Property, Plant and Equipment - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Cost	$ 21,360,582	$ 20,717,987
Net	8,225,197	8,228,016
Exploration and Production
Property, Plant and Equipment [Line Items]
Cost	21,228,490	20,567,489
Net	8,201,475	8,204,463
Corporate and other
Property, Plant and Equipment [Line Items]
Cost	132,092	150,498
Net	23,722	23,553
Mineral Rights
Property, Plant and Equipment [Line Items]
Cost	351,000	476,981
Net	228,329	344,507
Administrative Assets and Support Equipment
Property, Plant and Equipment [Line Items]
Net	$ 15,356	$ 18,319