| Standard label: | SEC Schedule, 12-17, Insurance Companies, Reinsurance, Premium, Percentage Assumed to Net |
| Name: | us-gaap:PremiumsPercentageAssumedToNet |
| Documentation: | Percentage of assumed premium earned to premium earned after effects of reinsurance, as disclosed in supplementary reinsurance information. |
| Object type: | cm:Concept |
| Data type: | Percent (num:percentItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:PremiumsPercentageAssumedToNet |
| Label | Role | Language |
| SEC Schedule, 12-17, Insurance Companies, Reinsurance, Premium, Percentage Assumed to Net | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 944 235 S99 2 (SX 210.12-17(Column F)) | http://www.xbrl.org/2003/role/disclosureRef | 944 |