v3.25.4
Derivative and Hedging Instruments - Balances in Cash Flow Hedge Reserve (Details) - Cash flow hedges - CAD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of detailed information about hedging instruments [line items]    
Balances in the cash flow hedge reserve for continuing hedges $ (54) $ 10
Balances remaining in the cash flow hedge reserve on de-designated hedges 0 0
Total $ (54) $ 10