Revenue - Revenue by Type (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 822,900,000	$ 852,400,000	$ 2,429,500,000	$ 2,501,400,000
Contract with Customer, Liability, Revenue Recognized	18,000,000.0		95,500,000
Capital equipment, components and software
Disaggregation of Revenue [Line Items]
Revenues	113,500,000	248,900,000	513,100,000	736,600,000
Consumables
Disaggregation of Revenue [Line Items]
Revenues	588,100,000	455,100,000	1,511,400,000	1,318,200,000
Service
Disaggregation of Revenue [Line Items]
Revenues	116,400,000	141,600,000	388,600,000	424,600,000
Other
Disaggregation of Revenue [Line Items]
Revenues	$ 4,900,000	$ 6,800,000	$ 16,400,000	$ 22,000,000.0