cm:Level3TextBlock: us-gaap:PurchaseCommitmentExcludingLongtermCommitmentTableTextBlock
| Purchase Commitment, Excluding Long-term Commitment [Table Text Block] |
| us-gaap:PurchaseCommitmentExcludingLongtermCommitmentTableTextBlock |
| Tabular disclosure of arrangements in which the entity has agreed to procure goods or services from one or more suppliers. May include identification of the goods or services to be purchased, identity of the seller, pricing, effects on pricing for failing to reach minimum quantities required to be purchased (such as penalties), cancellation rights, and termination provisions. |
| cm:Level3TextBlock |
| Text Block (HTML) (nonnum:textBlockItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:PurchaseCommitmentExcludingLongtermCommitmentTableTextBlock |
| PurchaseCommitmentExcludingLongTermCommitment |