Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Oct. 02, 2011	Oct. 03, 2010	Oct. 02, 2011	Oct. 03, 2010
Condensed Consolidated Statements of Operations [Abstract]
Revenues	$ 546,910	$ 452,878	$ 1,520,818	$ 1,398,997
Cost of revenues	283,065	234,658	795,179	741,215
Gross profit	263,845	218,220	725,639	657,782
Research and development	143,347	140,517	431,567	422,250
Selling, general and administrative	77,874	69,205	218,534	209,720
Restructuring of operations and other items, net	10,784	3,538	2,686	10,244
Income from operations	31,840	4,960	72,852	15,568
Interest expense				(5,601)
Interest income and other, net	7,610	10,315	18,348	6,147
Income from continuing operations before income taxes	39,450	15,275	91,200	16,114
Provision for/(benefit from) income taxes	7,800	2,456	12,596	(13,735)
Income from continuing operations	31,650	12,819	78,604	29,849
(Loss)/income from discontinued operations (including a gain on disposal of $260,066 for the nine months ended October 2, 2011), net of taxes	(2,311)	10,602	254,673	23,524
Net income	$ 29,339	$ 23,421	$ 333,277	$ 53,373
Basic income per share:
Income from continuing operations	$ 0.05	$ 0.02	$ 0.13	$ 0.04
(Loss)/income from discontinued operations		$ 0.02	$ 0.43	$ 0.04
Net income	$ 0.05	$ 0.04	$ 0.56	$ 0.08
Diluted income per share:
Income from continuing operations	$ 0.05	$ 0.02	$ 0.13	$ 0.04
(Loss)/income from discontinued operations		$ 0.02	$ 0.42	$ 0.04
Net income	$ 0.05	$ 0.04	$ 0.55	$ 0.08
Shares used in computing per share amounts:
Basic	567,790	629,852	592,898	646,167
Diluted	581,483	633,731	608,743	653,685