EQUITY METHOD INTERESTS - Rollforward Activity (Details) $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($)
Movement In Equity Method Interests [Roll Forward]
Equity method interest, beginning balance	$ 1,365	[1]
Equity method interest, ending balance	618	[1]
ALTM
Movement In Equity Method Interests [Roll Forward]
Equity method interest, beginning balance	1,365
Capital contributions	2
Distributions	(21)
Equity income (loss), net	21
Deconsolidation of Altus	(1,367)
Equity method interest, ending balance	0
Gulf Coast Express Pipeline LLC | ALTM
Movement In Equity Method Interests [Roll Forward]
Equity method interest, beginning balance	274
Capital contributions	0
Distributions	(5)
Equity income (loss), net	8
Deconsolidation of Altus	(277)
Equity method interest, ending balance	0
EPIC Crude Holdings, LP | ALTM
Movement In Equity Method Interests [Roll Forward]
Equity method interest, beginning balance	0
Capital contributions	2
Distributions	0
Equity income (loss), net	(2)
Deconsolidation of Altus	0
Equity method interest, ending balance	0
Permian Highway Pipeline LLC | ALTM
Movement In Equity Method Interests [Roll Forward]
Equity method interest, beginning balance	630
Capital contributions	0
Distributions	(9)
Equity income (loss), net	10
Deconsolidation of Altus	(631)
Equity method interest, ending balance	0
Breviloba, LLC | ALTM
Movement In Equity Method Interests [Roll Forward]
Equity method interest, beginning balance	461
Capital contributions	0
Distributions	(7)
Equity income (loss), net	5
Deconsolidation of Altus	(459)
Equity method interest, ending balance	$ 0

[1] The Altus VIE amounts are disclosed as of December 31, 2021. All Altus balances were deconsolidated as of February 22, 2022. Refer to Note 1—Summary of Significant Accounting Policies and Note 2—Acquisitions and Divestitures for further detail.