| Standard label: | Statutory Accounting Practices, Statutory Capital and Surplus, Balance |
| Name: | us-gaap:StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance |
| Documentation: | The amount of statutory capital and surplus (stockholders' equity) as of the balance sheet date using prescribed or permitted statutory accounting practices (rather than GAAP, if different) of the state or country. |
| 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:StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance |
| Label | Role | Language |
| Statutory Accounting Practices, Statutory Capital and Surplus, Balance | http://www.xbrl.org/2003/role/label | en-US |
| Statutory Accounting Practices, Statutory Capital and Surplus, Balance, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 944 210 S99 1 (SX 210.7-03(a)(23)(c)) | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |
| FASB Accounting Standards Codification 944 505 50 1 (a) | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |