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Restructuring Charges - Additional Information (Detail) $ in Millions | 12 Months Ended | 24 Months Ended
--- | --- | ---
Sep. 30, 2023 USD ($) position | Sep. 24, 2022 USD ($) | Sep. 25, 2021 USD ($) | Sep. 30, 2023 USD ($) position
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | $ 12.0 | $ 2.4 | $ 9.3 |
Various Locations |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Severance charges | 9.4 | 0.3 |  |
Restructuring and Related Cost, Number of Positions Eliminated | position |  |  |  | 128
Various Locations | Facility Closing |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges |  | 0.5 |  |
Danbury, Connecticut |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Severance charges | 2.1 | $ 1.6 |  |
Restructuring and Related Cost, Expected Cost | $ 5.9 |  |  | $ 5.9
Restructuring and Related Cost, Number of Positions Eliminated | position | 111 |  |  |

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