Goodwill and Intangible Assets - Gross Carrying Amount and Accumulated Amortization of Intangible Assets (Detail) - USD ($) $ in Millions	Oct. 02, 2020	Sep. 27, 2019
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross carrying amount	$ 417.7	$ 408.7
Accumulated Amortization	(158.7)	(120.7)
Total remaining amortization	259.0	288.0
In-process R&D with indefinite lives	12.3	12.7
Intangible assets, gross carrying amount	430.0	421.4
Intangible assets, net carrying amount	271.3	300.7
Technologies and patents
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross carrying amount	228.0	226.4
Accumulated Amortization	(110.9)	(85.9)
Total remaining amortization	117.1	140.5
Customer contracts, supplier relationships and partner relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross carrying amount	128.9	121.1
Accumulated Amortization	(34.7)	(25.7)
Total remaining amortization	94.2	95.4
Trade names
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross carrying amount	53.0	55.1
Accumulated Amortization	(7.0)	(3.0)
Total remaining amortization	46.0	52.1
Other
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross carrying amount	7.8	6.1
Accumulated Amortization	(6.1)	(6.1)
Total remaining amortization	$ 1.7	$ 0.0