v3.26.1
Revenue and expenses (Tables)
12 Months Ended
Dec. 31, 2025
Analysis of income and expense [abstract]  
Disclosure of detailed information about revenue [Table Text Block]
    Year ended
December 31,
 
    2025     2024  
Copper $ 1,161.5   $ 1,154.8  
Gold   794.4     673.6  
Zinc   43.5     71.1  
Silver   53.6     51.5  
Molybdenum   63.9     60.1  
Other   -     1.7  
Revenue from contracts   2,116.9     2,012.8  
Non-cash streaming arrangement items: 1            
Amortization of deferred revenue - gold   31.3     40.7  
Amortization of deferred revenue - silver   33.8     33.6  
Amortization of deferred revenue - variable consideration adjustments - prior periods   9.9     (3.8 )
    75.0     70.5  
Pricing and volume adjustments 2   47.5     35.2  
    2,239.4     2,118.5  
Treatment and refining charges   (28.4 )   (97.3 )
  $ 2,211.0   $ 2,021.2  
Disclosure of depreciation and amortization expense [Table Text Block]
    Year ended
December 31,
 
    2025     2024  
Cost of sales $ 439.7   $ 426.6  
Selling and administrative expenses   1.5     1.4  
  $ 441.2   $ 428.0  
Disclosure of detailed information about share-based compensation expenses (recoveries) [Table Text Block]
    Cash-settled          

Total share-

based

compensation

expense

 
  RSUs     DSUs     PSUs     Stock options  
Year ended December 31, 2025                          
Cost of sales $ 5.9   $ -   $ -   $ -   $ 5.9  
Selling and administrative   12.9     13.9     24.6     2.5     53.9  
Other expenses   1.5     -     -     -     1.5  
  $ 20.3   $ 13.9   $ 24.6   $ 2.5   $ 61.3  
Year ended December 31, 2024                              
Cost of sales $ 2.0   $ -   $ -   $ -   $ 2.0  
Selling and administrative   4.0     6.3     4.2   $ 2.1     16.6  
Other expenses   0.7     -     -     -     0.7  
  $ 6.7   $ 6.3   $ 4.2   $ 2.1   $ 19.3  
Disclosure of detailed information about employee benefits expense [Table Text Block]
    Year ended December 31,  
    2025     2024  
Current employee benefits $ 239.4   $ 239.2  
Profit-sharing plan expense   82.1     51.1  
Share-based compensation (notes 6c, 22, 26)            
Equity settled stock options   2.5     2.1  
Cash-settled restricted share units   20.3     6.7  
Cash-settled deferred share units   13.9     6.3  
Cash-settled performance share units   24.6     4.2  
Employee share purchase plan   2.1     1.8  
Post-employee pension benefits            
Defined benefit plans   4.7     4.4  
Defined contribution plans   2.5     2.1  
Past service cost (note 22, 23)   -     4.3  
Other post-retirement employee benefits   6.0     7.5  
Termination benefits   0.7     1.7  
  $ 398.8   $ 331.4  
Disclosure of detailed information about other operating expense [Table Text Block]
   

Year ended

December 31,

 
    2025     2024  
Regional costs $ 7.7   $ 5.4  
Write-down/loss on disposal of PP&E   3.5     27.4  
Amortization of community costs (other assets)   7.1     8.5  
Restructuring   0.1     1.2  
Wildfire evacuation costs   4.4     -  
Care & maintenance - Manitoba   13.2     14.6  
Evaluation costs   3.5     1.2  
Insurance recovery   (25.0 )   -  
Reduction of obligation to renounce flow-through share expenditures, net of provisions   (5.5 )   (2.0 )
Option agreement proceeds (Marubeni)   (4.5 )   (0.4 )
Other   3.3     1.5  
  $ 7.8   $ 57.4  
Disclosure of detailed information about reversal of impairment loss [Table Text Block]
    As at December 31,
2025
 
Pre-tax impairment reversal to:      
Property, plant & equipment (note 14) $ (322.3 )
Tax impact   79.6  
After-tax impairment reversal $ (242.7 )
Disclosure of detailed information about finance income and expenses [Table Text Block]
    Year ended
December 31,
 
    2025     2024  
Net interest expense on long-term debt            
Net interest expense on long-term debt $ 60.7   $ 69.8  
Accretion on streaming arrangements (note 20)            
Additions   20.5     24.0  
Variable consideration adjustments - prior periods   (0.6 )   0.2  
    19.9     24.2  
Change in fair value of financial instruments            
Gold prepayment liability   -     10.7  
Unrealized loss on non-quotational pricing hedges   -     0.2  
Realized loss on non-quotational pricing hedges   2.3     8.9  
Investments at fair value through profit or loss (note 11)   (55.2 )   (3.2 )
    (52.9 )   16.6  
Other net finance (income) expense            
Net foreign exchange (gain) loss   (18.6 )   21.0  
Accretion on community agreements measured at amortized cost   6.4     4.7  
Accretion on environmental provisions   11.1     10.5  
Accretion on Wheaton refund liability   0.6     0.6  
Accretion on deferred and contingent liability (note 17)   1.4     -  
Withholding taxes   -     2.2  
Loss on disposal of investments   -     0.1  
Interest on equipment financing and leases   9.0     6.7  
Interest income   (22.3 )   (15.7 )
Other finance expense   4.1     8.0  
    (8.3 )   38.1  
Net finance expense $ 19.4   $ 148.7