Business Segment Information - Schedule of Selected Financial Information by Reportable Segment (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Jun. 30, 2021	Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020
Schedule of Segment Reporting Information By Segment [Abstract]
Gains (Losses) on Asset Dispositions, Net			$ 74		$ 17		$ (47)
Operating Revenues and Other			25,702	[1]	18,642	[2]	11,032	[3]
Depreciation, Depletion and Amortization			3,542		3,651		3,400
Operating Income (Loss)			9,966	[4]	6,102	[5]	(544)	[6]
Interest Income			85		3		12
Other Income (Expense)			29		6		(2)
Net Interest Expense (Income)			179		178		205
Income (Loss) Before Income Taxes			9,901		5,933		(739)
Income Tax Provision (Benefit)			2,142		1,269		(134)
Additions to Oil and Gas Properties, Excluding Dry Hole Costs			4,727		3,617
Total Property, Plant and Equipment, Net			29,429		28,426
Total Assets			41,371		38,236
Dry Hole Costs			45		71		13
Crude Oil and Condensate
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer			16,367		11,125		5,786
Natural Gas Liquids
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer			2,648		1,812		668
Natural Gas
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer			3,781		2,444		837
Gains (Losses) on Mark-to-Market Financial Commodity Derivative Contracts, Net
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue not from contract with customer			(3,982)		(1,152)		1,145
Gathering, Processing and Marketing
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer			6,696		4,288		2,583
Other, Net
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue not from contract with customer			118		108		60
United States
Schedule of Segment Reporting Information By Segment [Abstract]
Gains (Losses) on Asset Dispositions, Net			77		(40)		(47)
Operating Revenues and Other			25,394	[1]	18,265	[2]	10,795	[3]
Depreciation, Depletion and Amortization			3,469		3,558		3,324
Operating Income (Loss)			9,880	[4]	6,013	[5]	(546)	[6]
Interest Income			81		3		11
Other Income (Expense)			(17)		(14)		0
Net Interest Expense (Income)			179		178		205
Income (Loss) Before Income Taxes			9,765		5,824		(740)
Income Tax Provision (Benefit)			2,106		1,247		(157)
Additions to Oil and Gas Properties, Excluding Dry Hole Costs			4,599		3,557
Total Property, Plant and Equipment, Net			29,109		28,213
Total Assets			40,349		37,436
Amount of sales with a single significant purchaser in the United States segment			3,300		2,700		1,100
Amount of sales with a second significant purchaser in the United States segment.			3,100		2,600
Amount of sales with a third significant purchaser in the United States segment.			3,000
Pretax impairment charges							1,570
Pretax impairment charges For other assets							228
United States | Crude Oil and Condensate
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer			16,349		11,094		5,774
United States | Natural Gas Liquids
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer			2,648		1,812		668
United States | Natural Gas
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer			3,489		2,156		614
United States | Gains (Losses) on Mark-to-Market Financial Commodity Derivative Contracts, Net
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue not from contract with customer			(3,982)		(1,152)		1,145
United States | Gathering, Processing and Marketing
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer			6,695		4,287		2,581
United States | Other, Net
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue not from contract with customer			118		108		60
Trinidad
Schedule of Segment Reporting Information By Segment [Abstract]
Gains (Losses) on Asset Dispositions, Net			(4)		(2)		0
Operating Revenues and Other			307	[1]	300	[2]	182	[3]
Depreciation, Depletion and Amortization			73		87		60
Operating Income (Loss)			122	[4]	151	[5]	75	[6]
Interest Income			2		0		1
Other Income (Expense)			46		8		(2)
Net Interest Expense (Income)			0		0		0
Income (Loss) Before Income Taxes			170		159		74
Income Tax Provision (Benefit)			35		66		15
Additions to Oil and Gas Properties, Excluding Dry Hole Costs			122		55
Total Property, Plant and Equipment, Net			307		204
Total Assets			879		637
Trinidad | Crude Oil and Condensate
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer			18		31		11
Trinidad | Natural Gas Liquids
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer			0		0		0
Trinidad | Natural Gas
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer			292		270		169
Trinidad | Gains (Losses) on Mark-to-Market Financial Commodity Derivative Contracts, Net
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue not from contract with customer			0		0		0
Trinidad | Gathering, Processing and Marketing
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer			1		1		2
Trinidad | Other, Net
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue not from contract with customer			0		0		0
Other International
Schedule of Segment Reporting Information By Segment [Abstract]
Gains (Losses) on Asset Dispositions, Net		$ 58	1	[7]	59	[7]	0	[7]
Operating Revenues and Other	[7]		1	[1]	77	[2]	55	[3]
Depreciation, Depletion and Amortization	[7]		0		6		16
Operating Income (Loss)	[7]		(36)	[4]	(62)	[5]	(73)	[6]
Interest Income	[7]		2		0		0
Other Income (Expense)	[7]		0		12		0
Net Interest Expense (Income)	[7]		0		0		0
Income (Loss) Before Income Taxes	[7]		(34)		(50)		(73)
Income Tax Provision (Benefit)	[7]		1		(44)		8
Additions to Oil and Gas Properties, Excluding Dry Hole Costs	[7]		6		5
Total Property, Plant and Equipment, Net	[7]		13		9
Total Assets	[7]		143		163
Pretax impairment charges			15		45		81
Dry Hole Costs					42
Other International | Crude Oil and Condensate
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer	[7]		0		0		1
Other International | Natural Gas Liquids
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer	[7]		0		0		0
Other International | Natural Gas
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer	[7]		0		18		54
Other International | Gains (Losses) on Mark-to-Market Financial Commodity Derivative Contracts, Net
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue not from contract with customer	[7]		0		0		0
Other International | Gathering, Processing and Marketing
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer	[7]		0		0		0
Other International | Other, Net
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue not from contract with customer	[7]		$ 0		$ 0		$ 0

[1] EOG had sales activity with three significant purchasers in 2022, one totaling $3.3 billion, another totaling $3.1 billion and a third totaling $3.0 billion of consolidated Operating Revenues and Other in the United States segment.

[2] EOG had sales activity with two significant purchasers in 2021, one totaling $2.7 billion and the other totaling $2.6 billion of consolidated Operating Revenues and Other in the United States segment.

[3] EOG had sales activity with three significant purchasers in 2020, each totaling $1.1 billion of consolidated Operating Revenues and Other in the United States segment.

[4] EOG recorded pretax impairment charges of $15 million in 2022 for proved oil and gas properties and firm commitment contracts related to its decision to exit the Horn River Basin in British Columbia, Canada, in the Other International segment. See Note 14.

[5] EOG recorded pretax impairment charges of $45 million and dry hole costs of $42 million in 2021 in the Other International segment related to its decision in the fourth quarter of 2021 to exit Block 36 and Block 49 in Oman. In addition, EOG recorded net gains of asset dispositions of $58 million in 2021 in the Other International segment during the second quarter of 2021 due to the sale of its China operations. See Notes 14 and 17, respectively.

[6] EOG recorded pretax impairment charges of $1,570 million in 2020 for proved oil and gas properties, leasehold costs and other assets due to the decline in commodity prices and revisions of asset retirement obligations for certain properties in the United States segment. In addition, EOG recorded pretax impairment charges of $228 million in 2020 for owned and leased sand and crude-by-rail assets, also in the United States segment. EOG recorded pretax impairment charges of $81 million in 2020 for proved oil and gas properties and firm commitment contracts related to its decision to exit the Horn River Basin in British Columbia, Canada, in the Other International segment. See Notes 13 and 14.

[7] Other International primarily consists of EOG's China and Canada operations. The China operations were sold in the second quarter of 2021. EOG began exploration programs in Australia in the third quarter of 2021 and in Oman in the third quarter of 2020. The decision was reached in the fourth quarter of 2021 to exit Block 36 and Block 49 in Oman.