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cm:Level3TextBlock: us-gaap:ScheduleOfSecuritiesFinancingTransactionsTextBlock
Standard label: Schedule of Securities Financing Transactions [Table Text Block]
Name: us-gaap:ScheduleOfSecuritiesFinancingTransactionsTextBlock
Documentation: Tabular disclosure of securities financing transactions including resale and repurchase agreements, securities borrowed and lending transactions, securities received as collateral and obligations to return securities received as collateral.
Object type: cm:Level3TextBlock
Data type: Text Block (HTML) (nonnum:textBlockItemType)
Period type: For Period (duration)
Balance type: (no balance type)
Abstract: false
Workiva Wdesk Taxonomy Analyzer: us-gaap:ScheduleOfSecuritiesFinancingTransactionsTextBlock

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Labels
Label Role Language
Schedule of Securities Financing Transactions [Table Text Block] http://www.xbrl.org/2003/role/label en-US

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References
Reference Role Topic
FASB Accounting Standards Codification 210 20 50 4 http://www.xbrl.org/2003/role/disclosureRef 210
FASB Accounting Standards Codification 235 10 S99 1 (SX 210.4-08.(m)) http://fasb.org/us-gaap/role/ref/legacyRef 235
FASB Accounting Standards Codification 860 30 50 1A http://fasb.org/us-gaap/role/ref/legacyRef 860