Oil and Gas Exploration and Production Industries Disclosures (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2016 USD ($) MBoe MMcf MBbls	Dec. 31, 2015 USD ($) MBoe MMcf MBbls	Dec. 31, 2014 MBoe MMcf MBbls	Dec. 31, 2013 MBoe MMcf MBbls
Reserve Quantities [Line Items]
Net proved developed reserves (MBOE) | MBoe		1,093,906	1,072,477	1,347,947	1,127,476
Net Proved Undeveloped Reserves (MBOE) [Rollforward]
Balance at January 1 | MBoe		1,045,640	1,149,309	991,067
Extensions and Discoveries | MBoe		138,101	205,152	403,713
Revisions | MBoe		64,413	(241,973)	(79,630)
Acquisition of Reserves | MBoe		0	54,458	4,239
Sales of Reserves | MBoe		(45,917)	0	(10,176)
Conversion to Proved Developed Reserves | MBoe		(149,210)	(121,306)	(159,904)
Balance at December 31 | MBoe		1,053,027	1,045,640	1,149,309
Capitalized Costs, Oil and Gas Producing Activities, Gross [Abstract]
Proved properties | $		$ 45,751,965	$ 49,623,518
Unproved properties | $		3,840,126	989,723
Total | $		49,592,091	50,613,241
Accumulated depreciation, depletion and amortization | $		(26,247,062)	(28,877,593)
Net capitalized costs | $		$ 23,345,029	$ 21,735,648
Crude Oil (MBbl)
Reserve Quantities [Line Items]
Net proved developed reserves		516,625	445,202	495,148	391,056
Net proved undeveloped reserves		660,960	652,394	644,602	509,484
Proved Developed Reserves [Rollforward]
Net proved reserves - beginning of period	[1]	1,097,596	1,139,750	900,540
Revisions of previous estimates	[1]	42,955	(114,925)	28,022
Purchases in place	[1]	25,795	35,922	9,705
Extensions, discoveries and other additions	[1]	123,441	141,386	319,554
Sales in place	[1]	(8,791)	(740)	(12,623)
Production	[1]	(103,411)	(103,797)	(105,448)
Net proved reserves - end of period	[1]	1,177,585	1,097,596	1,139,750
Natural Gas Liquids (MBbl)
Reserve Quantities [Line Items]
Net proved developed reserves		230,219	205,898	264,749	200,860
Net proved undeveloped reserves		186,147	176,977	202,319	176,346
Proved Developed Reserves [Rollforward]
Net proved reserves - beginning of period	[1]	382,875	467,068	377,206
Revisions of previous estimates	[1]	53,771	(113,222)	27,443
Purchases in place	[1]	1,284	8,251	1,812
Extensions, discoveries and other additions	[1]	41,862	49,147	91,683
Sales in place	[1]	(33,548)	(271)	(1,779)
Production	[1]	(29,878)	(28,098)	(29,297)
Net proved reserves - end of period	[1]	416,366	382,875	467,068
Natural Gas (MMcf)
Reserve Quantities [Line Items]
Net proved developed reserves | MMcf		2,082,400	2,528,300	3,528,300	3,213,400
Net proved undeveloped reserves | MMcf		1,235,500	1,297,600	1,814,300	1,831,400
Proved Developed Reserves [Rollforward]
Net proved reserves - beginning of period | MMcf	[2]	3,825,900	5,342,600	5,044,800
Revisions of previous estimates | MMcf	[2]	333,100	(1,430,700)	270,600
Purchases in place | MMcf	[2]	91,500	72,300	17,100
Extensions, discoveries and other additions | MMcf	[2]	262,000	332,400	647,500
Sales in place | MMcf	[2]	(752,000)	(15,000)	(131,100)
Production | MMcf	[2]	(442,600)	(475,700)	(506,300)
Net proved reserves - end of period | MMcf	[2]	3,317,900	3,825,900	5,342,600
Oil Equivalents (MBoe)
Reserve Quantities [Line Items]
Net proved undeveloped reserve (MBOE) | MBoe		1,053,027	1,045,640	1,149,309	991,067
Proved Developed Reserves (MBoe) [Roll Forward]
Net proved reserves - beginning of period | MBoe	[1]	2,118,117	2,497,256	2,118,543
Revisions of previous estimates | MBoe	[1]	152,242	(466,604)	100,568
Purchases in place | MBoe	[1]	42,330	56,215	14,367
Extensions, discoveries and other additions | MBoe	[1]	208,963	245,931	519,167
Sales in place | MBoe	[1]	(167,669)	(3,506)	(36,263)
Production | MBoe	[1]	(207,050)	(211,175)	(219,126)
Net proved reserves - end of period | MBoe	[1]	2,146,933	2,118,117	2,497,256
United States
Reserve Quantities [Line Items]
Net proved developed reserves (MBOE) | MBoe		1,038,483	1,018,491	1,275,447	1,015,359
United States | Crude Oil (MBbl)
Reserve Quantities [Line Items]
Net proved developed reserves		507,531	444,070	493,694	382,517
Net proved undeveloped reserves		660,960	643,790	635,988	497,532
Proved Developed Reserves [Rollforward]
Net proved reserves - beginning of period	[1]	1,087,860	1,129,682	880,049
Revisions of previous estimates	[1]	42,040	(114,924)	28,301
Purchases in place	[1]	25,795	35,922	9,705
Extensions, discoveries and other additions	[1]	123,441	141,310	319,540
Sales in place	[1]	(8,791)	(730)	(4,967)
Production	[1]	(101,854)	(103,400)	(102,946)
Net proved reserves - end of period	[1]	1,168,491	1,087,860	1,129,682
United States | Natural Gas Liquids (MBbl)
Reserve Quantities [Line Items]
Net proved developed reserves		230,219	205,898	264,611	199,964
Net proved undeveloped reserves		186,147	176,977	202,319	176,038
Proved Developed Reserves [Rollforward]
Net proved reserves - beginning of period	[1]	382,875	466,930	376,002
Revisions of previous estimates	[1]	53,771	(113,290)	27,450
Purchases in place	[1]	1,284	8,251	1,812
Extensions, discoveries and other additions	[1]	41,862	49,147	91,683
Sales in place	[1]	(33,548)	(84)	(956)
Production	[1]	(29,878)	(28,079)	(29,061)
Net proved reserves - end of period	[1]	416,366	382,875	466,930
United States | Natural Gas (MMcf)
Reserve Quantities [Line Items]
Net proved developed reserves | MMcf		1,804,400	2,211,200	3,102,800	2,597,300
Net proved undeveloped reserves | MMcf		1,216,800	1,278,600	1,802,700	1,801,400
Proved Developed Reserves [Rollforward]
Net proved reserves - beginning of period | MMcf	[2]	3,489,800	4,905,500	4,398,700
Revisions of previous estimates | MMcf	[2]	298,400	(1,453,100)	252,200
Purchases in place | MMcf	[2]	91,500	72,300	17,100
Extensions, discoveries and other additions | MMcf	[2]	202,100	306,300	638,300
Sales in place | MMcf	[2]	(752,000)	(3,900)	(52,400)
Production | MMcf	[2]	(308,600)	(337,300)	(348,400)
Net proved reserves - end of period | MMcf	[2]	3,021,200	3,489,800	4,905,500
United States | Oil Equivalents (MBoe)
Reserve Quantities [Line Items]
Net proved undeveloped reserve (MBOE) | MBoe		1,049,909	1,033,870	1,138,755	973,807
Proved Developed Reserves (MBoe) [Roll Forward]
Net proved reserves - beginning of period | MBoe	[1]	2,052,361	2,414,202	1,989,166
Revisions of previous estimates | MBoe	[1]	145,542	(470,401)	97,782
Purchases in place | MBoe	[1]	42,330	56,215	14,367
Extensions, discoveries and other additions | MBoe	[1]	198,973	241,513	517,613
Sales in place | MBoe	[1]	(167,669)	(1,467)	(14,661)
Production | MBoe	[1]	(183,145)	(187,701)	(190,065)
Net proved reserves - end of period | MBoe	[1]	2,088,392	2,052,361	2,414,202
Trinidad
Reserve Quantities [Line Items]
Net proved developed reserves (MBOE) | MBoe		44,543	50,677	67,484	83,933
Trinidad | Crude Oil (MBbl)
Reserve Quantities [Line Items]
Net proved developed reserves		839	1,069	1,339	1,505
Net proved undeveloped reserves		0	0	0	85
Proved Developed Reserves [Rollforward]
Net proved reserves - beginning of period	[1]	1,069	1,339	1,590
Revisions of previous estimates	[1]	54	(1)	99
Purchases in place	[1]	0	0	0
Extensions, discoveries and other additions	[1]	0	63	0
Sales in place	[1]	0	0	0
Production	[1]	(284)	(332)	(350)
Net proved reserves - end of period	[1]	839	1,069	1,339
Trinidad | Natural Gas Liquids (MBbl)
Reserve Quantities [Line Items]
Net proved developed reserves		0	0	0	0
Net proved undeveloped reserves		0	0	0	0
Proved Developed Reserves [Rollforward]
Net proved reserves - beginning of period	[1]	0	0	0
Revisions of previous estimates	[1]	0	0	0
Purchases in place	[1]	0	0	0
Extensions, discoveries and other additions	[1]	0	0	0
Sales in place	[1]	0	0	0
Production	[1]	0	0	0
Net proved reserves - end of period	[1]	0	0	0
Trinidad | Natural Gas (MMcf)
Reserve Quantities [Line Items]
Net proved developed reserves | MMcf		262,200	297,600	396,900	494,600
Net proved undeveloped reserves | MMcf		18,700	19,000	8,700	26,100
Proved Developed Reserves [Rollforward]
Net proved reserves - beginning of period | MMcf	[2]	316,600	405,600	520,700
Revisions of previous estimates | MMcf	[2]	29,500	16,800	12,900
Purchases in place | MMcf	[2]	0	0	0
Extensions, discoveries and other additions | MMcf	[2]	59,900	21,700	4,500
Sales in place | MMcf	[2]	0	0	0
Production | MMcf	[2]	(125,100)	(127,500)	(132,500)
Net proved reserves - end of period | MMcf	[2]	280,900	316,600	405,600
Trinidad | Oil Equivalents (MBoe)
Reserve Quantities [Line Items]
Net proved undeveloped reserve (MBOE) | MBoe		3,118	3,166	1,453	4,431
Proved Developed Reserves (MBoe) [Roll Forward]
Net proved reserves - beginning of period | MBoe	[1]	53,843	68,937	88,364
Revisions of previous estimates | MBoe	[1]	4,978	2,802	2,245
Purchases in place | MBoe	[1]	0	0	0
Extensions, discoveries and other additions | MBoe	[1]	9,990	3,682	758
Sales in place | MBoe	[1]	0	0	0
Production | MBoe	[1]	(21,150)	(21,578)	(22,430)
Net proved reserves - end of period | MBoe	[1]	47,661	53,843	68,937
Other International
Reserve Quantities [Line Items]
Net proved developed reserves (MBOE) | MBoe	[3]	10,880	3,309	5,016	28,184
Other International | Crude Oil (MBbl)
Reserve Quantities [Line Items]
Net proved developed reserves	[3]	8,255	63	115	7,034
Net proved undeveloped reserves	[3]	0	8,604	8,614	11,867
Proved Developed Reserves [Rollforward]
Net proved reserves - beginning of period	[1],[3]	8,667	8,729	18,901
Revisions of previous estimates	[1],[3]	861	0	(378)
Purchases in place	[1],[3]	0	0	0
Extensions, discoveries and other additions	[1],[3]	0	13	14
Sales in place	[1],[3]	0	(10)	(7,656)
Production	[1],[3]	(1,273)	(65)	(2,152)
Net proved reserves - end of period	[1],[3]	8,255	8,667	8,729
Other International | Natural Gas Liquids (MBbl)
Reserve Quantities [Line Items]
Net proved developed reserves	[3]	0	0	138	896
Net proved undeveloped reserves	[3]	0	0	0	308
Proved Developed Reserves [Rollforward]
Net proved reserves - beginning of period	[1],[3]	0	138	1,204
Revisions of previous estimates	[1],[3]	0	68	(7)
Purchases in place	[1],[3]	0	0	0
Extensions, discoveries and other additions	[1],[3]	0	0	0
Sales in place	[1],[3]	0	(187)	(823)
Production	[1],[3]	0	(19)	(236)
Net proved reserves - end of period	[1],[3]	0	0	138
Other International | Natural Gas (MMcf)
Reserve Quantities [Line Items]
Net proved developed reserves | MMcf	[3]	15,800	19,500	28,600	121,500
Net proved undeveloped reserves | MMcf	[3]	0	0	2,900	3,900
Proved Developed Reserves [Rollforward]
Net proved reserves - beginning of period | MMcf	[2],[3]	19,500	31,500	125,400
Revisions of previous estimates | MMcf	[2],[3]	5,200	5,600	5,500
Purchases in place | MMcf	[2],[3]	0	0	0
Extensions, discoveries and other additions | MMcf	[2],[3]	0	4,400	4,700
Sales in place | MMcf	[2],[3]	0	(11,100)	(78,700)
Production | MMcf	[2],[3]	(8,900)	(10,900)	(25,400)
Net proved reserves - end of period | MMcf	[2],[3]	15,800	19,500	31,500
Other International | Oil Equivalents (MBoe)
Reserve Quantities [Line Items]
Net proved undeveloped reserve (MBOE) | MBoe	[3]	0	8,604	9,101	12,829
Proved Developed Reserves (MBoe) [Roll Forward]
Net proved reserves - beginning of period | MBoe	[1],[3]	11,913	14,117	41,013
Revisions of previous estimates | MBoe	[1],[3]	1,722	995	541
Purchases in place | MBoe	[1],[3]	0	0	0
Extensions, discoveries and other additions | MBoe	[1],[3]	0	736	796
Sales in place | MBoe	[1],[3]	0	(2,039)	(21,602)
Production | MBoe	[1],[3]	(2,755)	(1,896)	(6,631)
Net proved reserves - end of period | MBoe	[1],[3]	10,880	11,913	14,117

[1] Thousand barrels or thousand barrels of oil equivalent, as applicable; oil equivalents include crude oil and condensate, NGLs and natural gas. Oil equivalents are determined using a ratio of 1.0 barrel of crude oil and condensate or NGLs to 6.0 thousand cubic feet of natural gas.

[2] Billion cubic feet.

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