cm:Concept: us-gaap:StatutoryCapitalAndSurplusApplyingNationalAssociationOfInsuranceCommissionersNAICPractices
| Statutory Capital and Surplus Applying National Association of Insurance Commissioners (NAIC) Practices |
| us-gaap:StatutoryCapitalAndSurplusApplyingNationalAssociationOfInsuranceCommissionersNAICPractices |
| Amount of statutory capital and surplus computed using statutory accounting practices prescribed by the National Association of Insurance Commissioners. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| As Of (instant) |
| Credit |
| false |
| us-gaap:StatutoryCapitalAndSurplusApplyingNationalAssociationOfInsuranceCommissionersNAICPractices |