Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Dec. 31, 2013
Schedule of Segment Reporting Information By Segment [Abstract]
Net Operating Revenues	$ 4,083,671		$ 3,356,514
Operating Income (Loss)	1,084,279		833,074
Other Expense, Net	(3,338)		(10,134)
Interest Expense, Net	50,152		61,921
Income Before Income Taxes	1,030,789		761,019
Total Assets	32,141,288				30,574,238
United States [Member]
Schedule of Segment Reporting Information By Segment [Abstract]
Net Operating Revenues	3,852,065		3,031,852
Operating Income (Loss)	1,041,021		690,526
Total Assets	29,335,974				27,668,713
Canada [Member]
Schedule of Segment Reporting Information By Segment [Abstract]
Net Operating Revenues	90,574		183,743
Operating Income (Loss)	(10,038)		71,413
Total Assets	832,451				880,765
Trinidad [Member]
Schedule of Segment Reporting Information By Segment [Abstract]
Net Operating Revenues	136,733		135,348
Operating Income (Loss)	74,315		80,895
Total Assets	982,956				986,796
Other International [Member]
Schedule of Segment Reporting Information By Segment [Abstract]
Net Operating Revenues	4,299	[1]	5,571	[1]
Operating Income (Loss)	(21,019)	[1]	(9,760)	[1]
Total Assets	$ 989,907	[1]			$ 1,037,964	[1]

[1] Other International primarily includes EOG's United Kingdom, China and Argentina operations.