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cm:Level3TextBlock: us-gaap:SecuritiesOwnedAndOtherInvestmentsNotReadilyMarketableDisclosureTextBlock
Standard label: Securities Owned and Other Investments Not Readily Marketable Disclosure [Table Text Block]
Name: us-gaap:SecuritiesOwnedAndOtherInvestmentsNotReadilyMarketableDisclosureTextBlock
Documentation: Tabular disclosure of quantitative and qualitative information related to securities and other investments not readily marketable, including, but not limited to, thinly traded securities or investments, restricted securities and securities in nonpublic entities.
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:SecuritiesOwnedAndOtherInvestmentsNotReadilyMarketableDisclosureTextBlock

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Labels
Label Role Language
Securities Owned and Other Investments Not Readily Marketable Disclosure [Table Text Block] http://www.xbrl.org/2003/role/label en-US

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References
Reference Role Topic
FASB Accounting Standards Codification 940 820 50 1 http://fasb.org/us-gaap/role/ref/legacyRef 940