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cm:Concept: us-gaap:DefinedBenefitPlanNetPeriodicBenefitCostCreditCurtailmentGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleList
Standard label: Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Curtailment Gain (Loss), Statement of Income or Comprehensive Income [Extensible List]
Name: us-gaap:DefinedBenefitPlanNetPeriodicBenefitCostCreditCurtailmentGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleList
Documentation: Indicates line item in statement of income or comprehensive income that includes curtailment gain (loss) component of net periodic benefit (cost) credit for defined benefit plan.
Object type: cm:Concept
Data type: srt-types:extensibleListItemType
Period type: For Period (duration)
Balance type: (no balance type)
Abstract: false
Workiva Wdesk Taxonomy Analyzer: us-gaap:DefinedBenefitPlanNetPeriodicBenefitCostCreditCurtailmentGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleList

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Labels
Label Role Language
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Curtailment Gain (Loss), Statement of Income or Comprehensive Income [Extensible List] 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 (h) http://www.xbrl.org/2003/role/disclosureRef 715
FASB Accounting Standards Codification 715 20 50 6 (a) http://www.xbrl.org/2003/role/disclosureRef 715