cm:Concept: us-gaap:TemporaryEquityParOrStatedValuePerShare
| Temporary Equity, Par or Stated Value Per Share |
| us-gaap:TemporaryEquityParOrStatedValuePerShare |
| Per share amount of par value or stated value of stock classified as temporary equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. |
| cm:Concept |
| Share (num:perShareItemType) |
| As Of (instant) |
| (no balance type) |
| false |
| us-gaap:TemporaryEquityParOrStatedValuePerShare |