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Acquisitions and Investments in Joint Ventures - Investments - Additional Information (Details) $ in Millions | 12 Months Ended
--- | ---
Sep. 25, 2021 USD ($) venture | Sep. 26, 2020 USD ($) venture | Sep. 28, 2019 USD ($) venture
Schedule of Equity Method Investments [Line Items] |  |  |
Investments in business | $ | $ 0.5 | $ 4.4 | $ 2.0
Owned percentage in unconsolidated entities | 3.00% |  |
Number of ventures | venture | 1 | 2 | 2
Minimum |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Owned percentage in unconsolidated entities |  | 3.00% |
Maximum |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Owned percentage in unconsolidated entities |  | 30.00% | 7.00%

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