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cm:Concept: us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsAfterTax
Standard label: Accumulated Other Comprehensive Income (Loss), Defined Benefit Plan, Transition Asset (Obligation), after Tax
Name: us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsAfterTax
Documentation: Amount, after tax, of accumulated other comprehensive income (loss) for transition asset (obligation) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.
Object type: cm:Concept
Data type: Monetary (xbrli:monetaryItemType)
Period type: As Of (instant)
Balance type: Credit
Abstract: false
Workiva Wdesk Taxonomy Analyzer: us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsAfterTax

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Labels
Label Role Language
Accumulated Other Comprehensive Income (Loss), Defined Benefit Plan, Transition Asset (Obligation), after Tax http://www.xbrl.org/2003/role/label en-US

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References
Reference Role Topic
FASB Accounting Standards Codification 220 10 45 14A http://fasb.org/us-gaap/role/ref/legacyRef 220
FASB Accounting Standards Codification 715 20 50 1 (j) http://fasb.org/us-gaap/role/ref/legacyRef 715

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Roll Up Relations
Part Of Roll Up:
us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax