Annual report pursuant to Section 13 and 15(d)

GOODWILL AND OTHER INTANGIBLE ASSETS - Purchased Intangible Assets (Details)

v3.20.4
GOODWILL AND OTHER INTANGIBLE ASSETS - Purchased Intangible Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross $ 1,878.6 $ 1,820.5
Accumulated Amortization (880.8) (775.9)
Net 997.8 1,044.6
Purchased data files    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 913.7 904.0
Accumulated Amortization (399.2) (351.8)
Net 514.5 552.2
Acquired software and technology    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 115.3 110.1
Accumulated Amortization (106.6) (84.0)
Net 8.7 26.1
Customer relationships    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 680.1 673.0
Accumulated Amortization (331.4) (305.1)
Net 348.7 367.9
Reacquired rights    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 0.0 0.0
Accumulated Amortization 0.0 0.0
Net 0.0 0.0
Proprietary database    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 148.6 108.3
Accumulated Amortization (30.7) (20.9)
Net 117.9 87.4
Non-compete agreements    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 6.5 7.8
Accumulated Amortization (3.5) (3.5)
Net 3.0 4.3
Trade names and other intangible assets    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 14.4 17.3
Accumulated Amortization (9.4) (10.6)
Net $ 5.0 $ 6.7