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Summary of Significant Accounting Policies - Derivatives (Details) $ in Millions	12 Months Ended
	Sep. 27, 2025 USD ($)	Sep. 28, 2024 USD ($)	Sep. 30, 2023 USD ($)	Mar. 23, 2023 USD ($) instrument
Derivative [Line Items]
Notional amount			$ 1,000.0
Variable interest rate			1.23%
Gain (loss) recognized in other comprehensive loss	$ (0.1)	$ (18.3)	$ (9.2)
Notional amount	354.8
Interest Rate Swap
Derivative [Line Items]
Notional amount			1,000.0
Number of instruments held | instrument				2
Gain (loss) recognized in other comprehensive loss	(0.1)	$ (18.3)	$ (9.2)
Interest Rate Swap, 2023
Derivative [Line Items]
Variable interest rate				3.46%
Notional amount				$ 500.0
Assets at fair value	$ 3.2
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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The number of derivative instruments of a particular group held by the entity.

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