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Share-Based Payments - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2017 USD ($) Age $ / shares shares | Dec. 31, 2016 USD ($) $ / shares | Dec. 31, 2015 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares, plus other considerations, used to determine the maximum number of shares of common stock available for grant under the Mattel, Inc. 2010 Equity and Long-Term Compensation Plan | shares | 77,000,000 |  |
Remaining number of shares of common stock available for grant under the Mattel, Inc. 2010 Equity and Long-Term Compensation Plan | shares | 9,000,000 |  |
Share-based compensation | $ 67,119,000 | $ 53,950,000 | $ 56,691,000
Total unrecognized compensation cost related to unvested share-based payments | $ 105,500,000 |  |
Weighted average period for unrecognized compensation cost expected to be recognized (in years) | 2 years 1 month 5 days |  |
Weighted average grant date fair value of stock options granted (USD per share) | $ / shares | $ 3.37 | $ 4.09 | $ 1.97
Intrinsic value of stock options exercised | $ 500,000 | $ 15,800,000 | $ 4,900,000
Intrinsic value of stock options outstanding | $ 0 |  |
Weighted average remaining life of stock options outstanding (in years) | 7 years 4 months 16 days |  |
Intrinsic value of stock options exercisable | $ 0 |  |
Weighted average remaining life of stock options exercisable (in years) | 6 years 2 months 20 days |  |
Stock options vested or expected to vest (in shares) | shares | 24,800,000 |  |
Intrinsic value of stock options vested or expected to vest | $ 0 |  |
Weighted average exercise price of stock options vested or expected to vest (USD per share) | $ / shares | $ 26.62 |  |
Weighted average remaining life of stock options vested or expected to vest (in years) | 7 years 5 months 5 days |  |
Approximate stock options vested (in shares) | shares | 5,000,000 |  |
Approximate total grant date fair value of stock options vested | $ 14,000,000 | 13,000,000 | 12,000,000
Cash received for stock option exercises | $ 1,775,000 | 34,065,000 | 14,995,000
Restricted stock units expected to vest (in shares) | shares | 4,600,000 |  |
Weighted average grant date fair value of restricted stock units expected to vest (USD per share) | $ / shares | $ 20.80 |  |
Total grant date fair value of restricted stock units vested | $ 57,000,000 | 53,100,000 | 43,200,000
Restricted Stock Unit Compensation Expense, Excluding Performance Restricted Stock Unit Compensation Expense |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based compensation | 55,200,000 | 40,200,000 | 41,500,000
Income tax benefits from share-based payment arrangements | $ (4,200,000) | 11,500,000 | 11,000,000
Restricted Stock Units (RSUs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
General vesting period | 3 years |  |
Age requirement for accelerated vesting | Age | 55 |  |
Service period requirement for accelerated vesting | 5 years |  |
Accelerated vesting period for individuals who meet the age and service requirements | 6 months |  |
Number of shares issued per RSU award (in shares) | shares | 3 |  |
Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares issued per RSU award (in shares) | shares | 1 |  |
Share-based compensation | $ 14,100,000 | 10,500,000 | 15,200,000
Income tax benefits from share-based payment arrangements |  | 6,800,000 | 5,500,000
Stock Appreciation Rights (SARs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares issued per RSU award (in shares) | shares | 1 |  |
Restricted Stock |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares issued per RSU award (in shares) | shares | 3 |  |
Nonqualified Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Minimum grant date fair value of nonqualified stock options as a percentage of the fair value of Mattel's common stock | 100.00% |  |
General vesting period | 3 years |  |
Age requirement for accelerated vesting | Age | 55 |  |
Service period requirement for accelerated vesting | 5 years |  |
Accelerated vesting period for individuals who meet the age and service requirements | 6 months |  |
Nonqualified Stock Options | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock option expire from date of grant, period (no later than) | 10 years |  |
January 1, 2017 to December 31, 2019 LTIP | Performance Restricted Stock Unit Compensation Expense |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Income tax benefits from share-based payment arrangements | $ 0 |  |
January 1, 2016 to December 31, 2018 LTIP | Performance Restricted Stock Unit Compensation Expense |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Income tax benefits from share-based payment arrangements | 0 | 1,200,000 |
January 1, 2014 to December 31, 2016 LTIP | Performance Restricted Stock Unit Compensation Expense |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based compensation | 0 | 0 | 0
Income tax benefits from share-based payment arrangements | $ 0 | $ 0 | $ 0

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- Definition Number of shares, plus the number of shares that remained available for issuance under the 2005 Equity Compensation Plan on May 12, 2010, and any shares subject to awards outstanding under the 2005 Equity Compensation Plan that on or after May 12, 2010 are forfeited, used to determine the maximum number of shares of common stock available for grant under the Mattel, Inc. 2010 Equity and Long-Term Compensation Plan. + References No definition available. + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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