Oil and Gas Exploration and Production Industries Disclosures, Costs Incurred (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]
Acquisition Costs of Properties - Unproved		$ 426,540	[1]	$ 3,216,634	[2]	$ 133,857
Acquisition Costs of Properties - Proved		72,584	[3]	749,023	[4]	480,617
Subtotal		499,124		3,965,657		614,474
Exploration Costs		223,599		165,751		252,692
Development Costs		3,716,687	[5]	2,313,876	[6]	4,061,117	[7]
Total		4,439,410		6,445,284		4,928,283
Non-Cash Unproved Leasehold Acquisition Costs Related to Property Exchanges		256,000
Non-Cash Proved Property Acquisition Costs Related to Property Exchanges		26,000
Non-Cash Unproved Leasehold Acquisition Costs Related to Yates Transaction				3,102,000
Non-Cash Proved Property Acquisition Costs Related to Yates Transaction				732,000
United States
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]
Acquisition Costs of Properties - Unproved		424,118	[1]	3,216,598	[2]	133,801
Acquisition Costs of Properties - Proved		72,584	[3]	749,023	[4]	480,617
Subtotal		496,702		3,965,621		614,418
Exploration Costs		144,499		156,295		206,814
Development Costs		3,590,899	[5]	2,252,713	[6]	3,847,813	[7]
Total		4,232,100		6,374,629		4,669,045
Asset Retirement Costs Included In Development		50,000		25,000		32,000
Trinidad
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]
Acquisition Costs of Properties - Unproved		2,422	[1]	0		0
Acquisition Costs of Properties - Proved		0	[3]	0		0
Subtotal		2,422		0		0
Exploration Costs		62,547		2,695		22,837
Development Costs		109,491	[5]	72,147	[6]	102,715	[7]
Total		174,460		74,842		125,552
Asset Retirement Costs Included In Development		2,000		(3,000)		15,000
Other International
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]
Acquisition Costs of Properties - Unproved	[8]	0	[1]	36		56
Acquisition Costs of Properties - Proved	[8]	0	[3]	0		0
Subtotal	[8]	0		36		56
Exploration Costs	[8]	16,553		6,761		23,041
Development Costs	[8]	16,297	[5]	(10,984)	[6]	110,589	[7]
Total	[8]	32,850		(4,187)		133,686
Asset Retirement Costs Included In Development		$ 4,000		$ (42,000)		$ 6,000

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

[2] Includes non-cash unproved leasehold acquisition costs of $3,102 million related to the Yates transaction.

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

[4] Includes non-cash proved property acquisition costs of $732 million related to the Yates transaction.

[5] 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.

[6] Includes Asset Retirement Costs of $25 million, $(3) million and $(42) million for the United States, Trinidad and Other International, respectively. Excludes other property, plant and equipment.

[7] Includes Asset Retirement Costs of $32 million, $15 million and $6 million for the United States, Trinidad and Other International, respectively. Excludes other property, plant and equipment.

[8] 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.