v3.6.0.2
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.