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v3.25.3

REVENUE RECOGNITION - Narrative (Details) | 9 Months Ended
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Sep. 28, 2025
Loyalty Program |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Customer loyalty program liability, expiration period | 180 days

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- Definition Customer Loyalty Program Liability, Expiration Period + References No definition available. + Details
Name: | sg_CustomerLoyaltyProgramLiabilityExpirationPeriod
Namespace Prefix: | sg_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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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: | us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_ProductOrServiceAxis=sg_LoyaltyProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |