| Standard label: | Short-duration Insurance Contract, Discounted Liability, Discount for Reinsurance |
| Name: | us-gaap:ShortDurationInsuranceContractDiscountedLiabilityDiscountForReinsurance |
| Documentation: | Amount of cumulative discount for reinsurance related to time value of money deducted from short-duration insurance contract liability reported at present value. |
| 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:ShortDurationInsuranceContractDiscountedLiabilityDiscountForReinsurance |
| Label | Role | Language |
| Short-duration Insurance Contract, Discounted Liability, Discount for Reinsurance | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 944 40 50 5 (c) | http://www.xbrl.org/2009/role/commonPracticeRef | 944 |