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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, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Impact of derivative activities recognized in earnings        
Net loss from commodity derivative activity $ (35) $ (5) $ (38) $ (34)
Product sales revenues        
Impact of derivative activities recognized in earnings        
Net loss from commodity derivative activity (40) 0 (41) (28)
Field operating costs        
Impact of derivative activities recognized in earnings        
Net loss from commodity derivative activity $ 5 $ (5) $ 3 $ (6)