| Standard label: | Trading Activity, Gain |
| Name: | us-gaap:TradingActivityGain |
| Documentation: | The net gain on trading activities (including both derivative and nonderivative instruments) recognized in the statement of financial performance. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:TradingActivityGain |
| Label | Role | Language |
| Trading Activity, Gain | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 815 10 50 4F (a) | http://fasb.org/us-gaap/role/ref/legacyRef | 815 |
| Part Of Roll Up: |
| us-gaap:TradingGainsLosses |