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Summary of Significant Accounting Policies - Derivatives (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Sep. 28, 2024 | Sep. 30, 2023 | Sep. 24, 2022 | Mar. 23, 2023
Derivative [Line Items] |  |  |  |
Notional amount | $ 1,000.0 |  |  |
Variable interest rate | 123.00% |  |  |
Gain (loss) recognized in other comprehensive loss | $ (18.3) | $ (9.2) | $ 44.0 |
Notional amount | 378.5 |  |  |
Interest Rate Swap |  |  |  |
Derivative [Line Items] |  |  |  |
Notional amount | 1,000.0 |  |  |
Gain (loss) recognized in other comprehensive loss | (18.3) | $ (9.2) | $ 44.0 |
Interest Rate Swap, 2023 |  |  |  |
Derivative [Line Items] |  |  |  |
Variable interest rate |  |  |  | 3.46%
Notional amount |  |  |  | $ 500.0
Assets at fair value | $ 2.9 |  |  |
Interest Rate Swap, 2024 |  |  |  |
Derivative [Line Items] |  |  |  |
Variable interest rate |  |  |  | 2.98%
Notional amount |  |  |  | $ 500.0
Forward foreign currency contracts |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative contract period, or less | 1 year |  |  |

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