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Derivatives and Risk Management Activities - Fair Value (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Level 3
Rollforward of Level 3 Net Asset/(Liability)
Beginning Balance	$ (147)	$ (189)	$ (2)
Net gains/(losses) for the period included in earnings	(49)	58	(196)
Settlements		131	2
Ending Balance	(196)	0	(196)
Change in unrealized gains/(losses) included in earnings relating to Level 3 derivatives still held at the end of the period	$ (49)		$ (196)
Recurring Fair Value Measures
Recurring Fair Value Measurements
Total net derivative asset/(liability)		117		$ 153
Recurring Fair Value Measures | Commodity derivatives
Recurring Fair Value Measurements
Total net derivative asset/(liability)		37		222
Recurring Fair Value Measures | Interest rate derivatives
Recurring Fair Value Measurements
Total net derivative asset/(liability)		80		120
Recurring Fair Value Measures | Preferred Distribution Rate Reset Option
Recurring Fair Value Measurements
Total net derivative asset/(liability)				(189)
Recurring Fair Value Measures | Level 1
Recurring Fair Value Measurements
Total net derivative asset/(liability)		(1)		(7)
Recurring Fair Value Measures | Level 1 | Commodity derivatives
Recurring Fair Value Measurements
Total net derivative asset/(liability)		(1)		(7)
Recurring Fair Value Measures | Level 2
Recurring Fair Value Measurements
Total net derivative asset/(liability)		118		349
Recurring Fair Value Measures | Level 2 | Commodity derivatives
Recurring Fair Value Measurements
Total net derivative asset/(liability)		38		229
Recurring Fair Value Measures | Level 2 | Interest rate derivatives
Recurring Fair Value Measurements
Total net derivative asset/(liability)		80		120
Recurring Fair Value Measures | Level 3
Recurring Fair Value Measurements
Total net derivative asset/(liability)		$ 0		(189)
Recurring Fair Value Measures | Level 3 | Preferred Distribution Rate Reset Option
Recurring Fair Value Measurements
Total net derivative asset/(liability)				$ (189)

X

- Definition

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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Amount of gain (loss) recognized in income from derivative asset (liability) after deduction of derivative liability (asset), measured at fair value on recurring basis using unobservable input (level 3).

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

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