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Commitments and Contingencies - Product Warranty Liability (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2019
Jun. 24, 2018
Jun. 25, 2017
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]      
Balance at beginning of period $ 1.8 $ 1.6 $ 0.1
Warranties accrued in current period 0.5 0.3 1.6
Expenditures (1.0) (0.1) (0.1)
Balance at end of period $ 1.3 $ 1.8 $ 1.6