Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2015

Employee Benefit Plans [Abstract]

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

Stock-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, 2015, 2014 and 2013 was as follows (in millions):

	2015		2014		2013
Lease and Well	$	44	$	41	$	35
Gathering and Processing Costs	1		1		1
Exploration Costs	26		27		27
General and Administrative	60		76		71
Total	$	131	$	145	$	134

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, 2015, 2014 and 2013 were as follows:

	Stock Options/SARs									ESPP
	2015			2014			2013			2015			2014			2013
Weighted Average Fair Value of Grants	$	21.88		$	30.75		$	27.35		$	21.21		$	21.65		$	15.06
Expected Volatility	38.03		%	35.28		%	35.86		%	32.08		%	25.03		%	29.89		%
Risk-Free Interest Rate	0.83		%	0.95		%	0.78		%	0.12		%	0.08		%	0.11		%
Dividend Yield	0.85		%	0.61		%	0.40		%	0.73		%	0.46		%	0.60		%
Expected Life	5.3 years			5.2 years			5.5 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, 2015, 2014 and 2013 (stock options and SARs in thousands):

	2015				2014				2013
	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	10,493		$	64.96	10,452		$	54.43	12,438		$	42.91
Granted	2,037		69.99		2,146		101.55		2,268		83.70
Exercised (1)	(1,518	)	47.64		(1,718	)	45.68		(4,046	)	35.62
Forfeited	(268	)	80.31		(387	)	68.95		(208	)	50.78
Outstanding at December 31	10,744		67.98		10,493		64.96		10,452		54.43
Stock Options/SARs Exercisable at December 31	5,993		57.96		5,287		49.40		4,638		43.95

(1) The total intrinsic value of stock options/SARs exercised during the years 2015, 2014 and 2013 was $60 million, $95 million and $151 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.

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, 2015 (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 $  44.99	2,184	2	$	41.08			2,182	2	$	41.08
45.00 to     56.99	2,672	3	52.37				2,229	3	51.64
57.00 to   69.99	2,019	7	69.13				51	4	62.11
70.00 to    84.99	1,832	4	84.25				936	4	84.36
85.00 to   116.99	2,037	5	101.49				595	5	101.61
	10,744	4	67.98		$	117,424	5,993	3	57.96		$	107,950

(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, 2015, approximately 568,000 shares of Common Stock remained available for issuance under the ESPP.  The following table summarizes ESPP activities for the years ended December 31, 2015, 2014 and 2013 (in thousands, except number of participants):

	2015		2014		2013
Approximate Number of Participants	1,963		1,991		1,844
Shares Purchased	225		202		256
Aggregate Purchase Price	$	15,045	$	14,927	$	14,015

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, 2015, 2014 and 2013 (shares and units in thousands):

	2015				2014				2013
	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	5,394		$	64.39	7,358		$	49.54	7,636		$	45.53
Granted	1,044		77.94		1,132		98.72		1,294		76.04
Released (1)	(1,331	)	51.52		(2,761	)	105.24		(1,368	)	52.39
Forfeited	(199	)	74.56		(335	)	62.55		(204	)	48.55
Outstanding at December 31 (2)	4,908		70.35		5,394		64.39		7,358		49.54

(1) The total intrinsic value of restricted stock and restricted stock units released during the years ended December 31, 2015, 2014 and 2013 was $109 million, $291 million and $101 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, 2015 and 2014 was approximately $347 million and $497 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, 2015, 2014 and 2013 were as follows:

	2015			2014			2013
Weighted Average Fair Value of Grants	$	80.64		$	119.27		$	100.34
Expected Volatility	29.35		%	32.18		%	33.63		%
Risk-Free Interest Rate	1.07		%	1.18		%	0.79		%

Performance Unit and Performance Stock Transactions

The following table sets forth performance unit and performance stock transactions for the years ended December 31, 2015, 2014 and 2013 (units and shares in thousands):

	2015			2014			2013
	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	333	$	90.17	261	$	82.18	142	$	67.05
Granted	72	80.64		72	119.27		119	100.34
Outstanding at December 31 (1)	405	88.48		333	90.17		261	82.18

(1) The total intrinsic value of performance units and performance stock outstanding at December 31, 2015 and 2014 was $29 million and $31 million, respectively.