v3.26.1
RIGHT-OF-USE ASSETS - Additional information (Details) - CAD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
RIGHT-OF-USE ASSETS      
Right-of-use assets $ 343.4 $ 349.7  
Depreciation 128.1 124.0 $ 98.8
Affiliated corporations      
RIGHT-OF-USE ASSETS      
Right-of-use assets 6.7 9.5  
Depreciation $ 3.1 $ 3.9 $ 4.2