Goodwill - Summary of Goodwill (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Line Items]
Gross cost, beginning balance	$ 358.8	$ 364.3
Accumulated impairment losses, beginning balance	0.0	0.0
Net book amount, beginning balance	358.8	364.3
Additions	37.4
Exchange effect	3.1	(5.5)
Gross cost, ending balance	399.3	358.8
Accumulated impairment losses, ending balance	0.0	0.0
Net book amount, ending balance	399.3	358.8
Performance Chemicals [Member]
Goodwill [Line Items]
Gross cost, beginning balance	106.5	111.9
Accumulated impairment losses, beginning balance	0.0	0.0
Net book amount, beginning balance	106.5	111.9
Additions	37.4
Exchange effect	3.0	(5.4)
Gross cost, ending balance	146.9	106.5
Accumulated impairment losses, ending balance	0.0	0.0
Net book amount, ending balance	146.9	106.5
Fuel Specialties [Member]
Goodwill [Line Items]
Gross cost, beginning balance	207.5	207.6
Accumulated impairment losses, beginning balance	0.0	0.0
Net book amount, beginning balance	207.5	207.6
Additions	0.0
Exchange effect	0.1	(0.1)
Gross cost, ending balance	207.6	207.5
Accumulated impairment losses, ending balance	0.0	0.0
Net book amount, ending balance	207.6	207.5
Oilfield Services [Member]
Goodwill [Line Items]
Gross cost, beginning balance	44.8	44.8
Accumulated impairment losses, beginning balance	0.0	0.0
Net book amount, beginning balance	44.8	44.8
Additions	0.0
Exchange effect	0.0	0.0
Gross cost, ending balance	44.8	44.8
Accumulated impairment losses, ending balance	0.0	0.0
Net book amount, ending balance	$ 44.8	$ 44.8