cm:Concept: us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable
| Increase (Decrease) in Income Taxes Payable |
| us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable |
| The increase (decrease) during the period in the amount due for taxes based on the reporting entity's earnings or attributable to the entity's income earning process (business presence) within a given jurisdiction. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| For Period (duration) |
| Debit |
| false |
| us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable |