Income Taxes	6 Months Ended
Income Taxes	Jun. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Mattel's provision for income taxes was $12.8 million and $24.7 million for the three and six months ended June 30, 2020, respectively, and $12.2 million and $14.9 million for the three and six months ended June 30, 2019, respectively. During the three and six months ended June 30, 2020, Mattel recognized a net discrete tax expense of $3.2 million and $9.6 million, respectively, primarily related to an expense for reassessments of prior years' tax liabilities and income taxes recorded on a discrete basis in various jurisdictions. During the three and six months ended June 30, 2019, Mattel recognized a net discrete tax expense of $0.8 million and discrete tax benefit of $1.1 million, respectively, primarily related to reassessments of prior years' tax liabilities and income taxes recorded on a discrete basis in various jurisdictions. As a result of the establishment of a valuation allowance on U.S. deferred tax assets, there was no U.S. tax benefit provided for U.S. losses during the three and six months ended June 30, 2020 and 2019. In the normal course of business, Mattel is regularly audited by federal, state, and foreign tax authorities. 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 $7 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. In April 2020, Mattel became aware of withholding tax regimes in Europe and potential changes in the interpretation of withholding tax rules which may subject Mattel to withholding tax for years remaining open under the applicable statute of limitation. During the second quarter of 2020, Mattel performed and completed an analysis of the application of these withholding tax regimes, which did not result in a material impact to its income tax expense.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.