Business Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Schedule of Segment Reporting Information By Segment [Abstract]
Crude Oil and Condensate										$ 4,317,341		$ 4,934,562		$ 9,742,480
Natural Gas Liquids										437,250		407,658		934,051
Natural Gas										742,152		1,061,038		1,916,386
Gains (Losses) on Mark-to-Market Commodity Derivative Contracts										(99,608)		61,924		834,273
Gathering, Processing and Marketing										1,966,259		2,253,135		4,046,316
Gains (Losses) on Asset Dispositions, Net										205,835		(8,798)		507,590
Other, Net										81,403		47,909		54,244
Net Operating Revenues		$ 2,402,039	$ 2,118,504	$ 1,775,740	$ 1,354,349	$ 1,796,761	$ 2,172,428	$ 2,469,701	$ 2,318,538	7,650,632	[1]	8,757,428	[2]	18,035,340	[3]
Depreciation, Depletion and Amortization										3,553,417		3,313,644		3,997,041
Operating Income (Loss)		(105,487)	(193,480)	(288,173)	(638,141)	(329,753)	(6,222,957)	39,626	(172,995)	(1,225,281)		(6,686,079)		5,241,823
Interest Income										2,619		3,469		2,239
Other Income (Expense)										(53,162)		(1,553)		(47,289)
Net Interest Expense										281,681		237,393		201,458
Income (Loss) Before Income Taxes		(194,010)	(272,250)	(380,277)	(710,968)	(398,826)	(6,274,921)	(11,478)	(236,331)	(1,557,505)		(6,921,556)		4,995,315
Income Tax Provision (Benefit)		(51,658)	$ (82,250)	$ (87,719)	$ (239,192)	(114,530)	$ (2,199,182)	$ (16,746)	$ (66,583)	(460,819)		(2,397,041)		2,079,828
Additions to Oil and Gas Properties, Excluding Dry Hole Costs										6,329,369		4,710,404		7,471,177
Total Property, Plant and Equipment, Net		25,707,078				24,210,721				25,707,078		24,210,721		29,172,644
Total Assets		29,459,433				26,970,470				29,459,433		26,970,470		34,758,599
United States
Schedule of Segment Reporting Information By Segment [Abstract]
Crude Oil and Condensate										4,265,036		4,917,731		9,526,149
Natural Gas Liquids										437,238		407,570		924,454
Natural Gas										475,715		637,452		1,321,175
Gains (Losses) on Mark-to-Market Commodity Derivative Contracts										(99,608)		61,924		834,273
Gathering, Processing and Marketing										1,967,390		2,254,477		4,040,024
Gains (Losses) on Asset Dispositions, Net										196,043		(12,176)		96,339
Other, Net										81,386		47,464		49,950
Net Operating Revenues										7,323,200	[1]	8,314,442	[2]	16,792,364	[3]
Depreciation, Depletion and Amortization										3,365,390		3,139,863		3,684,943
Operating Income (Loss)										(1,192,338)		(6,566,282)		5,074,911
Interest Income										358		1,913		849
Other Income (Expense)										(15,703)		6,461		(14,953)
Net Interest Expense										298,125		274,606		269,166
Income (Loss) Before Income Taxes										(1,505,808)		(6,832,514)		4,791,641
Income Tax Provision (Benefit)										(516,180)		(2,463,213)		1,837,185
Additions to Oil and Gas Properties, Excluding Dry Hole Costs										6,223,228		4,495,730		7,133,727
Total Property, Plant and Equipment, Net		25,221,517				23,593,995				25,221,517		23,593,995		28,391,741
Total Assets		27,907,083				25,347,134				27,907,083		25,347,134		32,867,310
Trinidad
Schedule of Segment Reporting Information By Segment [Abstract]
Crude Oil and Condensate										9,600		13,122		29,604
Natural Gas Liquids										0		0		0
Natural Gas										234,108		368,639		483,071
Gains (Losses) on Mark-to-Market Commodity Derivative Contracts										0		0		0
Gathering, Processing and Marketing										(1,131)		(1,342)		6,064
Gains (Losses) on Asset Dispositions, Net										(145)		393		0
Other, Net										(8)		(3)		37
Net Operating Revenues										242,424	[1]	380,809	[2]	518,776	[3]
Depreciation, Depletion and Amortization										145,591		154,853		188,592
Operating Income (Loss)										46,473		175,658		277,471
Interest Income										932		389		253
Other Income (Expense)										2,667		8,780		8,712
Net Interest Expense										0		1,400		0
Income (Loss) Before Income Taxes										50,072		183,427		286,436
Income Tax Provision (Benefit)										64,281		63,502		98,559
Additions to Oil and Gas Properties, Excluding Dry Hole Costs										75,407		102,358		76,138
Total Property, Plant and Equipment, Net		274,850				350,766				274,850		350,766		382,719
Total Assets		889,253				886,826				889,253		886,826		865,674
Other International
Schedule of Segment Reporting Information By Segment [Abstract]
Crude Oil and Condensate	[4]									42,705		3,709		186,727
Natural Gas Liquids	[4]									12		88		9,597
Natural Gas	[4]									32,329		54,947		112,140
Gains (Losses) on Mark-to-Market Commodity Derivative Contracts	[4]									0		0		0
Gathering, Processing and Marketing	[4]									0		0		228
Gains (Losses) on Asset Dispositions, Net	[4]									9,937		2,985		411,251
Other, Net	[4]									25		448		4,257
Net Operating Revenues	[4]									85,008	[1]	62,177	[2]	724,200	[3]
Depreciation, Depletion and Amortization	[4]									42,436		18,928		123,506
Operating Income (Loss)	[4]									(79,416)		(295,455)		(110,559)
Interest Income	[4]									1,329		1,167		1,137
Other Income (Expense)	[4]									(40,126)		(16,794)		(41,048)
Net Interest Expense	[4]									(16,444)		(38,613)		(67,708)
Income (Loss) Before Income Taxes	[4]									(101,769)		(272,469)		(82,762)
Income Tax Provision (Benefit)	[4]									(8,920)		2,670		144,084
Additions to Oil and Gas Properties, Excluding Dry Hole Costs	[4]									30,734		112,316		261,312
Total Property, Plant and Equipment, Net	[4]	210,711				265,960				210,711		265,960		398,184
Total Assets	[4]	$ 663,097				$ 736,510				$ 663,097		$ 736,510		$ 1,025,615

[1] EOG had sales activity with three significant purchasers in 2016, one totaling $1.2 billion, one totaling $1.1 billion and one totaling $1.0 billion of consolidated Net Operating Revenues in the United States segment.

[2] EOG had sales activity with two significant purchasers in 2015, one totaling $1.7 billion and the other totaling $1.4 billion of consolidated Net Operating Revenues in the United States segment.

[3] EOG had sales activity with two significant purchasers in 2014, one totaling $4.0 billion and the other totaling $3.0 billion of consolidated Net Operating Revenues in the United States segment.

[4] Other International primarily consists of EOG's United Kingdom, China, Canada and Argentina operations. The Argentina operations were sold in the third quarter of 2016.