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PROPERTY, PLANT AND EQUIPMENT (Tables)
 12 Months Ended
Dec. 31, 2018
Property, plant and equipment [abstract]  
Property, plant and equipment
Estimated useful lives of Major Asset Categories
Buildings, plant and equipment
2 – 29 years
Underground mobile equipment
4 - 7 years
Light vehicles and other mobile equipment
2 - 10 years
Furniture, computer and office equipment
1 - 10 years
 
Buildings, plant and equipment

Mining property costs subject to depreciation1,3

Mining property costs not subject to depreciation1,2

Total

At January 1, 2018
 
 
 
 
Net of accumulated depreciation

$4,213


$6,522


$3,071


$13,806

Additions4
(21
)
199

1,050

1,228

Capitalized interest
—

—

9

9

Disposals
(7
)
—

—

(7
)
Depreciation
(790
)
(772
)
—

(1,562
)
Impairment charges
(394
)
(178
)
(76
)
(648
)
Transfers5
599

487

(1,086
)
—

At December 31, 2018

$3,600


$6,258


$2,968


$12,826

At December 31, 2018
 
 
 
 
Cost

$14,750


$21,624


$14,610


$50,984

Accumulated depreciation and impairments
(11,150
)
(15,366
)
(11,642
)
(38,158
)
Net carrying amount – December 31, 2018

$3,600


$6,258


$2,968


$12,826

 
 
 
 
 
 
Buildings, plant and equipment

Mining property costs subject to depreciation1,3

Mining property costs not subject to depreciation1,2

Total

At January 1, 2017
 
 
 
 
Cost

$14,111


$20,778


$14,634


$49,523

Accumulated depreciation and impairments
(9,555
)
(13,584
)
(12,281
)
(35,420
)
Net carrying amount – January 1, 2017

$4,556


$7,194


$2,353


$14,103

Additions4
158

219

1,966

2,343

Disposals
(72
)
(194
)
(931
)
(1,197
)
Depreciation
(878
)
(819
)
—

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

254

Transfers5
551

481

(1,032
)
—

At December 31, 2017

$4,213


$6,522


$3,071


$13,806

At December 31, 2017
 
 
 
 
Cost

$14,209


$20,938


$14,637


$49,784

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

$4,213


$6,522


$3,071


$13,806

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 include construction-in-progress, projects and acquired mineral resources and exploration potential at operating minesites and development projects.
3 
Assets subject to depreciation include 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, 2018

Carrying amount at Dec. 31, 2017

Construction-in-progress1

$786


$640

Acquired mineral resources and exploration potential
124

186

Projects
 
 
   Pascua-Lama
1,245

1,467

Norte Abierto
639

612

   Donlin Gold
174

166

 

$2,968


$3,071

1 
Represents assets under construction at our operating minesites.