REVENUE - Schedule of Revenue from Customers by Segment, Product, and Geographical Area (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of revenue
Revenue from customers	$ 7,020	$ 7,271	$ 20,553	$ 20,987
United States
Disaggregation of revenue
Revenue from customers			17,866	18,450
International
Disaggregation of revenue
Revenue from customers			3,330	3,320
Operating segments
Disaggregation of revenue
Revenue from customers	7,020	7,271
Operating segments | United States
Disaggregation of revenue
Revenue from customers	6,139	6,471
Operating segments | International
Disaggregation of revenue
Revenue from customers	1,091	1,097
Eliminations
Disaggregation of revenue
Revenue from customers	(210)	(297)	(643)	(783)
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	5,697	5,594	16,081	15,860
Oil and gas | Operating segments | Oil
Disaggregation of revenue
Revenue from customers	4,930	4,739	13,823	13,348
Oil and gas | Operating segments | NGL
Disaggregation of revenue
Revenue from customers	592	510	1,607	1,497
Oil and gas | Operating segments | Gas
Disaggregation of revenue
Revenue from customers	151	308	583	983
Oil and gas | Operating segments | Other
Disaggregation of revenue
Revenue from customers	24	37	68	32
Oil and gas | Operating segments | United States
Disaggregation of revenue
Revenue from customers	4,782	4,674	13,259	13,092
Oil and gas | Operating segments | United States | Oil
Disaggregation of revenue
Revenue from customers	4,204	3,997	11,564	11,093
Oil and gas | Operating segments | United States | NGL
Disaggregation of revenue
Revenue from customers	495	419	1,314	1,231
Oil and gas | Operating segments | United States | Gas
Disaggregation of revenue
Revenue from customers	60	221	314	737
Oil and gas | Operating segments | United States | Other
Disaggregation of revenue
Revenue from customers	23	37	67	31
Oil and gas | Operating segments | International
Disaggregation of revenue
Revenue from customers	915	920	2,822	2,768
Oil and gas | Operating segments | International | Oil
Disaggregation of revenue
Revenue from customers	726	742	2,259	2,255
Oil and gas | Operating segments | International | NGL
Disaggregation of revenue
Revenue from customers	97	91	293	266
Oil and gas | Operating segments | International | Gas
Disaggregation of revenue
Revenue from customers	91	87	269	246
Oil and gas | Operating segments | International | Other
Disaggregation of revenue
Revenue from customers	1	0	1	1
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	1,246	1,308	3,704	4,084
Chemical | Operating segments | United States
Disaggregation of revenue
Revenue from customers	1,171	1,234	3,489	3,834
Chemical | Operating segments | International
Disaggregation of revenue
Revenue from customers	75	74	215	250
Chemical | Eliminations
Disaggregation of revenue
Revenue from customers	0	0	0	0
Midstream and marketing | Operating segments
Disaggregation of revenue
Revenue from customers	287	666	1,411	1,826
Midstream and marketing | Operating segments | United States
Disaggregation of revenue
Revenue from customers	186	563	1,118	1,524
Midstream and marketing | Operating segments | International
Disaggregation of revenue
Revenue from customers	101	103	293	302
Midstream and marketing | Eliminations
Disaggregation of revenue
Revenue from customers	$ 0	$ 0	$ 0	$ 0