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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2025
Feb. 23, 2026
Jun. 30, 2025
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2025    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Trading Symbol CARS    
Entity Registrant Name Cars.com Inc.    
Entity Central Index Key 0001683606    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Current Reporting Status Yes    
Entity Shell Company false    
Entity Public Float     $ 725,620,471
Entity Common Stock, Shares Outstanding   58,636,763  
Entity File Number 001-37869    
Entity Tax Identification Number 81-3693660    
Entity Address, Address Line One 300 S. Riverside Plaza    
Entity Address, Address Line Two Suite 1000    
Entity Address, City or Town Chicago    
Entity Address, State or Province IL    
Entity Address, Postal Zip Code 60606    
City Area Code 312    
Local Phone Number 601-5000    
Entity Interactive Data Current Yes    
ICFR Auditor Attestation Flag true    
Title of 12(b) Security Common Stock, Par Value $0.01 Per Share    
Security Exchange Name NYSE    
Entity Incorporation, State or Country Code DE    
Document Annual Report true    
Document Transition Report false    
Documents Incorporated by Reference

Portions of the Registrant’s Definitive Proxy Statement relating to the Annual Meeting of Stockholders, scheduled to be held on or about June 3, 2026, are incorporated by reference into Part III of this Report.

   
Auditor Name Ernst & Young LLP    
Auditor Location Chicago, Illinois    
Auditor Firm ID 42    
Auditor Opinion [Text Block]

Opinion on the Financial Statements

 

We have audited the accompanying Consolidated Balance Sheets of Cars.com Inc. (the Company) as of December 31, 2025 and 2024, the related Consolidated Statements of Income, Comprehensive Income, Stockholders’ Equity and Cash Flows for each of the three years in the period ended December 31, 2025, and the related notes (collectively referred to as the “Consolidated Financial Statements”). In our opinion, the Consolidated Financial Statements present fairly, in all material respects, the financial position of the Company at December 31, 2025 and 2024, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2025, in conformity with U.S. generally accepted accounting principles.

 

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company’s internal control over financial reporting as of December 31, 2025, based on criteria established in Internal Control – Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework), and our report dated February 26, 2026 expressed an unqualified opinion thereon.

   
Document Financial Statement Error Correction [Flag] false