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v3.20.4

Revenue - Additional Information (Details) - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Revenue [Abstract] |  |
Maximum period to settle receivables from contracts with customers | 30 days |
Impairment loss (reversal) on receivables from contracts with customers | $ (0.5) | $ 0.6

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- References No definition available. + Details
Name: | ifrs-full_RevenueAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Impairment loss (reversal) on receivables or contract assets arising from contracts with customers. + References No definition available. + Details
Name: | sndl_ImpairmentLossReversalOnReceivablesOrContractAssetsArisingFromContractsWithCustomers
Namespace Prefix: | sndl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Maximum period to settle receivables from contracts with customers. + References No definition available. + Details
Name: | sndl_MaximumPeriodToSettleReceivablesFromContractsWithCustomers
Namespace Prefix: | sndl_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration