cm:Concept: us-gaap:FinancialServicesLiabilities
| Financial Services Liabilities |
| us-gaap:FinancialServicesLiabilities |
| For entities that provide full or partial financing and servicing for customers supplementary to its major operations (such as a manufacturer or a homebuilder providing and servicing loans to buyers), represents the liabilities associated with such activities, including accounts payable and accrued liabilities. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| As Of (instant) |
| Credit |
| false |
| us-gaap:FinancialServicesLiabilities |