v3.26.1
Environmental Obligations - Schedule of Environmental Reserve Rollforward and Recoveries and Provisions (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Accrual for Environmental Loss Contingencies [Roll Forward]          
Environmental reserves, long-term $ 562.9   $ 562.9   $ 600.4
Recorded Recoveries [Roll Forward]          
Beginning balance     6.6    
Increase (Decrease) in recoveries     0.5    
Cash received     (0.5)    
Ending balance 6.6   6.6    
Environmental charges, net 5.4 $ 7.4 9.3 $ 10.9  
Environmental provision, net 8.1 11.5 14.8 17.5  
Continuing Operations          
Recorded Recoveries [Roll Forward]          
Environmental charges, net 5.4 7.4 9.3 10.9  
Discontinued Operations          
Recorded Recoveries [Roll Forward]          
Environmental charges, net 2.7 4.1 5.5 6.6  
Location, Statement of Financial Position, Activity, Capitalization [Axis]: us-gaap:OtherAssetsNoncurrent          
Recorded Recoveries [Roll Forward]          
Environmental provision, net (0.3) (0.2) (0.5) (0.3)  
Location, Statement of Financial Position, Activity, Accrual [Axis]: us-gaap:OtherLiabilitiesNoncurrent          
Recorded Recoveries [Roll Forward]          
Environmental provision, net 8.4 $ 11.7 15.3 $ 17.8  
Gross          
Accrual for Environmental Loss Contingencies [Roll Forward]          
Total environmental reserves, beginning of period     705.7    
Provision (Benefit)     15.6    
(Spending) Recoveries     (34.7)    
Foreign currency translation adjustments     (3.4)    
Net change     (22.5)    
Total environmental reserves, end of period 683.2   683.2    
Environmental reserves, current 108.2   108.2    
Environmental reserves, long-term 575.0   575.0    
Total environmental reserves 683.2   683.2   705.7
Recoveries          
Accrual for Environmental Loss Contingencies [Roll Forward]          
Total environmental reserves, beginning of period     13.0    
Provision (Benefit)     (0.3)    
(Spending) Recoveries     0.0    
Foreign currency translation adjustments     0.0    
Net change     (0.3)    
Total environmental reserves, end of period 13.3   13.3    
Environmental reserves, current 1.2   1.2    
Environmental reserves, long-term 12.1   12.1    
Total environmental reserves 13.3   13.3   13.0
Net          
Accrual for Environmental Loss Contingencies [Roll Forward]          
Total environmental reserves, beginning of period     692.7    
Provision (Benefit)     15.3    
(Spending) Recoveries     (34.7)    
Foreign currency translation adjustments     (3.4)    
Net change     (22.8)    
Total environmental reserves, end of period 669.9   669.9    
Environmental reserves, current 107.0   107.0    
Environmental reserves, long-term 562.9   562.9    
Total environmental reserves $ 669.9   $ 669.9   $ 692.7