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Employee Benefit Plans - Narrative (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2017
Employee Benefits Disclosure [Line Items] |  |  |  |
Accumulated benefit obligation of defined benefit pension plans | $ 437,800,000 | $ 595,400,000 |  |
Discount rate | 4.90% | 2.50% |  |
Total estimated cash contributions to be made during the next fiscal year for defined benefit pension and postretirement benefit plans | $ 6,000,000 |  |  |
Percentage of domestic defined benefit pension plan assets to total defined benefit pension plan assets | 79.00% |  |  |
Percentage of total membership in pension plan insured |  |  |  | 40.00%
Percentage limitation of an employee's total account balance that may be allocated to the Mattel Stock Fund in the Mattel, Inc. Personal Investment Plan | 25.00% |  |  |
Liability for deferred compensation and excess benefit plans | $ 49,700,000 | $ 62,800,000 |  |
Cash surrender value of life insurance policies | 79,600,000 | 88,600,000 |  |
Expense for incentive compensation plans | $ 0 | $ 137,100,000 | $ 122,500,000 |
Defined benefit pension plans |  |  |  |
Employee Benefits Disclosure [Line Items] |  |  |  |
Discount rate | 4.90% | 2.50% |  |
Long-term rate of return on plan assets used to determine net periodic benefit cost for domestic defined benefit pension plans | 5.00% | 5.00% | 5.50% |
U.S. equity securities |  |  |  |
Employee Benefits Disclosure [Line Items] |  |  |  |
Target allocation for domestic defined benefit pension plan assets | 42.00% |  |  |
Non U.S. Equity Securities |  |  |  |
Employee Benefits Disclosure [Line Items] |  |  |  |
Target allocation for domestic defined benefit pension plan assets | 28.00% |  |  |
Long-Term Bond Securities |  |  |  |
Employee Benefits Disclosure [Line Items] |  |  |  |
Target allocation for domestic defined benefit pension plan assets | 20.00% |  |  |
US Treasury Securities |  |  |  |
Employee Benefits Disclosure [Line Items] |  |  |  |
Target allocation for domestic defined benefit pension plan assets | 10.00% |  |  |

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