Seasonal Financing	9 Months Ended
Sep. 30, 2017
Debt Disclosure [Abstract]
Seasonal Financing	Seasonal Financing Mattel maintains and periodically amends or replaces its domestic unsecured committed revolving credit facility (“Credit Facility”) with a commercial bank group. The Credit Facility is used as a back-up to Mattel’s commercial paper program, which is used as Mattel's primary short-term borrowing facility. The agreement governing the Credit Facility was amended on June 15, 2017 to, among other things, increase the maximum allowed consolidated debt-to-consolidated earnings before interest, taxes, depreciation, and amortization (“consolidated EBITDA”) ratio that Mattel is required to maintain under the Credit Facility to 3.75 to 1 from 3.50 to 1 for the four consecutive quarters beginning with the second quarter of 2017. Additionally, the Credit Facility was amended on September 20, 2017 to remove the consolidated debt-to-consolidated EBITDA ratio requirement for the third fiscal quarter of 2017 and increase the consolidated debt-to-consolidated EBITDA ratio during a covenant modification period to 4.50 to 1.00 for the fourth fiscal quarter of 2017 and 4.25 to 1.00 for each fiscal quarter thereafter. The covenant modification period commenced on September 20, 2017 and continues, at a minimum, through the fourth fiscal quarter of 2017 and thereafter until such time as Mattel (i) requests the termination of the covenant modification period, and (ii) delivers financial statements and a certificate to the lenders demonstrating a consolidated debt-to-consolidated EBITDA ratio of 3.75 to 1.00 or less for the period consisting of the preceding four consecutive fiscal quarters. The amendment further amends the Credit Facility to, among other items, (i) add certain restrictive covenants during the covenant modification period that include greater restrictions against certain receivable financing facilities, as well as restrictions on certain asset dispositions, burdensome agreements, and specified restricted payments, (ii) add a guarantee and lien trigger event that occurs if Mattel’s debt rating falls below certain thresholds, (iii) add covenants that require all U.S. material subsidiaries under the Credit Facility (other than foreign subsidiary holding companies) to become guarantors upon a guarantee and lien trigger event, and (iv) provide that after a guarantee and lien trigger event and before the termination of the covenant modification period, indebtedness under the Credit Facility in an amount not to exceed 10% of Mattel’s consolidated net tangible assets will be secured by pledges from Mattel and the guarantors of 100% of the equity of all U.S. subsidiaries (other than any foreign subsidiary holding company) and 66% of the equity of all first-tier foreign subsidiaries and foreign subsidiary holdings companies. Such guarantees and pledges, as well as the additional restrictive covenants, will be eliminated upon the termination of the covenant modification period. Although the consolidated debt-to-consolidated EBITDA ratio was removed for the third quarter, Mattel is required to meet financial ratio covenants at the end of each quarter and fiscal year, using the formulae specified in the Credit Facility to calculate the ratios. Mattel was in compliance with its interest coverage ratio covenant at September 30, 2017. The aggregate commitments under the Credit Facility remain at $1.60 billion, with an “accordion feature,” which allows Mattel to increase the aggregate availability under the Credit Facility to $1.85 billion under certain circumstances. In addition, applicable interest rate margins remain within a range of 0.00% to 0.75% above the applicable base rate for base rate loans and 0.88% to 1.75% above the applicable LIBOR for Eurodollar rate loans, and the commitment fees range from 0.08% to 0.25% of the unused commitments under the Credit Facility, in each case depending on Mattel’s senior unsecured long-term debt rating. Both the borrowing costs incurred as a result of the amendment and the portion of unamortized debt issuance costs from the prior facility renewal related to creditors involved in both the prior facility and amended facility were deferred, and such costs will be amortized over the term of the amended Credit Facility. The agreement governing the Credit Facility is a material agreement, and failure to comply with the financial ratio covenants may result in an event of default under the terms of the Credit Facility. If Mattel were to default under the terms of the Credit Facility, its ability to meet its seasonal financing requirements could be adversely affected. Furthermore, Mattel’s long-term debt agreements contain cross-default provisions which would result in an event of default if Mattel, among other items, fails to comply with the financial ratio covenants under the terms of the Credit Facility with outstanding borrowings in excess of $25 million. The Credit Facility is used as a back-up to Mattel’s commercial paper program.

Seasonal Financing

Mattel maintains and periodically amends or replaces its domestic unsecured committed revolving credit facility (“Credit Facility”) with a commercial bank group. The Credit Facility is used as a back-up to Mattel’s commercial paper program, which is used as Mattel's primary short-term borrowing facility. The agreement governing the Credit Facility was amended on June 15, 2017 to, among other things, increase the maximum allowed consolidated debt-to-consolidated earnings before interest, taxes, depreciation, and amortization (“consolidated EBITDA”) ratio that Mattel is required to maintain under the Credit Facility to 3.75 to 1 from 3.50 to 1 for the four consecutive quarters beginning with the second quarter of 2017. Additionally, the Credit Facility was amended on September 20, 2017 to remove the consolidated debt-to-consolidated EBITDA ratio requirement for the third fiscal quarter of 2017 and increase the consolidated debt-to-consolidated EBITDA ratio during a covenant modification period to 4.50 to 1.00 for the fourth fiscal quarter of 2017 and 4.25 to 1.00 for each fiscal quarter thereafter. The covenant modification period commenced on September 20, 2017 and continues, at a minimum, through the fourth fiscal quarter of 2017 and thereafter until such time as Mattel (i) requests the termination of the covenant modification period, and (ii) delivers financial statements and a certificate to the lenders demonstrating a consolidated debt-to-consolidated EBITDA ratio of 3.75 to 1.00 or less for the period consisting of the preceding four consecutive fiscal quarters. The amendment further amends the Credit Facility to, among other items, (i) add certain restrictive covenants during the covenant modification period that include greater restrictions against certain receivable financing facilities, as well as restrictions on certain asset dispositions, burdensome agreements, and specified restricted payments, (ii) add a guarantee and lien trigger event that occurs if Mattel’s debt rating falls below certain thresholds, (iii) add covenants that require all U.S. material subsidiaries under the Credit Facility (other than foreign subsidiary holding companies) to become guarantors upon a guarantee and lien trigger event, and (iv) provide that after a guarantee and lien trigger event and before the termination of the covenant modification period, indebtedness under the Credit Facility in an amount not to exceed 10% of Mattel’s consolidated net tangible assets will be secured by pledges from Mattel and the guarantors of 100% of the equity of all U.S. subsidiaries (other than any foreign subsidiary holding company) and 66% of the equity of all first-tier foreign subsidiaries and foreign subsidiary holdings companies. Such guarantees and pledges, as well as the additional restrictive covenants, will be eliminated upon the termination of the covenant modification period.

Although the consolidated debt-to-consolidated EBITDA ratio was removed for the third quarter, Mattel is required to meet financial ratio covenants at the end of each quarter and fiscal year, using the formulae specified in the Credit Facility to calculate the ratios. Mattel was in compliance with its interest coverage ratio covenant at September 30, 2017.

The aggregate commitments under the Credit Facility remain at $1.60 billion, with an “accordion feature,” which allows Mattel to increase the aggregate availability under the Credit Facility to $1.85 billion under certain circumstances. In addition, applicable interest rate margins remain within a range of 0.00% to 0.75% above the applicable base rate for base rate loans and 0.88% to 1.75% above the applicable LIBOR for Eurodollar rate loans, and the commitment fees range from 0.08% to 0.25% of the unused commitments under the Credit Facility, in each case depending on Mattel’s senior unsecured long-term debt rating.

Both the borrowing costs incurred as a result of the amendment and the portion of unamortized debt issuance costs from the prior facility renewal related to creditors involved in both the prior facility and amended facility were deferred, and such costs will be amortized over the term of the amended Credit Facility.

The agreement governing the Credit Facility is a material agreement, and failure to comply with the financial ratio covenants may result in an event of default under the terms of the Credit Facility. If Mattel were to default under the terms of the Credit Facility, its ability to meet its seasonal financing requirements could be adversely affected. Furthermore, Mattel’s long-term debt agreements contain cross-default provisions which would result in an event of default if Mattel, among other items, fails to comply with the financial ratio covenants under the terms of the Credit Facility with outstanding borrowings in excess of $25 million. The Credit Facility is used as a back-up to Mattel’s commercial paper program.