REVENUE FROM CONTRACTS WITH CUSTOMERS - Revenue from Contracts with Customers (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 6,747	$ 2,756	$ 3,887
Midland Basin
Disaggregation of Revenue [Line Items]
Revenues	4,288	1,587	2,325
Delaware Basin
Disaggregation of Revenue [Line Items]
Revenues	2,127	1,161	1,494
Other
Disaggregation of Revenue [Line Items]
Revenues	332	8	68
Oil sales
Disaggregation of Revenue [Line Items]
Revenues	5,396	2,410	3,554
Oil sales | Midland Basin
Disaggregation of Revenue [Line Items]
Revenues	3,468	1,393	2,139
Oil sales | Delaware Basin
Disaggregation of Revenue [Line Items]
Revenues	1,663	1,011	1,351
Oil sales | Other
Disaggregation of Revenue [Line Items]
Revenues	265	6	64
Natural gas sales
Disaggregation of Revenue [Line Items]
Revenues	569	107	66
Natural gas sales | Midland Basin
Disaggregation of Revenue [Line Items]
Revenues	327	56	32
Natural gas sales | Delaware Basin
Disaggregation of Revenue [Line Items]
Revenues	215	50	33
Natural gas sales | Other
Disaggregation of Revenue [Line Items]
Revenues	27	1	1
Natural gas liquid sales
Disaggregation of Revenue [Line Items]
Revenues	782	239	267
Natural gas liquid sales | Midland Basin
Disaggregation of Revenue [Line Items]
Revenues	493	138	154
Natural gas liquid sales | Delaware Basin
Disaggregation of Revenue [Line Items]
Revenues	249	100	110
Natural gas liquid sales | Other
Disaggregation of Revenue [Line Items]
Revenues	$ 40	$ 1	$ 3