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Share-Based Compensation - Share-Based Compensation, Cash-Based Awards and Related Tax Benefit Recognized in Condensed Consolidated Statements of Operations (Detail) - USD ($) $ in Millions | 12 Months Ended
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Jun. 27, 2020 | Jun. 29, 2019 | Jun. 30, 2018
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |
Total | $ 60.4 | $ 59.0 | $ 71.3
Income tax benefit on share-based compensation | 6.3 | 4.3 | 11.1
Phantom Stock Unit [Member] |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |
Total | 11.1 |  |
Cost of Revenue [Member] |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |
Total | 2.1 | 3.1 | 3.2
Cost of Revenue [Member] | Phantom Stock Unit [Member] |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |
Total | 0.2 |  |
Research and Development [Member] |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |
Total | 32.3 | 33.7 | 38.6
Research and Development [Member] | Phantom Stock Unit [Member] |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |
Total | 9.1 |  |
Selling, General, and Administrative [Member] |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |
Total | 26.0 | $ 22.2 | $ 29.5
Selling, General, and Administrative [Member] | Phantom Stock Unit [Member] |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |
Total | $ 1.8 |  |

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