cm:Member: us-gaap:ProductFinancingArrangementMember
| Product Financing Arrangement [Member] |
| us-gaap:ProductFinancingArrangementMember |
| Arrangement that in form is a sale with full right of return but in substance is a financing in that the financier is not the end customer, is not at risk other than credit risk similar to any other form of lending arrangement, and typically is repaid from collections of sales made to actual customers including an amount that constitutes interest. |
| cm:Member |
| [Member] (nonnum:domainItemType) |
| For Period (duration) |
| (no balance type) |
| true |
| us-gaap:ProductFinancingArrangementMember |