INVESTMENT IN EQUITY ACCOUNTED INVESTEES - Narrative (Details) - CAD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Interest in Other Entities [Abstract] | ||
| Unrecognised share of profit of joint ventures | $ 1.9 | $ 1.8 |
| Cumulative unrecognised share of losses of joint ventures | 6.6 | 8.5 |
| Cumulative unrecognised share of comprehensive losses of joint ventures | $ 5.4 | $ 7.6 |