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Fair Value Measurements (Schedule Of Fair Value, Assets And Liabilities Measured On Recurring Basis) (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Assets, Net, Current $ 86 $ 108
Risk Management Assets, Net, Long-term 4 0
Risk Management Liabilities, Net, Current 2 107
Risk Management 13 21
Commodity Derivatives [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Assets, Net, Current $ 86 $ 110
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration] Risk Management Assets, Net, Current Risk Management Assets, Net, Current
Risk Management Assets, Net, Long-term $ 4  
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration] Risk Management Assets, Net, Long-term  
Risk Management Liabilities, Net, Current $ 2 $ 20
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration] Risk Management Liabilities, Net, Current Risk Management Liabilities, Net, Current
Risk Management $ 13 $ 21
Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Risk Management Risk Management
Commodity Derivatives [Member] | Other Current Assets [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Assets, Gross assets $ 87 $ 116
Risk Management Assets, Gross Liabilities (1) (6)
Commodity Derivatives [Member] | Other Current Assets [Member] | Level 1 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Assets, Gross assets 0 0
Commodity Derivatives [Member] | Other Current Assets [Member] | Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Assets, Gross assets 87 116
Commodity Derivatives [Member] | Other Current Assets [Member] | Level 3 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Assets, Gross assets 0 0
Commodity Derivatives [Member] | Other Noncurrent Assets [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Assets, Gross assets 4  
Risk Management Assets, Gross Liabilities 0  
Commodity Derivatives [Member] | Other Noncurrent Assets [Member] | Level 1 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Assets, Gross assets 0  
Commodity Derivatives [Member] | Other Noncurrent Assets [Member] | Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Assets, Gross assets 3  
Commodity Derivatives [Member] | Other Noncurrent Assets [Member] | Level 3 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Assets, Gross assets 1  
Commodity Derivatives [Member] | Other Current Liabilities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Liabilities, Gross liabilities 3 26
Risk Management Liabilities, Gross Assets (1) (6)
Commodity Derivatives [Member] | Other Current Liabilities [Member] | Level 1 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Liabilities, Gross liabilities 0 0
Commodity Derivatives [Member] | Other Current Liabilities [Member] | Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Liabilities, Gross liabilities 3 26
Commodity Derivatives [Member] | Other Current Liabilities [Member] | Level 3 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Liabilities, Gross liabilities 0 0
Commodity Derivatives [Member] | Long-term Liabilities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Liabilities, Gross liabilities 13 21
Risk Management Liabilities, Gross Assets 0 0
Commodity Derivatives [Member] | Long-term Liabilities [Member] | Level 1 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Liabilities, Gross liabilities 0 0
Commodity Derivatives [Member] | Long-term Liabilities [Member] | Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Liabilities, Gross liabilities 13 21
Commodity Derivatives [Member] | Long-term Liabilities [Member] | Level 3 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Liabilities, Gross liabilities $ 0 0
Foreign Currency Derivatives [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Assets, Net, Current   $ (2)
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]   Risk Management Assets, Net, Current
Risk Management Liabilities, Net, Current   $ 87
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration]   Risk Management Liabilities, Net, Current
Foreign Currency Derivatives [Member] | Other Current Assets [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Assets, Gross assets   $ 0
Risk Management Assets, Gross Liabilities   (2)
Foreign Currency Derivatives [Member] | Other Current Assets [Member] | Level 1 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Assets, Gross assets   0
Foreign Currency Derivatives [Member] | Other Current Assets [Member] | Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Assets, Gross assets   0
Foreign Currency Derivatives [Member] | Other Current Assets [Member] | Level 3 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Assets, Gross assets   0
Foreign Currency Derivatives [Member] | Other Current Liabilities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Liabilities, Gross liabilities   89
Risk Management Liabilities, Gross Assets   (2)
Foreign Currency Derivatives [Member] | Other Current Liabilities [Member] | Level 1 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Liabilities, Gross liabilities   0
Foreign Currency Derivatives [Member] | Other Current Liabilities [Member] | Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Liabilities, Gross liabilities   89
Foreign Currency Derivatives [Member] | Other Current Liabilities [Member] | Level 3 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Liabilities, Gross liabilities   $ 0