Segment Information (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other		$ 3,983	$ 3,694
Operating Income		546	932
Other Expense, Net		(1)	(4)
Interest Expense, Net		(48)	(47)
Income Before Income Taxes		497	881
Total Assets		38,097		$ 38,236
United States
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other		3,914	3,606
Operating Income		519	890
Total Assets		37,275		37,436
Trinidad
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other		69	76
Operating Income		34	43
Total Assets		676		637
Other International
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other	[1]	0	12
Operating Income	[1]	(7)	$ (1)
Total Assets	[2]	$ 146		$ 163

[1] Other International primarily consists of EOG's China and Canada operations. The China operations were sold in the second quarter of 2021. EOG began exploration programs in Australia in the third quarter of 2021 and in Oman in the third quarter of 2020. The decision was reached in the fourth quarter of 2021 to exit Block 36 and Block 49 in Oman.

[2] Other International primarily consists of EOG's China and Canada operations. The China operations were sold in the second quarter of 2021. EOG began exploration programs in Australia in the third quarter of 2021 and in Oman in the third quarter of 2020. The decision was reached in the fourth quarter of 2021 to exit Block 36 and Block 49 in Oman.