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Summary of Significant Accounting Policies (Details) | 12 Months Ended
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Dec. 31, 2024 unit option
Property, Plant and Equipment [Line Items] |
Number of options to extend, minimum | option | 1
Renewal term (up to) | 10 years
Number of reporting units | unit | 1
Mattel163 Limited |
Property, Plant and Equipment [Line Items] |
Equity interest, ownership percentage | 50.00%
Building and Building Improvements | Minimum |
Property, Plant and Equipment [Line Items] |
Estimated useful lives, years | 10 years
Building and Building Improvements | Maximum |
Property, Plant and Equipment [Line Items] |
Estimated useful lives, years | 30 years
Machinery and equipment | Minimum |
Property, Plant and Equipment [Line Items] |
Estimated useful lives, years | 3 years
Machinery and equipment | Maximum |
Property, Plant and Equipment [Line Items] |
Estimated useful lives, years | 15 years
Software | Minimum |
Property, Plant and Equipment [Line Items] |
Estimated useful lives, years | 3 years
Software | Maximum |
Property, Plant and Equipment [Line Items] |
Estimated useful lives, years | 10 years
Leasehold improvements | Minimum |
Property, Plant and Equipment [Line Items] |
Estimated useful lives, years | 10 years
Leasehold improvements | Maximum |
Property, Plant and Equipment [Line Items] |
Estimated useful lives, years | 20 years
Tools, dies, and molds |
Property, Plant and Equipment [Line Items] |
Estimated useful lives, years | 3 years

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