| Standard label: | Separate Account, Liability, Increase (Decrease) from Invested Performance |
| Name: | us-gaap:SeparateAccountLiabilityIncreaseDecreaseFromInvestedPerformance |
| Documentation: | Amount of increase (decrease) in separate account liability from performance of investment. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:SeparateAccountLiabilityIncreaseDecreaseFromInvestedPerformance |
| Label | Role | Language |
| Separate Account, Liability, Increase (Decrease) from Invested Performance | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 944 80 50 2 (a) | http://www.xbrl.org/2009/role/commonPracticeRef | 944 |
| FASB Accounting Standards Codification 944 80 55 18 | http://www.xbrl.org/2003/role/exampleRef | 944 |