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GOODWILL AND OTHER INTANGIBLE ASSETS (Tables) | 12 Months Ended
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Dec. 31, 2020
Goodwill and Other Intangible Assets [Abstract] |
Intangible assets |
a) Intangible Assets |  |  |  |  |  |
| Water rights 1 | Technology 2 | Supply contracts 3 | Exploration potential 4 | Total |
Opening balance January 1, 2019 | $71 |  | $8 |  | $8 |  | $140 |  | $227 |  |
Additions | 1 |  | — |  | — |  | — |  | 1 |  |
Amortization and impairment losses | — |  | (1) |  | (1) |  | — |  | (2) |  |
Closing balance December 31, 2019 | $72 |  | $7 |  | $7 |  | $140 |  | $226 |  |
Additions | — |  | — |  | — |  | 5 |  | 5 |  |
Disposals 5 | (5) |  | — |  | — |  | (41) |  | (46) |  |
Amortization and impairment losses | — |  | (1) |  | (3) |  | (12) |  | (16) |  |
Closing balance December 31, 2020 | $67 |  | $6 |  | $4 |  | $92 |  | $169 |  |
Cost | $67 |  | $17 |  | $39 |  | $262 |  | $385 |  |
Accumulated amortization and impairment losses | — |  | (11) |  | (35) |  | (170) |  | (216) |  |
Net carrying amount December 31, 2020 | $67 |  | $6 |  | $4 |  | $92 |  | $169 |  |
1 Relates to water rights in South America, and will be amortized through cost of sales when we begin using these in the future. 2 The amount is amortized through cost of sales using the UOP method over LOM ounces of the Pueblo Viejo mine, with no assumed residual value. 3 Relates to a supply agreement with Michelin North America Inc. to secure a supply of tires and is amortized over the effective term of the contract through cost of sales. 4 Exploration potential consists of the estimated fair value attributable to exploration licenses acquired as a result of a business combination or asset acquisition. The carrying value of the licenses will be transferred to PP&E when the development of attributable mineral resources commences. 5 Exploration potential disposals primarily relate to the sale of Acacia exploration properties.
Goodwill |
| Closing balance December 31, 2019 | Additions |  | Disposals | Closing balance December 31, 2020 |
Carlin | $1,294 |  | $— |  |  | $— |  | $1,294 |  |
Cortez | 724 |  | — |  |  | — |  | 724 |  |
Turquoise Ridge | 722 |  | — |  |  | — |  | 722 |  |
Phoenix | 119 |  | — |  |  | — |  | 119 |  |
Goldrush | 175 |  | — |  |  | — |  | 175 |  |
Hemlo | 63 |  | — |  |  | — |  | 63 |  |
Loulo-Gounkoto | 1,672 |  | — |  |  | — |  | 1,672 |  |
Total | $4,769 |  | $— |  |  | $— |  | $4,769 |  |
On a total basis, the gross amount and accumulated impairment losses are as follows:
Cost | $12,211 |
Accumulated impairment losses December 31, 2020 | (7,442) |
Net carrying amount December 31, 2020 | $4,769 |

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