Business Segments and Geographic Information - Schedule of Geographically Located Property and Equipment, Net (Details) - USD ($) $ in Millions	Sep. 28, 2019	Sep. 29, 2018	Sep. 24, 2016
Geographic Information For Property Plant And Equipment [Line Items]
Property, plant and equipment, net	$ 470.9	$ 478.2	$ 472.8
United States
Geographic Information For Property Plant And Equipment [Line Items]
Property, plant and equipment, net	355.5	366.5	368.1
Costa Rica
Geographic Information For Property Plant And Equipment [Line Items]
Property, plant and equipment, net	33.0	30.9	30.1
Europe
Geographic Information For Property Plant And Equipment [Line Items]
Property, plant and equipment, net	64.4	62.0	57.1
Rest of world
Geographic Information For Property Plant And Equipment [Line Items]
Property, plant and equipment, net	$ 18.0	$ 18.8	$ 17.5