Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 01, 2012	Jul. 03, 2011	Jul. 01, 2012	Jul. 03, 2011
Condensed Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 58,713	$ 293,784	$ 133,910	$ 303,938
Other comprehensive (loss)/income before tax:
Foreign currency translation adjustments	(4,844)	190	(3,397)	1,591
Unrealized gain on investments for the period	553	384	1,244	1,421
Reclassification adjustments for gain on investments included in net income	(918)	(802)	(1,413)	(1,513)
Unrealized loss on investments	(365)	(418)	(169)	(92)
Unrealized (loss)/gain on derivatives for the period	(1,989)	399	(1,349)	1,021
Reclassification adjustments for loss/(gain) on derivatives included in net income	1,335	(759)	2,008	(972)
Unrealized (loss)/gain on derivatives	(654)	(360)	659	49
Amortization of transition asset, prior service cost and net actuarial loss	4,183	1,784	8,152	3,562
Other comprehensive (loss)/income before tax	(1,680)	1,196	5,245	5,110
Income tax expense related to items of other comprehensive (loss)/income
Other comprehensive (loss)/income, net of tax	(1,680)	1,196	5,245	5,110
Comprehensive income	$ 57,033	$ 294,980	$ 139,155	$ 309,048