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REVENUE - Narrative (Details) ozt in Thousands, lb in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2022 USD ($) customers lb ozt $ / ounce $ / pound | Dec. 31, 2021 USD ($) lb ozt $ / ounce $ / pound
Disclosure of major customers [line items] |  |
Number of customers who accounts for more than ten percent of revenue | customers | 4 |
Minimum percentage of entity revenue for major customers | 10.00% |
Gold |  |
Disclosure of provisional metal sales |  |
Percentage of composition of principal product (as percent) | 90.00% |
Volumes subject to final pricing Copper (millions) Gold (000s) | ozt | 42 | 41
Impact on net income before taxation of 10% movement in market price | $ 8 | $ 8
Average price of sales subject to final settlement | $ / ounce | 1,824 | 1,819
Percent change in commodity prices used for sensitivity analysis | 10.00% |
Copper |  |
Disclosure of provisional metal sales |  |
Volumes subject to final pricing Copper (millions) Gold (000s) | lb | 60 | 45
Impact on net income before taxation of 10% movement in market price | $ 23 | $ 20
Average price of sales subject to final settlement | $ / pound | 3.80 | 4.34
Percent change in commodity prices used for sensitivity analysis | 10.00% |
Customer 1 [Member] |  |
Disclosure of major customers [line items] |  |
Percentage of entity's revenue | 23.00% |
Customer 2 [Member] |  |
Disclosure of major customers [line items] |  |
Percentage of entity's revenue | 14.00% |
Customer 3 [Member] |  |
Disclosure of major customers [line items] |  |
Percentage of entity's revenue | 11.00% |
Customer 4 [Member] |  |
Disclosure of major customers [line items] |  |
Percentage of entity's revenue | 11.00% |

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