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Financial Statement Details - Activity of Allowance for Bad Debts (Details) - USD ($)
$ in Millions
 12 Months Ended
Jun. 28, 2020
Jun. 30, 2019
Jun. 24, 2018
Accounts Receivable, Allowance for Credit Loss [Roll Forward]      
Balance at beginning of period $ 0.2    
Balance at end of period 0.7 $ 0.2  
Allowance for Bad Debts      
Accounts Receivable, Allowance for Credit Loss [Roll Forward]      
Balance at beginning of period 0.2 0.2 $ 0.1
Current period provision change 0.6 0.0 0.2
Write-offs, net of recoveries (0.1) 0.0 (0.1)
Balance at end of period $ 0.7 $ 0.2 $ 0.2