Stock-Based Compensation - Total Stock-Based Compensation Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 29, 2020	Mar. 31, 2019	Mar. 29, 2020	Mar. 31, 2019
Employee Service share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 11.4	$ 13.5	$ 41.3	$ 34.5
Cost of revenue, net
Employee Service share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	2.8	2.2	7.5	5.6
Research and development
Employee Service share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	2.4	1.9	7.2	5.6
Sales, general and administrative
Employee Service share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 6.2	$ 9.4	$ 26.6	$ 23.3