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Acquisitions and other transactions (Details) |  |  |  |  |  |  |  |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 23, 2019 CAD ($) | Nov. 22, 2019 CAD ($) a | Sep. 25, 2019 USD ($) item | Jul. 22, 2019 USD ($) a | Feb. 21, 2019 USD ($) | Jan. 31, 2019 USD ($) | Feb. 28, 2018 AUD ($) item | Jan. 19, 2018 USD ($) $ / oz item oz | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 23, 2019 USD ($) | Feb. 21, 2019 CAD ($) | Feb. 21, 2019 USD ($) | Feb. 20, 2018 USD ($)
South Central Oklahoma Oil Province And Sooner Trend Anadarko Basin Canadian And Kingfisher Countries |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total contributions made |  |  |  |  |  |  |  |  | $ 114,400,000 | $ 261,800,000 |  |  |  |
Cumulative investment in royalty acquisition venture |  |  |  |  |  |  |  |  | 376,200,000 |  |  |  |  |
South Central Oklahoma Oil Province And Sooner Trend Anadarko Basin Canadian And Kingfisher Countries | Top |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total cumulative investment |  |  |  |  |  |  |  |  | 143,800,000 |  |  |  |  |
South Central Oklahoma Oil Province And Sooner Trend Anadarko Basin Canadian And Kingfisher Countries | Accounts payable |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  |  |  |  | $ 5,600,000 |  |  |  |  |
Amended and restated Cobre Panama Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of the project covered by the amended and restated agreement (as a percent) |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |
Ownership percentage of the project by First Quantum (as a percent) |  |  |  |  |  |  |  | 90.00% |  |  |  |  |  |
Ownership percentage of project by KORES (as a percent) |  |  |  |  |  |  |  | 10.00% |  |  |  |  |  |
Number of distinct precious metals streams | item |  |  |  |  |  |  |  | 2 |  |  |  |  |  |
Amended and restated Cobre Panama Agreement - Fixed Payment Stream |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount funded by the company |  |  |  |  |  |  |  |  |  | $ 273,400,000 |  |  |  |
First Quantum's initial interest percent in original stream (as a percent) |  |  |  |  |  |  |  | 80.00% |  |  |  |  |  |
Payment for each ounce of gold (in dollars per ounce) | $ / oz |  |  |  |  |  |  |  | 418.00 |  |  |  |  |  |
Payment for each ounce of silver (in dollars per ounce) | $ / oz |  |  |  |  |  |  |  | 6.27 |  |  |  |  |  |
The annual inflation factor rate (as a percent) |  |  |  |  |  |  |  | 1.50% |  |  |  |  |  |
Quantity of delivered gold ounces before purchase decreases to next threshold from initial threshold | oz |  |  |  |  |  |  |  | 1,341,000 |  |  |  |  |  |
Maximum ounces of silver on which on-going price of spot price is payable | oz |  |  |  |  |  |  |  | 21,500,000 |  |  |  |  |  |
Percentage of spot price of gold on which on-going price is paid after maximum ounces have been delivered |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |
Percentage of spot price of silver on which on-going price is paid after maximum ounces have been delivered |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |
Deposit funded on a pro-rata basis |  |  |  |  |  |  |  | 33.33% |  |  |  |  |  |
Amended and restated Cobre Panama Agreement - Fixed Payment Stream | Top |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deposit provided to acquiree |  |  |  |  |  |  |  | $ 1,000,000,000 |  |  |  |  |  |
Amended and restated Cobre Panama Agreement - Floating Payment Stream |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount funded by the company |  |  |  |  |  |  |  | $ 356,000,000 |  |  |  |  |  |
First Quantum additional interest percent in project acquired from LS-Nikko Copper Inc. (as a percent) |  |  |  |  |  |  |  | 10.00% |  |  |  |  |  |
KORES interest percent in project (as a percent) |  |  |  |  |  |  |  | 10.00% |  |  |  |  |  |
Percentage of spot price of gold and silver on which on-going price is paid |  |  |  |  |  |  |  | 20.00% |  |  |  |  |  |
Maximum ounces of gold on which on-going price of spot price is payable | oz |  |  |  |  |  |  |  | 604,000 |  |  |  |  |  |
Maximum ounces of silver on which on-going price of spot price is payable | oz |  |  |  |  |  |  |  | 9,618,000 |  |  |  |  |  |
Percentage of spot price of gold and silver on which on-going price is paid after maximum ounces have been delivered |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |
Bowen Basin Coal Royalties, Australia |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of additional exploration tenements | item |  |  |  |  |  |  | 33 |  |  |  |  |  |  |
Cash transferred |  |  |  |  |  |  | $ 4,200,000 |  |  |  |  |  |  |
Royalty rate per tonne |  |  |  |  |  |  | $ 0.10 |  |  |  |  |  |  |
U.S. Oil & Gas Royalties - Delaware Texas |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 101,300,000
Salares Norte Royalty Interest |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  | $ 32,000,000 |  |  |  |  |  |  |  |
Percentage of NSR |  |  |  |  |  | 2.00% |  |  |  |  |  |  |  |
Cash transferred |  |  |  |  |  | $ 5,000,000 |  |  |  |  |  |  |  |
Option to buy back of NSR (as a percent) |  |  |  |  |  | 1.00% |  |  |  |  |  |  |  |
Value of option to buy back of NSR |  |  |  |  |  | $ 6,000,000 |  |  |  |  |  |  |  |
Period to buy back of NSR |  |  |  |  |  | 24 months |  |  |  |  |  |  |  |
Salares Norte Royalty Interest | Common shares |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value of common shares issued in acquisition |  |  |  |  |  | $ 27,000,000 |  |  |  |  |  |  |  |
Number of common shares issued in acquisition (in share) |  |  |  |  |  | 366,499 |  |  |  |  |  |  |  |
Valentine Lake Royalty Interest |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  |  |  |  |  |  |  | $ 18,000,000 | $ 13,700,000 |
Percentage of NSR |  |  |  |  | 2.00% |  |  |  |  |  |  |  |  |
Option to buy back of NSR (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 0.50% | 0.50% |
Value of option to buy back of NSR |  |  |  |  | $ 7,000,000 |  |  |  |  |  |  |  |  |
Eagle's Nest Royalty Interest - Ontario, Canada |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquired gross royalty percent | 1.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred | $ 5,000,000 |  |  |  |  |  |  |  |  |  | $ 3,800,000 |  |  |
Project 81 Royalty Interest And Noble Common Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  | $ 500,000 |  |  |  |  |  |  |  |  |  |  |  |
Percentage of NSR |  | 2.00% |  |  |  |  |  |  |  |  |  |  |  |
Number of royalties acquired | a |  | 55,000 |  |  |  |  |  |  |  |  |  |  |  |
Premier Gold Royalty Interests |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  | $ 6,000,000 |  |  |  |  |  |  |  |  |  |  |
Number of royalties acquired | item |  |  | 2 |  |  |  |  |  |  |  |  |  |  |
Premier Gold Royalty Interests | Newmont Goldcorp Corporation |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of NSR |  |  | 2.00% |  |  |  |  |  |  |  |  |  |  |
Premier Gold Royalty Interests | Nevada Gold Mines L L C |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of NSR |  |  | 1.50% |  |  |  |  |  |  |  |  |  |  |
US Oil Gas Royalties Interests Marcellus, Pennsylvania |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  | $ 300,000,000 |  |  |  |  |  |  |  |  |  |
Percentage of gross production |  |  |  | 1.00% |  |  |  |  |  |  |  |  |  |
Number of acres allowed as deduction | a |  |  |  | 350,000 |  |  |  |  |  |  |  |  |  |
Value of royalties generated by the acquired assets |  |  |  | $ 9,400,000 |  |  |  |  |  |  |  |  |  |

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