Financial Instruments (Fair Values Of Derivative Instruments Designated As Hedging Instruments) (Details) (Designated As Hedging Instrument [Member], USD $) In Thousands	Sep. 25, 2011	Dec. 31, 2010
Derivatives, Fair Value [Line Items]
Total asset derivatives	$ 66	$ 880
Total liability derivatives	15,566	25,200
Other Assets - Current [Member] | Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Total asset derivatives	60	880
Other Asset - Noncurrent [Member] | Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Total asset derivatives	6
Derivative Liabilities - Current [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Total liability derivatives	14,811	15,004
Derivative Liabilities - Current [Member] | Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Total liability derivatives	519	630
Other Liabilities - Noncurrent [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Total liability derivatives	$ 236	$ 9,566