Goodwill (Tables)

12 Months Ended

Dec. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Goodwill

The following table analyzes goodwill movement for 2023 and 2022.

(in millions)	Performance Chemicals			Fuel Specialties			Oilfield Services		Total
At December 31, 2021
Gross cost	$	111.9		$	207.6		$	44.8	$	364.3
Accumulated impairment losses		—			—			—		—
Net book amount	$	111.9		$	207.6		$	44.8	$	364.3
Exchange effect		(5.4	)		(0.1	)		—		(5.5	)
At December 31, 2022
Gross cost	$	106.5		$	207.5		$	44.8	$	358.8
Accumulated impairment losses		—			—			—		—
Net book amount	$	106.5		$	207.5		$	44.8	$	358.8
Additions		37.4			—			—		37.4
Exchange effect		3.0			0.1			—		3.1
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