cm:Level3TextBlock: us-gaap:ScheduleOfQuantitativeInformationAboutFinancialAssetsAndAssociatedLiabilitiesAccountedForAsSecuredBorrowingsTextBlock
Schedule of Assets and Associated Liabilities Accounted for as Secured Borrowings [Table Text Block] |
us-gaap:ScheduleOfQuantitativeInformationAboutFinancialAssetsAndAssociatedLiabilitiesAccountedForAsSecuredBorrowingsTextBlock |
Tabular disclosure of the carrying amount and classification of assets and liabilities recognized in the transferor's statement of financial position at the end of each period presented. |
cm:Level3TextBlock |
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For Period (duration) |
(no balance type) |
false |
us-gaap:ScheduleOfQuantitativeInformationAboutFinancialAssetsAndAssociatedLiabilitiesAccountedForAsSecuredBorrowingsTextBlock |