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, 2025
Dec. 31, 2024
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross $ 3,033.4 $ 3,021.8
Accumulated Amortization (1,559.4) (1,500.8)
Net 1,474.0 1,521.0
Purchased data files    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 1,119.7 1,111.9
Accumulated Amortization (693.3) (669.5)
Net 426.4 442.4
Customer relationships    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 946.5 937.7
Accumulated Amortization (502.1) (484.2)
Net 444.4 453.5
Proprietary database    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 701.2 704.9
Accumulated Amortization (237.9) (227.6)
Net 463.3 477.3
Acquired software and technology    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 216.9 217.6
Accumulated Amortization (114.4) (106.3)
Net 102.5 111.3
Trade names, non-compete agreements and other intangible assets    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 49.1 49.7
Accumulated Amortization (11.7) (13.2)
Net $ 37.4 $ 36.5