Other Income (Expense), Net - Schedule of Other Income (Expense), Net (Details) - CAD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Other Income and Expenses [Abstract]
Fair value changes on other financial assets	$ (47,432)	$ (82,306)	$ (46,619)	$ (17,188)
Fair value changes on equity method investments	(13,668)		(89,638)
Fair value changes on debt		(27,066)		(25,214)
Fair value changes on acquisition related contingent consideration and other	(6,717)	3,741	(33,472)	10,517
Gain (charges) related to settlement of debt	320	(7,262)	22,439	(12,553)
Interest income	2,416	3,454	4,474	11,285
Interest expense	(21,278)	(27,415)	(42,421)	(59,600)
Foreign currency gain (loss)	674	4,737	707	4,598
Other income (expense), net	380	3,783	5,336	5,922
Other income (expense), net	$ (85,305)	$ (128,334)	$ (179,194)	$ (82,233)