Operating Segments and Geographic Information (Details 2) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 02, 2016	Dec. 27, 2014	Jan. 02, 2016	Dec. 27, 2014
Information on reportable segments
Amortization of acquired technologies	$ (4.6)	$ (9.2)	$ (8.9)	$ (17.3)
Gross profit	141.8	133.1	282.3	262.0
Stock-based compensation	(8.9)	(10.5)	(24.9)	(21.0)
Amortization of intangibles	(3.7)	(4.9)	(7.5)	(9.9)
Restructuring and related charges	(1.4)	(9.1)	(1.8)	(10.2)
Operating income (loss)	9.2	(21.2)	6.3	(33.6)
Post-separation expenses			5.6
Severance and related costs			3.5
Segment Measures
Information on reportable segments
Gross profit	147.9	143.7	294.0	282.0
Operating income (loss)	30.5	19.1	59.2	32.1
Reconciling Items
Information on reportable segments
Stock-based compensation	(1.4)	(1.0)	(2.6)	(2.0)
Amortization of acquired technologies	(4.6)	(9.2)	(8.9)	(17.3)
Other charges related to non-recurring activities	(0.1)	(0.4)	(0.2)	(0.7)
Gross profit	(6.1)	(10.6)	(11.7)	(20.0)
Stock-based compensation	(8.9)	(10.5)	(24.9)	(21.0)
Amortization of intangibles	(8.3)	(14.1)	(16.4)	(27.2)
Other charges related to non-recurring activities	(2.7)	(6.6)	(9.8)	(7.3)
Restructuring and related charges	(1.4)	(9.1)	(1.8)	(10.2)
Operating income (loss)	$ (21.3)	$ (40.3)	$ (52.9)	$ (65.7)