v3.26.1
REVENUE - Schedule of Major Products and Services (Parenthetical) (Details) - CAD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Disaggregation of Revenue [Line Items]    
Realized gain/(loss) on derivative $ 0 $ 99
Revenues from lease contracts 166 158
Total revenue from contracts with customers $ 8,968 $ 8,777