v3.25.4
Risk Management - Credit Default Swaps (Details) - CAD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of credit risk exposure [line items]    
Notional amount $ 513,010 $ 499,021
Credit protection purchased 0 0
Credit default swaps    
Disclosure of credit risk exposure [line items]    
Notional amount 109 114
Total fair value $ 1 $ 2
Weighted average maturity 2 years 3 years
Credit default swaps | AA    
Disclosure of credit risk exposure [line items]    
Notional amount $ 22 $ 23
Total fair value $ 0 $ 1
Weighted average maturity 2 years 3 years
Credit default swaps | A    
Disclosure of credit risk exposure [line items]    
Notional amount $ 65 $ 68
Total fair value $ 1 $ 1
Weighted average maturity 2 years 3 years
Credit default swaps | BBB    
Disclosure of credit risk exposure [line items]    
Notional amount $ 22 $ 23
Total fair value $ 0 $ 0
Weighted average maturity 1 year 2 years
Credit default swaps | CDS Credit    
Disclosure of credit risk exposure [line items]    
Notional amount $ 109 $ 114
Total fair value $ 1 $ 2
Weighted average maturity 2 years 3 years