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Discontinued Operations (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Sep. 28, 2025 | Sep. 29, 2024 | Sep. 28, 2025 | Sep. 29, 2024 | Dec. 29, 2024 | Dec. 31, 2023 | Mar. 13, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest | $ (569) | $ 981 | $ (1,275) | $ (18,948) |  |  |
Analytical, Food and Enterprise Services businesses [Member] |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
(Loss) Gain on Sale, before Income Tax | (300) | 400 | (600) | (25,100) | $ (25,400) | $ 811,500 |
Discontinued Operation, Tax Effect of Discontinued Operation | $ 200 | $ (600) | $ 700 | $ (6,100) |  |  |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent |  |  |  |  | $ (12,700) | $ 513,600 |
Disposal Group, Consideration, Contingent on Exit Valuation |  |  |  |  |  |  | $ 150,000
Disposal Group, Consideration, Cash Proceeds at Closing |  |  |  |  |  |  | $ 2,270,000

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