Stock-Based Compensation - Compensation by Function (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 30, 2019	Mar. 31, 2018	Mar. 30, 2019	Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation	$ 10.8	$ 7.6	$ 28.5	$ 22.8
Cost of revenues
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation	1.1	0.8	2.8	2.4
Research and development
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation	1.6	1.2	4.4	3.7
Selling, general and administrative
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation	$ 8.1	$ 5.6	$ 21.3	$ 16.7