Revenue - Summary of Revenue from Contracts with Customers on a Disaggregated Basis (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax				$ 0
Revenue from both contract with customer and not from contract with customer	$ 3,197,000,000	$ 2,337,000,000	$ 6,505,000,000	4,779,000,000
Other operating revenues	5,000,000	(48,000,000)	6,000,000	(79,000,000)
Total revenues and non-operating income	3,202,000,000	2,289,000,000	6,511,000,000	4,700,000,000
Gain (loss) on commodity derivatives	$ 0	$ (52,000,000)	$ 0	$ (86,000,000)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Total revenues and non-operating income	Total revenues and non-operating income	Total revenues and non-operating income	Total revenues and non-operating income
Crude oil revenue
Disaggregation of Revenue [Line Items]
Revenue from both contract with customer and not from contract with customer	$ 2,219,000,000	$ 1,521,000,000	$ 4,547,000,000	$ 3,044,000,000
Crude oil revenue | Guyana
Disaggregation of Revenue [Line Items]
Revenue not from contract with customer		88,000,000	466,000,000	196,000,000
Natural gas liquids revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	140,000,000	112,000,000	293,000,000	253,000,000
Natural gas revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	257,000,000	220,000,000	516,000,000	454,000,000
Sales of purchased oil and gas
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	575,000,000	484,000,000	1,138,000,000	1,028,000,000
Third-party services
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	6,000,000		11,000,000
Exploration and Production
Disaggregation of Revenue [Line Items]
Total revenues and non-operating income	3,195,000,000	2,287,000,000	6,498,000,000	4,696,000,000
Exploration and Production | Crude oil revenue
Disaggregation of Revenue [Line Items]
Revenue from both contract with customer and not from contract with customer	2,219,000,000	1,521,000,000	4,547,000,000	3,044,000,000
Exploration and Production | Crude oil revenue | United States
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	820,000,000	710,000,000	1,609,000,000	1,379,000,000
Exploration and Production | Crude oil revenue | Guyana
Disaggregation of Revenue [Line Items]
Revenue from both contract with customer and not from contract with customer	1,370,000,000	787,000,000	2,880,000,000	1,612,000,000
Revenue not from contract with customer	214,000,000
Exploration and Production | Crude oil revenue | Malaysia and JDA
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	29,000,000	24,000,000	58,000,000	53,000,000
Exploration and Production | Natural gas liquids revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	140,000,000	112,000,000	293,000,000	253,000,000
Exploration and Production | Natural gas liquids revenue | United States
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	140,000,000	112,000,000	293,000,000	253,000,000
Exploration and Production | Natural gas liquids revenue | Guyana
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
Exploration and Production | Natural gas liquids revenue | Malaysia and JDA
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
Exploration and Production | Natural gas revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	257,000,000	220,000,000	516,000,000	454,000,000
Exploration and Production | Natural gas revenue | United States
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	28,000,000	38,000,000	76,000,000	92,000,000
Exploration and Production | Natural gas revenue | Guyana
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
Exploration and Production | Natural gas revenue | Malaysia and JDA
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	229,000,000	182,000,000	440,000,000	362,000,000
Exploration and Production | Sales of purchased oil and gas
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	575,000,000	484,000,000	1,138,000,000	1,028,000,000
Exploration and Production | Sales of purchased oil and gas | United States
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	548,000,000	469,000,000	1,081,000,000	996,000,000
Exploration and Production | Sales of purchased oil and gas | Guyana
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	27,000,000	15,000,000	57,000,000	32,000,000
Exploration and Production | Sales of purchased oil and gas | Malaysia and JDA
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
Exploration and Production | Third-party services
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0		0
Exploration and Production | Third-party services | United States
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0		0
Exploration and Production | Third-party services | Guyana
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0		0
Exploration and Production | Third-party services | Malaysia and JDA
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0		0
Midstream
Disaggregation of Revenue [Line Items]
Total revenues and non-operating income	7,000,000	2,000,000	13,000,000	4,000,000
Midstream | Crude oil revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
Midstream | Natural gas liquids revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
Midstream | Natural gas revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
Midstream | Sales of purchased oil and gas
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
Midstream | Third-party services
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	6,000,000		11,000,000
Operating Segments | Exploration and Production
Disaggregation of Revenue [Line Items]
Revenue from both contract with customer and not from contract with customer	3,191,000,000	2,337,000,000	6,494,000,000	4,779,000,000
Other operating revenues	4,000,000	(50,000,000)	4,000,000	(83,000,000)
Total revenues and non-operating income	3,195,000,000	2,287,000,000	6,498,000,000	4,696,000,000
Operating Segments | Exploration and Production | United States
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	1,536,000,000	1,329,000,000	3,059,000,000	2,720,000,000
Other operating revenues	4,000,000	(30,000,000)	4,000,000	(56,000,000)
Total revenues and non-operating income	1,540,000,000	1,299,000,000	3,063,000,000	2,664,000,000
Operating Segments | Exploration and Production | Guyana
Disaggregation of Revenue [Line Items]
Revenue from both contract with customer and not from contract with customer	1,397,000,000	802,000,000	2,937,000,000	1,644,000,000
Other operating revenues	0	(20,000,000)	0	(27,000,000)
Total revenues and non-operating income	1,397,000,000	782,000,000	2,937,000,000	1,617,000,000
Operating Segments | Exploration and Production | Malaysia and JDA
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	258,000,000	206,000,000	498,000,000	415,000,000
Other operating revenues	0	0	0	0
Total revenues and non-operating income	258,000,000	206,000,000	498,000,000	415,000,000
Operating Segments | Midstream
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	364,000,000	322,000,000	719,000,000	625,000,000
Other operating revenues	1,000,000	2,000,000	2,000,000	4,000,000
Total revenues and non-operating income	365,000,000	324,000,000	721,000,000	629,000,000
Eliminations
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	(358,000,000)	(322,000,000)	(708,000,000)	(625,000,000)
Other operating revenues	0	0	0	0
Total revenues and non-operating income	(358,000,000)	(322,000,000)	(708,000,000)	(625,000,000)
Eliminations | Exploration and Production
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
Total revenues and non-operating income	0	0	0	0
Eliminations | Exploration and Production | United States
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
Eliminations | Exploration and Production | Guyana
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
Eliminations | Exploration and Production | Malaysia and JDA
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
Eliminations | Midstream
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	358,000,000	322,000,000	708,000,000	625,000,000
Total revenues and non-operating income	$ 358,000,000	$ 322,000,000	$ 708,000,000	$ 625,000,000