Derivatives - Effect of Derivative Instruments on Condensed Consolidated Statements of Earnings (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Amount of Gain or (Loss) Recognized in Earnings on Derivatives	$ 2,625	$ (1,293)
Cost of Products Sold [Member] | Commodity Contract [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Amount of Gain or (Loss) Recognized in OCI on Derivatives (Effective Portion)		(2,264)
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Earnings (Effective Portion)		(10,854)
Amount of Gain or (Loss) Recognized in Earnings on Derivatives (Ineffective Portion)		500
Cost of Products Sold [Member] | Commodity Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Amount of Gain or (Loss) Recognized in Earnings on Derivatives	2,509	(1,350)
Cost of Products Sold [Member] | Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Amount of Gain or (Loss) Recognized in Earnings on Derivatives	$ 116	$ 57