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Debt - Additional Information (Details) |  |  |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |  |  |  |
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Nov. 10, 2022 CAD ($) | Nov. 10, 2022 USD ($) | Oct. 24, 2022 USD ($) $ / shares | Jul. 18, 2022 shares | Jun. 29, 2022 CAD ($) shares | Jun. 22, 2022 | Mar. 18, 2021 CAD ($) | Mar. 18, 2021 USD ($) $ / shares | Sep. 09, 2020 CAD ($) | Jun. 20, 2018 CAD ($) Trading_Day $ / shares | Sep. 09, 2020 CAD ($) | Oct. 19, 2018 CAD ($) $ / shares | Dec. 31, 2022 CAD ($) | Jun. 30, 2022 CAD ($) shares | Dec. 31, 2021 CAD ($) | Dec. 31, 2022 CAD ($) | Dec. 31, 2021 CAD ($) | Dec. 31, 2022 USD ($) | Nov. 10, 2022 USD ($) | Jul. 31, 2022 CAD ($) shares | Jun. 30, 2022 $ / shares | Jun. 29, 2022 $ / shares | Mar. 31, 2022 CAD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument discounted price |  |  | $ 930,000 |  |  |  |  | $ 930,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
First repayment of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 117,951,000 | $ 50,217,000 |  |  |  |  |  |
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% |  | 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 |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  |  | $ 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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 44,370,000 |  |  |  |  |  |  |
Tax impact on aggregated principal amount |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  | 14,862,000 |  |  |  |  |  |  |
Debt instrument, change in fair value of notes |  |  |  |  |  |  |  |  |  |  |  |  | 4,427,000 |  | $ 16,806,000 | 238,403,000 | 120,372,000 |  |  |  |  |  |
Debt instrument, change in fair value of notes from contractual interest |  |  |  |  |  |  |  |  |  |  |  |  | 3,583,000 |  | $ 6,444,000 | 13,370,000 | $ 19,128,000 |  |  |  |  |  |
Principal redemption |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  | 262,620,000 |  |  |  |  |  |  |
Principal redeemed fair value |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  | 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 |  |  |  |  |  |  |  | 500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument discounted price per us dollar | $ / shares |  |  | $ 1,000 |  |  |  |  | $ 1,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
First repayment of debt |  |  | $ 174,375,000 |  |  |  |  | $ 174,375,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  | $ 187,500,000 |  |  |  |  | $ 187,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
First repayment of debt | $ 117,528,000 | $ 87,852,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal payment amount | $ 126,324,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 94,427,000 |  |  |  |
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% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

X
- Definition Accretion Rate + References No definition available. + Details
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Namespace Prefix: | cgc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Accumulated other comprehensive income into income tax expense, Tax. + References No definition available. + Details
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Namespace Prefix: | cgc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Additional incremental debt. + References No definition available. + Details
Name: | cgc_AdditionalIncrementalSeniorSecuredDebt
Namespace Prefix: | cgc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Additional incremental term loan facility. + References No definition available. + Details
Name: | cgc_AdditionalIncrementalTermLoanFacility
Namespace Prefix: | cgc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Cancellation of Debt. + References No definition available. + Details
Name: | cgc_CancellationOfDebt
Namespace Prefix: | cgc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Conversion OF Outstanding Debentures Description + References No definition available. + Details
Name: | cgc_ConversionOfOutstandingDebenturesDescription
Namespace Prefix: | cgc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Debt instrument acquired. + References No definition available. + Details
Name: | cgc_DebtInstrumentAcquired
Namespace Prefix: | cgc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Debt instrument aggregate purchase price. + References No definition available. + Details
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Namespace Prefix: | cgc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Debt instrument cancelled. + References No definition available. + Details
Name: | cgc_DebtInstrumentCancelled
Namespace Prefix: | cgc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Debt instrument convertible conversion price measurement period. + References No definition available. + Details
Name: | cgc_DebtInstrumentConvertibleConversionPriceMeasurementPeriod
Namespace Prefix: | cgc_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

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- Definition Debt instrument convertible measurement threshold consecutive trading period. + References No definition available. + Details
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Namespace Prefix: | cgc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Debt instrument convertible measurement threshold trading period. + References No definition available. + Details
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Namespace Prefix: | cgc_
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