Derivative Financial Instruments (Derivatives In Cash Flow Hedging Relationships) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Amount of Gain or (Loss) Recognized in Earnings on Derivatives	$ (1,479)	$ 8,206	$ (85)	$ 9,591
Cost of Sales [Member] | Commodity Contract [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Amount of Gain or (Loss) Recognized in OCI on Derivatives (Effective Portion)		(4,531)	(2,264)	(7,230)
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Earnings (Effective Portion)	(10,554)	(9,023)	(31,961)	(27,282)
Amount of Gain or (Loss) Recognized in Earnings on Derivatives (Ineffective Portion)		600	500	600
Cost of Sales [Member] | Commodity Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Amount of Gain or (Loss) Recognized in Earnings on Derivatives	(1,454)	7,485	(231)	9,462
Cost of Sales [Member] | Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Amount of Gain or (Loss) Recognized in Earnings on Derivatives	$ (25)	$ 721	$ 146	$ 129