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RESTRUCTURING CHARGES (Details 2) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended | 33 Months Ended | 34 Months Ended | 35 Months Ended | 49 Months Ended | 93 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2023
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  | $ 89.6 | $ 25.3 | $ 27.9 |  |  |  |  | $ 386.2
Write-off of Equipment and Facility |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  | 17.7 | 3.3 | 0.0 |  |  |  |  | 158.0
Employee Severance and Related Benefit Costs |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  | 8.4 | 7.4 | 10.3 |  |  |  |  | 34.9
Facility Exit Costs |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  | 34.4 | 13.5 | 11.6 |  |  |  |  | 113.1
Employee Relocation Cost |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  | 1.7
Lease and Other Contract Termination Costs |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  | 29.1 | 1.1 | 6.0 |  |  |  |  | 78.5
McIntosh Plan | Chlor Alkali Products and Vinyls |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  | 4.7 | 8.3 | 5.6 |  | $ 18.6 |  |  |
McIntosh Plan | Chlor Alkali Products and Vinyls | Write-off of Equipment and Facility |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  | 2.7 |  |  |
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 | Facility Exit Costs |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  | 9.5 |  |  |
McIntosh Plan | Chlor Alkali Products and Vinyls | Employee Relocation Cost |  |  |  |  |  |  |  |  |
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 |  |  |
Freeport 2021 Plan | Chlor Alkali Products and Vinyls |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  | 4.0 | 2.6 | 6.5 |  |  | $ 13.1 |  |
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 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 | Facility Exit Costs |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  | 13.1 |  |
Freeport 2021 Plan | Chlor Alkali Products and Vinyls | Employee Relocation Cost |  |  |  |  |  |  |  |  |
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 2019 Plan | Chlor Alkali Products and Vinyls |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  | 7.5 | 6.0 | 3.9 |  |  |  | $ 80.1 |
Freeport 2019 Plan | Chlor Alkali Products and Vinyls | Write-off of Equipment and Facility |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  | 58.9 |
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 | Facility Exit Costs |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  | 19.1 |
Freeport 2019 Plan | Chlor Alkali Products and Vinyls | Employee Relocation Cost |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  | 0.0 |
Freeport 2019 Plan | Chlor Alkali Products and Vinyls | Lease and Other Contract Termination Costs |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  | $ 0.0 |
Chlor Alkali 2016 Plan | Chlor Alkali Products and Vinyls |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  |  | 0.4 | 1.6 |  |  |  |  | 182.7
Chlor Alkali 2016 Plan | Chlor Alkali Products and Vinyls | Write-off of Equipment and Facility |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  | 78.1
Chlor Alkali 2016 Plan | Chlor Alkali Products and Vinyls | Employee Severance and Related Benefit Costs |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  | 6.7
Chlor Alkali 2016 Plan | Chlor Alkali Products and Vinyls | Facility Exit Costs |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  | 53.2
Chlor Alkali 2016 Plan | Chlor Alkali Products and Vinyls | Employee Relocation Cost |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  | 1.7
Chlor Alkali 2016 Plan | Chlor Alkali Products and Vinyls | Lease and Other Contract Termination Costs |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  | $ 43.0
Stade Plan | Epoxy |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges | $ 81.4 | 73.4 | $ 8.0 |  |  |  |  |  |
Stade Plan | Epoxy | Write-off of Equipment and Facility |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  | 18.3 |  |  |  |  |  |  |
Stade Plan | Epoxy | Employee Severance and Related Benefit Costs |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  | 15.8 |  |  |  |  |  |  |
Stade Plan | Epoxy | Facility Exit Costs |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  | 18.2 |  |  |  |  |  |  |
Stade Plan | Epoxy | Employee Relocation Cost |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  | 0.0 |  |  |  |  |  |  |
Stade Plan | Epoxy | Lease and Other Contract Termination Costs |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  | $ 29.1 |  |  |  |  |  |  |
Productivity Plan | Corporate and Other |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  | $ 10.3 | $ 10.3 |  |  |  |
Productivity Plan | Corporate and Other | Write-off of Equipment and Facility |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  | 0.0 |  |  |  |
Productivity Plan | Corporate and Other | Employee Severance and Related Benefit Costs |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  | 10.3 |  |  |  |
Productivity Plan | Corporate and Other | Facility Exit Costs |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  | 0.0 |  |  |  |
Productivity Plan | Corporate and Other | Employee Relocation Cost |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  | 0.0 |  |  |  |
Productivity Plan | Corporate and Other | Lease and Other Contract Termination Costs |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  | $ 0.0 |  |  |  |

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