Suspended Wells and Exploration Expenses - Aging of Exploratory Well Cost, Capitalized for More than One Year (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	$ 512	$ 656	$ 526
2019-2021
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	308
2016-2018
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	174
2006-2015
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	30
Willow - Alaska
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	315
Willow - Alaska | 2019-2021
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	201
Willow - Alaska | 2016-2018
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	114
Willow - Alaska | 2006-2015
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	0
PL 1009 - Norway
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	39
PL 1009 - Norway | 2019-2021
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	39
PL 1009 - Norway | 2016-2018
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	0
PL 1009 - Norway | 2006-2015
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	0
PL 891 - Norway
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	31
PL 891 - Norway | 2019-2021
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	31
PL 891 - Norway | 2016-2018
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	0
PL 891 - Norway | 2006-2015
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	0
Narwhal Trend - Alaska
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	25
Narwhal Trend - Alaska | 2019-2021
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	0
Narwhal Trend - Alaska | 2016-2018
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	25
Narwhal Trend - Alaska | 2006-2015
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	0
WL4-00 - Malaysia
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	24
WL4-00 - Malaysia | 2019-2021
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	7
WL4-00 - Malaysia | 2016-2018
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	17
WL4-00 - Malaysia | 2006-2015
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	0
PL782S - Norway
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	19
PL782S - Norway | 2019-2021
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	19
PL782S - Norway | 2016-2018
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	0
PL782S - Norway | 2006-2015
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	0
Montney - Canada
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	12
Montney - Canada | 2019-2021
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	4
Montney - Canada | 2016-2018
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	8
Montney - Canada | 2006-2015
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	0
Other of $10 Million or less each
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	47
Other of $10 Million or less each | 2019-2021
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	7
Other of $10 Million or less each | 2016-2018
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	10
Other of $10 Million or less each | 2006-2015
Capitalized Exploratory Well Costs [Line Items]
Exploratory well costs capitalized for a period greater than one year	$ 30