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REVENUE (Tables) | 12 Months Ended
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Dec. 31, 2018
Revenue [abstract] |
Revenue |
For the years ended December 31 | 2018 |  | 2017 |
Gold sales 1 |  |
Spot market sales |  | $6,575 |  |  | $7,566 |
Concentrate sales | 25 |  | 64 |
Provisional pricing adjustments | — |  | 1 |
|  | $6,600 |  |  | $7,631 |
Copper sales 1 |  |
Copper concentrate sales |  | $549 |  |  | $608 |
Provisional pricing adjustments | (37 | ) | — |
|  | $512 |  |  | $608 |
Other sales 2 |  | $131 |  |  | $135 |
Total |  | $7,243 |  |  | $8,374 |
1 | Revenues include amounts transferred from OCI to earnings for commodity cash flow hedges (see note 25d).
2 | Revenues include the sale of by-products from our gold and copper mines.
Disclosure of provisionally prices sales | Our exposure at December 31, 2018 to the impact of movements in market commodity prices for provisionally priced sales is set out in the following table:
| Volumes subject to final pricing Copper (millions) |  | Impact on net income before taxation of 10% movement in market price US$ |
As at December 31 | 2018 |  | 2017 |  | 2018 |  | 2017 |
Copper pounds | 51 |  | 57 |  |  | $14 |  |  | $19 |

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