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Segment Reporting - Segment Reporting (Detail) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Segment Reporting Information [Line Items]    
Net sales $ 500.2 $ 509.6
Adjustment to fair value of contingent consideration (0.8) 0.0
Profit on disposal of property, plant and equipment 0.1 0.0
Operating income/(loss) 50.5 41.0
Operating Segments [Member]    
Segment Reporting Information [Line Items]    
Adjustment to fair value of contingent consideration (0.8) 0.0
Profit on disposal of property, plant and equipment 0.1 0.0
Operating Segments [Member] | Performance Chemicals [Member]    
Segment Reporting Information [Line Items]    
Net sales 160.8 151.4
Operating income/(loss) 21.1 10.4
Operating Segments [Member] | Fuel Specialties [Member]    
Segment Reporting Information [Line Items]    
Net sales 176.9 190.3
Operating income/(loss) 33.4 32.4
Operating Segments [Member] | Oilfield Services [Member]    
Segment Reporting Information [Line Items]    
Net sales 162.5 167.9
Operating income/(loss) 16.9 15.9
Operating Segments [Member] | Personal Care [Member] | Performance Chemicals [Member]    
Segment Reporting Information [Line Items]    
Net sales 94.8 88.2
Operating Segments [Member] | Home Care [Member] | Performance Chemicals [Member]    
Segment Reporting Information [Line Items]    
Net sales 26.4 23.7
Operating Segments [Member] | Other [Member] | Performance Chemicals [Member]    
Segment Reporting Information [Line Items]    
Net sales 39.6 39.5
Operating Segments [Member] | Refinery and Performance [Member] | Fuel Specialties [Member]    
Segment Reporting Information [Line Items]    
Net sales 145.1 149.5
Operating Segments [Member] | Other [Member] | Fuel Specialties [Member]    
Segment Reporting Information [Line Items]    
Net sales 31.8 40.8
Corporate, Non-Segment [Member]    
Segment Reporting Information [Line Items]    
Corporate costs $ (20.2) $ (17.7)