Oil and Gas Exploration and Production Industries Disclosures, Costs Incurred (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]
Acquisition Costs of Properties - Unproved		$ 276,092	[1]	$ 487,339	[2]	$ 426,540	[3]
Acquisition Costs of Properties - Proved		379,938	[4]	123,684	[5]	72,584	[6]
Subtotal		656,030		611,023		499,124
Exploration Costs		273,339		193,628		223,599
Development Costs		5,698,856	[7]	5,615,029	[8]	3,716,687	[9]
Total		6,628,225		6,419,680		4,439,410
Non-Cash Unproved Leasehold Acquisition Costs Related to Property Exchanges		98,000		291,000		256,000
Non-Cash Proved Property Acquisition Costs Related to Property Exchanges		52,000		71,000		26,000
United States
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]
Acquisition Costs of Properties - Unproved		276,092	[1]	486,081	[2]	424,118	[3]
Acquisition Costs of Properties - Proved		379,938	[4]	123,684	[5]	72,584	[6]
Subtotal		656,030		609,765		496,702
Exploration Costs		213,505		157,222		144,499
Development Costs		5,661,753	[7]	5,605,264	[8]	3,590,899	[9]
Total		6,531,288		6,372,251		4,232,100
Asset Retirement Costs Included In Development		181,000		90,000		50,000
Trinidad
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]
Acquisition Costs of Properties - Unproved		0	[1]	1,258	[2]	2,422	[3]
Acquisition Costs of Properties - Proved		0	[4]	0	[5]	0	[6]
Subtotal		0		1,258		2,422
Exploration Costs		46,616		22,511		62,547
Development Costs		25,007	[7]	(12,863)	[8]	109,491	[9]
Total		71,623		10,906		174,460
Asset Retirement Costs Included In Development		1,000		(12,000)		2,000
Other International
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]
Acquisition Costs of Properties - Unproved	[10]	0	[1]	0	[2]	0	[3]
Acquisition Costs of Properties - Proved	[10]	0	[4]	0	[5]	0	[6]
Subtotal	[10]	0		0		0
Exploration Costs	[10]	13,218		13,895		16,553
Development Costs	[10]	12,096	[7]	22,628	[8]	16,297	[9]
Total	[10]	25,314		36,523		32,850
Asset Retirement Costs Included In Development		$ 4,000		$ (8,000)		$ 4,000

[1] Includes non-cash unproved leasehold acquisition costs of $98 million related to property exchanges.

[2] Includes non-cash unproved leasehold acquisition costs of $291 million related to property exchanges.

[3] Includes non-cash unproved leasehold acquisition costs of $256 million related to property exchanges.

[4] Includes non-cash proved property acquisition costs of $52 million related to property exchanges.

[5] Includes non-cash proved property acquisition costs of $71 million related to property exchanges.

[6] Includes non-cash proved property acquisition costs of $26 million related to property exchanges.

[7] Includes Asset Retirement Costs of $181 million, $1 million and $4 million for the United States, Trinidad and Other International, respectively. Excludes other property, plant and equipment.

[8] Includes Asset Retirement Costs of $90 million, $(12) million and $(8) million for the United States, Trinidad and Other International, respectively. Excludes other property, plant and equipment.

[9] Includes Asset Retirement Costs of $50 million, $2 million and $4 million for the United States, Trinidad and Other International, respectively.  Excludes other property, plant and equipment.

[10] Other International primarily consists of EOG's United Kingdom, China and Canada operations. The United Kingdom operations were sold in the fourth quarter of 2018.