Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Schedule of Segment Reporting Information By Segment [Abstract]
Net Operating Revenues		$ 2,172,428	$ 5,118,616	$ 6,960,667	$ 13,389,843
Operating Income (Loss)		(6,222,957)	1,786,162	(6,356,326)	4,015,171
Other Income (Expense), Net		8,607	(21,338)	7,996	(16,726)
Interest Expense, Net		60,571	49,704	174,400	151,723
Income (Loss) Before Income Taxes		(6,274,921)	1,715,120	(6,522,730)	3,846,722
Total Assets		27,277,247		27,277,247		$ 34,762,687
United States [Member]
Schedule of Segment Reporting Information By Segment [Abstract]
Net Operating Revenues		2,040,881	4,924,226	6,622,781	12,748,128
Operating Income (Loss)		(6,110,284)	1,767,044	(6,271,908)	3,900,263
Total Assets		25,550,746		25,550,746		32,871,398
Trinidad [Member]
Schedule of Segment Reporting Information By Segment [Abstract]
Net Operating Revenues		98,493	123,154	290,758	398,140
Operating Income (Loss)		46,230	61,328	139,116	209,785
Total Assets		879,643		879,643		865,674
Other International [Member]
Schedule of Segment Reporting Information By Segment [Abstract]
Net Operating Revenues	[1]	33,054	71,236	47,128	243,575
Operating Income (Loss)	[1]	(158,903)	$ (42,210)	(223,534)	$ (94,877)
Total Assets	[1]	$ 846,858		$ 846,858		$ 1,025,615

[1] Other International primarily includes EOG's Canada, United Kingdom, China and Argentina operations.