| Standard label: | Loss Contingency Accrual, Insurance-related Assessment, Policy Surcharge Asset |
| Name: | us-gaap:LossContingencyAccrualInsuranceRelatedAssessmentPolicySurchargeAsset |
| Documentation: | The amount of insurance-related assessment liability that is expected to be recovered through policy surcharges applied to in-force policies. |
| 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:LossContingencyAccrualInsuranceRelatedAssessmentPolicySurchargeAsset |
| Label | Role | Language |
| Loss Contingency Accrual, Insurance-related Assessment, Policy Surcharge Asset | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 405 30 50 1 | http://fasb.org/us-gaap/role/ref/legacyRef | 405 |