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Goodwill | 9 Months Ended
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Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill | NOTE 4 – GOODWILL The following table summarizes the goodwill movements in the year:
(in millions) |  | Gross Cost |
Opening balance at January 1, 2023 |  | $ | 358.8 |
Exchange effect |  |  | (0.9 | )
Closing balance at September 30, 2023 |  | $ | 357.9 |
The exchange effect for the nine months ended September 30, 2023 was $0.9 million relating to our Performance Chemicals segment.

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