity and tax deficiencies (“shortfalls”) were recorded in equity to the extent of previously recognized windfalls.

Income Taxes

Certain income and expense items are accounted for differently for financial reporting and income tax purposes. Deferred income tax assets and liabilities are determined based on the difference between the financial statement and tax bases of assets and liabilities, applying enacted statutory income tax rates in effect for the year in which the differences are expected to reverse.

In the normal course of business, Mattel is regularly audited by federal, state, local, and foreign tax authorities. The ultimate settlement of any particular issue with the applicable taxing authority could have a material impact on Mattel’s consolidated financial statements.

Venezuelan Operations

Since January 1, 2010, Mattel has accounted for Venezuela as a highly inflationary economy as the three-year cumulative inflation rate for Venezuela exceeded 100%. Accordingly, Mattel’s Venezuelan subsidiary uses the US dollar as its functional currency, and monetary assets and liabilities denominated in Venezuelan bolívar fuerte (“BsF”) generate income or expense for changes in value associated with foreign currency exchange rate fluctuations against the US dollar. From January 2010 through January 2013, Mattel’s Venezuelan subsidiary used the Sistema de Transacciones con Títulos en Moneda Extranjera (“SITME”) rate, which was quoted at 5.30 BsF per US dollar as of December 31, 2012, to remeasure monetary assets and liabilities denominated in BsF. During February 2013, the Central Bank of Venezuela revised its official exchange rate to 6.30 BsF per US dollar and eliminated the SITME rate.

During March 2013, the Venezuelan government introduced a complementary currency exchange system, the Sistema Complementario de Administración de Divisas 1 (“SICAD 1”). SICAD 1 was intended to function as an auction system, allowing entities in specific sectors to bid for US dollars to be used for specified import transactions. During February 2014, the Venezuelan government introduced an additional currency exchange system, the Sistema Complementario de Administración de Divisas 2 (“SICAD 2”), which was expected to provide a greater supply of US dollars from sources other than the Venezuelan government and increase participation to all sectors and companies.

During February 2015, the Venezuelan government announced the launch of a new three-tiered currency exchange platform, which included a new exchange system called the Marginal Currency System (“SIMADI”). The first tier was used for food, medicine, agriculture, and other essential goods and used an official exchange rate of 6.30 BsF per US dollar. The second tier was a merger of the SICAD 1 and SICAD 2 systems, which held periodic auctions for entities in specific sectors. The third tier was the new SIMADI system, which was intended to be a market-driven exchange that allowed for legal trading of foreign currency based on supply and demand.

During March 2016, the Venezuelan government further revised its currency exchange platform to a dual system. The SICAD rate merged with the official exchange rate, becoming the new Tipo de Cambio Protegido ("DIPRO") exchange rate, which was fixed at 10.00 BsF per US dollar. The existing SIMADI rate was renamed the Tipo de Cambio Complementario ("DICOM") exchange rate. The DIPRO rate is used for essential imports, such as food and medicine, whereas the DICOM rate is used for all other transactions. During the first quarter of 2016, Mattel changed its remeasurement rate from the official exchange rate to the new DICOM exchange rate. The change in the remeasurement rate resulted in an unrealized foreign currency exchange loss of approximately $26 million, which was recognized in other non-operating income (expense), net in the consolidated statement of operations in the first quarter of 2016.

Mattel’s Venezuelan subsidiary represented less than 0.01% of Mattel’s consolidated net sales for the year ended December 31, 2016 and had approximately $1 million of net monetary assets denominated in BsF as of December 31, 2016. Venezuela currency matters, along with economic and political instability, continue to impact the operating results of Mattel’s Venezuelan subsidiary. If the Venezuelan bolívar fuerte significantly devalues in the future, or if the economic or political conditions significantly worsen, Mattel may consider ceasing operations of its Venezuelan subsidiary, which could result in a pre-tax charge to its consolidated statement of operations of up to $71 million.

United Kingdom Operations

During June 2016, the referendum by British voters to exit the European Union ("Brexit") adversely impacted global markets and resulted in a sharp decline of the British pound sterling against the US dollar. In the short-term, volatility in the British pound sterling could continue as the United Kingdom negotiates its anticipated exit from the European Union. In the longer term, any impact from Brexit on Mattel's United Kingdom operations will depend, in part, on the outcome of tariff, trade, regulatory, and other negotiations. Mattel's United Kingdom operations represented approximately 4% of Mattel's consolidated net sales for the year ended December 31, 2016.

New Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (“FASB”) issued ASU 2014-09, Revenue from Contracts with Customers, which supersedes the revenue recognition requirements in Accounting Standards Codification (“ASC”) 605, Revenue Recognition, and most industry-specific guidance. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The new guidance establishes a five-step model to achieve that core principle and also requires additional disclosures about the nature, amount, timing, and uncertainty of revenue and cash flows arising from customer contracts. ASU 2014-09 was originally effective for interim and annual reporting periods beginning after December 15, 2016. In August 2015, the FASB issued ASU 2015-14, Revenue from Contracts with Customers – Deferral of the Effective Date, which defers the effective date to annual reporting periods beginning after December 15, 2017. Early application is permitted after December 15, 2016. In March 2016, the FASB issued ASU 2016-08, Principal versus Agent Considerations (Reporting Revenue Gross versus Net), which clarifies the implementation guidance on principal versus agent considerations, and ASU 2016-10, Identifying Performance Obligations and Licensing, which clarifies the identification of performance obligations and the licensing implementation guidance. In May 2016, the FASB issued ASU 2016-12, Revenue from Contracts with Customers - Narrow-Scope Improvements and Practical Expedients, which clarifies guidance on assessing collectibility, presenting sales taxes and other similar taxes collected from customers, measuring noncash consideration, and certain transition matters. Mattel is currently evaluating the impact of the adoption of ASU 2014-09, ASU 2015-14, ASU 2016-08, ASU 2016-10, and ASU 2016-12 on its operating results and financial position.

In July 2015, the FASB issued ASU 2015-11, Simplifying the Measurement of Inventory, which requires an entity that uses first-in, first-out or average cost to measure its inventory at the lower of cost or net realizable value. Net realizable value is the estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. ASU 2015-11 will be effective for interim and annual reporting periods beginning after December 15, 2016. Early application is permitted. Mattel does not expect the adoption of ASU 2015-11 to have a material effect on its operating results or financial position.

In February 2016, the FASB issued ASU 2016-02, Leases, which requires a lessee to recognize a lease asset and lease liability on its balance sheet for all leases with a term greater than 12 months. ASU 2016-02 will be effective for interim and annual reporting periods beginning after December 15, 2018. Early application is permitted. Mattel is currently evaluating the impact of the adoption of ASU 2016-02 on its operating results and financial position.

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows - Classification of Certain Cash Receipts and Cash Payments, which adds and clarifies guidance on the classification of certain cash receipts and payments in the statement of cash flows. ASU 2016-15 will be effective for interim and annual reporting periods beginning after December 15, 2017. Early application is permitted. Mattel is currently evaluating the impact of the adoption of ASU 2016-15 on its operating results and financial statements.

In October 2016, the FASB issued ASU 2016-16, Income Taxes: Intra-Entity Transfers of Assets Other Than Inventory, which requires an entity to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. ASU 2016-16 will be effective for interim and annual reporting periods beginning after December 15, 2017. Early application is permitted. Mattel is currently evaluating the impact of the adoption of ASU 2016-16 on its operating results and financial position.

In January 2017, the FASB issued ASU 2017-01, Business Combinations: Clarifying the Definition of a Business, which clarifies the definition of a business to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses and refines the definition of the term output. ASU 2017-01 will be effective for interim and annual reporting periods beginning after December 15, 2017. Early application is permitted. Mattel is currently evaluating the impact of the adoption of ASU 2017-01 on its operating results and financial position.

In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other: Simplifying the Test for Goodwill Impairment, which removes Step 2 from the goodwill impairment test. ASU 2017-04 will be effective for interim and annual reporting periods beginning after December 15, 2019. Early application is permitted after January 1, 2017. Mattel is currently evaluating the impact of the adoption of ASU 2017-04 on its operating results and financial position.