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Investments - Schedule of Equity Method Investments (Details) $ in Thousands, $ in Thousands								12 Months Ended
	Sep. 25, 2020 USD ($)	Sep. 25, 2020 CAD ($)	Nov. 07, 2019	Nov. 06, 2019	Oct. 25, 2019 $ / shares shares	Jun. 14, 2018	Mar. 13, 2018	Dec. 31, 2020 USD ($)	Dec. 31, 2020 CAD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Schedule of Equity Method Investments [Line Items]
Investments in equity accounted investees								$ 19,235		$ 557	$ 2,960
Advances to affiliates										15,135
Transfer to investments in equity accounted investees								18,505
Share of loss from investments in equity accounted investees								(4,510)		(2,009)	(723)
Equity Method Investment, Summarized Financial Information [Abstract]
Current assets								1,372,172		1,573,260
Current liabilities								206,834		332,888
Income Statement [Abstract]
Revenue								46,719		23,750	12,121
Gross profit								(25,833)		(17,597)	6,213
Net loss								(75,270)		1,165,574	(21,817)
Equity Method Investments
Equity Method Investment, Summarized Financial Information [Abstract]
Current assets								19,126		23,200	7,121
Non-current assets								122,099		76,212	27,129
Current liabilities								24,223		52,796	3,746
Non-current liabilities								76,313		33,189	13,201
Income Statement [Abstract]
Revenue								367		52	5,344
Gross profit								(631)		0	0
Net loss								$ (11,453)		(2,048)	(874)
IPO | Cronos Australia
Schedule of Equity Method Investments [Line Items]
Sale of stock, number of shares issued in transaction (in shares) | shares					40,000,000
Sale of stock, price per share (in aud per share) | $ / shares					$ 0.50
Cronos Australia
Schedule of Equity Method Investments [Line Items]
Ownership interest								31.00%
Investments in equity accounted investees								$ 0		(346)
Advances to affiliates										274
Transfer to investments in equity accounted investees								0
Share of loss from investments in equity accounted investees								$ (363)		$ (1,101)	(588)
Cronos Australia | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Ownership percentage			31.00%	50.00%				31.00%	31.00%	31.00%
Cronos GrowCo
Schedule of Equity Method Investments [Line Items]
Ownership interest								50.00%
Investments in equity accounted investees								$ 19,235		$ 1,501
Advances to affiliates	$ 37,010	$ 49,300								15,494
Transfer to investments in equity accounted investees	$ 18,505	$ 24,650						18,505	$ 24,650
Share of loss from investments in equity accounted investees								$ (1,537)		$ (167)	(100)
Cronos GrowCo | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Ownership percentage						50.00%		50.00%	50.00%	50.00%
Cronos GrowCo | Cronos Group, Inc.
Schedule of Equity Method Investments [Line Items]
Funding commitment percentage	0.50	0.50
Cronos GrowCo | Mucci
Schedule of Equity Method Investments [Line Items]
Advances to affiliates	$ 18,505	$ 24,650
Funding commitment percentage	0.50	0.50
Natuera
Schedule of Equity Method Investments [Line Items]
Ownership interest								50.00%
Investments in equity accounted investees								$ 0		$ (598)
Advances to affiliates										219
Transfer to investments in equity accounted investees								0
Share of loss from investments in equity accounted investees								$ (2,610)		$ (805)	0
Natuera | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Ownership percentage								50.00%	50.00%	50.00%
Whistler
Schedule of Equity Method Investments [Line Items]
Share of loss from investments in equity accounted investees								$ 0		$ 29	178
MedMen Canada
Schedule of Equity Method Investments [Line Items]
Advances to affiliates										(852)
Transfer to investments in equity accounted investees								0
Share of loss from investments in equity accounted investees								$ 0		$ 35	$ (213)
MedMen Canada | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Ownership percentage							50.00%	50.00%	50.00%	50.00%

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