Fair Value of Financial Instruments - Summary of Valuation Techniques and Significant Unobservable Inputs in the Fair Value Measurement of Significant Level 3 Financial Instruments (Details) - Level 3	12 Months Ended
	Mar. 31, 2021
Acreage Financial Instrument Probability of Each Scenario
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation techniques	Probability weighted expected return model
Significant unobservable inputs	Probability of each scenario
Relationship of unobservable inputs to fair value	Change in probability of occurrence in each scenario will result in a change in fair value
Acreage Financial Instrument Value and Number of Canopy Shares Issued
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Significant unobservable inputs	Number of common shares to be issued
Relationship of unobservable inputs to fair value	Increase or decrease in value and number of common shares will result in a decrease or increase in fair value
Acreage Financial Instrument Intrinsic Value of Acreage
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Significant unobservable inputs	Probability and timing of US legalization
Relationship of unobservable inputs to fair value	Increase or decrease in probability of US legalization will result in an increase or decrease in fair value
Acreage Financial Instrument Probability and Timing of US Legalization
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Significant unobservable inputs	Estimated premium on US legalization
Relationship of unobservable inputs to fair value	Increase or decrease in estimated premium on US legalization will result in an increase or decrease in fair value
Acreage Financial Instrument Estimated Premium on US Legalization
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Significant unobservable inputs	Control premium
Relationship of unobservable inputs to fair value	Increase or decrease in estimated control premium will result in an increase or decrease in fair value
Acreage Financial Instrument Control Premium
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Significant unobservable inputs	Market access premium
Relationship of unobservable inputs to fair value	Increase or decrease in estimated market access premium will result in an increase or decrease in fair value
TerrAscend Canada Term Loan - October 2019 March 2020
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Significant unobservable inputs	Discount rate
Relationship of unobservable inputs to fair value	Increase or decrease in discount rate will result in a decrease or increase in fair value
TerrAscend Exchangeable Shares, TerrAscend Option
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation techniques	Put option pricing model
Significant unobservable inputs	Probability and timing of US legalization
Relationship of unobservable inputs to fair value	Increase or decrease in probability of US legalization will result in an increase or decrease in fair value
Hempco Debenture
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation techniques	Discounted cash flow
Significant unobservable inputs	Discount rate
Relationship of unobservable inputs to fair value	Increase or decrease in discount rate will result in a decrease or increase in fair value
Terr Ascend Warrants - December 2019, March 2020, December 2020
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation techniques	Monte Carlo simulation model
Significant unobservable inputs	Probability and timing of US legalization
Relationship of unobservable inputs to fair value	Increase or decrease in probability of US legalization will result in an increase or decrease in fair value
Arise Bioscience Term Loan
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation techniques	Discounted cash flow
Significant unobservable inputs	Probability and timing of US legalization
Relationship of unobservable inputs to fair value	Increase or decrease in probability of US legalization will result in an increase or decrease in fair value
SLANG Worldwide Warrant
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation techniques	Black-Sholes option pricing model
Significant unobservable inputs	Probability and timing of US legalization
Relationship of unobservable inputs to fair value	Increase or decrease in probability of US legalization will result in an increase or decrease in fair value
BioSteel Redeemable Noncontrolling Interest Future Wholesale Price and Production Levels
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Significant unobservable inputs	Future wholesale price and production levels
Relationship of unobservable inputs to fair value	Increase or decrease in future wholesale price and production levels will result in an increase or decrease in fair value
Warrant Derivative Liability Volatility of Canopy Growth Share Price
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation techniques	Monte Carlo simulation model
Significant unobservable inputs	Volatility of Canopy Growth share price
Relationship of unobservable inputs to fair value	Increase or decrease in volatility will result in an increase or decrease in fair value
BioSteel Redeemable Noncontrolling Interest Discount Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation techniques	Discounted cash flow
Significant unobservable inputs	Discount rate
Relationship of unobservable inputs to fair value	Increase or decrease in discount rate will result in a decrease or increase in fair value
Vert Mirabel Redeemable Noncontrolling Interest Future Wholesale Price and Production Levels
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Significant unobservable inputs	Future wholesale price and production levels
Relationship of unobservable inputs to fair value	Increase or decrease in future wholesale price and production levels will result in an increase or decrease in fair value
Vert Mirabel Redeemable Noncontrolling Interest Future Wholesale Price and Production Levels Discount Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation techniques	Discounted cash flow
Significant unobservable inputs	Discount rate
Relationship of unobservable inputs to fair value	Increase or decrease in discount rate will result in a decrease or increase in fair value