| Standard label: | Natural Gas, Midstream [Member] |
| Name: | us-gaap:NaturalGasMidstreamMember |
| Documentation: | Process related to midstream activity for flammable gas occurring naturally underground. Activity includes, but is not limited to, gathering from well, processing to remove impurity, storage, transmission, and sale of natural gas and related products. |
| 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:NaturalGasMidstreamMember |
| Label | Role | Language |
| Natural Gas, Midstream [Member] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 606 10 55 91 (a) | http://www.xbrl.org/2009/role/commonPracticeRef | 606 |