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Leases - Narrative (Details) $ in Millions | Dec. 31, 2024 USD ($)
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Leases [Abstract] |
Lease not yet commenced, future minimum obligation | $ 2.3

X
- Definition Lessee, Operating Lease, Not Yet Commenced, Future Minimum Obligation + References No definition available. + Details
Name: | mat_LesseeOperatingLeaseNotYetCommencedFutureMinimumObligation
Namespace Prefix: | mat_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration