Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other		$ 3,681,162	$ 2,610,565
Operating Income (Loss)		874,588	107,746
Other Income, Net		727	3,151
Interest Expense, Net		61,956	71,515
Income Before Income Taxes		813,359	39,382
Total Assets		30,740,517		$ 29,833,078
United States [Member]
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other		3,571,134	2,519,849
Operating Income (Loss)		845,853	119,531
Total Assets		29,780,881		28,312,599
Trinidad [Member]
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other		81,013	73,923
Operating Income (Loss)		40,297	16,413
Total Assets		610,376		974,477
Other International [Member]
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other	[1]	29,015	16,793
Operating Income (Loss)	[1]	(11,562)	$ (28,198)
Total Assets	[1]	$ 349,260		$ 546,002

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