SUPPLEMENTAL INFORMATION ON OIL AND GAS EXPLORATION AND PRODUCTION ACTIVITIES (UNAUDITED) - Oil and Gas Reserves (Details)	12 Months Ended
	Dec. 31, 2022 bbl	Dec. 31, 2021 bbl	Dec. 31, 2020 bbl	Dec. 31, 2021 Bcf	Dec. 31, 2019 bbl
Proved Developed and Undeveloped Reserves [Roll Forward]
Beginning of the period	3,898,000,000	2,588,000,000	4,528,000,000
Purchases of reserves	0	0	0
Extensions and discoveries	439,000,000	695,000,000	240,000,000
Sales of reserves	0	0	(75,000,000)
Revisions of prior reserve estimates	70,000,000	982,000,000	(1,725,000,000)
Current production	(359,000,000)	(366,000,000)	(380,000,000)
End of period	4,048,000,000	3,898,000,000	2,588,000,000
Proved developed reserves (Volume)	2,295,000,000	2,165,000,000	1,527,000,000		1,984,000,000
Proved undeveloped reserves (Volume)	1,752,000,000	1,733,000,000	1,061,000,000		2,544,000,000
Oil
Proved Developed and Undeveloped Reserves [Roll Forward]
Beginning of the period	16,000,000	13,000,000	18,000,000
Purchases of reserves	0	0	0
Extensions and discoveries	3,000,000	2,000,000	1,000,000
Sales of reserves	0	0	0
Revisions of prior reserve estimates	0	2,000,000	(4,000,000)
Current production	(2,000,000)	(2,000,000)	(2,000,000)
End of period	18,000,000	16,000,000	13,000,000
Proved developed reserves (Volume)	9,000,000	8,000,000	7,000,000		8,000,000
Proved undeveloped reserves (Volume)	9,000,000	8,000,000	7,000,000		10,000,000
Natural Gas
Proved Developed and Undeveloped Reserves [Roll Forward]
Beginning of the period	3,478,000,000	2,281,000,000	4,048,000,000
Purchases of reserves	0	0	0
Extensions and discoveries	391,000,000	617,000,000	216,000,000
Sales of reserves	0	0	(74,000,000)
Revisions of prior reserve estimates	66,000,000	913,000,000	(1,564,000,000)
Current production	(322,000,000)	(333,000,000)	(345,000,000)
End of period	3,612,000,000	3,478,000,000	2,281,000,000
Proved developed reserves (Volume)	2,034,000,000	1,928,000,000	1,358,000,000		1,757,000,000
Proved undeveloped reserves (Volume)	1,578,000,000	1,550,000,000	923,000,000		2,291,000,000
Natural Gas Liquids
Proved Developed and Undeveloped Reserves [Roll Forward]
Beginning of the period	54,000,000	38,000,000	62,000,000
Purchases of reserves	0	0	0
Extensions and discoveries	5,000,000	11,000,000	3,000,000
Sales of reserves	0	0	0
Revisions of prior reserve estimates	0	9,000,000	(23,000,000)
Current production	(4,000,000)	(4,000,000)	(4,000,000)
End of period	54,000,000	54,000,000	38,000,000
Proved developed reserves (Volume)	34,000,000	31,000,000	22,000,000		30,000,000
Proved undeveloped reserves (Volume)	20,000,000	22,000,000	16,000,000		32,000,000