v3.26.1
Leases - Schedule of Lease Assets (Details) - CAD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of operating segments [line items]      
Lease assets $ 3,001 $ 1,394 $ 1,458
Operating segments | North America      
Disclosure of operating segments [line items]      
Lease assets 370 257  
Operating segments | North Sea      
Disclosure of operating segments [line items]      
Lease assets 32 25  
Operating segments | Offshore Africa      
Disclosure of operating segments [line items]      
Lease assets 35 93  
Operating segments | Oil Sands Mining and Upgrading      
Disclosure of operating segments [line items]      
Lease assets 2,457 932  
Head Office      
Disclosure of operating segments [line items]      
Lease assets $ 107 $ 87