CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Dec. 30, 2017	Dec. 31, 2016
Income Statement [Abstract]
Net revenue	$ 404.6	$ 265.0	$ 647.8	$ 523.1
Cost of sales	232.7	176.3	406.6	351.0
Amortization of acquired developed technologies	0.8	1.7	1.6	3.4
Gross profit	171.1	87.0	239.6	168.7
Operating expenses:
Research and development	43.8	38.7	80.1	75.6
Selling, general and administrative	35.7	31.0	62.3	56.1
Restructuring and related charges	0.8	4.0	3.7	6.9
Total operating expenses	80.3	73.7	146.1	138.6
Income from operations	90.8	13.3	93.5	30.1
Unrealized gain (loss) on derivative liability	7.9	4.8	12.1	(17.9)
Interest and other income (expense), net	(3.2)	(0.2)	(6.6)	0.0
Income before income taxes	95.5	17.9	99.0	12.2
Provision for (benefit from) income taxes	(109.3)	6.1	(112.9)	3.8
Net income	204.8	11.8	211.9	8.4
Cumulative dividends on Series A Preferred Stock	(0.3)	(0.2)	(0.5)	(0.4)
Net income attributable to common stockholders	$ 204.5	$ 11.6	$ 211.4	$ 8.0
Net income per share attributable to common stockholders:
Basic (usd per share)	$ 3.29	$ 0.19	$ 3.42	$ 0.13
Diluted (usd per share)	$ 3.17	$ 0.19	$ 3.29	$ 0.13
Shares used in per share calculation attributable to common stockholders
Basic (in shares)	62.2	60.3	61.9	60.1
Diluted (in shares)	64.6	62.7	64.5	61.1