| Standard label: | Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense, Premium, Description |
| Name: | us-gaap:CausesOfIncreaseDecreaseInLiabilityForUnpaidClaimsAndClaimsAdjustmentExpensePremiumDescription |
| Documentation: | Description of whether additional premiums or return premiums have been accrued as a result of the change in incurred claims and claim adjustment expenses. |
| Object type: | cm:Concept |
| Data type: | Text/String (xbrli:stringItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:CausesOfIncreaseDecreaseInLiabilityForUnpaidClaimsAndClaimsAdjustmentExpensePremiumDescription |
| Label | Role | Language |
| Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense, Premium, Description | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 944 40 50 3 | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |