Segment Information (Details) - USD ($)		3 Months Ended			6 Months Ended
		Jun. 30, 2020		Jun. 30, 2019	Jun. 30, 2020		Jun. 30, 2019	Dec. 31, 2019
Selected Information [Line Items]
Document Period End Date					Jun. 30, 2020
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other		$ 1,103,374,000		$ 4,697,630,000	$ 5,821,066,000		$ 8,756,272,000
Operating Income (Loss)		(1,086,549,000)		1,130,771,000	(1,028,964,000)		2,007,301,000
Other Income, Net		(4,500,000)		8,503,000	13,608,000		14,115,000
Interest Expense, Net		(54,213,000)		(49,908,000)	(98,903,000)		(104,814,000)
Income (Loss) Before Income Taxes		(1,145,262,000)		1,089,366,000	(1,114,259,000)		1,916,602,000
Total Assets		35,221,671,000			35,221,671,000			$ 37,124,608,000
Pretax Impairment Charges for Proved Oil and Gas Properties and Other Property, Plant and Equipment					1,160,000,000
Pretax Impairment Changes For Other Assets					72,000,000
United States
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other		1,055,673,000		4,611,789,000	5,716,408,000		8,588,808,000
Operating Income (Loss)		(1,079,201,000)		1,107,910,000	(973,795,000)		1,958,810,000
Total Assets		34,534,344,000			34,534,344,000			36,274,942,000
Pretax Impairment Charges for Proved Oil and Gas Properties and Other Property, Plant and Equipment		6,000,000			1,462,000,000
Pretax Impairment Changes For Other Assets					219,000,000
Trinidad
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other		33,899,000		71,132,000	75,542,000		141,000,000
Operating Income (Loss)		10,234,000		34,390,000	22,897,000		73,222,000
Total Assets		531,454,000			531,454,000			705,747,000
Other International
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other	[1]	13,802,000		14,709,000	29,116,000		26,464,000
Operating Income (Loss)	[1]	(17,582,000)		$ (11,529,000)	(78,066,000)		$ (24,731,000)
Total Assets	[1]	155,873,000	[2]		155,873,000	[2]		$ 143,919,000
Pretax Impairment Charges for Proved Oil and Gas Properties and Other Property, Plant and Equipment		$ 19,000,000			$ 79,000,000

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

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