Derivative Financial Instruments (Derivative Instruments Located On The Condensed Consolidated Statements Of Income) (Details) (USD $) In Thousands	3 Months Ended				6 Months Ended
	Jul. 16, 2011		Jul. 17, 2010		Jul. 16, 2011		Jul. 17, 2010
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)	$ (17,300)		$ 3,777		$ (8,807)		$ 27,675
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	7,737		(5,434)		(21,032)		(8,069)
Interest Rate Contracts [Member]
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)	(105)		(1,319)		(242)		(2,709)
Interest Rate Contracts [Member] | Interest Expense (Income) [Member]
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	(380)		(657)		1,181		(2,857)
Commodity Contracts [Member] | Production Costs [Member]
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)	(17,195)		5,096		(8,565)		30,384
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	$ 8,117	[1]	$ (4,777)	[1]	$ (22,213)	[1]	$ (5,212)	[1]

[1] Included in Materials, supplies, labor and other production costs (exclusive of depreciation and amortization shown separately).