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Sunflower Purchases (Narrative) (Details) - SunOpta Grains and Foods Inc. [Member] $ in Millions	12 Months Ended
	Jan. 01, 2022 USD ($)
Minnesota [Member]
Sunflower Purchases [Line Items]
Sunflower seeds purchased	$ 24.1
North Dakota [Member]
Sunflower Purchases [Line Items]
Sunflower seeds purchased	$ 17.4

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	stkl_SunflowerPurchasesLineItems
Namespace Prefix:	stkl_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

Represents amount of sunflower seeds purchased.

+ References

No definition available.

+ Details

Name:	stkl_SunflowerSeedsPurchased
Namespace Prefix:	stkl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- Details

Name:	srt_StatementGeographicalAxis=stpr_MN
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=stkl_SunoptaGrainsAndFoodsIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=stpr_ND
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: