v3.26.1
INVENTORIES - Narrative (Details) - CAD ($)
$ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Inventories [Abstract]    
Cost of inventories recognised as expense during period $ 552.2 $ 557.2
Impairment of inventories to net realizable value $ 17.6 $ 2.1