v3.26.1
Commitments and Contingencies (Summary of Estimated Loss from Hurricane) (Detail) - Loss from Catastrophes - 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]      
Loss from natural disaster, net of insurance recoveries $ 0.0 $ 0.0  
Insurance recoveries to be received 0.2 0.8  
Movement in Loss Contingency Receivable, Increase (Decrease) [Roll Forward]      
Loss from natural disaster, net of insurance recoveries 0.0 0.0  
Loss Contingency Accrual, Period Increase (Decrease) 0.2 5.8 $ 29.1
Insurance proceeds for lost profits 4.0 4.0  
Site clean-up and remediation costs      
Movement in Loss Contingency Receivable, Increase (Decrease) [Roll Forward]      
Loss Contingency Accrual, Period Increase (Decrease) 0.1 4.7  
Impairment and Repairs of property, plant and equipment      
Movement in Loss Contingency Receivable, Increase (Decrease) [Roll Forward]      
Loss Contingency Accrual, Period Increase (Decrease) 0.1 0.8  
Impairment and rework of inventory      
Movement in Loss Contingency Receivable, Increase (Decrease) [Roll Forward]      
Loss Contingency Accrual, Period Increase (Decrease) 0.0 0.1  
Other      
Movement in Loss Contingency Receivable, Increase (Decrease) [Roll Forward]      
Loss Contingency Accrual, Period Increase (Decrease) $ 0.0 $ 0.2