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cm:Concept: us-gaap:DisposalGroupIncludingDiscontinuedOperationPostretirementPlanBenefitObligation
Standard label: Disposal Group, Including Discontinued Operation, Postretirement Plan Benefit Obligation
Name: us-gaap:DisposalGroupIncludingDiscontinuedOperationPostretirementPlanBenefitObligation
Documentation: Amount classified as defined benefit non-pension postretirement plan obligations attributable to disposal group held for sale or disposed of.
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:DisposalGroupIncludingDiscontinuedOperationPostretirementPlanBenefitObligation

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Labels
Label Role Language
Disposal Group, Including Discontinued Operation, Postretirement Plan Benefit Obligation http://www.xbrl.org/2003/role/label en-US

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References
Reference Role Topic
FASB Accounting Standards Codification 205 20 50 5B (e) http://fasb.org/us-gaap/role/ref/legacyRef 205
FASB Accounting Standards Codification 205 20 45 11 http://fasb.org/us-gaap/role/ref/legacyRef 205
FASB Accounting Standards Codification 360 10 50 3 (e) http://fasb.org/us-gaap/role/ref/legacyRef 360