Property, Plant And Equipment - Aging of Capitalized Exploratory Well Costs (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) project well	Dec. 31, 2020 USD ($) well project	Dec. 31, 2019 USD ($) well project	Dec. 31, 2018 USD ($)
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]
Amount | $	$ 179,481	$ 181,616	$ 217,326	$ 207,855
No. of Wells (in wells) | well	14	11	11
No. of Projects (in projects) | project	8	5	5
Zero to one year
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]
Amount | $	$ 13,273	$ 0	$ 63,409
No. of Wells (in wells) | well	3	0	5
No. of Projects (in projects) | project	3	0	5
One to two years
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]
Amount | $	$ 0	$ 54,220	$ 0
No. of Wells (in wells) | well	0	5	0
No. of Projects (in projects) | project	0	5	0
Two to three years
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]
Amount | $	$ 53,070	$ 0	$ 27,396
No. of Wells (in wells) | well	5	0	1
No. of Projects (in projects) | project	5	0	0
Three years or more
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]
Amount | $	$ 113,138	$ 127,396	$ 126,521
No. of Wells (in wells) | well	6	6	5
No. of Projects (in projects) | project	0	0	0