Debt - Additional Information (Details)								1 Months Ended		3 Months Ended			6 Months Ended
	Jul. 18, 2022 shares	Jun. 29, 2022 CAD ($) shares	Jun. 22, 2022	Mar. 18, 2021 CAD ($)	Mar. 18, 2021 USD ($)	Sep. 09, 2020 CAD ($)	Jun. 20, 2018 CAD ($) Trading_Day $ / shares	Sep. 09, 2020 CAD ($)	Oct. 19, 2018 CAD ($) $ / shares	Sep. 30, 2022 CAD ($)	Jun. 30, 2022 CAD ($) shares	Sep. 30, 2021 CAD ($)	Sep. 30, 2022 CAD ($)	Sep. 30, 2021 CAD ($)	Oct. 24, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jul. 31, 2022 CAD ($) shares	Jun. 30, 2022 $ / shares	Jun. 29, 2022 $ / shares	Mar. 31, 2022 CAD ($)
Debt Instrument [Line Items]
Minimum liquidity, each fiscal quarter					$ 200,000,000
Reduced liquidity requirement																$ 100,000,000
Issuance of long-term debt				$ 893,160,000
Debt Instrument Fair Value													$ 76,424,000
Debt instrument final closing trading days	10 days
Derivative liability										$ 39,896,000			39,896,000
Accretion Rate								11.06%
Conversion Of Outstanding Debentures Description								In addition, the Company may force conversion of the Supreme Debentures outstanding with 30 days’ notice if the daily volume weighted average trading price of the Company’s common shares is greater than $38.59 for any 10 consecutive trading days. The Company, Supreme Cannabis and the Trustee entered into a further supplemental indenture whereby the Company agreed to guarantee the obligations of Supreme Cannabis pursuant to the Supreme Debentures and the Accretion Debentures.
Supreme Cannabis
Debt Instrument [Line Items]
Interest at a rate									6.00%
Maturity date									Sep. 10, 2025
Proceeds from the Credit Facility									$ 100,000,000
Cancellation of Debt						$ 63,500,000
Conversion price | $ / shares									$ 0.285
Monthly Interest Rate						1.00%		1.00%
Percentage of shares acquired			100.00%
Minimum [Member] | Supreme Cannabis
Debt Instrument [Line Items]
Proceeds from the Credit Facility								$ 13,500,000
Maximum | Supreme Cannabis
Debt Instrument [Line Items]
Interest at a rate									8.00%
Proceeds from the Credit Facility								$ 36,500,000
GCILP and Other Notes Holders [Member]
Debt Instrument [Line Items]
Principal amount																	$ 199,522,000
4.25% Senior Notes [Member]
Debt Instrument [Line Items]
Principal amount		$ 262,620,000					$ 600,000,000			$ 337,380,000			$ 337,380,000							$ 600,000,000
Interest at a rate							4.25%			4.25%			4.25%			4.25%
Frequency of periodic payment team													semi-annually on January 15th and July 15th of each year commencing from January 15, 2019
Maturity date							Jul. 15, 2023						Jul. 15, 2023
Accrued and unpaid interest		5,383,000
Aggregate purchase price		$ 259,994,000
Debt instrument cancelled										$ 199,522,000			$ 262,620,000
Debt Conversion, Description							(i) the market price of the Company’s common shares for at least 20 trading days during a period of 30 consecutive trading days ending on the last trading day of the preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day, (ii) during the 5 business day period after any consecutive 5 trading day period (the “Measurement Period”) in which the trading price per $1 principal amount of the Notes for each trading day in the Measurement Period was less than 98% of the product of the last reported sales price of the Company’s common shares and the conversion rate on each such trading day, (iii) the Notes are called for redemption or (iv) upon occurrence of certain corporate events (a “Fundamental Change”). A Fundamental Change occurred upon completion of the investment by the CBI and its affiliates (together, the “CBI Group”) in the Company in November 2018, and no holders of Notes surrendered any portion of their Notes in connection therewith
Conversion price percentage							130.00%						130.00%
Convertible measurement period threshold trading days							5 days
Convertible measurement period threshold consecutive trading days							5 days
Convertible conversion price | $ / shares							$ 1
Maximum discount to last reported sales price							98.00%
Debt instrument, redemption, description													Prior to July 20, 2021, the Company could not redeem the Notes except in the event of certain changes in Canadian tax law.
Debt instrument, redemption period, start date													Jul. 20, 2021
Debt instrument, redemption threshold trading days													20 days
Debt instrument, redemption threshold consecutive trading days													30 days
Number of trading days to provide notice of redemption													5 days
Debt instrument, redemption price, percentage													100.00%
Other income (expense), net										33,709,000			$ 44,370,000
Tax impact on aggregated principal amount										11,291,000			14,862,000
Debt instrument, change in fair value of notes										173,288,000		$ 52,194,000	242,830,000	$ 103,566,000
Debt instrument, change in fair value of notes from contractual interest										3,740,000		$ 6,306,000	9,787,000	$ 12,684,000
Principal redemption										199,522,000			262,620,000
Principal redeemed fair value										174,503,000			225,369,000
4.25% Senior Notes [Member] | Exchange Transaction
Debt Instrument [Line Items]
Derivative liability											$ 26,594,000
4.25% Senior Notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Threshold consecutive trading days | Trading_Day							20
4.25% Senior Notes [Member] | Maximum
Debt Instrument [Line Items]
Threshold consecutive trading days | Trading_Day							30
4.25% Senior Notes [Member] | Common Shares
Debt Instrument [Line Items]
Principal amount											$ 63,098,000						$ 99,522,000
Shares issued | shares		35,662,420									14,069,353						21,593,067
Purchase price of shares | $ / shares																			$ 3.50
Debt Instrument Fair Value											$ 50,866,000
4.25% Senior Notes [Member] | Common Shares | Noteholders [Member]
Debt Instrument [Line Items]
Shares issued | shares	11,896,536
Purchase price of shares | $ / shares																		$ 2.6245
4.25% Senior Notes [Member] | Common Shares | GCILP [Member]
Debt Instrument [Line Items]
Principal amount											200,000,000
Shares issued | shares	29,245,456
Debt Instrument Fair Value													98,078,000
Debt instrument acquired											100,000,000
Debt instrument cancelled											$ 100,000,000
4.25% Senior Notes [Member] | Common Shares | GCILP and Other Notes Holders [Member]
Debt Instrument [Line Items]
Shares issued | shares																	62,735,059
Paydown Agreement [Member]
Debt Instrument [Line Items]
Principal amount															$ 100,000,000
Additional incremental term loan facility					$ 500,000										500,000,000
Minimum liquidity, each fiscal quarter															100,000,000
Share Issued on June and July 2022 [Member]
Debt Instrument [Line Items]
Principal amount										$ 262,620,000			$ 262,620,000
Shares issued | shares											76,804,412
Credit Facility
Debt Instrument [Line Items]
Senior secured debt, Term					5 years
Principal amount					$ 750,000
Senior credit facility					$ 500,000
Loan amortization payment				$ 0
Convertible debentures					Mar. 18, 2026
Credit Facility | Paydown Agreement [Member]
Debt Instrument [Line Items]
Principal amount					$ 187,500										$ 187,500,000
L I B O R Plus
Debt Instrument [Line Items]
Interest at a rate					8.50%
L I B O R Floor
Debt Instrument [Line Items]
Interest at a rate					1.00%