| Standard label: | Gain (Loss) Related to Litigation Settlement |
| Name: | us-gaap:GainLossRelatedToLitigationSettlement |
| Documentation: | Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process. |
| 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:GainLossRelatedToLitigationSettlement |
| Label | Role | Language |
| Gain (Loss) Related to Litigation Settlement | http://www.xbrl.org/2003/role/label | en-US |
| Gain (Loss) Related to Litigation Settlement, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 450 20 50 1 | http://fasb.org/us-gaap/role/ref/legacyRef | 450 |
| Part Of Roll Up: |
| us-gaap:OperatingCostsAndExpenses |