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Goodwill (Tables)
 12 Months Ended
Dec. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Summary of Goodwill

The following table analyzes goodwill movement for 2025 and 2024.

 

(in millions)

 

Performance
Chemicals

 

 

Fuel
Specialties

 

 

Oilfield
Services

 

 

Total

 

At December 31, 2023

 

 

 

 

 

 

 

 

 

 

 

 

Gross cost

 

$

146.9

 

 

$

207.6

 

 

$

44.8

 

 

$

399.3

 

Accumulated impairment losses

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

Net book amount

 

$

146.9

 

 

$

207.6

 

 

$

44.8

 

 

$

399.3

 

Adjustment to the acquired fair values

 

 

(3.1

)

 

 

—

 

 

 

—

 

 

 

(3.1

)

Exchange effect

 

 

(13.7

)

 

 

(0.1

)

 

 

0.1

 

 

 

(13.7

)

At December 31, 2024

 

 

 

 

 

 

 

 

 

 

 

 

Gross cost

 

$

130.1

 

 

$

207.5

 

 

$

44.9

 

 

$

382.5

 

Accumulated impairment losses

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

Net book amount

 

$

130.1

 

 

$

207.5

 

 

$

44.9

 

 

$

382.5

 

Additions

 

 

—

 

 

 

—

 

 

 

2.0

 

 

 

2.0

 

Exchange effect

 

 

14.4

 

 

 

0.2

 

 

 

(0.1

)

 

 

14.5

 

At December 31, 2025

 

 

 

 

 

 

 

 

 

 

 

 

Gross cost

 

$

144.5

 

 

$

207.7

 

 

$

46.8

 

 

$

399.0

 

Accumulated impairment losses

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

Net book amount

 

$

144.5

 

 

$

207.7

 

 

$

46.8

 

 

$

399.0