cm:Level2TextBlock: us-gaap:InventoryCostsForContractsOrProgramsPolicy
| Inventory Costs for Contracts or Programs, Policy [Policy Text Block] |
| us-gaap:InventoryCostsForContractsOrProgramsPolicy |
| Disclosure of accounting policy for the basis and manner that goods are added and removed from inventory for costs relating to long-term contracts or programs. 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). Elements of costs in inventory may include retained costs representing the excess of manufacturing or production costs over the amounts charged to cost of sales or delivered or in-process units, initial tooling or other deferred startup costs. |
| cm:Level2TextBlock |
| Text Block (HTML) (nonnum:textBlockItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:InventoryCostsForContractsOrProgramsPolicy |