cm:Concept: us-gaap:LongTermDebtMaturitiesRepaymentTerms
| Long-term Debt, Maturities, Repayment Terms |
| us-gaap:LongTermDebtMaturitiesRepaymentTerms |
| Disclosure of timing of required repayments, sinking fund requirements, and other redeemable securities at fixed or determinable prices and dates in the five years immediately following the date of the latest balance sheet presented in the financial statements, and the amount thereafter to fully repay the principal of long-term debt. These disclosures may be made either on an individual debt or security basis, by type of debt or security basis, or on a combined basis. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:LongTermDebtMaturitiesRepaymentTerms |