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Convertible Notes - Schedule of Change in Principal Balance of Unsecured Convertible Note (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)
Convertible Notes [Abstract]
Issued	$ 18,000
Converted to common shares	$ (18,000)

X

- Definition

Information about convertible notes

+ References

No definition available.

+ Details

Name:	sndl_ConvertibleNotesAbstract
Namespace Prefix:	sndl_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Unsecured convertible notes issued.

+ References

No definition available.

+ Details

Name:	sndl_UnsecuredConvertibleNotesIssued
Namespace Prefix:	sndl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Unsecured convertible notes principal balance converted to common shares.

+ References

No definition available.

+ Details

Name:	sndl_UnsecuredConvertibleNotesPrincipalBalanceConvertedToCommonShares
Namespace Prefix:	sndl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration