Business Segment Information (Details) (USD $)	3 Months Ended										12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012		Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Schedule of Segment Reporting Information By Segment [Abstract]
Crude Oil and Condensate											$ 8,300,647,000		$ 5,659,437,000		$ 3,838,284,000
Natural Gas Liquids											773,970,000		727,177,000		779,364,000
Natural Gas											1,681,029,000		1,571,762,000		2,240,540,000
(Losses) Gains on Mark-to-Market Commodity Derivative Contracts											(166,349,000)		393,744,000		626,053,000
Gathering, Processing and Marketing											3,643,749,000		3,096,694,000		2,115,792,000
Gains on Asset Dispositions, Net											197,565,000		192,660,000		492,909,000
Other, Net											56,507,000		41,162,000		33,173,000
Net Operating Revenues	3,749,023,000		3,541,396,000	3,840,185,000	3,356,514,000	3,011,811,000		2,954,855,000	2,909,319,000	2,806,651,000	14,487,118,000	[1]	11,682,636,000	[2]	10,126,115,000	[3]
Depreciation, Depletion and Amortization											3,600,976,000		3,169,703,000		2,516,381,000
Operating Income (Loss)	980,324,000		769,769,000	1,092,044,000	833,074,000	(378,061,000)		605,747,000	692,339,000	559,772,000	3,675,211,000		1,479,797,000		2,113,309,000
Interest Income											5,585,000		8,771,000		1,019,000
Other Income (Expense)											(8,450,000)		5,724,000		5,834,000
Net Interest Expense											235,460,000		213,552,000		210,363,000
Income (Loss) Before Income Taxes	919,082,000		721,555,000	1,035,230,000	761,019,000	(445,822,000)		560,189,000	646,239,000	520,134,000	3,436,886,000		1,280,740,000		1,909,799,000
Income Tax Provision (Benefit)	338,888,000		259,057,000	375,538,000	266,294,000	59,177,000		204,698,000	250,461,000	196,125,000	1,239,777,000		710,461,000		818,676,000
Additions to Oil and Gas Properties, Excluding Dry Hole Costs											6,622,436,000		6,720,346,000		6,241,167,000
Total Property, Plant and Equipment, Net	26,148,836,000					23,337,681,000					26,148,836,000		23,337,681,000		21,288,824,000
Total Assets	30,574,238,000					27,336,578,000					30,574,238,000		27,336,578,000		24,838,797,000
Percentage of revenues used to determine significant purchasers (in hundredths)											10.00%
United States [Member]
Schedule of Segment Reporting Information By Segment [Abstract]
Crude Oil and Condensate											8,035,358,000		5,383,612,000		3,458,248,000
Natural Gas Liquids											761,535,000		713,497,000		762,730,000
Natural Gas											1,100,808,000		951,463,000		1,593,964,000
(Losses) Gains on Mark-to-Market Commodity Derivative Contracts											(166,349,000)		393,744,000		626,053,000
Gathering, Processing and Marketing											3,636,209,000		3,091,281,000		2,115,768,000
Gains on Asset Dispositions, Net											93,876,000		166,201,000		475,878,000
Other, Net											51,713,000		40,780,000		32,329,000
Net Operating Revenues											13,513,150,000	[1]	10,740,578,000	[2]	9,064,970,000	[3]
Depreciation, Depletion and Amortization											3,223,596,000		2,780,563,000		2,131,706,000
Operating Income (Loss)											3,543,841,000		2,233,911,000		2,252,508,000
Interest Income											2,803,000		8,343,000		436,000
Other Income (Expense)											(29,696,000)		(12,455,000)		(6,480,000)
Net Interest Expense											283,209,000		242,138,000		214,360,000
Income (Loss) Before Income Taxes											3,233,739,000		1,987,661,000		2,032,104,000
Income Tax Provision (Benefit)											1,161,328,000		707,401,000		732,362,000
Additions to Oil and Gas Properties, Excluding Dry Hole Costs											6,133,894,000		6,198,267,000		5,790,590,000
Total Property, Plant and Equipment, Net	24,456,383,000					21,560,998,000					24,456,383,000		21,560,998,000		18,711,774,000
Total Assets	27,668,713,000					24,523,072,000					27,668,713,000		24,523,072,000		21,313,158,000
Amount of sales with a single significant purchaser in the United States segment											3,900,000,000		2,200,000,000
Amount of sales with a second significant purchaser in the United States segment.											2,000,000,000
Canada [Member]
Schedule of Segment Reporting Information By Segment [Abstract]
Crude Oil and Condensate											221,999,000		221,556,000		264,895,000
Natural Gas Liquids											12,435,000		13,680,000		16,634,000
Natural Gas											85,446,000		86,361,000		178,324,000
(Losses) Gains on Mark-to-Market Commodity Derivative Contracts											0		0		0
Gathering, Processing and Marketing											1,476,000		0		0
Gains on Asset Dispositions, Net											102,570,000		26,459,000		17,033,000
Other, Net											4,770,000		367,000		258,000
Net Operating Revenues											428,696,000		348,423,000		477,144,000
Depreciation, Depletion and Amortization											180,836,000		223,689,000		260,084,000
Operating Income (Loss)											(45,214,000)		(1,065,434,000)		(459,520,000)
Interest Income											2,076,000		123,000		342,000
Other Income (Expense)											7,707,000		(8,689,000)		(2,375,000)
Net Interest Expense											(4,204,000)		6,589,000		23,085,000
Income (Loss) Before Income Taxes											(31,227,000)		(1,080,589,000)		(484,638,000)
Income Tax Provision (Benefit)											598,000		(134,745,000)		(125,474,000)
Additions to Oil and Gas Properties, Excluding Dry Hole Costs											137,920,000		302,851,000		259,634,000
Total Property, Plant and Equipment, Net	602,333,000					877,996,000					602,333,000		877,996,000		1,760,066,000
Total Assets	880,765,000					1,202,031,000					880,765,000		1,202,031,000		2,131,949,000
Trinidad [Member]
Schedule of Segment Reporting Information By Segment [Abstract]
Crude Oil and Condensate											40,379,000		50,708,000		112,554,000
Natural Gas Liquids											0		0		0
Natural Gas											477,103,000		514,322,000		442,589,000
(Losses) Gains on Mark-to-Market Commodity Derivative Contracts											0		0		0
Gathering, Processing and Marketing											6,064,000		5,413,000		24,000
Gains on Asset Dispositions, Net											1,119,000		0		(2,000)
Other, Net											24,000		15,000		586,000
Net Operating Revenues											524,689,000		570,458,000		555,751,000
Depreciation, Depletion and Amortization											181,990,000		147,062,000		107,141,000
Operating Income (Loss)											266,329,000		371,876,000		383,992,000
Interest Income											336,000		125,000		101,000
Other Income (Expense)											9,889,000		20,482,000		18,755,000
Net Interest Expense											0		238,000		0
Income (Loss) Before Income Taxes											276,554,000		392,245,000		402,848,000
Income Tax Provision (Benefit)											118,270,000		140,468,000		204,698,000
Additions to Oil and Gas Properties, Excluding Dry Hole Costs											132,984,000		49,376,000		132,159,000
Total Property, Plant and Equipment, Net	476,174,000					535,405,000					476,174,000		535,405,000		627,794,000
Total Assets	986,796,000					1,012,727,000					986,796,000		1,012,727,000		1,085,664,000
Other International [Member]
Schedule of Segment Reporting Information By Segment [Abstract]
Crude Oil and Condensate											2,911,000	[4]	3,561,000	[4]	2,587,000	[4]
Natural Gas Liquids											0	[4]	0	[4]	0	[4]
Natural Gas											17,672,000	[4]	19,616,000	[4]	25,663,000	[4]
(Losses) Gains on Mark-to-Market Commodity Derivative Contracts											0	[4]	0	[4]	0	[4]
Gathering, Processing and Marketing											0	[4]	0	[4]	0	[4]
Gains on Asset Dispositions, Net											0	[4]	0	[4]	0	[4]
Other, Net											0	[4]	0	[4]	0	[4]
Net Operating Revenues											20,583,000	[4]	23,177,000	[4]	28,250,000	[4]
Depreciation, Depletion and Amortization											14,554,000	[4]	18,389,000	[4]	17,450,000	[4]
Operating Income (Loss)											(89,745,000)	[4]	(60,556,000)	[4]	(63,671,000)	[4]
Interest Income											370,000	[4]	180,000	[4]	140,000	[4]
Other Income (Expense)											3,650,000	[4]	6,386,000	[4]	(4,066,000)	[4]
Net Interest Expense											(43,545,000)	[4]	(35,413,000)	[4]	(27,082,000)	[4]
Income (Loss) Before Income Taxes											(42,180,000)	[4]	(18,577,000)	[4]	(40,515,000)	[4]
Income Tax Provision (Benefit)											(40,419,000)	[4]	(2,663,000)	[4]	7,090,000	[4]
Additions to Oil and Gas Properties, Excluding Dry Hole Costs											217,638,000	[4]	169,852,000	[4]	58,784,000	[4]
Total Property, Plant and Equipment, Net	613,946,000	[4]				363,282,000	[4]				613,946,000	[4]	363,282,000	[4]	189,190,000	[4]
Total Assets	$ 1,037,964,000	[4]				$ 598,748,000	[4]				$ 1,037,964,000	[4]	$ 598,748,000	[4]	$ 308,026,000	[4]

[1] EOG had sales activity with two significant purchasers in 2013, one totaling $3.9 billion and the other totaling $2.0 billion of consolidated Net Operating Revenues in the United States segment.

[2] EOG had sales activity with a single significant purchaser in the United States segment in 2012 that totaled $2.2 billion of consolidated Net Operating Revenues.

[3] EOG had no purchasers in 2011 whose sales totaled 10 percent or more of consolidated Net Operating Revenues.

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