Oil and Gas Exploration and Production Industries Disclosures, Costs Incurred (Details) (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]
Acquisition Costs of Properties - Unproved	$ 370,414,000		$ 414,121,000		$ 505,303,000
Acquisition Costs of Properties - Proved	139,101,000		120,214,000		739,000
Subtotal	509,515,000		534,335,000		506,042,000
Exploration Costs	395,973,000		377,179,000		445,598,000
Development Costs	6,999,281,000		6,086,377,000		6,116,550,000
Total	7,904,769,000		6,997,891,000		7,068,190,000
United States [Member]
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]
Acquisition Costs of Properties - Unproved	365,915,000		411,556,000		471,345,000
Acquisition Costs of Properties - Proved	138,772,000		120,220,000		739,000
Subtotal	504,687,000		531,776,000		472,084,000
Exploration Costs	332,703,000		273,788,000		333,534,000
Development Costs	6,638,192,000	[1]	5,573,260,000	[2]	5,657,378,000	[3]
Total	7,475,582,000		6,378,824,000		6,462,996,000
Asset Retirement Costs Included In Development	149,000,000		84,000,000		80,000,000
Canada [Member]
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]
Acquisition Costs of Properties - Unproved	4,499,000		2,565,000		33,561,000
Acquisition Costs of Properties - Proved	349,000		(6,000)		0
Subtotal	4,848,000		2,559,000		33,561,000
Exploration Costs	13,010,000		19,660,000		38,530,000
Development Costs	101,634,000	[1]	149,426,000	[2]	278,995,000	[3]
Total	119,492,000		171,645,000		351,086,000
Asset Retirement Costs Included In Development	31,000,000		13,000,000		33,000,000
Trinidad [Member]
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]
Acquisition Costs of Properties - Unproved	0		0		1,000,000
Acquisition Costs of Properties - Proved	0		0		0
Subtotal	0		0		1,000,000
Exploration Costs	2,794,000		16,060,000		19,555,000
Development Costs	89,555,000	[1]	124,231,000	[2]	32,609,000	[3]
Total	92,349,000		140,291,000		53,164,000
Asset Retirement Costs Included In Development	14,000,000				2,000,000
Other International [Member]
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]
Acquisition Costs of Properties - Unproved	0	[4]	0	[4]	(603,000)	[4]
Acquisition Costs of Properties - Proved	(20,000)	[4]	0	[4]	0	[4]
Subtotal	(20,000)	[4]	0	[4]	(603,000)	[4]
Exploration Costs	47,466,000	[4]	67,671,000	[4]	53,979,000	[4]
Development Costs	169,900,000	[1],[4]	239,460,000	[2],[4]	147,568,000	[3],[4]
Total	217,346,000	[4]	307,131,000	[4]	200,944,000	[4]
Asset Retirement Costs Included In Development	$ 2,000,000		$ 37,000,000		$ 12,000,000

[1] Includes Asset Retirement Costs of $149 million, $31 million, $14 million and $2 million for the United States, Canada, Trinidad and Other International, respectively. Excludes other property, plant and equipment.

[2] Includes Asset Retirement Costs of $84 million, $13 million and $37 million for the United States, Canada and Other International, respectively. Excludes other property, plant and equipment.

[3] Includes Asset Retirement Costs of $80 million, $33 million, $2 million and $12 million for the United States, Canada, Trinidad and Other International, respectively. Excludes other property, plant and equipment.

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