cm:Concept: us-gaap:AssetsHeldInTrustCurrent
| Assets Held-in-trust, Current |
| us-gaap:AssetsHeldInTrustCurrent |
| The amount of cash, securities, or other assets held by a third-party trustee pursuant to the terms of an agreement which assets are available to be used by beneficiaries to that agreement only within the specific terms thereof and which agreement is expected to terminate within one year of the balance sheet date (or operating cycle, if longer) at which time the assets held-in-trust will be released or forfeited. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| As Of (instant) |
| Debit |
| false |
| us-gaap:AssetsHeldInTrustCurrent |