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Goodwill - Summary of Goodwill (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Goodwill [Line Items]    
Gross cost, beginning balance $ 399.3 $ 358.8
Accumulated impairment losses, beginning balance 0.0 0.0
Net book amount, beginning balance 399.3 358.8
Additions   37.4
Adjustment to the acquired fair values (3.1)  
Exchange effect (13.7) 3.1
Gross cost, ending balance 382.5 399.3
Accumulated impairment losses, ending balance 0.0 0.0
Net book amount, ending balance 382.5 399.3
Performance Chemicals [Member]    
Goodwill [Line Items]    
Gross cost, beginning balance 146.9 106.5
Accumulated impairment losses, beginning balance 0.0 0.0
Net book amount, beginning balance 146.9 106.5
Additions   37.4
Adjustment to the acquired fair values (3.1)  
Exchange effect (13.7) 3.0
Gross cost, ending balance 130.1 146.9
Accumulated impairment losses, ending balance 0.0 0.0
Net book amount, ending balance 130.1 146.9
Fuel Specialties [Member]    
Goodwill [Line Items]    
Gross cost, beginning balance 207.6 207.5
Accumulated impairment losses, beginning balance 0.0 0.0
Net book amount, beginning balance 207.6 207.5
Additions   0.0
Adjustment to the acquired fair values 0.0  
Exchange effect (0.1) 0.1
Gross cost, ending balance 207.5 207.6
Accumulated impairment losses, ending balance 0.0 0.0
Net book amount, ending balance 207.5 207.6
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
Adjustment to the acquired fair values 0.0  
Exchange effect 0.1 0.0
Gross cost, ending balance 44.9 44.8
Accumulated impairment losses, ending balance 0.0 0.0
Net book amount, ending balance $ 44.9 $ 44.8