v3.25.2
Environmental Matters - Company's Liability for Environmental Obligations (Detail) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Environmental Exit Cost [Line Items]      
Total Balance at Beginning of Period $ 7.8 $ 4.6  
Additions 0.3 0.2  
Less: Payments / Reductions 0.3 0.1  
Total Balance at End of Period 7.8 4.7  
Less: Current Portion 0.7 0.7 $ 0.7
Noncurrent Balance at End of Period $ 7.1 $ 4.0 $ 7.1