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INVENTORIES INVENTORIES (Notes) | 12 Months Ended
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Dec. 31, 2019
Disclosure of inventories [Abstract] |
Disclosure of inventories [text block] | INVENTORIES
| Gold | Copper
| As at December 31, 2019 |  | As at December 31, 2018 |  | As at December 31, 2019 |  | As at December 31, 2018 |
Raw materials |  |  |  |
Ore in stockpiles |  | $2,794 |  |  | $2,106 |  |  | $155 |  |  | $151 |
Ore on leach pads | 507 |  | 405 |  | — |  | — |
Mine operating supplies | 617 |  | 496 |  | 52 |  | 66 |
Work in process | 141 |  | 146 |  | — |  | — |
Finished products | 220 |  | 176 |  | 103 |  | 2 |
|  | $4,279 |  |  | $3,329 |  |  | $310 |  |  | $219 |
Non-current ore in stockpiles 1 | (2,300 | ) | (1,696 | ) | — |  | — |
|  | $1,979 |  |  | $1,633 |  |  | $310 |  |  | $219 |
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 | 2019 |  | 2018 |
Pierina |  | $12 |  |  | $4 |
Carlin | 6 |  | — |
Cortez | 4 |  | — |
Golden Sunlight | 4 |  | 10 |
Lagunas Norte | — |  | 166 |
Lumwana | — |  | 18 |
Porgera | — |  | 1 |
Inventory impairment charges 1 |  | $26 |  |  | $199 |
1 | Impairment charges in 2018 primarily relate to stockpiles at Lagunas Norte (refer to note 21).
Ore in Stockpiles | As at December 31, 2019 |  | As at December 31, 2018 |
Gold |  |
Carlin |  | $1,136 |  |  | $841 |
Pueblo Viejo | 649 |  | 603 |
Turquoise Ridge | 258 |  | 13 |
Cortez | 174 |  | 242 |
Loulo-Gounkoto | 167 |  | — |
North Mara | 136 |  | 70 |
Lagunas Norte | 73 |  | 49 |
Veladero | 52 |  | 39 |
Buzwagi | 47 |  | 83 |
Phoenix | 39 |  | — |
Porgera | 33 |  | 37 |
Tongon | 29 |  | — |
Kalgoorlie | — |  | 125 |
Other | 1 |  | 4 |
Copper |  |
Lumwana | 155 |  | 151 |
|  | $2,949 |  |  | $2,257 |
Ore on Leach pads | As at December 31, 2019 |  | As at December 31, 2018 |
Gold |  |
Lagunas Norte |  | $148 |  |  | $168 |
Veladero | 123 |  | 138 |
Carlin | 64 |  | — |
Cortez | 50 |  | 81 |
Phoenix | 44 |  | — |
Long Canyon | 43 |  | — |
Turquoise Ridge | 33 |  | — |
Pierina | 2 |  | 18 |
|  | $507 |  |  | $405 |
Purchase Commitments At December 31, 2019, we had purchase obligations for supplies and consumables of approximately $1,681 million (2018: $1,972 million).

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