Supplemental Information On Oil And Gas Exploration And Production Activities (Unaudited) - Schedule of Changes in Proved Undeveloped Reserves (Details) - MBoe	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Extractive Industries [Abstract]
Proved undeveloped reserves, Beginning Balance	62,815,000	75,201,000
Conversions to developed	(8,200,000)	(10,254,000)
Extensions and discoveries		1,230,000
Revision to previous estimates	(14,038,000)	(3,362,000)
Proved undeveloped reserves, Ending Balance	40,577,000	62,815,000
Proved undeveloped reserve attributable to noncontrolling interests	21,737,000	34,243,000	41,560,000