| Standard label: | Policyholders' Surplus |
| Name: | us-gaap:PolicyholdersSurplus |
| Documentation: | Amount of policyholders' surplus excluded from calculating deferred taxes. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:PolicyholdersSurplus |
| Label | Role | Language |
| Policyholders' Surplus | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 740 10 25 3 (a)(4) | http://fasb.org/us-gaap/role/ref/legacyRef | 740 |
| FASB Accounting Standards Codification 740 30 50 2 | http://fasb.org/us-gaap/role/ref/legacyRef | 740 |
| FASB Accounting Standards Codification 740 30 50 2 (b)(c) | http://fasb.org/us-gaap/role/ref/legacyRef | 740 |
| FASB Accounting Standards Codification 942 740 50 1 (b) | http://fasb.org/us-gaap/role/ref/legacyRef | 942 |