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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Transaction Gains (Losses) Resulting from Remeasurement) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Foreign Currency Transaction Gain (Loss), before Tax | $ (2.7) | $ 0.8 | $ 3.3
Transaction Gains and Losses Resulting from Remeasurement [Member] |  |  |
Foreign Currency Transaction Gain (Loss), before Tax | 11.4 | (16.8) | 16.3
Cash and Cash Equivalents [Member] |  |  |
Foreign Currency Transaction Gain (Loss), before Tax | (2.5) | (1.0) | 1.5
Intercompany loan [Member] |  |  |
Foreign Currency Transaction Gain (Loss), before Tax | $ 16.6 | $ (16.6) | $ 11.5

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- Definition Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64836518&loc=d3e30700-110894 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=64836518&loc=d3e30690-110894 + Details
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