Risk Management Activities - Schedule of Derivative Instruments in Statement of Financial Position, Fair Value (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Derivatives, Fair Value [Line Items]
Crude oil, NGLs and natural gas financial derivative contracts - Current Portion	$ 17	$ 116
Price Risk Derivative
Derivatives, Fair Value [Line Items]
Crude oil, NGLs and natural gas financial derivative contracts - Current Portion	19	0
Crude oil, NGLs and natural gas financial derivative contracts - Current Portion	17	116
Crude oil, NGLs and natural gas financial derivative contracts - Noncurrent Portion	21	0
Derivative asset, fair value, gross asset	19
Derivative liability, fair value, gross liability	20	117
Derivative liability asset offset	3	1
Other Contract
Derivatives, Fair Value [Line Items]
Brent Linked Gas Sales Contract - Noncurrent Portion	$ 65	$ 110

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