EQUITY METHOD INTERESTS - Summary of Investments (Details) - USD ($) $ in Millions		Jun. 30, 2022	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
Equity method interests	[1]	$ 618	$ 1,365
ALTM
Schedule of Equity Method Investments [Line Items]
Equity method interests		$ 0	1,365
Gulf Coast Express Pipeline, LLC
Schedule of Equity Method Investments [Line Items]
Interest		16.00%
Gulf Coast Express Pipeline, LLC | ALTM
Schedule of Equity Method Investments [Line Items]
Equity method interests		$ 0	274
EPIC Crude Holdings, LP
Schedule of Equity Method Investments [Line Items]
Interest		15.00%
EPIC Crude Holdings, LP | ALTM
Schedule of Equity Method Investments [Line Items]
Equity method interests		$ 0	0
Permian Highway Pipeline, LLC
Schedule of Equity Method Investments [Line Items]
Interest		26.70%
Permian Highway Pipeline, LLC | ALTM
Schedule of Equity Method Investments [Line Items]
Equity method interests		$ 0	630
Shin Oak Pipeline (Breviloba, LLC)
Schedule of Equity Method Investments [Line Items]
Interest		33.00%
Shin Oak Pipeline (Breviloba, LLC) | ALTM
Schedule of Equity Method Investments [Line Items]
Equity method interests		$ 0	$ 461

[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 3—Acquisitions and Divestitures for further detail.