Oil and Gas Exploration and Production Industries Disclosures, Discounted Future Net Cash Flows (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items]
Future cash inflows	$ 123,999,499	[1]	$ 94,612,613	[2]	$ 92,530,537	[3]
Future production costs	(50,166,488)		(37,184,832)		(36,060,590)
Future development costs	(18,549,351)		(17,031,731)		(15,528,581)
Future income taxes	(16,416,387)		(11,150,742)		(11,418,085)
Future net cash flows	38,867,273		29,245,308		29,523,281
Discount to present value at 10% annual rate	(17,533,841)		(12,329,836)		(13,298,000)
Standardized measure of discounted future net cash flows relating to proved oil and gas reserves	21,333,432		16,915,472		16,225,281
Increase (Decrease) in Standardized Measure of Discounted Future Net Cash Flow Relating to Proved Oil and Gas Reserves [Roll Forward]
Balance at Beginning of Period	16,915,472		16,225,281		12,391,824
Sales and transfers of oil and gas produced, net of production costs	(8,196,380)		(5,888,317)		(5,095,655)
Net changes in prices and production costs	1,257,853		(301,232)		993,661
Extensions, discoveries, additions and improved recovery, net of related costs	5,483,432		6,082,122		6,348,691
Development costs incurred	2,955,900		2,094,600		1,545,500
Revisions of estimated development cost	990,396		2,341,476		(160,990)
Revisions of previous quantity estimates	1,794,198		(3,742,827)		(609,297)
Accretion of discount	2,133,729		2,077,217		1,577,962
Net change in income taxes	(2,578,250)		125,065		(1,159,105)
Purchases of reserves in place	66,359		69,940		5,241
Sales of reserves in place	(140,652)		(913,761)		(658,468)
Changes in timing and other	651,375		(1,254,092)		1,045,917
Balance at End of Period	21,333,432		16,915,472		16,225,281
United States [Member]
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items]
Future cash inflows	119,644,713	[1]	89,324,274	[2]	84,518,638	[3]
Future production costs	(49,099,393)		(35,892,997)		(33,294,343)
Future development costs	(17,753,860)		(15,825,040)		(13,811,449)
Future income taxes	(15,763,089)		(10,247,007)		(10,539,182)
Future net cash flows	37,028,371		27,359,230		26,873,664
Discount to present value at 10% annual rate	(17,451,470)		(12,177,896)		(12,498,010)
Standardized measure of discounted future net cash flows relating to proved oil and gas reserves	19,576,901		15,181,334		14,375,654
Per unit price used to calculate future cash inflows - Crude Oil	$ 105.91		$ 99.78		$ 97.75
Per unit price used to calculate future cash inflows - Natural Gas Liquids	$ 29.42		$ 36.95		$ 51.77
Per unit price used to calculate future cash inflows - Natural Gas	$ 3.50		$ 2.63		$ 4.03
Increase (Decrease) in Standardized Measure of Discounted Future Net Cash Flow Relating to Proved Oil and Gas Reserves [Roll Forward]
Balance at Beginning of Period	15,181,334		14,375,654		10,628,924
Sales and transfers of oil and gas produced, net of production costs	(7,561,343)		(5,192,392)		(4,296,926)
Net changes in prices and production costs	1,734,058		(393,585)		716,682
Extensions, discoveries, additions and improved recovery, net of related costs	5,449,531		5,517,945		6,223,552
Development costs incurred	2,792,400		2,042,300		1,422,500
Revisions of estimated development cost	892,803		1,987,330		(210,919)
Revisions of previous quantity estimates	1,887,062		(3,286,943)		(482,496)
Accretion of discount	1,895,503		1,832,377		1,352,740
Net change in income taxes	(2,772,267)		174,418		(1,049,641)
Purchases of reserves in place	66,359		64,317		5,241
Sales of reserves in place	(140,652)		(869,534)		(658,468)
Changes in timing and other	152,113		(1,070,553)		724,465
Balance at End of Period	19,576,901		15,181,334		14,375,654
Canada [Member]
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items]
Future cash inflows	1,199,251	[1]	1,816,369	[2]	5,056,501	[3]
Future production costs	(540,188)		(751,113)		(2,315,110)
Future development costs	(529,788)		(813,061)		(1,566,917)
Future income taxes	0		0		(81,590)
Future net cash flows	129,275		252,195		1,092,884
Discount to present value at 10% annual rate	202,379		146,954		(456,537)
Standardized measure of discounted future net cash flows relating to proved oil and gas reserves	331,654		399,149		636,347
Per unit price used to calculate future cash inflows - Crude Oil	$ 91.47		$ 84.77		$ 90.70
Per unit price used to calculate future cash inflows - Natural Gas Liquids	$ 40.88		$ 47.80		$ 46.97
Per unit price used to calculate future cash inflows - Natural Gas	$ 2.95		$ 2.22		$ 3.28
Increase (Decrease) in Standardized Measure of Discounted Future Net Cash Flow Relating to Proved Oil and Gas Reserves [Roll Forward]
Balance at Beginning of Period	399,149		636,347		746,235
Sales and transfers of oil and gas produced, net of production costs	(155,239)		(159,577)		(278,910)
Net changes in prices and production costs	(438,982)		(67,964)		(57,545)
Extensions, discoveries, additions and improved recovery, net of related costs	33,901		79,529		22,591
Development costs incurred	95,400		23,600		48,200
Revisions of estimated development cost	48,906		383,215		64,001
Revisions of previous quantity estimates	(23,915)		(396,408)		(70,718)
Accretion of discount	39,915		63,635		62,725
Net change in income taxes	0		0		(118,988)
Purchases of reserves in place	0		0		0
Sales of reserves in place	0		(44,227)		0
Changes in timing and other	332,519		(119,001)		218,756
Balance at End of Period	331,654		399,149		636,347
Trinidad [Member]
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items]
Future cash inflows	2,082,195	[1]	2,408,116	[2]	2,851,545	[3]
Future production costs	(315,483)		(342,113)		(388,199)
Future development costs	(112,050)		(171,737)		(149,884)
Future income taxes	(603,786)		(691,109)		(794,856)
Future net cash flows	1,050,876		1,203,157		1,518,606
Discount to present value at 10% annual rate	(174,236)		(242,087)		(334,399)
Standardized measure of discounted future net cash flows relating to proved oil and gas reserves	876,640		961,070		1,184,207
Per unit price used to calculate future cash inflows - Crude Oil	$ 94.30		$ 94.46		$ 92.50
Per unit price used to calculate future cash inflows - Natural Gas	$ 3.71		$ 3.61		$ 3.37
Increase (Decrease) in Standardized Measure of Discounted Future Net Cash Flow Relating to Proved Oil and Gas Reserves [Roll Forward]
Balance at Beginning of Period	961,070		1,184,207		988,866
Sales and transfers of oil and gas produced, net of production costs	(473,544)		(526,134)		(504,205)
Net changes in prices and production costs	(12,050)		162,600		331,196
Extensions, discoveries, additions and improved recovery, net of related costs	0		0		102,548
Development costs incurred	67,100		23,500		74,800
Revisions of estimated development cost	(3,539)		(28,835)		(14,074)
Revisions of previous quantity estimates	(60,419)		(62,285)		(56,884)
Accretion of discount	147,099		178,298		159,715
Net change in income taxes	56,373		88,853		9,511
Purchases of reserves in place	0		0		0
Sales of reserves in place	0		0		0
Changes in timing and other	194,550		(59,134)		92,734
Balance at End of Period	876,640		961,070		1,184,207
Other International (1) [Member]
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items]
Future cash inflows	1,073,340	[1],[4]	1,063,854	[2],[4]	103,853	[3],[4]
Future production costs	(211,424)	[4]	(198,609)	[4]	(62,938)	[4]
Future development costs	(153,653)	[4]	(221,893)	[4]	(331)	[4]
Future income taxes	(49,512)	[4]	(212,626)	[4]	(2,457)	[4]
Future net cash flows	658,751	[4]	430,726	[4]	38,127	[4]
Discount to present value at 10% annual rate	(110,514)	[4]	(56,807)	[4]	(9,054)	[4]
Standardized measure of discounted future net cash flows relating to proved oil and gas reserves	548,237	[4]	373,919	[4]	29,073	[4]
Per unit price used to calculate future cash inflows - Crude Oil	$ 107.36		$ 109.94		$ 102.86
Per unit price used to calculate future cash inflows - Natural Gas	$ 5.67		$ 5.04		$ 5.07
Increase (Decrease) in Standardized Measure of Discounted Future Net Cash Flow Relating to Proved Oil and Gas Reserves [Roll Forward]
Balance at Beginning of Period	373,919		29,073		27,799
Sales and transfers of oil and gas produced, net of production costs	(6,254)		(10,214)		(15,614)
Net changes in prices and production costs	(25,173)		(2,283)		3,328
Extensions, discoveries, additions and improved recovery, net of related costs	0		484,648		0
Development costs incurred	1,000		5,200		0
Revisions of estimated development cost	52,226		(234)		2
Revisions of previous quantity estimates	(8,530)		2,809		801
Accretion of discount	51,212		2,907		2,782
Net change in income taxes	137,644		(138,206)		13
Purchases of reserves in place	0		5,623		0
Sales of reserves in place	0		0		0
Changes in timing and other	(27,807)		(5,404)		9,962
Balance at End of Period	$ 548,237		$ 373,919		$ 29,073

[1] Estimated crude oil prices used to calculate 2013 future cash inflows for the United States, Canada, Trinidad and Other International were $105.91, $91.47, $94.30 and $107.36, respectively. Estimated NGLs prices used to calculate 2013 future cash inflows for the United States and Canada were $29.42 and $40.88, respectively. Estimated natural gas prices used to calculate 2013 future cash inflows for the United States, Canada, Trinidad and Other International were $3.50, $2.95, $3.71 and $5.67, respectively.

[2] Estimated crude oil prices used to calculate 2012 future cash inflows for the United States, Canada, Trinidad and Other International were $99.78, $84.77, $94.46 and $109.94, respectively. Estimated NGLs prices used to calculate 2012 future cash inflows for the United States and Canada were $36.95 and $47.80, respectively. Estimated natural gas prices used to calculate 2012 future cash inflows for the United States, Canada, Trinidad and Other International were $2.63, $2.22, $3.61, and $5.04, respectively.

[3] Estimated crude oil prices used to calculate 2011 future cash inflows for the United States, Canada, Trinidad and Other International were $97.75, $90.70, $92.50 and $102.86, respectively. Estimated NGLs prices used to calculate 2011 future cash inflows for the United States and Canada were $51.77 and $46.97, respectively. Estimated natural gas prices used to calculate 2011 future cash inflows for the United States, Canada, Trinidad and Other International were $4.03, $3.28, $3.37 and $5.07, respectively.

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