Cybersecurity Risk Management and Strategy Disclosure	12 Months Ended
Cybersecurity Risk Management and Strategy Disclosure	Sep. 30, 2025
Cybersecurity Risk Management, Strategy, and Governance [Line Items]
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]	We recognize the importance of assessing, identifying, and managing risks from cybersecurity threats. We have implemented a cybersecurity risk management program in accordance with our risk profile, which is informed by, and incorporates, elements of recognized industry standards. We leverage the support of third-party information technology and security providers, including for cybersecurity audits and risk assessments. We implement technical controls, such as multi-factor authentication and we deploy cybersecurity tools through a leading third-party cybersecurity firm to protect our systems from cybersecurity related risks. We have an enterprise risk management program and we maintain written information security policies, including an incident response plan, which is designed to establish our processes for identifying, responding to, and recovering from cybersecurity incidents. The incident response plan is exercised on an annual basis. Finally, we have implemented a process to assess and review the cybersecurity practices of certain third-party vendors and service providers, including through the use of vendor security questionnaires. We have not identified any cybersecurity incidents or threats that have materially affected us or are reasonably likely to materially affect us, including our business strategy, results of operations or financial condition. However, like other companies in our industry, we and our third-party vendors may, from time to time, experience threats and security incidents that could affect our information or systems. For more information, please see Item 1A - Risk Factors.
Cybersecurity Risk Management Processes Integrated [Flag]	true
Cybersecurity Risk Management Processes Integrated [Text Block]	We recognize the importance of assessing, identifying, and managing risks from cybersecurity threats. We have implemented a cybersecurity risk management program in accordance with our risk profile, which is informed by, and incorporates, elements of recognized industry standards. We leverage the support of third-party information technology and security providers, including for cybersecurity audits and risk assessments. We implement technical controls, such as multi-factor authentication and we deploy cybersecurity tools through a leading third-party cybersecurity firm to protect our systems from cybersecurity related risks.
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]	Our cybersecurity risk management program is managed by our Information Security Management Committee. Led by our Chief Information Security Officer (“CISO”), the Information Security Management Committee is made up of cross-functional members of company management and works closely with our third-party information technology and security providers to develop and implement our cybersecurity strategy. Our CISO is responsible for the day-to-day oversight of the assessment and management of cybersecurity risks. The individual who is currently in this role has over 20 years of experience in information security. Our audit committee has oversight over cybersecurity risks. The audit committee reviews the enterprise risk management program quarterly, which includes the cybersecurity risk management program and any identified cybersecurity risks. With the input of the Information Security Management Committee and our information technology providers, the CISO regularly reports to the audit committee on our cybersecurity risk management process, including updates related to security testing, assessments, cyber risk and related cyber strategy, as applicable. In addition, the CISO makes annual cybersecurity reports to our board of directors.
Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]	Our cybersecurity risk management program is managed by our Information Security Management Committee. Led by our Chief Information Security Officer (“CISO”), the Information Security Management Committee is made up of cross-functional members of company management and works closely with our third-party information technology and security providers to develop and implement our cybersecurity strategy. Our CISO is responsible for the day-to-day oversight of the assessment and management of cybersecurity risks.
Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]	With the input of the Information Security Management Committee and our information technology providers, the CISO regularly reports to the audit committee on our cybersecurity risk management process, including updates related to security testing, assessments, cyber risk and related cyber strategy, as applicable. In addition, the CISO makes annual cybersecurity reports to our board of directors.
Cybersecurity Risk Role of Management [Text Block]	The audit committee reviews the enterprise risk management program quarterly, which includes the cybersecurity risk management program and any identified cybersecurity risks. With the input of the Information Security Management Committee and our information technology providers, the CISO regularly reports to the audit committee on our cybersecurity risk management process, including updates related to security testing, assessments, cyber risk and related cyber strategy, as applicable. In addition, the CISO makes annual cybersecurity reports to our board of directors.
Cybersecurity Risk Management Positions or Committees Responsible [Flag]	true
Cybersecurity Risk Management Positions or Committees Responsible [Text Block]	Our CISO is responsible for the day-to-day oversight of the assessment and management of cybersecurity risks. The individual who is currently in this role has over 20 years of experience in information security. Our audit committee has oversight over cybersecurity risks. The audit committee reviews the enterprise risk management program quarterly, which includes the cybersecurity risk management program and any identified cybersecurity risks.
Cybersecurity Risk Management Expertise of Management Responsible [Text Block]	The individual who is currently in this role has over 20 years of experience in information security.
Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]	With the input of the Information Security Management Committee and our information technology providers, the CISO regularly reports to the audit committee on our cybersecurity risk management process, including updates related to security testing, assessments, cyber risk and related cyber strategy, as applicable.
Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]	true

Cerence Inc. 10-K