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SEGMENT INFORMATION (Details 3) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disaggregation of Revenue [Line Items] |  |  |
Sales | $ 6,833.0 | $ 9,376.2 | $ 8,910.6
U.S. |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 4,599.4 | 5,722.1 | 5,268.0
Europe |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 603.7 | 1,547.8 | 1,680.8
Other foreign |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 1,629.9 | 2,106.3 | 1,961.8
Chlor Alkali Products and Vinyls |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 3,995.1 | 5,085.0 | 4,140.8
Chlor Alkali Products and Vinyls | Caustic soda |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 1,790.0 | 2,389.1 | 1,869.3
Chlor Alkali Products and Vinyls | Chlorine, chlorine derivatives and other products |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 2,205.1 | 2,695.9 | 2,271.5
Chlor Alkali Products and Vinyls | U.S. |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 2,700.0 | 3,400.0 | 2,839.1
Chlor Alkali Products and Vinyls | Europe |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 207.9 | 331.9 | 203.5
Chlor Alkali Products and Vinyls | Other foreign |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 1,087.2 | 1,353.1 | 1,098.2
Epoxy |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 1,329.2 | 2,690.5 | 3,186.0
Epoxy | Aromatics and allylics |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 525.1 | 1,338.6 | 1,450.5
Epoxy | Epoxy resins |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 804.1 | 1,351.9 | 1,735.5
Epoxy | U.S. |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 562.8 | 855.1 | 926.7
Epoxy | Europe |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 338.5 | 1,181.8 | 1,457.9
Epoxy | Other foreign |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 427.9 | 653.6 | 801.4
Winchester |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 1,508.7 | 1,600.7 | 1,583.8
Winchester | Commercial |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 806.5 | 1,079.1 | 1,104.1
Winchester | Military and law enforcement |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 702.2 | 521.6 | 479.7
Winchester | U.S. |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 1,336.6 | 1,467.0 | 1,502.2
Winchester | Europe |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 57.3 | 34.1 | 19.4
Winchester | Other foreign |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | $ 114.8 | $ 99.6 | $ 62.2

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