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PROPERTY, PLANT, EQUIPMENT AND MINING DEVELOPMENT COSTS, NET (Tables)
 12 Months Ended
Dec. 31, 2016
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,
 
2016
 
2015
Proven and probable mineral reserves
$
3,863

 
$
3,880

VBPP
559

 
559

Mine development and other
5,755

 
4,878

Buildings and infrastructure
7,479

 
6,964

Machinery and equipment
11,744

 
11,558

Mobile equipment
3,725

 
3,843

Construction in progress
2,831

 
3,716

Property, plant, equipment and mine development costs
35,956

 
35,398

Accumulated depreciation, depletion and amortization
(12,737
)
 
(11,412
)
Property, plant, equipment and mine development costs, net
$
23,219

 
$
23,986