Condensed Interim Consolidated Statements of Cash Flows (Unaudited) - CAD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash flows from operating activities:
Net (loss) income	$ (2,319,467)	$ 373,624
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation of property, plant and equipment	29,608	37,108
Amortization of intangible assets	13,536	16,804
Share of loss on equity method investments		100
Share-based compensation	15,297	29,079
Asset impairment and restructuring costs	1,783,784	80,690
Income tax expense (recovery)	11,969	(307)
Non-cash fair value adjustments and charges related to settlement of unsecured senior notes	231,704	(834,090)
Change in operating assets and liabilities, net of effects from purchases of businesses:
Amounts receivable	(11,793)	12,354
Inventory	(6,822)	(3,423)
Prepaid expenses and other assets	(17,567)	40,208
Accounts payable and accrued liabilities	14,842	3,778
Other, including non-cash foreign currency	(19,006)	(7,670)
Net cash used in operating activities	(273,915)	(251,745)
Cash flows from investing activities:
Purchases of and deposits on property, plant and equipment	(4,308)	(35,658)
Purchases of intangible assets	(938)	(2,729)
Proceeds on sale of property, plant and equipment	10,784	2,290
Redemption (purchases) of short-term investments	211,092	(705)
Net cash proceeds on sale of subsidiaries	12,432	10,324
(Investment in) sale of other financial assets	(29,205)	110
Net cash outflow on acquisition of subsidiaries		(9,070)
Other investing activities	7,143	(10,859)
Net cash provided by (used in) investing activities	207,000	(46,297)
Cash flows from financing activities:
Proceeds from issuance of common shares and warrants	856	1,460
Proceeds from exercise of stock options	270	4,886
Repayment of long-term debt	(423)	(49,991)
Other financing activities	(13,116)	(3,036)
Net cash used in financing activities	(12,413)	(46,681)
Effect of exchange rate changes on cash and cash equivalents	50,042	(2,309)
Net decrease in cash and cash equivalents	(29,286)	(347,032)
Cash and cash equivalents, beginning of period	776,005	1,154,653
Cash and cash equivalents, end of period	746,719	807,621
Cash received during the period:
Income taxes	4,709	87
Interest	13,092	9,269
Cash paid during the period:
Income taxes	665	334
Interest	66,927	60,017
Noncash investing and financing activities
Additions to property, plant and equipment	$ 211	$ 2,961