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GOODWILL AND OTHER INTANGIBLE ASSETS - Changes in Amount of Goodwill (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Goodwill [Roll Forward] |  |
Beginning Balance | $ 4,184.0 | $ 3,974.3
Acquisitions | 89.3 | 92.4
Adjustments to initial purchase price allocation | 1.2 | 1.0
Foreign currency translation | (144.8) | 116.3
Ending Balance | 4,129.7 | 4,184.0
U.S. Information Solutions |  |
Goodwill [Roll Forward] |  |
Beginning Balance | 1,071.3 | 1,071.3
Acquisitions | 57.7 | 0.0
Adjustments to initial purchase price allocation | (0.1) | 0.0
Foreign currency translation | 0.0 | 0.0
Ending Balance | 1,128.9 | 1,071.3
International |  |
Goodwill [Roll Forward] |  |
Beginning Balance | 1,969.4 | 1,814.6
Acquisitions | 14.5 | 43.9
Adjustments to initial purchase price allocation | 1.3 | 1.0
Foreign currency translation | (140.5) | 109.9
Ending Balance | 1,844.7 | 1,969.4
Workforce Solutions |  |
Goodwill [Roll Forward] |  |
Beginning Balance | 952.1 | 952.1
Acquisitions | 17.1 | 0.0
Adjustments to initial purchase price allocation | 1.0 | 0.0
Foreign currency translation | 0.0 | 0.0
Ending Balance | 970.2 | 952.1
Global Consumer Solutions |  |
Goodwill [Roll Forward] |  |
Beginning Balance | 191.2 | 136.3
Acquisitions | 0.0 | 48.5
Adjustments to initial purchase price allocation | (1.0) | 0.0
Foreign currency translation | (4.3) | 6.4
Ending Balance | $ 185.9 | $ 191.2

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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