cm:Concept: us-gaap:ProductLiabilityContingencyFactorsChangingEstimate
| Product Liability Contingency, Factors Changing Estimate |
| us-gaap:ProductLiabilityContingencyFactorsChangingEstimate |
| Factors that may cause a change in an estimate of a loss that exceeds: the amount accrued for the contingency, a recognized asset for third-party recoveries, an estimated loss contingency that has not been accrued, or a disclosed gain contingency. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:ProductLiabilityContingencyFactorsChangingEstimate |