XML 14 R1.htm IDEA: XBRL DOCUMENT v3.22.0.1
Cover Page - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Feb. 22, 2022
Document Information [Line Items]    
Document Type 10-K  
Amendment Flag false  
Document Annual Report true  
Document Transition Report false  
Document Period End Date Dec. 31, 2021  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus FY  
Entity Registrant Name COMPASS, INC.  
Entity Central Index Key 0001563190  
Current Fiscal Year End Date --12-31  
Entity File Number 001-40291  
Entity Tax Identification Number 30-0751604  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Filer Category Non-accelerated Filer  
Entity Shell Company false  
Trading Symbol COMP  
Security Exchange Name NYSE  
Title of 12(g) Security Class A Common Stock, $0.00001 par value per share  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Incorporation, State or Country Code DE  
Entity Address, Address Line One 90 Fifth Avenue, 3rd 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  
Entity Well-known Seasoned Issuer No  
Entity Voluntary Filers No  
Entity Common Stock, Shares Outstanding   412,087,109
Entity Public Float $ 3,116,948,335  
ICFR Auditor Attestation Flag false  
Auditor Name PricewaterhouseCoopers LLP  
Auditor Firm ID 238  
Auditor Location New York