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Share-Based Payments - Narrative (Detail) | 12 Months Ended
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Dec. 31, 2021 USD ($) Age incentiveProgram $ / shares shares | Dec. 31, 2020 USD ($) $ / shares shares | Dec. 31, 2019 USD ($) $ / shares shares | Dec. 31, 2018 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation | $ 60,081,000 | $ 60,168,000 | $ 55,968,000 |
Total unrecognized compensation cost related to unvested share-based payments | $ 89,500,000 |  |  |
Weighted average period for unrecognized compensation cost expected to be recognized | 2 years 1 month 6 days |  |  |
Income tax benefits from share-based payment arrangements | $ 7,000,000 | $ 0 | $ 0 |
Weighted average grant date fair value of stock options granted (USD per share) | $ / shares | $ 9.31 | $ 4.60 | $ 5.09 |
Intrinsic value of stock options exercised | $ 3,000,000 | $ 0 | $ 0 |
Intrinsic value of stock options outstanding | $ 56,000,000 |  |  |
Weighted average remaining life of stock options outstanding | 4 years 3 months 18 days |  |  |
Intrinsic value of stock options exercisable |  | $ 36,000,000 |  |
Weighted average remaining life of stock options exercisable |  | 3 years 6 months |  |
Cash received from stock options exercised | $ 12,000,000 |  |  |
Stock options vested or expected to vest (in shares) | shares | 19,000,000 |  |  |
Intrinsic value of stock options vested or expected to vest | $ 54,200,000 |  |  |
Weighted average exercise price of stock options vested or expected to vest (USD per share) | $ / shares | $ 22.47 |  |  |
Weighted average remaining life of stock options vested or expected to vest | 4 years 2 months 12 days |  |  |
Approximate stock options vested (in shares) | shares | 3,000,000 |  |  |
Approximate total grant date fair value of stock options vested | $ 15,000,000 | $ 11,000,000 | 8,000,000 |
Weighted average grant date fair value of restricted stock units expected to vest (USD per share) | $ / shares | $ 16.88 |  |  |
Number of long-term incentive programs | incentiveProgram | 3 |  |  |
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 | $ 10,100,000 | 11,600,000 | 11,300,000 |
Market-Based Options |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award performance cycle |  |  |  | 3 years
Restricted Stock Units (RSUs) |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
General vesting period | 3 years |  |  |
Share-based compensation | $ 27,300,000 | 28,600,000 | 33,600,000 |
Stock units expected to vest (in shares) | shares | 3,000,000 |  |  |
Total grant date fair value of restricted stock units vested | $ 27,000,000 | $ 31,000,000 | $ 36,000,000 |
Weighted average grant date fair value (USD per share) | $ / shares | $ 21.77 | $ 11.18 | $ 13.28 |
Awards vested during the period (in shares) | shares | 1,954,000 | 1,970,000 | 1,997,000 |
Performance Awards |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
General vesting period | 3 years |  |  |
Stock units expected to vest (in shares) | shares | 4,000,000 |  |  |
Weighted average grant date fair value of restricted stock units expected to vest (USD per share) | $ / shares | $ 14.93 |  |  |
Total grant date fair value of restricted stock units vested | $ 14,000,000 | $ 2,000,000 |  |
Long term incentive compensation expenses | $ 22,700,000 | $ 19,900,000 | $ 11,000,000 |
Weighted average grant date fair value (USD per share) | $ / shares | $ 22.04 | $ 11.93 | $ 14.89 |
Awards vested during the period (in shares) | shares | 884,000 | 95,000 | 0 |
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% |  |  |
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% |  |  |
Amended 2010 Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares authorized | shares | 120,000,000 |  |  |
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 | shares | 32,000,000 |  |  |
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 | shares | 24,000,000 |  |  |
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 |  |  |
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 |  |  |
Amended 2010 Plan | Stock Options | Grants prior to March 1, 2019 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares issued per RSU award | 1 |  |  |
Amended 2010 Plan | Stock Options | Grants on or after March 1, 2019 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares issued per RSU award | 1 |  |  |
Amended 2010 Plan | Stock Options | Grants on or after March 2, 2020 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares issued per RSU award | 1 |  |  |
Amended 2010 Plan | Stock Options | Grants on or after March 2, 2021 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares issued per RSU award | 1 |  |  |
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 | Market-Based Options |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted average grant date fair value of stock options granted (USD per share) | $ / shares |  |  |  | $ 4.21
Amended 2010 Plan | Market-Based Options | Minimum |  |  |  |
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 | shares |  |  |  | 0
Amended 2010 Plan | Market-Based Options | Maximum |  |  |  |
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 | shares |  |  |  | 1,300,000
Amended 2010 Plan | 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 |  |  |
Amended 2010 Plan | Restricted Stock Units (RSUs) | Grants prior to March 1, 2019 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares issued per RSU award | 3 |  |  |
Amended 2010 Plan | Restricted Stock Units (RSUs) | Grants on or after March 1, 2019 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares issued per RSU award | 2.7 |  |  |
Amended 2010 Plan | Restricted Stock Units (RSUs) | Grants on or after March 2, 2020 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares issued per RSU award | 2.35 |  |  |
Amended 2010 Plan | Restricted Stock Units (RSUs) | Grants on or after March 2, 2021 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares issued per RSU award | 1.9 |  |  |
Amended 2010 Plan | Stock Appreciation Rights (SARs) | Grants prior to March 1, 2019 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares issued per RSU award | 1 |  |  |
Amended 2010 Plan | Stock Appreciation Rights (SARs) | Grants on or after March 1, 2019 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares issued per RSU award | 1 |  |  |
Amended 2010 Plan | Stock Appreciation Rights (SARs) | Grants on or after March 2, 2020 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares issued per RSU award | 1 |  |  |
Amended 2010 Plan | Stock Appreciation Rights (SARs) | Grants on or after March 2, 2021 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares issued per RSU award | 1 |  |  |
Amended 2010 Plan | Restricted Stock | Grants prior to March 1, 2019 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares issued per RSU award | 3 |  |  |
Amended 2010 Plan | Restricted Stock | Grants on or after March 1, 2019 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares issued per RSU award | 2.7 |  |  |
Amended 2010 Plan | Restricted Stock | Grants on or after March 2, 2020 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares issued per RSU award | 2.35 |  |  |
Amended 2010 Plan | Restricted Stock | Grants on or after March 2, 2021 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares issued per RSU award | 1.9 |  |  |

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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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