| Standard label: | Cost-method Investments, Realized Gain (Loss) |
| Name: | us-gaap:CostMethodInvestmentsRealizedGainLoss |
| Documentation: | This item represents the gain (loss) realized during the period from the sale of investments accounted for under the cost method of accounting and any losses recognized thereon for impairments of other than a temporary nature. |
| 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:CostMethodInvestmentsRealizedGainLoss |
| Label | Role | Language |
| Cost-method Investments, Realized Gain (Loss) | http://www.xbrl.org/2003/role/label | en-US |
| Cost-method Investments, Realized Gain (Loss), Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |