v3.26.1
Long-Term Debt - Schedule of Debt Repayments (Details) - CAD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of maturity analysis for non-derivative financial liabilities [line items]    
Borrowings $ 16,617 $ 18,819
Gross carrying amount    
Disclosure of maturity analysis for non-derivative financial liabilities [line items]    
Borrowings 16,707 $ 18,909
Gross carrying amount | 2026    
Disclosure of maturity analysis for non-derivative financial liabilities [line items]    
Borrowings 441  
Gross carrying amount | 2027    
Disclosure of maturity analysis for non-derivative financial liabilities [line items]    
Borrowings 5,637  
Gross carrying amount | 2028    
Disclosure of maturity analysis for non-derivative financial liabilities [line items]    
Borrowings 775  
Gross carrying amount | 2029    
Disclosure of maturity analysis for non-derivative financial liabilities [line items]    
Borrowings 1,029  
Gross carrying amount | 2030    
Disclosure of maturity analysis for non-derivative financial liabilities [line items]    
Borrowings 685  
Gross carrying amount | Thereafter    
Disclosure of maturity analysis for non-derivative financial liabilities [line items]    
Borrowings $ 8,140