v3.25.2
Net Income (Loss) Per Share Attributable to Compass, Inc. - Schedule of Computation of Basic and Diluted Net Income (Loss) Per Share (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Numerator:        
Net income (loss) attributable to Compass, Inc. $ 39.4 $ 20.7 $ (11.3) $ (112.2)
Denominator:        
Weighted-average shares used in computing net income (loss) per share attributable to Compass, Inc., basic (in shares) 560,307,749 498,664,877 555,255,128 494,332,571
Net income (loss) per share attributable to Compass, Inc., basic (in dollars per share) $ 0.07 $ 0.04 $ (0.02) $ (0.23)
Numerator:        
Net income (loss) attributable to Compass, Inc. $ 39.4 $ 20.7 $ (11.3) $ (112.2)
Denominator:        
Number of shares used in basic calculation (in shares) 560,307,749 498,664,877 555,255,128 494,332,571
Incremental common stock to be issued in connection with the Share Consideration (in shares) 13,107,194 0 0 0
Weighted-average number of shares outstanding used to compute net income (loss) per share attributable to Compass, Inc., diluted (in shares) 591,370,687 509,884,022 555,255,128 494,332,571
Net income (loss) per share attributable to Compass, Inc., diluted (in dollars per share) $ 0.07 $ 0.04 $ (0.02) $ (0.23)
Christie's International Real Estate        
Denominator:        
Weighted-average shares used in computing net income (loss) per share attributable to Compass, Inc., basic (in shares) 38,500,000   38,500,000  
Denominator:        
Number of shares used in basic calculation (in shares) 38,500,000   38,500,000  
Stock options        
Denominator:        
Weighted-average effect of diluted securities (in shares) 5,806,554 3,986,751 0 0
RSUs        
Denominator:        
Weighted-average effect of diluted securities (in shares) 12,077,480 7,099,385 0 0
Employee Stock Purchase Plan        
Denominator:        
Weighted-average effect of diluted securities (in shares) 16,016 619 0 0
Unvested common stock        
Denominator:        
Weighted-average effect of diluted securities (in shares) 55,694 132,390 0 0