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cm:Level3TextBlock: us-gaap:DefinedBenefitPlanPlanAssetsAllocationTableTextBlock
Standard label: Defined Benefit Plan, Plan Assets, Allocation [Table Text Block]
Name: us-gaap:DefinedBenefitPlanPlanAssetsAllocationTableTextBlock
Documentation: Tabular disclosure of investment allocation of defined benefit plan assets. Includes, but is not limited to, investment allocation percentage or range of percentages.
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:DefinedBenefitPlanPlanAssetsAllocationTableTextBlock

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Labels
Label Role Language
Defined Benefit Plan, Plan Assets, Allocation [Table Text Block] http://www.xbrl.org/2003/role/label en-US

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References
Reference Role Topic
FASB Accounting Standards Codification 715 20 50 1 (d)(i) http://www.xbrl.org/2009/role/commonPracticeRef 715