| Standard label: | Loss Contingency, Pending Claims, Number |
| Name: | us-gaap:LossContingencyPendingClaimsNumber |
| Documentation: | Number of pending claims pertaining to a loss contingency. |
| Object type: | cm:Concept |
| Data type: | Integer (xbrli:integerItemType) |
| Period type: | As Of (instant) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:LossContingencyPendingClaimsNumber |
| Label | Role | Language |
| Loss Contingency, Pending Claims, Number | http://www.xbrl.org/2003/role/label | en-US |
| Loss Contingency, Pending Claims, Number, Ending Balance | http://www.xbrl.org/2003/role/periodEndLabel | en-US |
| Loss Contingency, Pending Claims, Number, Beginning Balance | http://www.xbrl.org/2003/role/periodStartLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 450 20 50 4 (a) | http://fasb.org/us-gaap/role/ref/legacyRef | 450 |