cm:Concept: us-gaap:LiabilityForFuturePolicyBenefitsMethodologyAndAssumptions
| Liability for Future Policy Benefits, Methodology and Assumptions |
| us-gaap:LiabilityForFuturePolicyBenefitsMethodologyAndAssumptions |
| Methodology and assumptions for accrued obligation to policyholders that relates to insured events, and can be viewed as either (a) the present value of future benefits to be paid to or on behalf of policyholders and expenses less the present value of future net premiums payable under the insurance contracts or (b) the accumulated amount of net premiums already collected less the accumulated amount of benefits and expenses already paid to or on behalf of policyholders. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:LiabilityForFuturePolicyBenefitsMethodologyAndAssumptions |