| Standard label: | Increase (Decrease) in Other Policyholder Funds |
| Name: | us-gaap:IncreaseDecreaseInOtherPolicyholderFunds |
| Documentation: | The change in other policyholder funds recorded on the balance sheet, which is needed to adjust net income to arrive at net cash flows provided by or used in operations. |
| 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:IncreaseDecreaseInOtherPolicyholderFunds |
| Label | Role | Language |
| Increase (Decrease) in Other Policyholder Funds | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 230 10 45 28 (a) | http://fasb.org/us-gaap/role/ref/legacyRef | 230 |
| Part Of Roll Up: |
| us-gaap:IncreaseDecreaseInInsuranceLiabilities |