Stockholder's Equity (Details) - USD ($) $ / shares in Units, $ in Billions				12 Months Ended
		Feb. 24, 2022	Nov. 04, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	May 06, 2021
Stockholders' Equity Note [Abstract]
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
Stock Repurchase Program, Authorized Amount				$ 5
Stock Repurchase Program, Remaining Authorized Repurchase Amount				$ 5
Dividends Common Stock Declared Per Share		$ 0.75	$ 0.4125	$ 0.375	$ 0.2875	$ 0.22
Dividends Payable, Amount Per Share After Increase			0.75	$ 0.4125	$ 0.375	$ 0.2875
Common Stock Special Cash Dividends Per Share Declared		$ 1.00	$ 2.00				$ 1.00
Common Stock Activity [Line Items]
Beginning Balance (in shares)				583,694,850
Ending Balance (in shares)				585,521,512	583,694,850
Preferred Stock, Shares Outstanding				0
Common Shares, Outstanding
Common Stock Activity [Line Items]
Beginning Balance (in shares)				583,571,000	581,914,000	580,023,000
Common Stock Issued Under Stock-Based Compensation Plans (in shares)				1,511,000	1,482,000	1,688,000
Treasury Stock Purchased (1) (in shares)	[1]			(504,000)	(389,000)	(310,000)
Common Stock Issued Under Employee Stock Purchase Plan (in shares)				316,000	377,000	224,000
Treasury Stock Issued Under Stock-Based Compensation Plans (in shares)				371,000	187,000	289,000
Ending Balance (in shares)				585,265,000	583,571,000	581,914,000
Common Shares, Treasury
Common Stock Activity [Line Items]
Beginning Balance (in shares)				124,000	299,000	385,000
Common Stock Issued Under Stock-Based Compensation Plans (in shares)				0	0	0
Treasury Stock Purchased (1) (in shares)	[1]			(504,000)	(389,000)	(310,000)
Common Stock Issued Under Employee Stock Purchase Plan (in shares)				0	377,000	107,000
Treasury Stock Issued Under Stock-Based Compensation Plans (in shares)				371,000	187,000	289,000
Ending Balance (in shares)				257,000	124,000	299,000
Common Shares, Issued
Common Stock Activity [Line Items]
Beginning Balance (in shares)				583,695,000	582,213,000	580,408,000
Common Stock Issued Under Stock-Based Compensation Plans (in shares)				1,511,000	1,482,000	1,688,000
Treasury Stock Purchased (1) (in shares)	[1]			0	0	0
Common Stock Issued Under Employee Stock Purchase Plan (in shares)				316,000	0	117,000
Treasury Stock Issued Under Stock-Based Compensation Plans (in shares)				0	0	0
Ending Balance (in shares)				585,522,000	583,695,000	582,213,000

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