cm:Concept: us-gaap:CostMethodInvestmentsStatementThatFairValueWasNotEstimated
| Cost Method Investments, Statement that Fair Value was Not Estimated |
| us-gaap:CostMethodInvestmentsStatementThatFairValueWasNotEstimated |
| This item represents the required disclosure of the fact that the fair value of a cost-method investment is not estimated because there have been no identified events or changes in circumstances that may have a significant adverse effect on the fair value of the investment, and (1) that it is not practicable to estimate the fair value of the investment, or (2) that the investor is exempt from estimating fair value because it is a nonpublic entity (as defined). |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:CostMethodInvestmentsStatementThatFairValueWasNotEstimated |