Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Apr. 01, 2012	Apr. 03, 2011
Condensed Consolidated Statements of Operations [Abstract]
Revenues	$ 622,424	$ 473,264
Cost of revenues	335,512	249,090
Gross profit	286,912	224,174
Research and development	169,871	142,347
Selling, general and administrative	90,100	68,867
Restructuring of operations and other items, net	15,462	2,806
Income from operations	11,479	10,154
Interest income and other, net	14,656	4,288
Income from continuing operations before income taxes	26,135	14,442
Benefit from income taxes	(49,062)	(4,104)
Income from continuing operations	75,197	18,546
Loss from discontinued operations, net of taxes	0	(8,392)
Net income	$ 75,197	$ 10,154
Basic income/(loss) per share:
Income from continuing operations	$ 0.13	$ 0.03
Loss from discontinued operations		$ (0.01)
Net income	$ 0.13	$ 0.02
Diluted income/(loss) per share:
Income from continuing operations	$ 0.13	$ 0.03
Loss from discontinued operations		$ (0.01)
Net income	$ 0.13	$ 0.02
Shares used in computing per share amounts:
Basic	566,709	615,450
Diluted	590,556	629,733