v3.26.3
GOODWILL AND INTANGIBLE ASSETS, NET - Schedule of Change to Company's Goodwill (Details)
$ in Millions
9 Months Ended
Sep. 30, 2026
USD ($)
Goodwill [Roll Forward]  
Goodwill, beginning balance $ 2,923.4
Acquisitions 128.4
Foreign exchange translation adjustment (4.0)
Goodwill, ending balance 3,047.8
Index  
Goodwill [Roll Forward]  
Goodwill, beginning balance 1,231.1
Acquisitions 42.3
Foreign exchange translation adjustment (3.2)
Goodwill, ending balance 1,270.2
Analytics  
Goodwill [Roll Forward]  
Goodwill, beginning balance 296.9
Acquisitions 0.0
Foreign exchange translation adjustment 0.0
Goodwill, ending balance 296.9
Sustainability and Climate  
Goodwill [Roll Forward]  
Goodwill, beginning balance 86.3
Acquisitions 74.5
Foreign exchange translation adjustment (0.5)
Goodwill, ending balance 160.3
All Other - Private Assets  
Goodwill [Roll Forward]  
Goodwill, beginning balance 1,309.1
Acquisitions 11.6
Foreign exchange translation adjustment (0.3)
Goodwill, ending balance $ 1,320.4