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RESTRUCTURING CHARGES (Details Textuals) $ in Millions | 3 Months Ended | 9 Months Ended | 30 Months Ended | 46 Months Ended | 95 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Sep. 30, 2017 USD ($) | Jun. 30, 2017 USD ($) | Mar. 31, 2017 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2017 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Mar. 21, 2016 T | Dec. 12, 2014 T | Dec. 31, 2011 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring charges | $ 3.3 | $ 6.4 | $ 4.0 | $ 9.2 | $ 8.5 | $ 8.2 | $ 13.7 | $ 25.9 |  |  | $ 200.9 |  |  |  |  |
Inception to date Amounts Utilized (cash) |  |  |  |  |  |  |  |  |  |  | 107.3 |  |  |  |  |
Inception to date Amounts Utilized (non-cash) |  |  |  |  |  |  |  |  |  |  | 86.1 |  |  |  |  |
Accrued restructuring costs | 7.5 |  |  | 21.9 |  |  | 7.5 | 21.9 | $ 7.5 | $ 7.5 | 7.5 | $ 5.1 | $ 12.7 |  |  |
Chlor Alkali Products and Vinyls Capacity Reductions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Product Segment Production Capacity Decrease | T |  |  |  |  |  |  |  |  |  |  |  |  |  | 433,000 |  |
Henderson Product Segment Production Capacity Decrease | T |  |  |  |  |  |  |  |  |  |  |  |  |  | 153,000 |  |
Niagara Product Segment Production Capacity | T |  |  |  |  |  |  |  |  |  |  |  |  |  | 300,000 |  |
Reduced Niagara Segment Production Capacity | T |  |  |  |  |  |  |  |  |  |  |  |  |  | 240,000 |  |
Freeport Product Segment Production Capacity Decrease | T |  |  |  |  |  |  |  |  |  |  |  |  |  | 220,000 |  |
Restructuring charges | 3.3 |  |  | 8.8 |  |  | 12.4 | 23.7 | 156.4 |  |  |  |  |  |  |
Additional restructuring and related expected cost | 14.0 |  |  |  |  |  | 14.0 |  | 14.0 | 14.0 | 14.0 |  |  |  |  |
Chlor Alkali Products and Vinyls Becancour |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring charges | 0.0 |  |  | $ 0.4 |  |  | 1.3 | $ 2.2 |  | 17.4 |  |  |  |  |  |
Tonnage reduction in chlor alkali manufacutring capactiy (in tons) | T |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 185,000 |
Additional restructuring and related expected cost | 1.0 |  |  |  |  |  | 1.0 |  | 1.0 | 1.0 | 1.0 |  |  |  |  |
Winchester Segment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  |  |  | 27.1 |  |  |  |  |
Estimated Project Cost For Plant Relocation | 110.0 |  |  |  |  |  | 110.0 |  | 110.0 | 110.0 | 110.0 |  |  |  |  |
Estimated Capital Spending For Facility Relocation | $ 80.0 |  |  |  |  |  | $ 80.0 |  | $ 80.0 | $ 80.0 | $ 80.0 |  |  |  |  |
Government Grants for Facility Relocation Capital Spending |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 31.0

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