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STREAM AND ROYALTY ACQUISITIONS (Details) $ in Millions |  |  |  |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2025 oz | Sep. 30, 2025 USD ($) | Aug. 05, 2025 USD ($) oz | May 21, 2025 kilometer oz | May 16, 2025 USD ($) | Mar. 28, 2025 USD ($) oz | Mar. 31, 2026 USD ($) | Dec. 31, 2025 USD ($) oz
Revolving Credit Facility | Credit Facility | Line of Credit |  |  |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |  |  |
Proceeds from lines of credit | $ |  |  | $ 825.0 |  |  |  |  |
Kansanshi Gold Stream Acquisition |  |  |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |  |  |
Cash consideration paid | $ |  |  | $ 1,000.0 |  |  |  |  |
Kansanshi Gold Stream Acquisition | Production Threshold One |  |  |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |  |  |
Asset acquisition, ounces of gold produced per million pounds of recovered copper | oz |  |  | 75 |  |  |  |  |
Asset acquisition, gold delivered, weight (ounces) | oz |  |  | 425,000 |  |  |  |  |
Kansanshi Gold Stream Acquisition | Production Threshold Two |  |  |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |  |  |
Asset acquisition, ounces of gold produced per million pounds of recovered copper | oz |  |  | 55 |  |  |  |  |
Kansanshi Gold Stream Acquisition | Production Threshold Two | Minimum |  |  |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |  |  |
Asset acquisition, gold delivered, weight (ounces) | oz |  |  | 425,001 |  |  |  |  |
Kansanshi Gold Stream Acquisition | Production Threshold Two | Maximum |  |  |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |  |  |
Asset acquisition, gold delivered, weight (ounces) | oz |  |  | 650,000 |  |  |  |  |
Kansanshi Gold Stream Acquisition | Production Threshold Three |  |  |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |  |  |
Asset acquisition, ounces of gold produced per million pounds of recovered copper | oz |  |  | 45 |  |  |  |  |
Kansanshi Gold Stream Acquisition | Acceleration Option 1 |  |  |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |  |  |
Adjusted ratio of debt to earnings before interest, taxes, depreciation and amortization |  |  | 2.25 |  |  |  |  |
Asset acquisition, gold option, exercisable period (in years) |  |  | 1 year |  |  |  |  |
Asset acquisition, gold deliverable, value | $ |  |  | $ 200.0 |  |  |  |  |
Asset acquisition, gold deliverable, threshold period (in months) |  |  | 14 months |  |  |  |  |
Asset acquisition, reduction in stream rate and delivery thresholds, percentage |  |  | 20.00% |  |  |  |  |
Asset acquisition, cash purchase price, percentage of spot price, gold |  |  | 20.00% |  |  |  |  |
Kansanshi Gold Stream Acquisition | Acceleration Option 2 |  |  |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |  |  |
Adjusted ratio of debt to earnings before interest, taxes, depreciation and amortization |  |  | 1.25 |  |  |  |  |
Asset acquisition, gold option, exercisable period (in years) |  |  | 1 year |  |  |  |  |
Asset acquisition, gold deliverable, value | $ |  |  | $ 100.0 |  |  |  |  |
Asset acquisition, gold deliverable, threshold period (in months) |  |  | 7 months |  |  |  |  |
Asset acquisition, reduction in stream rate and delivery thresholds, percentage |  |  | 10.00% |  |  |  |  |
Asset acquisition, cash purchase price, percentage of spot price, gold |  |  | 35.00% |  |  |  |  |
Warintza Project Stream and Royalty |  |  |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |  |  |
Conditional funding from acquisition | $ |  |  |  |  |  |  |  | $ 100.0
Warintza Project Stream and Royalty | Forecast |  |  |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |  |  |
Cash consideration paid | $ |  |  |  |  |  |  | $ 200.0 |
Asset acquisition, cash paid for royalty and streaming agreements | $ |  |  |  |  |  |  | 100.0 |
Warintza Project Stream and Royalty | Environmental Impact Milestone | Forecast |  |  |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |  |  |
Conditional funding from acquisition | $ |  |  |  |  |  |  | 50.0 |
Warintza Project Stream and Royalty | Security Milestone | Forecast |  |  |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |  |  |
Conditional funding from acquisition | $ |  |  |  |  |  |  | $ 50.0 |
Gold Stream Agreement |  |  |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |  |  |
Asset acquisition, ounces of gold produced per million pounds of recovered copper | oz |  |  |  | 20 |  |  |  |
Asset acquisition, cash purchase price, percentage of spot price, gold |  |  |  | 20.00% |  |  |  |
Asset acquisition, gold delivery, threshold, ounces | oz |  |  |  | 90,000 |  |  |  |
Asset acquisition, spot price, gold, percentage |  |  |  | 60.00% |  |  |  |
Gold Stream Agreement | Minimum |  |  |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |  |  |
Area of interest | kilometer |  |  |  | 31 |  |  |  |
Gold Stream Agreement | Maximum |  |  |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |  |  |
Area of interest | kilometer |  |  |  | 186 |  |  |  |
Gold Stream Royalty Agreement |  |  |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |  |  |
Area of interest | kilometer |  |  |  | 186 |  |  |  |
Net smelter return (NSR) percentage |  |  |  | 0.30% |  |  |  |
Asset acquisition, annually increased NSR rate |  |  |  | 0.0375% |  |  |  |
Asset acquisition, maximum of NSR rate |  |  |  | 0.60% |  |  |  |
Asset acquisition, early termination, NSR rate |  |  |  | 0.0060 |  |  |  |
Asset acquisition, area of interest, reduction | kilometer |  |  |  | 31 |  |  |  |
Lawyers Ranch Project Royalty |  |  |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |  |  |
Cash consideration paid | $ |  |  |  |  | $ 12.5 |  |  |
Net smelter return (NSR) percentage |  |  |  |  | 2.00% |  |  |
Additional Xavantina Stream |  |  |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |  |  |
Cash consideration paid | $ |  | $ 50.0 |  |  |  | $ 50.0 |  |
Asset acquisition, gold delivery, threshold, ounces | oz | 160,000 |  |  |  |  | 93,000 |  | 160,000
Asset acquisition, spot price, gold, percentage | 40.00% |  |  |  |  |  |  |
Asset acquisition, stream rate, percentage | 25.00% |  |  |  |  |  |  |
Xavantina Base Stream And Additional Stream |  |  |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |  |  |
Asset acquisition, gold delivered, weight (ounces) | oz | 54,900 |  |  |  |  |  |  | 54,900
Asset acquisition, cash purchase price, percentage of spot price, gold | 20.00% |  |  |  |  |  |  | 20.00%
Asset acquisition, gold delivery, threshold, ounces | oz | 49,000 |  |  |  |  |  |  | 49,000
Asset acquisition, spot price, gold, percentage | 40.00% |  |  |  |  |  |  |
Kansanshi | Subsidiary Of First Quantum Minerals Ltd |  |  |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |  |  |
Ownership interest held by parent, percentage |  |  | 0.80 |  |  |  |  |

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