Quarterly report pursuant to Section 13 or 15(d)

GOODWILL AND INTANGIBLE ASSETS - Purchased Intangible Assets (Details)

v3.8.0.1
GOODWILL AND INTANGIBLE ASSETS - Purchased Intangible Assets (Details) - USD ($)
$ in Millions
Sep. 30, 2017
Dec. 31, 2016
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross $ 2,054.1 $ 2,032.6
Accumulated Amortization (777.3) (708.8)
Net 1,276.8 1,323.8
Purchased data files    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 1,029.2 1,012.7
Accumulated Amortization (310.6) (276.0)
Net 718.6 736.7
Acquired software and technology    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 139.6 131.5
Accumulated Amortization (59.6) (36.1)
Net 80.0 95.4
Customer relationships    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 756.9 712.7
Accumulated Amortization (313.9) (273.0)
Net 443.0 439.7
Reacquired rights    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 73.3 73.3
Accumulated Amortization (62.4) (52.5)
Net 10.9 20.8
Proprietary database    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 22.1 21.5
Accumulated Amortization (8.1) (6.7)
Net 14.0 14.8
Non-compete agreements    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 14.1 26.8
Accumulated Amortization (12.1) (22.2)
Net 2.0 4.6
Trade names and other intangible assets    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 18.9 54.1
Accumulated Amortization (10.6) (42.3)
Net $ 8.3 $ 11.8