East Tennessee Materials and Energy Corporation (''M&EC'') (Tables)
|3 Months Ended|
Mar. 31, 2019
|Discontinued Operations and Disposal Groups [Abstract]|
|Schedule of Change in Asset Retirement Obligation||
The following reflects changes to the closure liabilities for the M&EC facility from year end 2018:
Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation.
Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef