cm:Concept: us-gaap:ForwardContractIndexedToIssuersEquityContractReclassification
| Forward Contract Indexed to Issuer's Equity, Contract Reclassification |
| us-gaap:ForwardContractIndexedToIssuersEquityContractReclassification |
| Disclose forward contract reclassifications (in whole or in part) into (or out of) permanent and/or temporary equity during the life of the freestanding contract, the reason for the reclassification, and the impact on the issuer's financial statements. If partially reclassified, disclose the Company's accounting policy for partial reclassifications. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:ForwardContractIndexedToIssuersEquityContractReclassification |