Consolidated Statements of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Total revenue	$ 1,433.4	$ 1,405.4	$ 1,405.9
Cost of sales	967.8	988.9	963.9
Gross margin	465.6	416.5	442.0
Operating expenses:
Research and development	165.8	171.6	156.9
Selling, general and administrative	215.9	205.7	206.8
Amortization of acquisition-related intangibles	10.6	15.5	18.2
Restructuring, impairments, and other costs	49.8	15.9	14.1
Charge for (release of) litigation	4.4	(12.6)	1.3
Total operating expenses	446.5	396.1	397.3
Operating income	19.1	20.4	44.7
Realized loss on sale of securities			12.9
Other expense, net	6.5	9.2	8.1
Income (loss) before income taxes	12.6	11.2	23.7
Provision for (benefit from) income taxes	47.8	6.2	(0.9)
Net income (loss)	$ (35.2)	$ 5.0	$ 24.6
Net income (loss) per common share:
Basic	$ (0.29)	$ 0.04	$ 0.19
Diluted	$ (0.29)	$ 0.04	$ 0.19
Weighted average common shares:
Basic	121.4	127.2	126.7
Diluted	121.4	128.7	129.0