cm:Level3TextBlock: us-gaap:TransferOfCertainFinancialAssetsAccountedForAsSecuredBorrowingsTableTextBlock
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table Text Block] |
us-gaap:TransferOfCertainFinancialAssetsAccountedForAsSecuredBorrowingsTableTextBlock |
Tabular disclosure of the nature and risks of short-term collateralized financing obtained through repurchase agreements, securities lending transactions and repurchase-to-maturity transactions, accounted for as secured borrowings. |
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us-gaap:TransferOfCertainFinancialAssetsAccountedForAsSecuredBorrowingsTableTextBlock |