| Standard label: | Participating Insurance, Percentage of Premium Income |
| Name: | us-gaap:ParticipatingPolicyPercentageOfPremiumIncome |
| Documentation: | Percentage of participating insurance to premium income. |
| Object type: | cm:Concept |
| Data type: | Percent (num:percentItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:ParticipatingPolicyPercentageOfPremiumIncome |
| Label | Role | Language |
| Participating Insurance, Percentage of Premium Income | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 944 210 S99 1 (SX 210.7-03(a)(14)(b)(2)) | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |
| FASB Accounting Standards Codification 944 50 50 1 (a) | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |