REDEMABLE NONCONTROLLING INTEREST - ALTUS REDEMABLE NONCONTROLLING INTEREST - ALTUS - Activity Related to Preferred Units (Details) - USD ($) $ in Millions		12 Months Ended
	Feb. 14, 2020	Dec. 31, 2019	Jun. 12, 2019
Increase (Decrease) in Temporary Equity [Roll Forward]
Beginning balance		$ 0
Ending balance		555
Redeemable Noncontrolling Interest - Altus Preferred Unit Limited Partners
Increase (Decrease) in Temporary Equity [Roll Forward]
Issuance of Altus Preferred Units		517
Altus Midstream LP
Increase (Decrease) in Temporary Equity [Roll Forward]
Embedded derivative liability		103	$ 94
Redeemable noncontrolling interest, net of embedded derivative liability		658
Preferred Units, redemption price		$ 664
Preferred Units, redemption terms, internal rate of return		11.50%
Altus Midstream LP | Redeemable Noncontrolling Interest - Altus Preferred Unit Limited Partners
Movement In Preferred Units [Roll Forward]
1 Preferred Units: beginning of period (in shares)		0
Issuance of Preferred Units, net (in shares)		625,000
Distribution of in-kind additional Preferred Units (in shares)		13,163
Preferred Units: end of period (in shares)		638,163
Increase (Decrease) in Temporary Equity [Roll Forward]
Beginning balance		$ 0
Issuance of Altus Preferred Units		517
Distribution of in-kind additional Preferred Units		0
Allocation of Altus Midstream LP net income		38
Ending balance		$ 555
Embedded derivative liability			$ 94
Preferred Units, redemption terms, internal rate of return		11.50%
Scenario, Forecast | Altus Midstream LP
Increase (Decrease) in Temporary Equity [Roll Forward]
Preferred Units, distribution in-kind	$ 11
Preferred Units, distribution, PIK units (in shares)	11,168