Derivative Instruments - Effect of Derivative Instruments on the Condensed Consolidated Statement of Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Effect of derivative instruments on the Consolidated Balance Sheet
Total	$ 232	$ (16)	$ 120	$ (16)
Oil contracts
Effect of derivative instruments on the Consolidated Balance Sheet
Cash received (paid) on settlement of derivative instruments	17	0	12	(1)
Unrealized Gain (Loss) on Derivatives	83	(2)	88	(35)
Gas contracts
Effect of derivative instruments on the Consolidated Balance Sheet
Cash received (paid) on settlement of derivative instruments	18	36	1	63
Unrealized Gain (Loss) on Derivatives	$ 114	$ (50)	$ 19	$ (43)