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
Sep. 30, 2026
Dec. 31, 2025
Intangible Asset, Finite-Lived, Acquired [Line Items]    
Gross $ 2,991.9 $ 3,048.8
Accumulated Amortization (1,826.1) (1,717.5)
Net 1,165.8 1,331.3
Purchased data files    
Intangible Asset, Finite-Lived, Acquired [Line Items]    
Gross 1,157.9 1,141.2
Accumulated Amortization (840.7) (767.6)
Net 317.2 373.6
Customer relationships    
Intangible Asset, Finite-Lived, Acquired [Line Items]    
Gross 928.2 922.1
Accumulated Amortization (572.1) (523.2)
Net 356.1 398.9
Proprietary database    
Intangible Asset, Finite-Lived, Acquired [Line Items]    
Gross 643.9 720.2
Accumulated Amortization (236.1) (272.6)
Net 407.8 447.6
Acquired software and technology    
Intangible Asset, Finite-Lived, Acquired [Line Items]    
Gross 212.9 215.9
Accumulated Amortization (162.4) (139.4)
Net 50.5 76.5
Trade names, non-compete agreements and other intangible assets    
Intangible Asset, Finite-Lived, Acquired [Line Items]    
Gross 49.0 49.4
Accumulated Amortization (14.8) (14.7)
Net $ 34.2 $ 34.7