v3.26.3
REDEEMABLE NONCONTROLLING INTERESTS - Schedule of Redeemable NCI (Details) - CAD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Sep. 30, 2025
Redeemable Noncontrolling Interest [Line Items]      
Redeemable noncontrolling interests $ 1,433 $ 736 $ 736
Westcoast Energy Limited Partnership [Member]      
Redeemable Noncontrolling Interest [Line Items]      
Redeemable noncontrolling interests 736 736  
Westcoast Expansion Financing Limited Partnership [Member]      
Redeemable Noncontrolling Interest [Line Items]      
Redeemable noncontrolling interests $ 697 $ 0