Property, Plant and Equipment - Exploratory Drilling Costs Capitalized (Detail) $ in Millions	Dec. 31, 2024 USD ($)
Oil and Gas, Capitalized Exploratory Well Cost, Capitalized for Period Greater than One Year, Aging [Line Items]
Capitalized exploratory well costs that have been capitalized for period greater than one year	$ 787
2023
Oil and Gas, Capitalized Exploratory Well Cost, Capitalized for Period Greater than One Year, Aging [Line Items]
Capitalized exploratory well costs that have been capitalized for period greater than one year	214
2022
Oil and Gas, Capitalized Exploratory Well Cost, Capitalized for Period Greater than One Year, Aging [Line Items]
Capitalized exploratory well costs that have been capitalized for period greater than one year	218
2021
Oil and Gas, Capitalized Exploratory Well Cost, Capitalized for Period Greater than One Year, Aging [Line Items]
Capitalized exploratory well costs that have been capitalized for period greater than one year	106
2020
Oil and Gas, Capitalized Exploratory Well Cost, Capitalized for Period Greater than One Year, Aging [Line Items]
Capitalized exploratory well costs that have been capitalized for period greater than one year	8
2019 and prior
Oil and Gas, Capitalized Exploratory Well Cost, Capitalized for Period Greater than One Year, Aging [Line Items]
Capitalized exploratory well costs that have been capitalized for period greater than one year	$ 241