Segment Information (Details) - USD ($)		3 Months Ended			9 Months Ended
		Sep. 30, 2020		Sep. 30, 2019	Sep. 30, 2020		Sep. 30, 2019	Dec. 31, 2019
Selected Information [Line Items]
Document Period End Date					Sep. 30, 2020
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other		$ 2,245,484,000		$ 4,303,455,000	$ 8,066,550,000		$ 13,059,727,000
Operating Income (Loss)		(2,714,000)		827,959,000	(1,031,678,000)		2,835,260,000
Other Income, Net		3,401,000		9,118,000	17,009,000		23,233,000
Interest Expense, Net		(53,242,000)		(39,620,000)	(152,145,000)		(144,434,000)
Income (Loss) Before Income Taxes		(52,555,000)		797,457,000	(1,166,814,000)		2,714,059,000
Total Assets		35,074,018,000			35,074,018,000			$ 37,124,608,000
Pretax Impairment Charges for Proved Oil and Gas Properties and Other Property, Plant and Equipment					1,185,000,000
Pretax Impairment Changes For Other Assets					72,000,000
United States
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other		2,196,495,000		4,224,510,000	7,912,903,000		12,813,318,000
Operating Income (Loss)		(16,603,000)		825,983,000	(990,398,000)		2,784,793,000
Total Assets		34,381,223,000			34,381,223,000			36,274,942,000
Pretax Impairment Charges for Proved Oil and Gas Properties and Other Property, Plant and Equipment		26,000,000			1,488,000,000
Pretax Impairment Changes For Other Assets		1,000,000			220,000,000
Trinidad
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other		35,377,000		64,726,000	110,919,000		205,726,000
Operating Income (Loss)		11,984,000		8,991,000	34,881,000		82,213,000
Total Assets		530,277,000			530,277,000			705,747,000
Other International
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other	[1]	13,612,000		14,219,000	42,728,000		40,683,000
Operating Income (Loss)	[1]	1,905,000	[2]	$ (7,015,000)	(76,161,000)	[2]	$ (31,746,000)
Total Assets	[3]	162,518,000			162,518,000			$ 143,919,000
Pretax Impairment Charges for Proved Oil and Gas Properties and Other Property, Plant and Equipment		$ 0			$ 79,000,000

[1] Other International primarily consists of EOG's China and Canada operations.

[2] EOG recorded pretax impairment charges of zero and $79 million for the three and nine months ended September 30, 2020, respectively, for proved oil and gas properties and firm commitment contracts related to its decision to exit the Horn River Basin in British Columbia, Canada.

[3] Other International primarily consists of EOG's China and Canada operations