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Share-Based Payments - Narrative (Details) $ / shares in Units, $ in Thousands, shares in Millions | 12 Months Ended
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Dec. 31, 2023 USD ($) incentiveProgram $ / shares shares | Dec. 31, 2022 USD ($) $ / shares | Dec. 31, 2021 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based compensation | $ 83,334 | $ 69,072 | $ 60,081
Income tax benefits from share-based payment arrangements | 10,000 | $ 9,000 | $ 7,000
Total unrecognized compensation cost related to unvested share-based payments | $ 102,800 |  |
Weighted average period for unrecognized compensation cost expected to be recognized | 1 year 10 months 24 days |  |
Weighted average grant date fair value of stock options granted (USD per share) | $ / shares | $ 8.91 | $ 11.18 | $ 9.31
Intrinsic value of stock options exercised | $ 9,000 | $ 8,000 | $ 3,000
Intrinsic value of stock options outstanding | $ 26,000 |  |
Weighted average remaining life of stock options outstanding | 4 years 4 months 24 days |  |
Intrinsic value of stock options exercisable | $ 25,000 |  |
Weighted average remaining life of stock options exercisable | 3 years 10 months 24 days |  |
Cash received from stock options exercised | $ 26,742 | 27,750 | 12,131
Stock options vested or expected to vest (in shares) | shares | 12 |  |
Intrinsic value of stock options vested or expected to vest | $ 26,000 |  |
Weighted average exercise price of stock options vested or expected to vest (USD per share) | $ / shares | $ 20.31 |  |
Weighted average remaining life of stock options vested or expected to vest | 4 years 4 months 24 days |  |
Approximate stock options vested (in shares) | shares | 1 |  |
Approximate total grant date fair value of stock options vested | $ 9,000 | 9,000 | 15,000
Weighted average grant date fair value of restricted stock units expected to vest (USD per share) | $ / shares | $ 20.10 |  |
Number of long-term incentive programs | incentiveProgram | 4 |  |
Long-term incentive program, performance target duration | 3 years |  |
Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based compensation | $ 6,700 | 13,200 | 10,100
Restricted Stock Units (RSUs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
General vesting period | 3 years |  |
Share-based compensation | $ 48,500 | 37,700 | 27,300
Stock units expected to vest (in shares) | shares | 5 |  |
Total grant date fair value of restricted stock units vested | $ 42,000 | $ 29,000 | $ 27,000
Weighted average grant date fair value (USD per share) | $ / shares | $ 18.24 | $ 23.20 | $ 21.77
Performance Awards |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based compensation | $ 28,100 | $ 18,200 | $ 22,700
Stock units expected to vest (in shares) | shares | 2 |  |
Weighted average grant date fair value of restricted stock units expected to vest (USD per share) | $ / shares | $ 21.65 |  |
Total grant date fair value of restricted stock units vested | $ 26,000 | $ 27,000 | $ 14,000
Weighted average grant date fair value (USD per share) | $ / shares | $ 19.44 | $ 28.39 | $ 22.91
Performance Awards | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Long-term incentive program, percentage of shares that may ultimately be earned | 200.00% |  |
Performance Awards | Minimum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Long-term incentive program, percentage of shares that may ultimately be earned | 0.00% |  |
Amended 2010 Plan | Prior To April 28, 2023 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Age requirement for accelerated vesting | 55 |  |
Service period requirement for accelerated vesting | 5 years |  |
Amended 2010 Plan | On Or After April 28, 2023 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Age requirement for accelerated vesting | 55 |  |
Service period requirement for accelerated vesting | 10 years |  |
Amended 2010 Plan | Target Performance Goals |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Remaining number of shares of common stock available for grant under the Mattel, Inc. 2010 Equity and Long-Term Compensation Plan (in shares) | shares | 32 |  |
Amended 2010 Plan | Maximum Achievement Goals |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Remaining number of shares of common stock available for grant under the Mattel, Inc. 2010 Equity and Long-Term Compensation Plan (in shares) | shares | 30 |  |
Amended 2010 Plan | 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 |  |
Accelerated vesting period for individuals who meet the age and service requirements | 6 months |  |
Exercise period after termination | 90 days |  |
Amended 2010 Plan | 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 |  |
Amended 2010 Plan | Restricted Stock Units (RSUs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
General vesting period | 3 years |  |
Accelerated vesting period for individuals who meet the age and service requirements | 6 months |  |
Amended 2010 Plan | Performance Awards |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Accelerated vesting period for individuals who meet the age and service requirements | 6 months |  |

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