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REVENUE RECOGNITION - Narrative (Details) | 12 Months Ended
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Dec. 29, 2024 revenue_stream
Revenue from Contract with Customer [Abstract] |
Number of revenue streams | 1

X
- Definition Number Of Revenue Stream + References No definition available. + Details
Name: | sg_NumberOfRevenueStream
Namespace Prefix: | sg_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_RevenueFromContractWithCustomerAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration