Quarterly report pursuant to Section 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, 2023
Dec. 31, 2022
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross $ 3,185.0 $ 2,937.1
Accumulated Amortization (1,281.1) (1,118.6)
Net 1,903.9 1,818.5
Purchased data files    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 1,136.5 1,090.0
Accumulated Amortization (574.5) (527.8)
Net 562.0 562.2
Customer relationships    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 1,036.7 874.6
Accumulated Amortization (455.2) (407.4)
Net 581.5 467.2
Proprietary database    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 706.3 705.9
Accumulated Amortization (157.3) (115.0)
Net 549.0 590.9
Acquired software and technology    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 222.2 225.4
Accumulated Amortization (66.1) (42.6)
Net 156.1 182.8
Trade names, non-compete agreements and other intangible assets    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 83.3 41.2
Accumulated Amortization (28.0) (25.8)
Net $ 55.3 $ 15.4