cm:Level2TextBlock: us-gaap:InventorySuppliesPolicy
| Inventory Supplies, Policy [Policy Text Block] |
| us-gaap:InventorySuppliesPolicy |
| Disclosure of accounting policy for the basis and manner that goods are added and removed from inventory for supplies to be consumed directly or indirectly in production. If inventory is carried at cost, this disclosure includes the nature of the cost elements included in inventory and how cost is determined (such as FIFO, LIFO, average). |
| cm:Level2TextBlock |
| Text Block (HTML) (nonnum:textBlockItemType) |
| For Period (duration) |
| (no balance type) |
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| us-gaap:InventorySuppliesPolicy |