Property, Plant and Equipment - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Property, Plant and Equipment [Abstract]
Amortization of assets held under capital leases	$ 3.8	$ 3.4	$ 3.0
Capital lease additions	6.7	11.8	20.5
Purchase of property, plant and equipment included in accounts payable	$ 10.0	$ 11.2	$ 10.8