v2.4.0.6

Oil and Gas Exploration and Production Industries Disclosures (Details) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2012 Boe | Dec. 31, 2011 Boe | Dec. 31, 2010 Boe | Dec. 31, 2009 Boe
Proved Developed And Undeveloped Reserves (MBoe) [Rollforward] |  |  |  |
Net proved reserves - beginning of period (MBoe) | 2,053,763 | 1,949,535 | 1,796,019 |
Revisions of previous estimates (MBoe) | (392,621) | (59,163) | (38,404) |
Purchases in place (MBoe) | 4,098 | 521 | 14 |
Extensions, discoveries and other additions (MBoe) | 406,932 | 387,255 | 395,984 |
Sales in place (MBoe) | (90,420) | (68,247) | (60,148) |
Production (MBoe) | (171,054) | (156,138) | (143,930) |
Net proved reserves - end of period (MBoe) | 1,810,698 | 2,053,763 | 1,949,535 |
Net Proved Developed and Undeveloped Reserves [Abstract] |  |  |  |
Net Proved Developed Reserves (BOE) | 949,819 | 1,042,713 | 1,012,987 | 976,374
Net Proved Undeveloped Reserve (BOE) | 860,879 | 1,011,050 | 936,548 | 819,646
Revision of Proved Reserves Due to Decrease or Increase in the Average Natural Gas Price for the Year as Compared to Prior Year (stated in MMBoe) | (531) | (16) | 28 |
Revisions of Proved Undeveloped Reserves (stated in MMBoe) | (293) | (7) | (12) |
Sales in Place of Proved Undeveloped Reserves (stated in MMBoe) | 19 | 9 | 8 |
Proved Undeveloped Reserves Drilled and Transferred to Proved Developed Reserves (stated in MMBoe) | 138 | 144 | 118 |
Capitalized Costs Related to Proved Undeveloped Reserves Drilled and Transferred to Proved Developed Reserves | $ 2,764,000,000 | $ 1,619,000,000 | $ 1,280,000,000 |
Capitalized Costs, Oil and Gas Producing Activities, Gross [Abstract] |  |  |  |
Proved properties | 36,872,434,000 | 32,353,380,000 |  |
Unproved properties | 1,253,864,000 | 1,311,055,000 |  |
Total | 38,126,298,000 | 33,664,435,000 |  |
Accumulated depreciation, depletion and amortization | (16,849,068,000) | (13,981,143,000) |  |
Net capitalized costs | $ 21,277,230,000 | $ 19,683,292,000 |  |
Crude Oil (MBbl) [Member] |  |  |  |
Proved Developed and Undeveloped Reserves [Rollforward] |  |  |  |
Net proved reserves - beginning of period | 517,493 | 385,922 | 219,539 |
Revisions of previous estimates | 1,688 | (25,756) | (9,151) |
Purchases in place | 1,010 | 9 | 13 |
Extensions, discoveries and other additions | 255,686 | 203,001 | 204,476 |
Sales in place | (17,264) | (4,301) | (1,671) |
Production | (57,795) | (41,382) | (27,284) |
Net proved reserves - end of period | 700,818 | 517,493 | 385,922 |
Natural Gas Liquids (MBbl) [Member] |  |  |  |
Proved Developed and Undeveloped Reserves [Rollforward] |  |  |  |
Net proved reserves - beginning of period | 227,788 | 151,909 | 93,461 |
Revisions of previous estimates | 47,856 | 36,042 | 27,294 |
Purchases in place | 612 | 17 | 0 |
Extensions, discoveries and other additions | 71,574 | 65,288 | 42,242 |
Sales in place | (7,377) | (10,008) | (8) |
Production | (20,490) | (15,460) | (11,080) |
Net proved reserves - end of period | 319,963 | 227,788 | 151,909 |
Natural Gas (Bcf) [Member] |  |  |  |
Proved Developed and Undeveloped Reserves [Rollforward] |  |  |  |
Net proved reserves - beginning of period | 7,850.9 | 8,470.2 | 8,898.1 |
Revisions of previous estimates | (2,653) | (416.7) | (339.3) |
Purchases in place | 14.8 | 3.0 | 0 |
Extensions, discoveries and other additions | 478.1 | 713.8 | 895.6 |
Sales in place | (394.7) | (323.6) | (350.8) |
Production | (556.6) | (595.8) | (633.4) |
Net proved reserves - end of period | 4,739.5 | 7,850.9 | 8,470.2 |
Net Proved Developed and Undeveloped Reserves [Abstract] |  |  |  |
Net proved developed reserves | 2,979.5 | 4,155.6 | 4,457.8 | 4,633.2
Net proved undeveloped reserves | 1,760.0 | 3,695.3 | 4,012.4 | 4,264.9
Liquids (MBbl) [Member] |  |  |  |
Net Proved Developed and Undeveloped Reserves [Abstract] |  |  |  |
Net proved developed reserves | 453,242 | 350,118 | 270,017 | 204,177
Net proved undeveloped reserves | 567,538 | 395,163 | 267,814 | 108,823
United States [Member] |  |  |  |
Proved Developed And Undeveloped Reserves (MBoe) [Rollforward] |  |  |  |
Net proved reserves - beginning of period (MBoe) | 1,729,508 | 1,587,806 | 1,338,292 |
Revisions of previous estimates (MBoe) | (237,936) | (42,526) | (17,945) |
Purchases in place (MBoe) | 4,098 | 521 | 14 |
Extensions, discoveries and other additions (MBoe) | 392,196 | 373,602 | 378,582 |
Sales in place (MBoe) | (87,588) | (68,247) | (6,860) |
Production (MBoe) | (138,170) | (121,648) | (104,277) |
Net proved reserves - end of period (MBoe) | 1,662,108 | 1,729,508 | 1,587,806 |
Net Proved Developed and Undeveloped Reserves [Abstract] |  |  |  |
Net Proved Developed Reserves (BOE) | 840,564 | 877,301 | 839,928 | 744,339
Net Proved Undeveloped Reserve (BOE) | 821,544 | 852,207 | 747,878 | 593,953
United States [Member] | Crude Oil (MBbl) [Member] |  |  |  |
Proved Developed and Undeveloped Reserves [Rollforward] |  |  |  |
Net proved reserves - beginning of period | 495,296 | 355,457 | 188,452 |
Revisions of previous estimates | 4,105 | (21,188) | (8,313) |
Purchases in place | 1,010 | 9 | 13 |
Extensions, discoveries and other additions | 241,171 | 202,552 | 199,479 |
Sales in place | (15,921) | (4,301) | (1,082) |
Production | (54,632) | (37,233) | (23,092) |
Net proved reserves - end of period | 671,029 | 495,296 | 355,457 |
United States [Member] | Natural Gas Liquids (MBbl) [Member] |  |  |  |
Proved Developed and Undeveloped Reserves [Rollforward] |  |  |  |
Net proved reserves - beginning of period | 226,586 | 150,434 | 91,489 |
Revisions of previous estimates | 47,293 | 35,999 | 27,490 |
Purchases in place | 612 | 17 | 0 |
Extensions, discoveries and other additions | 71,396 | 65,288 | 42,221 |
Sales in place | (7,300) | (10,008) | (2) |
Production | (20,181) | (15,144) | (10,764) |
Net proved reserves - end of period | 318,406 | 226,586 | 150,434 |
United States [Member] | Natural Gas (Bcf) [Member] |  |  |  |
Proved Developed and Undeveloped Reserves [Rollforward] |  |  |  |
Net proved reserves - beginning of period | 6,045.8 | 6,491.5 | 6,350.1 |
Revisions of previous estimates | (1,736) | (344) | (222.7) |
Purchases in place | 14.8 | 3.0 | 0 |
Extensions, discoveries and other additions | 477.8 | 634.6 | 821.3 |
Sales in place | (386.2) | (323.6) | (34.6) |
Production | (380.2) | (415.7) | (422.6) |
Net proved reserves - end of period | 4,036.0 | 6,045.8 | 6,491.5 |
Net Proved Developed and Undeveloped Reserves [Abstract] |  |  |  |
Net proved developed reserves | 2,387.5 | 3,234.9 | 3,519.7 | 3,330.1
Net proved undeveloped reserves | 1,648.5 | 2,810.8 | 2,971.7 | 3,020.0
United States [Member] | Liquids (MBbl) [Member] |  |  |  |
Net Proved Developed and Undeveloped Reserves [Abstract] |  |  |  |
Net proved developed reserves | 442,648 | 338,144 | 253,308 | 189,322
Net proved undeveloped reserves | 546,786 | 383,739 | 252,583 | 90,619
Canada [Member] |  |  |  |
Proved Developed And Undeveloped Reserves (MBoe) [Rollforward] |  |  |  |
Net proved reserves - beginning of period (MBoe) | 192,448 | 216,084 | 285,808 |
Revisions of previous estimates (MBoe) | (151,015) | (12,865) | (5,288) |
Purchases in place (MBoe) | 0 | 0 | 0 |
Extensions, discoveries and other additions (MBoe) | 5,860 | 448 | 3,789 |
Sales in place (MBoe) | (2,832) | 0 | (53,288) |
Production (MBoe) | (8,657) | (11,219) | (14,937) |
Net proved reserves - end of period (MBoe) | 35,804 | 192,448 | 216,084 |
Net Proved Developed and Undeveloped Reserves [Abstract] |  |  |  |
Net Proved Developed Reserves (BOE) | 24,348 | 58,524 | 79,701 | 124,323
Net Proved Undeveloped Reserve (BOE) | 11,456 | 133,924 | 136,383 | 161,486
Canada [Member] | Crude Oil (MBbl) [Member] |  |  |  |
Proved Developed and Undeveloped Reserves [Rollforward] |  |  |  |
Net proved reserves - beginning of period | 18,592 | 25,636 | 25,586 |
Revisions of previous estimates | (2,493) | (4,611) | (104) |
Purchases in place | 0 | 0 | 0 |
Extensions, discoveries and other additions | 5,681 | 449 | 3,198 |
Sales in place | (1,343) | 0 | (589) |
Production | (2,574) | (2,882) | (2,455) |
Net proved reserves - end of period | 17,863 | 18,592 | 25,636 |
Canada [Member] | Natural Gas Liquids (MBbl) [Member] |  |  |  |
Proved Developed and Undeveloped Reserves [Rollforward] |  |  |  |
Net proved reserves - beginning of period | 1,202 | 1,475 | 1,972 |
Revisions of previous estimates | 563 | 43 | (196) |
Purchases in place | 0 | 0 | 0 |
Extensions, discoveries and other additions | 178 | 0 | 21 |
Sales in place | (77) | 0 | (6) |
Production | (309) | (316) | (316) |
Net proved reserves - end of period | 1,557 | 1,202 | 1,475 |
Canada [Member] | Natural Gas (Bcf) [Member] |  |  |  |
Proved Developed and Undeveloped Reserves [Rollforward] |  |  |  |
Net proved reserves - beginning of period | 1,035.9 | 1,133.8 | 1,549.5 |
Revisions of previous estimates | (894.5) | (49.8) | (29.9) |
Purchases in place | 0 | 0 | 0 |
Extensions, discoveries and other additions | 0 | 0 | 3.4 |
Sales in place | (8.5) | 0 | (316.2) |
Production | (34.6) | (48.1) | (73) |
Net proved reserves - end of period | 98.3 | 1,035.9 | 1,133.8 |
Net Proved Developed and Undeveloped Reserves [Abstract] |  |  |  |
Net proved developed reserves | 98.3 | 295.8 | 401.6 | 681.0
Net proved undeveloped reserves | 0 | 740.1 | 732.2 | 868.5
Canada [Member] | Liquids (MBbl) [Member] |  |  |  |
Net Proved Developed and Undeveloped Reserves [Abstract] |  |  |  |
Net proved developed reserves | 7,963 | 9,220 | 12,758 | 10,831
Net proved undeveloped reserves | 11,456 | 10,574 | 14,352 | 16,727
Trinidad [Member] |  |  |  |
Proved Developed And Undeveloped Reserves (MBoe) [Rollforward] |  |  |  |
Net proved reserves - beginning of period (MBoe) | 128,629 | 142,669 | 169,747 |
Revisions of previous estimates (MBoe) | (3,953) | (4,011) | (15,513) |
Purchases in place (MBoe) | 0 | 0 | 0 |
Extensions, discoveries and other additions (MBoe) | 0 | 12,455 | 12,250 |
Sales in place (MBoe) | 0 | 0 | 0 |
Production (MBoe) | (23,616) | (22,484) | (23,815) |
Net proved reserves - end of period (MBoe) | 101,060 | 128,629 | 142,669 |
Net Proved Developed and Undeveloped Reserves [Abstract] |  |  |  |
Net Proved Developed Reserves (BOE) | 81,826 | 103,710 | 90,382 | 105,540
Net Proved Undeveloped Reserve (BOE) | 19,234 | 24,919 | 52,287 | 64,207
Trinidad [Member] | Crude Oil (MBbl) [Member] |  |  |  |
Proved Developed and Undeveloped Reserves [Rollforward] |  |  |  |
Net proved reserves - beginning of period | 3,507 | 4,731 | 5,443 |
Revisions of previous estimates | 71 | 18 | (754) |
Purchases in place | 0 | 0 | 0 |
Extensions, discoveries and other additions | 0 | 0 | 1,751 |
Sales in place | 0 | 0 | 0 |
Production | (550) | (1,242) | (1,709) |
Net proved reserves - end of period | 3,028 | 3,507 | 4,731 |
Trinidad [Member] | Natural Gas Liquids (MBbl) [Member] |  |  |  |
Proved Developed and Undeveloped Reserves [Rollforward] |  |  |  |
Net proved reserves - beginning of period | 0 | 0 | 0 |
Revisions of previous estimates | 0 | 0 | 0 |
Purchases in place | 0 | 0 | 0 |
Extensions, discoveries and other additions | 0 | 0 | 0 |
Sales in place | 0 | 0 | 0 |
Production | 0 | 0 | 0 |
Net proved reserves - end of period | 0 | 0 | 0 |
Trinidad [Member] | Natural Gas (Bcf) [Member] |  |  |  |
Proved Developed and Undeveloped Reserves [Rollforward] |  |  |  |
Net proved reserves - beginning of period | 750.7 | 827.6 | 985.8 |
Revisions of previous estimates | (24.1) | (24.2) | (88.6) |
Purchases in place | 0 | 0 | 0 |
Extensions, discoveries and other additions | 0 | 74.7 | 63.0 |
Sales in place | 0 | 0 | 0 |
Production | (138.4) | (127.4) | (132.6) |
Net proved reserves - end of period | 588.2 | 750.7 | 827.6 |
Net Proved Developed and Undeveloped Reserves [Abstract] |  |  |  |
Net proved developed reserves | 476.7 | 606.3 | 519.2 | 609.4
Net proved undeveloped reserves | 111.5 | 144.4 | 308.5 | 376.4
Trinidad [Member] | Liquids (MBbl) [Member] |  |  |  |
Net Proved Developed and Undeveloped Reserves [Abstract] |  |  |  |
Net proved developed reserves | 2,378 | 2,657 | 3,853 | 3,966
Net proved undeveloped reserves | 651 | 850 | 879 | 1,477
Other International [Member] |  |  |  |
Proved Developed And Undeveloped Reserves (MBoe) [Rollforward] |  |  |  |
Net proved reserves - beginning of period (MBoe) | 3,178 | 2,976 | 2,172 |
Revisions of previous estimates (MBoe) | 283 | 239 | 342 |
Purchases in place (MBoe) | 0 | 0 | 0 |
Extensions, discoveries and other additions (MBoe) | 8,876 | 750 | 1,363 |
Sales in place (MBoe) | 0 | 0 | 0 |
Production (MBoe) | (611) | (787) | (901) |
Net proved reserves - end of period (MBoe) | 11,726 | 3,178 | 2,976 |
Net Proved Developed and Undeveloped Reserves [Abstract] |  |  |  |
Net Proved Developed Reserves (BOE) | 3,081 | 3,178 | 2,976 | 2,172
Net Proved Undeveloped Reserve (BOE) | 8,645 | 0 | 0 | 0
Other International [Member] | Crude Oil (MBbl) [Member] |  |  |  |
Proved Developed and Undeveloped Reserves [Rollforward] |  |  |  |
Net proved reserves - beginning of period | 98 | 98 | 58 |
Revisions of previous estimates | 5 | 25 | 20 |
Purchases in place | 0 | 0 | 0 |
Extensions, discoveries and other additions | 8,834 | 0 | 48 |
Sales in place | 0 | 0 | 0 |
Production | (39) | (25) | (28) |
Net proved reserves - end of period | 8,898 | 98 | 98 |
Other International [Member] | Natural Gas Liquids (MBbl) [Member] |  |  |  |
Proved Developed and Undeveloped Reserves [Rollforward] |  |  |  |
Net proved reserves - beginning of period | 0 | 0 | 0 |
Revisions of previous estimates | 0 | 0 | 0 |
Purchases in place | 0 | 0 | 0 |
Extensions, discoveries and other additions | 0 | 0 | 0 |
Sales in place | 0 | 0 | 0 |
Production | 0 | 0 | 0 |
Net proved reserves - end of period | 0 | 0 | 0 |
Other International [Member] | Natural Gas (Bcf) [Member] |  |  |  |
Proved Developed and Undeveloped Reserves [Rollforward] |  |  |  |
Net proved reserves - beginning of period | 18.5 | 17.3 | 12.7 |
Revisions of previous estimates | 1.6 | 1.3 | 1.9 |
Purchases in place | 0 | 0 | 0 |
Extensions, discoveries and other additions | 0.3 | 4.5 | 7.9 |
Sales in place | 0 | 0 | 0 |
Production | (3.4) | (4.6) | (5.2) |
Net proved reserves - end of period | 17.0 | 18.5 | 17.3 |
Net Proved Developed and Undeveloped Reserves [Abstract] |  |  |  |
Net proved developed reserves | 17.0 | 18.6 | 17.3 | 12.7
Net proved undeveloped reserves | 0 | 0 | 0 | 0
Other International [Member] | Liquids (MBbl) [Member] |  |  |  |
Net Proved Developed and Undeveloped Reserves [Abstract] |  |  |  |
Net proved developed reserves | 253 | 97 | 98 | 58
Net proved undeveloped reserves | 8,645 | 0 | 0 | 0

X
- Definition Capitalized Costs Related to Proved Undeveloped Reserves Drilled and Transferred to Proved Developed Reserves + References No definition available. + Details
Name: | eog_CapitalizedCostsRelatedToProvedUndevelopedReservesDrilledAndTransferredToProvedDevelopedReserves
Namespace Prefix: | eog_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | eog_IncreaseDecreaseInProvedDevelopedAndUndevelopedReservesBoeAbstract
Namespace Prefix: | eog_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | eog_NetProvedDevelopedAndUndevelopedReservesAbstract
Namespace Prefix: | eog_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Additions to proved reserves that result from (1) extension of the proved acreage of previously discovered (old) reservoirs through additional drilling in periods after discovery and (2) discovery of new fields with proved reserves or of new reservoirs of proved reserves in old fields + References No definition available. + Details
Name: | eog_ProvedDevelopedAndUndevelopedReservesExtensionsDiscoveriesAndAdditionsBoe
Namespace Prefix: | eog_
Data Type: | us-types:boeItemType
Balance Type: | na
Period Type: | duration

X
- Definition The net quantity of proved reserves as of the balance sheet date. Proved oil reserves are the estimated quantities of crude oil and natural gas liquids which geological and engineering data demonstrate with reasonable certainty to be recoverable. + References No definition available. + Details
Name: | eog_ProvedDevelopedAndUndevelopedReservesNetBoe
Namespace Prefix: | eog_
Data Type: | us-types:boeItemType
Balance Type: | na
Period Type: | instant

X
- Definition Production of proved reserves. + References No definition available. + Details
Name: | eog_ProvedDevelopedAndUndevelopedReservesProductionBoe
Namespace Prefix: | eog_
Data Type: | us-types:boeItemType
Balance Type: | na
Period Type: | duration

X
- Definition Purchase of minerals in place. + References No definition available. + Details
Name: | eog_ProvedDevelopedAndUndevelopedReservesPurchasesOfMineralsInPlaceBoe
Namespace Prefix: | eog_
Data Type: | us-types:boeItemType
Balance Type: | na
Period Type: | duration

X
- Definition Revisions represent changes in previous estimates of proved reserves, either upward or downward, resulting from new information (except for an increase in proved acreage) normally obtained from development drilling and production history or resulting from change in economic factors. + References No definition available. + Details
Name: | eog_ProvedDevelopedAndUndevelopedReservesRevisionsOfPreviousEstimatesIncreaseDecreaseBoe
Namespace Prefix: | eog_
Data Type: | us-types:boeItemType
Balance Type: | na
Period Type: | duration

X
- Definition Sales of minerals in place. + References No definition available. + Details
Name: | eog_ProvedDevelopedAndUndevelopedReservesSalesOfMineralsInPlaceBoe
Namespace Prefix: | eog_
Data Type: | us-types:boeItemType
Balance Type: | na
Period Type: | duration

X
- Definition Proved Undeveloped Reserves Drilled and Transferred to Proved Developed Reserves (stated in MMBoe) + References No definition available. + Details
Name: | eog_ProvedUndevelopedReservesDrilledAndTransferredToProvedDevelopedReserves
Namespace Prefix: | eog_
Data Type: | us-types:boeItemType
Balance Type: | na
Period Type: | instant

X
- Definition Revision of Proved Reserves Due to Decrease or Increase in the Average Natural Gas Price for the Year as Compared to Prior Year (stated in MMBoe) + References No definition available. + Details
Name: | eog_RevisionOfProvedReservesDueToDecreaseOrIncreaseInAverageNaturalGasPriceForYearAsComparedToPriorYearStatedInMmboe
Namespace Prefix: | eog_
Data Type: | us-types:boeItemType
Balance Type: | na
Period Type: | instant

X
- Definition Revisions of Proved Undeveloped Reserves (stated in MMBoe) + References No definition available. + Details
Name: | eog_RevisionsOfProvedUndevelopedReservesStatedInMmboe
Namespace Prefix: | eog_
Data Type: | us-types:boeItemType
Balance Type: | na
Period Type: | instant

X
- Definition Sales in Place of Proved Undeveloped Reserves (stated in MMBoe) + References No definition available. + Details
Name: | eog_SalesInPlaceOfProvedUndevelopedReservesStatedInMmboe
Namespace Prefix: | eog_
Data Type: | us-types:boeItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of accumulated depreciation, depletion, amortization and valuation allowance relating to oil and gas producing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61901-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 19 -Paragraph 59M -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The sum of capitalized costs relating to oil and gas producing activities before accounting for accumulated depreciation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61901-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 19 -Paragraph 59M -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_CapitalizedCostsOilAndGasProducingActivitiesGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_CapitalizedCostsOilAndGasProducingActivitiesGrossAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Net amount of capitalized costs relating to oil and gas producing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61901-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 19 -Paragraph 59M -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_CapitalizedCostsOilAndGasProducingActivitiesNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Capitalized costs of proved properties incurred for any combination mineral interests acquisitions; wells and related equipment; support equipment and facilities; and uncompleted wells and equipment and other costs not previously disclosed within this table. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 19 -Paragraph 59M -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 360 -Glossary Proved Properties -URI http://asc.fasb.org/extlink&oid=6522428 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61901-109447 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Properties -URI http://asc.fasb.org/extlink&oid=21914647 + Details
Name: | us-gaap_CapitalizedCostsProvedProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Capitalized costs of unproved properties incurred for any combination mineral interests acquisitions and other costs not previously disclosed within this table. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -Glossary Unproved Properties -URI http://asc.fasb.org/extlink&oid=6527831 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61901-109447 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Properties -URI http://asc.fasb.org/extlink&oid=21914647 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 19 -Paragraph 59M -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_CapitalizedCostsUnprovedProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_IncreaseDecreaseInProvedDevelopedAndUndevelopedReservesRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Additions to proved reserves that result from (1) extension of the proved acreage of previously discovered (old) reservoirs through additional drilling in periods after discovery and (2) discovery of new fields with proved reserves or of new reservoirs of proved reserves in old fields. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61831-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 19 -Paragraph 59F -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_ProvedDevelopedAndUndevelopedReservesExtensionsDiscoveriesAndAdditions
Namespace Prefix: | us-gaap_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | duration

X
- Definition The net quantity of proved reserves as of the balance sheet date. Proved oil reserves are the estimated quantities of crude oil and natural gas liquids which geological and engineering data demonstrate with reasonable certainty to be recoverable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 10 -Paragraph a -Subparagraph 2 -Article 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61831-109447 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10.(a)(2)) -URI http://asc.fasb.org/extlink&oid=21918352&loc=d3e511914-122862 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 19 -Paragraph 59F -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_ProvedDevelopedAndUndevelopedReservesNet
Namespace Prefix: | us-gaap_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | instant

X
- Definition Production of proved reserves. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 5 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61831-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 19 -Paragraph 59F -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_ProvedDevelopedAndUndevelopedReservesProduction
Namespace Prefix: | us-gaap_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | duration

X
- Definition Purchase of minerals in place. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61831-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 19 -Paragraph 59F -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_ProvedDevelopedAndUndevelopedReservesPurchasesOfMineralsInPlace
Namespace Prefix: | us-gaap_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | duration

X
- Definition Revisions represent changes in previous estimates of proved reserves, either upward or downward, resulting from new information (except for an increase in proved acreage) normally obtained from development drilling and production history or resulting from change in economic factors. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61831-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 19 -Paragraph 59F -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_ProvedDevelopedAndUndevelopedReservesRevisionsOfPreviousEstimatesIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | duration

X
- Definition Sales of minerals in place. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 5 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61831-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 19 -Paragraph 59F -Subparagraph f -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_ProvedDevelopedAndUndevelopedReservesSalesOfMineralsInPlace
Namespace Prefix: | us-gaap_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | duration

X
- Definition Net quantities of an enterprise's interests in proved developed reserves of either crude oil (including condensate and natural gas liquids), natural gas, synthetic oil and gas, or other nonrenewable natural resource that is intended to be upgraded into synthetic oil and gas as of the beginning and the end of the year. "Net" quantities of reserves include those relating to the enterprise's operating and nonoperating interests in properties. Quantities of reserves relating to royalty interests owned are included in "net" quantities if the necessary information is available to the enterprise. "Net" quantities do not include reserves relating to interests of others in properties owned by the enterprise. Measured in barrel of oil equivalent (BOE). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 19 -Paragraph 59E -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61797-109447 + Details
Name: | us-gaap_ProvedDevelopedReservesBOE
Namespace Prefix: | us-gaap_
Data Type: | us-types:boeItemType
Balance Type: | na
Period Type: | instant

X
- Definition Net quantities of an enterprise's interests in proved developed reserves of either crude oil (including condensate and natural gas liquids), natural gas, synthetic oil and gas, or other nonrenewable natural resource that is intended to be upgraded into synthetic oil and gas as of the beginning and the end of the year. "Net" quantities of reserves include those relating to the enterprise's operating and nonoperating interests in properties. Quantities of reserves relating to royalty interests owned are included in "net" quantities if the necessary information is available to the enterprise. "Net" quantities does not include reserves relating to interests of others in properties owned by the enterprise. The unit of measure for reserve quantities is defined as "barrels" for oil and synthetic oil reserves or "cubic feet" or "cubic meters" for natural gas and synthetic gas reserves. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61797-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61884-109447 + Details
Name: | us-gaap_ProvedDevelopedReservesVolume
Namespace Prefix: | us-gaap_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | instant

X
- Definition Net quantities of an enterprise's interests in proved undeveloped reserves of either crude oil (including condensate and natural gas liquids), natural gas, synthetic oil and gas, or other nonrenewable natural resource that is intended to be upgraded into synthetic oil and gas as of the beginning and the end of the year. "Net" quantities of reserves include those relating to the enterprise's operating and nonoperating interests in properties. Quantities of reserves relating to royalty interests owned are included in "net" quantities if the necessary information is available to the enterprise. "Net" quantities do not include reserves relating to interests of others in properties owned by the enterprise. Measured in barrel of oil equivalent (BOE). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 19 -Paragraph 59E -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61797-109447 + Details
Name: | us-gaap_ProvedUndevelopedReserveBOE
Namespace Prefix: | us-gaap_
Data Type: | us-types:boeItemType
Balance Type: | na
Period Type: | instant

X
- Definition Net quantities of an enterprise's interests in proved undeveloped reserves of either crude oil (including condensate and natural gas liquids), natural gas, synthetic oil and gas, or other renewable natural resource that is intended to be upgraded into synthetic oil and gas as of the beginning and the end of the year. "Net" quantities of reserves include those relating to the enterprise's operating and nonoperating interests in properties. Quantities of reserves relating to royalty interests owned are included in "net" quantities if the necessary information is available to the enterprise. "Net" quantities does not include reserves relating to interests of others in properties owned by the enterprise. The unit of measure for reserve quantities is defined as "barrels" for oil and synthetic oil reserves or "cubic feet" or "cubic meters" for natural gas and synthetic gas reserves. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61797-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61884-109447 + Details
Name: | us-gaap_ProvedUndevelopedReserveVolume
Namespace Prefix: | us-gaap_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | instant