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cm:Member: us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember
Standard label: Other Postretirement Benefits Plan [Member]
Name: us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember
Documentation: Plan designed to provide other postretirement benefits. Includes, but is not limited to, defined benefit and defined contribution plans. Excludes pension benefits.
Object type: cm:Member
Data type: [Member] (nonnum:domainItemType)
Period type: For Period (duration)
Balance type: (no balance type)
Abstract: true
Workiva Wdesk Taxonomy Analyzer: us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember

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Labels
Label Role Language
Other Postretirement Benefits Plan [Member] http://www.xbrl.org/2003/role/label en-US

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References
Reference Role Topic
FASB Accounting Standards Codification 712 10 15 4 (d) http://fasb.org/us-gaap/role/ref/legacyRef 712
FASB Accounting Standards Codification 715 20 50 1 http://fasb.org/us-gaap/role/ref/legacyRef 715
FASB Accounting Standards Codification 715 20 50 2 http://fasb.org/us-gaap/role/ref/legacyRef 715
FASB Accounting Standards Codification 715 70 50 1 http://fasb.org/us-gaap/role/ref/legacyRef 715