cm:Table: us-gaap:ObligationWithJointAndSeveralLiabilityArrangementTable
| Obligation with Joint and Several Liability Arrangement [Table] |
| us-gaap:ObligationWithJointAndSeveralLiabilityArrangementTable |
| Disclosure of information about contractual obligation with joint and several liability, including but not limited to, debt arrangements, settled litigation, and judicial rulings. |
| cm:Table |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| true |
| us-gaap:ObligationWithJointAndSeveralLiabilityArrangementTable |