Oil and Gas Exploration and Production Industries Disclosures, Discounted Future Net Cash Flows (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items]
Future cash inflows					$ 58,840,424	[1]	$ 68,720,648	[2]	$ 146,950,221	[3]
Future production costs					(28,018,883)		(32,060,855)		(51,633,293)
Future development costs					(12,741,932)		(15,785,811)		(20,494,765)
Future income taxes					(3,211,320)		(4,616,201)		(23,185,714)
Future net cash flows					14,868,289		16,257,781		51,636,449
Discount to present value at 10% annual rate					(6,056,132)		(6,636,385)		(23,713,031)
Standardized measure of discounted future net cash flows relating to proved oil and gas reserves		$ 9,621,396	$ 27,923,418	$ 21,333,432	8,812,157		9,621,396		27,923,418
Annual Rate of Discount to Present Value		10.00%	10.00%	10.00%
Increase (Decrease) in Standardized Measure of Discounted Future Net Cash Flow Relating to Proved Oil and Gas Reserves [Roll Forward]
Balance at Beginning of Period		$ 9,621,396	$ 27,923,418	$ 21,333,432
Sales and transfers of oil and gas produced, net of production costs		(3,478,625)	(4,020,717)	(9,470,714)
Net changes in prices and production costs		(3,679,602)	(30,669,350)	1,263,177
Extensions, discoveries, additions and improved recovery, net of related costs		907,267	1,095,898	8,083,852
Development costs incurred		1,230,000	2,137,700	2,835,100
Revisions of estimated development cost		2,121,708	4,079,381	1,802,735
Revisions of previous quantity estimates		1,053,020	(4,051,874)	1,812,532
Accretion of discount		1,054,435	3,857,479	2,833,350
Net change in income taxes		868,038	9,728,423	(3,651,300)
Purchases of reserves in place		377,872	123,542	317,785
Sales of reserves in place		(375,793)	(37,088)	(478,879)
Changes in timing and other		(887,559)	(545,416)	1,242,348
Balance at End of Period		8,812,157	9,621,396	27,923,418
United States
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items]
Future cash inflows					57,913,314	[1]	67,242,928	[2]	144,355,692	[3]
Future production costs					(27,625,833)		(31,707,743)		(51,112,604)
Future development costs					(12,602,699)		(15,579,923)		(20,270,439)
Future income taxes					(3,151,319)		(4,400,542)		(22,725,618)
Future net cash flows					14,533,463		15,554,720		50,247,031
Discount to present value at 10% annual rate					(6,039,736)		(6,589,253)		(23,542,990)
Standardized measure of discounted future net cash flows relating to proved oil and gas reserves		8,965,467	26,704,041	19,576,901	8,493,727		8,965,467		26,704,041
Increase (Decrease) in Standardized Measure of Discounted Future Net Cash Flow Relating to Proved Oil and Gas Reserves [Roll Forward]
Balance at Beginning of Period		8,965,467	26,704,041	19,576,901
Sales and transfers of oil and gas produced, net of production costs		(3,260,372)	(3,685,600)	(8,874,180)
Net changes in prices and production costs		(3,352,802)	(29,993,699)	1,481,668
Extensions, discoveries, additions and improved recovery, net of related costs		865,066	1,028,410	8,074,550
Development costs incurred		1,207,000	2,135,800	2,818,800
Revisions of estimated development cost		2,092,769	4,087,093	1,696,916
Revisions of previous quantity estimates		1,013,753	(4,084,572)	1,741,918
Accretion of discount		970,388	3,699,330	2,612,286
Net change in income taxes		738,416	9,550,847	(3,743,300)
Purchases of reserves in place		377,872	123,542	317,785
Sales of reserves in place		(375,793)	(23,424)	(189,808)
Changes in timing and other		(748,037)	(576,301)	1,190,505
Balance at End of Period		8,493,727	8,965,467	26,704,041
Trinidad
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items]
Future cash inflows					524,523	[1]	954,779	[2]	1,615,280	[3]
Future production costs					(165,757)		(183,607)		(277,844)
Future development costs					(103,631)		(140,541)		(84,576)
Future income taxes					(60,001)		(215,659)		(460,096)
Future net cash flows					195,134		414,972		792,764
Discount to present value at 10% annual rate					(9,384)		(33,848)		(110,228)
Standardized measure of discounted future net cash flows relating to proved oil and gas reserves		381,124	682,536	876,640	185,750		381,124		682,536
Increase (Decrease) in Standardized Measure of Discounted Future Net Cash Flow Relating to Proved Oil and Gas Reserves [Roll Forward]
Balance at Beginning of Period		381,124	682,536	876,640
Sales and transfers of oil and gas produced, net of production costs		(215,414)	(351,606)	(473,757)
Net changes in prices and production costs		(182,876)	(370,503)	(12,079)
Extensions, discoveries, additions and improved recovery, net of related costs		42,201	47,613	3,113
Development costs incurred		3,900	500	12,800
Revisions of estimated development cost		22,596	(34,647)	9,981
Revisions of previous quantity estimates		36,648	33,285	35,001
Accretion of discount		56,566	104,464	133,019
Net change in income taxes		129,622	177,576	91,438
Purchases of reserves in place		0	0	0
Sales of reserves in place		0	0	0
Changes in timing and other		(88,617)	91,906	6,380
Balance at End of Period		185,750	381,124	682,536
Other International (1)
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items]
Future cash inflows	[4]				402,587	[1]	522,941	[2]	979,249	[3]
Future production costs	[4]				(227,293)		(169,505)		(242,845)
Future development costs	[4]				(35,602)		(65,347)		(139,750)
Future income taxes	[4]				0		0		0
Future net cash flows	[4]				139,692		288,089		596,654
Discount to present value at 10% annual rate	[4]				(7,012)		(13,284)		(59,813)
Standardized measure of discounted future net cash flows relating to proved oil and gas reserves	[4]	274,805	536,841	879,891	$ 132,680		$ 274,805		$ 536,841
Increase (Decrease) in Standardized Measure of Discounted Future Net Cash Flow Relating to Proved Oil and Gas Reserves [Roll Forward]
Balance at Beginning of Period	[4]	274,805	536,841	879,891
Sales and transfers of oil and gas produced, net of production costs	[4]	(2,839)	16,489	(122,777)
Net changes in prices and production costs	[4]	(143,924)	(305,148)	(206,412)
Extensions, discoveries, additions and improved recovery, net of related costs	[4]	0	19,875	6,189
Development costs incurred	[4]	19,100	1,400	3,500
Revisions of estimated development cost	[4]	6,343	26,935	95,838
Revisions of previous quantity estimates	[4]	2,619	(587)	35,613
Accretion of discount	[4]	27,481	53,685	88,045
Net change in income taxes	[4]	0	0	562
Purchases of reserves in place	[4]	0	0	0
Sales of reserves in place	[4]	0	(13,664)	(289,071)
Changes in timing and other	[4]	(50,905)	(61,021)	45,463
Balance at End of Period	[4]	$ 132,680	$ 274,805	$ 536,841

[1] Estimated crude oil prices used to calculate 2016 future cash inflows for the United States, Trinidad and Other International were $40.70, $34.79 and $39.55, respectively. Estimated NGL price used to calculate 2016 future cash inflows for the United States was $14.69. Estimated natural gas prices used to calculate 2016 future cash inflows for the United States, Trinidad and Other International were $1.40, $1.76 and $4.84, respectively.

[2] Estimated crude oil prices used to calculate 2015 future cash inflows for the United States, Trinidad and Other International were $49.58, $38.83 and $47.76, respectively. Estimated NGL price used to calculate 2015 future cash inflows for the United States was $15.17. Estimated natural gas prices used to calculate 2015 future cash inflows for the United States, Trinidad and Other International were $2.15, $2.88 and $5.60, respectively.

[3] Estimated crude oil prices used to calculate 2014 future cash inflows for the United States, Trinidad and Other International were $97.51, $80.60 and $94.09, respectively. Estimated NGL prices used to calculate 2014 future cash inflows for the United States and Other International were $34.29 and $27.03, respectively. Estimated natural gas prices used to calculate 2014 future cash inflows for the United States, Trinidad and Other International were $3.71, $3.71 and $5.14, respectively.

[4] Other International includes EOG's United Kingdom, China, Canada and Argentina operations. The Argentina operations were sold in the third quarter of 2016.