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Other Financial Statement Data (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Receivables, Net, Current [Abstract]      
Trade $ 969.1 $ 940.9  
Accounts Receivable, before Allowance for Credit Loss, Related Party, Current 67.1 194.6  
Non-trade 78.1 134.4  
Accounts Receivable, before Allowance for Credit Loss 1,114.3 1,269.9  
Less: Allowance for doubtful accounts 1.0 0.7  
Current receivables, net 1,113.3 1,269.2  
Inventories      
Raw materials 148.6 135.8  
Work in process 941.1 964.8  
Finished goods 1,239.8 1,178.0  
Deferred Costs [1] 53.5 61.5  
Operating materials and supplies 165.4 183.1  
Inventory, net 2,548.4 2,523.2  
Other current assets      
Income and other taxes receivable 234.9 269.3  
Prepaid expenses 299.8 284.3  
Other 29.1 50.2  
Total other current assets 563.8 603.8  
Other Assets      
Restricted cash 17.3 3.4 $ 10.5
MRO inventory 169.0 166.3  
Debt Securities, Available-for-sale, Restricted 708.7 708.6  
Operating Lease, Right-of-Use Asset $ 220.0 $ 229.8  
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Other Assets, Noncurrent Other Assets, Noncurrent  
Indemnification asset $ 18.4 $ 20.9  
Long-term receivable 12.9 21.8  
Cloud computing asset [2] 166.3 138.9  
Other 207.7 285.9  
Other Assets, Noncurrent 1,520.3 1,575.6  
Accrued liabilities      
Accrued dividends 74.1 72.3  
Payroll and employee benefits 161.8 182.6  
Asset retirement obligations 352.8 377.4  
Customer prepayments 270.7 261.8  
Accrued Income Taxes 204.7 190.0  
Operating Lease, Liability, Current 43.9 65.3  
Other 612.1 627.7  
Total accrued liabilities, current 1,720.1 1,777.1  
Other noncurrent liabilities      
Asset retirement obligations 2,219.4 1,836.0  
Operating Lease, Liability, Noncurrent 181.2 168.1  
Accrued pension and postretirement benefits 91.6 119.7  
Unrecognized tax benefits 17.7 30.5  
Other 353.0 274.9  
Total other noncurrent liabilities 2,862.9 2,429.2  
Interest expense, net was comprised of the following:      
Interest income 47.2 59.6 31.0
Less interest expense 230.0 189.0 168.8
Interest expense, net $ (182.8) $ (129.4) $ (137.8)
[1] Final price deferred is product that has shipped to customers, but we retain control and do not recognize revenue until a sales contract has been agreed to with the customer.
[2]
(b)Implementation costs eligible for capitalization related to cloud computing arrangements that are a service contract are recorded within Prepaid expenses and Other assets in the Consolidated Balance Sheets and amortized over the reasonably certain term of the associated hosting arrangement.