| Standard label: | Deferred Policy Acquisition Cost, Amortization Expense, Net Investment Gains (Losses) |
| Name: | us-gaap:DeferredPolicyAcquisitionCostAmortizationExpenseNetInvestmentGainsLosses |
| Documentation: | Amount of amortization expense (reversal of amortization expense) of deferred policy acquisition costs from realized net investment gain (loss). |
| 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:DeferredPolicyAcquisitionCostAmortizationExpenseNetInvestmentGainsLosses |
| Label | Role | Language |
| Deferred Policy Acquisition Cost, Amortization Expense, Net Investment Gains (Losses) | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 944 30 50 1 (c) | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |
| FASB Accounting Standards Codification 944 30 35 8 | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |