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Segment Reporting and Geographical Area Data - Segment Reporting (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Segment Reporting Information [Line Items]      
Net sales $ 1,963.7 $ 1,483.4 $ 1,193.1
Restructuring charge 0.0 0.0 (21.3)
Impairment of intangible assets 0.0 0.0 (19.8)
Profit on disposal 0.0 1.8 0.0
Operating income/(expense) 187.3 132.1 33.7
Identifiable assets at year end 1,603.7 1,570.9 1,397.4
Oilfield Services [Member]      
Segment Reporting Information [Line Items]      
Net sales 222.2    
Operating Segments [Member] | Fuel Specialties [Member]      
Segment Reporting Information [Line Items]      
Net sales 730.2 618.3 512.7
Operating income/(expense) 121.7 104.6 84.5
Identifiable assets at year end 500.6 571.3 509.7
Operating Segments [Member] | Fuel Specialties [Member] | Refinery and Performance [Member]      
Segment Reporting Information [Line Items]      
Net sales 552.6 445.3 372.9
Operating Segments [Member] | Fuel Specialties [Member] | Other [Member]      
Segment Reporting Information [Line Items]      
Net sales 177.6 173.0 139.8
Operating Segments [Member] | Performance Chemicals [Member]      
Segment Reporting Information [Line Items]      
Net sales 639.7 525.3 425.4
Operating income/(expense) 95.3 70.9 54.8
Identifiable assets at year end 610.4 469.5 391.5
Operating Segments [Member] | Performance Chemicals [Member] | Personal Care [Member]      
Segment Reporting Information [Line Items]      
Net sales 393.3 296.1 231.4
Operating Segments [Member] | Performance Chemicals [Member] | Home Care [Member]      
Segment Reporting Information [Line Items]      
Net sales 94.2 93.0 87.0
Operating Segments [Member] | Performance Chemicals [Member] | Other [Member]      
Segment Reporting Information [Line Items]      
Net sales 152.2 136.2 107.0
Operating Segments [Member] | Oilfield Services [Member]      
Segment Reporting Information [Line Items]      
Net sales 593.8 339.8 255.0
Operating income/(expense) 41.7 10.4 (9.5)
Identifiable assets at year end 297.8 230.8 210.8
Operating Segments [Member] | Octane Additives [Member]      
Segment Reporting Information [Line Items]      
Operating income/(expense) 0.0 0.0 (2.8)
Corporate, Non-Segment [Member]      
Segment Reporting Information [Line Items]      
Corporate costs (71.4) (55.6) (52.2)
Restructuring charge 0.0 0.0 (21.3)
Impairment of intangible assets 0.0 0.0 (19.8)
Profit on disposal 0.0 1.8 0.0
Identifiable assets at year end $ 194.9 $ 299.3 $ 285.4