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Document and Entity Information
 12 Months Ended
Mar. 31, 2018
shares
Document And Entity Information [Abstract]  
Document Type 40-F
Amendment Flag false
Document Period End Date Mar. 31, 2018
Document Fiscal Year Focus 2018
Document Fiscal Period Focus FY
Trading Symbol CGC
Entity Registrant Name CANOPY GROWTH CORPORATION
Entity Central Index Key 0001737927
Current Fiscal Year End Date --03-31
Entity Well Known Seasoned Issuer Yes
Entity Current Reporting Status Yes
Entity Voluntary Filers No
Entity Filer Category Large Accelerated Filer
Entity Common Stock Shares Outstanding 200,989,264