Stockholder's Equity (Details) (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
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)	546,378,440
Balance (in shares)	549,028,374		546,378,440
Preferred Stock, Shares Outstanding	0
Common Shares, Outstanding [Member]
Common Stock Activity [Line Items]
Balance (in shares)	546,172,000		543,264,000		538,038,000
Common Stock Issued Under Equity Compensation Plans (in shares)	2,448,000		2,206,000		4,942,000
Treasury Stock Purchased (in shares)	(1,209,000)	[1]	(854,000)	[1]	(1,150,000)	[1]
Common Stock Issued Under Employee Stock Purchase Plan (in shares)	202,000		256,000		328,000
Treasury Stock Issued Under Other Equity Compensation Plans (in shares)	682,000		1,300,000		1,106,000
Balance (in shares)	548,295,000		546,172,000		543,264,000
Common Shares, Treasury [Member]
Common Stock Activity [Line Items]
Balance (in shares)	(206,000)		(652,000)		(608,000)
Common Stock Issued Under Equity Compensation Plans (in shares)	0		0		0
Treasury Stock Purchased (in shares)	(1,209,000)	[1]	(854,000)	[1]	(1,150,000)	[1]
Common Stock Issued Under Employee Stock Purchase Plan (in shares)	0		0		0
Treasury Stock Issued Under Other Equity Compensation Plans (in shares)	682,000		1,300,000		1,106,000
Balance (in shares)	(733,000)		(206,000)		(652,000)
Common Shares, Issued [Member]
Common Stock Activity [Line Items]
Balance (in shares)	546,378,000		543,916,000		538,646,000
Common Stock Issued Under Equity Compensation Plans (in shares)	2,448,000		2,206,000		4,942,000
Treasury Stock Purchased (in shares)	0	[1]	0	[1]	0	[1]
Common Stock Issued Under Employee Stock Purchase Plan (in shares)	202,000		256,000		328,000
Treasury Stock Issued Under Other Equity Compensation Plans (in shares)	0		0		0
Balance (in shares)	549,028,000		546,378,000		543,916,000

[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.