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Revenue - Additional Information (Details) - CAD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Mar. 31, 2026
Revenue from Contract with Customer [Abstract] |  |  |
Allowance for estimated returns and price adjustments | $ 2,019 | $ 923 |
Liability for estimated returns and price adjustments | $ 2,097 |  | $ 3,638

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- Definition Allowance for estimated returns and price adjustments. + References No definition available. + Details
Name: | cgc_AllowanceForEstimatedReturnsAndPriceAdjustments
Namespace Prefix: | cgc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Liability for estimated sales returns and price adjustments. + References No definition available. + Details
Name: | cgc_LiabilityForEstimatedSalesReturnsAndPriceAdjustments
Namespace Prefix: | cgc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_RevenueFromContractWithCustomerAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration