cm:Concept: us-gaap:BusinessCombinationProFormaInformationIncompleteInitialAccounting
| Business Combination, Pro Forma Information, Incomplete Initial Accounting |
| us-gaap:BusinessCombinationProFormaInformationIncompleteInitialAccounting |
| This element represents a description of which of the acquiree revenue and earnings, since the date of acquisition which have been included in the income statement of the period, or any of the required pro forma disclosure information disclosures could not be made and the reason why they could not be made, if the acquisition date of a business combination is after the reporting date but before the financial statements are issued. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:BusinessCombinationProFormaInformationIncompleteInitialAccounting |