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Cybersecurity Risk Management and Strategy Disclosure | 12 Months Ended
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Dec. 31, 2025
Cybersecurity Risk Management, Strategy, and Governance [Line Items] |
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block] | Risk Management and Strategy Mattel has processes in place for assessing, identifying, and managing material risks from cybersecurity threats, which include developing, implementing, and maintaining cybersecurity measures and controls. Mattel considers the following factors, among others, to assess whether adequate protections are in place to address risks from known and anticipated cybersecurity threats: likelihood and severity of risk; impact on Mattel and others, including retail customers, suppliers, consumers, or employees, if a risk materializes; feasibility and cost of controls; and impact of controls on operations. As part of its cybersecurity risk management program, Mattel utilizes cybersecurity assessors, consultants, auditors, and other third-parties to assist its internal team with network security, cloud security, endpoint security, identity and access management, data loss prevention, and security information and event management. In addition, Mattel utilizes a variety of third-party technology, information systems, and service providers to help identify, isolate, and mitigate security incidents. Mattel seeks to identify vulnerabilities and mitigate risks from cybersecurity threats posed by its use of third-party technology, information systems, and service providers through oversight by Mattel's information technology ("IT") organization through a variety of processes, including conducting onboarding due diligence, imposing contractual obligations related to privacy and information security, and regularly monitoring the performance of third parties providing critical support systems. To support incident response preparedness, Mattel has developed a cybersecurity incident response plan and conducts an annual simulated incident exercise. The cybersecurity incident response plan addresses cybersecurity incidents that directly impact Mattel or arise from Mattel's use of third-party technology, information systems, and service providers. Mattel also utilizes business continuity and disaster recovery plans to prepare for potential disruptions in technology that Mattel relies upon. Further, Mattel monitors novel and advanced cybersecurity threats and provides ongoing employee security awareness training. As part of Mattel's overall risk management program, Mattel's IT organization has a governance, risk, and compliance group that provides oversight regarding IT-related risks, including cybersecurity risks, and monitors Mattel's IT control environment. This group also works with Mattel's Internal Audit team to assess Mattel's cybersecurity processes. In addition, Mattel's IT organization has a steering committee comprised of internal cybersecurity experts that are responsible for the development and maintenance of Mattel's information security programs and regularly reports to Mattel's Chief Technology Officer ("CTO"). Mattel's Head of Cybersecurity leads the steering committee with respect to cybersecurity risk management matters and works closely with designated privacy leadership to protect personal information. Mattel is subject to cybersecurity threats that could have a material adverse impact on its results of operations, financial condition, and liquidity, as further discussed in Item 1A "Risk Factors" under the heading of Legal and Regulatory. Mattel is not aware of having experienced any cybersecurity threats or incidents to date that have materially affected or are reasonably likely to materially affect Mattel, its business strategy, results of operation or financial condition. However, there can be no assurance that Mattel will be able to mitigate negative impacts in the event of future attacks or other cyber incidents.
Cybersecurity Risk Management Processes Integrated [Flag] | true
Cybersecurity Risk Management Processes Integrated [Text Block] | Mattel has processes in place for assessing, identifying, and managing material risks from cybersecurity threats, which include developing, implementing, and maintaining cybersecurity measures and controls. Mattel considers the following factors, among others, to assess whether adequate protections are in place to address risks from known and anticipated cybersecurity threats: likelihood and severity of risk; impact on Mattel and others, including retail customers, suppliers, consumers, or employees, if a risk materializes; feasibility and cost of controls; and impact of controls on operations.
Cybersecurity Risk Management Third Party Engaged [Flag] | true
Cybersecurity Risk Third Party Oversight and Identification Processes [Flag] | true
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag] | false
Cybersecurity Risk Board of Directors Oversight [Text Block] | Governance Mattel's Head of Cybersecurity and the other members of the Cybersecurity Leadership Team have collectively more than thirty years of cybersecurity industry experience at Mattel and elsewhere and are responsible for coordinating cybersecurity efforts within Mattel, with a focus on cybersecurity threat prevention, detection, and mitigation, as well as enhancement of security measures, including security updates, security architecture and engineering, and identity access management. Mattel's Head of Cybersecurity reports to the CTO, regularly communicating risks and other relevant information related to cybersecurity threats and incidents. Mattel's CTO has significant leadership, cybersecurity, and technology experience, is responsible for overseeing the monitoring and mitigation of cybersecurity threats, and advises and consults Mattel's senior management regarding material cybersecurity risks. A team led by the Head of Cybersecurity and supported by the Cybersecurity Leadership Team implements and maintains systems designed to detect and prevent cybersecurity threats, monitors important developments that may present risk to Mattel and third-party systems, and oversees the results of internal and third-party security reviews. The Head of Cybersecurity provides regular updates to Mattel's CTO regarding critical and major severity security incidents involving Mattel systems, security incidents involving third parties that have the potential to impact Mattel's operations or involve sensitive customer, supplier, consumer, or employee data, and mitigation and remediation implemented to address such threats or incidents. The Audit Committee of the Board of Directors (the "Audit Committee") oversees Mattel's assessment and management of material cybersecurity risks. The CTO reports to the Audit Committee on Mattel's cybersecurity, including material cybersecurity risks and mitigation, at least annually. The CTO reports and escalates cybersecurity incidents to management and the Audit Committee as appropriate.
Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block] | Mattel's Head of Cybersecurity reports to the CTO, regularly communicating risks and other relevant information related to cybersecurity threats and incidents.
Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block] | Mattel's Head of Cybersecurity reports to the CTO, regularly communicating risks and other relevant information related to cybersecurity threats and incidents. Mattel's CTO has significant leadership, cybersecurity, and technology experience, is responsible for overseeing the monitoring and mitigation of cybersecurity threats, and advises and consults Mattel's senior management regarding material cybersecurity risks.
Cybersecurity Risk Role of Management [Text Block] | A team led by the Head of Cybersecurity and supported by the Cybersecurity Leadership Team implements and maintains systems designed to detect and prevent cybersecurity threats, monitors important developments that may present risk to Mattel and third-party systems, and oversees the results of internal and third-party security reviews.
Cybersecurity Risk Management Positions or Committees Responsible [Flag] | true
Cybersecurity Risk Management Positions or Committees Responsible [Text Block] | As part of Mattel's overall risk management program, Mattel's IT organization has a governance, risk, and compliance group that provides oversight regarding IT-related risks, including cybersecurity risks, and monitors Mattel's IT control environment. This group also works with Mattel's Internal Audit team to assess Mattel's cybersecurity processes. In addition, Mattel's IT organization has a steering committee comprised of internal cybersecurity experts that are responsible for the development and maintenance of Mattel's information security programs and regularly reports to Mattel's Chief Technology Officer ("CTO"). Mattel's Head of Cybersecurity leads the steering committee with respect to cybersecurity risk management matters and works closely with designated privacy leadership to protect personal information. Mattel is subject to cybersecurity threats that could have a material adverse impact on its results of operations, financial condition, and liquidity, as further discussed in Item 1A "Risk Factors" under the heading of Legal and Regulatory. Mattel is not aware of having experienced any cybersecurity threats or incidents to date that have materially affected or are reasonably likely to materially affect Mattel, its business strategy, results of operation or financial condition. However, there can be no assurance that Mattel will be able to mitigate negative impacts in the event of future attacks or other cyber incidents.
Cybersecurity Risk Management Expertise of Management Responsible [Text Block] | Mattel's Head of Cybersecurity and the other members of the Cybersecurity Leadership Team have collectively more than thirty years of cybersecurity industry experience at Mattel and elsewhere and are responsible for coordinating cybersecurity efforts within Mattel, with a focus on cybersecurity threat prevention, detection, and mitigation, as well as enhancement of security measures, including security updates, security architecture and engineering, and identity access management.
Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block] | The Audit Committee of the Board of Directors (the "Audit Committee") oversees Mattel's assessment and management of material cybersecurity risks. The CTO reports to the Audit Committee on Mattel's cybersecurity, including material cybersecurity risks and mitigation, at least annually. The CTO reports and escalates cybersecurity incidents to management and the Audit Committee as appropriate.
Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag] | true

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