Derivatives and Risk Management Activities - Financial Impact (Details) - Commodity Derivatives - Derivatives Not Designated as a Hedge - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Impact of derivative activities recognized in earnings
Net gain/(loss) from commodity derivative activity	$ 20	$ (159)	$ (230)	$ (54)
Product sales revenues
Impact of derivative activities recognized in earnings
Net gain/(loss) from commodity derivative activity	29	(142)	(195)	(24)
Field operating costs
Impact of derivative activities recognized in earnings
Net gain/(loss) from commodity derivative activity	$ (9)	$ (17)	$ (35)	$ (30)