v3.26.3
Environmental Obligations - Schedule of Environmental Reserve Rollforward and Recoveries and Provisions (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Accrual for Environmental Loss Contingencies [Roll Forward]          
Environmental reserves, long-term $ 566.0   $ 566.0   $ 600.4
Recorded Recoveries [Roll Forward]          
Beginning balance     6.6    
Increase (Decrease) in recoveries     0.7    
Cash received     (0.7)    
Ending balance 6.6   6.6    
Environmental charges, net 3.8 $ 4.9 13.1 $ 15.8  
Environmental provision, net 27.8 8.5 42.6 26.0  
Continuing Operations          
Recorded Recoveries [Roll Forward]          
Environmental charges, net 3.8 4.9 13.1 15.8  
Discontinued Operations          
Recorded Recoveries [Roll Forward]          
Environmental charges, net 24.0 3.6 29.5 10.2  
Location, Statement of Financial Position, Activity, Capitalization [Axis]: us-gaap:OtherAssetsNoncurrent          
Recorded Recoveries [Roll Forward]          
Environmental provision, net (0.2) (0.1) (0.7) (0.4)  
Location, Statement of Financial Position, Activity, Accrual [Axis]: us-gaap:OtherLiabilitiesNoncurrent          
Recorded Recoveries [Roll Forward]          
Environmental provision, net 28.0 $ 8.6 43.3 $ 26.4  
Gross          
Accrual for Environmental Loss Contingencies [Roll Forward]          
Total environmental reserves, beginning of period     705.7    
Provision (Benefit)     43.8    
(Spending) Recoveries     (53.5)    
Foreign currency translation adjustments     (4.3)    
Net change     (14.0)    
Total environmental reserves, end of period 691.7   691.7    
Environmental reserves, current 113.5   113.5    
Environmental reserves, long-term 578.2   578.2    
Total environmental reserves 691.7   691.7   705.7
Recoveries          
Accrual for Environmental Loss Contingencies [Roll Forward]          
Total environmental reserves, beginning of period     13.0    
Provision (Benefit)     (0.6)    
(Spending) Recoveries     1.0    
Foreign currency translation adjustments     0.0    
Net change     0.4    
Total environmental reserves, end of period 12.6   12.6    
Environmental reserves, current 0.4   0.4    
Environmental reserves, long-term 12.2   12.2    
Total environmental reserves 12.6   12.6   13.0
Net          
Accrual for Environmental Loss Contingencies [Roll Forward]          
Total environmental reserves, beginning of period     692.7    
Provision (Benefit)     43.2    
(Spending) Recoveries     (52.5)    
Foreign currency translation adjustments     (4.3)    
Net change     (13.6)    
Total environmental reserves, end of period 679.1   679.1    
Environmental reserves, current 113.1   113.1    
Environmental reserves, long-term 566.0   566.0    
Total environmental reserves $ 679.1   $ 679.1   $ 692.7