v3.26.3
EXPLORATION AND EVALUATION ASSETS, NET (Details) - CAD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Disclosure Of Exploration And Evaluation Assets [Line Items]        
Beginning Balance     $ 575  
Write-downs $ (15) $ (1) (31) $ (9)
Ending Balance 594   594  
E&E Assets        
Disclosure Of Exploration And Evaluation Assets [Line Items]        
Beginning Balance     575  
Acquisitions     3  
Additions     36  
Transfer from E&E (Note 11)     (4)  
Write-downs     (16)  
Exchange Rate Movements and Other     0  
Ending Balance $ 594   $ 594