v3.25.2
ACQUISITIONS - Purchase Consideration (Details) - Matterport - USD ($)
shares in Millions, $ in Millions
6 Months Ended
Feb. 28, 2025
Jun. 30, 2025
Business Combination [Line Items]    
Cash   $ 902.1
CoStar Group Shares (11.7 million shares)   $ 881.2
Equity interest issued for acquisition (in shares)   11.7
Fair value of rollover awards $ 272.6 $ 143.8
Total   $ 1,927.1