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PROPERTY, PLANT AND EQUIPMENT (Tables) | 12 Months Ended
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Dec. 31, 2019
Property, plant and equipment [abstract] |
Property, plant and equipment | Estimated useful lives of Major Asset Categories
Buildings, plant and equipment | 1 – 28 years
Underground mobile equipment | 5 - 7 years
Light vehicles and other mobile equipment | 1 - 7 years
Furniture, computer and office equipment | 1 - 7 years
PROPERTY, PLANT AND EQUIPMENT
| Buildings, plant and equipment 1 |  | Mining property costs subject to depreciation 2,4 |  | Mining property costs not subject to depreciation 2,3 |  | Total |
At January 1, 2019 |  |  |  |
Net of accumulated depreciation |  | $3,600 |  |  | $6,258 |  |  | $2,968 |  |  | $12,826 |
Additions 5,6 | 298 |  | 3,458 |  | 1,371 |  | 5,127 |
Capitalized interest | — |  | — |  | 14 |  | 14 |
Acquisitions 8 | 3,473 |  | 2,270 |  | 1,660 |  | 7,403 |
Divestiture 9 | (127 | ) | (106 | ) | (27 | ) | (260 | )
Disposals | (22 | ) | — |  | — |  | (22 | )
Depreciation | (1,107 | ) | (907 | ) | — |  | (2,014 | )
Impairment reversals (charges) | 990 |  | 742 |  | (309 | ) | 1,423 |
Transfers 7 | 648 |  | 573 |  | (1,221 | ) | — |
Assets held for sale | — |  | — |  | (356 | ) | (356 | )
At December 31, 2019 |  | $7,753 |  |  | $12,288 |  |  | $4,100 |  |  | $24,141 |
At December 31, 2019 |  |  |  |
Cost |  | $18,544 |  |  | $27,268 |  |  | $16,050 |  |  | $61,862 |
Accumulated depreciation and impairments | (10,791 | ) | (14,980 | ) | (11,950 | ) | (37,721 | )
Net carrying amount – December 31, 2019 |  | $7,753 |  |  | $12,288 |  |  | $4,100 |  |  | $24,141 |
| Buildings, plant and equipment 1 |  | Mining property costs subject to depreciation 2,4 |  | Mining property costs not subject to depreciation 2,3 |  | Total |
At January 1, 2018 |  |  |  |
Cost |  | $14,209 |  |  | $20,938 |  |  | $14,637 |  |  | $49,784 |
Accumulated depreciation and impairments | (9,996 | ) | (14,416 | ) | (11,566 | ) | (35,978 | )
Net carrying amount – January 1, 2018 |  | $4,213 |  |  | $6,522 |  |  | $3,071 |  |  | $13,806 |
Additions 6 | (21 | ) | 199 |  | 1,050 |  | 1,228 |
Capitalized interest | — |  | — |  | 9 |  | 9 |
Disposals | (7 | ) | — |  | — |  | (7 | )
Depreciation | (790 | ) | (772 | ) | — |  | (1,562 | )
Impairment reversals (charges) | (394 | ) | (178 | ) | (76 | ) | (648 | )
Transfers 7 | 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 |
1 | Additions include $85 million of transitional adjustments for the recognition of leased right-of-use assets upon the Company’s adoption of IFRS 16 on January 1, 2019 (refer to note 2), as well as $49 million of right-of-use assets for lease arrangements entered into during the year ended December 31, 2019. Depreciation includes depreciation for leased right-of-use assets of $25 million for the year ended December 31, 2019. The net carrying amount of leased right-of-use assets was $75 million as at December 31, 2019.
2 | Includes capitalized reserve acquisition costs, capitalized development costs and capitalized exploration and evaluation costs other than exploration license costs included in intangible assets.
3 | Assets not subject to depreciation include construction-in-progress, projects and acquired mineral resources and exploration potential at operating minesites and development projects.
4 | 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.
5 | Additions include $3,422 million of remeasurement gain related to the change in ownership of Turquoise Ridge acquired though the Nevada Joint Venture. Refer to note 4 for further details.
6 | Additions include revisions to the capitalized cost of closure and rehabilitation activities.
7 | Primarily relates to long-lived assets that are transferred between categories within PP&E once they are placed into service.
8 | Acquisitions include assets acquired as part of the Merger and the establishment of Nevada Gold Mines. Refer to note 4 for further details.
9 | Relates to the sale of our 50% interest in Kalgoorlie. Refer to note 4 for further details.
Mineral Property Costs Not Subject to Depreciation
| Carrying amount at Dec. 31, 2019 |  | Carrying amount at Dec. 31, 2018 |
Construction-in-progress 1 |  | $1,009 |  |  | $786 |
Acquired mineral resources and exploration potential | 1,504 |  | 124 |
Projects |  |
Pascua-Lama | 754 |  | 1,245 |
Norte Abierto | 649 |  | 639 |
Donlin Gold | 184 |  | 174 |
|  | $4,100 |  |  | $2,968 |
1 | Represents assets under construction at our operating minesites.

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