Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013		Dec. 31, 2013
Schedule of Segment Reporting Information By Segment [Abstract]
Net Operating Revenues	$ 5,118,616		$ 3,541,396		$ 13,389,843		$ 10,738,095
Operating Income (Loss)	1,786,162		769,769		4,015,171		2,694,887
Other Income (Expense), Net	(21,338)		11,168		(16,726)		5,867
Interest Expense, Net	49,704		59,382		151,723		182,950
Income Before Income Taxes	1,715,120		721,555		3,846,722		2,517,804
Total Assets	34,500,883				34,500,883				30,574,238
United States [Member]
Schedule of Segment Reporting Information By Segment [Abstract]
Net Operating Revenues	4,924,226		3,337,008		12,748,128		9,981,084
Operating Income (Loss)	1,767,044		747,958		3,900,263		2,522,127
Total Assets	31,578,693				31,578,693				27,668,713
Canada [Member]
Schedule of Segment Reporting Information By Segment [Abstract]
Net Operating Revenues	66,765		77,515		229,901		350,398
Operating Income (Loss)	(17,869)		(21,647)		(43,711)		29,683
Total Assets	809,139				809,139				880,765
Trinidad [Member]
Schedule of Segment Reporting Information By Segment [Abstract]
Net Operating Revenues	123,154		122,280		398,140		390,552
Operating Income (Loss)	61,328		61,087		209,785		213,875
Total Assets	791,625				791,625				986,796
Other International [Member]
Schedule of Segment Reporting Information By Segment [Abstract]
Net Operating Revenues	4,471	[1]	4,593	[1]	13,674	[1]	16,061	[1]
Operating Income (Loss)	(24,341)	[1]	(17,629)	[1]	(51,166)	[1]	(70,798)	[1]
Total Assets	$ 1,321,426	[1]			$ 1,321,426	[1]			$ 1,037,964	[1]

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