SEGMENT INFORMATION (Details 2) - USD ($)
$ in Millions |
3 Months Ended |
9 Months Ended |
52 Months Ended |
|
Sep. 30, 2025 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Sep. 30, 2024 |
Jun. 30, 2024 |
Mar. 31, 2024 |
Sep. 30, 2025 |
Sep. 30, 2024 |
Jun. 30, 2025 |
Dec. 31, 2024 |
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
$ 1,713.2
|
|
|
$ 1,589.5
|
|
|
$ 5,115.7
|
$ 4,868.8
|
|
|
| Cost of goods sold |
1,529.8
|
|
|
1,455.0
|
|
|
4,645.5
|
4,289.2
|
|
|
| Gross Profit |
183.4
|
|
|
134.5
|
|
|
470.2
|
579.6
|
|
|
| Segment Reporting, Other Segment Item, Amount |
(99.1)
|
|
|
(111.7)
|
|
|
(296.7)
|
(308.2)
|
|
|
| Restructuring charges |
(2.9)
|
$ (7.4)
|
$ (4.0)
|
(7.9)
|
$ (6.8)
|
$ (8.3)
|
(14.3)
|
(23.0)
|
$ (240.7)
|
|
| Other Operating Income |
0.4
|
|
|
0.6
|
|
|
0.2
|
0.8
|
|
|
| Interest Expense, Operating and Nonoperating |
(46.8)
|
|
|
(48.4)
|
|
|
(142.1)
|
(139.6)
|
|
|
| Interest income |
1.6
|
|
|
1.0
|
|
|
4.0
|
2.7
|
|
|
| Non-operating pension income |
4.9
|
|
|
6.7
|
|
|
15.5
|
19.4
|
|
|
| Income (loss) before taxes |
41.5
|
|
|
(25.2)
|
|
|
36.8
|
131.7
|
|
|
| Depreciation and amortization |
133.8
|
|
|
130.2
|
|
|
395.9
|
388.9
|
|
|
| Segment, Expenditure, Addition to Long-Lived Assets |
71.1
|
|
|
44.7
|
|
|
163.5
|
148.4
|
|
|
| Assets |
7,600.9
|
|
|
7,518.3
|
|
|
7,600.9
|
7,518.3
|
|
$ 7,579.1
|
| Transferred over Time |
|
|
|
|
|
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
90.4
|
|
|
63.0
|
|
|
243.3
|
120.6
|
|
|
| United States |
|
|
|
|
|
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
1,136.1
|
|
|
1,130.0
|
|
|
3,475.2
|
3,508.4
|
|
|
| Europe |
|
|
|
|
|
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
159.3
|
|
|
145.8
|
|
|
462.7
|
438.3
|
|
|
| Other foreign |
|
|
|
|
|
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
417.8
|
|
|
313.7
|
|
|
1,177.8
|
922.1
|
|
|
| Chlor Alkali Products and Vinyls |
|
|
|
|
|
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
924.0
|
|
|
871.6
|
|
|
2,828.0
|
2,676.5
|
|
|
| Cost of goods sold |
758.0
|
|
|
778.7
|
|
|
2,431.8
|
2,323.2
|
|
|
| Gross Profit |
166.0
|
|
|
92.9
|
|
|
396.2
|
353.3
|
|
|
| Segment Reporting, Other Segment Item, Amount |
(38.4)
|
|
|
(47.6)
|
|
|
(125.4)
|
(132.1)
|
|
|
| Restructuring charges |
0.0
|
|
|
0.0
|
|
|
0.0
|
0.0
|
(128.9)
|
|
| Other Operating Income |
0.0
|
|
|
|
|
|
0.0
|
0.0
|
|
|
| Interest Expense, Operating and Nonoperating |
0.0
|
|
|
0.0
|
|
|
0.0
|
0.0
|
|
|
| Interest income |
0.0
|
|
|
0.0
|
|
|
0.0
|
0.0
|
|
|
| Non-operating pension income |
0.0
|
|
|
0.0
|
|
|
0.0
|
0.0
|
|
|
| Income (loss) before taxes |
127.6
|
|
|
45.3
|
|
|
270.8
|
221.2
|
|
|
| Depreciation and amortization |
109.0
|
|
|
106.5
|
|
|
322.5
|
319.1
|
|
|
| Segment, Expenditure, Addition to Long-Lived Assets |
56.2
|
|
|
31.2
|
|
|
108.0
|
109.0
|
|
|
| Assets |
5,203.8
|
|
|
5,307.7
|
|
|
5,203.8
|
5,307.7
|
|
|
| Chlor Alkali Products and Vinyls | Caustic soda |
|
|
|
|
|
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
410.2
|
|
|
352.1
|
|
|
1,232.1
|
1,084.6
|
|
|
| Chlor Alkali Products and Vinyls | Chlorine, chlorine-derivatives and other co-products |
|
|
|
|
|
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
513.8
|
|
|
519.5
|
|
|
1,595.9
|
1,591.9
|
|
|
| Chlor Alkali Products and Vinyls | United States |
|
|
|
|
|
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
624.7
|
|
|
616.9
|
|
|
1,935.8
|
1,924.0
|
|
|
| Chlor Alkali Products and Vinyls | Europe |
|
|
|
|
|
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
48.4
|
|
|
48.5
|
|
|
123.6
|
129.3
|
|
|
| Chlor Alkali Products and Vinyls | Other foreign |
|
|
|
|
|
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
250.9
|
|
|
206.2
|
|
|
768.6
|
623.2
|
|
|
| Epoxy |
|
|
|
|
|
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
349.6
|
|
|
285.1
|
|
|
1,012.5
|
944.1
|
|
|
| Cost of goods sold |
367.4
|
|
|
313.2
|
|
|
1,052.5
|
959.9
|
|
|
| Gross Profit |
(17.8)
|
|
|
(28.1)
|
|
|
(40.0)
|
(15.8)
|
|
|
| Segment Reporting, Other Segment Item, Amount |
(14.4)
|
|
|
(14.7)
|
|
|
(44.3)
|
(41.8)
|
|
|
| Restructuring charges |
0.0
|
|
|
0.0
|
|
|
0.0
|
0.0
|
$ (111.8)
|
|
| Other Operating Income |
0.0
|
|
|
|
|
|
0.0
|
0.0
|
|
|
| Interest Expense, Operating and Nonoperating |
0.0
|
|
|
0.0
|
|
|
0.0
|
0.0
|
|
|
| Interest income |
0.0
|
|
|
0.0
|
|
|
0.0
|
0.0
|
|
|
| Non-operating pension income |
0.0
|
|
|
0.0
|
|
|
0.0
|
0.0
|
|
|
| Income (loss) before taxes |
(32.2)
|
|
|
(42.8)
|
|
|
(84.3)
|
(57.6)
|
|
|
| Depreciation and amortization |
13.2
|
|
|
13.7
|
|
|
39.1
|
40.6
|
|
|
| Segment, Expenditure, Addition to Long-Lived Assets |
3.3
|
|
|
4.6
|
|
|
16.1
|
15.0
|
|
|
| Assets |
923.8
|
|
|
924.5
|
|
|
923.8
|
924.5
|
|
|
| Epoxy | Aromatics and allylics |
|
|
|
|
|
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
128.5
|
|
|
105.8
|
|
|
400.3
|
389.0
|
|
|
| Epoxy | Epoxy resins |
|
|
|
|
|
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
221.1
|
|
|
179.3
|
|
|
612.2
|
555.1
|
|
|
| Epoxy | United States |
|
|
|
|
|
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
139.5
|
|
|
136.2
|
|
|
424.4
|
474.3
|
|
|
| Epoxy | Europe |
|
|
|
|
|
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
88.1
|
|
|
75.1
|
|
|
283.3
|
239.3
|
|
|
| Epoxy | Other foreign |
|
|
|
|
|
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
122.0
|
|
|
73.8
|
|
|
304.8
|
230.5
|
|
|
| Winchester |
|
|
|
|
|
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
439.6
|
|
|
432.8
|
|
|
1,275.2
|
1,248.2
|
|
|
| Cost of goods sold |
398.5
|
|
|
356.8
|
|
|
1,143.7
|
985.9
|
|
|
| Gross Profit |
41.1
|
|
|
76.0
|
|
|
131.5
|
262.3
|
|
|
| Segment Reporting, Other Segment Item, Amount |
(21.8)
|
|
|
(22.6)
|
|
|
(64.4)
|
(66.4)
|
|
|
| Restructuring charges |
0.0
|
|
|
0.0
|
|
|
0.0
|
0.0
|
|
|
| Other Operating Income |
0.0
|
|
|
|
|
|
0.0
|
0.0
|
|
|
| Interest Expense, Operating and Nonoperating |
0.0
|
|
|
0.0
|
|
|
0.0
|
0.0
|
|
|
| Interest income |
0.0
|
|
|
0.0
|
|
|
0.0
|
0.0
|
|
|
| Non-operating pension income |
0.0
|
|
|
0.0
|
|
|
0.0
|
0.0
|
|
|
| Income (loss) before taxes |
19.3
|
|
|
53.4
|
|
|
67.1
|
195.9
|
|
|
| Depreciation and amortization |
7.8
|
|
|
8.5
|
|
|
25.2
|
24.7
|
|
|
| Segment, Expenditure, Addition to Long-Lived Assets |
10.3
|
|
|
8.8
|
|
|
33.1
|
23.9
|
|
|
| Assets |
924.5
|
|
|
797.5
|
|
|
924.5
|
797.5
|
|
|
| Winchester | Commercial |
|
|
|
|
|
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
166.0
|
|
|
191.6
|
|
|
491.6
|
656.4
|
|
|
| Winchester | Military and law enforcement |
|
|
|
|
|
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
273.6
|
|
|
241.2
|
|
|
783.6
|
591.8
|
|
|
| Winchester | United States |
|
|
|
|
|
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
371.9
|
|
|
376.9
|
|
|
1,115.0
|
1,110.1
|
|
|
| Winchester | Europe |
|
|
|
|
|
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
22.8
|
|
|
22.2
|
|
|
55.8
|
69.7
|
|
|
| Winchester | Other foreign |
|
|
|
|
|
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
44.9
|
|
|
33.7
|
|
|
104.4
|
68.4
|
|
|
| Corporate/ other |
|
|
|
|
|
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
0.0
|
|
|
0.0
|
|
|
0.0
|
0.0
|
|
|
| Cost of goods sold |
5.9
|
|
|
6.3
|
|
|
17.5
|
20.2
|
|
|
| Gross Profit |
(5.9)
|
|
|
(6.3)
|
|
|
(17.5)
|
(20.2)
|
|
|
| Segment Reporting, Other Segment Item, Amount |
(24.5)
|
|
|
(26.8)
|
|
|
(62.6)
|
(67.9)
|
|
|
| Restructuring charges |
(2.9)
|
|
|
(7.9)
|
|
|
(14.3)
|
(23.0)
|
|
|
| Other Operating Income |
0.4
|
|
|
0.6
|
|
|
0.2
|
0.8
|
|
|
| Interest Expense, Operating and Nonoperating |
46.8
|
|
|
48.4
|
|
|
142.1
|
139.6
|
|
|
| Interest income |
1.6
|
|
|
1.0
|
|
|
4.0
|
2.7
|
|
|
| Non-operating pension income |
4.9
|
|
|
6.7
|
|
|
15.5
|
19.4
|
|
|
| Income (loss) before taxes |
(73.2)
|
|
|
(81.1)
|
|
|
(216.8)
|
(227.8)
|
|
|
| Depreciation and amortization |
3.8
|
|
|
1.5
|
|
|
9.1
|
4.5
|
|
|
| Segment, Expenditure, Addition to Long-Lived Assets |
1.3
|
|
|
0.1
|
|
|
6.3
|
0.5
|
|
|
| Assets |
548.8
|
|
|
488.6
|
|
|
548.8
|
488.6
|
|
|
| Corporate/ other | United States |
|
|
|
|
|
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
0.0
|
|
|
0.0
|
|
|
0.0
|
0.0
|
|
|
| Corporate/ other | Europe |
|
|
|
|
|
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
0.0
|
|
|
0.0
|
|
|
0.0
|
0.0
|
|
|
| Corporate/ other | Other foreign |
|
|
|
|
|
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
|
|
|
|
|
| Sales |
$ 0.0
|
|
|
$ 0.0
|
|
|
$ 0.0
|
$ 0.0
|
|
|