Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other		$ 4,238,077	$ 2,612,472	$ 7,919,239	$ 5,223,037
Operating Income (Loss)		964,931	127,908	1,839,519	235,654
Other Income (Expense), Net		(8,551)	4,972	(7,824)	8,123
Interest Expense, Net		63,444	70,413	125,400	141,928
Income Before Income Taxes		892,936	62,467	1,706,295	101,849
Total Assets		32,092,380		32,092,380		$ 29,833,078
United States [Member]
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other		4,114,610	2,530,885	7,685,744	5,050,734
Operating Income (Loss)		946,883	130,314	1,792,736	249,845
Total Assets		31,114,907		31,114,907		28,312,599
Trinidad [Member]
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other		81,611	72,299	162,624	146,222
Operating Income (Loss)		27,821	32,360	68,118	48,773
Total Assets		624,358		624,358		974,477
Other International [Member]
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other	[1]	41,856	9,288	70,871	26,081
Operating Income (Loss)	[1]	(9,773)	$ (34,766)	(21,335)	$ (62,964)
Total Assets	[1]	$ 353,115		$ 353,115		$ 546,002

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