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Sunflower Purchases (Narrative) (Details) - SunOpta Grains and Foods Inc. [Member] $ in Millions | 12 Months Ended
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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

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- 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: |

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

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