cm:Concept: us-gaap:MortalityMorbidityAndSurrenderRateAssumption
| Mortality, Morbidity and Surrender Rate Assumption |
| us-gaap:MortalityMorbidityAndSurrenderRateAssumption |
| Relevant mortality and surrender rate assumptions that are an integral part of the methodology used in calculating the reserve for future benefits to be paid to or on behalf of policyholders and related expenses less the present value of future net premiums using assumptions such as estimates of expected investment yields, mortality, morbidity, terminations and expenses, applicable at the time the insurance contracts are made and cost of settling insured claims and cost incurred in the claim settlement process. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:MortalityMorbidityAndSurrenderRateAssumption |