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
Jun. 30, 2026
Dec. 31, 2025
Intangible Asset, Finite-Lived, Acquired [Line Items]    
Gross $ 3,010.5 $ 3,048.8
Accumulated Amortization (1,786.3) (1,717.5)
Net 1,224.2 1,331.3
Purchased data files    
Intangible Asset, Finite-Lived, Acquired [Line Items]    
Gross 1,153.4 1,141.2
Accumulated Amortization (816.5) (767.6)
Net 336.9 373.6
Customer relationships    
Intangible Asset, Finite-Lived, Acquired [Line Items]    
Gross 926.9 922.1
Accumulated Amortization (553.6) (523.2)
Net 373.3 398.9
Proprietary database    
Intangible Asset, Finite-Lived, Acquired [Line Items]    
Gross 663.6 720.2
Accumulated Amortization (243.8) (272.6)
Net 419.8 447.6
Acquired software and technology    
Intangible Asset, Finite-Lived, Acquired [Line Items]    
Gross 216.0 215.9
Accumulated Amortization (156.8) (139.4)
Net 59.2 76.5
Trade names, non-compete agreements and other intangible assets    
Intangible Asset, Finite-Lived, Acquired [Line Items]    
Gross 50.6 49.4
Accumulated Amortization (15.6) (14.7)
Net $ 35.0 $ 34.7