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INVENTORIES (Tables) | 12 Months Ended
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Dec. 31, 2018
Inventories [Abstract] |
Inventories and inventory impairment charges |
| Gold | Copper
| As at December 31, 2018 |  | As at December 31, 2017 |  | As at December 31, 2018 |  | As at December 31, 2017 |
Raw materials |  |  |  |
Ore in stockpiles |  | $2,106 |  |  | $2,125 |  |  | $151 |  |  | $102 |
Ore on leach pads | 405 |  | 405 |  | — |  | — |
Mine operating supplies | 496 |  | 515 |  | 66 |  | 79 |
Work in process | 146 |  | 174 |  | — |  | — |
Finished products | 176 |  | 168 |  | 2 |  | 3 |
|  | $3,329 |  |  | $3,387 |  |  | $219 |  |  | $184 |
Non-current ore in stockpiles 1 | (1,696 | ) | (1,681 | ) | — |  | — |
|  | $1,633 |  |  | $1,706 |  |  | $219 |  |  | $184 |
1 | Ore that we do not expect to process in the next 12 months is classified within other long-term assets.
Inventory Impairment Charges |  |
For the years ended December 31 | 2018 |  | 2017 |
Lagunas Norte |  | $166 |  |  | $— |
Lumwana | 18 |  | — |
Golden Sunlight | 10 |  | 6 |
Pierina | 4 |  | 11 |
Porgera | 1 |  | 4 |
Inventory impairment charges 1 |  | $199 |  |  | $21 |
1 | Impairment charges in 2018 primarily relate to stockpiles at Lagunas Norte (refer to note 21). Impairment charges in 2017 primarily relate to leach pad inventories at Pierina.
Ore in Stockpiles |  |
| As at December 31, 2018 |  | As at December 31, 2017 |
Gold |  |
Barrick Nevada |  | $1,083 |  |  | $1,040 |
Pueblo Viejo | 603 |  | 538 |
Kalgoorlie | 125 |  | 138 |
Buzwagi | 83 |  | 109 |
North Mara | 70 |  | 47 |
Lagunas Norte | 49 |  | 147 |
Veladero | 39 |  | 22 |
Porgera | 37 |  | 55 |
Turquoise Ridge | 13 |  | 26 |
Other | 4 |  | 3 |
Copper |  |
Lumwana | 151 |  | 102 |
|  | $2,257 |  |  | $2,227 |
Ore on Leach pads |  |
| As at December 31, 2018 |  | As at December 31, 2017 |
Gold |  |
Lagunas Norte |  | $168 |  |  | $143 |
Veladero | 138 |  | 145 |
Nevada | 81 |  | 105 |
Pierina | 18 |  | 12 |
|  | $405 |  |  | $405 |

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