v3.26.1
Derivatives and Risk Management Activities - Financial Impact (Details) - Derivatives Not Designated as a Hedge - Commodity derivatives - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Impact of derivative activities recognized in earnings        
Net income/(loss) from commodity derivative activity $ 17 $ (35) $ 107 $ (38)
Location, Statement of Income, Balance [Axis]: us-gaap:OperatingCostsAndExpenses        
Impact of derivative activities recognized in earnings        
Net income/(loss) from commodity derivative activity 0 5 2 3
Location, Statement of Income, Balance [Axis]: us-gaap:Revenues        
Impact of derivative activities recognized in earnings        
Net income/(loss) from commodity derivative activity $ 17 $ (40) $ 105 $ (41)