v3.26.1
Fair Value Measurements (Schedule Of Fair Value, Assets And Liabilities Measured On Recurring Basis) (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Assets, Net, Current $ 226 $ 86
Risk Management Assets, Net, Long-term 180 4
Risk Management Liabilities, Net, Current 241 2
Risk Management 0 13
Commodity Derivatives [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Risk Management Assets, Net, Current $ 226 $ 86
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 $ 180 $ 4
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration] Risk Management Assets, Net, Long-term Risk Management Assets, Net, Long-term
Risk Management Liabilities, Net, Current $ 241 $ 2
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration] Risk Management Liabilities, Net, Current Risk Management Liabilities, Net, Current
Risk Management   $ 13
Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]   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 $ 263 $ 87
Risk Management Assets, Gross Liabilities (37) (1)
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 263 87
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 180 4
Risk Management Assets, Gross Liabilities 0 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 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 153 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 27 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 278 3
Risk Management Liabilities, Gross Assets (37) (1)
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 5 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 273 3
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
Risk Management Liabilities, Gross Assets   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
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
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