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GOODWILL AND INTANGIBLE ASSETS (Details 1) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Goodwill [Line Items] |  |  |  |
Goodwill | $ 1,424.0 | $ 1,420.9 | $ 1,420.6 |
Foreign currency translation adjustment | 0.4 | 0.3 |  |
Goodwill, Acquired During Period | 2.7 |  |  |
Goodwill, Impairment Loss | 0.0 | 0.0 |  |
Amortization | 37.0 | 55.3 | 63.1 |
Chlor Alkali Products and Vinyls |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 1,276.1 | 1,275.8 | 1,275.6 |
Foreign currency translation adjustment | 0.3 | 0.2 |  |
Goodwill, Acquired During Period | 0.0 |  |  |
Goodwill, Impairment Loss |  |  |  | $ 557.6
Epoxy |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 145.2 | 145.1 | 145.0 |
Foreign currency translation adjustment | 0.1 | 0.1 |  |
Goodwill, Acquired During Period | 0.0 |  |  |
Goodwill, Impairment Loss |  |  |  | $ 142.2
Winchester |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 2.7 | 0.0 | $ 0.0 |
Foreign currency translation adjustment | 0.0 | $ 0.0 |  |
Goodwill, Acquired During Period | $ 2.7 |  |  |

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