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Stock-Based Compensation - Compensation by Function (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 28, 2019 | Dec. 29, 2018 | Dec. 28, 2019 | Dec. 29, 2018
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Total stock-based compensation | $ 11.3 | $ 9.6 | $ 21.6 | $ 17.7
Cost of revenues |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Total stock-based compensation | 1.0 | 0.9 | 2.0 | 1.7
Research and development |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Total stock-based compensation | 2.0 | 1.6 | 3.7 | 2.8
Selling, general and administrative |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Total stock-based compensation | $ 8.3 | $ 7.1 | $ 15.9 | $ 13.2

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