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cm:Concept: us-gaap:DefinedBenefitPlanBenefitObligationPeriodIncreaseDecrease
Standard label: Defined Benefit Plan, Benefit Obligation, Period Increase (Decrease)
Name: us-gaap:DefinedBenefitPlanBenefitObligationPeriodIncreaseDecrease
Documentation: Amount of increase (decrease) in benefit obligation of defined benefit plan.
Object type: cm:Concept
Data type: Monetary (xbrli:monetaryItemType)
Period type: For Period (duration)
Balance type: (no balance type)
Abstract: false
Workiva Wdesk Taxonomy Analyzer: us-gaap:DefinedBenefitPlanBenefitObligationPeriodIncreaseDecrease

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Labels
Label Role Language
Defined Benefit Plan, Benefit Obligation, Period Increase (Decrease) http://www.xbrl.org/2003/role/label en-US
Defined Benefit Plan, Benefit Obligation, Period Increase (Decrease), Total http://www.xbrl.org/2003/role/totalLabel en-US

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References
Reference Role Topic