Goodwill and Intangible Assets, Intangible Assets Excluding Goodwill (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 27, 2024	Sep. 27, 2024
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	$ (621.5)	$ (589.5)
Total intangible assets, gross carrying amount	1,505.5	1,490.0
Total intangible assets, net carrying amount	$ 884.0	900.5
Developed technology and other
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period (years)	6 years 3 months 18 days
Finite-lived intangible assets, gross	$ 1,363.9	1,379.6
Accumulated amortization	(565.2)	(540.7)
Net carrying amount	$ 798.7	838.9
Technology licenses
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period (years)	3 years 2 months 12 days
Finite-lived intangible assets, gross	$ 106.2	75.0
Accumulated amortization	(56.3)	(48.8)
Net carrying amount	49.9	26.2
In-process research and development
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets, gross	35.4	35.4
Accumulated amortization	0.0	0.0
Net carrying amount	$ 35.4	$ 35.4