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GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Changes in the Carrying Amount of Goodwill, by Segment (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Goodwill |  |
Beginning balance |  | $ 626.1
Goodwill acquired during the year |  | 458.6
Currency translation adjustment | $ (14.3) | 41.8
Ending balance | 1,112.2 | 1,126.5
United States |  |
Goodwill |  |
Beginning balance |  | 567.2
Goodwill acquired during the year |  | 142.1
Currency translation adjustment | 0.0 | 0.0
Ending balance | 709.3 | 709.3
Europe |  |
Goodwill |  |
Beginning balance |  | 58.9
Goodwill acquired during the year |  | 0.0
Currency translation adjustment | (3.0) | 8.3
Ending balance | 64.2 | 67.2
Rest of World |  |
Goodwill |  |
Beginning balance |  | 0.0
Goodwill acquired during the year |  | 316.5
Currency translation adjustment | (11.3) | 33.5
Ending balance | $ 338.7 | $ 350.0

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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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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits 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 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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