Stockholder's Equity (Details) - USD ($)		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Stockholders' Equity Note [Abstract]
Common Stock, Par (in dollars per share)		$ 0.01	$ 0.01
An aggregate maximum of shares of common stock authorized for repurchase		10,000,000
Remaining shares available for purchase under share repurchase authorization		6,386,200
Dividends Common Stock Cash			$ 0.125	$ 0.0938
Percentage increase of cash dividend on common stock paid on October 31, 2014		34.00%
Percentage increase of cash dividend on common stock paid on April 30, 2014		33.00%
Dividends Payable, Amount Per Share After Increase		$ 0.1675
Common Stock Activity [Line Items]
Balance (in shares)		549,028,374
Balance (in shares)		550,150,823	549,028,374
Preferred Stock, Shares Outstanding		0
Common Shares, Outstanding [Member]
Common Stock Activity [Line Items]
Balance (in shares)		548,295,000	546,172,000	543,264,000
Common Stock Issued Under Equity Compensation Plans (in shares)		1,019,000	2,448,000	2,206,000
Treasury Stock Purchased (in shares)	[1]	(581,000)	(1,209,000)	(854,000)
Common Stock Issued Under Employee Stock Purchase Plan (in shares)		225,000	202,000	256,000
Treasury Stock Issued Under Equity Compensation Plans (in shares)		901,000	682,000	1,300,000
Balance (in shares)		549,859,000	548,295,000	546,172,000
Common Shares, Treasury [Member]
Common Stock Activity [Line Items]
Balance (in shares)		(733,000)	(206,000)	(652,000)
Common Stock Issued Under Equity Compensation Plans (in shares)		0	0	0
Treasury Stock Purchased (in shares)	[1]	(581,000)	(1,209,000)	(854,000)
Common Stock Issued Under Employee Stock Purchase Plan (in shares)		121,000	0	0
Treasury Stock Issued Under Equity Compensation Plans (in shares)		901,000	682,000	1,300,000
Balance (in shares)		(292,000)	(733,000)	(206,000)
Common Shares, Issued [Member]
Common Stock Activity [Line Items]
Balance (in shares)		549,028,000	546,378,000	543,916,000
Common Stock Issued Under Equity Compensation Plans (in shares)		1,019,000	2,448,000	2,206,000
Treasury Stock Purchased (in shares)	[1]	0	0	0
Common Stock Issued Under Employee Stock Purchase Plan (in shares)		104,000	202,000	256,000
Treasury Stock Issued Under Equity Compensation Plans (in shares)		0	0	0
Balance (in shares)		550,151,000	549,028,000	546,378,000

[1] Represents shares that were withheld by, or returned to, EOG in satisfaction of tax withholding obligations that arose upon the exercise of employee stock options or SARs, the vesting of restricted stock or restricted stock unit grants or in payment of the exercise price of employee stock options.