cm:Level2TextBlock: us-gaap:RevenueRecognitionSalesOfGoods
| Revenue Recognition, Sales of Goods [Policy Text Block] |
| us-gaap:RevenueRecognitionSalesOfGoods |
| Disclosure of accounting policy for revenue recognition for the sale of goods, which is a transaction between an entity delivering a tangible good to a purchaser. The entity also may disclose its treatment of any unearned or deferred revenue that arises from the transaction. |
| cm:Level2TextBlock |
| Text Block (HTML) (nonnum:textBlockItemType) |
| For Period (duration) |
| (no balance type) |
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| us-gaap:RevenueRecognitionSalesOfGoods |