Comprehensive Income (Reconciliation Of Net Income (Loss) To Comprehensive Income) (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 25, 2011	Sep. 26, 2010	Sep. 25, 2011	Sep. 26, 2010
Comprehensive Income [Abstract]
Net income	$ 183,594	$ 88,829	$ 493,434	$ 193,311
Foreign currency translation adjustment	(20,058)	36,284	(2,060)	6,053
Unrealized gains (losses) on marketable securities	(164)	1,219	938	709
Unrealized net gains (losses) arising during period	5,420	(9,006)	(5,659)	(2,936)
Less: net (gains) losses reclassified into net income	(4,014)	401	(19,088)	277
Total derivative financial instruments	9,434	(9,407)	13,429	(3,213)
Amortization of actuarial loss	5,896	4,969	18,760	14,908
Amortization of net prior service (credit) cost	(141)	318	(1,001)	952
Pension and postretirement plan funded status adjustment		(70,586)	546	(70,586)
Less: actuarial loss reclassified into net income due to settlement		(300)		(1,925)
Less: prior service (cost) credit reclassified into net income due to net curtailment loss		(17,738)	(1)	(17,094)
Total pension and postretirement benefit plans	5,755	(47,261)	18,306	(35,707)
Total comprehensive income, net of tax	$ 178,561	$ 69,664	$ 524,047	$ 161,153