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Segment Reporting - Segment Reporting (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Segment Reporting Information [Line Items]        
Net sales $ 480.4 $ 467.6 $ 990.0 $ 940.0
Operating income/(loss) 34.2 46.3 75.2 90.6
Operating Segments [Member] | Performance Chemicals [Member]        
Segment Reporting Information [Line Items]        
Net sales 127.8 169.0 279.2 336.1
Operating income/(loss) 9.2 28.8 19.6 54.1
Operating Segments [Member] | Fuel Specialties [Member]        
Segment Reporting Information [Line Items]        
Net sales 154.2 176.4 344.5 368.2
Operating income/(loss) 17.1 31.5 49.5 67.0
Operating Segments [Member] | Oilfield Services [Member]        
Segment Reporting Information [Line Items]        
Net sales 198.4 122.2 366.3 235.7
Operating income/(loss) 28.0 4.5 43.9 7.0
Operating Segments [Member] | Personal Care [Member] | Performance Chemicals [Member]        
Segment Reporting Information [Line Items]        
Net sales 78.6 105.3 166.8 208.7
Operating Segments [Member] | Home Care [Member] | Performance Chemicals [Member]        
Segment Reporting Information [Line Items]        
Net sales 19.7 25.3 43.4 49.7
Operating Segments [Member] | Other [Member] | Performance Chemicals [Member]        
Segment Reporting Information [Line Items]        
Net sales 29.5 38.4 69.0 77.7
Operating Segments [Member] | Refinery and Performance [Member] | Fuel Specialties [Member]        
Segment Reporting Information [Line Items]        
Net sales 119.1 123.9 268.6 272.3
Operating Segments [Member] | Other [Member] | Fuel Specialties [Member]        
Segment Reporting Information [Line Items]        
Net sales 35.1 52.5 75.9 95.9
Corporate, Non-Segment [Member]        
Segment Reporting Information [Line Items]        
Corporate costs $ (20.1) $ (18.5) $ (37.8) $ (37.5)