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cm:Concept: us-gaap:DefinedBenefitPlanExplanationOfSignificantChangeInBenefitObligationOrPlanAssetsNotApparentFromOtherRequiredDisclosures
Standard label: Defined Benefit Plan, Changes in Benefit Obligation and Plan Assets, Description
Name: us-gaap:DefinedBenefitPlanExplanationOfSignificantChangeInBenefitObligationOrPlanAssetsNotApparentFromOtherRequiredDisclosures
Documentation: Description of reason for changes in benefit obligation and plan assets of defined benefit plan.
Object type: cm:Concept
Data type: Text/String (xbrli:stringItemType)
Period type: For Period (duration)
Balance type: (no balance type)
Abstract: false
Workiva Wdesk Taxonomy Analyzer: us-gaap:DefinedBenefitPlanExplanationOfSignificantChangeInBenefitObligationOrPlanAssetsNotApparentFromOtherRequiredDisclosures

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Labels
Label Role Language
Defined Benefit Plan, Changes in Benefit Obligation and Plan Assets, Description 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 (r) http://fasb.org/us-gaap/role/ref/legacyRef 715
FASB Accounting Standards Codification 715 60 50 3 (c) http://fasb.org/us-gaap/role/ref/legacyRef 715