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REVENUE - Schedule of Revenue from Customers by Segment, Product, and Geographical Area (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of revenue
Revenue from customers	$ 6,682	$ 7,020	$ 19,911	$ 20,553
United States
Disaggregation of revenue
Revenue from customers			17,379	17,866
International
Disaggregation of revenue
Revenue from customers			3,303	3,330
Operating segments
Disaggregation of revenue
Revenue from customers	6,682	7,020
Operating segments | United States
Disaggregation of revenue
Revenue from customers	5,798	6,139
Operating segments | International
Disaggregation of revenue
Revenue from customers	1,136	1,091
Eliminations
Disaggregation of revenue
Revenue from customers	(252)	(210)	(771)	(643)
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	5,404	5,697	16,096	16,081
Oil and gas | Operating segments | Oil
Disaggregation of revenue
Revenue from customers	4,459	4,930	13,110	13,823
Oil and gas | Operating segments | NGL
Disaggregation of revenue
Revenue from customers	557	592	1,774	1,607
Oil and gas | Operating segments | Gas
Disaggregation of revenue
Revenue from customers	331	151	1,089	583
Oil and gas | Operating segments | Other
Disaggregation of revenue
Revenue from customers	57	24	123	68
Oil and gas | Operating segments | United States
Disaggregation of revenue
Revenue from customers	4,529	4,782	13,500	13,259
Oil and gas | Operating segments | United States | Oil
Disaggregation of revenue
Revenue from customers	3,764	4,204	11,050	11,564
Oil and gas | Operating segments | United States | NGL
Disaggregation of revenue
Revenue from customers	469	495	1,504	1,314
Oil and gas | Operating segments | United States | Gas
Disaggregation of revenue
Revenue from customers	240	60	826	314
Oil and gas | Operating segments | United States | Other
Disaggregation of revenue
Revenue from customers	56	23	120	67
Oil and gas | Operating segments | International
Disaggregation of revenue
Revenue from customers	875	915	2,596	2,822
Oil and gas | Operating segments | International | Oil
Disaggregation of revenue
Revenue from customers	695	726	2,060	2,259
Oil and gas | Operating segments | International | NGL
Disaggregation of revenue
Revenue from customers	88	97	270	293
Oil and gas | Operating segments | International | Gas
Disaggregation of revenue
Revenue from customers	91	91	263	269
Oil and gas | Operating segments | International | Other
Disaggregation of revenue
Revenue from customers	1	1	3	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	1,165	1,246	3,578	3,704
Chemical | Operating segments | United States
Disaggregation of revenue
Revenue from customers	1,091	1,171	3,357	3,489
Chemical | Operating segments | International
Disaggregation of revenue
Revenue from customers	74	75	221	215
Chemical | Eliminations
Disaggregation of revenue
Revenue from customers	0	0	0	0
Midstream and marketing | Operating segments
Disaggregation of revenue
Revenue from customers	365	287	1,008	1,411
Midstream and marketing | Operating segments | United States
Disaggregation of revenue
Revenue from customers	178	186	522	1,118
Midstream and marketing | Operating segments | International
Disaggregation of revenue
Revenue from customers	187	101	486	293
Midstream and marketing | Eliminations
Disaggregation of revenue
Revenue from customers	$ 0	$ 0	$ 0	$ 0

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