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v3.26.1

Consolidated Statements of Operations and Comprehensive Loss (Parentheticals) - USD ($) | 12 Months Ended
--- | ---
Dec. 28, 2025 | Dec. 29, 2024
Income Statement [Abstract] |  |
Revenue and commission expense attributable to related party | $ 1,000 | $ 1,600
Related party interest expense and amortization of debt issuance costs | $ 5,700 | $ 7,600

X
- Definition Related party interest expense and amortization of debt issuance costs. + References No definition available. + Details
Name: | spwr_RelatedPartyInterestExpenseAndAmortizationOfDebtIssuanceCosts
Namespace Prefix: | spwr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of revenue and commission expense attributable to related party. + References No definition available. + Details
Name: | spwr_RevenueAndCommissionExpenseAttributableToRelatedParty
Namespace Prefix: | spwr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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