cm:Concept: us-gaap:CustomersLiabilityForAcceptancesNet
| Customer's Liability for Acceptances, Net |
| us-gaap:CustomersLiabilityForAcceptancesNet |
| The aggregate of all customer's outstanding debt to the institution that resulted from short-term negotiable time drafts drawn on and accepted by an institution (also known as banker's acceptance transactions), net of allowance for uncollectible customer's liability for acceptances. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| As Of (instant) |
| Debit |
| false |
| us-gaap:CustomersLiabilityForAcceptancesNet |