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v3.25.4

Other Expense, Net (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Sep. 28, 2025 | Sep. 29, 2024 | Jun. 30, 2024 | Sep. 28, 2025 | Sep. 29, 2024 | Dec. 29, 2024 | Dec. 31, 2023 | Sep. 30, 2024
Other Expense, Net [Line Items] |  |  |  |  |  |  |  |
Other expense | $ 1.1 |  |  |  |  |  | $ 30.7 |
Other income |  |  | $ 2.9 |  |  |  |  |
Issuance of a derivative liability |  |  |  |  |  |  |  | $ 91.5
Forward Purchase Agreements [Member] |  |  |  |  |  |  |  |
Other Expense, Net [Line Items] |  |  |  |  |  |  |  |
Other income |  |  |  |  |  |  | 0.4 |
Related Party [Member] |  |  |  |  |  |  |  |
Other Expense, Net [Line Items] |  |  |  |  |  |  |  |
Other expense |  | $ 3.0 |  |  | $ 3.0 |  |  |
Other income | 0.0 | 2.8 |  | $ 0.1 | 1.8 |  |  |
Issuance of a derivative liability |  |  |  |  |  | $ 3.0 |  |
Fair value of derivative liabilities |  |  |  |  |  | 0.3 |  |
Related Party [Member] | Forward Purchase Agreements [Member] |  |  |  |  |  |  |  |
Other Expense, Net [Line Items] |  |  |  |  |  |  |  |
Other expense |  |  |  |  |  |  | 30.7 |
Borrowings and Derivative Liabilities [Member] |  |  |  |  |  |  |  |
Other Expense, Net [Line Items] |  |  |  |  |  |  |  |
Other income |  | $ 22.8 |  | $ 1.8 | $ 22.8 |  |  |
Mergers [Member] |  |  |  |  |  |  |  |
Other Expense, Net [Line Items] |  |  |  |  |  |  |  |
Other expense |  |  |  |  |  |  | 0.7 |
Related party convertible notes and SAFEs [Member] |  |  |  |  |  |  |  |
Other Expense, Net [Line Items] |  |  |  |  |  |  |  |
Other income |  |  |  |  |  | $ 0.1 | $ 9.1 |

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