| Name | ProvedDevelopedReservesBOE1 |
|---|---|
| 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 Reserves (Energy) | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Energy measure of interests in proved developed reserves of 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. | 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:ReserveQuantitiesLineItems | parent-child | http://fasb.org/us-gaap/role/disclosure/ExtractiveIndustries | |
srt:ReserveQuantitiesLineItems | domain-member | http://fasb.org/us-gaap/role/disclosure/ExtractiveIndustriesProvedDevelopedAndUndevelopedOilAndGasReserveQuantitiesTable |