cm:Concept: us-gaap:InventoryRawMaterialsAndPurchasedPartsNetOfReserves
| Inventory, Raw Materials and Purchased Parts, Net of Reserves |
| us-gaap:InventoryRawMaterialsAndPurchasedPartsNetOfReserves |
| Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of items purchased for use as components of a finished product or pieces of machinery and equipment plus any items in their natural and unrefined state. This element may be used when the reporting entity combines raw materials and purchased parts into an aggregate amount. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| As Of (instant) |
| Debit |
| false |
| us-gaap:InventoryRawMaterialsAndPurchasedPartsNetOfReserves |