Business Segments and Geographic Information - Schedule of Geographically Located Property and Equipment, Net (Details) - USD ($) $ in Millions	Sep. 26, 2020	Sep. 28, 2019	Sep. 29, 2018
Geographic Information For Property Plant And Equipment [Line Items]
Property, plant and equipment, net	$ 491.5	$ 470.9	$ 478.2
United States
Geographic Information For Property Plant And Equipment [Line Items]
Property, plant and equipment, net	383.0	355.5	366.5
Costa Rica
Geographic Information For Property Plant And Equipment [Line Items]
Property, plant and equipment, net	20.8	33.0	30.9
Europe
Geographic Information For Property Plant And Equipment [Line Items]
Property, plant and equipment, net	77.5	64.4	62.0
Rest of world
Geographic Information For Property Plant And Equipment [Line Items]
Property, plant and equipment, net	$ 10.2	$ 18.0	$ 18.8