Property, Plant and Equipment (Aging of Capitalized Exploratory Well Costs) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2022 USD ($) well project	Sep. 30, 2021 USD ($) project well	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]
Amount | $	$ 181,461	$ 186,623	$ 179,481	$ 181,616
No. of Wells (in wells) | well	10	13
No. of Projects (in projects) | project	7	7
Zero to one year
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]
Amount | $	$ 8,851	$ 3,297
No. of Wells (in wells) | well	2	2
No. of Projects (in projects) | project	2	2
One to two years
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]
Amount | $	$ 8,489	$ 0
No. of Wells (in wells) | well	2	0
No. of Projects (in projects) | project	2	0
Two to three years
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]
Amount | $	$ 0	$ 53,078
No. of Wells (in wells) | well	0	5
No. of Projects (in projects) | project	0	5
Three years or more
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]
Amount | $	$ 164,121	$ 130,248
No. of Wells (in wells) | well	6	6
No. of Projects (in projects) | project	3	0