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Goodwill
 9 Months Ended
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.