v3.25.2
Segment Reporting - Financials (Details)
$ in Millions
 3 Months Ended 6 Months Ended 9 Months Ended
Jun. 30, 2025
USD ($)
Dec. 31, 2024
segment
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2024
USD ($)
Sep. 30, 2024
segment
Segment Reporting            
Number of reportable segments | segment   3       2
Revenue            
Revenue from royalty, streams and working interests $ 366.7   $ 257.6 $ 732.2 $ 513.2  
Interest revenue 2.7   2.2 5.6 3.1  
Other interest income     0.3   0.6  
Total revenue 369.4   260.1 737.8 516.9  
Expenses            
Costs of sales 33.5   29.1 72.0 62.7  
Depletion and depreciation 64.0   52.9 132.4 111.1  
Gross profit 271.9   178.1 533.4 343.1  
Other operating expenses (income)            
General and administrative expenses 5.7   7.6 14.4 11.8  
Share-based compensation expense 2.8   1.8 8.5 4.6  
Cobre Panama arbitration expense 3.9   0.8 4.6 2.3  
Impairment reversal (4.1)     (4.1)    
Gain on sale of gold and silver bullion (Note 7) (42.2)   (1.1) (49.3) (2.5)  
Foreign exchange (gain) loss and other (income) expenses (4.1)   9.8 (9.8) 11.4  
Income before finance items and income taxes 309.9   159.2 569.1 315.8  
Finance items            
Finance income 6.6   16.2 17.7 32.2  
Finance expenses (0.8)   (0.6) (1.5) (1.2)  
Net income before income taxes 315.7   174.8 585.3 346.8  
Operating Segments            
Revenue            
Revenue from royalty, streams and working interests 366.7   257.6 732.2 513.2  
Interest revenue 2.7   2.2 5.6 3.1  
Other interest income     0.3   0.6  
Total revenue 369.4   260.1 737.8 516.9  
Expenses            
Costs of sales 33.5   29.1 72.0 62.7  
Depletion and depreciation 63.8   51.9 132.1 109.9  
Gross profit 272.1   179.1 533.7 344.3  
Other operating expenses (income)            
General and administrative expenses 5.7   7.6 14.4 11.8  
Share-based compensation expense 2.8   1.8 8.5 4.6  
Cobre Panama arbitration expense 3.9   0.8 4.6 2.3  
Impairment reversal (4.1)     (4.1)    
Gain on disposal of royalty interests         (0.3)  
Gain on sale of gold and silver bullion (Note 7) (42.2)   (1.1) (49.3) (2.5)  
Depreciation 0.2   1.0 0.3 1.2  
Foreign exchange (gain) loss and other (income) expenses (4.1)   9.8 (9.8) 11.4  
Income before finance items and income taxes 309.9   159.2 569.1 315.8  
Finance items            
Finance income 6.6   16.2 17.7 32.2  
Finance expenses (0.8)   (0.6) (1.5) (1.2)  
Net income before income taxes 315.7   174.8 585.3 346.8  
Operating Segments | Precious metals            
Revenue            
Revenue from royalty, streams and working interests 304.0   193.0 594.7 387.0  
Interest revenue 2.7   2.2 5.6 3.1  
Other interest income     0.3   0.6  
Total revenue 306.7   195.5 600.3 390.7  
Expenses            
Costs of sales 31.1   26.6 65.1 57.2  
Depletion and depreciation 44.8   35.3 91.9 73.0  
Gross profit 230.8   133.6 443.3 260.5  
Operating Segments | Other mining            
Revenue            
Revenue from royalty, streams and working interests 10.2   13.7 27.0 31.5  
Total revenue 10.2   13.7 27.0 31.5  
Expenses            
Depletion and depreciation 2.8   2.9 7.7 6.5  
Gross profit 7.4   10.8 19.3 25.0  
Operating Segments | Energy            
Revenue            
Revenue from royalty, streams and working interests 52.5   50.9 110.5 94.7  
Total revenue 52.5   50.9 110.5 94.7  
Expenses            
Costs of sales 2.4   2.5 6.9 5.5  
Depletion and depreciation 16.2   13.7 32.5 30.4  
Gross profit $ 33.9   $ 34.7 $ 71.1 $ 58.8