Taxes on Earnings - Schedule of Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions	Oct. 02, 2020	Sep. 27, 2019
Income Tax Disclosure [Abstract]
Deferred revenues	$ 12.5	$ 21.1
Deferred compensation	24.7	33.9
Product warranty	4.8	5.5
Inventory adjustments	5.4	6.0
Share-based compensation	9.6	12.4
Accruals and reserves	18.9	11.8
Net operating loss carryforwards	157.2	120.7
Lease liability	12.6	0.0
Other	53.1	38.9
Total deferred tax assets, gross	298.8	250.3
Valuation allowance	(137.9)	(99.7)
Total deferred tax assets	160.9	150.6
Tax-deductible goodwill	(23.6)	(20.7)
Intangibles	(52.2)	(61.7)
Property, plant and equipment	(8.3)	(7.1)
Unremitted earnings of foreign subsidiaries	(58.8)	(34.1)
Leased asset	(11.0)	0.0
Other	(26.7)	(17.6)
Total deferred tax liabilities	(180.6)	(141.2)
Deferred tax assets	81.5	84.7
Net current deferred tax liabilities (included in accrued liabilities)	(101.2)	(75.3)
Deferred Tax Liabilities, Net	$ (19.7)
Net deferred tax assets		$ 9.4