v3.25.4
CAPITAL RISK MANAGEMENT - Available Liquidity (Details) - CAD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of classes of share capital [line items]      
Cash and cash equivalents $ 1,344 $ 898 $ 800
Short-term borrowings 4,000 2,959  
Total 10,349 7,801  
Net available 5,879 4,833  
Revolving and Letters of Credit      
Disclosure of classes of share capital [line items]      
Borrowings 55 13  
Revolving Credit Facility      
Disclosure of classes of share capital [line items]      
Maximum borrowing capacity 4,260 4,000  
Borrowings 10 10  
Net available 4,135 3,535  
Letters of Credit      
Disclosure of classes of share capital [line items]      
Maximum borrowing capacity 45 3  
Borrowings 45 3  
Net available 0 0  
Revolving And Non-Revolving Credit Facility Borrowings And Accounts Receivable Securitization      
Disclosure of classes of share capital [line items]      
Borrowings 4,415    
Revolving      
Disclosure of classes of share capital [line items]      
Borrowings 115    
Non-revolving      
Disclosure of classes of share capital [line items]      
Maximum borrowing capacity 2,300 500  
Borrowings 2,300 500  
Net available 0 0  
Short-term borrowings 2,000 507 0
Receivables securitization      
Disclosure of classes of share capital [line items]      
Net available 400 400  
Trade receivables, maximum commitment 2,400 2,400  
Short-term borrowings $ 2,000 2,000 $ 1,600
Accounts Receivable Securitization Program And Non-Revolving Credit Facility      
Disclosure of classes of share capital [line items]      
Short-term borrowings   2,500  
US CP Program      
Disclosure of classes of share capital [line items]      
Borrowings   $ 455