Goodwill (Tables)

12 Months Ended

Dec. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Goodwill

The following table analyzes goodwill movement for 2021 and 2020.

(in millions)	Fuel Specialties			Performance Chemicals			Oilfield Services		Octane Additives			Total
At December 31, 2019
Gross cost (1)	$	207.7		$	110.5		$	44.8	$	236.5		$	599.5
Accumulated impairment losses		—			—			—		(236.5	)		(236.5	)
Net book amount	$	207.7		$	110.5		$	44.8	$	—		$	363.0
Exchange effect		0.2			8.0			—		—			8.2
At December 31, 2020
Gross cost (1)	$	207.9		$	118.5		$	44.8	$	—		$	371.2
Accumulated impairment losses		—			—			—		—			—
Net book amount	$	207.9		$	118.5		$	44.8	$	—		$	371.2
Exchange effect		(0.3	)		(6.6	)		—		—			(6.9	)
At December 31, 2021
Gross cost (1)	$	207.6		$	111.9		$	44.8	$	—		$	364.3
Accumulated impairment losses		—			—			—		—			—
Net book amount	$	207.6		$	111.9		$	44.8	$	—		$	364.3

(1) Gross cost is net of $8.7 million, $0.3 million and $289.5 million of historical accumulated amortization in respect of the Fuel Specialties, Performance Chemicals and Octane Additives reporting segments, respectively.