Revenue - Summary of Revenue from Contracts with Customers on a Disaggregated Basis (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax		$ 2,399
Revenue from both contract with customer and not from contract with customer	$ 2,442
Other operating revenues	(31)	(86)
Total revenues and non-operating income	2,411	2,313
Crude oil revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax		1,239
Revenue from both contract with customer and not from contract with customer	1,523
Natural gas liquids revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	141	181
Natural gas revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	234	280
Sales of purchased oil and gas
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	544	699
Exploration and Production
Disaggregation of Revenue [Line Items]
Total revenues and non-operating income	2,409	2,313
Exploration and Production | Crude oil revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax		1,239
Revenue from both contract with customer and not from contract with customer	1,523
Exploration and Production | Crude oil revenue | United States
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	669	836
Exploration and Production | Crude oil revenue | Guyana
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax		226
Revenue from both contract with customer and not from contract with customer	825
Revenue not from contract with customer	108	0
Exploration and Production | Crude oil revenue | Malaysia and JDA
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	29	31
Exploration and Production | Crude oil revenue | Other
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	146
Exploration and Production | Natural gas liquids revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	141	181
Exploration and Production | Natural gas liquids revenue | United States
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	141	181
Exploration and Production | Natural gas liquids revenue | Guyana
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	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
Exploration and Production | Natural gas liquids revenue | Other
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0
Exploration and Production | Natural gas revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	234	280
Exploration and Production | Natural gas revenue | United States
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	54	85
Exploration and Production | Natural gas revenue | Guyana
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0
Exploration and Production | Natural gas revenue | Malaysia and JDA
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	180	190
Exploration and Production | Natural gas revenue | Other
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	5
Exploration and Production | Sales of purchased oil and gas
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	544	699
Exploration and Production | Sales of purchased oil and gas | United States
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	527	660
Exploration and Production | Sales of purchased oil and gas | Guyana
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	17	4
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
Exploration and Production | Sales of purchased oil and gas | Other
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	35
Midstream
Disaggregation of Revenue [Line Items]
Total revenues and non-operating income	2	0
Midstream | Crude oil revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0
Midstream | Natural gas liquids revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0
Midstream | Natural gas revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0
Midstream | Sales of purchased oil and gas
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0
Operating Segments | Exploration and Production
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax		2,399
Revenue from both contract with customer and not from contract with customer	2,442
Other operating revenues	(33)	(86)
Total revenues and non-operating income	2,409	2,313
Operating Segments | Exploration and Production | United States
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	1,391	1,762
Other operating revenues	(26)	(58)
Total revenues and non-operating income	1,365	1,704
Operating Segments | Exploration and Production | Guyana
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax		230
Revenue from both contract with customer and not from contract with customer	842
Other operating revenues	(7)	(15)
Total revenues and non-operating income	835	215
Operating Segments | Exploration and Production | Malaysia and JDA
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	209	221
Other operating revenues	0	0
Total revenues and non-operating income	209	221
Operating Segments | Exploration and Production | Other
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	186
Other operating revenues	0	(13)
Total revenues and non-operating income	0	173
Operating Segments | Midstream
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	303	312
Other operating revenues	2	0
Total revenues and non-operating income	305	312
Eliminations
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	(303)	(312)
Other operating revenues	0	0
Total revenues and non-operating income	(303)	(312)
Eliminations | Exploration and Production
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0
Total revenues and non-operating income	0	0
Eliminations | Exploration and Production | United States
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0
Eliminations | Exploration and Production | Guyana
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0
Eliminations | Exploration and Production | Malaysia and JDA
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0
Eliminations | Exploration and Production | Other
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0
Eliminations | Midstream
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	303	312
Total revenues and non-operating income	$ 303	$ 312