CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions		3 Months Ended
		Sep. 29, 2018	Sep. 30, 2017
Income Statement [Abstract]
Net revenue		$ 354.1	$ 243.2
Cost of sales		227.3	173.9
Amortization of acquired developed technologies		0.8	0.8
Gross profit		126.0	68.5
Operating expenses:
Research and development		34.6	36.3
Selling, general and administrative		33.0	26.6
Restructuring and related charges		1.3	2.9
Total operating expenses		68.9	65.8
Income from operations		57.1	2.7
Unrealized gain (loss) on derivative liability		(2.1)	4.2
Interest and other income (expense), net		(2.4)	(3.4)
Income before income taxes		52.6	3.5
Provision for (benefit from) income taxes		5.2	(3.6)
Net income		47.4	7.1
Items reconciling net income to net income attributable to common stockholders:
Cumulative dividends on Series A Preferred Stock		(0.2)	(0.2)
Earnings allocated to Series A Preferred Stock		(1.1)	(0.2)
Net income attributable to common stockholders - Basic		46.1	6.7
Add: Earnings allocated to Series A Preferred Stock		0.0	0.2
Add/Less: Unrealized (gain) loss on derivative liability on Series A Preferred Stock		0.0	(4.2)
Add: Cumulative dividends on Series A Preferred Stock		0.0	0.2
Net income attributable to common stockholders - Diluted	[1]	$ 46.1	$ 2.9
Net income per share attributable to common stockholders:
Basic (usd per share)		$ 0.73	$ 0.11
Diluted (usd per share)		$ 0.72	$ 0.04
Shares used to compute net income per share attributable to common stockholders:
Basic (in shares)		63.1	61.7
Diluted (in shares)		63.9	64.5

[1] (a) For the three months ended September 30, 2017, our diluted earnings per share attributable to common stockholders is calculated using the if-converted method because it is more dilutive, whereas for the three months ended September 29, 2018, our diluted earnings per share attributable to common stockholders is calculated using the treasury stock method.