Annual report pursuant to Section 13 and 15(d)

ACQUISITIONS AND INVESTMENTS - Acquired Intangible Assets Fair Value and Weighted-Average Useful Life (Details)

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ACQUISITIONS AND INVESTMENTS - Acquired Intangible Assets Fair Value and Weighted-Average Useful Life (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Business Acquisition [Line Items]    
Fair value $ 187.4 $ 1,094.1
Weighted-average useful life 8 years 9 months 18 days 12 years 7 months 6 days
Proprietary database    
Business Acquisition [Line Items]    
Fair value $ 0.0 $ 562.3
Weighted-average useful life 0 years 14 years 6 months
Purchased data files    
Business Acquisition [Line Items]    
Fair value $ 14.9 $ 207.0
Weighted-average useful life 15 years 15 years
Customer relationships    
Business Acquisition [Line Items]    
Fair value $ 89.5 $ 160.7
Weighted-average useful life 10 years 10 years
Acquired software and technology    
Business Acquisition [Line Items]    
Fair value $ 74.8 $ 146.3
Weighted-average useful life 6 years 7 months 6 days 6 years
Trade names and other intangible assets    
Business Acquisition [Line Items]    
Fair value $ 4.5 $ 11.3
Weighted-average useful life 2 years 2 years
Non-compete agreements    
Business Acquisition [Line Items]    
Fair value $ 3.7 $ 6.5
Weighted-average useful life 7 years 10 months 24 days 4 years 6 months