Income Taxes (Details 2) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jul. 02, 2016	Apr. 02, 2016	Dec. 26, 2015	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 27, 2014	Sep. 27, 2014	Jul. 02, 2016	Jun. 27, 2015	Jun. 28, 2014
Reconciliation of the Company's income tax expense (benefit) at the federal statutory rate to the income tax expense (benefit) at the effective tax rate
Income tax (benefit) expense computed at federal statutory rate									$ 3.4	$ (8.6)	$ 3.4
State taxes, net of federal benefit									0.1	0.0	0.0
Foreign rate differential									21.3	0.2	0.0
Change in Valuation allowance									(29.4)	(2.2)	(2.4)
Reversal of previously accrued taxes									0.0	(21.8)	(0.3)
Research and experimentation benefits and other tax credits									(4.4)	(3.1)	(4.4)
Permanent items									0.7	(0.7)	1.9
Stock-Based Compensation									4.3	1.2	0.0
SubpartF									4.0	12.7	0.0
Unrecognized tax benefits									0.0	1.0	0.9
Other									0.4	0.2	0.0
Total income tax (benefit) expense	$ 0.1	$ 0.1	$ 0.5	$ (0.3)	$ 0.9	$ (23.4)	$ 0.8	$ 0.6	$ 0.4	$ (21.1)	$ (0.9)