v3.24.0.1
Cover Page - USD ($)
 12 Months Ended
Dec. 31, 2023
Feb. 23, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-40291    
Entity Registrant Name COMPASS, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 30-0751604    
Entity Address, Address Line One 110 Fifth Avenue, 4th Floor    
Entity Address, City or Town New York    
Entity Address, State or Province NY    
Entity Address, Postal Zip Code 10011    
City Area Code 212    
Local Phone Number 913-9058    
Title of 12(g) Security Class A Common Stock, $0.00001 par value per share    
Trading Symbol COMP    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
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    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 1,110,343,315
Entity Common Stock, Shares Outstanding   491,284,424  
Documents Incorporated by Reference
DOCUMENTS INCORPORATED BY REFERENCE
The portions of the registrant’s proxy statement to be filed in connection with the registrant’s 2024 Annual Meeting of Stockholders that are responsive to the disclosure required by Part III of Form 10-K are incorporated by reference into Part III of this Form 10-K.
    
Entity Central Index Key 0001563190    
Amendment Flag false    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2023