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RESTRUCTURING CHARGES (Details 3) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 40 Months Ended | 41 Months Ended | 55 Months Ended | 99 Months Ended
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2023 | Mar. 31, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2024 | Jun. 30, 2024 | Jun. 30, 2024
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring charges | $ 6.8 | $ 8.3 | $ 19.2 | $ 60.9 | $ 15.1 | $ 80.1 |  |  |  | $ 208.3
Employee severance and related benefit costs |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring charges | 0.0 | 0.0 | 3.3 | 0.0 |  |  |  |  |  | 17.9
Lease and other contract termination costs |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring charges | 1.7 | 0.0 | 1.7 | 39.7 |  |  |  |  |  | 37.2
Facility exit costs |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring charges | 5.1 | 8.3 | 9.3 | 8.4 |  |  |  |  |  | 73.3
Write-off of equipment and facility |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring charges | 0.0 | $ 0.0 | 4.9 | $ 12.8 |  |  |  |  |  | 79.9
McIntosh Plan | Chlor Alkali Products and Vinyls |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring charges | 0.1 |  | 2.5 |  | 2.0 | 3.9 | $ 20.5 |  |  |
McIntosh Plan | Chlor Alkali Products and Vinyls | Employee severance and related benefit costs |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  | 0.0 |  |  |
McIntosh Plan | Chlor Alkali Products and Vinyls | Lease and other contract termination costs |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  | 6.4 |  |  |
McIntosh Plan | Chlor Alkali Products and Vinyls | Facility exit costs |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  | 11.4 |  |  |
McIntosh Plan | Chlor Alkali Products and Vinyls | Write-off of equipment and facility |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  | $ 2.7 |  |  |
Freeport 2021 Plan | Chlor Alkali Products and Vinyls |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring charges | 0.3 |  | 1.4 |  | 0.7 | 2.1 |  | $ 13.8 |  |
Freeport 2021 Plan | Chlor Alkali Products and Vinyls | Employee severance and related benefit costs |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  | 0.0 |  |
Freeport 2021 Plan | Chlor Alkali Products and Vinyls | Lease and other contract termination costs |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  | 0.0 |  |
Freeport 2021 Plan | Chlor Alkali Products and Vinyls | Facility exit costs |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  | 13.8 |  |
Freeport 2021 Plan | Chlor Alkali Products and Vinyls | Write-off of equipment and facility |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  | $ 0.0 |  |
Freeport 2019 Plan | Chlor Alkali Products and Vinyls |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring charges | 0.6 |  | 2.0 |  | 3.1 | 3.0 |  |  | $ 83.2 |
Freeport 2019 Plan | Chlor Alkali Products and Vinyls | Employee severance and related benefit costs |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  | 2.1 |
Freeport 2019 Plan | Chlor Alkali Products and Vinyls | Lease and other contract termination costs |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  | 0.0 |
Freeport 2019 Plan | Chlor Alkali Products and Vinyls | Facility exit costs |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  | 22.2 |
Freeport 2019 Plan | Chlor Alkali Products and Vinyls | Write-off of equipment and facility |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  | $ 58.9 |
Epoxy Optimization Plan | Epoxy |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring charges | $ 5.8 |  | $ 13.3 |  | $ 9.3 | $ 71.1 |  |  |  | 90.8
Epoxy Optimization Plan | Epoxy | Employee severance and related benefit costs |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  |  | 15.8
Epoxy Optimization Plan | Epoxy | Lease and other contract termination costs |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  |  | 30.8
Epoxy Optimization Plan | Epoxy | Facility exit costs |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  |  | 25.9
Epoxy Optimization Plan | Epoxy | Write-off of equipment and facility |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  |  | $ 18.3

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