Employee Benefit Plans (Details) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Stock based compensation by job function [Line Items]
Compensation expense related to the company's stock-based compensation plans	$ 134,467,000		$ 127,504,000		$ 128,205,000
Maximum shares of stock-based awards approved	28,400,000
Federal income tax (expense) / benefit recognized from stock-based compensation	56,000,000		67,000,000		25,000
Maximum term of stock options and SARs granted	10 years
Percentage of the fair market value at which employees may purchase company stock via the ESPP	0.85
Maximum Percentage Of Employee Pay Eligible For Contribution To Espp Percentage	10.00%
Term of ESPP offering period description	two six-month offering periods
Stock-based compensation expense related to stock options, SAR and ESPP grants	53,000,000		49,000,000		48,000,000
Stock Options/SARs and Employee Stock Purchase Plan (ESPP) Disclosures [Line Items]
Common Shares Available for Grant	16,600,000
Share-Based Compensation Arrangement By Share-Based Payment Award [Abstract]
Stock options/SARs vested or expected to vest (in shares)	5.0
Weighted average grant price for stock options/SARs vested or expected to vest (per share)	$ 108.03
Intrinsic value of stock options/SARs vested or expected to vest	300,000,000
Weighted Average Remaining Contractual Life for Stock Options/SARs Vested or Expected to Vest	4 years 6 months
Summary Information By Grant Price Range For Stock Options And SARs Outstanding And Exercisable At End Of Period [Line Items]
Stock Options and SARs Outstanding	5,226,000
Weighted Average Remaining Life for Outstanding Options and SARs	5 years
Weighted Average Grant Price For Outstanding Options and SARs	$ 108.86
Aggregate Intrinsic Value For Outstanding Options and SARs	309,422,000	[1]
Stock Options and SARs Exercisable	2,319,000
Weighted Average Remaining Life For Exercisable Units	3 years
Weighted Average Grant Price For Exercisable Options and SARs	$ 87.90
Aggregate Intrinsic Value For Exercisable Units	185,362,000	[1]
Grant Price Range 1 [Member]
Summary Information By Grant Price Range For Stock Options And SARs Outstanding And Exercisable At End Of Period [Line Items]
Upper range of grant price (in dollars per share)	$ 26.00
Lower range of grant price (in dollars per share)	$ 81.99
Stock Options and SARs Outstanding	764,000
Weighted Average Remaining Life for Outstanding Options and SARs	2 years
Weighted Average Grant Price For Outstanding Options and SARs	$ 77.08
Stock Options and SARs Exercisable	760,000
Weighted Average Remaining Life For Exercisable Units	2 years
Weighted Average Grant Price For Exercisable Options and SARs	$ 77.13
Grant Price Range 2 [Member]
Summary Information By Grant Price Range For Stock Options And SARs Outstanding And Exercisable At End Of Period [Line Items]
Upper range of grant price (in dollars per share)	$ 82.00
Lower range of grant price (in dollars per share)	$ 89.99
Stock Options and SARs Outstanding	1,380,000
Weighted Average Remaining Life for Outstanding Options and SARs	4 years
Weighted Average Grant Price For Outstanding Options and SARs	$ 84.82
Stock Options and SARs Exercisable	765,000
Weighted Average Remaining Life For Exercisable Units	3 years
Weighted Average Grant Price For Exercisable Options and SARs	$ 85.87
Grant Price Range 3 [Member]
Summary Information By Grant Price Range For Stock Options And SARs Outstanding And Exercisable At End Of Period [Line Items]
Upper range of grant price (in dollars per share)	$ 90.00
Lower range of grant price (in dollars per share)	$ 109.99
Stock Options and SARs Outstanding	837,000
Weighted Average Remaining Life for Outstanding Options and SARs	4 years
Weighted Average Grant Price For Outstanding Options and SARs	$ 93.39
Stock Options and SARs Exercisable	519,000
Weighted Average Remaining Life For Exercisable Units	4 years
Weighted Average Grant Price For Exercisable Options and SARs	$ 92.87
Grant Price Range 4 [Member]
Summary Information By Grant Price Range For Stock Options And SARs Outstanding And Exercisable At End Of Period [Line Items]
Upper range of grant price (in dollars per share)	$ 110.00
Lower range of grant price (in dollars per share)	$ 136.99
Stock Options and SARs Outstanding	1,154,000
Weighted Average Remaining Life for Outstanding Options and SARs	6 years
Weighted Average Grant Price For Outstanding Options and SARs	$ 113.22
Stock Options and SARs Exercisable	274,000
Weighted Average Remaining Life For Exercisable Units	5 years
Weighted Average Grant Price For Exercisable Options and SARs	$ 113.65
Grant Price Range 5 [Member]
Summary Information By Grant Price Range For Stock Options And SARs Outstanding And Exercisable At End Of Period [Line Items]
Upper range of grant price (in dollars per share)	$ 137.00
Lower range of grant price (in dollars per share)	$ 178.99
Stock Options and SARs Outstanding	1,091,000
Weighted Average Remaining Life for Outstanding Options and SARs	7 years
Weighted Average Grant Price For Outstanding Options and SARs	$ 168.77
Stock Options and SARs Exercisable	1,000
Weighted Average Remaining Life For Exercisable Units	1 year
Weighted Average Grant Price For Exercisable Options and SARs	$ 168.86
Stock Options and SARS [Member]
Weighted Average Fair Value And Valuation Assumptions Used To Value Stock-Based Compensation [Abstract]
Weighted Average Fair Value of Grants	$ 54.70		$ 37.95		$ 29.92
Expected Volatility (in hundredths)	35.86%		39.68%		40.96%
Risk-Free Interest Rate (in hundredths)	0.78%		0.45%		0.58%
Dividend Yield (in hundredths)	0.40%		0.60%		0.70%
Expected Life (in years)	5 years 6 months		5 years 7 months 6 days		5 years 6 months
Stock option and SAR Rollforward [Abstract]
Outstanding at January 1 (in shares)	6,219,000		8,374,000		8,445,000
Granted (in shares)	1,134,000		1,240,000		1,509,000
Exercised (in shares)	(2,023,000)	[2]	(3,246,000)	[2]	(1,399,000)	[2]
Forfeited (in shares)	(104,000)		(149,000)		(181,000)
Outstanding at December 31 (in shares)	5,226,000		6,219,000		8,374,000
Share-Based Compensation Arrangement By Share-Based Payment Award [Abstract]
Outstanding at January 1 (in dollars per share)	$ 85.81		$ 70.01		$ 64.49
Granted (in dollars per share)	$ 167.40		$ 111.97		$ 85.29
Exercised (in dollars per share)	$ 71.23	[2]	$ 54.80	[2]	$ 50.86	[2]
Forfeited (in dollars per share)	$ 101.56		$ 91.18		$ 87.74
Outstanding at December 31 (in dollars per share)	$ 108.86		$ 85.81		$ 70.01
Stock Options/SARs Exercisable at December 31 (in shares)	2,319,000		3,143,000		5,148,000
Stock Options/SARs Exercisable at December 31 (in dollars per share)	$ 87.90		$ 74.98		$ 59.19
Intrinsic value of stock options/SARs exercised during the period	151,000,000		185,000,000		78,000,000
Unrecognized compensation expense	103,000,000
Weighted average period over which unrecognized compensation expense will be recognized	2 years 8 months 12 days
ESPP [Member]
Stock Options/SARs and Employee Stock Purchase Plan (ESPP) Disclosures [Line Items]
Common Shares Available for Grant	498,000
Weighted Average Fair Value And Valuation Assumptions Used To Value Stock-Based Compensation [Abstract]
Weighted Average Fair Value of Grants	$ 30.12		$ 25.11		$ 22.75
Expected Volatility (in hundredths)	29.89%		40.92%		29.82%
Risk-Free Interest Rate (in hundredths)	0.11%		0.11%		0.14%
Dividend Yield (in hundredths)	0.60%		0.60%		0.70%
Expected Life (in years)	0 years 6 months		0 years 6 months		0 years 6 months
Share-Based Compensation Arrangement By Share-Based Payment Award [Abstract]
Approximate Number of Participants	1,844		1,705		1,525
Shares Purchased	128,000		164,000		135,000
Aggregate Purchase Price	14,015,000		12,522,000		10,947,000
Restricted Stock And Restricted Stock Units [Member]
Share-Based Compensation Arrangement By Share-Based Payment Award [Abstract]
Vesting period	5 years
Unrecognized compensation expense	154,000,000
Weighted average period over which unrecognized compensation expense will be recognized	2 years 4 months 24 days
Share Based Compensation Arrangement By Restricted Stock And Restricted Stock Units Compensation Cost	72,000,000		72,000,000		80,000,000
Number of Shares and Units [Roll Forward]
Outstanding at January 1 (in shares)	3,818,000	[3]	4,240,000	[3]	4,009,000
Granted (in shares)	647,000		767,000		932,000
Released (in shares)	(684,000)	[4]	(1,059,000)	[4]	(457,000)	[4]
Forfeited (in shares)	(102,000)		(130,000)		(244,000)
Outstanding at December 31 (in shares)	3,679,000	[3]	3,818,000	[3]	4,240,000	[3]
Weighted Average Grant Fair Value [Abstract]
Outstanding at January 1 (in dollars per share)	$ 91.06	[3]	$ 82.93	[3]	$ 79.13
Granted (in dollars per share)	$ 152.07		$ 112.17		$ 90.87
Released (in dollars per share)	$ 104.78	[4]	$ 72.70	[4]	$ 66.10	[4]
Forfeited (in dollars per share)	$ 97.10		$ 85.36		$ 82.45
Outstanding at December 31 (in dollars per share)	$ 99.08	[3]	$ 91.06	[3]	$ 82.93	[3]
Intrinsic value of stock based compensation	101,000,000		120,000,000		44,000,000
Aggregate Intrinsic Value Of Restricted Stock And Restricted Stock Units	617,000,000		461,000,000
Performance Units and Performance Stock [Member]
Weighted Average Fair Value And Valuation Assumptions Used To Value Stock-Based Compensation [Abstract]
Weighted Average Fair Value of Grants	$ 200.68		$ 134.09
Expected Volatility (in hundredths)	33.63%		36.39%
Risk-Free Interest Rate (in hundredths)	0.79%		0.39%
Share-Based Compensation Arrangement By Share-Based Payment Award [Abstract]
Vesting period	5 years
Unrecognized compensation expense	6,000,000
Weighted average period over which unrecognized compensation expense will be recognized	2 years 4 months 24 days
Number of Shares and Units [Roll Forward]
Outstanding at January 1 (in shares)	71,000	[5]	0
Granted (in shares)	60,000		71,000
Released (in shares)	0		0
Forfeited (in shares)	0		0
Outstanding at December 31 (in shares)	131,000	[5]	71,000	[5]
Weighted Average Grant Fair Value [Abstract]
Outstanding at January 1 (in dollars per share)	$ 134.09	[5]	$ 0
Granted (in dollars per share)	$ 200.68		$ 134.09
Released (in dollars per share)	$ 0		$ 0
Forfeited (in dollars per share)	$ 0		$ 0
Outstanding at December 31 (in dollars per share)	$ 164.36	[5]	$ 134.09	[5]
Intrinsic value of stock based compensation	21,900,000		8,600,000
Performance Units and Performance Stock [Abstract]
Minimum Performance Units and Stock Allowed to be Outstanding	0
Maximum performance units and stock allowed to be outstanding	261,390
Share Based Compensation Arrangement By Performance Units and Stock Compensation Cost	9,000,000		7,000,000
Term of Zero-Coupon Risk-Free Interest Rate Derived from the Treasury Constant Maturities Yield Curve	3 years 3 months 4 days
Performance Period for Performance Units and Stock	3 years
Lease And Well [Member]
Stock based compensation by job function [Line Items]
Compensation expense related to the company's stock-based compensation plans	35,000,000		35,000,000		33,000,000
Gathering And Processing Costs [Member]
Stock based compensation by job function [Line Items]
Compensation expense related to the company's stock-based compensation plans	1,000,000		1,000,000		1,000,000
Exploration Costs [Member]
Stock based compensation by job function [Line Items]
Compensation expense related to the company's stock-based compensation plans	27,000,000		27,000,000		26,000,000
General And Administrative [Member]
Stock based compensation by job function [Line Items]
Compensation expense related to the company's stock-based compensation plans	71,000,000		65,000,000		68,000,000
Pension Plans Defined Benefit and Contribution [Member]
Defined Benefit and Defined Contribution Plan Disclosure [Line Items]
Total pension plan costs	37,000,000		36,000,000		27,000,000
Company contributions to foreign pension plans	4,000,000		3,000,000		3,000,000
Benefit obligation	13,000,000		14,000,000
Fair value of foreign pension plan assets	11,000,000		10,000,000
Accrued benefit cost	$ 1,000,000		$ 2,000,000

[1] Based upon the difference between the closing market price of the Common Stock on the last trading day of the year and the grant price of in-the-money stock options and SARs.

[2] The total intrinsic value of stock options/SARs exercised during the years 2013, 2012 and 2011 was $151 million, $185 million and $78 million, respectively. The intrinsic value is based upon the difference between the market price of the Common Stock on the date of exercise and the grant price of the stock options/SARs.

[3] The aggregate intrinsic value of restricted stock and restricted stock units outstanding at December 31, 2013 and 2012 was approximately $617 million and $461 million, respectively.

[4] The total intrinsic value of restricted stock and restricted stock units released during the years ended December 31, 2013, 2012 and 2011 was $101 million, $120 million and $44 million, respectively. The intrinsic value is based upon the closing price of EOG's common stock on the date restricted stock and restricted stock units are released.

[5] The total intrinsic value of performance units and performance stock outstanding at December 31, 2013 and 2012 was $21.9 million and $8.6 million, respectively.