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RESTRUCTURING CHARGES (Details 1) $ in Millions | 3 Months Ended | 9 Months Ended | 52 Months Ended | 111 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2025 USD ($) | Jun. 30, 2025 USD ($) | Mar. 31, 2025 USD ($) | Sep. 30, 2024 USD ($) | Jun. 30, 2024 USD ($) | Mar. 31, 2024 USD ($) | Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Jun. 30, 2025 USD ($) | Jun. 30, 2025 USD ($) | Oct. 21, 2021 T | Dec. 11, 2019 T
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
McIntosh Restructuring Capacity Reduction | T |  |  |  |  |  |  |  |  |  |  | 400,000 |
Freeport Chlor Alkali Capacity Reduction | T |  |  |  |  |  |  |  |  |  |  |  | 230,000
Restructuring charges | $ 2.9 | $ 7.4 | $ 4.0 | $ 7.9 | $ 6.8 | $ 8.3 | $ 14.3 | $ 23.0 | $ 240.7 |  |  |
Additional restructuring and related expected cost | 75.0 |  |  |  |  |  | 75.0 |  |  |  |  |
Inception to date Amounts Utilized (cash) |  |  |  |  |  |  |  |  |  | $ 152.2 |  |
Inception to date Amounts Utilized (non-cash) |  |  |  |  |  |  |  |  |  | $ 79.9 |  |
Epoxy |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring charges | 0.0 |  |  | 0.0 |  |  | 0.0 | 0.0 | 111.8 |  |  |
Chlor Alkali Products and Vinyls |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring charges | $ 0.0 |  |  | $ 0.0 |  |  | $ 0.0 | $ 0.0 | $ 128.9 |  |  |

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