| Standard label: | Closed Block Presentation Basis |
| Name: | us-gaap:ClosedBlockPresentationBasis |
| Documentation: | Description of the methodology, assumptions, purpose, types of insurance policies included and nature of cash flows that increase and decrease assets and liabilities, including an indication of the continuing responsibility of the insurance entity to support the payment of contractual benefits and the nature of expenses charged to the operations for the segregated group of participating or dividend-paying policies and contracts along with the assets allocated to them (known as a closed block) established as a way to protect the interests of preexisting policyholders from the competing interests of the stockholders. |
| Object type: | cm:Concept |
| Data type: | Text/String (xbrli:stringItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:ClosedBlockPresentationBasis |
| Label | Role | Language |
| Closed Block Presentation Basis | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 944 805 50 2 (b) | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |
| FASB Accounting Standards Codification 944 805 50 2 (c)(2) | http://www.xbrl.org/2003/role/disclosureRef | 944 |