PROPERTY, PLANT, EQUIPMENT AND MINING DEVELOPMENT COSTS, NET (Tables)

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment, Net [Abstract]

Property, Plant, Equipment and Mining Development Costs, Net

The components of net property, plant, equipment and mine development costs follow:

	December 31,
	2019			2018
Proven and probable mineral reserves	$	7,087		$	7,089
VBPP	465			477
Mine development and other	8,180			8,195
Buildings and infrastructure	8,435			8,051
Machinery and equipment	13,312			12,985
Mobile equipment	4,320			4,010
Construction in progress	4,265			3,006
Oil and gas properties	27,293			27,292
Total	73,357			71,105
Accumulated depreciation, depletion, and amortizationa	(43,773		)	(43,095		)
Property, plant, equipment and mine development costs, net	$	29,584		$	28,010