| Name | ProvedDevelopedAndUndevelopedReserveNetEnergy |
|---|---|
| Namespace | http://fasb.org/srt/2020-01-31 |
| Prefix | srt |
| Data type | num:energyItemType |
| Period type | instant |
| Substitution Group | xbrli:item |
| Balance | None |
| Nillable | True |
| Abstract | False |
| Text | Lang | Role | Container role |
|---|---|---|---|
| Proved Developed and Undeveloped Reserve, Net (Energy) | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Proved Developed and Undeveloped Reserve, Net (Energy), Beginning Balance | en-US | http://www.xbrl.org/2003/role/periodStartLabel | http://www.xbrl.org/2003/role/link |
| Proved Developed and Undeveloped Reserve, Net (Energy), Ending Balance | en-US | http://www.xbrl.org/2003/role/periodEndLabel | http://www.xbrl.org/2003/role/link |
| Energy measure of proved reserve of oil and gas, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe). | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Name | Value | Role |
|---|---|---|
| TaxonomyVersion | 2018 | http://fasb.org/srt/role/changeNote/changeNote |
| ChangeDate | 2017-08 | http://fasb.org/srt/role/changeNote/changeNote |
| ModifiedReferences | true | http://fasb.org/srt/role/changeNote/changeNote |
| Publisher | FASB | http://www.xbrl.org/2003/role/disclosureRef |
| Name | Accounting Standards Codification | http://www.xbrl.org/2003/role/disclosureRef |
| Topic | 932 | http://www.xbrl.org/2003/role/disclosureRef |
| SubTopic | 235 | http://www.xbrl.org/2003/role/disclosureRef |
| Section | 50 | http://www.xbrl.org/2003/role/disclosureRef |
| Paragraph | 4 | http://www.xbrl.org/2003/role/disclosureRef |
| URI | http://asc.fasb.org/extlink&oid=68064819&loc=d3e61797-109447 | http://www.xbrl.org/2003/role/disclosureRef |
| Publisher | SEC | http://www.xbrl.org/2003/role/disclosureRef |
| Name | Form 20-F | http://www.xbrl.org/2003/role/disclosureRef |
| Section | Item 18 | http://www.xbrl.org/2003/role/disclosureRef |
| Subsection | Instruction 2 | http://www.xbrl.org/2003/role/disclosureRef |
| Name | Relation Type | Role | |
|---|---|---|---|
srt:ProvedDevelopedAndUndevelopedReserveEnergyRollForward | parent-child | http://fasb.org/us-gaap/role/disclosure/ExtractiveIndustries | |
srt:ProvedDevelopedAndUndevelopedReserveEnergyRollForward | parent-child | http://fasb.org/us-gaap/role/disclosure/ExtractiveIndustries | |
srt:ProvedDevelopedAndUndevelopedReserveEnergyRollForward | domain-member | http://fasb.org/us-gaap/role/disclosure/ExtractiveIndustriesProvedDevelopedAndUndevelopedOilAndGasReserveQuantitiesTable |