Employee Benefit Plans (Details) $ / shares in Units, $ in Thousands			12 Months Ended
		Feb. 01, 2021 shares	Dec. 31, 2021 USD ($) participants $ / shares shares		Dec. 31, 2020 USD ($) participants $ / shares shares		Dec. 31, 2019 USD ($) participants $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense related to the company's stock-based compensation plans | $			$ 152,000		$ 146,000		$ 175,000
Aggregate Maximum of Common Shares			20,000,000
Common Shares Available for Grant			18,000,000
Share-based Payment Arrangement, Expense, Tax Deficiencies | $			$ (11,000)		(22,000)		(1,000)
Stock Options and Sars [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum term of stock options and SARs granted			7 years
Stock-Based Compensation Expense | $			$ 48,000		$ 62,000		$ 63,000
Unrecognized compensation expense | $			$ 60,000
Stock Options/SARs Vested or Expected to Vest (in shares)			9,700,000
Intrinsic value of stock options/SARs vested or expected to vest | $			$ 120,000
Weighted Average Remaining Contractual Life for Stock Options/SARs Vested or Expected to Vest			4 years 1 month 6 days
Weighted average period over which unrecognized compensation expense will be recognized			2 years 1 month 6 days
Weighted average grant price for stock options/SARs vested or expected to vest (per share) | $ / shares			$ 84.97
Stock Options and SARs Rollforward [Abstract]
Outstanding at January 1 (in shares)			10,186,000		9,395,000		8,310,000
Granted (in shares)			1,982,000		1,996,000		1,965,000
Exercised (1) (in shares)	[1]		(1,130,000)		(23,000)		(606,000)
Forfeited (in shares)			(1,069,000)		(1,182,000)		(274,000)
Outstanding at December 31 (in shares)			9,969,000		10,186,000		9,395,000
Stock Options/SARs Exercisable at December 31 (in shares)			6,197,000		6,343,000		5,275,000
Intrinsic Value Of Stock Options/SARs Exercised During The Period | $			$ 27,000		$ 400		$ 14,000
Weighted Average Grant Price Stock Option and SARs [Rollfoward]
Outstanding at January 1 (in dollars per share) | $ / shares			$ 84.08		$ 94.53		$ 96.90
Granted (in dollars per share) | $ / shares			81.68		37.63		75.39
Exercised (in dollars per share) | $ / shares	[1]		63.98		69.59		61.43
Forfeited (in dollars per share) | $ / shares			98.15		88.93		102.57
Outstanding at December 31 (in dollars per share) | $ / shares			84.37		84.08		94.53
Stock Options/SARs Exercisable at December 31 (in dollars per share) | $ / shares			95.33		96.41		94.21
Weighted Average Fair Value And Valuation Assumptions Used To Value Stock Options/SARs, ESPP, and Performance Units/Stock-Based Compensation [Abstract]
Weighted Average Fair Value of Grants (price per share) | $ / shares			$ 24.92		$ 11.06		$ 19.49
Expected Volatility (in hundredths)			42.24%		44.47%		32.02%
Risk-Free Interest Rate (in hundredths)			0.50%		0.21%		1.69%
Dividend Yield (in hundredths)			2.26%		3.27%		1.39%
Expected Life (in years)			5 years 2 months 12 days		5 years 2 months 12 days		5 years 1 month 6 days
Summary Information By Grant Price Range For Stock Options And SARs Outstanding And Exercisable At End Of Period [Line Items]
Stock Options and SARs Outstanding			9,969,000
Weighted Average Remaining Life for Outstanding Options and SARs			4 years
Weighted Average Grant Price For Outstanding Options and SARs | $ / shares			$ 84.37
Aggregate Intrinsic Value For Outstanding Options and SARs | $	[2]		$ 127,000
Stock Options and SARs Exercisable			6,197,000
Weighted Average Remaining Life For Exercisable Units			3 years
Weighted Average Grant Price For Exercisable Options and SARs | $ / shares			$ 95.33
Aggregate Intrinsic Value For Exercisable Units | $	[2]		$ 42,000
Stock Options and Sars [Member] | Vesting Schedule - First Anniversary [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period Increments (in hundredths)			33.30%
Stock Options and Sars [Member] | Vesting Schedule - Second Anniversary [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period Increments (in hundredths)			33.30%
Stock Options and Sars [Member] | Vesting Schedule - Third Anniversary [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period Increments (in hundredths)			33.40%
ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Shares Available for Grant			1,600,000
Maximum Percentage Of Employee Pay Eligible For Contribution To ESPP Percentage			10.00%
Percentage of fair market value at which employees may purchase company stock via the ESPP			85.00%
Employee Stock Purchase Plan (ESPP) Disclosures [Abstract]
Aggregate Purchase Price | $			$ 17,224		$ 16,103		$ 16,533
Shares Purchased			316,000		377,000		224,000
Approximate Number of Participants | participants			2,036		2,063		1,998
Weighted Average Fair Value And Valuation Assumptions Used To Value Stock Options/SARs, ESPP, and Performance Units/Stock-Based Compensation [Abstract]
Weighted Average Fair Value of Grants (price per share) | $ / shares			$ 18.12		$ 19.14		$ 22.83
Expected Volatility (in hundredths)			51.27%		53.48%		34.78%
Risk-Free Interest Rate (in hundredths)			0.07%		0.90%		2.27%
Dividend Yield (in hundredths)			2.89%		2.27%		1.04%
Expected Life (in years)			6 months		6 months		6 months
Restricted Stock and Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-Based Compensation Expense | $			$ 89,000		$ 75,000		$ 97,000
Intrinsic value released during the year | $			110,000		48,000		70,000
Aggregate intrinsic value of stock and unit outstanding | $			416,000		$ 236,000		$ 381,000
Unrecognized compensation expense | $			$ 199,000
Weighted average period over which unrecognized compensation expense will be recognized			1 year 6 months
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			3 years
Number of Shares and Units [Roll Forward]
Outstanding at January 1 (in shares)			4,742,000	[3]	4,546,000	[3]	3,792,000
Granted (in shares)			1,422,000		1,488,000		1,749,000
Released (in shares)	[4]		(1,388,000)		(1,213,000)		(855,000)
Forfeited (in shares)			(96,000)		(79,000)		(140,000)
Outstanding at December 31 (in shares)	[3]		4,680,000		4,742,000		4,546,000
Weighted Average Grant Fair Value [Abstract]
Outstanding at January 1 (in dollars per share) | $ / shares			$ 74.97	[3]	$ 90.16	[3]	$ 96.64
Granted (in dollars per share) | $ / shares			81.50		38.10		80.01
Released (in dollars per share) | $ / shares	[4]		101.00		85.92		96.93
Forfeited (in dollars per share) | $ / shares			68.26		86.52		97.54
Outstanding at December 31 (in dollars per share) | $ / shares	[3]		$ 69.37		$ 74.97		$ 90.16
Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense related to the company's stock-based compensation plans | $			$ 15,000		$ 9,000		$ 15,000
Intrinsic value released during the year | $			13,000		13,000		15,000
Aggregate intrinsic value of stock and unit outstanding | $			60,000		$ 31,000		$ 50,000
Unrecognized compensation expense | $			$ 13,000
Weighted average period over which unrecognized compensation expense will be recognized			1 year 10 months 24 days
Cliff Vesting Period			3 years 5 months 1 day
Number of Shares and Units [Roll Forward]
Outstanding at January 1 (in shares)			613,000	[5]	598,000	[5]	539,000
Granted (in shares)			222,000		172,000		172,000
Granted for Performance Multiple (1) (in shares)	[6]		19,000		66,000		72,000
Released (in shares)	[7]		(175,000)		(223,000)		(185,000)
Forfeited (in shares)			0		0		0
Outstanding at December 31 (in shares)	[5]		679,000	[8]	613,000		598,000
Weighted Average Grant Fair Value [Abstract]
Outstanding at January 1 (in dollars per share) | $ / shares			$ 88.38	[5]	$ 103.91	[5]	$ 116.96
Granted (in dollars per share) | $ / shares			95.16		42.77		79.98
Granted for Performance Multiple (1) (in dollars per share) | $ / shares	[6]		113.81		119.10		80.64
Released (in dollars per share) | $ / shares	[7]		113.06		103.87		110.65
Forfeited (in dollars per share) | $ / shares			0		0		0
Outstanding at December 31 (in dollars per share) | $ / shares	[5]		84.97		88.38		103.91
Weighted Average Fair Value And Valuation Assumptions Used To Value Stock Options/SARs, ESPP, and Performance Units/Stock-Based Compensation [Abstract]
Weighted Average Fair Value of Grants (price per share) | $ / shares			$ 95.16		$ 42.77		$ 79.98
Expected Volatility (in hundredths)			53.80%		47.27%		29.20%
Risk-Free Interest Rate (in hundredths)			0.59%		0.16%		1.51%
Performance Units and Performance Stock [Abstract]
performance period for performance units			3 years
Minimum Performance Multiple at the Completion Performance Period			0.00%
Maximum Performance Multiple at the Completion Performance Period			200.00%
Performance Multiple Applied at the Completion Period		50.00%	125.00%		150.00%		200.00%
Minimum Performance Units and Stock Allowed to be Outstanding			0
Maximum Performance Units and Stock Allowed to be Outstanding			1,358
Additional Performance Awards Granted		56,671
Pension Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan costs | $			$ 52,000		$ 46,000		$ 51,000
Company contributions to foreign pension plans | $			1,000		1,000		1,000
Defined Benefit Plan, Benefit Obligation | $			13,000		13,000
Fair value of foreign pension plan assets | $			14,000		12,000
Prepaid benefit cost | $			(100)
Accrued benefit cost | $					100
Lease And Well [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense related to the company's stock-based compensation plans | $			49,000		52,000		56,000
Gathering And Processing Costs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense related to the company's stock-based compensation plans | $			3,000		1,000		1,000
Exploration Costs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense related to the company's stock-based compensation plans | $			20,000		21,000		26,000
General And Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense related to the company's stock-based compensation plans | $			$ 80,000		$ 72,000		$ 92,000
$ 34.00 to $  52.99 | Stock Options and Sars [Member]
Summary Information By Grant Price Range For Stock Options And SARs Outstanding And Exercisable At End Of Period [Line Items]
Stock Options and SARs Outstanding			1,640,000
Weighted Average Remaining Life for Outstanding Options and SARs			6 years
Weighted Average Grant Price For Outstanding Options and SARs | $ / shares			$ 37.50
Stock Options and SARs Exercisable			414,000
Weighted Average Remaining Life For Exercisable Units			5 years
Weighted Average Grant Price For Exercisable Options and SARs | $ / shares			$ 37.46
53.00 to     75.99 | Stock Options and Sars [Member]
Summary Information By Grant Price Range For Stock Options And SARs Outstanding And Exercisable At End Of Period [Line Items]
Stock Options and SARs Outstanding			1,906,000
Weighted Average Remaining Life for Outstanding Options and SARs			4 years
Weighted Average Grant Price For Outstanding Options and SARs | $ / shares			$ 73.68
Stock Options and SARs Exercisable			1,313,000
Weighted Average Remaining Life For Exercisable Units			3 years
Weighted Average Grant Price For Exercisable Options and SARs | $ / shares			$ 73.11
76.00 to     90.99 | Stock Options and Sars [Member]
Summary Information By Grant Price Range For Stock Options And SARs Outstanding And Exercisable At End Of Period [Line Items]
Stock Options and SARs Outstanding			1,976,000
Weighted Average Remaining Life for Outstanding Options and SARs			7 years
Weighted Average Grant Price For Outstanding Options and SARs | $ / shares			$ 81.86
Stock Options and SARs Exercisable			33,000
Weighted Average Remaining Life For Exercisable Units			2 years
Weighted Average Grant Price For Exercisable Options and SARs | $ / shares			$ 83.71
91.00 to     95.99 | Stock Options and Sars [Member]
Summary Information By Grant Price Range For Stock Options And SARs Outstanding And Exercisable At End Of Period [Line Items]
Stock Options and SARs Outstanding			1,114,000
Weighted Average Remaining Life for Outstanding Options and SARs			2 years
Weighted Average Grant Price For Outstanding Options and SARs | $ / shares			$ 94.95
Stock Options and SARs Exercisable			1,109,000
Weighted Average Remaining Life For Exercisable Units			2 years
Weighted Average Grant Price For Exercisable Options and SARs | $ / shares			$ 94.96
96.00 to   101.99 | Stock Options and Sars [Member]
Summary Information By Grant Price Range For Stock Options And SARs Outstanding And Exercisable At End Of Period [Line Items]
Stock Options and SARs Outstanding			1,657,000
Weighted Average Remaining Life for Outstanding Options and SARs			3 years
Weighted Average Grant Price For Outstanding Options and SARs | $ / shares			$ 96.34
Stock Options and SARs Exercisable			1,652,000
Weighted Average Remaining Life For Exercisable Units			3 years
Weighted Average Grant Price For Exercisable Options and SARs | $ / shares			$ 96.33
102.00 to   129.99 | Stock Options and Sars [Member]
Summary Information By Grant Price Range For Stock Options And SARs Outstanding And Exercisable At End Of Period [Line Items]
Stock Options and SARs Outstanding			1,676,000
Weighted Average Remaining Life for Outstanding Options and SARs			4 years
Weighted Average Grant Price For Outstanding Options and SARs | $ / shares			$ 126.51
Stock Options and SARs Exercisable			1,676,000
Weighted Average Remaining Life For Exercisable Units			4 years
Weighted Average Grant Price For Exercisable Options and SARs | $ / shares			$ 126.51

[1] The total intrinsic value of stock options/SARs exercised during the years 2021, 2020 and 2019 was $27 million, $0.4 million and $14 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.

[2] 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, in millions.

[3] The total intrinsic value of restricted stock and restricted stock units outstanding at December 31, 2021, 2020 and 2019 was $416 million, $236 million and $381 million, respectively. The intrinsic value is based on the closing market price of the Common Stock on the last trading day of the year.

[4] The total intrinsic value of restricted stock and restricted stock units released during the years ended December 31, 2021, 2020 and 2019 was $110 million, $48 million and $70 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)

[5] The total intrinsic value of Performance Units outstanding at December 31, 2021, 2020 and 2019 was $60 million, $31 million and $50 million, respectively. The intrinsic value is based on the closing market price of the Common Stock on the last trading day of the year.

[6] Upon completion of the Performance Period for the Performance Units granted in 2017, 2016 and 2015, a performance multiple of 125%, 150% and 200%, respectively, was applied to each of the grants resulting in additional grants of Performance Units in February 2021, 2020 and 2019.

[7] The total intrinsic value of Performance Units released during the years ended December 31, 2021, 2020 and 2019 was $13 million, $13 million and $15 million, respectively. The intrinsic value is based upon the closing price of EOG's common stock on the date Performance Units are released.

[8] Upon the application of the relevant performance multiple at the completion of each of the remaining Performance Periods, a minimum of zero and a maximum of 1,358 Performance Units could be outstanding.