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REVENUE - Narrative (Details) t in Thousands, oz in Thousands, lb in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2024 customers $ / pound $ / ounce | Dec. 31, 2024 $ / pound $ / ounce | Dec. 31, 2024 lb $ / pound $ / ounce | Dec. 31, 2024 USD ($) $ / pound $ / ounce | Dec. 31, 2024 oz $ / pound $ / ounce | Dec. 31, 2024 t $ / pound $ / ounce | Dec. 31, 2023 lb $ / ounce $ / pound | Dec. 31, 2023 USD ($) $ / ounce $ / pound | Dec. 31, 2023 oz $ / ounce $ / pound | Dec. 31, 2023 t $ / ounce $ / pound
Disclosure of major customers [abstract] |  |  |  |  |  |  |  |  |  |
Number of customers who accounts for more than ten percent of revenue | customers | 2 |  |  |  |  |  |  |  |  |
Minimum percentage of entity revenue for major customers |  | 10.00% |  |  |  |  |  |  |  |
Disclosure of major customers [line items] |  |  |  |  |  |  |  |  |  |
Number of customers who accounts for more than ten percent of revenue | customers | 2 |  |  |  |  |  |  |  |  |
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% | 90.00% | 90.00% | 90.00% | 90.00% | 90.00% |  |  |  |
Volumes subject to final pricing Copper (millions) Gold (000s) | oz |  |  |  |  | 48 |  |  |  | 50 |
Impact on net income before taxation of 10% movement in market price | $ |  |  |  | $ 13 |  |  |  | $ 10 |  |
Average price of sales subject to final settlement | $ / ounce | 2,636 | 2,636 | 2,636 | 2,636 | 2,636 | 2,636 | 2,079 | 2,079 | 2,079 | 2,079
Percent change in commodity prices used for sensitivity analysis | 10.00% | 10.00% | 10.00% | 10.00% | 10.00% | 10.00% |  |  |  |
Copper |  |  |  |  |  |  |  |  |  |
Disclosure of provisional metal sales |  |  |  |  |  |  |  |  |  |
Volumes subject to final pricing Copper (millions) Gold (000s) |  |  | 63 |  |  | 28 | 61 |  |  | 28
Impact on net income before taxation of 10% movement in market price | $ |  |  |  | $ 25 |  |  |  | $ 23 |  |
Average price of sales subject to final settlement | $ / pound | 4.04 | 4.04 | 4.04 | 4.04 | 4.04 | 4.04 | 3.81 | 3.81 | 3.81 | 3.81
Customer 1 [Member] |  |  |  |  |  |  |  |  |  |
Disclosure of major customers [abstract] |  |  |  |  |  |  |  |  |  |
Percentage of entity's revenue |  | 23.00% |  |  |  |  |  |  |  |
Disclosure of major customers [line items] |  |  |  |  |  |  |  |  |  |
Percentage of entity's revenue |  | 23.00% |  |  |  |  |  |  |  |
Customer 2 [Member] |  |  |  |  |  |  |  |  |  |
Disclosure of major customers [abstract] |  |  |  |  |  |  |  |  |  |
Percentage of entity's revenue |  | 22.00% |  |  |  |  |  |  |  |
Disclosure of major customers [line items] |  |  |  |  |  |  |  |  |  |
Percentage of entity's revenue |  | 22.00% |  |  |  |  |  |  |  |

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