| Standard label: | Exchange of Productive Assets [Member] |
| Name: | us-gaap:ExchangeOfProductiveAssetsMember |
| Documentation: | The exchange of assets employed in production for similar productive assets or an equivalent interest in similar productive assets. The trade of player contracts by professional sports organizations is an example. |
| 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:ExchangeOfProductiveAssetsMember |
| Label | Role | Language |
| Exchange of Productive Assets [Member] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 845 10 05 6 (c) | http://fasb.org/us-gaap/role/ref/legacyRef | 845 |