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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
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