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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

X

- 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

X

- 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

X

- References

No definition available.

+ Details

Name:	us-gaap_RevenueFromContractWithCustomerAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration