v3.6.0.2
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.