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Debt (Details) - USD ($)
3 Months Ended 6 Months Ended
Sep. 28, 2018
Jan. 01, 2021
Dec. 27, 2019
Jan. 01, 2021
Dec. 27, 2019
Jul. 03, 2020
Debt Instrument [Line Items]            
Proceeds from issuance of debt       $ 160,000,000 $ 0  
Long-term debt   $ 160,000,000   160,000,000   $ 0
Interest Expense   (73,000) $ 0 (73,000) $ 0  
Amount of outstanding letter of credit   799,000   799,000    
Revolving Credit Facility            
Debt Instrument [Line Items]            
Maximum borrowing capacity $ 750,000,000          
Term of revolving credit facility 5 years          
Term Loan            
Debt Instrument [Line Items]            
Debt issuance costs   $ 3,697,000   $ 3,697,000