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Basis of Presentation | 3 Months Ended
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Mar. 31, 2018
Accounting Policies [Abstract] |
Basis of Presentation | Basis of Presentation The accompanying unaudited consolidated financial statements and related disclosures have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") applicable to interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. In the opinion of management, all adjustments, consisting of only those of a normal recurring nature, considered necessary for a fair presentation of the financial position and interim results of Mattel, Inc. and its subsidiaries ("Mattel") as of and for the periods presented have been included. As Mattel’s business is seasonal, results for interim periods are not necessarily indicative of those that may be expected for a full year. Prior period amounts have been reclassified to conform to the current year presentation, as further discussed in "Note 16 to the Consolidated Financial Statements—Employee Benefit Plans" and "Note 23 to the Consolidated Financial Statements—Segment Information." The year-end balance sheet data was derived from audited financial statements; however, the accompanying interim notes to the consolidated financial statements do not include all the annual disclosures required by GAAP. The financial information included herein should be read in conjunction with Mattel’s consolidated financial statements and related notes in its 2017 Annual Report on Form 10-K.

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- Definition The entire disclosure for the basis of accounting, or basis of presentation, used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS). + References No definition available. + Details
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