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Restructuring (Details) - USD ($)
3 Months Ended 6 Months Ended
Mar. 28, 2020
Mar. 30, 2019
Mar. 28, 2020
Mar. 30, 2019
Restructuring Cost and Reserve [Line Items]        
Severance Costs $ 1,000,000.0      
Restructuring Charges 2,900,000 $ 1,600,000 $ 3,900,000 $ 3,300,000
COVID-19 [Member]        
Restructuring Cost and Reserve [Line Items]        
Estimated severance and benefits future costs 1,000,000.0      
Sunnyvale [Member]        
Restructuring Cost and Reserve [Line Items]        
Estimated severance and benefits future costs 1,300,000      
Tepnel [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring Charges 1,300,000      
Cynosure        
Restructuring Cost and Reserve [Line Items]        
Restructuring Reserve, Translation and Other Adjustment 2,000,000.0      
Share Based Compensation Expense Included Other Restructuring Costs $ 2,600,000