Segment Reporting - Segment Reporting (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Segment Reporting Information [Line Items]
Net sales	$ 509.6	$ 472.4
Operating income/(loss)	41.0	44.3
Operating Segments [Member] | Performance Chemicals [Member]
Segment Reporting Information [Line Items]
Net sales	151.4	167.1
Operating income/(loss)	10.4	25.3
Operating Segments [Member] | Fuel Specialties [Member]
Segment Reporting Information [Line Items]
Net sales	190.3	191.8
Operating income/(loss)	32.4	35.5
Operating Segments [Member] | Oilfield Services [Member]
Segment Reporting Information [Line Items]
Net sales	167.9	113.5
Operating income/(loss)	15.9	2.5
Operating Segments [Member] | Personal Care [Member] | Performance Chemicals [Member]
Segment Reporting Information [Line Items]
Net sales	88.2	103.4
Operating Segments [Member] | Home Care [Member] | Performance Chemicals [Member]
Segment Reporting Information [Line Items]
Net sales	23.7	24.4
Operating Segments [Member] | Other [Member] | Performance Chemicals [Member]
Segment Reporting Information [Line Items]
Net sales	39.5	39.3
Operating Segments [Member] | Refinery and Performance [Member] | Fuel Specialties [Member]
Segment Reporting Information [Line Items]
Net sales	149.5	148.4
Operating Segments [Member] | Other [Member] | Fuel Specialties [Member]
Segment Reporting Information [Line Items]
Net sales	40.8	43.4
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Corporate costs	$ (17.7)	$ (19.0)