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Stock-Based Compensation - Total Stock-Based Compensation Expense (Details) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2019
Jun. 24, 2018
Jun. 25, 2017
Employee Service share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total stock-based compensation expense $ 49.6 $ 37.9 $ 35.3
Cost of revenue, net      
Employee Service share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total stock-based compensation expense 8.8 6.5 7.8
Research and development      
Employee Service share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total stock-based compensation expense 7.7 6.8 7.5
Sales, general and administrative      
Employee Service share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total stock-based compensation expense $ 33.1 $ 24.6 $ 20.0