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Consolidated Statements of Stockholders’ Deficit (Parentheticals)	12 Months Ended
	Dec. 28, 2025
Statement of Stockholders' Equity [Abstract]
Senior unsecured convertible notes for shares of common stock	7.00%

X

- Definition

Percentage of senior unsecured convertible notes for shares of common stock.

+ References

No definition available.

+ Details

Name:	spwr_SeniorUnsecuredConvertibleNotesForSharesOfCommonStock
Namespace Prefix:	spwr_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_StatementOfStockholdersEquityAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration