v3.25.2
Commitments and Contingencies (Summary of Estimated Loss from Hurricane) (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 10 Months Ended
Jun. 30, 2025
Jun. 30, 2025
Jun. 30, 2025
Loss Contingencies [Line Items]      
Insurance proceeds for lost profits $ 4.0 $ 4.0  
Loss from Catastrophes      
Loss Contingencies [Line Items]      
Total expenses and losses 0.2 5.8 $ 29.1
Insurance recoveries received 0.0 5.0 25.0
Insurance recoveries to be received 0.2 0.8  
Loss from natural disaster, net of insurance recoveries   0.0  
Movement in Loss Contingency Receivable, Increase (Decrease) [Roll Forward]      
Insurance recoveries receivable, net of deductible, beginning balance   2.8  
Changes in receivables 0.2 0.8  
Insurance recoveries receivable, net of deductible, ending balance 3.6 3.6 $ 3.6
Loss from Catastrophes | Site clean-up and remediation costs      
Loss Contingencies [Line Items]      
Total expenses and losses 0.1 4.7  
Loss from Catastrophes | Repairs of property, plant and equipment      
Loss Contingencies [Line Items]      
Total expenses and losses 0.1 0.8  
Loss from Catastrophes | Impairment and rework of inventory      
Loss Contingencies [Line Items]      
Total expenses and losses 0.0 0.1  
Loss from Catastrophes | Other      
Loss Contingencies [Line Items]      
Total expenses and losses $ 0.0 $ 0.2