cm:Concept: us-gaap:RedeemableNoncontrollingInterestEquityFairValue
| Redeemable Noncontrolling Interest, Equity, Fair Value |
| us-gaap:RedeemableNoncontrollingInterestEquityFairValue |
| The aggregate fair value as of the reporting date of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| As Of (instant) |
| Credit |
| false |
| us-gaap:RedeemableNoncontrollingInterestEquityFairValue |