Annual report pursuant to Section 13 and 15(d)

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

v3.6.0.2
GOODWILL AND OTHER INTANGIBLE ASSETS (Purchased Intangible Assets) (Details) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross $ 2,032.6 $ 1,439.8
Accumulated Amortization (708.8) (611.9)
Net 1,323.8 827.9
Purchased data files    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 1,012.7 665.9
Accumulated Amortization (276.0) (240.6)
Net 736.7 425.3
Acquired software and technology    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 131.5 52.4
Accumulated Amortization (36.1) (35.5)
Net 95.4 16.9
Customer relationships    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 712.7 565.9
Accumulated Amortization (273.0) (239.3)
Net 439.7 326.6
Reacquired rights    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 73.3 73.3
Accumulated Amortization (52.5) (39.4)
Net 20.8 33.9
Proprietary database    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 21.5 7.4
Accumulated Amortization (6.7) (5.8)
Net 14.8 1.6
Non-compete agreements    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 26.8 25.8
Accumulated Amortization (22.2) (18.3)
Net 4.6 7.5
Trade names and other intangible assets    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 54.1 49.1
Accumulated Amortization (42.3) (33.0)
Net $ 11.8 $ 16.1