Income Taxes	9 Months Ended
Sep. 30, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Mattel’s provision for income taxes was $26.6 million and $38.8 million for the nine months ended September 30, 2016 and 2015, respectively. During the three and nine months ended September 30, 2016, Mattel recognized net discrete tax benefits of $9.0 million and $12.8 million, respectively, primarily related to reassessments of prior years’ tax liabilities based on the status of audits and tax filings in various jurisdictions around the world, settlements, and enacted tax law changes. During the three and nine months ended September 30, 2015, Mattel recognized net discrete tax expense of $0.8 million and net discrete tax benefits of $2.8 million, respectively, primarily related to reassessments of prior years' tax liabilities based on the status of audits and tax filings in various jurisdictions around the world, settlements, and enacted tax law changes. In the normal course of business, Mattel is regularly audited by federal, state, and foreign tax authorities. During the third quarter of 2016, the statute of limitations for Mattel’s 2012 federal income tax return expired. Based on the current status of federal, state, and foreign audits, Mattel believes it is reasonably possible that in the next twelve months, the total unrecognized tax benefits could decrease by approximately $11.5 million related to the settlement of tax audits and/or the expiration of statutes of limitations. The ultimate settlement of any particular issue with the applicable taxing authority could have a material impact on Mattel’s consolidated financial statements. During the first quarter of 2016, Mattel retrospectively adopted ASU 2015-17, Balance Sheet Classification of Deferred Taxes. As of September 30, 2015, prepaid expenses and other current assets decreased by $203.5 million, other noncurrent assets increased by $199.6 million, accounts payable and accrued liabilities decreased by $0.1 million, and other noncurrent liabilities decreased by $3.8 million from the previously reported amounts. As of December 31, 2015, prepaid expenses and other current assets decreased by $195.8 million, other noncurrent assets increased by $193.6 million, and other noncurrent liabilities decreased by $2.2 million from the previously reported amounts.

Income Taxes

Mattel’s provision for income taxes was $26.6 million and $38.8 million for the nine months ended September 30, 2016 and 2015, respectively. During the three and nine months ended September 30, 2016, Mattel recognized net discrete tax benefits of $9.0 million and $12.8 million, respectively, primarily related to reassessments of prior years’ tax liabilities based on the status of audits and tax filings in various jurisdictions around the world, settlements, and enacted tax law changes. During the three and nine months ended September 30, 2015, Mattel recognized net discrete tax expense of $0.8 million and net discrete tax benefits of $2.8 million, respectively, primarily related to reassessments of prior years' tax liabilities based on the status of audits and tax filings in various jurisdictions around the world, settlements, and enacted tax law changes.

In the normal course of business, Mattel is regularly audited by federal, state, and foreign tax authorities. During the third quarter of 2016, the statute of limitations for Mattel’s 2012 federal income tax return expired. Based on the current status of federal, state, and foreign audits, Mattel believes it is reasonably possible that in the next twelve months, the total unrecognized tax benefits could decrease by approximately $11.5 million related to the settlement of tax audits and/or the expiration of statutes of limitations. The ultimate settlement of any particular issue with the applicable taxing authority could have a material impact on Mattel’s consolidated financial statements.

During the first quarter of 2016, Mattel retrospectively adopted ASU 2015-17, Balance Sheet Classification of Deferred Taxes. As of September 30, 2015, prepaid expenses and other current assets decreased by $203.5 million, other noncurrent assets increased by $199.6 million, accounts payable and accrued liabilities decreased by $0.1 million, and other noncurrent liabilities decreased by $3.8 million from the previously reported amounts. As of December 31, 2015, prepaid expenses and other current assets decreased by $195.8 million, other noncurrent assets increased by $193.6 million, and other noncurrent liabilities decreased by $2.2 million from the previously reported amounts.