Revenue - Summary of Revenue from Contracts with Customers on a Disaggregated Basis (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Total sales	$ 3,287	$ 1,823	$ 8,803	$ 5,416
Other operating revenues	(165)	(64)	(413)	(180)
Total sales and other operating revenues	3,122	1,759	8,390	5,236
Revenue not from contract with customer		0		0
Crude oil revenue (b)
Disaggregation of Revenue [Line Items]
Total sales	1,864	974	4,886	3,135
Natural gas liquids revenue
Disaggregation of Revenue [Line Items]
Total sales	191	143	545	406
Natural gas revenue
Disaggregation of Revenue [Line Items]
Total sales	301	222	927	741
Sales of purchased oil and gas
Disaggregation of Revenue [Line Items]
Total sales	931	484	2,445	1,134
Exploration and Production
Disaggregation of Revenue [Line Items]
Total sales and other operating revenues	3,122	1,759	8,390	5,236
Exploration and Production | Crude oil revenue (b)
Disaggregation of Revenue [Line Items]
Total sales	1,864	974	4,886	3,135
Exploration and Production | Crude oil revenue (b) | United States
Disaggregation of Revenue [Line Items]
Total sales	895	654	2,626	2,200
Exploration and Production | Crude oil revenue (b) | Guyana
Disaggregation of Revenue [Line Items]
Total sales	838	214	1,745	529
Revenue not from contract with customer	56		56
Exploration and Production | Crude oil revenue (b) | Malaysia and JDA
Disaggregation of Revenue [Line Items]
Total sales	34	2	102	51
Exploration and Production | Crude oil revenue (b) | Other
Disaggregation of Revenue [Line Items]
Total sales	97	104	413	355
Exploration and Production | Natural gas liquids revenue
Disaggregation of Revenue [Line Items]
Total sales	191	143	545	406
Exploration and Production | Natural gas liquids revenue | United States
Disaggregation of Revenue [Line Items]
Total sales	191	143	545	406
Exploration and Production | Natural gas liquids revenue | Guyana
Disaggregation of Revenue [Line Items]
Total sales	0	0	0	0
Exploration and Production | Natural gas liquids revenue | Malaysia and JDA
Disaggregation of Revenue [Line Items]
Total sales	0	0	0	0
Exploration and Production | Natural gas liquids revenue | Other
Disaggregation of Revenue [Line Items]
Total sales	0	0	0	0
Exploration and Production | Natural gas revenue
Disaggregation of Revenue [Line Items]
Total sales	301	222	927	741
Exploration and Production | Natural gas revenue | United States
Disaggregation of Revenue [Line Items]
Total sales	145	77	356	251
Exploration and Production | Natural gas revenue | Guyana
Disaggregation of Revenue [Line Items]
Total sales	0	0	0	0
Exploration and Production | Natural gas revenue | Malaysia and JDA
Disaggregation of Revenue [Line Items]
Total sales	150	143	555	484
Exploration and Production | Natural gas revenue | Other
Disaggregation of Revenue [Line Items]
Total sales	6	2	16	6
Exploration and Production | Sales of purchased oil and gas
Disaggregation of Revenue [Line Items]
Total sales	931	484	2,445	1,134
Exploration and Production | Sales of purchased oil and gas | United States
Disaggregation of Revenue [Line Items]
Total sales	889	457	2,310	1,054
Exploration and Production | Sales of purchased oil and gas | Guyana
Disaggregation of Revenue [Line Items]
Total sales	20	4	42	12
Exploration and Production | Sales of purchased oil and gas | Malaysia and JDA
Disaggregation of Revenue [Line Items]
Total sales	0	0	0	0
Exploration and Production | Sales of purchased oil and gas | Other
Disaggregation of Revenue [Line Items]
Total sales	22	23	93	68
Midstream
Disaggregation of Revenue [Line Items]
Total sales and other operating revenues	0	0	0	0
Midstream | Crude oil revenue (b)
Disaggregation of Revenue [Line Items]
Total sales	0	0	0	0
Midstream | Natural gas liquids revenue
Disaggregation of Revenue [Line Items]
Total sales	0	0	0	0
Midstream | Natural gas revenue
Disaggregation of Revenue [Line Items]
Total sales	0	0	0	0
Midstream | Sales of purchased oil and gas
Disaggregation of Revenue [Line Items]
Total sales	0	0	0	0
Operating Segments | Exploration and Production
Disaggregation of Revenue [Line Items]
Total sales	3,287	1,823	8,803	5,416
Other operating revenues	(165)	(64)	(413)	(180)
Total sales and other operating revenues	3,122	1,759	8,390	5,236
Operating Segments | Exploration and Production | United States
Disaggregation of Revenue [Line Items]
Total sales	2,120	1,331	5,837	3,911
Other operating revenues	(98)	(51)	(251)	(145)
Total sales and other operating revenues	2,022	1,280	5,586	3,766
Operating Segments | Exploration and Production | Guyana
Disaggregation of Revenue [Line Items]
Total sales	858	218	1,787	541
Other operating revenues	(59)	(9)	(126)	(19)
Total sales and other operating revenues	799	209	1,661	522
Operating Segments | Exploration and Production | Malaysia and JDA
Disaggregation of Revenue [Line Items]
Total sales	184	145	657	535
Other operating revenues	0	0	0	0
Total sales and other operating revenues	184	145	657	535
Operating Segments | Exploration and Production | Other
Disaggregation of Revenue [Line Items]
Total sales	125	129	522	429
Other operating revenues	(8)	(4)	(36)	(16)
Total sales and other operating revenues	117	125	486	413
Operating Segments | Midstream
Disaggregation of Revenue [Line Items]
Total sales	335	304	961	887
Other operating revenues	0	0	0	0
Total sales and other operating revenues	335	304	961	887
Eliminations
Disaggregation of Revenue [Line Items]
Total sales	(335)	(304)	(961)	(887)
Other operating revenues	0	0	0	0
Total sales and other operating revenues	(335)	(304)	(961)	(887)
Eliminations | Exploration and Production
Disaggregation of Revenue [Line Items]
Total sales	0	0	0	0
Total sales and other operating revenues	0	0	0	0
Eliminations | Exploration and Production | United States
Disaggregation of Revenue [Line Items]
Total sales	0	0	0	0
Eliminations | Exploration and Production | Guyana
Disaggregation of Revenue [Line Items]
Total sales	0	0	0	0
Eliminations | Exploration and Production | Malaysia and JDA
Disaggregation of Revenue [Line Items]
Total sales	0	0	0	0
Eliminations | Exploration and Production | Other
Disaggregation of Revenue [Line Items]
Total sales	0	0	0	0
Eliminations | Midstream
Disaggregation of Revenue [Line Items]
Total sales	335	304	961	887
Total sales and other operating revenues	$ 335	$ 304	$ 961	$ 887