| Standard label: | Wells and Related Equipment and Facilities [Member] |
| Name: | us-gaap:WellsAndRelatedEquipmentAndFacilitiesMember |
| Documentation: | Wells and the equipment and facilities used to drill and equip exploratory wells. Includes equipment that (a) drill and equip those exploratory wells and exploratory-type stratigraphic test wells that have found proved reserves; and (b) obtain access to proved reserves and provide facilities for extracting, treating, gathering, and storing the oil and gas, including the drilling and equipping of development wells and development-type stratigraphic test wells (whether those wells are successful or unsuccessful) and service wells. |
| Object type: | cm:Member |
| Data type: | [Member] (nonnum:domainItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | true |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:WellsAndRelatedEquipmentAndFacilitiesMember |
| Label | Role | Language |
| Wells and Related Equipment and Facilities [Member] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 932 235 50 13 | http://fasb.org/us-gaap/role/ref/legacyRef | 932 |