Quarterly report [Sections 13 or 15(d)]

GOODWILL AND INTANGIBLE ASSETS - Schedule of Purchased Intangible Assets (Details)

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GOODWILL AND INTANGIBLE ASSETS - Schedule of Purchased Intangible Assets (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Intangible Asset, Acquired, Finite-Lived [Line Items]    
Gross $ 3,067.0 $ 3,048.8
Accumulated Amortization (1,783.8) (1,717.5)
Net 1,283.2 1,331.3
Purchased data files    
Intangible Asset, Acquired, Finite-Lived [Line Items]    
Gross 1,153.0 1,141.2
Accumulated Amortization (795.4) (767.6)
Net 357.6 373.6
Customer relationships    
Intangible Asset, Acquired, Finite-Lived [Line Items]    
Gross 929.0 922.1
Accumulated Amortization (539.5) (523.2)
Net 389.5 398.9
Proprietary database    
Intangible Asset, Acquired, Finite-Lived [Line Items]    
Gross 718.7 720.2
Accumulated Amortization (286.1) (272.6)
Net 432.6 447.6
Acquired software and technology    
Intangible Asset, Acquired, Finite-Lived [Line Items]    
Gross 216.0 215.9
Accumulated Amortization (148.2) (139.4)
Net 67.8 76.5
Trade names, non-compete agreements and other intangible assets    
Intangible Asset, Acquired, Finite-Lived [Line Items]    
Gross 50.3 49.4
Accumulated Amortization (14.6) (14.7)
Net $ 35.7 $ 34.7