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COST OF SALES (Tables) | 12 Months Ended
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Dec. 31, 2018
Analysis of income and expense [abstract] |
Cost of sales |
| Gold | Copper | Other 4 | Total
For the years ended December 31 | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017 |
Direct mining cost 1,2,3 |  | $3,130 |  |  | $3,063 |  |  | $344 |  |  | $274 |  |  | $7 |  |  | $28 |  |  | $3,481 |  |  | $3,365 |
Depreciation | 1,253 |  | 1,529 |  | 170 |  | 83 |  | 34 |  | 35 |  | 1,457 |  | 1,647 |
Royalty expense | 196 |  | 206 |  | 39 |  | 38 |  | — |  | — |  | 235 |  | 244 |
Community relations | 42 |  | 38 |  | 5 |  | 4 |  | — |  | 2 |  | 47 |  | 44 |
Total |  | $4,621 |  |  | $4,836 |  |  | $558 |  |  | $399 |  |  | $41 |  |  | $65 |  |  | $5,220 |  |  | $5,300 |
1 | Direct mining cost related to gold and copper includes charges to reduce the cost of inventory to net realizable value of $199 million (2017: $21 million). Refer to note 17.
2 | Direct mining cost related to gold includes the costs of extracting by-products and export duties paid in Argentina.
3 | Includes employee costs of $1,001 million (2017: $1,051 million).
4 | Other includes realized hedge gains and losses and corporate amortization.

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