v3.26.1
Non-Controlling Interest (Narrative) (Details) - Copper Mountain Mine (BC) Ltd. [Member]
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Apr. 30, 2025
Disclosure of Non-Controlling Interest [Line Items]      
Proportion of ownership interest in subsidiary 100.00% 75.00%  
Mitsubishi Materials Corporation [Member]      
Disclosure of Non-Controlling Interest [Line Items]      
Percentage of voting equity interests acquired     25.00%
Proportion of voting rights held by non-controlling interests   25.00%