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Restructuring Charges - Charges Taken Related to Accrued Restructuring Actions (Details) - Restructuring Charges - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 28, 2024 | Sep. 30, 2023 | Sep. 24, 2022
Fiscal 2022 restructuring charges |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Balance |  |  | $ 4.1
Fiscal restructuring charges |  |  | 2.4
Severance payments and adjustments |  |  | (3.4)
Fiscal 2023 restructuring charges |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Balance | $ 9.0 | $ 3.1 |
Fiscal restructuring charges |  | 12.0 |
Severance payments and adjustments |  | (6.1) |
Balance |  | 9.0 | 3.1
Fiscal 2024 restructuring charges |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Fiscal restructuring charges | 41.1 |  |
Non-cash impairment charge | (12.5) |  |
Non-cash accelerated depreciation charge | (7.2) |  |
Severance payments and adjustments | (18.4) |  |
Balance | 12.0 |  |
Fiscal 2024 Actions | Fiscal 2022 restructuring charges |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Balance |  |  | 0.0
Fiscal restructuring charges |  |  | 0.0
Severance payments and adjustments |  |  | 0.0
Fiscal 2024 Actions | Fiscal 2023 restructuring charges |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Balance | 0.0 | 0.0 |
Fiscal restructuring charges |  | 0.0 |
Severance payments and adjustments |  | 0.0 |
Balance |  | 0.0 | 0.0
Fiscal 2024 Actions | Fiscal 2024 restructuring charges |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Fiscal restructuring charges | 36.7 |  |
Non-cash impairment charge | (12.5) |  |
Non-cash accelerated depreciation charge | (7.2) |  |
Severance payments and adjustments | (11.5) |  |
Balance | 5.5 |  |
Fiscal 2023 Actions | Fiscal 2022 restructuring charges |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Balance |  |  | 0.0
Fiscal restructuring charges |  |  | 0.0
Severance payments and adjustments |  |  | 0.0
Fiscal 2023 Actions | Fiscal 2023 restructuring charges |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Balance | 2.3 | 0.0 |
Fiscal restructuring charges |  | 5.5 |
Severance payments and adjustments |  | (3.2) |
Balance |  | 2.3 | 0.0
Fiscal 2023 Actions | Fiscal 2024 restructuring charges |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Fiscal restructuring charges | 0.0 |  |
Non-cash impairment charge | 0.0 |  |
Non-cash accelerated depreciation charge | 0.0 |  |
Severance payments and adjustments | (2.0) |  |
Balance | 0.3 |  |
Fiscal 2022 Actions | Fiscal 2022 restructuring charges |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Balance |  |  | 0.0
Fiscal restructuring charges |  |  | 3.1
Severance payments and adjustments |  |  | (0.4)
Fiscal 2022 Actions | Fiscal 2023 restructuring charges |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Balance | 6.7 | 2.7 |
Fiscal restructuring charges |  | 6.5 |
Severance payments and adjustments |  | (2.5) |
Balance |  | 6.7 | 2.7
Fiscal 2022 Actions | Fiscal 2024 restructuring charges |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Fiscal restructuring charges | 4.4 |  |
Non-cash impairment charge | 0.0 |  |
Non-cash accelerated depreciation charge | 0.0 |  |
Severance payments and adjustments | (4.9) |  |
Balance | 6.2 |  |
Other | Fiscal 2022 restructuring charges |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Balance |  |  | 4.1
Fiscal restructuring charges |  |  | (0.7)
Severance payments and adjustments |  |  | (3.0)
Other | Fiscal 2023 restructuring charges |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Balance | 0.0 | 0.4 |
Fiscal restructuring charges |  | 0.0 |
Severance payments and adjustments |  | (0.4) |
Balance |  | $ 0.0 | $ 0.4
Other | Fiscal 2024 restructuring charges |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Fiscal restructuring charges | 0.0 |  |
Non-cash impairment charge | 0.0 |  |
Non-cash accelerated depreciation charge | 0.0 |  |
Severance payments and adjustments | 0.0 |  |
Balance | $ 0.0 |  |

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