cm:Concept: us-gaap:ShortDurationContractsDescription
| Short-Duration Contracts, Description |
| us-gaap:ShortDurationContractsDescription |
| Description of insurance products considered to be short-duration contracts because the contract provides insurance protection for a fixed period of short duration and enables the insurer to cancel the contract or to adjust the provisions of the contract at the end of any contract period, such as adjusting the amount of premiums charged or coverage provided. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:ShortDurationContractsDescription |