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v3.20.2

Revenue - Narrative (Details) - CAD ($) | 12 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019
Revenue from contracts with customers [Abstract] |  |
Variable consideration, actual and estimated future returns and price adjustments | $ 15,300,000 | $ 0
Return liability for estimated variable revenue consideration | $ 2,100,000 | $ 0

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- Definition Obligations For Returns, Refunds And Other Similar Obligations + References No definition available. + Details
Name: | acb_ObligationsForReturnsRefundsAndOtherSimilarObligations
Namespace Prefix: | acb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Revenue from contracts with customers [Abstract] + References No definition available. + Details
Name: | acb_RevenuefromcontractswithcustomersAbstract
Namespace Prefix: | acb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Variable Consideration, Actual And Estimated Future Returns And Price Adjustments + References No definition available. + Details
Name: | acb_VariableConsiderationActualAndEstimatedFutureReturnsAndPriceAdjustments
Namespace Prefix: | acb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration