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Investments in Equity Accounted Investees - Summary of Reconciliation of Carrying Amount of Investments in Associates and Joint Ventures (Parenthetical) (Detail) - CAD ($)
$ in Thousands
12 Months Ended
Sep. 27, 2018
Dec. 31, 2018
MedMen Canada [member]    
Disclosure Of Significant Investments In Equity Accounted Investees [Line Items]    
Ownership percentage   50.00%
Cronos Australia [member]    
Disclosure Of Significant Investments In Equity Accounted Investees [Line Items]    
Percentage of ownership interest 100.00%  
Percentage of capital expenditure funding to be provided 50.00%  
Percentage of operating expense funding to be provided 50.00%  
Capital and operating expense funding to be provided $ 10,000  
Cronos Australia [member]    
Disclosure Of Significant Investments In Equity Accounted Investees [Line Items]    
Percentage of ownership interest 100.00%  
Whistler [member]    
Disclosure Of Significant Investments In Equity Accounted Investees [Line Items]    
Percentage of voting control   20.00%
Top of Range [member] | Whistler [member]    
Disclosure Of Significant Investments In Equity Accounted Investees [Line Items]    
Ownership percentage   20.00%
Minimum [member] | MedMen Canada [member]    
Disclosure Of Significant Investments In Equity Accounted Investees [Line Items]    
License term   20 years