Revenue - Disaggregation of revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of revenue
Revenue from customers	$ 9,359	$ 6,880	$ 27,923	$ 18,166
United States
Disaggregation of revenue
Revenue from customers	8,252	5,995	24,775	15,883
International
Disaggregation of revenue
Revenue from customers	1,511	1,146	4,247	3,041
Eliminations
Disaggregation of revenue
Revenue from customers	(404)	(261)	(1,099)	(758)
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
Disaggregation of revenue
Revenue from customers	7,098	5,056	20,869	13,463
Oil and gas | Oil
Disaggregation of revenue
Revenue from customers	5,430	3,822	16,269	10,546
Oil and gas | NGL
Disaggregation of revenue
Revenue from customers	785	732	2,441	1,718
Oil and gas | Gas
Disaggregation of revenue
Revenue from customers	874	475	2,141	1,179
Oil and gas | Other
Disaggregation of revenue
Revenue from customers	9	27	18	20
Oil and gas | United States
Disaggregation of revenue
Revenue from customers	5,821	4,123	17,381	11,027
Oil and gas | United States | Oil
Disaggregation of revenue
Revenue from customers	4,369	3,056	13,311	8,548
Oil and gas | United States | NGL
Disaggregation of revenue
Revenue from customers	658	642	2,139	1,498
Oil and gas | United States | Gas
Disaggregation of revenue
Revenue from customers	786	399	1,916	963
Oil and gas | United States | Other
Disaggregation of revenue
Revenue from customers	8	26	15	18
Oil and gas | International
Disaggregation of revenue
Revenue from customers	1,277	933	3,488	2,436
Oil and gas | International | Oil
Disaggregation of revenue
Revenue from customers	1,061	766	2,958	1,998
Oil and gas | International | NGL
Disaggregation of revenue
Revenue from customers	127	90	302	220
Oil and gas | International | Gas
Disaggregation of revenue
Revenue from customers	88	76	225	216
Oil and gas | International | Other
Disaggregation of revenue
Revenue from customers	1	1	3	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
Disaggregation of revenue
Revenue from customers	1,674	1,395	5,265	3,669
Chemical | United States
Disaggregation of revenue
Revenue from customers	1,572	1,329	4,984	3,494
Chemical | International
Disaggregation of revenue
Revenue from customers	102	66	281	175
Chemical | Eliminations
Disaggregation of revenue
Revenue from customers	0	0	0	0
Midstream and marketing
Disaggregation of revenue
Revenue from customers	991	690	2,888	1,792
Midstream and marketing | United States
Disaggregation of revenue
Revenue from customers	859	543	2,410	1,362
Midstream and marketing | International
Disaggregation of revenue
Revenue from customers	132	147	478	430
Midstream and marketing | Eliminations
Disaggregation of revenue
Revenue from customers	$ 0	$ 0	$ 0	$ 0