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cm:Member: us-gaap:FairValueConcentrationOfRiskMarketRiskManagementEffectsOnIncomeOrNetAssetsMember
Standard label: Fair Value, Concentration of Risk, Market Risk Management, Effects on Income or Net Assets [Member]
Name: us-gaap:FairValueConcentrationOfRiskMarketRiskManagementEffectsOnIncomeOrNetAssetsMember
Documentation: This item represents the encouraged disclosure providing information about the hypothetical effects on other comprehensive income (a separate component of shareholders' equity), net assets, or annual income which several possible changes in market prices of the associated financial instrument (as defined) may have, in a manner that is consistent with the way the Company manages or adjusts for those risks.
Object type: cm:Member
Data type: [Member] (nonnum:domainItemType)
Period type: For Period (duration)
Balance type: (no balance type)
Abstract: true
Workiva Wdesk Taxonomy Analyzer: us-gaap:FairValueConcentrationOfRiskMarketRiskManagementEffectsOnIncomeOrNetAssetsMember

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Labels
Label Role Language
Fair Value, Concentration of Risk, Market Risk Management, Effects on Income or Net Assets [Member] http://www.xbrl.org/2003/role/label en-US

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References
Reference Role Topic
FASB Accounting Standards Codification 825 10 50 23 (b) http://fasb.org/us-gaap/role/ref/legacyRef 825