| Standard label: | Closed Block Operations, Benefits and Expense |
| Name: | us-gaap:ClosedBlockOperationsBenefitsAndExpense |
| Documentation: | Amount of benefits, claims and expenses that are related to an insurance entity's segregated group of participating or dividend-paying policies and contracts along with the assets allocated to them (known as a closed block). Includes, but is not limited to, death benefits, matured endowments, participating dividends, general expenses and deferred acquisition costs related to the closed block. |
| 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:ClosedBlockOperationsBenefitsAndExpense |
| Label | Role | Language |
| Closed Block Operations, Benefits and Expense | http://www.xbrl.org/2003/role/label | en-US |
| Closed Block Operations, Benefits and Expense, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 944 805 50 3 (b) | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |