Derivatives (Fair Values Of Derivative Instruments) (Details) (USD $) In Thousands	Jul. 02, 2011	Dec. 31, 2010
Total asset derivatives	$ 2,610	$ 266
Total liability derivatives designated as hedging instruments	(54,300)	(63,700)
Total liability derivatives	(54,300)	(66,661)
Accrued Expenses And Other Current Liabilities [Member] | Commodity Contracts [Member]
Total liability derivatives designated as hedging instruments	(31,600)	(8,900)
Total liability derivatives not designated as hedging instruments		(2,961)
Deferred Credits And Other Liabilities [Member] | Commodity Contracts [Member]
Total liability derivatives designated as hedging instruments	(22,700)	(54,800)
Other Current Assets [Member] | Foreign Exchange Contracts [Member]
Asset derivatives not designated as hedging instruments	88	266
Other Current Assets [Member] | Commodity Contracts [Member]
Asset derivatives not designated as hedging instruments	$ 2,522