| Standard label: | Restricted Cash and Investments |
| Name: | us-gaap:RestrictedCashAndInvestments |
| Documentation: | Cash and investments whose use in whole or in part is restricted for the long-term, generally by contractual agreements or regulatory requirements. For use in an unclassified balance sheet. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:RestrictedCashAndInvestments |
| Label | Role | Language |
| Restricted Cash and Investments | http://www.xbrl.org/2003/role/label | en-US |
| Restricted Cash and Investments, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |