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GOODWILL AND INTANGIBLE ASSETS | 9 Months Ended
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Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
GOODWILL AND INTANGIBLES | NOTE 9. GOODWILL AND INTANGIBLE ASSETS Changes in the carrying value of goodwill were as follows:
| Chlor Alkali Products and Vinyls |  | Epoxy |  | Winchester |  | Total
Goodwill | ($ in millions)
Balance at January 1, 2024(1) | $ | 1,276.1 |  |  | $ | 145.2 |  |  | $ | 2.7 |  |  | $ | 1,424.0 |
Acquisition activity | — |  |  | — |  |  | (0.3) |  |  | (0.3) |
Balance at September 30, 2024(1) | $ | 1,276.1 |  |  | $ | 145.2 |  |  | $ | 2.4 |  |  | $ | 1,423.7 |
Balance at January 1, 2025(1) | $ | 1,276.4 |  |  | $ | 144.8 |  |  | $ | 2.4 |  |  | $ | 1,423.6 |
Acquisition activity | — |  |  | — |  |  | 2.4 |  |  | 2.4 |
Foreign currency translation adjustment | (0.1) |  |  | — |  |  | — |  |  | (0.1) |
Balance at September 30, 2025(1) | $ | 1,276.3 |  |  | $ | 144.8 |  |  | $ | 4.8 |  |  | $ | 1,425.9 |
(1)Includes cumulative goodwill impairment of $557.6 million and $142.2 million in Chlor Alkali Products and Vinyls and Epoxy, respectively. Intangible assets consisted of the following:
| September 30, 2025 |  | December 31, 2024 |  | September 30, 2024
| Gross Amount |  | Accumulated Amortization |  | Net |  | Gross Amount |  | Accumulated Amortization |  | Net |  | Gross Amount |  | Accumulated Amortization |  | Net
Intangible Assets | ($ in millions)
Customers, customer contracts and relationships | $ | 677.2 |  |  | $ | (502.3) |  |  | $ | 174.9 |  |  | $ | 666.7 |  |  | $ | (469.2) |  |  | $ | 197.5 |  |  | $ | 672.9 |  |  | $ | (464.3) |  |  | $ | 208.6 |
Trade names | 3.7 |  |  | (1.1) |  |  | 2.6 |  |  | 3.5 |  |  | (0.6) |  |  | 2.9 |  |  | 3.5 |  |  | (0.5) |  |  | 3.0 |
Acquired technology | 96.6 |  |  | (94.5) |  |  | 2.1 |  |  | 93.7 |  |  | (91.7) |  |  | 2.0 |  |  | 94.7 |  |  | (92.2) |  |  | 2.5 |
Other | 4.5 |  |  | (0.7) |  |  | 3.8 |  |  | 4.9 |  |  | (0.7) |  |  | 4.2 |  |  | 4.9 |  |  | (0.7) |  |  | 4.2 |
Total intangible assets | $ | 782.0 |  |  | $ | (598.6) |  |  | $ | 183.4 |  |  | $ | 768.8 |  |  | $ | (562.2) |  |  | $ | 206.6 |  |  | $ | 776.0 |  |  | $ | (557.7) |  |  | $ | 218.3 |

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-30/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-20/tableOfContent + Details
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