cm:Concept: us-gaap:DeferredSubscriberAcquisitionCostsCurrent
| Deferred Subscriber Acquisition Costs, Current |
| us-gaap:DeferredSubscriberAcquisitionCostsCurrent |
| Costs deferred when a service provider provides incentives to third-party manufacturers or resellers to reduce the selling prices of specialized equipment in order to stimulate end-customer demand for the service provider's offerings. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| As Of (instant) |
| Debit |
| false |
| us-gaap:DeferredSubscriberAcquisitionCostsCurrent |