M&EC (Tables)  | 
6 Months Ended | |||||||||||||||||||||||||
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Jun. 30, 2019  | ||||||||||||||||||||||||||
| Asset Retirement Obligation Disclosure [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: 
 
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- References No definition available. 
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- Definition 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 
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