United States Department of the Treasury [Member] United States Department of the Treasury C/U/O/US-WV [Member] C/U/O/US-VA [Member] Casa Cantonale AVS [Member] Casa Cantonale AVS UNITED STATES Pension Benefit Guarantee Corporation [Member] Pension Benefit Guarantee Corporation Met [Member] Office of Surface Mining Reclamation and Enforcement [Member] Office of Surface Mining Reclamation and Enforcement SWITZERLAND Internal Revenue Service [Member] Internal Revenue Service Coal [Member] Met Segment [Member]