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, 2018	Dec. 31, 2017	Dec. 31, 2016
Extractive Industries [Abstract]
Proved undeveloped reserves, Beginning Balance	60,015	2,690
Conversions to developed	(4,419)	(2,756)	(732)
Extensions and discoveries	13,734	27,977
Sales of minerals in place	(4,702)	(391)
Purchases of minerals in place	4,735	37,327
Revision to previous estimates	5,838	(4,832)
Proved undeveloped reserves, Ending Balance	75,201	60,015	2,690
Proved undeveloped reserve attributable to noncontrolling interests	41,560	34,029