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
Jun. 30, 2022
Dec. 31, 2021
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross $ 2,836.9 $ 2,813.4
Accumulated Amortization (1,009.5) (915.4)
Net 1,827.4 1,898.0
Purchased data files    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 1,100.2 1,103.1
Accumulated Amortization (495.6) (466.0)
Net 604.6 637.1
Customer relationships    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 825.8 805.2
Accumulated Amortization (377.3) (354.9)
Net 448.5 450.3
Proprietary database    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 708.0 710.2
Accumulated Amortization (87.1) (59.3)
Net 620.9 650.9
Acquired software and technology    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 164.3 160.0
Accumulated Amortization (29.3) (18.9)
Net 135.0 141.1
Trade names and other intangible assets    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 25.0 23.9
Accumulated Amortization (15.5) (12.6)
Net 9.5 11.3
Non-compete agreements    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 13.6 11.0
Accumulated Amortization (4.7) (3.7)
Net $ 8.9 $ 7.3