| Standard label: | Surplus Notes |
| Name: | us-gaap:SurplusNotes |
| Documentation: | Financial instruments issued by insurance entities (surplus notes) that are includable in surplus for statutory accounting purposes as prescribed or permitted by state laws and regulations that are liabilities of the issuer. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:SurplusNotes |
| Label | Role | Language |
| Surplus Notes | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 944 470 45 1 | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |