cm:Table: us-gaap:ScheduleOfIntercompanyForeignCurrencyBalanceTable
| Schedule of Intercompany Foreign Currency Balance [Table] |
| us-gaap:ScheduleOfIntercompanyForeignCurrencyBalanceTable |
| Schedule of long-term intercompany foreign balances, including related intercompany entity, underlying foreign currencies and amounts of intercompany foreign currency transactions that are of a long-term investment nature (that is settlement is not planned or anticipated in the foreseeable future), as of the balance sheet date. |
| cm:Table |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| true |
| us-gaap:ScheduleOfIntercompanyForeignCurrencyBalanceTable |