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cm:Concept: us-gaap:CoalIndustryRetireeHealthBenefitActOf1992MethodOfAccountingAdopted
Standard label: Coal Industry Retiree Health Benefit Act of 1992, Method of Accounting Adopted
Name: us-gaap:CoalIndustryRetireeHealthBenefitActOf1992MethodOfAccountingAdopted
Documentation: Description of method of accounting adopted for obligation to provide medical and death benefits under Coal Industry Retiree Health Benefit Act of 1992.
Object type: cm:Concept
Data type: Text/String (xbrli:stringItemType)
Period type: For Period (duration)
Balance type: (no balance type)
Abstract: false
Workiva Wdesk Taxonomy Analyzer: us-gaap:CoalIndustryRetireeHealthBenefitActOf1992MethodOfAccountingAdopted

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Labels
Label Role Language
Coal Industry Retiree Health Benefit Act of 1992, Method of Accounting Adopted http://www.xbrl.org/2003/role/label en-US

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References
Reference Role Topic
FASB Accounting Standards Codification 930 715 50 1 http://fasb.org/us-gaap/role/ref/legacyRef 930