Derivatives and Risk Management Activities - Fair Value (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2024
Level 3
Rollforward of Level 3 Net Asset/(Liability)
Beginning Balance	$ (189)
Gain for the period included in earnings	$ 58
Net gains/(losses) for the period included in earnings [Extensible Enumeration]	Revenues
Settlements	$ 131
Ending Balance	0
Change in unrealized gains/(losses) included in earnings relating to Level 3 derivatives still held at the end of the period	$ 0
Change in unrealized gains/(losses) included in earnings relating to Level 3 derivatives still held at the end of the period [Extensible Enumeration]	Other income/(expense), net
Recurring Fair Value Measures
Recurring Fair Value Measurements
Total net derivative asset/(liability)	$ 55	$ (49)
Recurring Fair Value Measures \| Commodity derivatives
Recurring Fair Value Measurements
Total net derivative asset/(liability)		(76)
Recurring Fair Value Measures \| Interest rate derivatives
Recurring Fair Value Measurements
Total net derivative asset/(liability)	55	27
Recurring Fair Value Measures \| Level 1
Recurring Fair Value Measurements
Total net derivative asset/(liability)	9	14
Recurring Fair Value Measures \| Level 1 \| Commodity derivatives
Recurring Fair Value Measurements
Total net derivative asset/(liability)	9	14
Recurring Fair Value Measures \| Level 2
Recurring Fair Value Measurements
Total net derivative asset/(liability)	46	(63)
Recurring Fair Value Measures \| Level 2 \| Commodity derivatives
Recurring Fair Value Measurements
Total net derivative asset/(liability)	(9)	(90)
Recurring Fair Value Measures \| Level 2 \| Interest rate derivatives
Recurring Fair Value Measurements
Total net derivative asset/(liability)	$ 55	$ 27

Fair value of the assets less the liabilities of a derivative or group of derivatives.

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Amount of unrealized gain (loss) recognized in income for derivative asset (liability) after deduction of derivative liability (asset), measured at fair value using unobservable input (level 3) and still held.

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Fair value of financial instrument classified as derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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