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
Mar. 31, 2024
Dec. 31, 2023
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross $ 3,184.4 $ 3,219.9
Accumulated Amortization (1,410.9) (1,361.1)
Net 1,773.5 1,858.8
Purchased data files    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 1,141.8 1,158.5
Accumulated Amortization (618.6) (604.2)
Net 523.2 554.3
Customer relationships    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 1,040.7 1,053.5
Accumulated Amortization (498.7) (484.2)
Net 542.0 569.3
Proprietary database    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 705.7 705.8
Accumulated Amortization (185.6) (171.5)
Net 520.1 534.3
Acquired software and technology    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 222.2 222.5
Accumulated Amortization (84.2) (75.4)
Net 138.0 147.1
Trade names, non-compete agreements and other intangible assets    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 74.0 79.6
Accumulated Amortization (23.8) (25.8)
Net $ 50.2 $ 53.8