Discontinued Operations (Details 2) - Spinoff - Lumentum - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Dec. 27, 2014	Jan. 02, 2016	Dec. 27, 2014
Discontinued Operations
Net revenues	$ 210.7	$ 66.5	$ 429.0
Cost of revenues	141.4	49.7	287.4
Amortization of acquired technologies	1.9	0.6	3.8
Gross profit	67.4	16.2	137.8
Research and development	35.0	12.5	69.8
Selling, general and administrative	18.8	24.0	36.0
Restructuring charges	0.6	0.1	2.4
Total operating expenses	54.4	36.6	108.2
(Loss) income from operations	13.0	(20.4)	29.6
Interest and other income (expense), net	(0.1)	0.5	(0.3)
(Loss) income before income taxes	12.9	(19.9)	29.3
Income tax provision	0.3	30.5	0.6
Net (loss) income from discontinued operations	$ 12.6	$ (50.4)	$ 28.7