Search Elements:
- Taxonomy
- us-gaap
- Name
- CoalIndustryRetireeHealthBenefitActOf1992Abstract
- Label
- Coal Industry Retiree Health Benefit Act of 1992 [Abstract]
- Period Type
- duration
- Type
- xbrli:stringItemType
- Definition
- 730000 - Disclosure - Compensation Related Costs, Retirement Benefits