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, 2022
Dec. 31, 2021
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross $ 2,884.8 $ 2,813.4
Accumulated Amortization (977.0) (915.4)
Net 1,907.8 1,898.0
Purchased data files    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 1,115.7 1,103.1
Accumulated Amortization (489.5) (466.0)
Net 626.2 637.1
Customer relationships    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 854.2 805.2
Accumulated Amortization (372.1) (354.9)
Net 482.1 450.3
Proprietary database    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 709.4 710.2
Accumulated Amortization (73.3) (59.3)
Net 636.1 650.9
Acquired software and technology    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 165.7 160.0
Accumulated Amortization (23.2) (18.9)
Net 142.5 141.1
Trade names and other intangible assets    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 26.2 23.9
Accumulated Amortization (14.5) (12.6)
Net 11.7 11.3
Non-compete agreements    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 13.6 11.0
Accumulated Amortization (4.4) (3.7)
Net $ 9.2 $ 7.3