v3.25.4
Derivative Instruments - Balance Sheet Classification (Details)
€ in Millions, $ / BTU in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2025
USD ($)
$ / BTU
Dec. 31, 2024
USD ($)
$ / BTU
Dec. 31, 2023
USD ($)
Dec. 31, 2025
EUR (€)
Dec. 31, 2024
EUR (€)
Dec. 31, 2023
EUR (€)
Derivatives, Fair Value            
Total asset derivatives $ 14 $ 17        
Total liability derivatives 287 114        
Current derivative asset 14 17        
Current derivative liability $ 71 $ 12        
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration] Other Liabilities, Current Other Liabilities, Current   Other Liabilities, Current Other Liabilities, Current  
Noncurrent derivative liability $ 216 $ 102        
Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Other Liabilities, Noncurrent Other Liabilities, Noncurrent   Other Liabilities, Noncurrent Other Liabilities, Noncurrent  
Derivatives designated as hedging instruments            
Derivatives, Fair Value            
Total asset derivatives $ 12 $ 15        
Total liability derivatives $ 287 $ 104        
Derivatives designated as hedging instruments | Commodity forward contracts and collars            
Derivatives, Fair Value            
British Thermal Units ("BTUs") | $ / BTU 9 28        
Total liability derivatives $ 2 $ 6        
Derivatives designated as hedging instruments | Foreign exchange risk            
Derivatives, Fair Value            
Notional amount 400 816        
Total asset derivatives 1 8        
Total liability derivatives 78 69        
Derivatives designated as hedging instruments | Interest rate swaps - fair value hedges            
Derivatives, Fair Value            
Payments for derivative instruments, financing activities     $ 40      
Notional amount | €           € 725
Derivatives not designated as hedging instruments | Foreign exchange contracts            
Derivatives, Fair Value            
Notional amount 526 680        
Total asset derivatives 2 2        
Total liability derivatives   10        
Net investment hedges            
Derivatives, Fair Value            
Payments for derivative instruments, financing activities 6          
Net investment hedges | Derivatives designated as hedging instruments            
Derivatives, Fair Value            
Notional amount | €       € 1,176 € 483  
Total asset derivatives 11 7        
Total liability derivatives $ 207 $ 29