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Stock-Based Compensation - Total Stock-Based Compensation Expense (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 27, 2020 | Dec. 29, 2019 | Dec. 27, 2020 | Dec. 29, 2019
Employee Service share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Total stock-based compensation expense | $ 13.7 | $ 11.6 | $ 27.4 | $ 27.1
Cost of revenue, net |  |  |  |
Employee Service share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Total stock-based compensation expense | 3.7 | 2.4 | 7.1 | 4.4
Research and development |  |  |  |
Employee Service share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Total stock-based compensation expense | 2.2 | 2.0 | 4.6 | 4.1
Sales, general and administrative |  |  |  |
Employee Service share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Total stock-based compensation expense | $ 7.8 | $ 7.2 | $ 15.7 | $ 18.6

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