Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013		Dec. 31, 2013
Schedule of Segment Reporting Information By Segment [Abstract]
Net Operating Revenues	$ 4,187,556		$ 3,840,185		$ 8,271,227		$ 7,196,699
Operating Income (Loss)	1,144,730		1,092,044		2,229,009		1,925,118
Other Income (Expense), Net	7,950		4,833		4,612		(5,301)
Interest Expense, Net	51,867		61,647		102,019		123,568
Income Before Income Taxes	1,100,813		1,035,230		2,131,602		1,796,249
Total Assets	33,302,434				33,302,434				30,574,238
United States [Member]
Schedule of Segment Reporting Information By Segment [Abstract]
Net Operating Revenues	3,971,837		3,612,224		7,823,902		6,644,076
Operating Income (Loss)	1,092,198		1,083,643		2,133,219		1,774,169
Total Assets	30,428,057				30,428,057				27,668,713
Canada [Member]
Schedule of Segment Reporting Information By Segment [Abstract]
Net Operating Revenues	72,562		89,140		163,136		272,883
Operating Income (Loss)	(15,804)		(20,083)		(25,842)		51,330
Total Assets	856,065				856,065				880,765
Trinidad [Member]
Schedule of Segment Reporting Information By Segment [Abstract]
Net Operating Revenues	138,253		132,924		274,986		268,272
Operating Income (Loss)	74,142		71,893		148,457		152,788
Total Assets	1,023,244				1,023,244				986,796
Other International [Member]
Schedule of Segment Reporting Information By Segment [Abstract]
Net Operating Revenues	4,904	[1]	5,897	[1]	9,203	[1]	11,468	[1]
Operating Income (Loss)	(5,806)	[1]	(43,409)	[1]	(26,825)	[1]	(53,169)	[1]
Total Assets	$ 995,068	[1]			$ 995,068	[1]			$ 1,037,964	[1]

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