Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2015	Jun. 29, 2014	Jun. 28, 2015	Jun. 29, 2014
Total revenue	$ 355.2	$ 371.6	$ 710.9	$ 715.7
Cost of sales	245.4	247.4	493.1	487.3
Gross margin	$ 109.8	$ 124.2	$ 217.8	$ 228.4
Gross margin %	30.90%	33.40%	30.60%	31.90%
Operating expenses:
Research and development	$ 42.3	$ 43.0	$ 84.0	$ 84.1
Selling, general and administrative	57.8	55.0	110.5	110.5
Amortization of acquisition-related intangibles	2.1	2.2	4.2	6.4
Restructuring, impairments, and other costs	4.2	4.7	8.9	10.8
Charge for litigation				4.4
Goodwill impairment charge			0.6
Total operating expenses	106.4	104.9	208.2	216.2
Operating income	3.4	19.3	9.6	12.2
Other expense, net	1.6	2.6	2.8	3.7
Income before income taxes	1.8	16.7	6.8	8.5
Provision for (benefit from) income taxes	2.7	(1.1)	6.6
Net income (loss)	$ (0.9)	$ 17.8	$ 0.2	$ 8.5
Net income (loss) per common share:
Basic	$ (0.01)	$ 0.14		$ 0.07
Diluted	$ (0.01)	$ 0.14		$ 0.07
Weighted average common shares:
Basic	116.1	122.7	116.7	124.0
Diluted	116.1	123.9	119.2	125.6