v3.26.1
Commitments and Contingencies (Narrative) (Detail)
$ in Millions
3 Months Ended 6 Months Ended 10 Months Ended 12 Months Ended
Jun. 30, 2025
USD ($)
Sep. 30, 2014
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2019
USD ($)
component
Jun. 30, 2026
USD ($)
a
Dec. 31, 2025
USD ($)
Loss Contingencies [Line Items]              
Accrued environmental loss contingencies current           $ 8.0 $ 7.8
Loss from Catastrophes              
Loss Contingencies [Line Items]              
Loss from natural disaster, net of insurance recoveries $ 0.0   $ 0.0        
Insurance recoveries received 0.0   5.0 $ 25.0      
Loss Contingency Accrual, Period Increase (Decrease) 0.2   5.8 29.1      
Insurance recoveries received 0.0   5.0 $ 25.0      
Insurance proceeds for lost profits $ 4.0   $ 4.0        
Environmental Claims For A Site In Goodyear Arizona              
Loss Contingencies [Line Items]              
Accrual for environmental loss contingencies, revision in estimates   $ 49.0     $ 18.9    
Number of main remedial components | component         2    
Estimated liability           11.2 12.9
Accrued environmental loss contingencies current           $ 7.8 7.8
Loss contingency reimbursement rate           21.00%  
Other receivables           $ 1.9 $ 2.3
Environmental Claims For Crab Orchard National Wildlife Refuge Superfund Site              
Loss Contingencies [Line Items]              
Approximate size of referenced site | a           55,000