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GOODWILL AND INTANGIBLE ASSETS (Purchased Intangible Assets) (Details) - USD ($) $ in Millions | Sep. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | $ 2,105.2 | $ 1,439.8
Accumulated Amortization | (698.8) | (611.9)
Net | 1,406.4 | 827.9
Purchased data files |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | 1,041.0 | 665.9
Accumulated Amortization | (264.9) | (240.6)
Net | 776.1 | 425.3
Acquired software and technology |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | 149.9 | 52.4
Accumulated Amortization | (44.3) | (35.5)
Net | 105.6 | 16.9
Customer relationships |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | 733.8 | 565.9
Accumulated Amortization | (270.5) | (239.3)
Net | 463.3 | 326.6
Reacquired rights |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | 73.3 | 73.3
Accumulated Amortization | (49.2) | (39.4)
Net | 24.1 | 33.9
Proprietary database |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | 21.5 | 7.4
Accumulated Amortization | (6.3) | (5.8)
Net | 15.2 | 1.6
Non-compete agreements |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | 27.8 | 25.8
Accumulated Amortization | (21.1) | (18.3)
Net | 6.7 | 7.5
Trade names and other intangible assets |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | 57.9 | 49.1
Accumulated Amortization | (42.5) | (33.0)
Net | $ 15.4 | $ 16.1

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