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Reverse Recapitalization (Details) - USD ($) $ in Millions			12 Months Ended
	Dec. 31, 2023	Jul. 31, 2023	Dec. 29, 2024	Sep. 28, 2025
Reverse Recapitalization [Line Items]
Net cash proceeds		$ 19.7
Common shares issued (in Shares)	49,065,361		73,784,645	89,167,963
Common shares outstanding (in Shares)	49,065,361		73,784,645	89,167,963
Cash payments	$ 5.4
Legacy Complete Solaria [Member]
Reverse Recapitalization [Line Items]
Professional fees			$ 16.4
Additional paid-in capital			$ 5.8
Class A Common Stock [Member] | Merger [Member]
Reverse Recapitalization [Line Items]
Common shares issued (in Shares)			45,290,553
Common shares outstanding (in Shares)			45,290,553
FACT [Member]
Reverse Recapitalization [Line Items]
Additional paid-in capital			$ 10.6
Previously Reported [Member]
Reverse Recapitalization [Line Items]
Additional paid-in capital			$ 16.4

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Amount of excess of issue price over par or stated value of stock and from other transaction involving stock or stockholder. Includes, but is not limited to, additional paid-in capital (APIC) for common and preferred stock.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Amount of dividend income from investment paid in cash, classified as operating.

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