Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other		$ 4,697,630	$ 4,238,077	$ 8,756,272	$ 7,919,239
Operating Income (Loss)		1,130,771	964,931	2,007,301	1,839,519
Other Income, Net		8,503	(8,551)	14,115	(7,824)
Interest Expense, Net		(49,908)	(63,444)	(104,814)	(125,400)
Income Before Income Taxes		1,089,366	892,936	1,916,602	1,706,295
Total Assets		35,751,501		35,751,501		$ 33,934,474
United States
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other		4,611,789	4,114,610	8,588,808	7,685,744
Operating Income (Loss)		1,107,910	946,883	1,958,810	1,792,736
Total Assets		35,025,034		35,025,034		33,178,733
Trinidad
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other		71,132	81,611	141,000	162,624
Operating Income (Loss)		34,390	27,821	73,222	68,118
Total Assets		586,586		586,586		629,633
Other International
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other	[1]	14,709	41,856	26,464	70,871
Operating Income (Loss)	[1]	(11,529)	$ (9,773)	(24,731)	$ (21,335)
Total Assets	[1]	$ 139,881		$ 139,881		$ 126,108

[1] Other International primarily consists of EOG's United Kingdom, China and Canada operations. The United Kingdom operations were sold in the fourth quarter of 2018.