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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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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Derivatives and Risk Management Activities - Fair Value (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Level 3
Rollforward of Level 3 Net Asset/(Liability)
Beginning Balance	$ (2)	$ (29)
Net losses for the period included in earnings	(44)	(67)
Settlements	2	4
Ending Balance	(44)	(92)
Change in unrealized losses included in earnings relating to Level 3 derivatives still held at the end of the period	(44)	$ (67)
Recurring Fair Value Measures
Recurring Fair Value Measurements
Total net derivative asset/(liability)	(96)		$ (78)
Recurring Fair Value Measures \| Commodity derivatives
Recurring Fair Value Measurements
Total net derivative asset/(liability)	(149)		(143)
Recurring Fair Value Measures \| Interest rate derivatives
Recurring Fair Value Measurements
Total net derivative asset/(liability)	97		65
Recurring Fair Value Measures \| Preferred Distribution Rate Reset Option and Other
Recurring Fair Value Measurements
Total net derivative asset/(liability)	(44)		0
Recurring Fair Value Measures \| Level 1
Recurring Fair Value Measurements
Total net derivative asset/(liability)	(76)		(17)
Recurring Fair Value Measures \| Level 1 \| Commodity derivatives
Recurring Fair Value Measurements
Total net derivative asset/(liability)	(76)		(17)
Recurring Fair Value Measures \| Level 1 \| Interest rate derivatives
Recurring Fair Value Measurements
Total net derivative asset/(liability)	0		0
Recurring Fair Value Measures \| Level 1 \| Preferred Distribution Rate Reset Option and Other
Recurring Fair Value Measurements
Total net derivative asset/(liability)	0		0
Recurring Fair Value Measures \| Level 2
Recurring Fair Value Measurements
Total net derivative asset/(liability)	24		(59)
Recurring Fair Value Measures \| Level 2 \| Commodity derivatives
Recurring Fair Value Measurements
Total net derivative asset/(liability)	(73)		(124)
Recurring Fair Value Measures \| Level 2 \| Interest rate derivatives
Recurring Fair Value Measurements
Total net derivative asset/(liability)	97		65
Recurring Fair Value Measures \| Level 2 \| Preferred Distribution Rate Reset Option and Other
Recurring Fair Value Measurements
Total net derivative asset/(liability)	0		0
Recurring Fair Value Measures \| Level 3
Recurring Fair Value Measurements
Total net derivative asset/(liability)	(44)		(2)
Recurring Fair Value Measures \| Level 3 \| Commodity derivatives
Recurring Fair Value Measurements
Total net derivative asset/(liability)	0		(2)
Recurring Fair Value Measures \| Level 3 \| Interest rate derivatives
Recurring Fair Value Measurements
Total net derivative asset/(liability)	0		0
Recurring Fair Value Measures \| Level 3 \| Preferred Distribution Rate Reset Option and Other
Recurring Fair Value Measurements
Total net derivative asset/(liability)	$ (44)		$ 0