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Commitments and Contingencies (Details)
$ in Millions
9 Months Ended 12 Months Ended
Jun. 28, 2019
USD ($)
Sep. 27, 2019
USD ($)
Lawsuit
Jun. 26, 2020
USD ($)
Nov. 30, 2019
USD ($)
Loss Contingencies [Line Items]        
Severance costs $ 19.8      
Number of class action lawsuits | Lawsuit   2    
Accrued Expenses and Other Current Liabilities        
Loss Contingencies [Line Items]        
Estimate of possible loss       $ 21.0
Chairman, President and Chief Executive Officer | Employee severance and other costs | Accrued Payroll and Related Expenses        
Loss Contingencies [Line Items]        
Severance costs   $ 10.4    
Severance costs accrual, current     $ 6.7