Goodwill and Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Jun. 27, 2025	Jun. 28, 2024	Mar. 29, 2024	Jun. 27, 2025	Jun. 28, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, period increase (decrease)	$ 0.0			$ 0.0
Goodwill, impairment loss	0.0			0.0
Finite-Lived Intangible Assets [Line Items]
Asset impairment charges	$ 0.0	$ 0.7		0.0	$ 16.8
Completed and transferred in-process research and development		$ 33.4	$ 55.7	$ 24.7	$ 89.1
Finite-lived intangible assets, useful life	8 years	12 years	8 years	8 years	12 years
Amortization of intangible assets	$ 45.8	$ 46.0		$ 139.8	$ 139.6
In-process research and development
Finite-Lived Intangible Assets [Line Items]
Asset impairment charges	$ 0.0	$ 0.0		$ 0.0	$ 16.1