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Organization and Significant Accounting Policies - Investments, Additional Information (Details) $ in Millions	12 Months Ended
	Sep. 27, 2025 USD ($) company	Sep. 28, 2024 USD ($)	Sep. 30, 2023 USD ($)
Schedule of Equity Method Investments [Line Items]
Number of unconsolidated companies | company	14
Equity method losses	$ 0.1	$ 6.7	$ 0.2
Equity investment impairment		7.5
Investment in unconsolidated companies	$ 30.5	$ 31.5
Minimum | Thirteen Unconsolidated Companies
Schedule of Equity Method Investments [Line Items]
Owned percentage in unconsolidated entities	1.00%
Maximum | Thirteen Unconsolidated Companies
Schedule of Equity Method Investments [Line Items]
Owned percentage in unconsolidated entities	50.00%

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