Seasonal Financing	3 Months Ended
Mar. 31, 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 facility is used as a back-up to Mattel’s commercial paper program, which is used as the primary source of financing for the seasonal working capital requirements of its domestic subsidiaries. The agreement governing the Credit Facility was amended and restated on June 8, 2015 to, among other things, (i) extend the maturity date of the Credit Facility to June 9, 2020, (ii) amend the definition of consolidated earnings before interest, taxes, depreciation, and amortization (“Consolidated EBITDA”) used in calculating Mattel’s financial ratio covenants, and (iii) increase the maximum allowed consolidated debt-to-Consolidated EBITDA ratio to 3.50 to 1. 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. The proportion of unamortized debt issuance costs from the prior facility renewal related to creditors involved in both the prior facility and amended facility and borrowing costs incurred as a result of the amendment were deferred, and such costs will be amortized over the term of the amended facility. Mattel is required to meet financial ratio covenants at the end of each quarter and fiscal year, using the formulae specified in the credit agreement to calculate the ratios. Mattel was in compliance with such covenants at March 31, 2017. The credit agreement 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.

Seasonal Financing

Mattel maintains and periodically amends or replaces its domestic unsecured committed revolving credit facility ("Credit Facility") with a commercial bank group. The facility is used as a back-up to Mattel’s commercial paper program, which is used as the primary source of financing for the seasonal working capital requirements of its domestic subsidiaries. The agreement governing the Credit Facility was amended and restated on June 8, 2015 to, among other things, (i) extend the maturity date of the Credit Facility to June 9, 2020, (ii) amend the definition of consolidated earnings before interest, taxes, depreciation, and amortization (“Consolidated EBITDA”) used in calculating Mattel’s financial ratio covenants, and (iii) increase the maximum allowed consolidated debt-to-Consolidated EBITDA ratio to 3.50 to 1. 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.

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

Mattel is required to meet financial ratio covenants at the end of each quarter and fiscal year, using the formulae specified in the credit agreement to calculate the ratios. Mattel was in compliance with such covenants at March 31, 2017.

The credit agreement 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.