Employee Benefit Plans (Tables) (USD $)
In Millions, unless otherwise specified

12 Months Ended

Dec. 31, 2014

Dec. 31, 2013

Employee Benefit Plans [Abstract]

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

tock-based compensation expense is included on the Consolidated Statements of Income and Comprehensive Income based upon the job functions of the employees receiving the grants.  Compensation expense related to EOG's stock-based compensation plans for the years ended December 31, 2014, 2013 and 2012 was as follows (in millions):

	2014		2013		2012
Lease and Well	$	41	$	35	$	35
Gathering and Processing Costs	1		1		1
Exploration Costs	27		27		27
General and Administrative	76		71		65
Total	$	145	$	134	$	128

Weighted Average Fair Values and Valuation Assumptions

Weighted average fair values and valuation assumptions used to value stock option, SAR and ESPP grants for the years ended December 31, 2014, 2013 and 2012 were as follows:

	Stock Options/SARs									ESPP
	2014			2013			2012			2014			2013			2012
Weighted Average Fair Value of Grants	$	30.75		$	27.35		$	18.98		$	21.65		$	15.06		$	12.56
Expected Volatility	35.28		%	35.86		%	39.68		%	25.03		%	29.89		%	40.92		%
Risk-Free Interest Rate	0.95		%	0.78		%	0.45		%	0.08		%	0.11		%	0.11		%
Dividend Yield	0.61		%	0.40		%	0.60		%	0.46		%	0.60		%	0.60		%
Expected Life	5.2 years			5.5 years			5.6 years			0.5 years			0.5 years			0.5 years

Schedule of Share Based Compensation Arrangement By Share Based Payment Award

The following table sets forth the stock option and SAR transactions for the years ended December 31, 2014, 2013 and 2012 (stock options and SARs in thousands):

	2014				2013				2012
	Number of Stock Options/ SARs		Weighted Average Grant Price		Number of Stock Options/ SARs		Weighted Average Grant Price		Number of Stock Options/ SARs		Weighted Average Grant Price
Outstanding at January 1	10,452		$	54.43	12,438		$	42.91	16,748		$	35.01
Granted	2,146		101.55		2,268		83.70		2,480		55.99
Exercised (1)	(1,718	)	45.68		(4,046	)	35.62		(6,492	)	27.40
Forfeited	(387	)	68.95		(208	)	50.78		(298	)	45.59
Outstanding at December 31	10,493		64.96		10,452		54.43		12,438		42.91
Stock Options/SARs Exercisable at December 31	5,287		49.40		4,638		43.95		6,286		37.49

(1) The total intrinsic value of stock options/SARs exercised during the years 2014, 2013 and 2012 was $95 million, $151 million and $185 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.

Subsidiary payment obligations guaranteed

$ 561

Stock Options and SARs Outstanding and Exercisable

The following table summarizes certain information for the stock options and SARs outstanding and exercisable at December 31, 2014 (stock options and SARs in thousands):

Stock Options/SARs Outstanding							Stock Options/SARs Exercisable
Range of Grant Prices	Stock Options/ SARs	Weighted Average Remaining Life (Years)	Weighted Average Grant Price		Aggregate Intrinsic Value(1)		Stock Options/ SARs	Weighted Average Remaining Life (Years)	Weighted Average Grant Price		Aggregate Intrinsic Value (1)
$22.00 to $  42.99	2,682	3	$	40.74			2,129	3	$	40.50
43.00 to     46.99	1,612	2	45.57				1,598	2	45.58
47.00 to   56.99	2,014	4	55.80				995	4	55.57
57.00 to    84.99	2,099	5	83.08				548	5	82.44
85.00 to   116.99	2,086	7	101.70				17	3	97.77
	10,493	4	64.96		$	304,679	5,287	3	49.40		$	225,692

(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.

ESPP Activity

At December 31, 2014, approximately 794,000 shares of Common Stock remained available for issuance under the ESPP.  The following table summarizes ESPP activities for the years ended December 31, 2014, 2013 and 2012 (in thousands, except number of participants):

	2014		2013		2012
Approximate Number of Participants	1,991		1,844		1,705
Shares Purchased	202		256		328
Aggregate Purchase Price	$	14,927	$	14,015	$	12,522

Restricted Stock and Restricted Stock Unit Transactions

The following table sets forth the restricted stock and restricted stock unit transactions for the years ended December 31, 2014, 2013 and 2012 (shares and units in thousands):

	2014				2013				2012
	Number of Shares and Units		Weighted Average Grant Date Fair Value		Number of Shares and Units		Weighted Average Grant Date Fair Value		Number of Shares and Units		Weighted Average Grant Date Fair Value
Outstanding at January 1	7,358		$	49.54	7,636		$	45.53	8,480		$	41.47
Granted	1,132		98.72		1,294		76.04		1,534		56.09
Released (1)	(2,761	)	105.24		(1,368	)	52.39		(2,118	)	36.35
Forfeited	(335	)	62.55		(204	)	48.55		(260	)	42.68
Outstanding at December 31 (2)	5,394		64.39		7,358		49.54		7,636		45.53

(1) The total intrinsic value of restricted stock and restricted stock units released during the years ended December 31, 2014, 2013 and 2012 was $291 million, $101 million and $120 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.

(2) The total intrinsic value of restricted stock and restricted stock units outstanding at December 31, 2014 and 2013 was approximately $497 million and $617 million, respectively.

Weighted Average Fair Values and Valuation Assumptions for Performance Units/Stocks

Weighted average fair values and valuation assumptions used to value performance unit and performance stock grants during the years ended December 31, 2014, 2013 and 2012 were as follows:

	2014			2013			2012
Weighted Average Fair Value of Grants	$	119.27		$	100.34		$	67.05
Expected Volatility	32.18		%	33.63		%	36.39		%
Risk-Free Interest Rate	1.18		%	0.79		%	0.39		%

Performance Unit and Performance Stock Transactions

The following table sets forth performance unit and performance stock transactions for the years ended December 31, 2014, 2013 and 2012 (shares and units in thousands):

	2014			2013			2012
	Number of Shares and Units	Weighted Average Grant Date Fair Value		Number of Shares and Units	Weighted Average Grant Date Fair Value		Number of Shares and Units	Weighted Average Grant Date Fair Value
Outstanding at January 1	261	$	82.18	142	$	67.05	—	—
Granted	72	119.27		119	100.34		142	67.05
Outstanding at December 31 (1)	333	$	90.17	261	$	82.18	142	$	67.05

(1) The total intrinsic value of performance units and performance stock outstanding at December 31, 2014 and 2013 was $30.7 million and $21.9 million, respectively.