Details for Selection

Standard label: Increase (Decrease) in Pneumoconiosis Benefit Obligations Noncurrent
Name: us-gaap:IncreaseDecreaseInPneumoconiosisBenefitObligationsNoncurrent
Documentation: The increase (decrease) during the reporting period in the amount due to fund payment obligations to former employees suffering from pneumoconiosis.
Commentary:
Data type: Monetary (xbrli:monetaryItemType)
Period type: For period (duration)
Balance type: Debit
Object class: [Concept]