v3.25.2
Document and Entity Information - shares
 9 Months Ended
Jun. 30, 2025
Jul. 30, 2025
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2025  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q3  
Current Fiscal Year End Date --09-30  
Document Quarterly Report true  
Document Transition Report false  
Entity File Number 001-39030  
Entity Registrant Name CERENCE INC.  
Entity Central Index Key 0001768267  
Entity Incorporation State Country Code DE  
Entity Tax Identification Number 83-4177087  
Entity Address Address Line1 25 Mall Road  
Entity Address Address Line2 Suite 416  
Entity Address City Or Town Burlington  
Entity Address State Or Province MA  
Entity Address Postal Zip Code 01803  
City Area Code 857  
Local Phone Number 362-7300  
Title of 12(b) Security Common Stock, par value $0.01 per share  
Trading Symbol CRNC  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   43,319,651