Oil and Gas Exploration and Production Industries Disclosures, Results Of Operations (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Results of Operations for Oil and Gas Producing Activities, by Geographic Area [Line Items]
Crude Oil and Condensate, Natural Gas Liquids and Natural Gas Revenues	$ 12,592,917		$ 10,755,646		$ 7,958,376
Other	54,244		56,507		41,162
Total	12,647,161		10,812,153		7,999,538
Exploration Costs	184,388		161,346		185,569
Dry Hole Costs	48,490		74,655		14,970
Transportation Costs	972,176		853,044		601,431
Production Costs	2,150,027		1,706,222		1,468,628
Impairments	743,575		286,941		1,270,735
Depreciation, Depletion and Amortization	3,881,720		3,498,010		3,024,514
Income (Loss) Before Income Taxes	4,666,785		4,231,935		1,433,691
Income Tax Provision (Benefit)	1,821,104		1,490,532		722,906
Results of Operations	2,845,681		2,741,403		710,785
United States [Member]
Results of Operations for Oil and Gas Producing Activities, by Geographic Area [Line Items]
Crude Oil and Condensate, Natural Gas Liquids and Natural Gas Revenues	11,771,777	[1]	9,897,701	[1]	7,048,572	[1]
Other	49,950	[1]	51,713	[1]	40,780	[1]
Total	11,821,727	[1]	9,949,414	[1]	7,089,352	[1]
Exploration Costs	162,434	[1]	141,286	[1]	162,152	[1]
Dry Hole Costs	25,408	[1]	14,276	[1]	1,772	[1]
Transportation Costs	957,522	[1]	841,567	[1]	591,547	[1]
Production Costs	1,940,074	[1]	1,494,791	[1]	1,264,633	[1]
Impairments	331,792	[1]	178,718	[1]	294,172	[1]
Depreciation, Depletion and Amortization	3,571,313	[1]	3,122,858	[1]	2,637,500	[1]
Income (Loss) Before Income Taxes	4,833,184	[1]	4,155,918	[1]	2,137,576	[1]
Income Tax Provision (Benefit)	1,722,914	[1]	1,486,445	[1]	761,459	[1]
Results of Operations	3,110,270	[1]	2,669,473	[1]	1,376,117	[1]
Canada [Member]
Results of Operations for Oil and Gas Producing Activities, by Geographic Area [Line Items]
Crude Oil and Condensate, Natural Gas Liquids and Natural Gas Revenues	290,291	[1]	319,880	[1]	321,597	[1]
Other	4,257	[1]	4,770	[1]	367	[1]
Total	294,548	[1]	324,650	[1]	321,964	[1]
Exploration Costs	11,877	[1]	11,203	[1]	13,350	[1]
Dry Hole Costs	0	[1]	9,579	[1]	1,570	[1]
Transportation Costs	12,618	[1]	9,694	[1]	7,511	[1]
Production Costs	158,882	[1]	154,947	[1]	154,509	[1]
Impairments	15,879	[1]	84,934	[1]	976,563	[1]
Depreciation, Depletion and Amortization	104,462	[1]	179,520	[1]	222,366	[1]
Income (Loss) Before Income Taxes	(9,170)	[1]	(125,227)	[1]	(1,053,905)	[1]
Income Tax Provision (Benefit)	(2,360)	[1]	(32,295)	[1]	(136,105)	[1]
Results of Operations	(6,810)	[1]	(92,932)	[1]	(917,800)	[1]
Trinidad [Member]
Results of Operations for Oil and Gas Producing Activities, by Geographic Area [Line Items]
Crude Oil and Condensate, Natural Gas Liquids and Natural Gas Revenues	512,675	[1]	517,482	[1]	565,030	[1]
Other	37	[1]	24	[1]	15	[1]
Total	512,712	[1]	517,506	[1]	565,045	[1]
Exploration Costs	2,185	[1]	2,345	[1]	2,262	[1]
Dry Hole Costs	0	[1]	4,478	[1]	0	[1]
Transportation Costs	617	[1]	659	[1]	1,104	[1]
Production Costs	38,301	[1]	43,279	[1]	37,792	[1]
Impairments	0	[1]	14,274	[1]	0	[1]
Depreciation, Depletion and Amortization	188,250	[1]	181,637	[1]	146,690	[1]
Income (Loss) Before Income Taxes	283,359	[1]	270,834	[1]	377,197	[1]
Income Tax Provision (Benefit)	74,588	[1]	103,313	[1]	119,442	[1]
Results of Operations	208,771	[1]	167,521	[1]	257,755	[1]
Other International [Member]
Results of Operations for Oil and Gas Producing Activities, by Geographic Area [Line Items]
Crude Oil and Condensate, Natural Gas Liquids and Natural Gas Revenues	18,174	[1],[2]	20,583	[1],[2]	23,177	[1],[2]
Other	0	[1],[2]	0	[1],[2]	0	[1],[2]
Total	18,174	[1],[2]	20,583	[1],[2]	23,177	[1],[2]
Exploration Costs	7,892	[1],[2]	6,512	[1],[2]	7,805	[1],[2]
Dry Hole Costs	23,082	[1],[2]	46,322	[1],[2]	11,628	[1],[2]
Transportation Costs	1,419	[1],[2]	1,124	[1],[2]	1,269	[1],[2]
Production Costs	12,770	[1],[2]	13,205	[1],[2]	11,694	[1],[2]
Impairments	395,904	[1],[2]	9,015	[1],[2]	0	[1],[2]
Depreciation, Depletion and Amortization	17,695	[1],[2]	13,995	[1],[2]	17,958	[1],[2]
Income (Loss) Before Income Taxes	(440,588)	[1],[2]	(69,590)	[1],[2]	(27,177)	[1],[2]
Income Tax Provision (Benefit)	25,962	[1],[2]	(66,931)	[1],[2]	(21,890)	[1],[2]
Results of Operations	$ (466,550)	[1],[2]	$ (2,659)	[1],[2]	$ (5,287)	[1],[2]

[1] Excludes gains or losses on the mark-to-market of financial commodity derivative contracts, gains or losses on sales of reserves and related assets, interest charges and general corporate expenses for each of the three years in the period ended December 31, 2014.

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