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PROPERTY, PLANT AND EQUIPMENT (Tables)
 12 Months Ended
Dec. 31, 2017
Property, plant and equipment [abstract]  
Property, plant and equipment
Estimated useful lives of Major Asset Categories
Buildings, plant and equipment
7 – 27 years
Underground mobile equipment
5 - 7 years
Light vehicles and other mobile equipment
2 - 3 years
Furniture, computer and office equipment
2 - 3 years
 
Buildings, plant and equipment

Mining property costs subject to depreciation1,3

Mining property costs not subject to depreciation1,2

Total

At January 1, 2017
 
 
 
 
Net of accumulated depreciation

$4,556


$7,194


$2,353


$14,103

Additions4
158

219

1,966

2,343

Disposals
(72
)
(32
)
(1,093
)
(1,197
)
Depreciation
(878
)
(819
)
—

(1,697
)
Impairment reversals
(102
)
(359
)
715

254

Transfers5
551

449

(1,000
)
—

At December 31, 2017

$4,213


$6,652


$2,941


$13,806

At December 31, 2017
 
 
 
 
Cost

$14,209


$21,068


$14,507


$49,784

Accumulated depreciation and impairments
(9,996
)
(14,416
)
(11,566
)
(35,978
)
Net carrying amount – December 31, 2017

$4,213


$6,652


$2,941


$13,806

 
 
 
 
 
 
Buildings, plant and equipment

Mining property costs subject to depreciation1,3

Mining property costs not subject to depreciation1,2

Total

At January 1, 2016
 
 
 
 
Cost

$13,782


$19,968


$14,734


$48,484

Accumulated depreciation and impairments
(9,098
)
(12,668
)
(12,284
)
(34,050
)
Net carrying amount – January 1, 2016

$4,684


$7,300


$2,450


$14,434

Additions4
71

272

933

1,276

Disposals
(80
)
—

(37
)
(117
)
Depreciation
(794
)
(995
)
—

(1,789
)
Impairment charges
217

79

3

299

Transfers5
458

538

(996
)
—

At December 31, 2016

$4,556


$7,194


$2,353


$14,103

At December 31, 2016
 
 
 
 
Cost

$14,111


$20,778


$14,634


$49,523

Accumulated depreciation and impairments
(9,555
)
(13,584
)
(12,281
)
(35,420
)
Net carrying amount – December 31, 2016

$4,556


$7,194


$2,353


$14,103

1 
Includes capitalized reserve acquisition costs, capitalized development costs and capitalized exploration and evaluation costs other than exploration license costs included in intangible assets.
2 
Assets not subject to depreciation includes construction-in-progress, projects and acquired mineral resources and exploration potential at operating mine sites and development projects.
3 
Assets subject to depreciation includes the following items for production stage properties: acquired mineral reserves and resources, capitalized mine development costs, capitalized stripping and capitalized exploration and evaluation costs.
4 
Additions include revisions to the capitalized cost of closure and rehabilitation activities.
5 
Primarily relates to long-lived assets that are transferred to PP&E once they are placed into service.
Mineral Property Costs Not Subject to Depreciation
 
Carrying amount at Dec. 31, 2017

Carrying amount at Dec. 31, 2016

Construction-in-progress1

$640


$466

Acquired mineral resources and exploration potential
24

24

Projects
 
 
   Pascua-Lama
1,499

1,263

Norte Abierto
612

444

   Donlin Gold
166

156

 

$2,941


$2,353

1 
Represents assets under construction at our operating mine sites.