v3.26.1
Assets Held for Sale and Idle Facilities (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Dec. 19, 2025
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Long-Lived Asset, Held-for-Sale [Line Items]              
Inventories   $ 3,668.0   $ 3,363.0 $ 3,668.0   $ 3,363.0
Impairment of Long-Lived Assets to be Disposed of         238.8 $ 0.0  
Asset retirement obligations   2,287.9   2,330.6 2,287.9   2,330.6
Deferred Proceeds from Sale of Assets $ 10.0 10.0     10.0    
Proceeds from Sale of Property, Plant, and Equipment         34.6 $ 5.8  
Patrocinio              
Long-Lived Asset, Held-for-Sale [Line Items]              
Accelerated Depreciation   26.0     52.0    
Operating Expenses     $ 159.0        
Contract Termination Costs     72.0        
Long-Lived Asset, Held and Used, Impairment Loss     56.0        
Inventory Write-down     21.0        
Severance Costs     10.0        
Care and Maintenance Expense   13.0     37.0    
Carlsbad              
Long-Lived Asset, Held-for-Sale [Line Items]              
Public Utilities, Property, Plant and Equipment, Net       184.1     184.1
Impairment of Long-Lived Assets to be Disposed of             185.0
Disposal Group, Including Discontinued Operation, Assets, Current       73.5     73.5
Disposal Group, Including Discontinued Operation, Liabilities, Current       55.3     55.3
Proceeds from Sale of Property, Plant, and Equipment         2.0    
Proceeds from the sale of an asset $ 20.0            
Accounts Receivables, Inventory and Other Assets, Net       74.4     $ 74.4
Replacement Surety Bonds, Amount         82.0    
Guarantor Obligations, Maximum Exposure, Undiscounted   50.0     50.0    
Asset, Impairment Loss   6.2   $ 185.0 191.2    
Araxa              
Long-Lived Asset, Held-for-Sale [Line Items]              
Public Utilities, Property, Plant and Equipment, Net   329.2     329.2    
Impairment of Long-Lived Assets to be Disposed of         (232.6)    
Disposal Group, Including Discontinued Operation, Assets, Current   96.6     96.6    
Accounts Payable and Accrued Liabilities, Current   12.3     12.3    
Asset retirement obligations   64.3     64.3    
Disposal Group, Including Discontinued Operation, Liabilities, Current   76.6     $ 76.6    
Asset, Impairment Loss   $ 0.0 $ 233.0