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GOODWILL AND INTANGIBLES (Details 1) - USD ($) $ in Millions | 9 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017 | Dec. 31, 2016
Goodwill [Line Items] |  |  |  |
Goodwill | $ 2,119.6 | $ 2,119.8 | $ 2,120.0 | $ 2,118.0
Foreign currency translation adjustment | (0.4) | 1.8 |  |
Chlor Alkali Products and Vinyls Segment |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 1,832.6 | 1,832.7 | 1,832.9 | 1,831.3
Foreign currency translation adjustment | (0.3) | 1.4 |  |
Epoxy Segment |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 287.0 | 287.1 | $ 287.1 | $ 286.7
Foreign currency translation adjustment | $ (0.1) | $ 0.4 |  |

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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 + 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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