REVENUE - Schedule of Revenue from Customers by Segment, Product, and Geographical Area (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of revenue
Revenue from customers	$ 6,601	$ 10,351	$ 13,716	$ 18,564
United States
Disaggregation of revenue
Revenue from customers	5,682	9,070	11,979	16,523
International
Disaggregation of revenue
Revenue from customers	1,149	1,684	2,223	2,736
Eliminations
Disaggregation of revenue
Revenue from customers	(230)	(403)	(486)	(695)
Eliminations | United States
Disaggregation of revenue
Revenue from customers	0	0	0	0
Eliminations | International
Disaggregation of revenue
Revenue from customers	0	0	0	0
Oil and gas | Operating segments
Disaggregation of revenue
Revenue from customers	4,941	7,696	10,266	13,771
Oil and gas | Operating segments | Oil
Disaggregation of revenue
Revenue from customers	4,241	6,040	8,609	10,839
Oil and gas | Operating segments | NGL
Disaggregation of revenue
Revenue from customers	442	896	987	1,656
Oil and gas | Operating segments | Gas
Disaggregation of revenue
Revenue from customers	248	754	675	1,267
Oil and gas | Operating segments | Other
Disaggregation of revenue
Revenue from customers	10	6	(5)	9
Oil and gas | Operating segments | United States
Disaggregation of revenue
Revenue from customers	3,969	6,357	8,418	11,560
Oil and gas | Operating segments | United States | Oil
Disaggregation of revenue
Revenue from customers	3,446	4,894	7,096	8,942
Oil and gas | Operating segments | United States | NGL
Disaggregation of revenue
Revenue from customers	352	783	812	1,481
Oil and gas | Operating segments | United States | Gas
Disaggregation of revenue
Revenue from customers	161	675	516	1,130
Oil and gas | Operating segments | United States | Other
Disaggregation of revenue
Revenue from customers	10	5	(6)	7
Oil and gas | Operating segments | International
Disaggregation of revenue
Revenue from customers	972	1,339	1,848	2,211
Oil and gas | Operating segments | International | Oil
Disaggregation of revenue
Revenue from customers	795	1,146	1,513	1,897
Oil and gas | Operating segments | International | NGL
Disaggregation of revenue
Revenue from customers	90	113	175	175
Oil and gas | Operating segments | International | Gas
Disaggregation of revenue
Revenue from customers	87	79	159	137
Oil and gas | Operating segments | International | Other
Disaggregation of revenue
Revenue from customers	0	1	1	2
Oil and gas | Eliminations
Disaggregation of revenue
Revenue from customers	0	0	0	0
Oil and gas | Eliminations | Oil
Disaggregation of revenue
Revenue from customers	0	0	0	0
Oil and gas | Eliminations | NGL
Disaggregation of revenue
Revenue from customers	0	0	0	0
Oil and gas | Eliminations | Gas
Disaggregation of revenue
Revenue from customers	0	0	0	0
Oil and gas | Eliminations | Other
Disaggregation of revenue
Revenue from customers	0	0	0	0
Chemical | Operating segments
Disaggregation of revenue
Revenue from customers	1,374	1,908	2,776	3,591
Chemical | Operating segments | United States
Disaggregation of revenue
Revenue from customers	1,292	1,810	2,600	3,412
Chemical | Operating segments | International
Disaggregation of revenue
Revenue from customers	82	98	176	179
Chemical | Eliminations
Disaggregation of revenue
Revenue from customers	0	0	0	0
Midstream and marketing | Operating segments
Disaggregation of revenue
Revenue from customers	516	1,150	1,160	1,897
Midstream and marketing | Operating segments | United States
Disaggregation of revenue
Revenue from customers	421	903	961	1,551
Midstream and marketing | Operating segments | International
Disaggregation of revenue
Revenue from customers	95	247	199	346
Midstream and marketing | Eliminations
Disaggregation of revenue
Revenue from customers	$ 0	$ 0	$ 0	$ 0