| Name | AdditionalInformationNecessaryToPreventDisclosureOfDiscountsFutureNetCashFlowsFromBeingMisleading |
|---|---|
| Namespace | http://fasb.org/srt/2020-01-31 |
| Prefix | srt |
| Data type | xbrli:stringItemType |
| Period type | duration |
| Substitution Group | xbrli:item |
| Balance | None |
| Nillable | True |
| Abstract | False |
| Text | Lang | Role | Container role |
|---|---|---|---|
| Additional Information Necessary to Prevent Disclosure of Discounts Future Net Cash Flows from Being Misleading | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Additional information necessary to prevent the disclosure of the standardized measure of discounted future net cash flows and changes therein from being misleading. | 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 | 2017-11 | 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 | 36 | http://www.xbrl.org/2003/role/disclosureRef |
| URI | http://asc.fasb.org/extlink&oid=68064819&loc=d3e62536-109447 | 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:PrincipalSourcesOfChangeInStandardizedMeasureOfDiscountedFutureNetCashFlowRelatingToProvedOilAndGasReservesAbstract | parent-child | http://fasb.org/us-gaap/role/disclosure/ExtractiveIndustries |