| SourceName | Taxonomy Technical Improvement | http://fasb.org/srt/role/changeNote/changeNote |
| TaxonomyVersion | 2019 | http://fasb.org/srt/role/changeNote/changeNote |
| ChangeDate | 2018-10 | http://fasb.org/srt/role/changeNote/changeNote |
| ModifiedLabels | true | http://fasb.org/srt/role/changeNote/changeNote |
| ModifiedDocumentation | true | http://fasb.org/srt/role/changeNote/changeNote |
| PreviousDocumentation | These elements contain detailed elements that describe present activities, such as the number of wells in process of drilling (including wells temporarily suspended), water floods in process of installation, pressure maintenance operations, and any other related operations of material importance by appropriate geographic areas. | http://fasb.org/srt/role/changeNote/changeNote |