Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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Name:	us-gaap_SeveranceCosts1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Restructuring (Details) - USD ($)	3 Months Ended		9 Months Ended
Restructuring (Details) - USD ($)	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 1,000,000.0	$ 2,700,000	$ 4,800,000	$ 6,000,000.0
Focal and Faxitron [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs	100,000
COVID-19 [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs	900,000
Focal and Faxitron [Member]
Restructuring Cost and Reserve [Line Items]
Estimated severance and benefits future costs	$ 3,900,000