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cm:Concept: us-gaap:PledgedAssetsSeparatelyReportedLoansPledgedAsCollateralAtFairValue
Standard label: Pledged Assets Separately Reported, Loans Pledged as Collateral, at Fair Value
Name: us-gaap:PledgedAssetsSeparatelyReportedLoansPledgedAsCollateralAtFairValue
Documentation: The fair value, as of the date of each statement of financial position presented, of loans which are owned but transferred to serve as collateral for the payment of the related debt obligation primarily arising from secured borrowings and repurchase agreements, and that are reclassified and separately reported in the statement of financial position because the transferee has the right by contract or custom to sell or re-pledge them.
Object type: cm:Concept
Data type: Monetary (xbrli:monetaryItemType)
Period type: As Of (instant)
Balance type: Debit
Abstract: false
Workiva Wdesk Taxonomy Analyzer: us-gaap:PledgedAssetsSeparatelyReportedLoansPledgedAsCollateralAtFairValue

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Labels
Label Role Language
Pledged Assets Separately Reported, Loans Pledged as Collateral, at Fair Value http://www.xbrl.org/2003/role/label en-US
Pledged Assets Separately Reported, Loans Pledged as Collateral, at Fair Value, Total http://www.xbrl.org/2003/role/totalLabel en-US

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References
Reference Role Topic
FASB Accounting Standards Codification 860 30 45 1 http://fasb.org/us-gaap/role/ref/legacyRef 860