| Standard label: | Short-duration Insurance Contracts, Discounted Liabilities, Interest Accretion |
| Name: | us-gaap:ShortdurationInsuranceContractsDiscountedLiabilitiesInterestAccretion |
| Documentation: | Amount of interest accretion recognized for short-duration insurance contract liabilities that are reported at present value. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:ShortdurationInsuranceContractsDiscountedLiabilitiesInterestAccretion |
| Label | Role | Language |
| Short-duration Insurance Contracts, Discounted Liabilities, Interest Accretion | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 944 40 50 5 (d) | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |
| FASB Accounting Standards Codification 944 40 50 5 (e) | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |