Comprehensive Income (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2011	Oct. 03, 2010	Oct. 02, 2011	Oct. 03, 2010
Changes in the total comprehensive income or loss, net of taxes
Net income	$ 29,339	$ 23,421	$ 333,277	$ 53,373
Net unrealized (loss)/gain on investments	(689)	738	(781)	2,046
Net unrealized (loss)/gain on derivatives	(2,455)	2,019	(2,406)	767
Foreign currency translation adjustments	(3,104)	4,928	(1,516)	2,808
Net actuarial loss	(1,855)		(1,855)
Amortization of transition asset, prior-service cost and net actuarial loss	1,930	549	5,494	1,643
Total comprehensive income	$ 23,166	$ 31,655	$ 332,213	$ 60,637