v3.26.1
Property, Plant, and Equipment (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Long-Lived Asset, Held-for-Sale [Line Items]      
Inventories $ 3,422.9   $ 3,363.0
Impairment of Long-Lived Assets to be Disposed of 232.6 $ 0.0  
Asset retirement obligations 2,288.5   2,330.6
Deferred Proceeds from Sale of Assets 10.0    
Proceeds from Sale of Property, Plant, and Equipment 31.4 $ 5.8  
Long-Lived Asset, Held-for-Sale, Fair Value Disclosure 5.0    
Patrocinio      
Long-Lived Asset, Held-for-Sale [Line Items]      
Accelerated Depreciation 26.0    
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    
Carlsbad      
Long-Lived Asset, Held-for-Sale [Line Items]      
Impairment of Long-Lived Assets to be Disposed of 233.0    
Proceeds from Sale of Property, Plant, and Equipment 2.0    
Proceeds from the sale of an asset 20.0    
Araxa and Carlsbad      
Long-Lived Asset, Held-for-Sale [Line Items]      
Accounts and Other Receivables, Net, Current 4.5   15.7
Inventories 44.8   44.5
Other Assets 9.7   14.2
Public Utilities, Property, Plant and Equipment, Net 517.8   184.1
Impairment of Long-Lived Assets to be Disposed of (417.6)   (185.0)
Disposal Group, Including Discontinued Operation, Assets, Current 159.2   73.5
Accounts Payable and Accrued Liabilities, Current 28.6   14.3
Deferred Tax and Other Liabilities, Noncurrent 20.2   20.2
Asset retirement obligations 85.4   20.8
Disposal Group, Including Discontinued Operation, Liabilities, Current $ 134.2   $ 55.3