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GOODWILL AND OTHER INTANGIBLE ASSETS (Purchased Intangible Assets) (Detail) - USD ($) $ in Millions | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | $ 1,439.8 | $ 1,475.4
Accumulated Amortization | (611.9) | (521.5)
Net | 827.9 | 953.9
Purchased data files |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | 665.9 | 692.0
Accumulated Amortization | (240.6) | (218.8)
Net | 425.3 | 473.2
Acquired software and technology |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | 52.4 | 53.9
Accumulated Amortization | (35.5) | (26.4)
Net | 16.9 | 27.5
Customer relationships |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | 565.9 | 570.7
Accumulated Amortization | (239.3) | (204.3)
Net | 326.6 | 366.4
Reacquired rights |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | 73.3 | 73.3
Accumulated Amortization | (39.4) | (26.3)
Net | 33.9 | 47.0
Proprietary database |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | 7.4 | 7.4
Accumulated Amortization | (5.8) | (5.4)
Net | 1.6 | 2.0
Non-compete agreements |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | 25.8 | 27.0
Accumulated Amortization | (18.3) | (11.8)
Net | 7.5 | 15.2
Trade names and other intangible assets |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | 49.1 | 51.1
Accumulated Amortization | (33.0) | (28.5)
Net | $ 16.1 | $ 22.6

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